Study on fly maggot peptide on aging model mice and its mechanism
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摘要: 目的:探讨蝇蛆肽对衰老小鼠的作用及其机制。方法:将60只小鼠随机分为6组,除空白组外,其余五组用D-半乳糖致衰老,分为衰老模型组、维生素C组以及蝇蛆肽低、中、高剂量组(2、4、8 g/kg)。测定小鼠的脾脏和胸腺指数。采用羟胺法测定小鼠肝脏和脑及血清中的超氧化物歧化酶(SOD)活力,可见光法测定过氧化氢酶(CAT)和谷胱甘肽过氧化物酶(GSH-Px)的活力,以硫代巴比妥酸(TBA)法测定丙二醛(MDA)的含量。结果:与空白组相比,模型组小鼠脾指数、胸腺指数及肝脏指数均有显著降低(p<0.05),蝇蛆肽低、中、高剂量组脏器指数显著增高(p<0.05)。与空白组比较,模型组肝、脑中SOD、CAT、GSH-Px均降低,且MDA含量增高(p<0.05),血清中SOD、CAT降低、MDA含量增高(p<0.05);与模型组比较,蝇蛆肽低、中、高剂量组肝、脑组织中SOD、CAT、GSH-Px均显著增高、MDA含量显著降低(p<0.05),血清中SOD、CAT显著增高、MDA含量显著降低(p<0.05)。结论:蝇蛆肽通过改变衰老小鼠的脏器指数而对其产生免疫调节作用,可显著提高小鼠肝脏和脑组织中的SOD、CAT、GSH-Px的活力,降低MDA的含量(p<0.05),从而改变机体抗氧化能力。蝇蛆肽对衰老小鼠的影响机制可能与增强其体内抗氧化酶活力及改变脏器指数相关。Abstract: Objective: To study the effect of the fly maggot peptide on the of aging mice and the related mechanism.Methods: 60 mice were randomly divided into six groups.Except the blank group,the other five groups including aging model group,vitamin C group and fly maggot peptides of low,middle and high dose group( 2,4,8 g / kg / d) were induced aging with D- galactose.The spleen and thymus index of mice were measured. The hydroxylamine method was used to determine the superoxide dismutase( SOD) activity in mice's liver,brain and serum. The activity of catalase( CAT) and glutathione peroxidase( GSH- Px) was determined by the visible light method,the content of malondialdehyde( MDA) was determined using thiobarbituric acid( TBA)method.Results: Compared with the blank group,the spleen index,thymus index and liver index of model group were reduced significantly,and the fly maggot peptides of low,middle and high dose group organ index were significantly increased( p < 0.05).Compared with the blank group,the SOD,CAT,GSH- Px in liver,brain of model group were decreased,and MDA was increased( p < 0.05),CAT,SOD in serum were decreased,MDA content was increased( p < 0.05).Compared with the model group,SOD,CAT,GSH- Px in liver and brain tissue of low fly maggot peptides,and the high dose group were significantly increased,MDA content was decreased significantly( p < 0.05).SOD,CAT content in serum were significantly increased,MDA in serum was reduced( p < 0.05). Conclusions: Fly maggot peptides can affect immune function of aging mice by changing the organ index of aging mice,change the antioxidant capacity by increasing the activity of SOD,CAT,GSH- Px in liver and brain tissue and reducing the content of MDA.The influence mechanism of fly maggot peptides on aging mice may be associated with the increasing of the activity of antioxidative enzyme and organ index change.
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Keywords:
- Fly maggot peptide; /
- D-galactose; /
- superoxide dismutase; /
- catalase malondialdehyde; /
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