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Department of Pharmacology, Karnataka College of Pharmacy, Bengaluru, Karnataka, India.
Peptic ulcer disease (PUD) is a gastrointestinal condition of multifactorial nature, caused by the lack of balance in the combination of aggressive determinants (i.e., acid, pepsin, Helicobacter pylori infection, and non-steroidal anti-inflammatory drugs NSAIDs) and protective ones (i. e., mucus secretion, bicarbonate secretion, and blood circulation of the mucosa) [1]. Although conventional therapies like proton pump inhibitors and antibiotics have proven to be effective in the short term, their prolonged use is linked to adverse effects, recurrence and increasing resistance to antibiotics, and the alternative approaches to these therapies should be explored to determine less harmful but effective effects.Plant-derived gastro-protective agents have opened up as potential therapeutic agents because they have multi-targeted effects, better safety record and are widely available. These agents have their effects by various pharmacological effects, such as antioxidant, anti-secretory, cytoprotective, anti-inflammatory and anti-H. pylori effects. Phytochemicals which include flavonoids, tannins, alkaloids and terpenoids at the molecular level regulate important signaling pathways that are involved in ulcerogenesis such as reducing oxidative stress, enhancement of prostaglandin production, regulation of nitric oxide and inhibition of cytokines [7,8].The ethanol induced, NSAID induced, pylorus ligation, stress induced, and H. pylori associated ulcer models have shown considerable gastroprotective of plant extracts, which include reduced ulcer index, reduced gastric acidity and mucosal recovery [5562]. The comparative studies indicate that the effects of plant-derived agents are as efficient as those of standard drugs with minimal side effects and other advantages, including synergistic properties and entering endogenous defense mechanisms.Nevertheless, they have certain limitations to their clinical translation in the form of their inadequate standardization, phytochemical variations, insufficient clinical trials, and regulatory concerns. The areas that should be targeted in the future through research are the isolation of bioactive compounds, improved drug delivery systems, clinical validation, and harmonization of regulations.To sum up, gastroprotective agents of vegetable origin are a promising and versatile solution to the PUD treatment, potentially being safer and more effective than traditional methods or even used as alternatives to them.
Peptic ulcer disease (PUD) is a multidimensional gastrointestinal condition, which is associated with lesions in gastric or duodenal mucosa caused by an imbalance between aggressive factors including gastric acid, pepsin, Helicobacter pylori, and protective factors such as mucus secretion, bicarbonate production, and blood flow in the mucosa [1]. Although prevalence has decreased in particular areas, PUD is still afflicting millions of people globally and is one of the biggest clinical issues as it causes complications, such as hemorrhage, perforation, and malignancy of the stomach [2].
Helicobacter pylori infection and chronic administration of non-steroidal anti-inflammatory drugs (NSAIDs) are strongly linked to the pathogenesis of PUD and both of them weaken mucosal defense and favor inflammation and oxidative stress [3]. The modern pharmacological treatment is mainly proton pump inhibitors (PPIs), H 2 -receptor blockers, H. pylori eradication antibiotics, and mucosal protective agents [2]. In spite of their efficacy, long-term use of these therapies is mainly linked to various complications like malabsorption of nutrients, rebound acid hypersecretion, difficulty to avoid infections as well as the development of antibiotic resistance [4]. Such restrictions require the identification of more therapeutic options that are safer and more sustainable.
Gastroprotective agents that are plant-derived have received significant attention over the past years based on their broad spectrum of therapeutic effects, acceptable nature across cultures, and relatively few side effects [5]. The pharmacological activities of medicinal plants are due to a large number of different phytochemicals, including flavonoids, alkaloids, tannins, terpenoids and phenolic compounds [6]. These bioactive compounds demonstrate gastro protective properties under a variety of mechanisms which include antioxidant properties, mucosal defense, gastric acid secretion, and inflammatory pathways [7].
On the molecular level, plant-derived compounds have been found to modulate the major pathways of signaling in ulcerogenesis, including inhibition of pro-inflammatory cytokines (e.g., TNF- alpha, IL-1 beta), increase in prostaglandin production, and anti-oxidant activity [8]. Also, a number of phytoconstituents are antimicrobial against H. pylori, making it a solution to one of the leading etiological causes of PUD [6]. The interactions of different plant constituents are also synergistic and therefore increase their therapeutic effect, which provides a multi-targeted approach in the management of ulcers [5].
In preclinical and clinical trials, the plant-based therapies have been reported to induce a significant reduction in ulcer index, gastric acidity, and mucosal damage and enhancement of the healing processes and fortification of the mucosal defenses [7]. Nevertheless, with the promising outcomes, there exist several challenges like the absence of standardization, variability of the phytochemical composition, low clinical trials and regulatory challenges that hamper their general clinical implementation [6].Thus, there is a need to conduct a thorough analysis of the gastroprotective properties of plant compounds in order to comprehend molecular pathways, compare their performance to the current therapeutical options, and search novel therapeutical opportunities. The purpose of this review is to critically examine these features in order to enable the production of effective, safe and evidence-based plant based treatment of peptic ulcer disease.
