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Year : 2008  |  Volume : 40  |  Issue : 6  |  Page : 271-275

Gastroprotective effect of Benincasa hispida fruit extract

1 Department of pharmacology, S. J. Thakkar Pharmacy College, Rajkot, Gujarat, India
2 Department of pharmacology, L. M. College of Pharmacy, Ahmedabad, Gujarat, India

Date of Submission23-Oct-2007
Date of Decision11-Sep-2008
Date of Acceptance12-Sep-2008

Correspondence Address:
Manish A Rachchh
Department of pharmacology, S. J. Thakkar Pharmacy College, Rajkot, Gujarat
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0253-7613.45154

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 » Abstract 

Objectives: The antiulcer activity of Benincasa hispida (Thunb.) Cogn. fruit was evaluated in rats against ethanol-induced gastric mucosal damage, pylorus ligated (PL) gastric ulcers, and cold restraint-stress (CRS)-induced gastric ulcer models.
Methods: Petroleum ether and methanol extracts were administrated orally at the dose of 300 mg/kg, and omeprazole (reference standard) at the dose of 20 mg/kg. Ulcer index was common parameter studied in all the models. Further, vascular permeability was evaluated in ethanol model, and effect on lipid peroxidation, viz. melondialdehyde (MDA) content, superoxide dismutase (SOD), and catalase (CAT) levels were studied in CRS model.
Results: Both the extracts produced significant reduction in ulcer index (P < 0.05) in all the models and the results were comparable with that of omeprazole-treated group. Further, significant reduction in vascular permeability (P < 0.05) was observed. In CRS model, MDA content was significantly reduced along with increase in CAT levels as compared to control group.
Conclusions: Petroleum ether and methanol extracts of B. hispida possess significant antiulcer as well as antioxidant property.

Keywords: Antiulcer, antioxidant, ulcer index, vascular permeability

How to cite this article:
Rachchh MA, Jain SM. Gastroprotective effect of Benincasa hispida fruit extract. Indian J Pharmacol 2008;40:271-5

How to cite this URL:
Rachchh MA, Jain SM. Gastroprotective effect of Benincasa hispida fruit extract. Indian J Pharmacol [serial online] 2008 [cited 2023 May 31];40:271-5. Available from: https://www.ijp-online.com/text.asp?2008/40/6/271/45154

 » Introduction Top

Benincasa hispida (Thunb) Cogn. (Family: Cucurbitaceae) is commonly known as Bhuru Kolu or Safed Kolu (Gujarati), Petha (Hindi), white pumpkin or wax gourd or ash gourd (English), and Kushmanda (Sanskrit). Fruits of this plant are traditionally used as a laxative, diuretic, tonic, aphrodisiac, cardiotonic, urinary calculi, blood disease, insanity, epilepsy, and also in cases of jaundice, dyspepsia, fever, and menstrual disorders. [1]

The methanolic extract of the fruit is reported to possess antiulcer, [2] anti-inflammatory, [3] antihistaminic, and antidepressant activities. [4] Phytochemical review indicates the presence of triterpenes: alnusenol, multiflorenol, iso-multiflorenol; flavone: iso-vitexin; and sterols: lupeol, lupeol acetate, and beta-sitosterol. [5]

A number of cucurbitaceae plants [6],[7] have been shown to possess antiulcer and antioxidant activity, viz. Cucurbita moschata (Fruit), Momordica charantia (Immature fruits), Cucumis melo (Mature fruit), etc. Hence, the objective of the present study was to evaluate gastroprotective effect of methanol and petroleum ether extracts of B. hispida fruit using different experimental models.

 » Materials and Methods Top

Collection of plant

The fresh fruit of B. hispida was collected in the month of September 2004 from the local vegetable market of Ahmedabad, Gujarat. The authentification of the plant was done in the department of Pharmacognosy, L. M. College of Pharmacy, Ahmedabad, Gujarat, India.

Extraction procedure

The fruit was dried, seeds were separated and powdered, and passed to 60 mesh. The powder of fruit (500 g) was first defatted with petroleum ether (500 ml x 6; yield was 1% w/w). The defatted powder was then dried and extracted with methanol (500 ml x 6; yield was 20% w/w) and thereafter with ethyl acetate (500 ml x 4; yield was 3% w/w) successively. The remaining powder was dried and extracted with distilled water to give aqueous extract (500 ml x 6; yield was 5% w/w). The dried fractions were stored in a refrigerator at 4 °C throughout the study.

