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  • Evaluating The Therapeutic Potential Of Garcinia Gummi-Gutta
  • 1Research intern, Bioroot Exploration India Pvt Ltd, Thiruvananthapuram, Kerala, India
    2Founder/Managing Director, Bioroot Exploration India Pvt Ltd, Thiruvananthapuram, Kerala, India
     

Abstract

The study examines the phytochemical content and therapeutic properties of methanolic extracts from the rind and fruit of G. gummi-gutta. Both qualitative and quantitative analyses revealed the presence of flavonoids, alkaloids, tannins, and phenols in the rind, and flavonoids and tannins in the fruit. The therapeutic properties like anti-oxidant, anti-diabetic, anti-cancer, anti-inflammatory, wound healing, anti-ulcer, and anti-microbial were determined using DPPH assay, ?-amylase inhibition assay, MTT assay, protein denaturation assay, wound scratch assay, acid neutralizing capacity method, and agar well diffusion method respectively. Results showed that anti-oxidant and anti-diabetic activities increased with extract concentration. The rind extract exhibited significant anti-cancer activity, with a 32.08% inhibition of MCF-7 cell lines at 100 and 200µg/mL. The anti-inflammatory effect was higher in the rind (79.35%) than in the fruit (58.04%) at 100µg/mL. The wound healing effect was greatest at 50 µg/mL with 87.45% closure. Anti-ulcer activity decreased with higher extract concentrations. Both extracts showed anti-microbial activity against bacteria, though not against fungi. The rind extract generally demonstrated greater therapeutic potential than the fruit extract.

Keywords

Garcinia gummi-gutta; Anti-oxidant; Anti-diabetic; Anti-inflammatory; Anti-cancer; Wound healing

Introduction

Garcinia is an indigenous tropical crop belonging to the Clusiaceae family, with around 390 species, making it the largest genus within the family [1]. Predominantly found in Southeast Asia [2]. Garcinia gummi-gutta, also known as Malabar tamarind, is highly valued for its medicinal properties [1, 2]. The tree reaches upto 12 meters in height, and its fruit, resembling a small pumpkin, changes color from yellow to green or red when ripe, containing a soft white pulp and six to eight seeds [1, 3]. The fruit has been used in cooking for its unique flavor and in various traditional remedies such as curing seafood, condiment in curry cuisines [4, 5]. Additionally, the fruit extracts are utilized as astringents, demulcents, rheumatism relievers, bowel problem relievers, and purgatives [6]. Garcinia fruit rinds, dark brown or black when dried, are used for storage, as fish seasoning, and as a spice [3, 4]. Garcinia's rind, rich in hydroxycitric acid (HCA), is known for its weight-loss properties and is widely used as a spice [4, 7]. The fruit's sun-dried rind is also utilized as a purgative, anti-bacterial, and astringent [8].Various phytochemicals are extracted from different parts of the tree. Phytochemicals like garcinol, isogarcinol, and rheediaxanthone A are extracted from Garcinia bark using solvents like benzene, methanol, and acetone under reflux [9]. The fruit contains benzophenones (garcinol, guttiferone I, J, K, M, N), xanthone (oxyguttiferone K), and organic acids (hydroxycitric acid, garcinia acid) extracted with ethanol under reduced pressure or methanol using soxhlet extraction [10, 11]. Fruit rind yields camboginol, isoxanthochymol, and hydroxycitric acid extracted using methanol under ultrasonication or ethanol [10, 12]. From the latex, camboginol and cambogin (isogarcinol) are isolated. These are extracted by a simple crystallization method using petroleum ether (solvent) [13]. Leaf extracts include a wide array of phytochemicals such as garcinol, mangostin, gambogic acid, hydroxycitric acid lactone (garcinia acid), protocatechuic acid, caffeic acid, ferulic acid, vanillic acid, epicatechin, isoorientin, orientin, isovitexin, vitexin, kaempferol-3-O-rutinoside, luteolin, quercetin, apigenin, kaempferol, fukugiside, GB-1, amentoflavone, ursolic acid, and betunilic acid obtained via soxhlet extraction with methanol [11]. Root extracts predominantly contain garbogiol using reflux extraction with benzene, methanol, and acetone as the solvents [9]. These phytochemicals exhibit various medicinal properties, including anti-diabetic, anti-inflammatory, antioxidant, anti-cancer, anti-microbial, anti-ulcer, and wound healing effects [1, 2, 14, 15]. Oxidative stress and antioxidant imbalance serve as critical factors in the initiation of various diseases like diabetes, cancer, cardiovascular disease, inflammation, etc [15]. Flavonoids present in the plant extract demonstrated anti-oxidant properties [11, 16].  Reactive oxygen species (ROS) and reactive nitrogen species (RNS) generated during cellular processes can oxidize vital components, damaging proteins, lipids, and DNA [15, 17]. Anti-oxidants like superoxide dismutase, catalase, and methionine sulfoxide reductase scavenge these reactive species and repair damage [17]. Flavonoids from G. gummi-gutta, such as epicatechin, isoorientin, isovitexin, exhibit anti-oxidant properties [11, 16]. Another application of G. gummi-gutta extract is the anti-diabetic property. Diabetes mellitus is characterized by elevated blood glucose, leading to chronic hyperglycemia and lipid profile abnormalities [18, 19]. Garcinol and hydroxycitric acid from G. gummi-gutta have demonstrated anti-diabetic activity [1]. These phytochemicals are also studied for anti-cancer properties [1, 20, 21, 22]. Cancer involves uncontrolled cell growth, forming malignant tumors [23]. Phytochemicals from G. gummi-gutta, such as benzophenones and xanthones, showed anti-cancer activity against lung, colorectal, prostate, and breast cancers [1, 20, 21, 22]. These compounds also have potential anti-inflammatory properties [24, 25]. Inflammation occurs due to infections, injury, cell death, cancer, ischemia, and degeneration [24]. Saponins and tannins exhibit anti-inflammatory activities [16]. Garcinol and hydroxycitric acid from G. gummi-gutta demonstrate anti-inflammatory properties, aiding wound healing [1, 14]. Cells involved in wound healing release growth factors and cytokines like IL-6 and TNF-? [14]. Wound healing properties of Garcinia species like Garcinia mangostana and Garcinia brasiliensis have been studied [14,26]. Phenolic compounds like xanthones, which promote fibroblast proliferation and activate wound healing pathways [14,27]. Delays in wound healing can lead to diseases like ulcers, with chronic wounds often causing ulcers [28]. Ulcers are open sores on skin or mucous membranes due to inflamed dead tissue [29]. G. gummi-gutta fruit extract showed significant anti-ulcer activity against indomethacin- and HCl-ethanol-induced ulcers in rats [1]. It also exhibited anti-microbial properties [3, 30]. G. gummi-gutta extracts showed antibacterial activity against gram-negative bacteria (e.g., Acinetobacter baylii, Escherichia coli) and gram-positive bacteria (e.g., Bacillus cereus, Staphylococcus aureus) [3]. The study aimed to evaluate the phytochemical analysis, anti-oxidant, anti-diabetic, anti-cancer, anti-inflammation, wound healing, anti-ulcer, and antimicrobial activities of G. gummi-gutta rind and fruit.

