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| ORIGINAL ARTICLE |
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| Year : 2010 | Volume
: 1
| Issue : 4 | Page : 415-418 |
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Analgesic and antipyretic activities of Momordica charantia linn. fruits
Roshan Patel, Naveen Mahobia, Nitin Upwar, Naheed Waseem, Hetal Talaviya, Zalak Patel
Shree Leuva Patel Trust Pharmacy Mahila College, Amreli, Gujarat, India
| Date of Web Publication | 3-Feb-2011 |
Correspondence Address:
Roshan Patel
Department of Pharmacognosy, Shree Leuva Patel Trust Pharmacy Mahila College, Patel Sankul, Chakkargadh Road, Amreli - 365 601, Gujarat
India
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/0110-5558.76441
 Abstract | | |
Plant Momordica charantia Linn. belongs to family Cucurbitaceae. It is known as bitter gourd in English and karela in Hindi. Earlier claims show that the plant is used in stomachic ailments as a carminative tonic; as an antipyretic and antidiabetic agent; and in rheumatoid arthritis and gout. The fruit has been claimed to contain charantin, steroidal saponin, momordium, carbohydrates, mineral matters, ascorbic acid, alkaloids, glucosides, etc. The ethanolic extract of the fruit showed the presence of alkaloids, tannins, glycosides, steroids, proteins, and carbohydrates. The present study was carried out using acetic acid-induced writhing and tail-immersion tests in mice, while yeast-induced pyrexia in rats. The ethanolic extracts (250 and 500 mg/kg, po.) showed an analgesic and antipyretic effect, which was significantly higher than that in the control rats. The observed pharmacological activities provide the scientific basis to support traditional claims as well as explore some new and promising leads. Keywords: Analgesic, antipyretic, Momordica charantia
How to cite this article:
Patel R, Mahobia N, Upwar N, Waseem N, Talaviya H, Patel Z. Analgesic and antipyretic activities of Momordica charantia linn. fruits. J Adv Pharm Technol Res 2010;1:415-8 |
How to cite this URL:
Patel R, Mahobia N, Upwar N, Waseem N, Talaviya H, Patel Z. Analgesic and antipyretic activities of Momordica charantia linn. fruits. J Adv Pharm Technol Res [serial online] 2010 [cited 2023 Feb 8];1:415-8. Available from: https://www.japtr.org/text.asp?2010/1/4/415/76441 |
| Introduction | |  |
Pain is an ill-defined, unpleasant, sensation usually evoked by an external or internal noxious stimulus. It is a warning signal and primarily protective in nature, but causes discomfort. Analgesics are the drugs that selectively relieve pain by acting on the CNS (central nervous system) or on peripheral pain mechanisms, without significantly altering consciousness. Plant Momordica charantia Linn., known as bitter gourd in English, belongs to family Cucurbitaceae. It is cultivated throughout India, Malaya, China, Tropical Africa, and America. Earlier claims showed that its bitter fruits have carminative, aphrodisiac, and anthelmintic properties, and are used in syphilis, rheumatism, troubles of spleen, and ophthalmia. It is also useful in piles, leprosy, jaundice, and also used as a vermifuge. [1] Upon a literature review, it was found that the plant contains moisture (83.2%), proteins (2.9%), fat (1.0%), carbon (9.8%), fibers (1.7%), mineral matters (1.4%), calcium, phosphorus, iron, carotene, thiamine, nicotinic acid, riboflavin, ascorbic acid (88 mg/100 g), copper, and potassium. [2] Charantin, β-sitosterol-glucoside, stigmast-5, 25-dien-3 β-O-glucoside, stigmast-7,25-dien-3 β-ol, and stigmast-7, 22,25-trien-3 β-ol are isolated from the fruit.[3] Many pharmacological properties have been reported including antioxidant, [4] adipogenesis-reducing, [5] antilipolytic, [6] hypoglycemic, [7] antidiabetic, [8] anticancer, [9] antifertility, [10] antigenotoxic, [11] anthelmintic, [12] antimicrobial, [13] antiviral, [14] and hepatoprotective activity. [15] However, there are no reports to our knowledge on its analgesic and antipyretic activities. Hence, the present study was undertaken to investigate the analgesic and antipyretic potential of the ethanolic and aqueous fruit extract of M. charantia Linn. in experimental animal models.
| Materials and Methods | | |
All the ingredients and chemicals were of analytical grade and purchased from Loba Chemie Pvt. Ltd., Mumbai.
