1995•PathophysiologyOpen access

Alterations in tissue concentration and gene expression of adrenomedullin in spontaneously hypertensive rats

Toru Shimokubo, Junichiro Sakata, Kazuo Kitamura, Kenji Kangawa, Hisayuki Matsuo, Tanenao Eto

Abstract

In order to elucidate the role of adrenomedullin in hypertension, we have compared concentrations of immunoreactive rat adrenomedullin and adrenomedullin messenger RNA levels in tissues of 8-week-old spontaneously hypertensive rats (SHR) with those of age-matched Wistar-Kyoto rats (WKY). The adrenomedullin immunoreactivity concentrations in adrenal gland and cardiac atrium were significantly higher in SHR than in WKY. The adrenomedullin content of cardiac ventricle was also significantly higher in SHR than in WKY. The rat adrenomedullin messenger RNA levels in adrenal gland and heart of SHR were also higher than those of WKY. These results suggest that adrenomedullin participates in the mechanism to counteract the blood pressure elevation in SHR.

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Available abstract

Key concepts: Adrenomedullin, Internal medicine, Endocrinology, Ventricle, Messenger RNA, Spontaneously hypertensive rat, Adrenal gland, Medicine