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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Biochim+Biophys+Acta
2010 ; 1802
(12
): 1237-45
Nephropedia Template TP
gab.com Text
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English Wikipedia
The sodium pump and cardiotonic steroids-induced signal transduction protein
kinases and calcium-signaling microdomain in regulation of transporter
trafficking
#MMPMID20144708
Liu J
; Xie ZJ
Biochim Biophys Acta
2010[Dec]; 1802
(12
): 1237-45
PMID20144708
show ga
The Na/K-ATPase was discovered as an energy transducing ion pump. A major
difference between the Na/K-ATPase and other P-type ATPases is its ability to
bind a group of chemicals called cardiotonic steroids (CTS). The plant-derived
CTS such as digoxin are valuable drugs for the management of cardiac diseases,
whereas ouabain and marinobufagenin (MBG) have been identified as a new class of
endogenous hormones. Recent studies have demonstrated that the endogenous CTS are
important regulators of renal Na(+) excretion and blood pressure. The Na/K-ATPase
is not only an ion pump, but also an important receptor that can transduce the
ligand-like effect of CTS on intracellular protein kinases and Ca(2+) signaling.
Significantly, these CTS-provoked signaling events are capable of reducing the
surface expression of apical NHE3 (Na/H exchanger isoform 3) and basolateral
Na/K-ATPase in renal proximal tubular cells. These findings suggest that
endogenous CTS may play an important role in regulation of tubular Na(+)
excretion under physiological conditions; conversely, a defect at either the
receptor level (Na/K-ATPase) or receptor-effector coupling would reduce the
ability of renal proximal tubular cells to excrete Na(+), thus
culminating/resulting in salt-sensitive hypertension.