IMMUNOSUPPRESSION IN ADULT FEMALE B6C3F1 MICE BY CHRONIC EXPOSURE TO ETHANOL IN A LIQUID DIET

被引:15
|
作者
HOLSAPPLE, MP
EADS, M
STEVENS, WD
WOOD, SC
KAMINSKI, NE
MORRIS, DL
POKLIS, A
KAMINSKI, EJ
JORDAN, SD
机构
[1] VIRGINIA COMMONWEALTH UNIV, MED COLL VIRGINIA, DEPT PATHOL, RICHMOND, VA 23298 USA
[2] NORTHWESTERN UNIV, SCH MED, DEPT PATHOL, CHICAGO, IL 60611 USA
来源
IMMUNOPHARMACOLOGY | 1993年 / 26卷 / 01期
关键词
CHRONIC ETHANOL EXPOSURE; PAIR-FEEDING PARADIGM; IMMUNE FUNCTION; STEATOSIS;
D O I
10.1016/0162-3109(93)90064-W
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
The overall objective of these studies was to characterize the effects of ethanol on the immunocompetence of adult female B6C3F1 mice. To obtain a significant suppression in the antibody response to SRBC, splenocytes from untreated mice had to be directly exposed to concentrations of ethanol from 0.3% to 3.0%, or to acetaldehyde at concentrations greater than 0.03%. We do not believe that these results are consistent with a role by a direct effect by either ethanol or its primary metabolite because these concentrations are higher than what could be obtained as reasonable blood levels. For in vivo exposure, we employed a pair-feeding regimen which was based on a liquid diet containing 5% ethanol (v/v) that provided 36% of the caloric intake as ethanol. Our results indicated that there was a definite temporal relationship to the consequent suppression of the antibody response to SRBC in that no effect was observed after 14 days exposure, and that the magnitude of the suppression increased from 18% after 21 days to 70% after 42 days. We also monitored the liver for histopathology and observed that the ethanol-induced liver damage was restricted to steatosis (fatty liver), which was also manifested with time and which was most pronounced after 42 days exposure. In contrast to our results with the in vivo antibody response, we saw no effect on mitogen-induced proliferation by splenocytes from ethanol-treated mice. These results prompted us to measure in vitro antibody responses by splenocytes from ethanol-treated mice. We saw no suppression of the in vitro antibody responses to SRBC, DNP-Ficoll or LPS after any length of exposure to ethanol, and speculated that the basis for the suppression of the in vivo antibody response was an indirect consequence of exposure. We subsequently determined that when normal splenocytes were cultured in 5% serum from ethanol-exposed mice (42-day group), there was a >80% suppression relative to the serum from the pair-fed controls. As important controls for these studies, we have demonstrated that there was no difference between the responses of normal lymphocytes cultured in 5% normal mouse serum and in 5% serum taken from the pair-fed restricted controls. A determination of the ethanol content in the serum from ethanol-exposed mice (42-day group) indicated that the amount of ethanol present in these cultures was <0.003%. These results suggest that the mechanism of ethanol-induced immunosuppression is at least in part due to an indirect consequence of chronic exposure, which is possibly mediated by a serum factor.
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收藏
页码:31 / 51
页数:21
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