Collection of Plant Materials
A healthy fruit was purchased from a medicinal plant supplier, Hakimm's Brother, Savarkundala (Gujarat) in the month of July 2009. It was identified and authenticated by Dr. A. S. Reddy, taxonomist, Bioscience Department, S. P. University, Vallabh Vidyanagar, Gujarat, India.
Preparation of the Plant Extract
The powdered fruit was extracted with ethanol by the Soxhlet apparatus. The solvent was concentrated by evaporating ethanol using a rotary evaporator. [16] The M. charantia ethanol extract (MC-EE) was further concentrated by allowing it to stand overnight in an oven at 30C.
Phytochemical Tests
The MC-EE was subjected to preliminary, qualitative, phytochemical investigation. [17]
Animals Used
Wistar rats, weighing 200-220 g, and Swiss albino mice, weighing 18-25 g, of either sex were procured from the animal house of the Shree Leuva Patel Trust Pharmacy Mahila College, Amreli, Gujarat, India. All the animals were kept in standard polypropylene cages under standard conditions: temperature (241C), relative humidity (45-55%), and a 12:12 light:dark cycle. The animals were fed a standard rodent diet, and water was given ad libitum. The animals were allowed to acclimatize to laboratory conditions 48 h before the start of the experiment. The experimental protocol is duly approved by the institutional ethical committee (reg. no. 949/a/06/CPCSEA).
Acute Toxicity Study
Six Wistar rats (200-220 g) and six albino mice (18-25 g) of either sex were dosed with MC-EE extracts in different concentrations and were observed for any symptoms of toxicity for 48 h as per guideline no. 425 (OECD 2001), and LD 50 was estimated to be >5000 mg/kg. Based on the results obtained from this study, the doses of further pharmacological studies were fixed to be 250 and 500 mg/kg. [18]
Analgesic Activities
Acetic acid-induced writhing
Mice were divided into four groups each consisting of six mice. They were starved for 18 h. The treatment regimen was as follows:
- Group I (control): Vehicle (3 ml/kg, po.), 1% suspension of Tween-80
- Group II (standard): Aspirin (150 mg/kg, po.)
- Group III (test 1): Ethanolic fruit extract (500 mg/kg, po.)
- Group IV (test 2): Ethanolic fruit extract (250 mg/kg, po.).
After half an hour, all mice received a 0.7% aqueous solution of acetic acid 10 mg/kg, ip., and writhings were counted for 10 min after the acid injection. [19]
Acetic acid-induced writhing test
Tail-immersion method
Mice were divided into four groups each consisting of six mice. The treatment regimen was as follows:
- Group I (control): Vehicle (3 ml/kg, po.), 1% suspension of Tween-80
- Group II (standard): Pentazocine (30 mg/kg, po.)
- Group III (test 1): Ethanolic fruit extract (500 mg/kg, po.)
- Group IV (test 2): Ethanolic fruit extract (250 mg/kg, po.).
The distal part of the tails of the animals was immersed in hot water maintained at 55.0±1.0C. The time taken to withdraw the tail was noted as the reaction time. A cut-off time of 10 s was maintained at 55C to prevent tissue damage. The reaction time was checked at 0, 15, 30, 45 and 60 min, respectively, after treatment. [19]
Antipyretic Activity
Rats were divided into four groups each consisting of six rats. The test was performed in rats by injecting 10 ml/kg sc. of the 15% aqueous solution of Brewer's yeast to induce pyrexia. The rectal temperature of each animal was taken before and 24 h after the yeast injection using a digital clinical thermometer. Animals that did not show a minimum increase of 0.7C in the temperature 24 h after the yeast injection were discarded. The selected animals were divided into four groups and treated as follows:
- Group I (control): Vehicle (3 ml/kg, po.), 1% suspension of Tween-80
- Group II (standard): Paracetamol (20 mg/kg, ip.)
