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2016 - 201942020 - 20221
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Subject: Veterinary Pharmacology and Toxicology × Start date: 2000 × Thesis Type: M.V.Sc. ×
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    ThesisItemOpen Access
    Evaluation of wound healing properties of Zanthoxylum Oxyphyllum: an indigenous medicinal plant
    (College of Veterinary Science, Assam Agricultural University, Khanapara Campus, 2022-03) Rabha, Kushal; Mohan, Pritam
    The present study was conducted to evaluate the wound healing and analgesic properties of hydro-ethanolic and chloroform extract of Zanthoxylum oxyphyllum in rats and mice. The selected plant was also studied for phytochemical constituents, anti-oxidant properties, and acute oral and dermal toxicity of both the extracts. The dried pulverized fine powder of Zanthoxylum oxyphyllum were extracted using a standard technique where hydro-ethanolic and chloroform extract yield were found to be 14% and 6% respectively. The extracts were found to be positive for Alkaloids, Steroids, Flavonoids, Phenols, Carbohydrates, Diterpenes, Triterpenes and negative for Glycosides, Tannins and Saponins. The extracts did not show any acute oral or dermal toxicity even at the highest oral dose level, i.e., 5000 mg/kg body weight of all the groups. Both the hydro ethanolic and chloroform extract of the selected plants were positive for antioxidant properties, Viz, DPPH and Nitric oxide scavenging activity. The analgesic activity of both the extracts viz hydroethanolic and chloroform extract were evaluated by using Eddy’s hot plate analgesiometer and acetic acid induced writhing test where animals were divided in eight groups with each group having six animals. Group I served as normal control with no treatment and Group II as standard control received oral meloxicam suspension @ 5mg/kg. Other six groups were test groups where hydroethanolic and chloroform extract of Zanthoxylum oxyphyllum were administered in 10, 30 and 100 mg/kg concentrations. In case of Eddy’s hot plate method, both the extracts showed significant increase in latency period after administration of 10, 30, or 100 mg/kg orally to the mouse. The writhing responses were also markedly reduced after administration of 10, 30, and 100 mg/kg hydroethanolic and chloroform extract of Z. oxyphyllum as compared to the control. Both excision and incision wound models were created in rats using xylazine-ketamine anaesthesia and wound contraction percentage and breaking strength of the wound were measured respectively. The test ointments were prepared in 1%, 3% and 10% w/w concentrations for both hydroethanolic and chloroform extract using Vaseline. Rats were randomly divided in groups of nine of six animals in each group for both the wound models. Group I, Group II and group III served as normal (untreated), vehicle (petroleum jelly) and standard (povidone iodine) control groups. Other six groups were treated topically with test ointments of hydro-ethanolic and chloroform extract of Zanthoxylum oxyphyllum. In case of incision wound model, the wound breaking strengths were markedly increased after application of both the extracts when compared to the normal and vehicle control groups. The differences were not statistically significant at 1% level of the standard control, 1%, 3%, and 10% w/w extract groups of Zanthoxylum oxyphyllum. Maximum breaking strength was observed in higher concentrations, i.e., 10% w/w extract of Zanthoxylum oxyphyllum. In case of excision wound model, the wound contraction percentage elevated significantly in standard and extract treated groups as compared to the normal and vehicle control groups. The higher (10%) concentration of extract showed higher wound contraction (%) as compared to the other two extract groups
