摘要
目的 :研究锌对寒区新兵促肾上腺皮质激素 (ACTH)分泌及耐寒的作用。方法 :选西北某部集训期新兵 5 4人 ,分为普食对照组 (2 5人 )和普食加锌组 (2 9人 ,每人补锌 30mg·d- 1) ,2 5d补锌前后 ,分别测定冷暴露 4h后血浆促上腺皮质激素 (ACTH)水平、血浆锌浓度以及冷暴露4h前后直肠温度、胸部皮温等。结果 :膳食调查结果显示 ,两组战士热能及各种营养素的摄取量基本满足要求 ,锌摄入量为 12 .5mg ,补锌后战士冷暴露后ACTH水平为 (5 36± 5 0 )ng·L- 1低于补锌前的 (710± 33)ng·L- 1和对照组相应时间的 (6 90± 4 5 )ng·L- 1,(P <0 .0 5 )。血清锌水平没有明显差异。补锌后、冷暴露后 ,直肠温度和胸部皮温下降的幅度分别为 (0 .6 2± 0 .0 4 )℃和 (0 .5 4±0 .0 1)℃ ,低于实验前的 (0 .80± 0 .0 8)℃和 (1.0 5± 0 .0 9)℃ ,(P <0 .0 5 )。结论
Objective:To study the effects of zinc on ACTH secretion and cold endurance of recruits in cold environment.Methods:54 recruits from cold area were randomized into two groups, Group 1 served as control group (25 recruits,normal diet, the average zinc intake:12.5 mg·d -1),Group 2 served as zinc supplemented group (29 recruits, normal diet with zinc supplement of 30 mg·d -1). The rectal and chest skin temperature before and after cold exposure (-7 ℃～-9 ℃,4 h,with winter clothes, no wind), ACTH and zinc concentration in plasma after cold exposure were assayed before and after 25 day Zn supplementation.Results: ACTH level in plasma of Group 2 was decreased significantly as compared to that of the control after cold exposure and 25 day zinc supplementation 〔(536±50)ng·L -1vs(690±45)ng·L -1,P<0.05〕 and was also lower than that before supplementation〔(710±33)ng·L -1P<0.05〕. The decreased ranges of rectal and chest skin temperature during cold exposure of Group 2 were lower than those before 25 d zinc supplementation 〔(0.62±0.04)℃ vs (0.80±0.08)℃ and (0.54±0.01)℃ vs (1.05±0.09)℃, P<0.05,P<0.01 respectively 〕.Conclusion:Zinc might play an important role in cold stress and cold endurance.
出处
《解放军预防医学杂志》
CAS
北大核心
2002年第2期96-98,共3页
Journal of Preventive Medicine of Chinese People's Liberation Army
基金
全军青年基金课题 (No .99Q0 81)
