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Subject: Veterinary Pharmacology and Toxicology × End date: 2004 × Start date: 2004 × Type: Thesis ×
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    ThesisItemOpen Access
    Comparative study of the hypoglycemic effect of Azadirachta indica (Neem),Ocimum sanctum Tulsi) and Tinospora cordifolia (Chittamruthu) and their combination in diabetic rats
    (Department of Pharmacology and Toxicology, College of Veterinary and Animal Sciences, Mannuthy, 2004) Archana Sathyan; KAU; Chandrasekharan Nair, A M
    The present study was undertaken to assess and compare the hypoglycemic effects of alcoholic extracts of Azadirachta indica and Ocimum sanctum leaves and Tinospora cordifolia vines and their combination at 200 mg/kg dose rate in alloxan diabetic rats and to compare their efficacy with standard oral hypoglycemic drug, glibenclamide. The experiment was conducted in forty eight alloxan induced diabetic rats of either sexes for a period of 37 days. Rats were divided into six groups of eight each. Group I was administered alcoholic extract of Azadirachta indica at 200mg/kg for 30 days from 7th day onwards, Group II received Ocimum sanctum alcoholic extract at the same dose rate and Group III was given Tinospora extract at 200 mg/kg. A combination of alcoholic extracts of Azadirachta, Ocimum and Tinospora was fed to Group IV at 200 mg/kg body weight. Group V received glibenclamide at 0.5 mg/animal/day for 30 days and Group VI served as diabetic control. Blood glucose level was estimated on zero day, 7th, 15th, 21st, 30th and 37th day. Body weight was taken at weekly intervals. Serum cholesterol, serum triglyceride and liver glycogen were estimated at 37th day of the experiment. All the treatment groups (I, II, III and IV) showed a gradual increase in body weight during the experimental period, but it was seen that the body weights never returned to their original weights before the commencement of the experiment. Among the treatment Groups I, II and III, Group I given Azadirachta extract had the maximum decrease in blood glucose level. Group IV which received a combination of the three drugs had a higher reduction compared to Group I, II and III. Results suggested a synergistic effect of the combination. However, the effect was comparatively lower than that of glibenclamide. Significant reduction in serum cholesterol level was seen in Group I, II and III. Highest cholesterol level was seen in Group II and the lowest serum cholesterol level was seen in Group IV. Serum triglyceride level was highest in Group II and III. Group I had a comparatively lower serum triglyceride level. Lowest triglyceride level was shown by Group IV treated with combination. Treatment with all the three drugs resulted in no significant change in the liver glycogen levels. Combination treatment also failed to produce any significant alteration in the reduced liver glycogen levels. Group I, II and III had a liver glycogen levels comparable to that of the control Group VI. From the study, it can be concluded that among the three drugs, Azadirachta has the highest hypoglycemic and hypolipidemic effect. The combination treatment produced a comparatively higher effect than that of the three drugs, suggesting a synergistic action. However, the effects of the three drugs and their combination are less when compared to that of glibenclamide and the mechanism of action of the three plants are different from that of glibenclamide.
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    ThesisItemOpen Access
    Comparative study of anti-inflammatory and anti-nociceptive effect of Tinospora cordifolia (Chittamruthu)and Vitex negundo Linn.(Karinochi)in rats
    (Department of Pharmacology and Toxicology, College of Veterinary and Animal Sciences, Mannuthy, 2004) Jerald Irwin, A; KAU; Gopakumar, N
    Anti-inflammatory and anti-nociceptive effect of T. cordifolia, V. negundo and the combination of two herbal agents were assessed and compared in rats. Carrageenin induced rat paw oedema and tail flick method of nociception were adopted for anti-inflammatory and anti-nociceptive screening respectively. Diclofenac potassium at the rate of 3 mg/kg was used as a standard drug for both the studies. Anti-inflammatory effect of T. cordifolia at the rate of 100 mg/kg, V. negundo at the rate of 100 mg/kg and the combination of these agents at 50 mg/kg of each were studied in rats. Test drugs at the rate of 1000 mg/kg for both T. cordifolia and V. negundo and 500 mg of each agent in combination were given for anti-nociceptive study in rats. Anti-inflammatory effect of T. cordifolia was found effective in first phase and V. negundo in the second phase of carrageenin induced inflammation. The combination of the herbal agents produced a uniform significant inhibition in both the phases. Anti-nociceptive effect was found significant for both the herbal agents and their combination, in tail flick method of nociception. This suggested a central mediated mechanism of anti-nociception by both the agents. Adrenal parameters like gland weight, ascorbic acid and cholesterol for anti-inflammatory study suggested that T. cordifolia and V. negundo had a preventive effect on the inflammation induced changes in adrenal gland. However combination of the herbal agents was found to decrease the preventive