Amla (Phyllanthus emblica) as a Promising Phytotherapeutic Agent in the Management of Polycystic Ovary Syndrome: A Comprehensive Review

Table:1 Major Clinical Manifestations Associated with PCOS

2. Pathophysiology of PCOS

By the time the diagnosis is made, PCOS manifests as a phenotype that reflects a vicious cycle that involves ovarian, metabolic, and neuroendocrine abnormalities. Many theories concerning the proximal physiologic causes of PCOS have been put forth over time. Multiple protein and gene interactions driven by environmental and epigenetic variables are reflected in PCOS. This article breaks down the elements that lead to the development of PCOS in preclinical models and humans in several sections. PCOS is characterized by both biochemical and clinical hyperandrogenism [18]. As of right now, there are no particular diagnostic tests for PCOS.A disturbance in regular ovulation is a hallmark of ovulatory dysfunction. It was discovered that women with PCOS had higher LH levels and lower FSH levels. This indicates anovulation, or irregular ovulation, which can result in the development

of numerous ovarian cysts and larger ovaries since there are insufficient eggs generated to be discharged. The body becomes chronically inflamed as a result, which eventually leads to hormonal imbalances, irregular menstruation or amenorrhea, and problems with fertility in women [19]. Hormone levels in ovarian cycle has been summarized in figure 1.

Figure 1: Hormone levels in ovarian cycle

2.1 PCOS Phenotype

The PCOS phenotype is multifactorial with an important association between hormonal, metabolic, environmental and genetic factors. It has been established that insulin resistance, ovarian dysfunction and neuroendocrine disorders play an important role and are key determinants of disease development. Genetic polymorphisms and epigenetic modifications also play a role in the expression and susceptibility to the disorder. Disease severity is greatly influenced by lifestyle factors as diet, exercise, and exposure to the environment [17,20]. The life stage (adults, pregnancy) and visceral fat storage also affect metabolic imbalance. The endocrine disturbance associated with PCOS is exacerbated by adrenal failure and changed hormonal exposures. Overall, the image emphasizes that there is not one single issue, but rather a complex and interconnected network of systems that cause PCOS [3]. The classification of PCOS Phenotypes has been summarized in figure 2.

Figure 2: Classification and features of PCOS Phenotype

3. Pharmacological profile of Amla

Disease is an upset of the basic homeostatis of the body. Pro-oxidant and anti-oxidant homeostasis imbalances are a crucial factor in most diseases. There are two ways in which pro-oxidant conditions prevail: either they increase the generation of free radicals or they decrease the scavenging/quenching of the free radicals by antioxidants that protect the organism from the harmful. Emblica officinalis (Amla) which is rich in antioxidants (polyphenols, Vitamin C) that reduces the oxidative stress and improves the ovarian function is of major importance [21]. From a pharmacological aspect Amla possesses lipid lowering and insulin sensitizing properties which are helpful in metabolic issues that are often associated with PCOD. Furthermore, it has endocrine-modulating and anti-inflammatory properties that could regulate hormonal imbalance and menorrhea. Amla is promised to be an additional therapy in Ayurveda, where emblica officinalis (Amla) is used as a Rasayana, which improve digestion, vigor and the treatment of menstruation and metabolic diseases. It is rich in vitamin C and has potent antioxidant properties, it also contains other vital bioactive chemicals like flavonoids, phenolics and tannins (Emblicanin A & B). As a nutritional aspect, it contributes to metabolic health with essential minerals and amino acids. Pharmacological significance of Amla in PCOD is mainly due to its insulin sensitizing, anti-androgenic, anti-inflammatory and lipid lowering properties which helps to regulate hormonal imbalance and enhances the ovarian function. It also helps in reducing the levels of androgens and improving glucose metabolism, which also helps in controlling PCOD. Overall, it links hormonal and metabolic pathways and therefore is a potential natural choice for PCOD treatment program.The amla tannins, emblicanin-A (37%), emblicanin-B (33%), punigluconin and peduculagin, when given to rats, were found to be good antioxidants and inhibit hemolysis caused by oxygen radicals and also have an anti-proliferative effect on uterine and stomach cancer cells. It is mainly active through enhancement of Natural Killer (NK) cells activity in various kinds of tumour cells. The recycling of sugar molecules and the transformation of polyphenols into medium and high molecular weight tannins are the mechanisms underlying antioxidant action [7,9,22].

