(1.School of Physical Education,Anhui Normal University,Wuhu 241003,China;2.Key Laboratory of Ado-lescent Health Assessment and Exercise Intervention of Ministry of Education,East China Normal University,Shanghai 200241,China;3.School of Physical Education,Shandong University,Jinan 251016,China) Abstract: In order to probe into the effects of a 12-week medium intensity treadmill exercise on Aβ transfer and re-moval in AD mouse hippocampus, the authors selected 3 months old male Tg APP/PS1 mice, randomly divided them into a transgenic exercise group (TE, n=12) and a transgenic calm group (TC, n=12), selected littermate wild mice as a normal control group (C, n=12) and an exercise control group (E, n=12), let the mice in groups E and TE do a 12-week medium intensity treadmill exercise, bred the mice in groups C and TC in a calm condition, tested the protein relative expression levels of mouse hippocampus LRP-1 and RAGE by means of western blotting, measured the mass concen-trations of mouse hippocampus Aβ40 and Aβ42, blood Aβ40, blood Aβ42, blood sLRP-1 and blood sRAGE by means of ELISA, and revealed the following findings: the mass concentrations of hippocampus Aβ40 (P<0.05) and Aβ42 (P<0.05) of the mice in group TE decreased significantly as compared with those of the mice in group TC; the mass concentrations of blood Aβ40 (P<0.01) and Aβ42 (P<0.01) of the mice in group TE decreased significantly as com-pared with those of the mice in group TC; 2) the protein relative expression level of hippocampus LRP-1 (P<0.01) and the mass concentration of blood sLRP-1 (P<0.05) of the mice in group TE increased significantly as compared with those of the mice in group TC; 3) the protein relative expression level of hippocampus RAGE (P<0.01) and the mass concentration blood sRAGE (P<0.01) of the mice in group TE decreased significantly as compared with those of the mice in group TC. The said findings indicated the followings: By increasing the protein relative expression level of hippocampus LRP-1, the 12-week medium intensity treadmill exercise increased the mass concentration of blood sLPR-1, decreased the protein relative expression level of hippocampus RAGE, decreased the mass concentration of blood sRAGE, and increased the hippocampus Aβ40 and Aβ42 transfer and removal rate of Tg APP/PS1 mice. Key words: sports biochemistry;treadmill exercise;hippocampus Aβ transfer and removal;Alzheimer disease;Aβ;mouse |