In the present, investigation effects of sub-lethal dose of purified paper wasp Ropalidia marginata venom toxins were evaluated on important metabolic enzymes i.e. ALP ACP, GPT, GOT, LDH, and AchE enzyme activity in s...In the present, investigation effects of sub-lethal dose of purified paper wasp Ropalidia marginata venom toxins were evaluated on important metabolic enzymes i.e. ALP ACP, GPT, GOT, LDH, and AchE enzyme activity in serum, liver, and gastrocnemius muscles of albino mice. Alkaline phosphatase was found to be increased up to 119.9% at the 6<sup>th</sup> hr of the toxin injection in comparison to control. This elevation may be due to cytolysis. Maximum increase i.e., 153.33% level of glutamate pyruvate transaminase (GPT) was found at 6 hrs of 40% of 24-h LD<sub>50</sub> treatment while it was found to be 151.1% at 6 hrs of 24 hr 80% of LD<sub>50</sub>, venom injection. A significant elevation was observed in LDH activity in serum, liver, and muscles, while the activity of AchE was decreased in serum, liver, and gastrocnemius muscles of albino mice after injecting the sub-lethal dose of Ropalidia marginata venom. This increase in the activity of LDH produces liver damage, massive disintegration and necrosis of hepatic cells. This elevation in LDH level led to a significant increase in the glucose catabolism and elevated oxidative stress in muscle and liver cells. It also displays insufficient oxygen supply and consequently leads to cell death. In experimental animals, venom toxin treatment decreased AchE level, and animals showed muscular paralysis. When mice were treated with 40% and 80% of 24-h LD<sub>50</sub> of purified venom caused a significant (p < 0.05) elevation in the level of ACP, GOT, GPT, and LDH while the reduction in ALP and AChE level. Present study will be useful in the development of prototypes for study of pharmacological and therapeutic effects of various venom toxins. For this purpose structure activity relationship of enzyme and venom toxin, its due interaction to various metabolic enzymes and receptors must be explored.展开更多
In the present investigation, in vivo effects of purified ticks’ saliva toxin were evaluated on the level of certain important cellular metabolic enzymes i.e. acid phosphatase (ACP), alkaline phosphatase (ALP), gluta...In the present investigation, in vivo effects of purified ticks’ saliva toxin were evaluated on the level of certain important cellular metabolic enzymes i.e. acid phosphatase (ACP), alkaline phosphatase (ALP), glutamate pyruvate transaminase, glutamate oxaloacetate transaminase and lactic dehydrogenase. For this purpose, sub-lethal doses, 40% and 80% of 24 h LD50 purified saliva toxins of Rhipicephalus microplus (Canestrini, 1888) were injected subcutaneously in the albino mice. In treated mice saliva toxins targeted membrane-bound enzymes i.e. serum acid phosphatase and alkaline phosphatase, its level was increased from 118.30% to 163.63% at the 6th hr in comparison to the control. Besides this, the levels of serum glutamate pyruvate transaminase (GPT) and glutamate oxaloacetate transaminase (GOT) and lactic dehydrogenase (LDH) also increased up to 161.11% (at 6th hr), 148.27 (at 8th hr) and 125.45% (at 6th hr) respectively in comparison to control. An increase in the level of LDH showed insufficient oxygen supply, massive disintegration of cells and leakage of the enzyme into the circulation. It clearly indicated the toxic effects of saliva toxins on the membrane of blood cells, hepatocytes and myocardial muscle cell functions in albino mice. On the other hand activity of acetyl cholinesterase was reduced by 65.51% at the 6th hr of the saliva toxin injection in comparison to the control. This inhibition of acetyl cholinesterase activity caused the accumulation of acetylcholine molecules at the synaptic junctions and led to prolonged activation of acetylcholine receptors. It caused permanent stimulation of nerves and muscle cells that may result in muscular paralysis and finally death of the animal.展开更多
选取初始体重为(9.46±0.01)g的大菱鲆(Scophthalmus maximus L.)为研究对象,以30%鱼粉组为对照,分别添加5%磷虾水解物(LKH)和10%磷虾水解物(HKH)以替代鱼粉蛋白,配制3组等氮等脂的饲料,在室内流水养殖系统进行为期10周的养殖实验,...选取初始体重为(9.46±0.01)g的大菱鲆(Scophthalmus maximus L.)为研究对象,以30%鱼粉组为对照,分别添加5%磷虾水解物(LKH)和10%磷虾水解物(HKH)以替代鱼粉蛋白,配制3组等氮等脂的饲料,在室内流水养殖系统进行为期10周的养殖实验,旨在探究饲料中添加磷虾水解物对大菱鲆幼鱼生长性能、体组成及相关酶活性的影响。结果显示,HKH组大菱鲆幼鱼的特定生长率(SGR)、饲料效率(FE)、蛋白质效率比(PER)、蛋白质沉积率(PPV)均显著高于对照组(P<0.05),但摄食率(FI)显著低于对照组(P<0.05);LKH、HKH组大菱鲆幼鱼肌肉总氨基酸含量和必需氨基酸含量显著高于对照组(P<0.05);LKH、HKH组肝脏谷草转氨酶(GOT)活性显著高于对照组(P<0.05),而血清GOT活性与对照组无显著性差异(P>0.05);HKH组肝脏谷丙转氨酶(GPT)活性显著高于对照组和LKH组(P<0.05),但血清GPT活性显著低于LKH组和对照组(P<0.05);HKH组肠道淀粉酶活性显著高于对照组(P<0.05),同时随着磷虾水解物添加量的升高,肠道及幽门盲囊胰蛋白酶活性先降低后升高,且在HKH组显著高于对照组(P<0.05)。综上结果表明,在饲料中添加10%磷虾水解物能够提高大菱鲆幼鱼的生长性能,促进其氨基酸代谢和消化吸收。展开更多
