Group VIA phospholipase A2 is a target for vasopressin signaling in the thick ascending limb.
Group VIA phospholipase A2 is a target for vasopressin signaling in the thick ascending limb.
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VIA 组磷脂酶 A2 是粗升肢中加压素信号传导的靶标
DOI:
10.1152/ajprenal.00222.2011
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Bachmann S.
中科院分区:
文献类型:
--
作者:
Paliege A;Roeschel T;Neymeyer H;Seidel S;Kahl T;Daigeler A.L;Mutig K;Mrowka R;Ferreri N.R;Wilson B.S;Himmerkus N;Bleich M. ;Bachmann S.
Na+-K+-2Cl−cotransporter (NKCC2)-mediated NaCl reabsorption in the thick ascending limb (TAL) is stimulated by AVP via V2 receptor/PKA/cAMP signaling. This process is antagonized by locally produced eicosanoids such as 20-HETE or prostaglandin E2, which are synthesized in a phospholipase A2-dependent reaction cascade. Using microarray-based gene expression analysis, we found evidence for an AVP-dependent downregulation of the calcium-independent isoform of PLA2, iPLA2β, in the outer medulla of rats. In the present study, we therefore examined the contribution of iPLA2β to NKCC2 regulation. Immunoreactive iPLA2β protein was detected in cultured mTAL cells as well as in the entire TAL of rodents and humans with the exception of the macula densa. Administration of the V2 receptor-selective agonist desmopressin (5 ng/h; 3 days) to AVP-deficient diabetes insipidus rats increased outer medullary phosphorylated NKCC2 (pNKCC2) levels more than twofold in association with a marked reduction in iPLA2β abundance (−65%;P< 0.05), thus confirming microarray results. Inhibition of iPLA2β in Sprague-Dawley rats with FKGK 11 (0.5 μM) or in mTAL cells with FKGK 11 (10 μM) or (S)-bromoenol lactone (5 μM) for 1 h markedly increased pNKCC2 levels without affecting total NKCC2 expression. Collectively, these data indicate that iPLA2β acts as an inhibitory modulator of NKCC2 activity and suggest that downregulation of iPLA2β may be a relevant step in AVP-mediated urine concentration.
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DOI:
10.1152/ajprenal.90227.2008
发表时间:
2008-09
期刊:
American journal of physiology. Renal physiology
影响因子:
--
作者:
P. Welker;Alexandra Böhlick;K. Mutig;M. Salanova;T. Kahl;H. Schlüter;D. Blottner;José Ponce‐Coria;G. Gamba;S. Bachmann
通讯作者:
P. Welker;Alexandra Böhlick;K. Mutig;M. Salanova;T. Kahl;H. Schlüter;D. Blottner;José Ponce‐Coria;G. Gamba;S. Bachmann
影响因子:
--
作者:
H. Valtin;H. Schroeder
通讯作者:
H. Schroeder
影响因子:
15.9
作者:
HARRIS, RC;MCKANNA, JA;BREYER, MD
通讯作者:
BREYER, MD
DOI:
--
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Carroll,MA;Sala,A;Dunn,CE;McGiff,JC;Murphy,RC
通讯作者:
Murphy,RC
DOI:
10.1152/ajprenal.00426.2006
发表时间:
2007-10-01
影响因子:
4.2
作者:
Eng, Ben;Mukhopadhyay, Somshuvra;Ferreri, Nicholas R.
通讯作者:
Ferreri, Nicholas R.