Preliminary thin layer chromatography (TLC) study was carried out for checking the presence of phytoconstituents as beta-sitosterol, lupeol, iso-vitexin, iso-multiflorenol, cucurbitacin-B, different amino acids, etc. which have been reported to be present in the fruit of B. hispida . Further, quantitative estimation of phytoconstituents using high pressure thin layer chromatography (HPTLC) fingerprinting was also carried out for both the extracts using RP-18 silica,briefed as follows:

1. Betasitosterol in petroleum ether extract (PEBH)

Petroleum ether: Acetonitrile : Methanol (1:2:2)

2. Lupeol in PEBH

Benzene: Ethyl acetate (9.5: 0.5)

3. Iso-vitexin in methanol extract (MEBH)

Ethyl acetate: n-butanol: Water (2:1:3)


Wistar albino rats of either sex, weighing between 200-250 g were fed with standard chow diet. All animals were kept under a controlled light/dark cycle and temperature (22 ± 2 O C) with free access to food and water. This experiment complied with the guidelines for animal experimentation of our laboratory and approved by Institutional Animal Ethics Committee (IAEC).


Absolute alcohol (Alembic Chemicals Works, India), omeprazole (Zydus Research Centre, India), Evan's blue (Qualigens, India), thiobarbituric acid (Sigma Aldrich, USA), adrenaline bitarterate (Camphossa, India), and hydrogen peroxide (S.D. Fine Chemicals Pvt. Ltd, India) were used in the experiment.

Experimental design

The animals were divided into following groups of six animals each. Preliminary study using different doses of petroleum ether, methanol, ethyl acetate, and aqueous extracts against ethanol-induced gastric mucosal damage revealed significant protection at the dose of 300 mg/kg (p.o.). Further study was carried out using petroleum ether (PEBH) and methanol extracts (MEBH) as they showed marked protection against gastric lesions as compared to other extracts.

  • Group 1 (control): Animals received only aqueous suspension of 1% w/v sodium carboxy methyl cellulose (Sod. CMC) as vehicle.
  • Group 2 (test 1): Animals received PEBH (300 mg/kg, p.o.).
  • Group 3 (test 2): Animals received MEBH (300 mg/kg, p.o.).
  • Group 4 (standard): Animals received omeprazole (20 mg/kg, p.o.).

Ethanol-induced gastric mucosal damage [8]

In addition, ethyl acetate (300 mg/kg, p.o.) and aqueous extract (300 mg/kg, p.o.) were also tested in this model. Animals were fasted for 16 h before an experiment but were allowed free access to water. One milliliter of absolute ethanol was administered orally to rats. In treatment group, drugs were administered orally 1 h before the administration of ethanol. After 2 h of ethanol treatment, animals were sacrificed; stomachs were removed, opened along the greater curvature, and examined for lesions. Lesion severity was determined by measuring ulcer index.[9] Additionally, vascular permeability was determined in case of MEBH and PEBH treated groups. [10]

Pylorus ligated ulcer model [11]

Rats (16-h fasted) were anesthetized with light ether anesthesia. A portion of the abdomen was opened by a small incision below the xiphoid process. Pyloric portion of the stomach was slightly lifted out avoiding traction to the pylorus or damage to its blood supply. The stomach was replaced carefully and interrupted sutures closed the abdominal wall. The drugs were administered orally and animals were sacrificed at the end of 6 h after operation. Stomach was dissected out; contents were drained into tubes and subjected to analysis for different physical parameters as well as acid secretory and mucoprotective parameters. [12]

Cold and restraint stress-induced gastric ulcer model [13]

In this method, Wistar rats were deprived of food for 12 h. They were then immobilized in a restrainer (stress cage) and forced to remain in refrigerator (4-6 º C) for 3 h. The animals were sacrificed using high dose of ether and ulcer-index was calculated. The test drug was administered orally 30 min before immobilizing the animals. In this model, free radical levels were also tested to determine the extent of lipid peroxidation, viz. melondialdehyde (MDA), [14] superoxide dismutase (SOD) [15] and catalase (CAT). [16]

Statistical analysis

The results were expressed in terms of mean ± SEM. Significance was determined by one-way analysis of variance followed by the Tukey's multiple range test. Statistical analysis was performed using statistical analysis software Sigma Stat 2.0. In each case P values less than 0.05 were considered as indicative of significance.

 » Results Top

Thin layer chromatographic study suggested the presence of beta-sitosterol and lupeol in PEBH and presence of iso-vitexin in case of MEBH.

High pressure thin layer chromatography study revealed the presence of 6.52% w/w of beta-sitosterol and 2.48% w/w of lupeol in PEBH which are equivalents to 0.013% w/w and 0.0049% w/w in dry powder, respectively. The level of iso-vitexin in MEBH was 0.85% w/w which is equivalent to 0.17% w/w in dry powder.