- Group III (test 1): Ethanolic fruit extract (500 mg/kg, po.)
- Group IV (test 2): Ethanolic fruit extract (250 mg/kg, po.).
The rectal temperature of each animal was again recorded at 0.5, 1, 1.5, and 2 h after treatment. [20]
Statistical Analysis
Data were subjected to statistical analysis using ANOVA, and statistical comparison was done using the Tukey-Kramer multiple comparison test. Values of P<0.01 were considered statistically significant.
| Results | | |
Phytochemical Tests
The crude extract was found to be positive for the presence of alkaloids, tannins, glycosides, steroids, proteins, and carbohydrates.
Acute Toxicity Study
After 48 h of the study with different concentrations of the extract, the LD 50 was estimated to be >5000 mg/kg.
Effect on acetic acid writhing
The ethanolic extracts (500 and 250 mg/kg, po.) significantly reduced the acetic acid-induced writhing by 59.99% and 51.22%, respectively [Table 1]. | Table 1 :Effect of ethanolic extracts of the Momordica charantia fruit in acetic acid-induced writhing in mice
Click here to view |
Effect on the tail-immersion test
Ethanolic extracts (500 and 250 mg/kg, po.) induced significant protection [Table 2] in rats in tail-immersion tests, with the ethanolic extracts (500 mg/kg) being more active compared to the standard drug pentazocine (30 mg/kg, po.). | Table 2 :Effect of ethanolic and aqueous extracts of the Plectranthus amboinicus leaf on tail-immersion tests in mice
Click here to view |
Antipyretic Effect
Both the extracts showed a marked antipyretic effect [Table 3] by causing a reduction in yeast-induced fever. The ethanolic extract (500 mg/kg) showed the effect to the same degree as paracetamol (20 mg/kg, ip.). | Table 3 :Effect of ethanolic and aqueous extracts of the Plectranthus amboinicus leaf on yeast-induced pyrexia in rats
Click here to view |
| Discussion | | |
Several experimentally induced laboratory models were employed in evaluating the analgesic and antipyretic activities of ethanolic extracts of M. charantia. It is necessary to apply tests which differ with respect to stimulus quality, intensity, and duration, to obtain as complete a picture as possible of the analgesic properties of a substance using behavioural nociceptive tests. The results obtained showed that the ethanolic extracts possess a significant analgesic effect on the various pain models used. A significant inhibitory effect was shown by both the extracts in the writhing test (a test useful for evaluating mild analgesic, nonsteroidal, anti-inflammatory agents). This suggests that the analgesic effect of the extract may be peripherally mediated. The extracts also showed a significant effect in the tail-immersion tests (centrally acting analgesic drugs elevate the pain threshold of animals toward heat and pressure). The effect of the extracts on this pain model indicates that it might be centrally acting. [20]
The extract caused a better hypothermal activity against yeast-induced pyrexia in rats. The subcutaneous injection of yeast induces pyrexia by increasing the synthesis of prostaglandin and is used to screen agents for an antipyretic effect. [19]
The analgesic and antipyretic activity of M. charantia Linn. may be due to the individual or combined action of bioactive constituents present in it. The findings will be helpful for further phytochemical and pharmacodynamic investigations to find the active constituents responsible for the activity, which may explore some new and promising leads.
| Acknowledgment | | |
The author's grateful to the Principal and Management, Shree Leuva Patel Trust Pharmacy Mahila College, Amreli, for extending laboratory competence and for their material support.
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[Table 1], [Table 2], [Table 3]
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