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Akamatsu, Naoaki; Sawada, Shohei; Komatsu, Sumio; Tamagaki, Toshiyuki; Hiranuma, Osamu; Kawahara, Takeshi; Tsuda, Yutaka; Kono, Yoshihito; Higaki, Tadashi; Tada, Yusuke; Yamasaki, Seiki; Imamura, Hitoshi; Sato, Toshiyuki; Tsuji, Hajime; Nakagawa, Masao
Journal of cardiovascular pharmacology, 2001-August, Letnik: 38, Številka: 2Journal Article
The purpose of this study was to evaluate the effects of cicletanine, a slightly diuretic antihypertensive drug, on human vascular endothelial cells with regard to nitric oxide, intracellular calcium concentration (Cai), cyclic nucleotide, inositol 1,4,5-trisphosphate (IP3), and prostacyclin generation. Primary cultured human umbilical vein endothelial cells were used in this study. Cai was measured by fura-2/AM. Cyclic adenosine monophosphate (AMP), cyclic guanosine monophosphate (GMP), IP3, and prostacyclin were measured by radioimmunoassay. Nitric oxide was measured by the Griess method. Cicletanine had no effect on Cai. Cicletanine (10-10 M) increased cyclic GMP but decreased prostacyclin generation. Cicletanine had no stimulating effect on cyclic AMP or IP3 generation. IP3 increased Ca release from storage sites. Cicletanine decreased prostacyclin generation via increase in cyclic GMP. Cicletanine had no stimulating effect on nitrogen oxides for 2 h after incubation but increased it after 3-24 h. Pretreatment with L-N-monomethyl-arginine (L-NMMA) prevented this increase. The inhibitory effect of L-NMMA was prevented by pretreatment with L-arginine. These results indicate that nitric oxide and cyclic GMP may contribute to the antihypertensive action of cicletanine.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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