Transforming growth factor beta1 mediates apoptotic activity of angiotensin II type I receptor blocker on prostate epithelium in vitro

The Prostate
Yayuan ZhaoJie Jin

Abstract

The significant association of benign prostatic hyperplasia (BPH) and hypertension indicates a common pathophysiological factor for both diseases. Hyperactivity of the renin-angiotensin system (RAS) has been reported in BPH. Angiotensin II type I (AT1) receptor is the principal mediator of the RAS, and the antagonist, AT1 receptor blocker (ARB), can induce apoptosis in prostate epithelium cells and increase transforming growth factor beta1 (TGF-beta1) expression. We aimed to investigate the mechanism of inhibition of AT1 receptor in prostate epithelium cells and the role of TGF-beta1. Human prostate epithelium cell lines were treated with different concentrations of ARB (losartan) (0, 0.1, 1, 10, 100, and 1,000 microM) for 24-72 hr. Cell proliferation was analyzed by cell proliferation assay. The location of AT1 receptor was shown by immunocytohistochemistry and immunocytofluorescence study. Analysis of apoptosis was by use of terminal transferase TdT-mediated dUTP-biotin end labeling (TUNEL) and caspase 3/7 activity assay. Mitochondrial outer-membrane permeabilization was measured by JC-1 staining. The level of TGF-beta1 was determined by enzyme-linked immunosorbent assay. Immunohistochemistry and immunofluorescence analysis s...Continue Reading

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Citations

Feb 22, 2011·The Journal of Urology·Gary G Schwartz
Aug 30, 2011·Molecular and Cellular Endocrinology·Karel De Gendt, Guido Verhoeven
Aug 17, 2016·International Journal of Molecular Sciences·Letteria MinutoliAntonio Micali

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis