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• W2431174548 endingPage "474" @default.
• W2431174548 startingPage "467" @default.
• W2431174548 abstract "We obtained a primary culture of prostatic cells through explantation from patients with benign prostatic hyperplasia. Structural morphology, immunohistochemical staining, and growth characteristics of these cells demonstrate that they are consistent with the population of smooth muscle cells (SMCs). We examined the influence of a nitric oxide donor, sodium nitroprusside (SNP), on the regulation of human prostatic SMC proliferation. SNP exhibited a concentration-dependent (0.1–10 μm) inhibition of fetal calf serum-induced proliferation in human prostatic SMCs. In addition, growth-inhibitory responses to 8-bromo-cGMP (1–30 μm) were observed. However, the responses to SNP were significantly diminished by the presence of 1<i>H</i>-[1,2,4]oxadiazolo[4,3-<i>a</i>]quinoxalin-1-one (3 μm; a selective guanylate cyclase inhibitor). Furthermore, SNP induced an increased concentration-dependent accumulation of intracellular cGMP in human prostatic SMCs. After 48-hr period of deprivation of serum, cells were restimulated with serum to permit cell cycle progression. The addition of SNP (10 μm) at various times after the addition of serum to serum-deprived cells showed maximal inhibition of cell proliferation even when added 6 hr after the serum. This blocking effect of cell cycle progression was lost gradually as the delay from serum to SNP application increased from 6 to 18 hr. The membrane-associated protein kinase C (PKC) activity was studied in human prostatic SMCs; results showed that fetal calf serum (10%, v/v) significantly increased membrane-associated PKC activity. SNP (10 μm), which had little effect on basal kinase activity, completely abolished serum-induced augmentation of PKC activity. Therefore, we suggest that SNP mediates its antiproliferative effect by the inhibition of PKC activity on human prostatic SMCs; furthermore, its antiproliferative effect occurs at the early G₁ phase of the cell cycle." @default.
• W2431174548 created "2016-06-24" @default.
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• W2431174548 date "1998-03-01" @default.
• W2431174548 modified "2023-10-14" @default.
• W2431174548 title "Antiproliferative Effect in Human Prostatic Smooth Muscle Cells by Nitric Oxide Donor" @default.
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• W2431174548 doi "https://doi.org/10.1124/mol.53.3.467" @default.
• W2431174548 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9495813" @default.
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