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Effects of 60-day bed rest with and without exercise on cellular and humoral immunological parameters.

Abstract：

:Exercise at regular intervals is assumed to have a positive effect on immune functions. Conversely, after spaceflight and under simulated weightlessness (e.g., bed rest), immune functions can be suppressed. We aimed to assess the effects of simulated weightlessness (Second Berlin BedRest Study; BBR2-2) on immunological parameters and to investigate the effect of exercise (resistive exercise with and without vibration) on these changes. Twenty-four physically and mentally healthy male volunteers (20-45 years) performed resistive vibration exercise (n=7), resistance exercise without vibration (n=8) or no exercise (n=9) within 60 days of bed rest. Blood samples were taken 2 days before bed rest, on days 19 and 60 of bed rest. Composition of immune cells was analyzed by flow cytometry. Cytokines and neuroendocrine parameters were analyzed by Luminex technology and ELISA/RIA in plasma. General changes over time were identified by paired t-test, and exercise-dependent effects by pairwise repeated measurements (analysis of variance (ANOVA)). With all subjects pooled, the number of granulocytes, natural killer T cells, hematopoietic stem cells and CD45RA and CD25 co-expressing T cells increased and the number of monocytes decreased significantly during the study; the concentration of eotaxin decreased significantly. Different impacts of exercise were seen for lymphocytes, B cells, especially the IgD(+) subpopulation of B cells and the concentrations of IP-10, RANTES and DHEA-S. We conclude that prolonged bed rest significantly impacts immune cell populations and cytokine concentrations. Exercise was able to specifically influence different immunological parameters. In summary, our data fit the hypothesis of immunoprotection by exercise and may point toward even superior effects by resistive vibration exercise.

journal_name

Cell Mol Immunol

journal_title

Cellular & molecular immunology

authors

Hoff P,Belavý DL,Huscher D,Lang A,Hahne M,Kuhlmey AK,Maschmeyer P,Armbrecht G,Fitzner R,Perschel FH,Gaber T,Burmester GR,Straub RH,Felsenberg D,Buttgereit F

doi

10.1038/cmi.2014.106

subject

Has Abstract

pub_date

2015-07-01 00:00:00

pages

483-92

issue

4

eissn

1672-7681

issn

2042-0226

pii

cmi2014106

journal_volume

12

pub_type

杂志文章,随机对照试验

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