| （1.School of Physical Education，South China Normal University，Guangzhou 510006，China；2.School of Physical Education，Linyi University，Linyi 276005，China） Abstract: The authors studied the effects of 6-week load gradually increased exercising on the membrane potential (ΔΨm), BaxmRNA, Bcl-2mRNA and Cytochrome C (Cyt C) of mitochondria in Peyer’s patches, and probed into the changing of such an index as mitochondrial apoptosis pathway in Peyer’s patches. The authors divided 64 8-week old male SD rats randomly into an exercising group and a control group, let the rats in the exercising group do a load gradually in-creased exercise on a treadmill for 6 weeks, measured the levels of Bax and Bcl-2mRNA expression by utilizing the FQ-RT-PCR technology and the average contents of J-aggregate ( ) and J-monomer ( ) of lymphocyte in Peyer’s patches by utilizing JC-1 staining flow cytometry at the end of weeks 0, 2 4 and 6 respectively, calculated ΔΨm ( / ), and measured the concentration of Cyt C by apply the ELISA method. The authors revealed the following findings: 1) during 6-week load gradually increased exercising, the ΔΨms of lymphocytes in Peyer’s patches calculated in weeks 2, 4 and 6 were significantly lower than that calculated in week 0, the ΔΨm calculated in week 4 was the lowest; 2) as compared with those measured in week 0, measured in weeks 4 and 6, the levels of BaxmRNA expression in Peyer’s patches increased significantly, the levels of Bcl-2mRNA expression decreased, and the ratio of Bcl-2 to Bax decreased significantly; 3) as compared with those measured in week 0, the concentrations of Cyt C in Peyer’s patches measured in weeks 2, 4 and 6 increased significantly. The said findings indicated that load gradually increased exercising might affect the apoptosis of lymphocytes in Peyer’s patches by affecting the mitochondrial pathway.
Key words: sports biochemistry；sports immunity；lymphocyte apoptosis；mitochondrion；membrane potential；rats |
