Central and peripheral irisin differentially regulate blood pressure.

Abstract:

INTRODUCTION:Irisin is a newly identified 112 amino acid hormone, derived as a product of fibronectin type III domain containing 5 (FNDC5), which is highly related to metabolic activity in skeletal muscle and brown fat. The effects of irisin on cardiovascular functions are unknown. PURPOSE:To explore the effects of central and peripheral irisin on cardiovascular functions. METHODS:Irisin was either administrated into 3rd ventricle of rats or intravenously, and its effects on blood pressure and cardiac contractibility measured. RESULTS:Administration of recombinant human irisin into the 3rd brain ventricle of rats activated neurons in the paraventricular nuclei of the hypothalamus. Central administration of irisin increased blood pressure and cardiac contractibility. Exogenous irisin reversed atenolol-induced inhibition of cardiac contractibility. In contrast, peripheral administration of irisin reduced blood pressure in both control and spontaneously hypertensive rats. Irisin dilated mesenteric artery rings through ATP-sensitive potassium channels. CONCLUSION:Our studies indicate that central and peripheral irisin may differentially regulate cardiovascular activities.

journal_name

Cardiovasc Drugs Ther

authors

Zhang W,Chang L,Zhang C,Zhang R,Li Z,Chai B,Li J,Chen E,Mulholland M

doi

10.1007/s10557-015-6580-y

subject

Has Abstract

pub_date

2015-04-01 00:00:00

pages

121-7

issue

2

eissn

0920-3206

issn

1573-7241

journal_volume

29

pub_type

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