4. Pharmacological investigations

4.1 Ulcer Protective and healing activity

Pepticare (Glycyrrhiza galabra, Emblica officinalis, and Tinospora cordifolia) was found to lower ulcer index, volume, and total acidity in rats with pylorus-ligated and ethanol-induced gastric mucosal damage when administered in 125, 500 per kg dose [23].

4.2 Memory elevating activity

To ascertain the brain's cholinesterase activity, the effects of the Ayurvedic medication Amla churna (Emblica officinalis) on serum total cholesterol levels and memory were examined. In this investigation, three oral doses of Amla churna (50, 100, and 200 mg per kg) were administered to different groups of young and old mice over the course of 15 days. As exteroceptive behavioral models, the raised plus maze and passive .As interoceptive behavioral models, scopolamine and diazepam were used to treat age-induced forgetfulness. Serum levels of total cholesterol and brain cholinesterase activity were calculated. Young and old mice's memory scores improved in a dose-dependent manner when Amla churna was administered at the above doses [23,24].

4.3 Hepatho Protective Activity

E. officinalis was used as a prophylactic measure to lessen paracetamol-induced hepatotoxicity in the histological analysis of rat liver cells, and it has been noted that fruit extract can reverse toxicity or hepatic damage [22].

A second histological investigation was conducted to show that a 50% hydroalcoholic extract of fresh E. officinalis fruit protected rats from long-term .toxiciy brought on by thiocetamide and carbon tetrachloride.By speeding up regenerative activity, E. officinalis was able to correct the aberrant histology in the liver sections of the tested rats. In a few instances, the hepatocytic injury was found to be minimal in the rats treated with E. By lowering the number of gamma-GT [25].

4.4 Anti Hepatocarcinogenic Activity

In another study, Emblica officinalis loers positive foci that the Solt Farber regimen causes in the liver of Worsen rats, it reverses the histological alterations. The intraperitoneal administration of 200 mg of diethylnitrosoamine (DEN) per kilogram of body weight caused tumor [21].

5. Mechanism of action of Amla in PCOS

The complex pathophysiology of PCOS, which is marked by oxidative stress, insulin resistance, hyperandrogenism, and chronic inflammation, necessitates multitargeted therapeutic approaches. In Ayurveda, there are a number of botanicals with pharmacological activities that correlate with these pathophysiological regions [26]. Randomized controlled trials have demonstrated that W. somnifera is a well-known adaptogen that helps PCOS patients with stress-induced hyperandrogenism by regulating the HPA axis and lowering cortisol levels. Additionally, by influencing the pathways involved in ovarian steroidogenesis and glucose metabolism, withanolides and sitoindosides enhance insulin sensitivity and ovulatory function. Among the steroidal saponins found in A. racemosus is shatavarin IV, which possesses phytoestrogenic properties [27].

These substances imitate the actions of estrogen in animal experiments to restore regular menstrual cycles and encourage follicular growth. By improving estrogen receptor signaling in the ovarian microenvironment, it may also encourage ovulation through its reproductive hormone-modulating properties. Guduchi, or T. cordifolia, is a plant with anti-inflammatory and insulin-sensitizing properties. Berberine and cordifolioside A, two of its bioactive constituents, suppress pro-inflammatory cytokines like interleukin (IL)-6 and tumor necrosis factor alpha (TNF-α), hence reducing systemic inflammation in PCOS animal models. Additionally, Guduchi boosts GLUT4 expression and enhances PI3K/Akt signaling, which significantly improves glucose absorption and lowers insulin resistance, a crucial component of PCOS pathogenesis [28].

