Angiotensin receptors couple to signal transduction pathways linked to cell proliferation. Increased expression of AT(1) has been reported in human prostate cancer tissue. The angiotensin II (A-II) receptor blocker (ARB), an antihypertensive agent, was shown to inhibit proliferation of prostate cancer cells through suppression of MAPK and STAT3 phosphorylation.53 Oral administration of ARB inhibited the growth of prostate cancer xerographs in both androgen-dependent and androgen-independent cells. Another report demonstrated a significant role for the A-II-AT1 receptor pathway in tumor angiogenesis and growth in vivo.54
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