Pathophysiology of Peptic Ulcer Disease
The pathogenesis of peptic ulcer disease (PUD) is due to the loss of the balance between the aggressive factors of the lumen and the protective functions of the gastric and duodenal mucosa [9]. Factors that promote aggression such as gastric acid, pepsin, infection by Helicobacter pylori, secretion of bile salts, and non-steroidal anti-inflammatory drugs (NSAIDs) are against those that provide defense to the mucosa, such as secretion of mucus-bicarbonate, maintenance of cell integrity in epithelial cells, production of prostaglandins, sufficient blood flow, and the ability to regenerate the mucosa quickly [10].Gastric acid is a key factor in the formation of ulcers in that it facilitates the injury of the mucosal area and the conversion of pepsinogen to pepsin which undermines mucosal protein further [11]. Increased acid production in the duodenum, especially hypersecretion of acid, causes duodenal ulcers to produce more acid load, which causes erosion and ulceration of the mucosa [9]. But acid by itself is not enough to produce ulcers unless the mucosal defenses are impaired.Helicobacter pylori infection plays a significant role as a pathogen of PUD and is one of the factors that cause mucosal damage in a variety of ways [12]. The bacterium settles on the gastric mucosa and releases virulence factors including cytotoxin-associated gene A (CgA) and vacuolating cytotoxin A (VacA) which cause inflammation and injury to the epithelial cells [12]. Moreover, H. pylori increases the production of pro-inflammatory cytokines including interleukin-1 0 (IL-1 0 ) and tumor necrosis factor-alpha (TNF-alpha), which causes chronic gastritis and impairment of mucosal integrity [13]. It also changes gastric acid secretion through the modulation of the levels of the gastrin and somatostatin, which also contribute to the development of ulcers [12].ther main causes of PUD are NSAIDs which essentially inhibit the cyclooxygenase (COX) enzymes, particularly COX-1, the enzyme that converts to produce prostaglandins [14]. The effects that the prostaglandins show in the mucosal defense are; they stimulate the secretory of the mucus and bicarbonate, increase the blood flow of the mucosa and repair the epithelium [14]. They are inhibited leading to decreased mucosal defense, acid secretion and vulnerability to damage. NSAIDs have also direct topical irritant activity on the gastric epithelium, which adds to damage of the mucosal damage [10].One of the major factors of the pathogenesis of PUD is oxy-stress, which is associated with an overwhelming of the system of antioxidants by an excess of reactive oxygen species (ROS) [15]. ROS cause lipid peroxidation, damage of proteins and DNA damage which result in mucosal cell apoptosis and necrosis [15]. This oxidative damage also increases inflammation and decreases the healing of ulcers.The mechanism of ulcer progression includes a central role of inflammation in which activated immune cells emit cytokines and chemokines and inflammatory mediators that aggravate tissue damage [13]. The heightened activity of nuclear factor-kappa B (NF- 8 B ) and other signaling pathways results in long-lasting responses to an inflammatory reaction and mucosal healing defect [15]. Also, the production of nitric oxide (NO) is reduced, and it worsens the blood flow to the mucosal area and angiogenesis of mucosa, which further slows down the healing process [10].The mucosal defense mechanisms have significant effect in ulcerogenesis and their hampering is a crucial occurrence. The initial line of defense is the mucus-bicarbonate barrier; this is the one that cancels the gastric acid and prevents the damage to the epithelia [11]. The mucosa is predisposed by the breakage of this obstacle due to decreased secretion of mucus or alteration of its composition. In addition, the mucosal blood circulation decreases and this influences the distribution of nutrients and the excretion of poisonous wastes, which suppress the healing process and regenerative capacity of tissue [10].In conclusion, the pathophysiology of PUD is multifactorial being a complex of acid secretion, H. pylori infection, NSAID-induced injury, oxidative stress, inflammation, and the inability of the mucosal defense. The relevance of these mechanisms is vital in expounding on effective therapeutic strategies particularly in designing therapeutic agents founded on plant derivatives as gastroprotectives corroborating concomitant reactions in the same time.
3. Molecular Mechanisms of Gastroprotection by Plant-Derived Agents
3.1 Antioxidant Mechanism
The pathophysiology of peptic ulcer disease (PUD) is largely dependent on oxidative stress, since excessive production of reactive oxygen species (ROS) such as superoxide anion (O??), hydroxyl radicals (•OH), and hydrogen peroxide (H?O?) causes mucosal damage and ulcer formation [15]. These reactive species lead to DNA damage, lipid peroxidation, and protein denaturation, which in turn causes cellular necrosis and apoptosis in the stomach mucosa [16]. By scavenging free radicals and boosting endogenous antioxidant defense systems, plant-derived gastroprotective drugs have a substantial antioxidant effect [17]. By donating electrons to counteract ROS, phytochemicals such flavonoids, phenolic acids, tannins, and terpenoids shield stomach epithelial cells from oxidative damage [18]. Additionally, these substances prevent lipid peroxidation, a crucial step in the breakdown of cell membrane integrity during ulcerogenesis [16].
The increase of endogenous antioxidant enzymes, such as glutathione peroxidase (GPx), catalase (CAT), and superoxide dismutase (SOD), is one of the main antioxidant processes [19]. These enzymes are essential for both preserving cellular redox equilibrium and detoxifying reactive oxygen species. It has been demonstrated that plant extracts boost these enzymes' activity, fortifying the stomach mucosal defense mechanism against oxidative damage [17].Furthermore, non-enzymatic antioxidants like reduced glutathione (GSH), which is crucial for cellular defense against oxidative stress, are increased by substances derived from plants [20]. By directly scavenging free radicals and aiding in the regeneration of other antioxidants, GSH promotes mucosal protection and repair [20]. In ulcer situations, where oxidative stress causes its depletion, restoring GSH levels is very crucial.
The suppression of signaling pathways mediated by oxidative stress is another crucial mechanism. Transcription factors like nuclear factor-kappa B (NF-κB), which controls the synthesis of pro-inflammatory cytokines and causes mucosal inflammation, are activated by reactive oxygen species [21]. Antioxidants produced from plants inhibit NF-κB activity, which lowers inflammation and accelerates ulcer healing [21].Moreover, antioxidant phytochemicals aid in maintaining the availability of nitric oxide (NO) by stopping reactive oxygen species from degrading it [19]. The maintenance of gastric mucosal blood flow, the stimulation of mucus secretion, and the promotion of angiogenesis—all of which are critical for the healing of ulcers—are all made possible by nitric oxide [19]. Therefore, the gastroprotective impact of plant-derived medicines is greatly enhanced by the retention of NO. Plant extracts with high antioxidant capacity have been shown in numerous studies to dramatically lower ulcer index, stomach lesions, and oxidative indicators like malondialdehyde (MDA) while also raising antioxidant enzyme levels [18]. In addition to preventing mucosal damage, this multi-targeted antioxidant effect speeds up the healing process.
In conclusion, free radical scavenging, lipid peroxidation suppression, endogenous antioxidant system enhancement, redox-sensitive signaling pathway regulation, and nitric oxide level preservation are all part of the antioxidant mechanism of plant-derived gastroprotective compounds. These combined effects demonstrate the therapeutic potential of plant-based antioxidants in the treatment of peptic ulcer disease and play a critical role in protecting the stomach mucosa.
