To Develop an Eco-Friendly Herbal Hydrogel by Using Seed Mucilage and Leaf Extract for Enhanced Wound Healing

FIGURE 1: PHASES OF WOUND HEALING [6]

1.2: BENEFITS OF HYDROGELS  

1. There are many different uses for hydrogels. because of distinct configurations and resemblances to various types of use. 

2. Hydrogels offer a wet environment that accelerates the healing of wounds.

3. They assist in keeping the wound site well hydrated.

4. The surface of the wound is calmed and cooled using hydrogels.

1.3: HYDROGEL'S DIFFICULTIES

1. Hydrogels are easily torn during handling and have a low mechanical strength.

2. Skin maceration surrounding the wound may result from hydrogels' high-water content.

3. If hydrogels are not well conserved, they may encourage microbial growth.

4. During storage, some hydrogels exhibit poor chemical and physical stability.

5. Hydrogels made of natural polymers frequently have a brief shelf life. [7]

1.3: GOALS

1. To use appropriate extraction techniques to extract bioactive components from watermelon seeds and bel Patra leaves.

2. To combine these natural extracts with appropriate gelling agents (like Carbopol) to create a hydrogel composition.

3. To assess the hydrogel's physicochemical characteristics (pH, viscosity, spread ability).

4. To investigate hydrogel's antibacterial efficacy against typical wound infections.

5. To assess the hydrogel's capacity to heal wounds using laboratory or in-vitro testing techniques.

6. To evaluate the produced hydrogel's stability under various storage scenarios.

7. To assess how well herbal hydrogel works in comparison to a conventional formulation for wound healing.[8]

1.4: HYDROGELS SWELLING RESPONSE:

Physical Cues

 • Electric field and temperature

• The magnetic field

• Light

• Pressure

• Audio [9]

Chemical Cues

• pH

• Ionic power

• The composition of the solvent

• Interaction between molecules [10]

FIGURE 2: HYDROGELS SWELLING RESPONSE

1.5: ANTIBACTERIAL HYDROGELS FOR THE HEALTH OF WOUNDS:

me bacteria, including Acinetobacter baumannii, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Staphylococcus epidermis live in chronic wounds and may cause serious consequences for the patient. Opportunistic bacteria can enter, colonize, and grow at the site of many types of wounds, including burns and traumas, which may lead to infection. A prolonged healing period and, in certain cases, disability and death can result from infected wounds. Antibiotic misuse has led to the emergence of some multidrug-resistant (MDR) microorganisms. Antibiotic use as a treatment is therefore losing its ability to stop infections. Preventing antibiotic resistance and reducing mortality requires the development of innovative methods and technologies that employ antibiotics or antibacterial chemicals.[11]

1.6: Types of Hydrogels:

1.6.1: Pure Polymer

Hydrogels made from natural polymers, such as proteins and polysaccharides, originating from plants or animals are essential for encasing insecticides. They are prized for their biocompatibility, safety, and biodegradability, which guarantee environmentally benign breakdown following usage. These hydrogels can efficiently control pesticide release in soil to increase efficacy and reduce environmental damage from overuse since they are skilled at absorbing and holding onto water. Natural cellulose's structural properties improve pesticide encapsulation. Derivatives like carboxymethyl cellulose create networks that stop pesticide leaks and extend their release time. Derived from chitin, chitosan expands in response to pH variations and interacts with other polymers to regulate release rates.

1.6.2: Artificial Polymer

Because of their controlled shapes, mechanical strength, and chemical stability, synthetic polymer hydrogels—such as those derived from polyacrylamide (PAM) and PVA—are useful for encasing pesticides. These characteristics improve the stability and durability of pesticide release, increasing its use. PAM is particularly popular in biomedicines and agriculture because of its water retention and nontoxicity. But there are issues with using PAM. PAM synthesis uses acrylamide, which has the potential to be neurotoxic and release unreacted particles that could endanger human health and the environment.[12]

1.7: Biomedical Uses 

Biosensing Applications: Peptide hydrogel biosensors have drawn more attention recently because of their high sensitivity to external stimuli like pH and temperature, good cell adhesion, well-known chemistry for structural modification, long-term chemical and mechanical stability, antifouling properties, tenable viscoelastic characteristics, and self-healing features. Hydrogels can be classified into two main groups based on their chemical structure: peptide hydrogels with high environmental sensitivity, such as to pH, temperature, or electrical fields, that are used alone without bioreceptors or other auxiliary sensing components, and peptide hydrogels with high porous structures and large internal surfaces that are applied in conjunction with sensing biomolecules, such as enzymes, DNA strands, and label molecules.

