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2017 ; 2
(13
): ä Nephropedia Template TP
gab.com Text
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English Wikipedia
A salt-sensing kinase in T lymphocytes, SGK1, drives hypertension and
hypertensive end-organ damage
#MMPMID28679951
Norlander AE
; Saleh MA
; Pandey AK
; Itani HA
; Wu J
; Xiao L
; Kang J
; Dale BL
; Goleva SB
; Laroumanie F
; Du L
; Harrison DG
; Madhur MS
JCI Insight
2017[Jul]; 2
(13
): ä PMID28679951
show ga
We previously showed that angiotensin II (Ang II) increases T cell production of
IL-17A, and that mice deficient in IL-17A have blunted hypertension and
attenuated renal and vascular dysfunction. It was recently shown that salt
enhances IL-17A production from CD4+ T cells via a serum- and
glucocorticoid-regulated kinase 1-dependent (SGK1-dependent) pathway. Thus, we
tested the hypothesis that SGK1 signaling in T cells promotes hypertension and
contributes to end-organ damage. We show that loss of T cell SGK1 results in a
blunted hypertensive response to Ang II infusion by 25 mmHg. Importantly, renal
and vascular inflammation is abrogated in these mice compared with control mice.
Furthermore, mice lacking T cell SGK1 are protected from Ang II-induced
endothelial dysfunction and renal injury. Loss of T cell SGK1 also blunts blood
pressure and vascular inflammation in response to deoxycorticosterone
acetate-salt (DOCA-salt) hypertension. Finally, we demonstrate that the
Na+-K+-2Cl- cotransporter 1 (NKCC1) is upregulated in Th17 cells and is necessary
for the salt-induced increase in SGK1 and the IL-23 receptor. These studies
demonstrate that T cell SGK1 and NKCC1 may be novel therapeutic targets for the
treatment of hypertension and identify a potentially new mechanism by which salt
contributes to hypertension.