3.2 Anti-secretory Activity
Another maily contributing factor that plays a role in the development of peptic ulcer disease (PUD) is the hypersecretion of gastric acid which leads to the disruption of the integrity of the gastric mucosa and facilitates the development of ulcers [22]. Hence, prevention of the gastric acid secretion is an important treatment goal in PUD management. Plant-gastroprotective agents are potent antisecretory agents that regulate different physiological and molecular processes in the acid secretion.The main processes of anti-secretory activity include gastric proton pump (H + /K + -ATPase) inhibition, which is in charge of the ultimate phase of secretion of acid in the parietal cells [23]. A number of phytochemicals, especially flavonoids and terpenoids, have been demonstrated to inhibit this enzyme and, as such, suppressing production of gastric acid and offer mucosal protection [24]. This action can be compared to proton pump inhibitors, but much weaker action of plant-based comounds and less side effects are observed.Comounds of plant origin block histamine mediated acid secretions via histamine H2 receptors or by blocking histidine decarboxylase, the enzyme that synthesizes histamines [25]. Histamine is important in the stimulation of gastric acid secretion by activating adenylate cyclase and elevation of cyclic AMP activity in parietal cells. Modulating this pathway, plant extracts can be useful in decreasing the quantity of acidic secretions and in promoting the repair of ulcers.Moreover, the anti-secretory effects are also attained by regulating the gastrin and acetylcholine pathways [22]. Some constituents of the plants decrease levels of gastrin secretion or block muscarinic receptors, dysinhibiting cholinergic stimulation of acid secretion. This is a multi-targeted intervention that improves their therapeutic effect in the regulation of gastrointestinal acid.The other mechanism is the augmentation of native endogenous synthesis of prostaglandin (mainly the prostaglandin E2, PGE2), which has a dual effect of gastric acid secretion suppression and mucosal defense [26]. The prostaglandins do not only inhibit the production of acid by lowering the level of cyclic AMP in the parietal cells, they also cause the mucus and bicarbonate secretion. Agents derived by plants which raise the levels of prostaglands thus, promote anti-secretory and cytoprotective effects.Moreover, it is demonstrated that extracts of plants control intracellular signaling pathways linked to secreting acids such as calcium signaling and protein kinase activation [24]. Through these pathways, modulated by phytochemicals, the activity of the parietal cell is decreased, and the excess production of acid is prevented. It has also been shown that the anti-secretory activity of plant compounds has an indirect contribution through antioxidant activity of plant compounds which protects the parietal cells against oxidative damage [23].Pylorus ligation experimental works and ethanol induced ulcer experimental works have indicated that plant extracts have a significant effect on reducing the gastric volume, free acidity and total acidity and increasing gastric pH [27]. These results prove the strong anti-secretory effect of plant-derived agents and their capacity to recycle gastric homeostasis.
Overall, the plant-derived gastroprotective agents process of the secretory system consists of inhibition of the H +/K + -ATPase pump, hindering of the histamine, gastrin, and acetylcholine systems, the promotion of the production of prostaglandins and the regulation of intracellular signaling. All these measures are effective in lowering the secretion of gastric acid and aid in the prevention and recovery of peptic ulcers.
Cytoprotective Mechanism
The term cytoprotection describes the capacity of gastric mucosa to endure damage caused by harmful agents (e.g. gastric acid, pepsin, Helicobacter pylori, non-steroidal anti-inflammatory drugs, etc.) and to ensure integrity [28]. Gastroprotective agents that are vegetable sourced are essential in supporting the defense mechanism of the mucosa to inhibit the development of ulcers and enhance recovery.The mucus and bicarbonate secretion, which creates a layer to protect the gastric epithelium, is one of the main cytoprotective mechanisms [29]. The gastric acid is neutralized by this mucus-bicarbonate layer and the hydrogen ions are not allowed to diffuse into the mucosal lining. Some phytochemicals, especially flavonoids and polysaccharides, further improve the growth and quality of such a protective coating and, therefore, reinforce the mucosal defense [30].The other significant process is the increase of the production of prostaglandins, particularly the prostaglandin, E2 (PGE2) that is crucial in ensuring the integrity of the gastric mucosa [31]. Prostagladins favor mucus and bicarbonate release, enhance mucosal blood circulation and aid in epithelial cell healing. The prostaglandin-stimulating plant-derived compounds play an important role in cytoprotection and healing of ulcers.The proper blood circulation of the mucosa is necessary to provide blood with oxygen and nutrients and to eliminate toxic metabolites [29]. Plant-based agents increase gastric microcirculation by stimulating the generation of nitric oxide (NO) that stimulates the development of vasodilation and the supply of blood to the mucosa [32]. This process speeds up the healing of ulcers, tissue repair and tissue regeneration.Cytoprotection also requires epithelial cell restitution and regeneration. Compounds derived in plants facilitate fast migration of epithelial cells to repair damaged regions and facilitate cell proliferation by activating growth factors and signaling pathways [33]. The process can be used to recover the integrity of the gastric mucosal barrier and avoid additional damage.Besides this, cytoprotective agents stabilize the membranes of the cells and inhibit cellular injury by the irritants and oxidative stress [30]. Preserving the integrity of the membrane, these agents decrease the permeability to the toxic substances and the intracellular constituents are not damaged. The effect of stabilization is of special significance in the prevention of NSAID-mucosal damage.The other important process is the tight junction proteins modulation that controls paracellular permeability in the gastric epithelium [34]. Plant based compounds allow maintenance of the integrity and functioning of tight junctions, thus avoiding passage of acid and other deleveraging agents to deeper mucosal layers.Moreover, anti-apoptotic effect of gastroprotective agents of plant origin has been demonstrated by their ability to control the cellular signaling pathways that trigger the programmed cell death [33]. These agents are involved in the preservation of the mucosal integrity and in improving the healing process by inhibiting apoptosis and improving the survival of the cells.It has been proved by experimental research that plant extracts have a critical input on mucus content elevation, mucosal thickness and severity of ulcers in different ulcer models [30]. These results emphasize the significance of cytoprotective effects on the gastroprotective effects of the plant-derived agents in general.Overall, the plant-derived gastroprotective agents have a mechanism of cytoprotection that includes stimulation of the mucus-bicarbonate secretion, stimulation of prostaglandin production, strengthening of the mucosal blood flow, epithelial regeneration, cell membrane stabilization, tight junction integrity, and apoptosis inhibition. This is a combination of multifunctional actions that support the healing of ulcers and protect the gastric mucosa.
