Supported by National Natural Science Foundation of China,No.31271290 and No.31000514;Scientific Research Key Program of Beijing Municipal Commission of Education No.KZ201310025020;Beijing Postdoctoral Research Foundation;Beijing Natural Science Foundation No.7142025
AIM: To investigate whether Na<sup>+sup>-K<sup>+sup>-2Cl<sup>-sup> cotransporter (NKCC2) is expressed in the mouse distal colonic epithelia and whether it is regulated by vasopressin in the colon.