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    ThesisItemOpen Access
    ROLE OF NANOCURCUMIN ON EXPERIMENTALLY INDUCED HEPATOTOXICITY IN RATS
    (Assam Agricultural University, Khanapara, Guwahati, 2016-07) RAHMAN, FARIDA; Sarma, Jadav
    The present study evaluated the protective effect of nanocurcumin against carbon tetrachloride (CCl4) and paracetamol induced hepatotoxicity. A total of 96 albino rats of Wistar strain were divided into two groups each for CCl4 and paracetamol having eight subgroups consist of six rats per group. In CCl4 induced hepatic model, Group I served as normal control group [olive oil i/p, at the dose rate of 2 ml/kg body weight on the day of administration of CCl4 to the treatment groups and CMC (1% w/v) p.o., 1 ml/100g body weight for 4 weeks], Group II served as positive control (CCl4 2 ml/kg in olive oil by i/p), Group III (CCl4 2 ml/kg in olive oil by i/p + silymarin 100 mg/kg p.o.), Group IV (CCl4 2 ml/kg in olive oil by i/p + nanocurcumin 40 mg/kg p.o), Group V (CCl4 2 ml/kg in olive oil by i/p + nanocurcumin 80 mg/kg p.o.), Group VI (CCl4 2 ml/kg in olive oil by i/p + nanocurcumin 160 mg/kg p.o.), Group VII (CCl4 2 ml/kg in olive oil by i/p + curcumin 160 mg/kg p.o.), Group VIII (CCl4 2 ml/kg in olive oil by i/p + turmeric 160 mg/kg p.o.) for four consecutive weeks. In the paracetamol induced hepatotoxicity model, Group I served as the normal control group (CMC 1 ml/100g body weight), Group II served as positive control (parcetamol 500 mg/kg in CMC p.o.), Group III (parcetamol 500 mg/kg in CMC p.o. + silymarin 100 mg/kg p.o.), Group IV (parcetamol 500 mg/kg in CMC p.o. + nanocurcumin 40 mg/kg p.o.), Group V (parcetamol 500 mg/kg in CMC p.o. + nanocurcumin 80 mg/kg p.o.), Group VI (parcetamol 500 mg/kg in CMC p.o. + nanocurcumin 160 mg/kg p.o.), Group VII (parcetamol 500 mg/kg in CMC p.o. + curcumin 160 mg/kg p.o.), Group VIII (parcetamol 500 mg/kg in CMC p.o. + turmeric 160 mg/kg p.o.) for four consecutive weeks. Blood and liver samples were collected for biochemical and histopathological analysis respectively. The present study revealed that CCl4 and paracetamol elevated the activities of LDH and liver enzymes (AST, ALT, ALP) and increased bilirubin, uric acid and malondialdehyde (MDA) level. On the other hand, CCl4 and paracetamol decreased the biochemical parameters, such as total protein, albumin, and globulin. After treatment with nanocurcumin (40, 80,160 mg/kg body weight) it was found that the activity of liver enzymes (AST, ALT, ALP), LDH, bilirubin, uric acid and MDA level decreased significantly, here as the level of total protein, albumin, and globulin was found to be increased significantly in a dose dependent manner with the nanocurcumin treatment. In the histopathological study it was observed that administration of nanocurcumin decreased the fatty and necro-inflammatory changes of liver.
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    ThesisItemOpen Access
    EVALUATION OF NANOCURCUMIN AND TEA WASTE EXTRACT ON EXPERIMENTALLY INDUCED CAECAL COCCIDIOSIS IN BROILER CHICKS
    (Assam Agricultural University, Khanapara, Guwahati, 2016-07) GOGOI, CHAMPAK; SARMA, J.