Nitric Oxide (NO) Pathway
NO is an essential endogenous mediator that is implicated in gastric mucosal integrity as well as a role in the pathophysiology and healing of peptic ulcer disease (PUD) [35]. It is produced by nitric oxide synthase (NOS) enzymes such as endothelial NOS (eNOS), neuronal NOS (nNOS) and inducible NOS (iNOS) which have particular roles to play in maintaining the gastric mucosal homeostasis [36].In physiological conditions, constitutive nitric oxide (produced by eNOS and nNOS) has protective actions on the gastric mucosa by increasing mucosal blood flow, vasodilation, and mucus and bicarbonate secretions [35]. These measures serve to preserve the integrity of the mucosal barrier and repair of damaged tissue very quickly. Heightened mucosal blood circulation guarantees sufficient oxygen and nutrition provision as well as the elimination of toxic metabolites thus speeding up healing of ulcers [37].Gastroprotective agents which are of plant origin have been demonstrated to stimulate NO formation, mainly by increasing the eNOS activity or by increasing the accessibility of L-arginine [38]. This causes a better gastrointestinal microcirculation and cytoprotection. Phytochemicals including flavonoids and polyphenols are also reported to stimulate the NO production and protect endothelial activities, thus adding to their gastroprotective effects [38].Besides dilation effect, NO also regulates the adhesion and infiltration of leucocytes in the gastric mucosa [36]. NO prevents inflammation and additional mucosal damage by blocking interactions between leukocytes and their endothelium. This anti-inflammatory property specifically plays a role in the states related to Helicobacter pylori infection and NSAID-related damage where excessive inflammatory reaction plays a role in ulcer development [37].But the contribution of NO to PUD is twofold. Although constitutive NO is protective, excess production of NO through the inducible nitric oxide synthase (iNOS) during inflammation may be disadvantageous [39]. Excess production of NO is neutralized by superoxide radicals to produce peroxynitrite (ONOO - ), an extremely reactive and cytotoxic compound that leads to lipid peroxidation, protein, and DNA damage [39]. This manifests itself in oxidative stress and increases mucosal injury.Furthermore, most phytochemicals have antioxidant qualities that counteract the effects of reactive nitrogen species and prevent damage by peroxynitrite-mediated reaction [40]. Additionally, NO is essential in triggering angiogenesis and other functions like epithelial cell proliferation that are vital in healing an ulcer [37]. Plant compounds also contribute to the balance of protective and harmful effects of NO by solely promoting constitutive activity of NOS and suppressing iNOS expression.By promoting the growth of new blood vessels and tissue regeneration, NO aids in the restoration of the stomach mucosa. Agents that increase NO signaling in plants thus improve the wound healing process and the overall gastric functionality.
It has been experimentally proven that blocking NO production results in the mushrooming vulnerability to gastric ulcers and boosting NO levels is critical towards avoiding mucosal damage [35]. These results reveal the essential role of NO in gastroprotection and justify the therapeutic value of such agents as plant-derived with the goal to act on this pathway.In conclusion, the pathophysiology and repair of peptic ulcer disease are both significantly influenced by the nitric oxide pathway. enhanced constitutive production of NO, enhanced mucosal vascularity, avoidance of inflammation, modification of oxidative stress, and cell regeneration are the ways that plant-based gastroprotectants work. These precise measurements show how important NO is as one of the main therapeutic agents in the treatment of ulcers.
Prostaglandin-Mediated Protection
Prostaglandins (PGs), specifically, prostaglandin E2 (PGE2) and prostacyclin (PGI2) are the major mediators of gastric mucosal integrity as well as the major mediators of the defense against peptic ulcer disease (PUD) [41]. These lipid mediators are derived out of the arachidonic acid through the cyclooxygenase (COX) pathway and have various protective effects on the gastric mucosa [42].Among the main gastroprotective activities of prostaglandins is the stimulation of mucus and bicarbonate secretion that combined create an effect of protection over the gastric epithelium [43]. This shields against back-diffusion of hydrogen ions and shields epithelial-cells against damage caused by acid and pepsin. Gastroprotective agents of plant origin help improve the production of prostaglandins which consequently augments this defence line [44].The secretion of gastric acid is also regulated by the presence of prostaglandins that inhibit the activities of parietal cells by depleting the intracellular calcium of cyclic AMP which in turn neutralizes the stimulatory action of histamine and gastrin [42]. It is this twin effect, reducing acid secretion and increasing mucosal protection, that is necessary in preventing and curing ulcers.The other important role that is played by prostaglandins is the maintenance of proper mucosal blood flow [43]. Prostaglandins control the adequate supply of oxygen and nutrients to the gastric mucosa, the elimination of toxic metabolites through vasodilation. Optimized mucosal perfusion facilitates quick tissue repair and regeneration, and agents of plant origin that induce the production of prostaglandins have significant effects on the same [45].Prostaglandins also facilitate epithelial cell restitution as well as proliferation which is necessary to repair damaged mucosa [46]. They induce epithelial cell migration to close fissure locations and increase cell fission, and hence, re-establish the mucosal integrity. This is especially regenerative in cases of chronic ulcers.The prevention of the synthesis of prostaglandins is a significant pathway in the NSAID-induced gastric injury. NSAIDs block COX enzymes, especially COX-1, which reduces the level of prostaglandin and mucosal defense [42]. This leads to less release of mucus and bicarbonates, less blood circulation and less protection against acid-induced destruction. Plant based gastroprotective substances are able to overcome this effect by replacing the depleted gastrointestinal mucosa by the use of prostaglandins and protection [44].Also, the anti-inflammatory action of prostaglandins is by regulating the production of cytokines and by preventing the activation of leukocytes [45]. This decreases inflammation caused mucosal damage and heals. Plant-based compounds which amplify the prostaglandin pathways thus offer cytoprotective and anti-inflammatory effects.It has been demonstrated through experimental studies that plant extracts with the ability to elevate the levels of prostaglands have significant reducing effects on ulcer index, gastric lesion, and mucosal damage in the various models of ulcers [44]. The present findings highlight the significance of pathways of effects mediated by prostaglands in gastroprotective effects of medicinal plants.To conclude, the mechanisms of the prostaglandin-mediated protection include the stimulation of the secretion of mucus and bicarbonate, the inhibition of the secretion of gastic acid, the assurance of the mucosal blood flow, the encouragement of the regeneration of epithelial layer, and the regulation of inflammation. Plant-based gastroprotective factors complement these peptic ulcer disease protective mechanisms that depend on prostaglands, thus providing effective gastroprotection.