MATERIALS AND METHODS

Chemicals and Reagents

2,2-diphenyl-1-picrylhydrazyl (SRL), 3-(4,5-dimethylthiazolyl-2)-2,5 diphenyltetrazolium bromide (SRL), Acarbose (Glucobay), Aluminium chloride (NICE), Ascorbic acid (HIMEDIA), Bovine Serum Albumin (SRL), Bromo cresol green (MEDILISE), Chloroform (MEDILISE), Ciprofloxacin (HIMEDIA), Diclofenac (SIGMA-ALDRICH), Dimethyl sulfoxide (HIMEDIA), Dulbecco’s Modified Eagle Medium (HIMEDIA), Dulbecco’s Phosphate Buffer Saline (HIMEDIA), Ferric chloride (Kanton Laboratories), Fetal Bovine Serum (HIMEDIA), Folin-Ciocalteu reagent (MEDILISE), Gallic acid (NICE), Gentamicin (American Pharma Remedies), Hydrochloric acid (NICE), Methanol (NICE), Nutrient broth (HIMEDIA), Potato Dextrose Agar (HIMEDIA), Quercetin (SRL), Sodium carbonate (NICE), Sodium hydroxide (Kanton Laboratories), Sodium nitrate (Kanton Laboratories), Starch (SRL), Sulphuric acid (MEDILISE), Tannic acid (MEDILISE), Wagner’s reagent (Kanton Laboratories), ?-amylase (Kanton Laboratories)

Instruments

Autoclave (FOURTECH), CO2 incubator (FORMA SERIES II WATER JACKET), Incubator (FOURTECH), Inverted microscope (TCM 400), Inoculation hood (ROTEK), Bio safety cabinet Class II Type B II (ROTEK) Magnetic stirrer (Lab Companion), Visible spectrophotometer (Thermo SCIENTIFIC), Vortex (Lab Companion), Water bath (ROTEK), Weighing machine (SHIMADZU)

Cell lines

L929 and MCF-7 cell lines were obtained from Bioroot Exploration India Pvt Ltd.

Preparation and extraction of the sample

Dried rind and fresh fruit of G. gummi-gutta were sourced from Kerala, India. 15 g of finely cut rind pieces were transferred into a thimble and 40 mL of methanol (solvent) was added to the round bottom flask. Soxhlet extraction process was carried out at 60°C for 4-6 hours. The fresh fruit was dried and powdered and extracted similarly. Both crude extracts were stored at 4°C for future use [31].

Qualitative screening of phytochemicals

Terpenoids

To 1 mL sample, 2 mL chloroform was added. Then a few drops of concentrated sulphuric acid were added. The appearance of an interface with a reddish-brown color indicated the presence of terpenoids. However, the solution exhibited a yellow color which indicated the absence of terpenoids [8].

Flavonoids

2 mL of 2% NaOH was added to 1 mL of the sample. The color of the solution turned into golden yellow. Upon adding a few drops of diluted HCl, the color of the solution changed to colorless, indicated the presence of flavonoids [32].

Alkaloids

A few drops of Wagner’s reagent were added to 1 mL of the sample. The appearance of a brown or reddish precipitate indicated the presence of alkaloids [32].

Saponins

2 mL of distilled water was added into 1 mL of the extract, shaken vigorously, and allowed to stand for 10mins. There was a formation of foam on the surface of the mixture. Then shaken for 10mins, the appearance of foam confirmed the presence of saponins. However, there was no foam development in the solution. Hence, saponin presence was not detected [8].

Tannins

To 1 mL sample, 2 mL of 0.1?rric chloride was added. The brownish-green or blue-black color indicated the presence of tannins [8].

Phenolic compounds

A few drops of 5?rric chloride were added to 1 mL of the sample. The appearance of dark green or bluish-black color indicated the presence of phenolic compounds [32].

Steroids

To 1 mL sample, 10 mL chloroform was added. Then 10 mL of concentrated sulphuric acid was added slowly by the sides of the tube. The appearance of red color in the upper layer and yellow with green fluorescence in the sulphuric acid layer indicated the presence of steroids. However, a yellow color was displayed at the interface of the upper and lower layer which indicated the absence of steroids [6].

Quantitative estimation of phytochemicals

Phenols

To 0.5 mL of the sample, 2 mL of 1:10 diluted FC reagent and 4 mL of 7.5% Na2CO3 were added. The test tubes were covered with aluminium foil and incubated for 30mins with intermediate shaking. Gallic acid, with concentrations from 0.1 to 0.5 mg/mL, was used as the standard. All reagents except the sample were taken as blank. Absorbance was measured at               760 nm [33].

