期刊
JOURNAL OF APPLIED PHYSIOLOGY
卷 95, 期 5, 页码 1833-1842出版社
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/japplphysiol.00359.2003
关键词
lipopolysaccharide; aging; exercise training; inflammatory cytokines
The purpose of this study was to examine the influence of resistive exercise training and hormone status on mRNA expression of toll-like receptor 4 (TLR4), CD14, IL-1beta, IL-6, and TNF-alpha. Resistive exercise-trained women on traditional hormone replacements [hormone replacement therapy (HRT), n = 9], not taking hormones (NHR, n = 6), or taking medications known to influence bone (MIB, n = 7) were compared with untrained subjects not taking supplemental hormones (Con, n = 6). Blood was taken from trained subjects before, immediately after, and 2 h after resistive exercise (same time points for resting Con). TLR4 mRNA expression (RT-PCR) was not different among groups or across time but was significantly (P = 0.044) lower (1.9-fold) when trained groups were collapsed and compared with Con. There was also a significant group effect (P < 0.0001) for TLR4 mRNA when expressed per monocyte. CD14 expression was significantly (P = 0.006) lower (2.3-fold) for training groups collapsed and compared with Con. CD14 mRNA, expressed per monocyte, was significantly lower immediately after resistive exercise for NHR, HRT, and MIB compared with Con. There were few significant effects detected for IL-6, IL-1 beta, and TNF-alpha mRNA, but there was a significant group effect (P < 0.0001) for TNF-alpha mRNA expressed per monocyte (Con > HRT, NHR, MIB). These findings suggest that there may be a resistive exercise training-induced reduction in TLR4/CD14 expression in older women. Further research is needed to determine whether lower TLR4/CD14 could explain the lower LPS-stimulated inflammatory cytokines observed in these women.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据