Anti-Helicobacter pylori Activity
The infection by Helicobacter pylori is one of the key etiological agents in the pathophysiology of peptic ulcer disease (PUD) as it leads to the development of chronic gastritis, mucosal inflammation, and the ulcer formation [47]. The bacterium inhabits gastric mucosa and gets adapted to the acidic environment through urease production, which is transformed into ammonia, and neutralizes gastric acid [48]. This resistance mechanism, as well as virulence factors cytotoxin-associated gene A (CagA) and vacuolating cytotoxin A (VacA), causes epithelium damage and chronic inflammation [49].Traditionally H. pylori infection is treated using a combination of antibiotics and proton pump inhibitors but the rise in antibiotic resistance and the occurrence of increasing problems with the treatment has prompted the need to seek alternative methods of therapy [50]. In this regard, gastroprotective agents of plant origin have been of great interest as they have antimicrobial effects and can target various pathways that mediate the pathogenesis of H. pylori [51].The direct inhibition of bacterial growth is one of the main anti-H. pylori activities of plant-derived compounds. Some phytochemicals, including flavonoids, alkaloids, tannins, and essential oils, have shown to have a strong bactericidal/bacteriostatic effect against H. pylori [52]. These substances impair the membranes of bacteria, change their permeability and disrupt vital metabolic functions and, thus, cause the death of bacteria.The other significant mechanism is inhibition of urease activity which is one of the enzymes necessary to make H. pylori survive in the gastric environment where it is acidic [48]. A number of plant compounds have been supported to prevent urease, hence, limiting the capability of the bacterium to counteract gastric acid and endure under the mucosal layer [53]. This process seriously affects the colonization and persistence of bacteria.Plant-based agents also disrupt the adherence of H. pylori to gastric epithelial cells which is critical to colonization and infection [51]. These compounds inhibit bacterial colonization by stopping their attachment and prevent mucosal injury. Also, some phytochemicals suppress expression of virulence factors like CagA and VacA and therefore reduce pathogenicity of bacteria [49].Another major effect that has led to the anti-H. pylori effects of plant-derived compounds is the anti-inflammatory action. H. pylori infection triggers the formation of the pro-inflammatory cytokines including interleukin-8 (IL-8), tumor necrosis factor-alpha (TNF-a), and interleukin-1 beta (IL-1 ).54. Plant-based agents inhibit these inflammatory reactions by altering the activities of several signaling pathways like nuclear factor-kappa b (NF- 0KB) and decrease inflammation and enhance mucosal recovery.Moreover, the antioxidant activity of plant-derived compounds supplementary role in the counteraction of oxidative stress caused by H. pylori occurs [52]. These agents prevent the damage of gastric epithelial cells by scavenging the reactive oxygen species and reducing the lipid peroxidation that is linked to gastric ulcers and protecting the mucosal defense mechanism.It has been shown that plant extracts can reduce colonization of H. pylori, growth of bacteria, and gastric histopathology significantly [51] in a number of in vitro and in vivo studies. Plant based compounds have been observed to be synergistic with traditional antibiotics, improving the effectiveness of treatment and minimizing resistance development as well [50].In conclusion, plant-derived gastroprotective agents have anti-Helicobacter pylori activity which is achieved by direct antibacterial effects, anti-urease activity, anti-adhesive effect, anti-virulence factor, anti-inflammatory act, and antioxidant action. These complex processes underscore the possibility of plant-based therapies as either the alternative or supplement to the treatment of the H. pylori-induced peptic ulcer disease.
|
Mechanism |
Molecular Targets / Pathways |
Major Phytochemicals |
Pharmacological Actions |
Therapeutic Outcome in PUD |
|
Antioxidant Activity |
Reactive oxygen species (ROS), lipid peroxidation, antioxidant enzymes (SOD, CAT, GPx), glutathione (GSH), NF-κB pathway |
Flavonoids, phenolic compounds, tannins, terpenoids |
Free radical scavenging, inhibition of oxidative stress, enhancement of endogenous antioxidant defense |
Prevention of mucosal damage and acceleration of ulcer healing |
|
Anti-secretory Activity |
Gastric H?/K?-ATPase, histamine (H? receptors), gastrin, acetylcholine pathways, prostaglandin synthesis |
Flavonoids, alkaloids, terpenoids |
Reduction of gastric acid secretion, inhibition of proton pump activity, modulation of secretory pathways |
Decrease in gastric acidity and ulcer formation |
|
Cytoprotective Mechanism |
Mucus-bicarbonate barrier, prostaglandins (PGE?), mucosal blood flow, epithelial regeneration, tight junction proteins |
Flavonoids, polysaccharides |
Enhancement of mucosal defense, stimulation of mucus and bicarbonate secretion, promotion of tissue repair |
Strengthening of mucosal integrity and ulcer healing |
|
Nitric Oxide (NO) Pathway |
Endothelial nitric oxide synthase (eNOS), inducible nitric oxide synthase (iNOS), gastric microcirculation, angiogenesis |
Polyphenols, flavonoids |
Modulation of nitric oxide production, improvement of blood flow, inhibition of inflammation |
Enhanced mucosal protection and faster healing |
|
Prostaglandin-Mediated Protection |
Cyclooxygenase (COX) pathway, prostaglandins (PGE?, PGI?), gastric acid secretion, mucosal blood flow |
Flavonoids, terpenoids |
Stimulation of prostaglandin synthesis, inhibition of acid secretion, enhancement of mucus production |
Protection against NSAID-induced ulcers and mucosal injury |
|
Anti-Helicobacter pylori Activity |
Urease enzyme, bacterial adhesion, virulence factors (CagA, VacA), inflammatory cytokines |
Alkaloids, flavonoids, tannins, essential oils |
Antibacterial activity, inhibition of urease, prevention of bacterial colonization, anti-inflammatory effects |
Reduction of infection, inflammation, and ulcer recurrence |
4.1 Pharmacological Evaluation Models
4.1 Experimental Ulcer Models
Experimental ulcer models are very important in the pharmacological testing of plant-derived gastroprotective agents as they replicate various pathogenic processes that cause peptic ulcer disease. Such models enable researchers to determine the effectiveness of phytochemicals in preventing gastrointestinal mucosal damage that is induced by oxidative stress, hypersecretion of acid, inflammation, and microbial infection [55].
a. Gastric ulcer in Ethanol Model.
