Cell cycle re-entry relates to neuronal apoptosis after exposure to benzo[a]pyrene in SD rats
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摘要
As a widely distributed environmental contaminant,B[a]P could cause neuronal cell apoptosis in animal models.Several studies have indicated that cell cycle re-enter plays a major role in neuronal apoptosis.Currently,a study was undertaken to investigate cell cycle re-entry in neuronal apoptosis after exposing to B[a]P in SD rats.Male SD rats were administrated with B[a]P by intraperitoneal injection at different dose(blank,0,1.0,2.5,6.25 mg/kg bw) for 1,2,and 3 months.Neuronal apoptotic rate of hippocampus was significantly increased in a dose and time dependent manner.To find the relationship between neuronal apoptosis and cell cycle re-entry,the cyclinDl,CDK4,Rb,pRb-ser 807/811,pRb-ser 780 and E2F1 were measured,which are related with cell cycle re-entry.Rb,pRb-ser 807/811,pRb-ser 780 and E2F1 increased in a dose and time dependent manner in hippocampus,The present results suggest that the cell cycle re-enter relates to neuronal apoptosis following exposure to B[a]P in SD rats,implying that B[a]P may be related to neurodegenerative diseases.
As a widely distributed environmental contaminant,B[a]P could cause neuronal cell apoptosis in animal models.Several studies have indicated that cell cycle re-enter plays a major role in neuronal apoptosis.Currently,a study was undertaken to investigate cell cycle re-entry in neuronal apoptosis after exposing to B[a]P in SD rats.Male SD rats were administrated with B[a]P by intraperitoneal injection at different dose(blank,0,1.0,2.5,6.25 mg/kg bw) for 1,2,and 3 months.Neuronal apoptotic rate of hippocampus was significantly increased in a dose and time dependent manner.To find the relationship between neuronal apoptosis and cell cycle re-entry,the cyclinDl,CDK4,Rb,pRb-ser 807/811,pRb-ser 780 and E2F1 were measured,which are related with cell cycle re-entry.Rb,pRb-ser 807/811,pRb-ser 780 and E2F1 increased in a dose and time dependent manner in hippocampus,The present results suggest that the cell cycle re-enter relates to neuronal apoptosis following exposure to B[a]P in SD rats,implying that B[a]P may be related to neurodegenerative diseases.
引文
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