Tannins

Tannins were determined by the FC method. 0.1 mL of sample extract was added to a 10 mL volumetric flask with 7.5 mL of distilled water, 0.5 mL of FC reagent, and 1 mL of 35% sodium carbonate solution, then diluted to 10 mL with distilled water. The mixture was shaken and kept at room temperature for 30 mins. Tannic acid, with concentrations from 0.2 to 1 mg/mL, was used as standard. All reagents except the sample were taken as blank. Absorbance was measured at 700 nm [34].

Alkaloids

To 1 mL of the sample, 5 mL of phosphate buffer (pH 4.7) and 5 mL of bromocresol green solution were added. The mixture was transferred to a separating funnel and agitated. The complex was extracted with 1, 2, 3, and 4 mL chloroform by vigorous shaking and collected in a test tube. Quercetin, with different concentrations from 0.2 to 1 mg/mL, was used as the standard. All reagents except the sample were taken as blank. Absorbance was measured at             470 nm [35].

Flavonoids

2 mL of 5% NaNO3 was added to 1 mL of the sample. After 5 mins, 3 mL of 10% AlCl3 was added, followed by 2 mL 1M NaOH. The mixture was kept for 5 mins, then made up to 10 mL with distilled water. Quercetin, with concentrations ranging from 0.2 to 1 mg/mL, was used as the standard. All reagents except the sample were taken as blank. Absorbance was measured at 510 nm [36].

Anti-oxidant activity

DPPH Assay: 0.004% of DPPH was dissolved in methanol in a beaker covered with aluminium foil and incubated for 2 h. Samples at different concentrations (100, 200, 300, 400, 500 µg/mL) were prepared in methanol (solvent). Ascorbic acid, prepared at the same concentrations in water, was used as the standard. After 2 h, 4 mL DPPH solution was added to each test tube containing 1 mL sample or 1 mL ascorbic acid. DPPH solution without sample was taken as control, and methanol was used as blank. The tubes were incubated in the dark for 30 mins, and absorbance was measured at 515 nm.

DPPH Scavenged (%) = [(Ac-As)/Ac] x 100

Where Ac is the absorbance of the control and As is the absorbance of the sample [37].

Anti-diabetic activity

?-amylase Inhibition Method: Different concentrations (50, 100, 150, 200, and 250 µg/mL) of the sample and standard (acarbose) were prepared. To both, 100µl of 20 mM phosphate buffer and 100µl of 0.5 mg/mL ?-amylase solution were added, followed by incubation at 30°C for 10 mins. After adding 1 mL of 1% starch solution, the mixture was incubated again at 30°C for 10 mins. Then, 1 mL of DNS (3,5-Dinitrosalicylic acid) reagent was added and kept in a boiling water bath for 10 mins. After cooling, 1 mL of distilled water was added. All reagents except the sample/standard were used as control, and methanol was used as blank. Absorbance was measured at 540 nm.

% inhibition = [(AC-AS)/AC] x 100

where AC is the absorbance of the control and AS is the absorbance of the sample [38].

Anti-cancerous activity

MTT Assay: 0.1 x 10^6 cells/mL of MCF-7 cell lines were seeded in a 24-well plate for 24 h. The cells were cultured using complete media consisting of DMEM (Dulbecco’s Modified Eagle Medium) with 5?S (Fetal Bovine Serum), 500 µl antibiotics, and 400µl gentamicin. After obtaining 80% confluency, the media was discarded. 1 mL of complete media was added to each well and samples with varying concentrations (10, 50, 100, 200, 300, 400, and 500 µg/mL) were added into it. Then, it was gently mixed and was kept in CO2 incubator at 37 °C for 24 h followed by a wash with 500µl DPBS (Dulbecco’s Phosphate Buffer Saline). MTT (3-(4,5-dimethylthiazolyl-2)-2,5 diphenyltetrazolium bromide) reagent was prepared by dissolving MTT powder in DPBS. 500 µl of MTT reagent was added into each well and mixed gently. After 2 to 4 h of incubation, 1 mL DMSO (Dimethyl Sulfoxide) was added into each well and kept for 15 mins of incubation to solubilize purple-colored formazan in live cells. The experiment was carried out in Bio safety cabinet Class II Type B II. Absorbance was measured at 570 nm, with triplicate readings for each concentration [39].

?ll viability = (Mean OD sample / Mean OD control) X 100

?ll inhibition = (Mean OD control – Mean OD sample/ Mean OD control) X 100

Anti-inflammatory activity

Protein Denaturation Assay: To different concentrations (100, 200, 300, 400, and 500 µg/mL) of the sample and standard drug diclofenac, 1% w/v BSA (Bovine Serum Albumin) and PBS (Phosphate Buffered Saline, pH 6.4) were added. The solutions were kept at room temperature for 20 mins, then in a water bath for 5 mins at 70°C. Absorbance was measured at 660 nm after cooling. All reagents except the sample/standard were used as control, and methanol was used as blank.

% inhibition of BSA denaturation = [(AC-AS)/AC] x 100

where AC is the absorbance of the control and AS is the absorbance of the sample [40].

Wound healing activity

Scratch wound assay:

0.3 x 106 cells/mL of L929 cell lines were seeded in a 6-well plate for         24 h. The cells were cultured with complete media consisting of DMEM, 5?S, 500 µl antibiotics, and 400µl gentamicin. After obtaining 80% confluency, the spent media was discarded, and 1 mL complete media was added to each well. A scratch was made using a         200 µL tip, and the plates were kept in CO2 incubator at 37°C for 24 h. Samples of different concentrations (10, 50, 150, 300, and 500 µg/mL) were added, mixed, and incubated again at 37°C for 24 h. All reagents without sample were taken as control. The experiment was carried out in Bio safety cabinet Class II Type B II. Wound healing activity was observed and photographed at 24-hour intervals.

% of wound closure = (A0h – A24h)/A0h x 100

where A0h and A24h is the area of wound at 0th hour and 24th hour [41].

