生理性深层海水对小鼠高温耐受力的影响

摘要

Objective To explore the effects of physiological deep-sea water(PDSW) on hyperthermal tolerance of Kunming (KM ) mice in the 45 .0 ℃ environment .Methods Deep-sea water from the south Chinese sea was processed ,and the metallic ele-ments dissolved in the DSW were analysed .The mice were randomly divided into 2 groups :the control group received tap water ;the experimental group treated with PDSW for 15 d .And then the mice were fed in the 45 .0 ℃ conditions .The survival time and histo-morphometric analyses of the brain ,lung ,heart ,liver and kidney were investigated .Results The survival time in PDSW-fed group was significantly longer than that of the control group (P< 0 .05) .Moreover ,histomorphometric analyses showed that PDSW could protect the brain ,lung ,heart ,liver and kidney of KM mice from the 45 .0 ℃ conditions .The results of western blot revealed that ex-pression of HSP72 of liver tissues for PDSW-fed group substantially increased ,when compared with the control mice(P< 0 .05) . Conclusion PDSW could improve hyperthermal tolerance of KM mice ,which maybe in the relation with expression of HSP72 pro-moted by PDSW .%目的：探讨生理性深层海水（PDSW）对45．0℃高温环境动物耐受性的影响及机制。方法将取自我国海南省海域的深层海水进行制备，制成 PDSW ，检测所含有的部分元素。20只昆明小鼠，雌雄各半，分为对照组和实验组，对照组小鼠饮用自来水，实验组饮用 PDSW ，连续15 d ，然后把各组小鼠放入45．0℃高温环境下饲养，记录每只小鼠死亡时间，直至各组小鼠全部死亡为止。并取每只小鼠脑、肺、心、肝和肾做病理检查。结果无论是雌性小鼠还是雄性小鼠，实验组的小鼠在45．0℃高温下的生存时间比对照组的小鼠长，差异有统计学意义（P＜0．05）。并且雌性小鼠的生存时间要比雄性小鼠的生存时间长，差异有统计学意义（P＜0．05）。组织学分析表明 PDSW 对实验小鼠的脑、心、肺、肝、肾等器官均有保护作用。 Western blot 检测发现，实验组小鼠肝组织 HSP72表达较对照组强，差异有统计学意义（P ＜0．05）。结论 PDSW 可以增强小鼠对45．0℃高温环境的耐受性，其机制考虑与 PDSW 促进热休克蛋白表达有关。