Differential TNF production by monocyte subsets under physical stress: blunted mobilization of proinflammatory monocytes in prehypertensive individuals.
Differential TNF production by monocyte subsets under physical stress: blunted mobilization of proinflammatory monocytes in prehypertensive individuals.
复制标题
单核细胞亚群在身体压力下产生差异TNF：在型前期个体中动员促炎单核细胞的动员钝化。
DOI：
10.1016/j.bbi.2012.10.003
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发表时间：
2013-01
影响因子：
15.1
通讯作者：
Hong, Suzi
中科院分区：
文献类型：
--
作者：
Dimitrov, Stoyan;Shaikh, Farah;Pruitt, Christopher;Green, Michael;Wilson, Kathleen;Beg, Nuzhat;Hong, Suzi
关键词：
Elevated blood pressure (BP) and infiltration of the vasculature by monocytes contribute to vascular pathology; but, monocyte migratory characteristics based on differing inflammatory potential under adrenergic activation remains unclear. We compared nonclassical (CD14+CD16++; HLA-DR+), intermediate (CD14++CD16+; HLA-DR++), and classical (CD14++CD16−; HLA-DR+/−) monocyte trafficking and their LPS-stimulated TNF production in response to a physical stressor (20-min treadmill exercise at 65-70% VO2peak) in participants with high prehypertension (PHT), mild PHT or normal BP (NBP). To determine adrenergic receptor (AR) sensitivity, pre-exercise cells were also treated with isoproterenol (Iso). When cells were stimulated with LPS, the CD16 molecules were downregulated, and monocytes subsets were differentiated based on HLA-DR expression. Monocyte subpopulations (as % of total monocytes) and intracellular TNF production were evaluated by flow cytometry. TNF production in all subsets decreased post-exercise and with ex-vivo incubation with Iso, irrespective of BP (p < .001), with nonclassical and intermediate monocytes being a major source of TNF production. Overall, % nonclassical monocytes increased, % intermediate did not change, whereas % classical decreased post-exercise (p < .001). However, % increase in nonclassical monocytes under exercise-induced adrenergic activation was blunted in high PHT individuals (p < .05), but not in individuals with mild PHT and NBP. These findings extend our previous reports by showing that the mobilization of proinflammatory monocytes under physical stress is attenuated with even mild BP elevation. This may be indicative of monocytic AR desensitization and/or greater adhesion of “proinflammatory” monocytes to the vascular endothelium in hypertension with potential clinical implications of vascular pathology.
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影响因子：
20.3
作者：
Wong, Kok Loon;Tai, June Jing-Yi;Wong, Siew-Cheng
通讯作者：
Wong, Siew-Cheng
影响因子：
37.8
作者：
Lloyd-Jones, DM;Larson, MG;Levy, D
通讯作者：
Levy, D
影响因子：
16.8
作者：
Ingersoll MA;Platt AM;Potteaux S;Randolph GJ
通讯作者：
Randolph GJ
影响因子：
20.3
作者：
Zawada, Adam M.;Rogacev, Kyrill S.;Heine, Gunnar H.
通讯作者：
Heine, Gunnar H.
影响因子：
37.8
作者：
Kiechl, S;Egger, G;Willeit, J
通讯作者：
Willeit, J