SGK1-dependent upregulation of connective tissue growth factor by angiotensin II.
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SGK1-dependent upregulation of connective tissue growth factor by angiotensin II. / Hussain, Azeemudeen; Wyatt, Amanda W; Wang, Kan; Bhandaru, Madhuri; Biswas, Raja; Avram, Diana; Föller, Michael; Rexhepaj, Rexhep; Friedrich, Björn; Ullrich, Susanne; Müller, Gerhard; Kuhl, Dietmar; Risler, Teut; Lang, Florian.
in: KIDNEY BLOOD PRESS R, Jahrgang 31, Nr. 2, 2, 2008, S. 80-86.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - SGK1-dependent upregulation of connective tissue growth factor by angiotensin II.
AU - Hussain, Azeemudeen
AU - Wyatt, Amanda W
AU - Wang, Kan
AU - Bhandaru, Madhuri
AU - Biswas, Raja
AU - Avram, Diana
AU - Föller, Michael
AU - Rexhepaj, Rexhep
AU - Friedrich, Björn
AU - Ullrich, Susanne
AU - Müller, Gerhard
AU - Kuhl, Dietmar
AU - Risler, Teut
AU - Lang, Florian
PY - 2008
Y1 - 2008
N2 - Angiotensin II has previously been shown to trigger fibrosis, an effect involving connective tissue growth factor (CTGF). The signaling pathways linking angiotensin II to CTGF formation are, however, incompletely understood. A gene highly expressed in fibrosing tissue is the serum- and glucocorticoid-inducible kinase SGK1. The present study explored whether SGK1 is transcriptionally regulated by angiotensin II and participates in the angiotensin II-dependent regulation of CTGF expression. To this end, experiments have been performed in human kidney fibroblasts and mouse lung fibroblasts from gene-targeted mice lacking SGK1 (sgk1-/-) and their wild-type littermates (sgk1+/+). In human renal fibroblasts, SGK1 and CTGF protein expression were enhanced by angiotensin II (10 nM) within 4 h. In sgk1+/+ mouse fibroblasts, SGK1 transcript levels were significantly increased after 4 h of angiotensin II treatment. Angiotensin II stimulated both transcript and protein abundance of CTGF in fibroblasts from sgk1+/+ mice, effects significantly blunted in fibroblasts of sgk1-/- mice. In conclusion, angiotensin II stimulates the expression of SGK1, which is in turn required for the stimulating effect of angiotensin II on the expression of CTGF. Thus, SGK1 presumably contributes to the profibrotic effect of angiotensin II.
AB - Angiotensin II has previously been shown to trigger fibrosis, an effect involving connective tissue growth factor (CTGF). The signaling pathways linking angiotensin II to CTGF formation are, however, incompletely understood. A gene highly expressed in fibrosing tissue is the serum- and glucocorticoid-inducible kinase SGK1. The present study explored whether SGK1 is transcriptionally regulated by angiotensin II and participates in the angiotensin II-dependent regulation of CTGF expression. To this end, experiments have been performed in human kidney fibroblasts and mouse lung fibroblasts from gene-targeted mice lacking SGK1 (sgk1-/-) and their wild-type littermates (sgk1+/+). In human renal fibroblasts, SGK1 and CTGF protein expression were enhanced by angiotensin II (10 nM) within 4 h. In sgk1+/+ mouse fibroblasts, SGK1 transcript levels were significantly increased after 4 h of angiotensin II treatment. Angiotensin II stimulated both transcript and protein abundance of CTGF in fibroblasts from sgk1+/+ mice, effects significantly blunted in fibroblasts of sgk1-/- mice. In conclusion, angiotensin II stimulates the expression of SGK1, which is in turn required for the stimulating effect of angiotensin II on the expression of CTGF. Thus, SGK1 presumably contributes to the profibrotic effect of angiotensin II.
U2 - 10.1159/000119703
DO - 10.1159/000119703
M3 - SCORING: Zeitschriftenaufsatz
VL - 31
SP - 80
EP - 86
JO - KIDNEY BLOOD PRESS R
JF - KIDNEY BLOOD PRESS R
SN - 1420-4096
IS - 2
M1 - 2
ER -