TY - JOUR
T1 - Atrial natriuretic factor and cyclic guanosine 3',5'-monophosphate in vascular smooth muscle
AU - Sato, Makito
AU - Abe, Keishi
AU - Takeuchi, Kazuhisa
AU - Yasujima, Minoru
AU - Omata, Ken
AU - Hiwatari, Masao
AU - Kasai, Yutaka
AU - Tanno, Masaya
AU - Kohzuki, Masahiro
AU - Kudo, Kei
AU - Yoshinaga, Kaoru
AU - Inagami, Tadashi
PY - 1986/9
Y1 - 1986/9
N2 - To elucidate the molecular mechanism of the vascular action of atrial natriuretic factor (ANF), we investigated the effects of synthetic ANF and sodium nitroprusside on the levels of intracellular cyclic nucleotides and prostacyclin (measured as its stable metabolite 6-keto-prostaglandin F,J in cultured vascular smooth muscle cells from rat mesenteric artery and, in some experiments, from rat renal artery. Both ANF and sodium nitroprusside increased intracellular cyclic guanosine 3',5'- monophosphate (cGMP) levels in a dose-dependent manner but did not affect cyclic adenosine 3',5'- monophosphate levels or 6-keto-prostaglandin F1α synthesis. The stimulatory effects of ANF and sodium nitroprusside on cGMP levels were additive. Neither the deprivation of extracellular Ca2+ nor calcium entry blockers affected ANF-stimulated cGMP levels. Preincubation of ANF or sodium nitroprusside with kallikrein attenuated only the effect of ANF on cGMP levels. The effect of kallikrein was abolished by serine protease inhibitors. In contrast, the oxidant methylene blue inhibited the effect of sodium nitroprusside on cGMP levels, but not that of ANF. The stimulatory effect of ANF on cGMP levels was greater in cells from renal artery than in those from mesenteric artery. These results in cultured vascular smooth muscle cells further support the hypothesis that cGMP mediates the vasorelaxant action of ANF.
AB - To elucidate the molecular mechanism of the vascular action of atrial natriuretic factor (ANF), we investigated the effects of synthetic ANF and sodium nitroprusside on the levels of intracellular cyclic nucleotides and prostacyclin (measured as its stable metabolite 6-keto-prostaglandin F,J in cultured vascular smooth muscle cells from rat mesenteric artery and, in some experiments, from rat renal artery. Both ANF and sodium nitroprusside increased intracellular cyclic guanosine 3',5'- monophosphate (cGMP) levels in a dose-dependent manner but did not affect cyclic adenosine 3',5'- monophosphate levels or 6-keto-prostaglandin F1α synthesis. The stimulatory effects of ANF and sodium nitroprusside on cGMP levels were additive. Neither the deprivation of extracellular Ca2+ nor calcium entry blockers affected ANF-stimulated cGMP levels. Preincubation of ANF or sodium nitroprusside with kallikrein attenuated only the effect of ANF on cGMP levels. The effect of kallikrein was abolished by serine protease inhibitors. In contrast, the oxidant methylene blue inhibited the effect of sodium nitroprusside on cGMP levels, but not that of ANF. The stimulatory effect of ANF on cGMP levels was greater in cells from renal artery than in those from mesenteric artery. These results in cultured vascular smooth muscle cells further support the hypothesis that cGMP mediates the vasorelaxant action of ANF.
KW - Atrial natriuretic factor
KW - Cyclic guanosine 3',5'-monophosphate
KW - Kallikrein
KW - Methylene blue
KW - Sodium nitroprusside
KW - Vascular smooth muscle cell
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U2 - 10.1161/01.HYP.8.9.762
DO - 10.1161/01.HYP.8.9.762
M3 - Article
C2 - 3017853
AN - SCOPUS:0022442521
VL - 8
SP - 762
EP - 771
JO - Hypertension
JF - Hypertension
SN - 0194-911X
IS - 9
M1 - 00007
ER -