Objectives: We investigated an influence of salt intake during gestation or lactation in salt preference of weaning Dahl salt sensitive (Dahl S) strain. Material and Methods: Nine-week-old female Dahl S rats, after ma...Objectives: We investigated an influence of salt intake during gestation or lactation in salt preference of weaning Dahl salt sensitive (Dahl S) strain. Material and Methods: Nine-week-old female Dahl S rats, after mated with the male, were divided into 1) high-salt group fed a 4% NaCl diet (high-salt mother) or 2) low-salt group fed a 0.3% NaCl diet (low-salt mother) during gestation or lactation periods. Using 0.4%, 0.6% and 0.8% (w/v) saline solutions, we assessed salt preference in their offspring after weaning. Systolic blood pressure (SBP) was determined by tail cuff method. Results: Both the male and female offspring from low-salt mothers during gestation consumed equal amounts of any saline solution. However, the amount of each saline solution was higher in the offspring of low-salt mothers than those of high-salt mothers. This resulted in a significant increase of salt intake in both the male and female offspring of low-salt mothers compared with those of high-salt mothers. In contrast, both the male and female offspring from low-mothers during lactation rather preferred the lower concentration of saline solution, and this resulted in less salt intake in the offspring of low-salt mothers than those of high-salt mothers. Conclusions: We demonstrated that low salt diet in pregnant mothers increased salt intake of their offspring. The offspring of mothers fed a low salt diet during lactation had less salt than those of high-salt mothers. The influence of salt intake of mothers in their offspring varies along with the growth stage of their babies.展开更多
目的观察电针对正常高值血压盐敏感大鼠肾脏内质网应激时GRP78、CHOP及肾细胞凋亡的影响,探讨电针调节内质网应激保护肾脏的作用机制。方法将24只7周龄雄性Dahl盐敏感大鼠(Dahl salt sensitive rat,DS)按随机数字表法随机分为模型组、...目的观察电针对正常高值血压盐敏感大鼠肾脏内质网应激时GRP78、CHOP及肾细胞凋亡的影响,探讨电针调节内质网应激保护肾脏的作用机制。方法将24只7周龄雄性Dahl盐敏感大鼠(Dahl salt sensitive rat,DS)按随机数字表法随机分为模型组、针刺组、非经非穴组。另将8只同龄雄性盐抵抗大鼠(Dahl salt resistant rats,DR)设为空白组。采用8%高盐饲料喂养法制备正常高值血压模型。正常高值血压大鼠模型为BP130~139/85~89 mm Hg。造模成功后改为普通饲料喂养。空白组、模型组每天捆绑固定20 min,不作其他干预;针刺组予双侧足三里、曲池电针治疗20 min;非经非穴组在双侧髂脊上10~15 mm、后正中线旁开20 mm区段内选择1个固定对照点电针治疗20 min。每日1次,每周6天,休息1 d,连续治疗4周。取大鼠肾组织,采用荧光定量PCR法和蛋白免疫印迹法(Western bolt)检测GRP78、CHOP的表达,采用TUNEL检测肾细胞凋亡水平。结果干预4周后,与模型组比较,针刺组血压显著降低(P<0.05),非经非穴组血压差异无统计学意义(P>0.05);针刺组GRP78、CHOP的mRNA和蛋白表达及肾细胞凋亡率显著降低(P<0.05)。与针刺组比较,非经非穴组GRP78、CHOP的mRNA和蛋白表达及肾细胞凋亡率差异有统计学意义(P<0.05)。结论电针足三里、曲池可能通过抑制内质网应激,抑制肾细胞凋亡,对正常高值血压DS大鼠肾脏起到保护作用。展开更多
肾脏调控着机体的水盐代谢、血容量和血管阻力,是参与血压调节的主要靶器官。高盐饮食会诱发盐敏感个体水钠潴留以及持续性的内皮功能障碍,并促成血压升高。Dahl盐敏感(Dahl salt sensitive,Dahl-SS)大鼠作为研究盐敏感高血压的经典动...肾脏调控着机体的水盐代谢、血容量和血管阻力,是参与血压调节的主要靶器官。高盐饮食会诱发盐敏感个体水钠潴留以及持续性的内皮功能障碍,并促成血压升高。Dahl盐敏感(Dahl salt sensitive,Dahl-SS)大鼠作为研究盐敏感高血压的经典动物模型,具备血压的盐敏感性、高脂血症、胰岛素抵抗、肾功能衰竭、尿蛋白分泌增加以及低血浆肾素活性等和人类盐敏感高血压患者相类似的病理生理学特征,并能够稳定遗传。本文结合近年对Dahl-SS大鼠肾脏生理学和生物化学方面的研究以及多组学研究成果,对盐敏感高血压的发生、发展与肾脏氧化还原代谢、一氧化氮代谢、氨基酸代谢、糖脂代谢之间的关系进行了归纳和总结。展开更多
文摘Objectives: We investigated an influence of salt intake during gestation or lactation in salt preference of weaning Dahl salt sensitive (Dahl S) strain. Material and Methods: Nine-week-old female Dahl S rats, after mated with the male, were divided into 1) high-salt group fed a 4% NaCl diet (high-salt mother) or 2) low-salt group fed a 0.3% NaCl diet (low-salt mother) during gestation or lactation periods. Using 0.4%, 0.6% and 0.8% (w/v) saline solutions, we assessed salt preference in their offspring after weaning. Systolic blood pressure (SBP) was determined by tail cuff method. Results: Both the male and female offspring from low-salt mothers during gestation consumed equal amounts of any saline solution. However, the amount of each saline solution was higher in the offspring of low-salt mothers than those of high-salt mothers. This resulted in a significant increase of salt intake in both the male and female offspring of low-salt mothers compared with those of high-salt mothers. In contrast, both the male and female offspring from low-mothers during lactation rather preferred the lower concentration of saline solution, and this resulted in less salt intake in the offspring of low-salt mothers than those of high-salt mothers. Conclusions: We demonstrated that low salt diet in pregnant mothers increased salt intake of their offspring. The offspring of mothers fed a low salt diet during lactation had less salt than those of high-salt mothers. The influence of salt intake of mothers in their offspring varies along with the growth stage of their babies.
基金supported by the National Natural Science Foundation of China(No.81770728,82070751)。
文摘肾脏调控着机体的水盐代谢、血容量和血管阻力,是参与血压调节的主要靶器官。高盐饮食会诱发盐敏感个体水钠潴留以及持续性的内皮功能障碍,并促成血压升高。Dahl盐敏感(Dahl salt sensitive,Dahl-SS)大鼠作为研究盐敏感高血压的经典动物模型,具备血压的盐敏感性、高脂血症、胰岛素抵抗、肾功能衰竭、尿蛋白分泌增加以及低血浆肾素活性等和人类盐敏感高血压患者相类似的病理生理学特征,并能够稳定遗传。本文结合近年对Dahl-SS大鼠肾脏生理学和生物化学方面的研究以及多组学研究成果,对盐敏感高血压的发生、发展与肾脏氧化还原代谢、一氧化氮代谢、氨基酸代谢、糖脂代谢之间的关系进行了归纳和总结。