Anti-ulcer activity

Acid Neutralizing Capacity:

Different concentrations (100, 200, 500, 1000 mg/mL) of the sample were prepared. 5 mL of the sample was made upto 70 mL with water, then 30 mL of 1N HCl was added and stirred for 15 mins. Phenolphthalein (2-3 drops) was added and the mixture was titrated with 0.5N NaOH until a pink color appeared. Gelusil (500 mg/mL) was used as a standard [42].

Moles of acid neutralized = (Volume of HCl x Normality of HCl) – (Volume of NaOH x Normality of NaOH)

Acid Neutralizing Capacity (ANC) per gram of antacid = Moles of HCl neutralized/ Gram of Antacid or Extract

Antimicrobial activity

Agar Well Diffusion Method: Nutrient broth and PDB (Potato Dextrose Broth) were prepared and sterilized in an autoclave. Gram-positive bacteria (Bacillus sphearicus, Staphylococcus aureus) and gram-negative bacteria (Klebsiella pneumonia, Pseudomonas aeruginosa) were inoculated into nutrient broth and fungi (Aspergillus niger) in PDB and incubated at 37°C for           24 h. Nutrient agar was prepared by dissolving 1.3g nutrient broth and 1.5g agar in 100 mL distilled water and PDA (Potato Dextrose Agar) was prepared by dissolving 0.975 g of PDA in 25 mL distilled water. Both media were autoclaved at 121°C, 15 lbs for 30 mins and were poured into petri plates to solidify. Plates were swabbed with specific organisms, and five wells were made in each plate using a pipette tip. Samples at 100, 200, and 300 mg/mL, positive control (PC) (0.2% w/v ciprofloxacin), and negative control (NC) (50% v/v methanol) were added (30 µl each). Plates were incubated at 37°C for 24 h, and the zones of inhibition were measured [43,44].

RESULTS

Extraction of G. gummi-gutta

The methanolic extract of G. gummi-gutta rind and fruit is shown in Figure 1 and Figure 2.


       
            Picture1.jpg
       

    FIGURE 1: G. GUMMI-GUTTA RIND METHANOLIC EXTRACT


       
            Picture2.png
       

    FIGURE 2: G. GUMMI-GUTTA FRUIT METHANOLIC EXTRACT


Phytochemical analysis of methanolic extract of G. gummi-gutta

Qualitative phytochemical analysis is performed on both G. gummi-gutta rind and fruit extract (Figure 3 and Table 1).


       
            Picture3.jpg
       

           
            Picture4.jpg
       

    Figure 3: Qualitative Analysis Of Phytochemicals (A- Alkaloids,

B- Saponins, C- Phenolic Compounds, D- Flavonoids, E- Tannins,

F- Terpenoids, G- Steroids)


Table 1: Qualitative Analysis Of Phytochemicals (‘+++’ – High Expression, ‘++’ - Moderate Expression, ‘+’ - Low Expression,

‘-’ – Absent)


       
            Screenshot 2024-08-31 200458.png
       

    


Quantitative estimation of phytochemicals

Phenols

Quantity of phenol from methanolic extract of G. gummi-gutta rind is calculated using the equation y = 0.408x + 1.0722 from the standard curve of gallic acid (Figure 4, Figure 5,

Table 2, and Table 3).


       
            Picture5.jpg
       

    Figure 4: Quantitative Estimation Of Phenols


Table 2: Absorbance Value Of Gallic Acid And Rind Extract


       
            Screenshot 2024-08-31 200518.png
       

    


       
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    Figure 5: Standard Curve Of Gallic Acid

 

Table 3: Quantity Of Phenol In Rind Extract

       
            Screenshot 2024-08-31 200538.png
       

    


Tannins

Quantity of tannin from methanolic extract of G. gummi-gutta rind and fruit is calculated using the equation y = 1.0055x + 0.0267 from the standard curve of tannic acid (Figure 6, Figure 7, Table 4, and Table 5).     


       
            Picture5.jpg
       

    Figure 6: Quantitative Estimation Of Tannins


Table 4: Absorbance Value Of Tannic Acid, Rind And Fruit Extract

       
            Screenshot 2024-08-31 200556.png
       

    


       
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    Figure 7:  Standard Curve Of Tannic Acid


Table 5: Quantity Of Tannin In Rind And Fruit Extract


       
            Screenshot 2024-08-31 200637.png
       

    


Alkaloids

Quantity of alkaloid from methanolic extract of G. gummi-gutta rind is calculated using the equation y = 0.024x + 0.0096 from the standard curve of quercetin (Figure 8, Figure 9, Table 6, and Table 7).


       
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    Figure 8: Quantitative Estimation Of Alkaloids


Table 6: Absorbance Value Of Quercetin And Rind Extract

       
            Screenshot 2024-08-31 200708.png
       

    


       
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    Figure 9: Standard Curve Of  Quercetin


Table 7: Quantity Of Alkaloid In Rind Extract

       
            Screenshot 2024-08-31 200651.png
       

    


Flavonoids

Quantity of phenol from methanolic extract of G. gummi-gutta rind and fruit is calculated using the equation y = 2.25x + 0.226 from the standard curve of quercetin (Figure 10, Figure 11,

Table 8, and Table 9).


       
            Picture11.jpg
       

    Figure 10: Quantitative Estimation Of Flavonoids


Table 8: Absorbance Value Of Quercetin, Rind And Fruit  Extract


       
            Screenshot 2024-08-31 200708.png
       

    



       
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    Figure 11: Standard Curve Of Quercetin?


Table 9: Quantity Of Flavonoid In Rind And Fruit Extract   

 

Anti-oxidant activity

Anti-oxidant property was determined using DPPH assay with ascorbic acid as standard (Figure 12). The absorbance value of control at 515 nm is 1.836 (Table 10). The percentage of DPPH activity is displayed in Figure 13 and IC50 value of G. gummi-gutta rind is 117.42 µg/mL and fruit is 278.11 µg/mL.