The Triphala formulation, which consists of Terminalia chebula, Terminalia bellirica, and Emblica officinalis, is an antioxidant compound high in polyphenols. These herbs improve antioxidant activity, neutralize reactive oxygen species, and lessen lipid peroxidation in ovarian tissue.By regulating estrogen and progesterone levels and promoting metabolic function, triphala aids in maintaining reproductive balance in experimental conditions.By boosting GLUT4-mediated glucose absorption and insulin receptor activation, cinnamon (Cinnamomum verum) improves metabolic markers in PCOS patients. Its active components, like cinnamon aldehyde, may decrease anti-Müllerian hormone levels and improve insulin dynamics, both of which support ovulatory processes. By stimulating AMPK signaling in pancreatic β-cells and adipose tissue, Momordica charantia, also referred to as bitter gourd, functions as a natural insulin mimic, hence reducing insulin resistance and irregular menstruation in PCOS phenotypes.Guggulu, or Commiphora mukul, contains guggulsteroids, which are agonists of the farnesoid X receptor [29]

5.1 Anti-inflammatory Effect

An in vitro investigation of E.officinalis leaf extract in tetrahydrofurane, 1,4-dioxane, and methanol against human polymorphonuclear leukocytes (PMNs) revealed that the extract inhibited the migration and degranulation of human PMNs mediated by receptors. In rats with carrageenan and dextron-induced hind paw oedema, methanolic leaf extract of E. officinalis inhibited leukotriene B4 (LTB4), thromboxane B2 (TXB2), and platelet-activating factor (PAF). An additional in vitro investigation shown that via blocking the formation of TXB2 in platelets, the diethyl ether extract of amla leaves in human PMNs inhibits the adrenalin-induced platelet aggregation and blood clotting [30]. Rats with ear oedema caused by arachidonic acid (AA) and ethyl phenylpropiolate (EPP) are given an aqueous extract of amla fruits at a concentration of 1 mg/ear, which reduces inflammatory mediators such as pro-inflammatory cytokines, kinins, histamine, and serotonin (5-HT). It was determined that pretreatment with a methanolic extract of amla fruit reduced the level of blood LDH and inhibited the infiltration of inflammatory cells and oedema in rats with ulcerative colitis produced by indomethacin and acetic acid.
In rats with L-arginine-induced pancreatitis, the study demonstrated that amla therapy reduced pancreatic hemorrhage and vascular thrombosis by improving DNA synthesis, pancreatic proteins, and amylase content, as well as by lowering serum levels of lipase and IL-10. In an explant culture of articular knee cartilage, an aqueous extract of amla fruit demonstrated chondroprotective potential by preventing the enzymes collagenase type 2 and hyaluronidase from doing their work [31].

5.2 Anti-oxidant Effect

Numerous research have demonstrated the potent antioxidant properties of amla. Because of its ability to scavenge free radicals, E. officinalis's aqueously extracted carbohydrate polymers decreased oxidative stress. In rats fed cholesterol, the flavonoid content of E. offficinalis at a dose of 10 mg/kg p.o. has been linked to this antioxidant activity [32]. Additionally, administering fresh amla fruits at doses of 250, 500, and 750 mg/kg for 30 days to rats suffering from ischemic reperfusion (IR) injury prevented oxidative stress and myocyte damage by blocking lipid peroxidation and raising myocardial antioxidant levels such as catalase (CAT), glutathione peroxidase (GPx), reduced glutathione (GSH), and SOD. Using hepatocyte cell line (HepG2), an aqueous extract of amla fruit was found to decrease oxidative stress by lowering levels of ROS and lipid hydroperoxide while raising levels of antioxidant enzymes like glutathione reductase, glutathione S-transferase, glutathione peroxidase, and GSH [33]. The decreased levels of antioxidant enzymes like SOD, CAT, and GPx were also restored when E. officinalis tannoid principles (emblicanin A and B) were administered intraperitoneally (i.p.) once daily for seven days at doses of 5 and 10 mg/kg to the striatal and frontal cortical regions of rat brains. Additionally, giving amla juice (0.01 ml/day) to rats exposed to cadmium protected brain cell damage due to its antioxidant capability through a number of pathways, including a reduction in protein and lipid peroxidation [34].

