Journal
MOLECULAR AND CELLULAR BIOCHEMISTRY
Volume 367, Issue 1-2, Pages 175-183Publisher
SPRINGER
DOI: 10.1007/s11010-012-1331-x
Keywords
Ouabain; Na/K-ATPase signaling; Na/K-ATPase; NHE3; Redistribution
Categories
Funding
- National Institutes of Health [HL-105649, HL-109015, GM-78565]
Ask authors/readers for more resources
We have demonstrated that ouabain regulates protein trafficking of the Na/K-ATPase alpha 1 subunit and NHE3 (Na/H exchanger, isoform 3) via ouabain-activated Na/K-ATPase signaling in porcine LLC-PK1 cells. To investigate whether this mechanism is species-specific, ouabain-induced regulation of the alpha 1 subunit and NHE3 as well as transcellular Na-22(+) transport were compared in three renal proximal tubular cell lines (human HK-2, porcine LLC-PK1, and AAC-19 originated from LLC-PK1 in which the pig alpha 1 was replaced by ouabain-resistant rat alpha 1). Ouabain-induced inhibition of transcellular Na-22(+) transport is due to an ouabain-induced redistribution of the alpha 1 subunit and NHE3. In LLC-PK1 cells, ouabain also inhibited the endocytic recycling of internalized NHE3, but has no significant effect on recycling of endocytosed alpha 1 subunit. These data indicated that the ouabain-induced redistribution of the alpha 1 subunit and NHE3 is not a species-specific phenomenon, and ouabain-activated Na/K-ATPase signaling influences NHE3 regulation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available