    The anticoccidial efficacy of three different doses of nanocurcumin (100 mg/kg bodyweight, 200 mg/kg bodyweight and 300 mg/kg bodyweight), three different doses of tea waste extract (100mg/kg bodyweight, 200mg/kg bodyweight and 300 mg/kg bodyweight) and curcumin (300 mg/kg bodyweight) were tested against Eimeria tenella infection in broilers. A total of 100 numbers of day old Broiler birds (weighing 40-50 g) were procured. All the birds were kept in deep litter system in a small group of 10 birds each. Birds were fed with standard balanced ration and clean drinking water ad libitum and were vaccinated for Ranikhet Disease at 4th day with F-strain vaccine and maintained in a standard laboratory conditions (at ambient temperature ranging between 22-25 0C). Groups 1,3,4,5,6,7,8,9 and 10 were challenged with 10,000 sporulated oocysts of E. tenella at day 10 of age, while group 2 served as the uninfected unmedicated control. Form the day of challenge infection, the birds belonging to group 3 treated with standard drug amprolium and group 4,5,6,7,8,9 and 10 were treated with different doses of nanocurcumin, curcumin and tea waste extract. From 5th day post infection, the birds showed some symptoms of diarrhoea, anorexia and weakness. From 6th day post infection, the birds started to show bloody diarrhoea, anorexia, weakness and death. A total of 22 birds died during the experiment. The negative control group (infected+untreated group) showed highest mortality (100%). The second highest mortality was found in group 7 (infected+treated with tea waste extract 100mg/kg b.w.) i.e. 40%. Other groups showed less moratlity specially the curcumin and nanocucumin treated groups. The positive control group (treated with amprolium) and group 6 (treated with nanocurcumin 300 mg/kg b.w.) showed no mortality. It was seen that Group 2 (Normal control) showed highest body weight (2260±52.64). Subsequently, Group 3 (treated with amprolium) showed a bodyweight (2175.00 ± 49.75) which has no significant difference with Group 2. Group 6 (treated with nanocurcumin300 mg) showed the highest bodyweight among the experimental groups (2015.00 ± 43.02). However, Groups treated with tea waste extract showed a significant drop in weight gain (1197.00 ± 95.37, 1106.00 ± 30.46, 1347.00 ± 30.84). Group 2 (normal control) showed highest FCR (1.64). Blood parameters were recorded and analysed and found significant difference between the groups (p<0.001). It was concluded that the effect of nanocurcumin was significantly better than tea waste extract and can be compared with the standard drug i.e. Amprolium.
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    ThesisItemOpen Access
    TOXIC POTENTIAL OF PROFENOFOS IN BROILER CHICKEN
    (Assam Agricultural University, Khanapara, Guwahati, 2016-07) KAFLE, ARJUN; Roy, D. C.
    The present investigation was undertaken to study the acute and subchronic toxicity of Profenofos in broiler chicken. A total of 30 numbers of broiler chickens were included in the experiment which were divided into 3 groups (Group A, B and C), each comprising 10 chickens. Group A birds served as acute toxicity group and were administered a single LD50 dose of Profenofos i.e., 16 mg/kg body weight orally while group B served as subchronic toxicity group and were administered dose of 1.6 mg/kg body eight orally daily for a period of 60 days. Group C served as control. For acute toxicity study, blood was collected at 0, 3, 6, 12, 24 and 36 hours whereas blood was collected at weekly interval for subchronic toxicity study. In case of acute toxicity group, within 3 hours of Profenofos administration birds exhibited clinical signs which included depression, anorexia, diarrhea, gasping, excessive salivation, drooling, curved position and rigid stance with drooping of wings. Progressively the birds were unable to stand and sat on their hocks with curled toes followed by tremor, incordination, convulsions and death. However the signs observed in Group B were less pronounced except the birds exhibited sitting on hock posture, staggering gait, leg weakness, limb paresis and diarrhea were noticed in the latter part of the experiment. Curled toes were seen in some of the birds. The haematological parameters (Haemoglobin, Total Erythrocyte Count, Total Leucocyte Count and Heterophil) were significantly increased in both the treated groups compared to the control. However the level of lymphocyte was found to be decreased in both acute and subchronic toxicity group compared to the control group. Significant increase in serum enzyme activities (Alanine Amino Transferase, Aspartate Amino Transferase, Alkaline Phosphatase, Total Cholesterol and Uric acid) were observed in both the treated groups. However the level of Serum Cholinesterase was found to be significantly reduced in treated groups as compared to the control. On postmortem, gross changes on liver, kidney, lung, and brain were recorded and mostly included congestion, haemorrhage in lung, kidney and brain while distention of gall bladder was observed in the liver in both the groups. Histopathological study of liver showed congestion and infiltration of inflammatory cells, kidney revealed coagulative necrosis, hydropic degeneration and distention of the tubules. Mild congestion and haemorrhage were observed in the lung while the brain revealed congestion, neuronophagia and satellosis. The level of residue was assessed by Ultra High Performance Liquid Chromatography technique in which the level of Profenofos was found to be maximum in brain in acute toxicity study while in subchronic toxicity, the liver was detected with the maximum residue. The level of residue was found to be least in muscle in both acute and subchronic toxicity studies. In acute toxicity study the concentration of Profenofos in brain showed MRL level (0.05μg/g) while in subchronic toxicity study the concentration detected were below the MRL in all the samples tested.
