Research about the effect of exercise on the vascular endothelial cells AMPK activated in atherosclerotic rat / 中国应用生理学杂志

<p><b>OBJECTIVE</b>To study the molecular mechanism of exercise to improve cardiovascular health, and exploring the effect of different intensity exercise on AMP activated protein kinase (AMPK) protein expression and phosphorylation of vascular endothelial cells in rat.</p><p><b>METHODS</b>Forty-eight Wistar rats were divided into control group (group C), model group (group AS), low intensity exercise model group (ASL) and high intensity exercise model group (ASH). The serum inflammatory factor concentrations such as IL-6, TNF-alpha, CRP were studied, and the endothelial cell total AMPK and p-AMPK protein were checked by means of Western blot.</p><p><b>RESULTS</b>(1) The level of IL-6 between AS group and control group had no significant difference, the value of ASH group was markedly increased and had significant difference compared with that of the control group or AS group. The serum TNF-alpha levels of AS group and ASL group were significantly higher than those in control group, but the value of ASH and ASL was significantly lower than that in AS group. The serum concentration of CRP after the AS molding was significantly higher than that of the control group, there was no statistical difference between that of ASL and ASH groups. (2) The total AMPK protein content of ASL and ASH groups was significantly higher than that in control group. When compared between the two groups, there was statistical significance. (3) The value of p-AMPK protein of ASL and ASH groups was significantly higher than that of AS group, the value of p-AMPK protein of ASH group was significantly higher than that of the control group at the same time.</p><p><b>CONCLUSION</b>Exercise can reduce the serum levels of inflammatory factors in atherosclerosis rat, and increase AMPK protein expression and phosphorylation level in endothelial cell.</p>

The effects of exercise and glucose and/or acanthopanacis senticosi after workout on AMPK in muscle cell of rat / 中国应用生理学杂志

<p><b>OBJECTIVE</b>To explore the effect of glucose and/or acanthopanacis senticosi administration supplement on AMP-activated protein kinase (AMPK) activation and its change in different phase after exercise in muscle cell of rat.</p><p><b>METHODS</b>128 rats were divided into exercise control groups (C groups), exercise and glucose administration groups (G groups), exercise and acanthopanacis senticosi administration groups (A groups), exercise and glucose and acanthopanacis senticosi administration groups (GA groups). The glucose and acanthopanacis senticosi supplement were completed by intragastric administration in half hour after exercise. All rats were killed in different designed time points before or after glycogen depletion exercise (0 h, 4 h and 12 h respectively) and finally divided into 16 groups (n = 8). The values of AMPK in soleus muscle were analyzed by Western blot.</p><p><b>RESULTS</b>(1) After exercise, the protein content of AMPK quickly increased and reached the peak (209.23 +/- 21.32) then gradually decreased. (2) Acanthopanacis senticosi administration markedly increased the protein content of AMPK in the 0 h and 4 h points after glycogen consumption training (225.11 +/- 20.58 and 186.31 +/- 15.26 vs 195.19 +/- 13.31 and 157.11 +/- 16.43) without any difference after 12 h. (3) Glucose administration had no significant effect on AMPK activation. (4) Both glycogen and acanthopanacis senticosi were supplied simultaneously that had enhanced the AMPK content in 4 h and 12 h point (217.96 +/- 19.25 and 191.86 +/- 14.69). However, the AMPK content in GA group was lower than that in the C groups at 12 h point (121.89 +/- 15.23 vs 137.92 +/- 16.01).</p><p><b>CONCLUSION</b>Exercise could markedly activate the AMPK protein in muscle cell and acanthopanacis senticosi administration augmented such activation. Glucose administration had no significant effect on AMPK activation.</p>