       
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    Figure 12: Dpph Assay- Anti-Oxidant Activity Of Ascorbic Acid, Rind And Fruit Extract


Table 10: Absorbance Value Of Ascorbic Acid, Rind And Fruit Extract


       
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    Figure 13: Dpph Scavenged % By Ascorbic Acid, Rind And Fruit Extract

 

Anti-diabetic activity

Anti-diabetic property is determined using ?-amylase inhibition assay with acarbose as standard (Figure 14). The absorbance value of control at 540 nm is 2.150 (Table 11). The percentage of ?-amylase inhibition is displayed in Figure 15 and IC50 value of G. gummi-gutta rind is 169.61 µg/mL and fruit is 970.57 µg/mL.


       
            Picture13.jpg
       

    Figure 14: ?-Amylase Inhibition Assay- Anti-Diabetic Activity Of Acarbose, Rind And Fruit Extract


Table 11: Absorbance Value Of Acarbose, Rind And Fruit


       
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    Figure 15: % ?-Amylase Inhibition By Acarbose, Rind And Fruit Extract


       
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    Figure 16: Mtt Assay- Mcf-7 Cancer Cell Lines After Treated With Different Concentrations Of Rind Extract For 24 H


Table 12: Mtt Assay- % Of Cell Viability And Inhibition Of Mcf-7 Cancer Cell Lines Against Rind Extract


       
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    Figure 17: ?ll Viability Of Mcf-7 Cell Lines Against Rind Extract


       
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    Figure 18: % Of Inhibition Of Mcf-7 Cell Lines Against  Rind Extract


Anti-inflammatory activity

Anti-inflammatory property was determined using protein denaturation assay with diclofenac as standard (Figure 19). The absorbance value of control at 660 nm is 1.642 (Table 13). The percentage inhibition of BSA denaturation is showed in Figure 20 and IC50 value of G. gummi-gutta rind is 116.14 µg/mL and fruit is 86.50 µg/mL.


       
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    Figure 19: Protein Denaturation Assay-  Anti-Inflammatory Activity Of Diclofenac,  Rind And Fruit Extract


Table 13: Absorbance Value Of Diclofenac, Rind And Fruit

       
            Screenshot 2024-08-31 200842.png
       

    


       
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    Figure 20: % Of Inhibition Of Bsa Denaturation By Diclofenac, Rind And Fruit Extract


Wound healing activity

Scratch wound assay is performed on L929 cell lines to determine the wound healing activity (Figure 21). % of wound closure is displayed in Table 14 and Figure 22. The IC50 value of                G. gummi-gutta rind extract is 29.19µg/mL.                                        


       
            Picture22.jpg
       

    Figure 21: Wound Scratch Assay- Wound Healing Activity Of Rind Extract Against L929 Cell Lines After 24 H Incubation


Table 14: % Of Wound Closure Of L929 Cell Lines Aganst Rind Extract


       
            Screenshot 2024-08-31 200901.png
       

    


       
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    FIGURE 22: % OF WOUND CLOSURE OF L929 CELL LINES AGAINST RIND EXTRACT


Anti-ulcer activity

Anti-ulcer activity was determined using acid neutralizing capacity method (Figure 23 and Table 15).?


       
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    FIGURE 23: ACID NEUTRALIZING CAPACITY METHOD- ANTI-ULCER ACTIVITY OF GELUSIL, RIND AND FRUIT EXTRACT


TABLE 15: ACID NEUTRALIZING CAPACITY OF GELUSIL, RIND AND FRUIT EXTRACT


       
            Screenshot 2024-08-31 200927.png
       

    


Anti-microbial activity

Anti-microbial activity was assessed through agar well diffusion method. Both rind (Figure 24) and fruit extract (Figure 25) demonstrated significant anti-bacterial properties against both gram-positive bacteria (Bacillus sphaericus and Staphylococcus aureus) and gram-negative bacteria (Klebsiella pneumoniae and Pseudomonas aeruginosa). However, no activity was showed against fungi (Aspergillus niger). Zone of inhibition of rind and fruit is displayed in Table 16 and Table 17.


       
            Picture25.jpg
       

    FIGURE 24: ANTI-MICROBIAL ACTIVITY OF RIND EXTRACT AGAINST BACILLUS SPHAERICUS (A), STAPHYLOCOCCUS AUREUS (B), KLEBSIELLA PNEUMONIA (C), PSEUDOMONAS AERUGINOSA (D), AND ASPERGILLUS NIGER (E)


       
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    FIGURE 25: ANTI-MICROBIAL ACTIVITY F FRUIT EXTRAC AGAINST BACILLUS SPHAERICUS (A), STAPHYLOCOCCUS AUREUS (B), KLEBSIELLA PNEUMONIA (C), PSEUDOMONAS AERUGINOSA (D), AND ASPERGILLUS NIGER (E)


TABLE 16: ZONE OF INHIBITION FOR DIFFERENT MICRRGANISM AGAINST RIND EXTRACT


       
            Screenshot 2024-08-31 200959.png
       

    


TABLE 17: ZONE OF INHIBITION FOR DIFFERENT MICROORGANISM AGAINST FRUIT EXTRACT


       
            Screenshot 2024-08-31 200959.png
       

    


