Transforming growth factor beta 1 modulates angiotensin II-induced calcium influx in vascular smooth muscle.
Eur J Clin Invest
; 25(5): 317-21, 1995 May.
Article
em En
| MEDLINE
| ID: mdl-7628518
ABSTRACT
The modulatory effects of transforming growth factor beta 1 (TGF beta 1) on the angiotensin II (Ang II)-induced increase in cytosolic free calcium concentration ([Ca2+]i) were investigated in vascular smooth muscle cells (VSMC) from spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto rats (WKY). [Ca2+]i in VSMC was measured using the fluorescent dye fura-2. When TGF beta 1 was applied 30s prior to Ang II, the Ang II-induced [Ca2+]i increase was significantly enhanced in VSMC from SHR (P < 0.05 compared to control), whereas after the preincubation with TGF beta 1 for 30 min, the Ang II-induced [Ca2+]i increase was significantly reduced in VSMC from both strains. Using the manganese-quenching technique, it was confirmed that short-term exposure to TGF beta 1 enhanced the Ang II-induced trans-plasma-membrane calcium influx in SHR. The inhibition of protein kinase C by calphostin C abolished the stimulatory effect of TGF beta 1 on the Ang II-induced [Ca2+]i increase. It is concluded that TGF beta 1 modulates the Ang II-induced calcium handling in VSMC.
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Base de dados:
MEDLINE
Assunto principal:
Angiotensina II
/
Cálcio
/
Fator de Crescimento Transformador beta
/
Hipertensão
/
Músculo Liso Vascular
Limite:
Animals
Idioma:
En
Ano de publicação:
1995
Tipo de documento:
Article