5.3 Anti hyperlipidaemic Effect

Atherosclerosis is thought to be largely caused by elevated levels of lipids such as LDL, total cholesterol (TC), and TG. LDL cholesterol levels in cholesterol-fed rats were lowered by oral administration of amla ethyl acetate extract. By controlling the changed amounts of LDL, TG, and HDL, amla fruit pulp powder administration also restored the blood lipid profile in the birds [35]. Additionally, a clinical investigation discovered that giving hypercholesterolemic individuals an aqueous extract of amla fruits at doses of 500 and 1000 mg/day for six months attenuates the level of TC and lipid profile by blocking squalene epoxidas and HMG CoA reductase [36]. Flavonoids derived from E. officinalis have also been shown to promote cholesterol breakdown in hyperlipidemic rats and decrease lipid levels by blocking HMG CoA reductase. Additionally, by changing the way that cholesterol and phospholipids are absorbed and increasing their excretion, fresh amla juice given to cholesterol-fed rabbits at a dose of 5 ml/kg for 60 days decreased lipid levels. When given to rats with age-associated hyperlipidemia at doses of 40 or 10 mg/kg for 100 days, ethyl acetate extract of amla has been shown to have hypolidemic potential via increasing the levels of PPAR α, a protein that controls the transcription of genes relevant to lipid and cholesterol metabolism [37].

5.4 Hepatoprotective Effect

In rat hepatocyte suspension culture, the hepatoprotective effect of a 50% hydroalcoholic extract of E. officinalis fruits against anti-tuberculosis medications was assessed. This was demonstrated by the extract's antioxidative properties and inhibition of Cytochrom P450 2E1 (CYP 2E1), a protein that causes oxidative stress and hepatic injury. In rats treated with N-nitrosodimethylamine, amla at a dose of 100 mg/kg b.w. reduces the expression of iNOS and CYP2E1 protein, improves the expression of manganese superoxide dismutase (Mn SOD) and CAT, and decreases hepatic apoptosis and autophagy by down-regulating the expression of beclin-1 and the Bax/Bcl-2 ratio. Additionally, preadministration of E. officinalis in rats with carbon tetrachloride (CCl4)-induced hepatic injury prevented hepatotoxicity by raising GSH, glutathione reductase, and peroxidase levels while decreasing serum glutamate pyruvate transaminase (SGPT), serum glutamate oxidase transaminase (SGOT), LDH, and lipid peroxidation [38]. Furthermore, in mice with ochratoxin-induced lipid peroxidation in their liver and kidney, the administration of an aqueous extract of amla at a dose of 2 mg/day p.o. for 45 days reduced the lipid peroxidation through its free radical scavenging activity, which in turn decreased the production of hydroxyl, peroxides, and superoxide radicals and consequently increased the concentration of GSH. Another study on amla found that in rats with CCl4-induced liver injury, alcoholic extract of amla at a dose of 100 mg/kg p.o. prevented the fibrosis and pre-fibrogenic process by lowering elevated levels of collagen-hydroxyproline and by boosting regenerative activities like anisocytosis and anisonucleosis. As a result, the abnormal liver histopathology was avoided [39].

6. Nano drug delivery system for Amla

Nanotherapeutics Polycystic ovarian syndrome (PCOS): Early and precise diagnosis is crucial in order for patients to receive timely and reliable preventive care maintain their reproductive levels and lower their risk of cardiovascular, metabolic, and later-life reproductive issues. PCOS testing that is conventional, which mainly comprises biochemistry screening, hormonal testing, and imaging, frequently has high expense, a lengthy turnaround period, low sensitivity, and inconsistent accuracy across the various demographics. The FSH-LH-testosterone hormone test can be useful. information, but frequently misses the free, active form of androgens [40]. The role in The importance of sex hormone-binding globulin (SHBG) has grown since Variations in SHBG more accurately reflect levels of functional testosterone and improve the diagnostic precision of hyperandrogenism associated with PCOS. Nanotechnology can solve these problems. Researchers can identify other indicators, including SHBG using biosensors or diagnostic instruments made of nanomaterials with increased sensitivity, lower outcomes, and lower expenses compared to other labs. The optical and electrical aspects Gold nanoparticles, quantum dots, and polymer-based nanosystems' characteristics can be very selective binding to biomolecules. These characteristics lower detection limits, increase signal strength, and lessen cross-reactivity, making them the top contenders for PCOS diagnosis in the future [25].