One of the most common ways of studying the acute injury to the mucosa of the gastric epithelium is through the ethanol induced ulcer model. The direct effects of ethanol on the gastric epithelium are the disruption of the gastric epithelial barrier, vascular permeability, and the production of reactive oxygen species (ROS), which results in lipid peroxidation and cellular necrosis [56]. This is a model that is specifically applicable in the determination of antioxidant and cytoprotective effects of plant extracts. The decrease in the ulcer index was also significant and histological architecture was improved, which shows gastroprotection.
b. NSAID-Induced Ulcer Model
Nonsteroidal anti-inflammatory drugs (NSAIDs), including indomethacin and aspirin, cause gastric ulcers because of inhibition of cyclooxygenase (COX) enzymes and, in turn, reduced prostaglandin production. Prostaglandins play a vital role in ensuring the integrity of the mucosa by secretion of mucus and bicarbonate, and adequate blood circulation [57]. This model is similar to clinical ulcer-related conditions that are induced by the chronic use of NSAIDs and is extensively used to determine the protective effect of plant-derived compounds through its relation to prostaglandin.
c. Pylorus Ligation Model
Pylorus ligation model is the model mainly employed in testing the gastric secretory parameters. In this procedure the pyloric end of the stomach is ligated to cause the build-up of gastric acid and pepsin, which cause the gastric mucosa to autodigest, and develop an ulcer [58]. The model is especially useful to determine the antisecretory activity, such as gastric volume, acidity, and pepsin level. Plant extracts with deacidifying action or neutralizing gastric contents have a high therapeutic potential in this model.
d. Stress-Induced Ulcer Model
The ulcer models of stress are stress models induced by stresses as the cold-restraint stress, which is a physiological model of stress contributing to the development of ulcers. Stress raises the secretion of gastric acid, diminishes blood flow through the mucosal area and improves the damage of oxidative activity by the release of stress hormones and free radicals [5]. They can be applied in assessing the adaptogenic and anti stress effects of plant-derived agents, neuroendocrine modulation.
e. Chronic Ulcer Model induced by Acetic Acid.
The ulcer model that is most frequently studied is the one that is caused by acetic acid as a model of chronic ulcers and healing. When acetic acid is applied to the gastric mucosa, deep, well-circumscribed ulcers are caused which are similar to human peptic ulcers in their pathology and healing processes [59]. The model is that which is most helpful in measuring the healing of ulcers, tissue recovery, angiogenesis, and mucosal repair. This model considers plant extracts, which improve the process of epithelial regeneration and collagen production.
f. Ischemia- Reperfusion Injury Model.
In this model, temporary oxidative stress and inflammation are caused by the temporary restriction of blood flow to gastrointestinal tissue and its reperfusion. The reinstatement of blood flow leads to the generation of excessive ROS leading to severe mucosal damage [60]. It can be applied to investigate the antioxidant and anti-inflammatory properties of compounds of plant origin and their effectiveness to prevent ischemic injuries.
g. Helicobacter pylori-Induced Ulcer Model.
To determine the anti-microbial and anti-inflammatory effects of plant extracts, the models are used to test the effects of the antimicrobial and anti-inflammatory agents of Helicobacter pylori. Chronic inflammation, gastric secretion of acid, and mucosal damage are caused by infection [61]. These models are technically complex but they offer a good insight into the capacity of the phytochemicals to inhibit the growth of bacteria, prevent urease activity and altering the host immune responses.
4.2 Evaluation Parameters
Experimental ulcer models are an essential instrument in assessing the pharmacological effectiveness of plant-derived gastroprotective agents as well as in explaining their mechanism of action. These paradigms reproduce various pathogenic pathways that play a role in peptic ulcer disease, such as oxidative stress, inflammation, hypersecretion of acid, and infection by microbes, thus a solid platform on which preclinical evaluation can be done [62].
a. Gastric Ulcer Model caused by Ethanol.
The ulcer model caused by ethanol is also popular in the research of acute gastric mucosal injury. Ethanol results into rapid destabilization of the gastric mucosal barrier, increased vascular permeability, cellular exfoliation and the formation of reactive oxygen species (ROS), which causes lipid peroxidation and tissue necrosis [63]. The model is especially effective in determining the antioxidant and cytoprotective effectiveness of plant extracts. Protective activity is indicated by a decrease in the index of ulcers and the increase in the level of histopathology.
b. NSAID-Induced Ulcer Model
Indomethacin and aspirin are nonsteroidal anti-inflammatory drugs (NSAIDs), which cause gastric ulcers by blocking the cyclooxygenase (COX) enzymes and decreasing the production of prostaglandins. This results in reduction of mucus and bicarbonate release and mucosal blood circulation [64]. This model is highly similar to clinical conditions that lead to gastric injury induced by NSAID and can be employed to assess the gastroprotective action of phytochemicals mediated by prostaglands.
c. Pylorus Ligation Model
Using a pylorus ligation model, the accumulated gastric juice is used to study it and its effects on gastric acid secretion and ulcer formation. Pyloric ligation causes the growth of gastric volume, acidic, and pepsin, thereby causing autodigestion of the mucosa [65]. The model is useful in assessing antisecretory activity and the capacity of plant extracts to lower acid secretions and high mucosal defenses.
d. Stress-Induced Ulcer Model
Physiological models of ulcerogenesis Stress-induced ulcer models: cold-restraint stress Stress models: Stress is a physiological condition that leads to the development of ulcers. Stress raises the level of gastric acid secretion, slows down mucosal blood flow and facilitates the occurrence of oxidative damage by releasing stress hormones and free radicals [66]. Plant-derived agents These models can be used to determine the anti-stress and adaptogenic properties of plant-derived agents.
e. The model of chronic ulcer induced by Acetic Acid.
The ulcer model that is normally used to research on chronic ulcers and healing processes is the acetic acid-induced ulcer model. When acetic acid is used, deep well-demarcated ulcers are produced which are morphologically and histologically similar to human peptic ulcers and are healed in a similar manner [67]. The model is quite applicable in the assessment of healing of ulcers, tissue regeneration, angiogenesis, and mucosal repair.
f. Ischemia-Reperfusion Injury Model.
This paradigm implies the intermittent blockage of gastric blood flow and its re-entry, which causes an overproduction of ROS and pathogenic mediators. The resultant oxidative stress is damaging mucosa greatly [68]. It can be used in the investigation of the antioxidant and anti-inflammatory properties of plant-derived compounds in gastric tissue protection.
g. Ulcer model induced by Helicobacter pylori.
Plant extracts are tested on helicobacter pylori-associated ulcer models to determine anti-microbial and anti-inflammatory characteristics of the extracts. Chronic gastritis and acid secretion, mucosal damage are caused by infection [69]. Such models have been used to determine the potential of phytochemicals to prevent bacterial growth, decrease urease activity and alter host immune responses.