action of the individual agents against inflammation induced changes in adrenal gland. The involvement of endogenous modulatory system for the anti-nociceptive effect of T. cordifolia and V. negundo was in contrary because of the anonymous increase of adrenal ascorbic acid and decrease of adrenal cholesterol. T. cordifolia was found effective in lowering the serum cholesterol whereas combination was not that much effective. None of the treatments were found to inhibit the lipid peroxidation induced by inflammation in plasma. Combination of T. cordifolia and V. negundo showed a significant peak increase of plasma lipid peroxide level. The rise in serum level of AST and ALT in both inflammation and nociception were not inhibited by the treatments. Haematological parameters for all groups were within the normal range. However an increase in neutrophil count than lymphocyte was noticed in carrageenin induced inflammation. Both the studies showed an increase in neutrophil count without an increase in total leukocyte count for T. cordifolia. V. negundo showed an increase in total leukocyte count in anti-inflammatory study. A decrease in total leukocyte count and neutrophil count was made by the combination of T. cordifolia and V. negundo in anti-inflammatory study. However there was an increase of total leukocyte count for combination of agents in anti-nociceptive study. Total erythrocyte count and haemoglobin concentration were increased by T. cordifolia in both the studies, whereas they were normal for combination of treatment.
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    ThesisItemOpen Access
    Influence of Piper longum (Linn) on the anti-inflamatory and anti-nociceptive effect of diclofenac in rats
    (Department of Pharmacology and Toxicology, College of Veterinary and Animal Sciences, Mannuthy, 2004) Seema, S; KAU; Joy, A D
    The present study was undertaken to assess the influence of P. longum on the anti-inflammatory and anti-nociceptive effects of diclofenac in rats. The experiment was conducted in two stages. In the first stage the anti-inflammatory effect was assessed by carrageenin induced paw oedema method. Four groups of eight albino rats each were used for the study. First group was kept as control which received tween 80 only. Group II served as the positive control which received diclofenac at the dose of 3 mg/kg on the seventh day. Groups III and IV were given 100 mg/kg and 200 mg/kg P. longum extract respectively for seven days, and 3 mg/kg diclofenac on the seventh day. The percentage inhibition of paw oedema was 64.26 and 62.32 for groups III and IV, while it was 67.38 for the diclofenac treated group II. No significant change was noticed in the weight of adrenal gland in groups II, III and IV as compared with that of control. The adrenal ascorbic acid and adrenal cholesterol levels were reduced in all the treatment groups (Group II, III and IV), compared with the control group (Group I). The maximum reduction was observed in the diclofenac alone treated group. In the groups treated with P. longum extract and diclofenac, the reduction in the level of adrenal ascorbic acid and adrenal cholesterol was more for the 100 mg/kg P. longum treated group. The serum AST levels were significantly higher in Group II compared with the control group. The serum ALT and cholesterol levels showed no significant variation between groups. Variation in the haematological parameters between groups was not significant. For evaluating the influence of P. longum extract on the anti-nociceptive effect of diclofenac, four groups of eight rats each were used.The results of the anti-nociceptive study also revealed a reduction in the anti-nociceptive activity of diclofenac in the groups treated with P. longum extract and diclofenac combinations compared with the diclofenac alone treated group. The change in weight of the adrenals was not significant in the groups II, III and IV compared with that of the control. The adrenal ascorbic acid and adrenal cholesterol levels were found to be depleted in all the three treatment groups (Group II, III and IV) compared with the control group (group I). The depletion was maximum in the diclofenac treated group. In the groups treated with P. longum extract and diclofenac, the reduction in the level of adrenal ascorbic acid and adrenal cholesterol was more for the 100 mg/kg P. longum treated group. Variations in serum parameters like AST and cholesterol were not significant between groups. The serum ALT levels for groups given diclofenac alone and those given the P. longum extract and diclofenac combinations were significantly increased compared with that of the control group. The ALT level was maximum in the diclofenac treated group. The haematological parameters showed no significant variation between the groups. Phytochemical study on the alcoholic extract of P. longum revealed the presence of alkaloids. The results of the study indicate that the rats given diclofenac alone showed a greater anti-inflammatory and anti-nociceptive effect than those administered P. longum extract in combination with diclofenac. This may be due to the microsomal enzyme induction which enhances the metabolism of diclofenac. Thus the experimental findings indicate that co-administration of P. longum extract decreases the anti-inflammatory and anti-noceptive effect of diclofenac