title: Hypertension is positively associated with prostate cancer development in the TRAP transgenic rat model.
abstract: Epidemiological data on the relationship between hypertension and prostate cancer development are conflicting. To cast light on this question, we performed animal experiments using hybrid rats generated by crossing the spontaneously hypertensive rat (SHR) or its normotensive control Wistar Kyoto (WKY) rat with a transgenic rat for adenocarcinoma of prostate (TRAP) that features development of adenocarcinoma at high incidence by 15 weeks of age. The number of adenocarcinomatous foci in the lateral prostate of hypertensive (TRAP × SHR)F1 rats was demonstrated to be significantly increased compared with those of normotensive (TRAP × WKY)F1 rats. In the ventral prostate, increase of carcinoma foci was also observed but did not reach significance. The number of cancer foci showing microinvasion in (TRAP × SHR)F1 rats was higher than that of (TRAP × WKY)F1 rats, but again without significance, while treatment with prazosin, an anti-hypertensive agent, tended to decrease microinvasive carcinoma foci in both the ventral and lateral prostate. In conclusion, the present study provided additional evidence that high blood pressure is associated with prostate cancer risk.
authors.affiliation: Department of Experimental Pathology and Tumor Biology, Nagoya City University Graduate School of Medical Sciences, Mizuho-ku, Nagoya, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Takeshita
authors.forename: Satoru
authors.initials: S
authors.lastname: Takahashi
authors.forename: Mingxi
authors.initials: M
authors.lastname: Tang
authors.forename: Azman
authors.initials: A
authors.lastname: Seeni
authors.forename: Makoto
authors.initials: M
authors.lastname: Asamoto
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Shirai
mesh_terms: D000230:Adenocarcinoma / Q000150:complications*; D000818:Animals; D004195:Disease Models, Animal; D005260:Female; D006973:Hypertension / Q000150:complications*; D007150:Immunohistochemistry; D008297:Male; D011471:Prostatic Neoplasms / Q000150:complications*; D051381:Rats; D011918:Rats, Inbred SHR; D055647:Rats, Transgenic; D017208:Rats, Wistar