5. Comparative Efficacy of Plant Extracts and Standard Drugs
The relative analysis between plant-based gastroprotective agent and conventional anti-ulcer drugs has been a growing concern because safer and more effective therapeutic agents are required. The traditional medications include proton pump inhibitors (PPIs), H 2-receptor antagonists, and antibiotics that have a narrower spectrum of action by inhibiting secretion of gastric acid or eliminating Helicobacter pylori, but plant extracts show a wider range of action by acting on a variety of different pathways that mediate ulcer pathology [68].Other experimental research authors have shown that the anti-ulcer effect of plant extracts is equivalent to standard drugs in preclinical test models. As an example, the ulcer index and the formation of gastric lesions were reduced significantly by the flavonoid-enriched plant extracts in comparison to omeprazole through the strengthening of the mucosal defense system and decreasing the oxidative stress load [69]. These are mediated by production of higher levels of mucus, stimulation of prostaglandin synthesis and by scavenging of free radicals.Besides similar efficacy, agents of plant origin have multi-target effects, such as antioxidant and anti-inflammatory, cytoprotective, and antimicrobial effects. Phytochemicals are capable of regulating a number of parallel processes including inhibition of lipid peroxidation, inhibition of inflammatory mediators and enhancements of gastric mucosal status unlike the normal drugs that inhibit acid secretion mainly [70].The second benefit that is realized in comparative studies is the reduced cases of adverse effects caused by plant extracts. Prolonged use of PPIs has also been associated with complications like nutrient deficiencies, rebound acid hypersecretion, and high risk of infections, and plant-based therapies are usually linked to high tolerability and safety rates [71].Nevertheless, regardless of positive outcomes, plant extracts can be characterized by inconsistent efficacy because of variations in composition, mode of extraction and un-standardization. Conversely, generic medications offer predictable drug pharmacokinetic and therapeutic effects [72]. Moreover, the plant-derived agents can take a longer time to take effect than synthetic drugs, thereby limiting their application in cases of acute conditions.The use of combination approaches has demonstrated possibilities of enhancing therapeutic outcomes. Research shows that plant extracts used concomitantly with conventional drug could positively affect the healing of ulcers, enhance the success rates of H. pylori treatment, and decrease the toxicity caused by drugs due to the synergy effect [73].Generally, although there is an equivalent effectiveness of plant-based gastroprotective agents and better safety in most situations, additional clinical trials and standardization are necessary to determine their use as the first or second-line interventions in the management of peptic ulcers disease [74].
6. Advantages of Plant-Derived Gastroprotective Agents
Plant-derived gastroprotective agents have received an extensive level of interest as a promising alternative or complement to traditional therapies in the treatment of peptic ulcer disease (PUD) due to their various pharmacological advantages and superior safety profiles [75]. In contrast to the synthetic drugs, which usually affect one specific pathway, plant-based agents are multi-targeted, i.e., they affect multiple pathogenic mechanisms that cause the development and development of ulcers [76].The multifactorial action of plant-derived agents is among the most significant ones, which are antioxidant activity, anti-secretory, cytoprotective, anti-inflammatory, and anti-Helicobacter pylori [77]. This wide range of activity can enable them to regulate at once various pathways including oxidative stress, gastric acid secretion, mucosal defense and microbial infection resulting in increased therapeutic effect [78].They also have another significant benefit, which is their lesser adverse effects than traditional medications like proton pump inhibitors (PPIs) and non-steroidal anti-inflammatory drugs (NSAIDs) [79]. Synthetic anti-ulcer medications also have such complications as nutrient malabsorption, gastrointestinal disorders, and heightened susceptibility to infections in case of long-term use, and the use of plant-derived compounds is likely to be well tolerated by their natural origin and biocompatibility [79].Gastroprotective agents of vegetal origin exhibit synergism effects as well because of existence of various bioactive compounds in one extract [76]. These phytochemicals may act synergistically in order to promote therapeutic effects, increase bioavailability and decrease the tendency to develop drug resistance especially against the H. pylori infection [80]. Such synergism is what makes them effective even on low doses.Another significant advantage of this procedure is their ability to strengthen endogenous defensive mechanisms rather than only blocking the aggressive factors [77]. The stomach mucosa's innate defensive mechanism is strengthened by plant chemicals that stimulate mucus and bicarbonate, increase prostaglandin production, improve blood flow to the mucosa, and promote epithelial proliferation [81].
Additionally, antioxidants found in plants are crucial for preventing oxidative stress damage to the stomach mucosa [78]. By scavenging reactive oxygen species and boosting endogenous antioxidant activity, these medicines inhibit lipid peroxidation and the cellular damage that results from lipid peroxidation, which are important pathophysiological pathways of ulcer etiology.Another benefit that is particularly felt in underdeveloped economies, where access to modern healthcare may be limited, is the price and accessibility of medicinal herbs [75]. Traditionally, gastrointestinal and other illnesses have been treated using plant-based remedies, which are a good source of a variety of therapeutic substances that are related to ethnopharmacology [76]. Furthermore, gastroprotective drugs derived from plants have shown promise in avoiding ulcer recurrence, a genuine shortcoming of traditional treatment [80]. Long-term therapy outcomes and improved patient outcomes result from their ability to respond to the underlying cause, such as oxidative stress, inflammation, and microbial infection.Despite these advantages, their widespread clinical usage is nevertheless hampered by issues with phytochemical composition variability, lack of standardization, and inadequate clinical data [81]. However, these limitations will be removed by ongoing research and technological advancements in the production of phytopharmaceuticals, which will enable the incorporation of plant-derived compounds into modern treatment modalities.
In conclusion, there are a number of advantages to plant-based gastroprotective chemicals, including multi-target, reduced adverse reactions, synergism, support of natural defenses, antioxidant properties, accessibility, and potential long-term therapeutic use. These characteristics show that they have a lot of promise as effective and less dangerous alternatives for the treatment of peptic ulcer disease.
7 Limitations and Challenges
There are several obstacles to the widespread clinical use and adoption of plant-derived gastroprotectants in modern medical practice, despite their potential gastroprotective action in the treatment of peptic ulcer disease (PUD) [82]. The majority of these concerns are related to clinical validation, quality control, standardization, and regulatory approval.