DISCUSSION

This study emphasizes the phytochemical composition and therapeutic properties of                           G. gummi-gutta, highlighting its anti-oxidant, anti-diabetic, anti-cancerous, anti-inflammatory, wound healing, anti-ulcer, and antimicrobial activities. Qualitative screening of methanolic extract revealed the presence of flavonoids, alkaloids, tannins, and phenols in the rind, while only flavonoids and tannins were found in the fruit. Similar results were reported in a previous study [6]. Further quantification methods were incorporated to determine the quantities of the aforementioned phytochemicals. However, saponins, terpenoids, and steroids were absent in both extracts. The anti-oxidant activity of G. gummi-gutta rind extract is attributed to flavonoids, phenols, and tannins, while the fruit extract's activity is due to flavonoids and tannins. Studies have shown similar antioxidant effects of these compounds [4, 8]. The highest % DPPH scavenging was observed at 500?g/mL (88.89% for rind and 70.75% for fruit extract), indicating optimal anti-oxidant activity at this concentration. These findings suggest that G. gummi-gutta extracts can protect cells from oxidative stress, contributing to health benefits from antioxidant-rich diets [4]. The anti-diabetic activity of G. gummi-gutta is attributed to phenolic compounds and flavonoids [1, 45]. Rind extract consistently demonstrated high ?-amylase inhibition across concentrations (47.21% to 55.86%), with the highest inhibition at 250?g/mL, indicating its effectiveness in enzyme inhibition even at low concentrations. The fruit extract showed a variable inhibition pattern, with minimal inhibition at lower concentrations (50?g/mL and 100?g/mL) due to insufficient bioactive compounds. Significant inhibition began at 150?g/mL (1.54%) and increased to 14.19% at 250?g/mL. This suggests that higher concentrations provide enough bioactive compounds, such as phenolic compounds and flavonoids, to effectively inhibit                    ?-amylase [1, 45]. Overall, G. gummi-gutta rind and fruit extracts hold potential as anti-diabetic agents by inhibiting ?-amylase and managing postprandial blood glucose levels by slowing down carbohydrate digestion [1]. The anti-cancer activity was due to the presence of phenols, flavonoids, alkaloids, and tannins [23, 46]. The rind extract showed cytotoxic activity against MCF-7 cells, with a dose-dependent increase in inhibition up to 100?g/mL, where it reaches 32.08%. Overall, the optimal concentration for the extract's efficacy was around 100-200 ?g/mL, beyond which its effectiveness does not improve. A recent study also showed the anti-proliferative activity of           G. gummi-gutta peel and seed extract against MCF-7 cancer cell lines [47]. The anti-inflammatory activity of G. gummi-gutta is attributed to phenols and flavonoids [48]. The rind extract consistently showed high inhibition across all concentrations, indicating strong and stable anti-inflammatory potential. In contrast, the fruit extract exhibited significant variability, with sharp drops at 200 µg/mL and 300 µg/mL, suggesting limited efficacy at higher concentrations. The rind extract's consistent performance indicates stable anti-inflammatory compounds, beneficial for conditions like fevers, pain, migraines, and arthritis, while the fruit extract's efficacy is more complex [49]. The wound healing activity of G. gummi-gutta on L929 cell lines were previously unreported. The wound healing activity was attributed to flavonoids, phenols, and tannins and was evaluated on L929 cell lines [50]. The rind extract showed optimal efficacy at 50µg/mL, achieving 87.45% wound closure. This indicates that at this concentration, the bioactive compounds in the extract are highly effective in promoting wound healing by accelerating the repair of damaged tissues, making them useful in the treatment of cuts, burns, and other skin injuries, promoting faster recovery [14, 27]. At lower concentrations (10 µg/mL), the extract may not contain enough bioactive compounds to promote healing effectively. Most wound healing studies on                         G. gummi-gutta have focused on in-vivo models in mice, with limited in-vitro studies such as those on nasal epithelial cells [51].

The anti-ulcer activity of methanolic extract of G. gummi-gutta rind and fruit was due to the presence of flavonoids and tannins [52]. The data indicates that antacids with higher concentrations of active ingredients generally require less NaOH to neutralize acids, reflecting greater acid-neutralizing capacity per gram. The fruit and rind extracts exhibited the highest anti-ulcer activity at 100 mg/mL, with acid neutralizing capacities significantly higher than the commercial antacid Gelusil. This indicates an optimal concentration around 100 mg/mL for maximum effectiveness in prevention and healing of gastric ulcers, providing a natural alternative or complement to conventional ulcer treatments. The antimicrobial activity of fruit and rind extracts showed a concentration-dependent increase in inhibition zones, with higher concentrations generally providing more significant microbial inhibition [53].  The fruit extract tends to be more effective against K. pneumonia compared to rind extract. However, it was observed that the fungi A. niger showed resistance to methanol extract of the rind and fruit indicating limited antifungal properties, which supports the results reported in previous studies [54, 55]. The antibacterial properties of the extract were due to the presence of phytochemicals such as tannins, phenols, and flavonoids in G. gummi-gutta rind, as well as flavonoids and tannins in G. gummi-gutta fruit [8]. These findings highlight the potential of G. gummi-gutta extracts as antimicrobial agents, particularly against certain bacterial strains.

CONCLUSION:

The present study was aimed at the therapeutic efficacy of G. gummi-gutta rind and fruit, which showed prominent anti-oxidant, anti-diabetic, anti-cancer, anti-inflammatory, wound healing, anti-ulcer, and anti-microbial activities. Moreover, the phytochemicals phenols, tannins, flavonoids, and alkaloids were confirmed in the methanolic extract of G. gummi-gutta rind and fruit. Additionally, our study focused on in-vitro assays, which provided remarkable evidence of the therapeutic efficacy of G. gummi-gutta rind and fruit against various disease conditions such as cardiovascular disease, diabetes, inflammation, ulcer, cancer, wounds, bacterial infections, etc. Further studies on in-vivo models and clinical trials might generate more information about its therapeutic mechanism and translational potential.

CONFLICT OF INTEREST

The authors declare no conflict of interest.

ACKNOWLEDGMENT

I would like to thank God for the blessings necessary to successfully accomplish this work.                 I would like to express my special gratitude to my supervisor, Dr. Parvathy Prasad, who constantly provided encouragement, guidance, and support throughout this project.         