文摘In the present, investigation effects of sub-lethal dose of purified paper wasp Ropalidia marginata venom toxins were evaluated on important metabolic enzymes i.e. ALP ACP, GPT, GOT, LDH, and AchE enzyme activity in serum, liver, and gastrocnemius muscles of albino mice. Alkaline phosphatase was found to be increased up to 119.9% at the 6<sup>th</sup> hr of the toxin injection in comparison to control. This elevation may be due to cytolysis. Maximum increase i.e., 153.33% level of glutamate pyruvate transaminase (GPT) was found at 6 hrs of 40% of 24-h LD<sub>50</sub> treatment while it was found to be 151.1% at 6 hrs of 24 hr 80% of LD<sub>50</sub>, venom injection. A significant elevation was observed in LDH activity in serum, liver, and muscles, while the activity of AchE was decreased in serum, liver, and gastrocnemius muscles of albino mice after injecting the sub-lethal dose of Ropalidia marginata venom. This increase in the activity of LDH produces liver damage, massive disintegration and necrosis of hepatic cells. This elevation in LDH level led to a significant increase in the glucose catabolism and elevated oxidative stress in muscle and liver cells. It also displays insufficient oxygen supply and consequently leads to cell death. In experimental animals, venom toxin treatment decreased AchE level, and animals showed muscular paralysis. When mice were treated with 40% and 80% of 24-h LD<sub>50</sub> of purified venom caused a significant (p < 0.05) elevation in the level of ACP, GOT, GPT, and LDH while the reduction in ALP and AChE level. Present study will be useful in the development of prototypes for study of pharmacological and therapeutic effects of various venom toxins. For this purpose structure activity relationship of enzyme and venom toxin, its due interaction to various metabolic enzymes and receptors must be explored.
文摘In the present investigation, in vivo effects of purified ticks’ saliva toxin were evaluated on the level of certain important cellular metabolic enzymes i.e. acid phosphatase (ACP), alkaline phosphatase (ALP), glutamate pyruvate transaminase, glutamate oxaloacetate transaminase and lactic dehydrogenase. For this purpose, sub-lethal doses, 40% and 80% of 24 h LD50 purified saliva toxins of Rhipicephalus microplus (Canestrini, 1888) were injected subcutaneously in the albino mice. In treated mice saliva toxins targeted membrane-bound enzymes i.e. serum acid phosphatase and alkaline phosphatase, its level was increased from 118.30% to 163.63% at the 6th hr in comparison to the control. Besides this, the levels of serum glutamate pyruvate transaminase (GPT) and glutamate oxaloacetate transaminase (GOT) and lactic dehydrogenase (LDH) also increased up to 161.11% (at 6th hr), 148.27 (at 8th hr) and 125.45% (at 6th hr) respectively in comparison to control. An increase in the level of LDH showed insufficient oxygen supply, massive disintegration of cells and leakage of the enzyme into the circulation. It clearly indicated the toxic effects of saliva toxins on the membrane of blood cells, hepatocytes and myocardial muscle cell functions in albino mice. On the other hand activity of acetyl cholinesterase was reduced by 65.51% at the 6th hr of the saliva toxin injection in comparison to the control. This inhibition of acetyl cholinesterase activity caused the accumulation of acetylcholine molecules at the synaptic junctions and led to prolonged activation of acetylcholine receptors. It caused permanent stimulation of nerves and muscle cells that may result in muscular paralysis and finally death of the animal.
文摘选取初始体重为(9.46±0.01)g的大菱鲆(Scophthalmus maximus L.)为研究对象,以30%鱼粉组为对照,分别添加5%磷虾水解物(LKH)和10%磷虾水解物(HKH)以替代鱼粉蛋白,配制3组等氮等脂的饲料,在室内流水养殖系统进行为期10周的养殖实验,旨在探究饲料中添加磷虾水解物对大菱鲆幼鱼生长性能、体组成及相关酶活性的影响。结果显示,HKH组大菱鲆幼鱼的特定生长率(SGR)、饲料效率(FE)、蛋白质效率比(PER)、蛋白质沉积率(PPV)均显著高于对照组(P<0.05),但摄食率(FI)显著低于对照组(P<0.05);LKH、HKH组大菱鲆幼鱼肌肉总氨基酸含量和必需氨基酸含量显著高于对照组(P<0.05);LKH、HKH组肝脏谷草转氨酶(GOT)活性显著高于对照组(P<0.05),而血清GOT活性与对照组无显著性差异(P>0.05);HKH组肝脏谷丙转氨酶(GPT)活性显著高于对照组和LKH组(P<0.05),但血清GPT活性显著低于LKH组和对照组(P<0.05);HKH组肠道淀粉酶活性显著高于对照组(P<0.05),同时随着磷虾水解物添加量的升高,肠道及幽门盲囊胰蛋白酶活性先降低后升高,且在HKH组显著高于对照组(P<0.05)。综上结果表明,在饲料中添加10%磷虾水解物能够提高大菱鲆幼鱼的生长性能,促进其氨基酸代谢和消化吸收。