Delivery of Anticancer Drugs: Patients frequently have negative side effects from traditional cancer chemotherapy because the medicines are delivered uncontrollably to healthy cells, harming them. Peptide-based hydrogels have been employed as drug delivery systems to lessen these negative side effects and improve therapeutic efficacy because of their biocompatibility, tenable structure to load various drugs, water-filled mesoporous structures, and sensitivity to external stimuli to induce drug release. In actuality, hydrogels frequently enhance the chemical stability, solubility, and bioavailability of anticancer medications. Chemically speaking, there are two main ways that pharmaceuticals can be absorbed into hydrogels: through chemical or physical interactions.[21]

1.8: Using hydrogel as a carrier

Hydrogels' distinct internal structure, great biocompatibility, and mechanical stability make them perfect transporters and dressings. Hydrogels allow for the targeted release of therapeutic substances without being quickly eliminated by the kidneys. Antioxidants, bioactive compounds, and metal ions are examples of medicinal chemicals that may be more effective in treating DFU. The hydrogels are one of these therapeutic compounds that contribute to ROS scavenging, which is the primary function of antioxidants and a useful strategy for promoting wound healing and related processes.[22]

1.9: The Hydrogel's Mechanical Durability 

Water-based hydrogels are fragile and brittle at the same time as being as soft as tissues. A crucial problem that needs to be resolved in order to create useful hydrogel bio adhesives is the mechanical fragility of hydrogels. Hydrogels cannot withstand the external forces imposed by the tissue environment because tissues move and deform often. Additionally, the toughening characteristic makes the hydrogel notch-insensitive, meaning that even in the presence of mechanical flaws or damages, it does not break. The hydrogel's network's reversible crosslinking allows it to return to its original mechanical structure and characteristics. The hydrogel's long-term stability is further guaranteed by its self-healing characteristic. TA is essential because it offers reversible crosslinking for self-healing and efficient energy dissipation for toughness.[23]

1.10: Hydrogels' Limitations

Insufficient Mechanical Power

Weak and easily shattered 

Unsuitable for situations involving heavy loads 

Poor Durability

can eventually deteriorate or lose its structure. 

Some formulations have a short shelf life.

Restricted Drug Loading Capability

In particular for: 

Drugs that are hydrophobic 

Mostly appropriate for hydrophilic medications 

Microbial Contamination Risk

High water content is conducive to microbial growth and necessitates: 

Preservatives

Preparing sterile.[24]

2. PLAN OF WORK

2.1: Material & Method

• Materials:

Watermelon seed extract: Hydrating, anti-inflammatory, and antimicrobial  

Bael leaf extract: Antioxidant and anti-inflammatory

Gelatine: A gelling agent  

Glycerine: Humectant   

Citric acid: pH correction  

Solvent: Distilled Water  

Citric acid: A preservative

Castor oil: An enhancer of penetration   

Coconut oil: The cooling effect

• Drug Profile:

• Methodology

2.1: Extraction Process (Maceration) 

Step 1: Collection of crude drugs  

Gather bel leaves and watermelon seeds from the market.  

Make sure the seeds are clean.  

Give them two to three days to dry.

Step 2: Extraction of Plan

Extraction of Watermelon Seed:

Gather watermelon seeds and give them a thoroug cleaning.

Dry them in shade for 2–3 days.

Grind the seeds into fine powder.

Take 10 g powder + 100 ml distilled water / ethanol.

Perform extraction using Maceration Process for 3–4 days.

Filter the extract.

Collect the watermelon seed extract

Bel Leaf Extract

Wash and shade dry for 2–3 days.

Grind into powder.

Take 10 g powder + 100 ml distilled water.

Perform extraction using Maceration Process for 3–4 days.

Collect the bel leaf extract

Preparation of Hydrogel:   

1 gm of Gelatin is dispersed in 100 ml of distilled water.

Stir continuously using a magnetic stirrer.

Allow the mixture to swell for 1–2 hours.

Then add 5 ml watermelon seed extract 5 ml bel leaf extract Mix thoroughly.

Add glycerin (3–5 ml).

Add 0.1% Citric Acid as a preservative.

Citric Acid for adjusting the Ph [5-6]

Continuously stirring until the uniform gel formed

3.CHEMICAL TEST’S

1.Alcoloids

2. Flavonoids

3. Phenolic compound

1: TEST FOR ALCOLOIDS.

2. TEST FOR FLAVONOID’S

3.TEST FOR PHENOLIC COMPOUND

EVALUATION PARAMETER: