|RESEARCH ARTICLE |
| || || |
|Year : 2009 | Volume : 41 | Issue : 1 | Page : 23-27 |
Hepatoprotective activity of Eugenia jambolana Lam. in carbon tetrachloride treated rats
SS Sisodia1, M Bhatnagar2
1 Department of Pharmacology, Bhupal Nobles' Girls College of Pharmacy, Udaipur, Rajasthan, India
2 Laboratory of Animal Cell Biotechnology, Department of Biotechnology, University College of Science, M. L. S. University, Udaipur, Rajasthan, India
|Date of Submission ||07-Feb-2008 |
|Date of Decision ||23-Sep-2008 |
|Date of Acceptance ||08-Feb-2009 |
S S Sisodia
Department of Pharmacology, Bhupal Nobles' Girls College of Pharmacy, Udaipur, Rajasthan
Objective: To estimate the hepatoprotective effects of the methanolic seed extract of Eugenia jambolana Lam. (Myrtaceae), in Wistar albino rats treated with carbon tetrachloride (CCl 4 ).
Materials and Methods: Liver damage in rats treated with CCl 4 (1ml/kg/Bw, administered subcutaneously, on alternate days for one week) was studied by assessing parameters such as serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT), alkaline phosphatase (ALP), acid phosphatase (ACP) and bilirubin (total and direct). The effect of co-administration of Eugenia jambolana Lam. (doses 100, 200 and 400 mg/kg p. o.) on the above parameters was investigated. These biochemical observations were supplemented by weight and histological examination of liver sections. Liv.52® was used as positive control. Data were analyzed by one way anova, followed by Scheff's/Dunnett's test.
Results: Administration of Eugenia jambolana Lam. (doses 100, 200 and 400 mg/kg p. o.) significantly prevented carbon tetrachloride induced elevation of serum SGOT, SGPT, ALP, ACP and bilirubin (total and direct) level. Histological examination of the liver section revealed hepatic regeneration, after administration of various doses of Eugenia jambolana Lam. The results were comparable to that of Liv.52®.
Conclusion: The study suggests preventive action of Eugenia jambolana Lam. in carbon tetrachloride induced liver toxicity. Hepatic cell regeneration process was dose dependent.
Keywords: Carbon tetrachloride, Eugenia jambolana Lam., marker enzymes, methanolic extract
|How to cite this article: |
Sisodia S S, Bhatnagar M. Hepatoprotective activity of Eugenia jambolana Lam. in carbon tetrachloride treated rats. Indian J Pharmacol 2009;41:23-7
|How to cite this URL: |
Sisodia S S, Bhatnagar M. Hepatoprotective activity of Eugenia jambolana Lam. in carbon tetrachloride treated rats. Indian J Pharmacol [serial online] 2009 [cited 2014 Mar 6];41:23-7. Available from: http://www.ijp-online.com/text.asp?2009/41/1/23/48888
| » Introduction || || |
The liver, in vertebrate body, performs many vital functions, including metabolic and detoxification activities. A number of chemical agents and routine drugs produce cellular as well as metabolic liver injury. Therefore, many herbal and other indigenous sources have been adequately explored for the safe and effective hepatoprotective action. Eugenia jambolana Lam. (Myrtaceae), popularly known as Jamun , is being widely used to treat liver dysfunctions and diabetes by the traditional practitioners for over many centuries. ,, The bark of this plant is astringent, antihelmenthic, antipyretic, antidysentric and useful in certain urinary disorders, excessive thirst, hemorrhages, ulcer and vaginal discharges.  The juice is helpful in treating inflammation and swelling on the liver and spleen.  The chemical constituents of the seed of Eugenia jambolana Lam. are gallic acid, ellagic acid, corilagin, ellagitannins, isoquercetin, quercetin, caffeic acid, ferulic acid, guaiacol, resorcinaldimethyl ether, lignaglucoside, veratrole, β - sitosterol, palmitic acid etc. ,
In view of the above, the present study was carried out with the aim of evaluating the hepatoprotective properties of the seed extract of Eugenia jambolana Lam., in experimental rat model of liver injury induced by carbon tetrachloride.