One of the biggest limitations is the lack of standardization in plant extracts, which results in inconsistent phytochemical composition and therapeutic benefits [83]. The location, season, kind of plant extract, and extraction technique can all have a significant impact on the bioactive chemicals found in medicinal plants. Maintaining consistent pharmacological effects and repeatability of results is challenging due to this interchangeability.The lack of enough clinical evidence on the effectiveness and efficacy of plant-derived gastroprotective agents is also another major challenge [84]. Whereas several in vitro and in vivo studies have shown their positive effects, the number of designed randomized controlled trials in humans is scarce. This weakness in clinical evidence limits their use in evidence-based practice and medicine.There is also the problem of dose standardization and pharmacokinetics which is also a significant challenge [85]. The use of plant extracts in place of the traditional drugs also offers some challenges since the extracts usually present complex combinations of compounds, meaning that it is hard to establish the optimal dosage, bioavailability, metabolism and also elimination properties. Absorption and distribution variability also makes their therapeutic use more difficult.Another weakness is safety issues, and possible toxicity, especially with the use of plant-derived agents without a proper assessment [82]. Even though medicinal plants are regarded to be safe, others can have adverse effects, herb-drug interactions or be toxic at high doses or when combined with other drugs. The absence of complete toxicological research also contributes to this issue.Phytochemical composition is complex and this is a strength and weakness of phytochemical composition. Although several bioactive constituents can be involved in synergistic effects, they also cause the identification of active principles and mechanisms of action to be complicated [83]. This complication complicates the process of isolating, characterizing and standardizing single compounds to be used therapeuticallyThe other severe constraint is the regulatory issues that are linked to herbal medicines [86]. Rules and regulations regarding plant-based products differ significantly, and most of the herbal medication does not pass the same scrutiny as traditional drugs. This leads to discrepancies in quality, safety and efficacy levels.Plant-derived gastroprotective agents also have problems of stability and formulation [85]. In most cases, phytochemicals are unstable and might degrade during processing, storage or formulation resulting into low therapeutic effects. The preparation of appropriate dosage forms that are stable enough, in terms of bioavailability, is a challenge.Also, there exists the absence of large-scale industrialized production and commercialization of standardized plant-based gastroprotective preparations [84]. The lack of sufficient investment into research and development, as well as technical issues in the extraction and formulation prevent their application in marketable products.Lastly, there are also issues of intellectual property and ethical issues concerning the traditional knowledge and bioprospecting [86]. The concerns like patenting of natural products as well as fair distribution of returns to the indigenous communities must also be addressed so as to have sustainable and ethical use of the medicinal plants.Overall, although gastroprotective agent derived by plants have sufficient therapeutic benefits, their use is hampered by a series of problems including unstandardization, inadequate clinical data, safety, regulatory, formulation, and inconsistent phytochemical composition. These issues can be tackled with the help of intensive scientific research, standardization, and harmonization of regulations which ensures their effective incorporation into the contemporary healthcare systems.
8. Future Therapeutic Directions
The integration of traditional knowledge with contemporary scientific advancements will determine the future of plant-derived gastroprotective medicines in the treatment of peptic ulcer disease. While some of these tactics have demonstrated promising preclinical outcomes, several novel techniques are being developed to enhance their therapeutic potential and clinical appropriateness.
One of the primary future directions is the isolation and standardization of bioactive substances. The identification and purification of certain phytoconstitutions with gastroprotective properties will improve the quality, dose, and reproducibility. To ensure consistency in herbal formulations, sophisticated analytical techniques like mass spectrometry and high-performance liquid chromatography (HPLC) are also being used.The utilization of drug delivery systems created by nanotechnology is a noteworthy advancement. Nanocarriers that can improve the solubility, stability, and bioavailability of plant-based substances include liposomes, nanoparticles, and nanoemulsions. Additionally, these systems make it easier to administer medication to the stomach tissues and manage the release of medications that are beneficial but have little adverse effects on the body.he other promising method is the creation of combination therapy. Plant-derived compounds can be used in combination with traditional anti-ulcer agents, including proton pump inhibitors or antibiotics, and be involved in synergistic effects, enhancing the effectiveness of the Helicobacter pylori eradication, and reducing the incidence of drug resistance. Also, the concomitant presence of several phytochemicals in the extract as a whole might increase the total effect because of their complementary activity.The field is predicted to be revolutionized by the development of omics-based technologies (genomics, proteomics and metabolomics). The technologies have the capacity to aid in the identification of new molecular targets, clarify the action mechanism, and the creation of personalized treatment based on patient-specific profiles.There is also an emerging evidence of the importance of the gut microbiome to gastric health. The aim of future treatment direction is to regulate gut microbiota with the help of plant-derived pre- and probiotics to boost mucosal immunity and suppress pathogenic microbes including H. pylori. This is a comprehensive and preventive management of ulcers.Furthermore, largescale randomized controlled trials that must be clinically verified must be used to bring experimental discoveries into clinical practice. To gain acceptance in mainstream medicine, it will be crucial to provide safety, efficacy, and ideal dose schedules.
In order to ensure the quality, safety, and consistency of herbal goods, international standardization models and regulatory reforms are also required. The marketing and expansion of plant-based treatments will be aided by the strengthening of these systems.
Lastly, innovation in formulation, delivery methods, molecular targeting, and clinical validation will be crucial to the future of therapy. These advancements have the potential to transform plant-derived gastroprotective medicines into viable, evidence-based substitutes or potential treatments for peptic ulcer disease.
CONCLUSION
Gastric acid, Helicobacter pylori, NSAIDs, oxidative stress, inflammatory mediators, and the defensive response of the gastric mucosa interact in a complex way to cause peptic ulcer disease (PUD), a health problem that affects people all over the world.According to this research, plant-based gastroprotective drugs are promising multimodal therapeutic options since they target several pathways that lead to ulcer development. Antioxidant effect, inhibition of stomach acid secretion, cytoprotective substances such as prostaglandins and mucus, regulation of the nitric oxide pathway, and antibacterial activity against H. pylori are some of the ways these medicines work. These multi-targeted approaches offer a significant benefit over conventional treatments, which primarily focus on either bacterial eradication or acid suppression.According to comparative studies, plant-based compounds are just as effective as conventional anti-ulcer medications. They also have a higher safety profile, fewer side effects, and synergistic interactions amongst bioactive molecules. Their therapeutic value is further highlighted by their capacity to bolster innate defense and stop ulcers from recurring.
Despite these advantages, a number of obstacles, including a lack of standardization, inconsistent phytochemical content, insufficient clinical validation, regulatory concerns, and formulation-related issues, limit their clinical application. To overcome these limitations and integrate them into standard medical practice, highly scientific studies, research instruments, and well-organized clinical trials must be used.In order to improve efficacy and reduce resistance, future treatment strategies must focus on isolating active phytoconstituents, developing novel dosage delivery systems, such as carriers based on nanotechnology, and exploring combination therapies that employ conventional medications. Additionally, additional advancements in omics and microbiome research technologies can be utilized to supplement individualized and targeted ulcer therapy.
REFERENCES
Abhishek N., U. Rajashekhar, Phytosomes: Pharmacological Evaluation of Plant-Derived Gastroprotective Agents: Molecular Mechanisms, Comparative Efficacy, and Future Therapeutic Directions in Peptic Ulcer Disease, Int. J. of Pharm. Sci., 2026, Vol 4, Issue 4, 1785-1806 https://doi.org/10.5281/zenodo.19510665
10.5281/zenodo.19510665