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  35. Ajanal M, Gundkalle MB and Nayak SU: Estimation of total alkaloid in Chitrakadivati by UV-Spectrophotometer, Ancient Science of Life (2012), 31(4): 198-201.
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Reference

  1. Semwal RB, Semwal DK, Vermaak I and Viljoen A: A comprehensive scientific overview of Garcinia cambogia, Fitoterapia (2015), 102: 134-148.
  2. Abraham Z, Malik SK, Rao GE, Narayanan SL and Biju S: Collection and Characterization of Malabar Tamarind (Garcinia cambogia (Gaertn.) Desr.), Genetic Resources and Crop Evolution (2006), 53: 401-406.
  3. Hart C and Cock IE: An examination of the antimicrobial and anticancer properties of Garcinia cambogia fruit pericarp extracts, BEMS Reports (2016), 2: 55-63.
  4. Sudharani N, Umadevi SH, Naik H, Shobha D, Jamuna KV and Shivaprakash: Estimation of bioactive components and antioxidant activity of garcinia gummigutta fruit rind, Journal of Pharmacognosy and Phytochemistry (2018), 7(3S): 467-470.
  5. Tan WN, Tong WY, Leong CR, Kamal NNSNM, Muhamad M, Lim JW et al: Chemical Composition of Essential Oil of Garcinia gummi-gutta and Its Antimicrobial and Cytotoxic Activities, Journal of Essential Oil Bearing Plants (2020), 23(4): 832-842.
  6. Madappa MB and Bopaiah AK: Preliminary phytochemical analysis of leaf of Garcinia gummigutta from Western Ghats, IOSR Journal of Pharmacy and Biological Sciences (2012), 4(1): 17-27.
  7. Ko?odziejczyk J, Masullo M, Olas B, Piacente S and Wachowicz B: Effects of garcinol and guttiferone K isolated from Garcinia cambogia on oxidative/nitrative modifications in blood platelets and plasma, Platelets (2009), 20(7): 487-492.
  8. Devasia JV and Cherian P: Phytochemical and antibacterial effect of dry fruits of Garcinia Gummi-Gutta (L.) Roxb, International Journal of Pharma and Bio Sciences (2020), 11(4): 121-128.
  9. Iinuma M, Ito T, Miyake R, Tosa H, Tanaka T and Chelladurai V: A xanthone from Garcinia cambogia, Phytochemistry (1998), 47(6): 1169-1170.
  10. Masullo M, Bassarello C, Suzuki H, Pìzza C and Piacente S: Polyisoprenylated benzophenones and an unusual polyisoprenylated tetracyclic xanthone from the fruits of Garcinia cambogia, Journal of Agricultural and Food Chemistry (2008), 56(13): 5205-5210.
  11. Pandey R, Chandra P, Kumar B, Srivastva M, Aravind APA, Shameer PS et al: Simultaneous determination of multi-class bioactive constituents for quality assessment of Garcinia species using UHPLC–QqQ LIT –MS/MS, Industrial Crops and Products (2015), 77: 861-872.
  12. Kumar S, Sharma S and Chattopadhyay SK: High-performance liquid chromatography and LC-ESI-MS method for identification and quantification of two isomeric polyisoprenylated benzophenones isoxanthochymol and camboginol in different extracts of Garcinia species, Biomedical Chromatography (2009), 23(8): 888-907.
  13. Rao AVR, Venkatswamy G and Pendse D: Camboginol and cambogin, Tetrahedron Letters (1980), 21(20): 1975-1978.
  14. Patrick M, Zohdi WNWM, Muid SA and Omar E: Alpha-Mangostin (Garcinia mangostana Linn.) and its potential application in mitigating chronic wound healing, Malaysian Applied Biology (2022), 51(2): 1-8.
  15. Hima CS, Chitra CN and Asheeta A: In-vitro antioxidant activities of leaves and fruit rind extracts of Garcinia gummi-gutta (G.cambogia), Journal of Pharmaceutical Sciences and Research (2023), 15(8): 1198-1205.
  16. Sripradha R, Sridhar MG and Maithilikarpagaselvi N: Antihyperlipidemic and antioxidant activities of the ethanolic extract of Garcinia cambogia on high fat diet-fed rats, Journal of Complementary and Integrative Medicine (2015), 13(1): 9-16.
  17. Parcheta M, ?wis?ocka R, Orzechowska S, Akimowicz M, Choi?ska R and Lewandowski W: Recent developments in effective antioxidants: the structure and antioxidant properties, Materials (2021), 14(8): 1984.
  18. Chauhan A, Sharma PK, Srivastava P, Kumar N and Dudhe R: Plants having potential antidiabetic activity: a review, Der Pharmacia Lettre (2010), 2(3): 369-387.
  19. Mamun-or-Rashid A, Shamim HM, Hassan N, Kumar DB, Ashrafuzzaman SM and Sen MK: A review on medicinal plants with antidiabetic activity, Journal of Pharmacognosy and Phytochemistry (2014), 3(4): 149-159.
  20. Kan WLT, Yin C, Xu HX, Xu G, To KKW, Cho CH et al: Antitumor effects of novel compound, guttiferone K, on colon cancer by p21Waf1/Cip1-mediated G0/G1 cell cycle arrest and apoptosis, International Journal of Cancer (2012), 132(3): 707-716.
  21. Matsumoto K, Akao Y, Ohguchi K, Ito T, Tanaka T, Iinuma M et al: Xanthones induce cell-cycle arrest and apoptosis in human colon cancer DLD-1 cells, Bioorganic & Medicinal Chemistry (2005), 13(21): 6064-6069.
  22. Schobert R and Biersack B: Chemical and biological aspects of garcinol and isogarcinol: recent developments, Chemistry & Biodiversity (2019), 16(9): e190036.
  23. Ohiagu FO, Chikezie PC, Chikezie CM and Enyoh CE: Anticancer activity of Nigerian medicinal plants: a review, Future Journal of Pharmaceutical Sciences (2021), 7: 70.
  24. Azab A, Nassar A and Azab AN: Anti-inflammatory activity of natural products, Molecules (2016), 21(10): 1321.
  25. Choudhury B, Kandimalla R, Elancheran R, Bharali R and Kotoky J. Garcinia morella fruit, a promising source of antioxidant and anti-inflammatory agents induces breast cancer cell death via triggering apoptotic pathway, Biomedicine & Pharmacotherapy (2018), 103: 562-573.
  26. Souza HR, Zucoloto AR, Francisco ITP, Rays HP, Tinti NP, Matta NJD et al: Evaluation of the healing properties of Garcinia brasiliensis extracts in a cutaneous wound model, Journal of Ethnopharmacology (2022), 295: 115334.