| » Materials and Methods || || |
Plant material and chemicals
The seeds of the plant Eugenia jambolana Lam. was collected from a rural area near Udaipur (Rajasthan) city and was purified using the absorption method (by keeping them in contact with brick powder). After purification, the fine powder of the seeds was packed in high quality filter paper and the successive solvent extract (methanol) was prepared by continuous extraction method, with the help of a soxhlet extractor. After vacuo evaporation, the crude extract was suspended in 0.5% carboxy methyl cellulose (CMC) and stored in a refrigerator for further use. Liv.52® (The Himalaya Drug Company, Bangalore, Batch No. 41001CL, Mfg. Date: October 2004, Exp. Date November 2007) syrup was used as positive control. Carbon tetrachloride (Ranbaxy Laboratory Ltd., Batch No. 6FMV0468R) was used to induce hepetotoxicity.
Male albino rats (Wistar strain) weighing 200 - 225g of either sex were used for the present study. The animals were housed in polypropylene cages at controlled temperature (26 ± 2° C), relative humidity (60 ± 5%) and light conditions(12 -12 hours day night cycle). The rats were fed with standard laboratory diet and drinking water was given through a drinking bottle, throughout the experiment. The animals were maintained as per the CPCSEA regulations and the study was approved by the IAEC at Bhupal Nobles' College of Pharmacy, Udaipur (Rajasthan).
Experimental induction of hepatotoxicity
Liver toxicity was induced in rats by administrating carbon tetrachloride (CCl 4 ) subcutaneously (sc), in a suspension of liquid paraffin (LP; 1 : 2 v/v) at a dose of 1 ml/kg body weight, on alternate days, for one week. 
The rats were divided into six groups I - VI, each group consisting of six rats. The rats in group I served as control and received subcutaneous administration of liquid paraffin only 1 ml/kg on alternate days, for one week. Group II rats were given carbon tetrachloride (CCl 4 ) sc, in a suspension of liquid paraffin (1 : 2 v/v), at a dose of 1 ml/kg body weight, on alternate days, for a week. Group III rats were given Liv.52® orally daily and carbon tetrachloride (CCl 4 ), in a suspension of liquid paraffin (1 : 2 v/v), at a dose of 1 ml/kg body weight, on alternate days, for a week, subcutaneously. Group IV - VI were orally administered the extract of Eugenia jambolana Lam. (100, 200 and 400 mg/kg) respectively daily and carbon tetrachloride (CCl 4 ), in a suspension of liquid paraffin (1 : 2 v/v) at a dose of 1 ml/kg body weight, on alternate days, for a week, by the subcutaneous route. The daily food consumption was monitored. The different doses of Eugenia jambolana Lam., LP and CCl 4 were administered to the rats daily, between 8.00 a.m. and10.00 a.m.
On the eighth day, the animals were sacrificed by decapitation. Through an incision made on the jugular vein, blood was collected. The blood and serum were separated by centrifugation and used for estimation of biochemical parameters, that is glutamate oxaloacetate transaminase (GOT),  glutamate pyruvate transaminase (GPT),  alkaline phosphatase (ALP),  acid phosphatase (ACP) and bilirubin (total and direct). 
The results of the biochemical estimations are reported as mean + SD of six animals in each group. The data were subjected to one-way analysis of variance (anova). This was followed by Scheff's/Dunnett's test, to determine the statistical significance of the difference in enzyme activity and other parameters. The level of significance was P <0.05.