Ethanol-induced gastric mucosal damage

Different extracts of B. hispida , viz. PEBH, MEBH, and ethyl acetate extract (300 mg/kg, p.o.) showed significant reduction ( P < 0.05) in ulcer index when compared with the control group and results were comparable with that of omeprazole-treated rats [Table 1]. However, reduction in ulcer index with aqueous extract pretreatment was not found to be statistically significant. Further, PEBH and MEBH pretreatment resulted in significant reduction in vascular permeability [Figure 1].

Pylorus ligation model

PEBH and MEBH treated animals showed significant reduction ( P < 0.05) in ulcer index [Table 1]. MEBH and omeprazole treatment showed significant reduction ( P < 0.05) in volume of acid secretion, acid output, pepsin activity, and protein content along with significant increase in pH, carbohydrate content, and TC:PR ratio (mucin activity). PEBH showed significant reduction ( P < 0.05) in pepsin activity and protein content along with increase in carbohydrate content and TC:PR ratio (mucin activity) [Table 2].

Cold restraint stress-induced gastric ulcer model

PEBH and MEBH treatment resulted in significant reduction in ulcer index and MDA contents along with increase in the CAT levels ( P < 0.05). However, no significant effect was observed on SOD levels [Table 1] and [Table 3].

 » Discussions Top

The observations of the present study suggest significant antiulcer activity of PEBH and MEBH of B. hispida against ethanol-, CRS-, and PL- induced gastric ulcers in rats.

Ethanol and several NSAIDS, such as aspirin, irritate the gastrointestinal mucosa in both human and animals and may, therefore, cause injury and bleeding. Ulcers caused by chemical inducers like ethanol are due to a number of contributing factors, which include effects on mucosal blood flow, platelet thrombi, damage to capillary endothelium, and release of arachidonate metabolites, leukotriene C4/D4 ( LTC4/D4), and platelet activating factor (PAF). [17] Involvement of free radicals is also reported for gastric ulceration caused by ethanol. [18] Thus, the protection afforded by MEBH and PEBH in ethanol model can be correlated to decrease in vascular permeability and thereby preventing damage to the capillary endothelium and release of arachidonate metabolites. However, MEBH showed better protection (67%) than PEBH (49%) which could be due to its marked antioxidant activity as shown in stress model.

Pylorus ligated induced ulcers are thought to be caused due to increased presence of acid and pepsin in the stomach. The essential criteria, which determine the status of mucosal defense barrier against the offensive assault of acid-pepsin is the quality and quantity of gastric mucus secretion. [19] Increased mucus secretion by the gasric mucosal cells can prevent gasric ulceration by several mechanisms including lessening stomach wall friction during peristalsis and acting as an effective barrier to the back diffusion of hydrogen ions. The TC/PR ratio has been accepted as a reliable index of mucosal resistance.[19] MEBH pretreatment have shown significant reduction in protein levels with corresponding increase in carbohydrate level leading to marked rise in mucin activity, although PEBH extract also significantly increased carbohydrate level with no change in protein levels. Hence, the protection afforded by MEBH and PEBH against gastric ulcers induced by PL appears to be produced by the suppression of pepsin levels and strengthening of mucosal barrier. Further, it is clear that the antiulcer activity against this model was again found to be more with MEBH extract.

Stress-induced ulcers are caused by a number of factors both physical and psychological. [20] Increase in gastric motility, vagal overactivity, mast cell degranulation, decreased mucosal blood flow, and decreased PG synthesis are reported to be involved in the genesis of stress-induced ulcers. [21],[22],[23] Free radicals are also involved in the gastric ulcer caused by stress. In stress-induced gastric ulceration, MDA levels significantly increases with concomitant decrease in SOD and CAT concentration as reported by Das and coworkers. [24] Increase in MDA levels results into increase in reactive oxygen species (ROS), the major radicals being superoxide anion, H 2 O 2 , and hydroxyl radical. These induce cell degranulation by increasing peroxidation of cell membrane lipids, causing loss of structural and functional integrity of cell membranes. Accumulation of the H 2 O 2 occurs in the mitochondria and cytosol, if not scavenged by CAT leads to increase in generation of OH - radical. Thus, decreased CAT levels lead to increased lipid peroxidation. [25] As shown in the results, PEBH and MEBH treatment significantly reverted the stress-induced changes in MDA and CAT, with no remarkable change in SOD activities. This reduction in MDA levels ( P < 0.05) along with significant increase in CAT levels strongly suggest decreased lipid peroxidation and antioxidant activity of PEBH and MEBH.

The present study reports the antiulcerogenic and antioxidant effect of petroleum ether and methanol extracts of B. hispida . The mechanism of its gastroprotective activity may be attributed to reduction in vascular permeability, free radical generation, and lipid peroxidation along with strengthening of mucosal barrier. Besides, presence of phytoconstituents in this plant like flavone and sterols might be responsible for these actions. Our future study will be directed to identify the phytoconstituents responsible for these pharmacological actions of B. hispida fruit.

