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Elsevier Science

Life Sci. 1988;42(11):1117-22. doi: 10.1016/0024-3205(88)90605-4.

A dynorphin peptide induces hypotension by stimulating the release of atrial natriuretic peptide from rat atrium.

Life sciences

C W Xie, L Y Yin, X Z Xie, X M Gao, Z Q Xia, J K Chang, J Tang

Affiliations

  1. Laboratory of Cardiopulmonary Endocrinology, Beijing Medical University, China.

PMID: 2894603 DOI: 10.1016/0024-3205(88)90605-4

Abstract

Intravenous injection of dynorphin A-(1-10) amide (Dyn, 81-324 nmol/kg) induced a dose-dependent hypotensive effect in the rat. This effect was antagonized by pretreatment with immunoglobulin G, purified from a specific antiserum raised against alpha-human atrial natriuretic peptide (anti-hANP-IgG), as well as by high doses of naloxone (2 or 10 mg/kg). In addition, a 12-fold increase in plasma level of atrial natriuretic peptide-like immunoreactivity (ANP-IR) was found following Dyn administration, which was accompanied by a significant decrease of atrial ANP-IR. These results suggest that the stimulated release of ANP-IR from the atrium may constitute one of the mechanisms for the depressor effect of dynorphin peptides.

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