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    ThesisItemOpen Access
    EVALUATION OF HEPATOPROTECTIVE AND HYPERLIPIDEMIC PROPERTIES OF ALTERNANTHERA SESSILIS
    (Assam Agricultural University, Khanapara, Guwahati, 2016-07) Borthakur, Anurag; Mohan, P.
    The aqueous and methanolic extracts of Alternanthera sessilis were evaluated for hepatoprotective, hypolipidemic activities in rats. The effects of the extracts were also observed in guinea pig ileum and rat ileum. The Botanical Survey of India, Shillong had identified and authenticated the plant as Alternanthera sessilis (A. sessilis). The dried and pulverized fine powder of A. sessilis leaves which was subjected to cold aqueous and cold methanolic extract treatment yielded 11.45 and 5.98 grams per 100 grams of dry powder, respectively. The extracts of A. sessilis were found to be positive for phlobatannin, saponin, terpenoids, steroids, flavonoids when subjected to qualitative phytochemical analysis. The calculated LD50 was found to be greater than 2500 mg.kg -1 body weight as per OECD guidelines. For evaluation of hepatoprotective activity of A. sessilis in rats, hepatotoxicty was induced by carbon tetrachloride (CCl4 + Liquid Paraffin 50% v/v) 2ml/kg body weight subcutaneously twice a week for 3 weeks in all the groups except group I (control). Group I served as normal control, whereas group II as treated control with only CCl4, Group III as standard and group IV, V and VI were treated with varying doses of aqueous extract at 100, 300 and, 900 mg.kg -1 body weight respectively. Similarly in another experiment, group IV, V and VI were treated with varying doses of methanolic extract at 100, 300 and 900 mg.kg-1 respectively. The treatment for group I (control), Group II (treated control) and group III (silymarin treated) was done exactly the same way as in the previous setting. The parameters studied were aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatise, total bilirubin. The effects of both aqueous and methanolic extracts of A. sessilis in CCl4 induced hepatic damage , in a dose dependent manner was found to lower, the cellular enzymes, viz. Aspartate aminotransferase (AST), alanine aminotransferase (ALT) and serum alkaline phosphatise(ALP). The efficacy in lowering the various cellular enzymes leaking into the serum after hepatic damage was not significantly different between the methanolic and the aqueous extract. The hepatoprotective activity of extracts of A. sessilis, as depicted by reduction in the plasma level of some cellular enzymes viz. AST, ALT, and ALP, including drop in total bilirubin level, may be due to its free radical scavenging activity of certain plant constituents like flavonoids, terpenoids etc. For evaluation of hypolipidemic activity of A. sessilis in rats, the animals were placed in six different groups with each group consisting of 6 rats. The group I was kept as control with normal feeding and ad libitum water. The group II was kept as treated control with high fed diet (20% coconut oil in feed) being fed to induce hypercholesterolemia. The group III was treated with atorvastatin @ 10 mg.kg-1 body weight. The group IV, V and VI were treated with varying doses of aqueous extact @ 100 mg.kg-1. 300 mg.kg-1, 900mg.kg-1 body weight respectively. The hypolipidemic effect in the groups treated with the aqueous extract was discernable from the 2nd weeks onwards with the highest dose of A. sessilis showing comparable effect with the group subjected to atorvastatin treatment. The possible mechanism via which it produces its hypolipidemic effect may be due to increased functioning of the hepatocytes thereby facilitating the excretion of cholesterol through bile. The extracts of A. sessilis did not produce any effect when subjected to guinea pig ileum neither could it block the histaminic effect when treated in the presence of extract. The extracts also did not show any effect when it was subjected to rat ileum. Neither could it block the effect of acetylcholine when treated in presence of the extracts.