 » References Top

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2.Grover JK, Adiga G, Vats V, Rathi SS. Extracts of Benincas hispida prevent development of experimental ulcers. J Ethnopharmacol 2001;78:159-64.  Back to cited text no. 2    
3.Chandrababu S, Umamaheshwari S. Studies on the anti-inflammatory activity of fruit rind extract of Benincasa hispida Cogn. Indian Drugs 2002;39:651-3.  Back to cited text no. 3    
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5.Yoshizumi S, Murakami T, Kadoya M, Matsuda H, Yamahara J, Yoshikawa M. Medicinal foodstuffs. XI. Histamine release inhibitors from wax gourd, the fruits of Benincasa hispida Cogn. Yakugaku Zasshi 1998;118:188-92.  Back to cited text no. 5    
6.Yang X, Zhao Y, Lv Y. Chemical composition and antioxidant activity of an acidic polysaccharide extracted from Cucurbita moschata Duchesne ex Poiret. J Agric Food Chem 2007;55:4684-90.  Back to cited text no. 6    
7.Gurbuz I, Akyuz C, Yesilada E, Sener B. Anti-ulcerogenic effect of Momordica charantia L. fruits on various ulcer models in rats. J Ethnopharmacol 2000;71:77-82.  Back to cited text no. 7    
8.Robert A, Nezamis JE, Lancaster C, Hanchar AJ. Cytoprotection by prostaglandins in rats- prevention of gastric necrosis produced by alcohol, HCl, NaOH, hypertonic NaCl and thermal injury. Gastroenterology 1979;77:433-43.  Back to cited text no. 8    
9.Goswami S, Jain S, Santani D. Anti-ulcer activity of cromakalin (BRL 34915), A potassium channel openers against experimentally induced gastric and duodenal ulcers in rats and guinea-pigs. J Pharm Pharmacol 1997;49:195-99.   Back to cited text no. 9    
10.Szabo S, Trier JS, Brown A, Schoor J. Early vascular injury and increase vascular permeability in gastric mucosal injury caused by ethanol. Gastroenterology 1985;88:228-36.   Back to cited text no. 10    
11.Shay M, Komarov SA, Fels D, Meranze D, Gruenstein H, Siplet H. A simple method for the uniform production of gastric ulceration in the rats. Gastroenterol 1945;5:43-61.   Back to cited text no. 11    
12.Rachchh MA, Shah MB, Santani DD, Goswami SS. Study of Chlorophytum arundinaceum against experimental gastric ulcer. Pharmaceutical Bio 2004;42:592-98.   Back to cited text no. 12    
13.Vincent GP, Glavin G, Rutkowski J, Pare W. Body orientation, food deprivation and potentiation of restraint-induced gastric lesions. Gastroent Clin Biol 1977;1:539-43.   Back to cited text no. 13    
14.Kiso Y, Tohkin M, Hikino H, Hattori M, Sakamoto T, Namba T. Mechanism of antihepatotoxic activity of glycyrrhizin-1: effect on free radical generation and lipid peroxidation. Planta Med 1984;50:298-302.   Back to cited text no. 14    
15.Misra HP, Fridovich I. The role of superoxide anion in the autoxidation of epinephrine and a simple assay for superoxide dismutase. J Bio Chem 1972;247:3170-75.   Back to cited text no. 15    
16.Aebi H. Methods in enzymatic analysis. Vol-3. 2nd ed. New-York: Academic press; 1974: p. 273.   Back to cited text no. 16    
17.Goel RK, Bhattacharya SK. Gastroduodenal mucosal defense and mucosal protective agents. Ind J Exp Biol 1991;29:701-14.  Back to cited text no. 17    
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19.Sanyal AK, Mitra PK, Goel RK. A modified method to estimate dissolved mucosubstances in gasric juice. Ind J Exp Biol 1983:21:78-80.  Back to cited text no. 19    
20.Miller TA. Mechanisms of stress related mucosal damage. Am J Med 1987;83:8-14.  Back to cited text no. 20    
21.Garrick T, Buack S & Bass P. Gastric motility is a major factor in cold restraint-induced lesion formation in rats. Am J Physiol 1986;250:G191-9.  Back to cited text no. 21    
22.Cho CH, Ogle CW, Dai S. Acute gastric ulcer formation in response to Electrical Vagal stimulation in rats. Eur J Pharmacy 1976;35:215-9.   Back to cited text no. 22    
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24.Das D, Bandopadhyay D, Bhattacharjee M, Banerjee RK. Hydroxyl radical is the major causative factor in stress induced gastric ulceration. Free radical Biol Med 1997;23:8-18.  Back to cited text no. 24    
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  [Figure 1]

  [Table 1], [Table 2], [Table 3]

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