The liver tissue was excised from the animals, washed with the normal saline to remove blood, fixed in 10% buffered neutral formalin for 12 hours and processed for paraffin embedding. Sections of 5µm thickness were cut using a rotary microtome. The sections were processed and passed through graded alcohol series, stained with alum haematoxylin and eosin,  cleared in xylene and cover slipped in DPX. Histological examination was done under AO Star microscope.
| » Results || || |
Serum marker enzymes
The levels of marker enzymes, viz. GOT, GPT, ALP, ACP and Bilirubin (total and direct) were significantly increased in group II carbon tetrachloride treated animals, as compared to the control untreated group I. The groups III - VI, treated with Liv.52® and different doses of Eugenia jambolana Lam., followed by carbontetrachloride, showed significant decrease in the level of serum marker enzymes, as compared with the carbon tetrachloride treated group II [Table 1] and [Table 2].
During the histological examination of liver sections of the control group [Figure 1], it was observed that the central vein was prominent, with normal hepatocytes. In the carbon tetrachloride intoxicated group [Figure 2], centriolobular necrosis was observed. In the histological profile of the Liv.52® treated group [Figure 3] and the different groups treated with Eugenia jambolana Lam [Figure 4],[Figure 5],[Figure 6], there was less centriolobular necrosis and hepatocytes showing regeneration activity.
| » Discussion || || |
Carbon tetrachloride, a widely used experimental hepatotoxicant, is biotransformed by cytochrome P - 450 systems to produce the trichloromethyl free radical (CCl 3•) that causes lipid peroxidation and, thereby, produce liver damage. ,, Carbon tetrachloride produces the dose dependent hepatotoxicity by directly affecting the liver, causing lipid peroxidation.  The mechanism of the action of carbon tetrachloride is complex, multifactorial and not completely understood. When administered, carbon tetrachloride accumulates in hepatic parenchymal cells, which is metabolized to free radical CCl 3•. The free radicals react with molecular oxygen to produce peroxy radicals (H 2 O 2 , O 2 and •OH due to incomplete reduction of molecular oxygen), thereby causing oxidative destruction of polyunsaturated fatty acids.  These activated radicals bind covalently to the macromolecules and induce peroxidative degradation of membrane lipids of endoplasmic reticulum, rich in polyunsaturated fatty acids.
Lipid peroxidative degradation of biomembrance is one of the principle causes of hepatotoxicity.  In acute hepatic necrosis, increase in the serum level of glutamate pyruvate transaminase (GPT) is followed by an increase in the level of glutamate dehydrogenase (GDH), which is indicative of liver mitochondrial injury.  This is evidenced by an elevation of the serum marker enzymes GOT, GPT, ALP and ACP in the carbon tetrachloride treated rats. , When liver cell plasma membrane is damaged, a variety of enzymes, normally located in the cytosol, are released into the blood and their estimation is a useful quantitative marker of the extent and type of hepatic cell damage.  In the present investigation, treatment with different dosages of the extract of Eugenia jambolana Lam. (100, 200 and 400 mg/kg p. o.) significantly reversed these elevated marker enzymes, viz. - GOT, GPT, ALP, ACP and bilirubin (total and direct), and the results obtained were comparable with those of the Liv.52® treated group.
A unique feature of the liver tissue is its ability to regenerate. The cell repair mechanisms are influenced by phospholipids coupled with a rise in thymilidate synthetase and thymidine kinase level in the liver, reaching a peak at 72 hours, indicating liver regeneration.  Hepatic cell damage and recovery proceeded simultaneously. However, it is inhibited by repeated dosage of carbontetrachloride. 
In our study, 400mg/kg p. o. dose was highly effective, as compared to other dosages. It is thus concluded that the methanolic extract of Eugenia jambolana Lam., at an oral dose 400mg/kg/day, is effective against the hepatotoxicity caused by carbon tetrachloride. In our study, a comparative histopathological study of the liver from different groups, also shows the hepatoprotective efficacy of Eugenia jambolana Lam.
Further profound studies are required to establish the therapeutic potential and safety of the drugs of herbal origin, in the treatment of hepatotoxicity.
In conclusion, our study demonstrates that the seed extract of Eugenia jambolana Lam. can be effective treatment against liver injury.
| » Acknowledgment || || |
We wish to thank the Department of Science and Technology, Government of Rajasthan, for funding this research work.
| » References || || |
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[Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5], [Figure 6]
[Table 1], [Table 2]
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