6.1 Polymeric Nanoparticals

Bioactive phytochemicals are being used in practical relationships with Polycystic ovarian syndrome (PCOS) is treated with clomiphene citrate as an adjuvant.This combination has the potential to improve the structure and restore hormonal balance of the ovary. These findings demonstrate the varied therapeutic use of phytochemical-based delivery methods in modern medicine Styrene The biomedical industry is already seeing an increase in the use of nanoparticles (PNs).  The advantages including excellent biocompatibility, low toxicity, and a simple production process, they are the greatest drug delivery vehicles because of their simple functionalization of surfaces [28]. The addition of phytonutrients to PNs is a topic of much discussion in the realm of breast cancer treatment, a strategy that suggests patient-centered and focused therapy. Researchers use a variety of conventional fabrication techniques to polymeric nanoparticles with phytochemical integration (PNs). These are composed of the 59layer-by-layer construction, ionic gelation, nanoprecipitation, and emulsion evaporation. Each of them has unique benefits in terms of stability, particle size, and
efficacy of encapsulation. As a result, PNs can be customized to meet therapeutic needs.
Adding bioactive phytochemicals to these has shown to be a fruitful approach. Nanotechnology. It not only increases the therapeutic impact but also creates synergy having several molecules. The potential for co-encapsulated antioxidants and anti-inflammatory phytochemicals to interact with one another to improve overall outcomes [4,7, 30].

6.2 Natural-Based Drug Nanoparticles

Clinical research like that done has shown that Supplementing with curcumin could be a safe and useful supplemental therapy for reduce PCOS-related hyperandrogenism and elevated blood sugar levels. Herbal extracts have been demonstrated to be beneficial for PCOS in similar tests. therapy, such as Aloe barbadensis gel, which has restorative effects on the letrozole-related Chamomile extract promotes healthy follicular growth in animal models. among the rats employed. Despite this hopeful development, the typical PCOS medication has adverse effects and not everyone will react to these drugs [41]. It has been greater interest in herbal remedies since plant chemicals can interact with one another and improve what others do. Clinical research like that done has shown that Supplementing with curcumin could be a safe and useful supplemental therapy for reduce PCOS-related hyperandrogenism and elevated blood sugar levels. Herbal extracts have been demonstrated to be beneficial for PCOS in similar tests. therapy, such as Aloe barbadensis gel, which has restorative effects on the letrozole-related Chamomile extract promotes healthy follicular growth in animal models. among the rats employed. Despite this hopeful development, the typical PCOS medication has adverse effects and not everyone will react to these drugs. It has been greater interest in herbal remedies since plant chemicals can interact with one another and improve what others do [42].

7. Clinical trials

Due to the lack of direct large-scale trials in PCOS patients, there is currently little clinical data to support the therapeutic potential of Emblica officinalis (Amla) in PCOS. Nonetheless, a number of clinical trials carried out in associated inflammatory and metabolic disorders offer compelling indirect support for its application. Amla supplementation dramatically improves lipid profiles by lowering total cholesterol, triglycerides, and low-density lipoprotein (LDL) while raising high-density lipoprotein (HDL) levels, according to randomized controlled trials [37]. Amla has also been demonstrated to improve endothelial function and lower oxidative stress in human patients. Its capacity to lower blood glucose levels and inflammatory indicators like C-reactive protein has also been reported in other clinical research and meta-analyses, suggesting its function in enhancing insulin sensitivity and lowering chronic inflammation. Moreover, evidence from hormone-related conditions suggests a potential anti-androgenic effect of Amla, which may be beneficial in managing hyperandrogenism associated with PCOS. Collectively, these findings suggest that although direct clinical evidence in PCOS is scarce, Amla exhibits multiple pharmacological effects that target key pathophysiological mechanisms of the disorder, including insulin resistance, dyslipidemia, oxidative stress, and hormonal imbalance [33].

Table 2: Clinical Studies of Emblica officinalis (Amla) Relevant to PCOS

Table 3:Patents Related to Emblica officinalis (Amla) in PCOS and Related Conditions