  27. Gondokesumo ME, Sumitro SB, Handono K, Pardjianto B, Widowati W and Utomo DH: A computational study to predict wound healing agents from the peel of the mangosteen (Garcinia mangostana Linn) fruit, Institute Journal Bio Automation (2020), 24(3): 265-276.
  28. Menke NB, Ward KR, Witten TM, Bonchev DG and Diegelmann RF: Impaired wound healing, Clinics in Dermatology (2007), 25(1): 19-25.
  29. Vimala G and Shoba FG: A review on antiulcer activity of few Indian medicinal plants, International Journal of Microbiology (2014), 2014: 519590.
  30. Jacob KMP, Ali MA, Vishnu H, Shylaja G, Mythili S and Sathiavelu A: Evaluation of antibacterial and antioxidant activity of Garcinia gummigutta, International Journal of Drug Development and Research (2015), 7(3): 62-64.
  31. Edirisinghe EAHE, Nawarathna SB, Marapana RAUJ and Jaysinghe J: Extraction, crystallization, preservation, pelletizing, and quantification of hydroxy citric acid from Garcinia cambogia, International Journal of Innovative Research in Technology (2015), 2(4): 3-10.
  32. Shaikh JR and Patil M: Qualitative tests for preliminary phytochemical screening: An overview, International Journal of Chemical Studies (2020), 8(2): 603-608.
  33. Siddiqui N, Rauf A, Latif A and Mahmood Z: Spectrophotometric determination of the total phenolic content, spectral and fluorescence study of the herbal Unani drug Gul-e-Zoofa (Nepeta bracteata Benth), Journal of Taibah University Medical Sciences (2017), 12(4): 360-363.
  34. Ci KC and Indira G: Quantitative estimation of total phenolic, flavonoids, tannin and chlorophyll content of leaves of Strobilanthes Kunthiana (Neelakurinji), Journal of Medicinal Plants Studies (2016), 4(4): 282-286.
  35. Ajanal M, Gundkalle MB and Nayak SU: Estimation of total alkaloid in Chitrakadivati by UV-Spectrophotometer, Ancient Science of Life (2012), 31(4): 198-201.
  36. P?kal A and Pyrzy?ska K: Evaluation of aluminium complexation reaction for flavonoid content assay, Food Analytical Methods (2014), 7: 1776-1782.
  37. Chaves N, Santiago A and Alias JC: Quantification of the antioxidant activity of plant extracts: analysis of sensitivity and hierarchization based on the method used, Antioxidants (2020), 9(1): 76.
  38. Wickramaratne MN, Punchihewa JC and Wickramaratne DBM: In-vitro alpha amylase inhibitory activity of the leaf extracts of Adenanthera pavonina, BMC Complementary and Alternative Medicine (2016), 16: 466.
  39. Ozdemir KG, Y?lmaz H and Y?lmaz S: In vitro evaluation of cytotoxicity of soft lining materials on L929 cells by MTT assay, Journal of Biomedical Materials Research Part B: Applied Biomaterials (2008), 90B(1): 82-86.
  40. Anyasor GN, Okanlawon AA and Ogunbiyi B: Evaluation of anti-inflammatory activity of Justicia secunda Vahl leaf extract using in vitro and in vivo inflammation models, International Journal of Phytomedicine and Phytotherapy (2019), 5: 49.
  41. Varankar SS and Bapat SA: Migratory Metrics of Wound Healing: A Quantification Approach for in vitro Scratch Assays, Frontiers in Oncology (2018), 8: 633.
  42. Pandian P: In-vitro evaluation of antiulcer activity of aqueous extract of Malvastrum tricuspidatum, International Journal of Pharmaceutical Sciences and Research (2021), 12(3): 1811-1815.
  43. Bongoni R: Antibacterial and Antifungal activities of Linum Usitatissimum, International Journal of Pharmacy Education and Research (2016), 3(2): 4-8.
  44. Bykkam S, Rao V, Chakra S and Thunugunta T: Synthesis and characterization of graphene oxide and its antimicrobial activity against Klebsiella and Staphylococcus, International Journal of Advanced Biotechnology and Research (2013), 4(1): 1005-1009.
  45. Jamila N, Khan N, Hwang IM, Nho EY, Choi JY, Atlas A et al: Application of phytochemical and elemental profiling, chemometric multivariate analyses, and biological activities for characterization and discrimination of fruits of four Garcinia species, Analytical Letters (2020), 53(1): 122-139.
  46. Greenwell M and Rahman PKSM: Medicinal Plants: their use in anticancer treatment, International Journal of Pharmaceutical Sciences and Research (2015), 6(10): 4103-4112.
  47. Ahmad NE, Bakar MFA, Suleiman M, Bakar FIA, Sabran SF and Kormin F: Antiproliferative activity of five Garcinia species collected in Sabah, Malaysian Borneo against estrogen receptor-human breast carcinoma (MCF-7) cell line, IOP Conference Series: Earth and Environmental Science (2021), 736(1): 012004.
  48. Daïrou H, Adèle EM, Njini NG, Souza HR, Yoshikawa A, Adéline FYS et al: Antioxidant capacity and anti-inflammatory activity of Garcinia kola (Heckel) stem bark extracts, International Journal of Herbal Medicine (2019), 9(1): 16-27.
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  50. Addis R, Cruciani S, Santaniello S, Bellu E, Sarais G, Ventura C et al: Fibroblast proliferation and migration in wound healing by phytochemicals: evidence for a novel synergic outcome, International Journal of Medical Sciences (2020), 17(8): 1030-1042.
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Parvathy Prasad
Corresponding author

Bioroot Exploration India Pvt Ltd

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Abhirami AB
Co-author

BiorootExploration India Pvt Ltd

Abhirami A. B. , Parvathy Prasad , Evaluating The Therapeutic Potential Of Garcinia Gummi-Gutta, Int. J. of Pharm. Sci., 2024, Vol 2, Issue 8, 4058-4082. https://doi.org/10.5281/zenodo.13623311

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