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Alleviating effects of dehydration under no hyperthermia on the immunomodulatory response to the polysaccharide fraction from fu-ling （Poria cocos） in male collegiate wrestlers

引用

Chinese Medical Journal 2011年第4期124卷 530-536页

作者： JANG Tsong-rong KAO Ming-feng CHEN Chun-hao HSIEH Kuen-chang LAI Wen-yam CHEN Yu-yawn Athletics Department and Graduate School National Taiwan College of Physical EducationTaichung Taiwan China Department and Graduate School of Physical Education National Taiwan College of Physical EducationTaichung Taiwan China Department of Sport Tunghai University Taichung Taiwan China Research Center Charder Electronic Co. Ltd Taichung TaiwanChina Department and Graduate School of Physical Education National Taiwan College of Physical EducationTaichung Taiwan China

Background It is well known that dehydration can impair bodily functions. To evaluate the impact of hydration status under ambient environmental temperature on the immune system, 25 male collegiate wrestlers were recruited to undergo an experimental dehydration *** Thirteen subjects had controlled diets with individual energy requirements to prevent body mass loss and restricted water intake to cause 4.52% dehydration; they formed the dehydrated group （DE）. These subjects developed a urine specific gravity of about 1.030 in 84 hours. Twelve other subjects had no water restriction and maintained their total body weight comprised the euhydrated group （EU）. Peripheral blood monocytes （PBMNC） were isolated after dehydration to perform immune response testing by being incubated with a polysaccharide fraction from fu-ling, Poria cocos （polysaccharide fraction from Poria cocos, PCPS, 1-30 μg/L）, to prepare a conditioned medium termed conditioned medium of PBMNC stimulated by PCPS （PCPS-MNC-CM）. More PCPS （25 μg/L） was needed in the DE group to prepare the PCPS-MNC-CM, which was assayed with a growth inhibitory curve for treated U973 *** The treated U937 cells, incubated together with PCPS-MNC-CM from the DE group, exhibited a much lower nitroblue tetrazolium （NBT） positive value of （63.7±4.7）%. The concentration of interferon-gamma （IFN-Y）, interleukin （IL）-1β and tumor necrosis factor （TNF）-α in PCPS-MNC-CM from subjects after dehydration was much lower than in the CM from the EU *** The immune response to PCPS in the DE group was lower than in normally hydrated subjects.

关键词： dehydration mononuclear cells immunmodulatory U937 wrestlers

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