期刊
JOURNAL OF PHYSIOLOGICAL SCIENCES
卷 71, 期 1, 页码 -出版社
BMC
DOI: 10.1186/s12576-020-00784-9
关键词
DRA; NaCl absorption; Congenital chloride-losing diarrhea; Feces
类别
资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan (KAKEN) [21590236]
- Grants-in-Aid for Scientific Research [21590236] Funding Source: KAKEN
The anion exchanger DRA plays a key role in Cl- absorption and HCO3- secretion in the mouse cecum and middle-distal colon, with potential implications for water absorption and luminal acid/base regulation in these segments.
The anion exchanger slc26a3 (DRA), which is mutated in congenital chloride-losing diarrhea, is expressed in the apical membrane of the cecum and middle-distal colon but not in the proximal colon of rodent large intestines. To elucidate the functional roles of DRA, we measured unidirectional Cl-36(-) and Na-22(+) fluxes and HCO3- secretion in vitro in each of these segments using DRA-KO mice. Robust Cl- absorption, which was largely abolished after DRA deficiency, was present in the cecum and middle-distal colon but absent in the proximal colon. Na+ absorption was present in all three segments in both the control and DRA-KO mice. The luminal-Cl--dependent HCO3- secretions in the cecum and middle-distal colon were abolished in the DRA-KO mice. In conclusion, DRA mediates Cl- absorption and HCO3- secretion in the mouse cecum and middle-distal colon, and may have roles in H2O absorption and luminal acid/base regulation in these segments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据