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- W2000765331 abstract "Smooth muscle (SM), a major component of prostate stroma, plays an important role in the pathogenesis of benign prostatic hyperplasia. In many muscle systems, steroid hormones and alpha(1)-adrenergic neurotransmitters tightly regulate expression of contractile proteins. In this study, SM content and the expression of myosin heavy chain (MHC) in tissues from patients with benign prostatic hyperplasia treated with androgen ablation or alpha-blockade were compared with untreated controls.Prostatic periurethral tissue specimens from patients receiving luteinizing hormone-releasing hormone analogues (n = 12), alpha-blocking agents (n = 12), and no treatment (n = 13) were examined. The samples were analyzed for SM MHC mRNA expression using competitive reverse transcription-polymerase chain reaction. SM content was measured by morphometric analysis of trichrome-stained sections.Stromal SM constituted 45.4% +/- 8.6%, 48.1% +/- 18.4%, and 45.9% +/- 10.8% of the total tissue in androgen ablated, alpha-blocked, and untreated tissues, respectively. No significant difference was observed among these three groups (P = 0.84, analysis of variance). However, SM MHC mRNA expression was markedly decreased in the alpha-blockade group (0.15 +/- 0.02 attomole/mg tissue) compared with the androgen-ablated (0.58 +/- 0.15 attomole/mg tissue) or control (0.44 +/- 0.10 attomole/mg tissue) groups. The relationship between SM content and expression of SM MHC significantly differed among the groups (P = 0.02, analysis of variance).Androgen ablation and alpha-blockade do not appear to alter the histologic characteristics of prostate stroma in men with symptomatic benign prostatic hyperplasia. However, contractile protein gene expression in stromal SM cells is significantly altered after alpha-blockade. These data suggest that, in addition to the simple relaxation of muscle tone, alpha-blocking agents may affect the phenotypic expression of contractile proteins in prostate SM cells." @default.
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- W2000765331 date "2001-01-01" @default.
- W2000765331 modified "2023-10-14" @default.
- W2000765331 title "Alpha-blockade downregulates myosin heavy chain gene expression in human benign prostatic hyperplasia" @default.
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- W2000765331 doi "https://doi.org/10.1016/s0090-4295(00)00842-6" @default.
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