Exogenous midkine administration prevents cardiac remodeling in pacing-induced congestive heart failure of rabbits

Masahide Harada, Mayumi Hojo, Kaichiro Kamiya, Kenji Kadomatsu, Toyoaki Murohara, Itsuo Kodama, Mitsuru Horiba

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Midkine (MK), a heparin-binding growth factor, has been shown to prevent cardiac remodeling after ischemic injury through its anti-apoptotic effect. Cell apoptosis is central to the pathophysiology of cardiac remodeling in congestive heart failure (CHF) of ischemic as well as non-ischemic origin. We hypothesized that MK exerts the anti-apoptotic cardioprotective effect in CHF of non-ischemic etiology. MK protein or vehicle (normal saline) was subcutaneously administered in tachycardia-induced CHF rabbits (right ventricular pacing, 350 beats/min, 4 weeks). The vehicle-treated rabbits (n = 19, control) demonstrated severe CHF and high mortality rate, whereas MK (n = 16) demonstrated a well-compensated state and a lower mortality rate. In echocardiography, left ventricular (LV) end-diastolic dimension decreased in MK versus control, whereas LV systolic function increased. In histological analysis (picrosirius red staining), MK decreased collagen deposition area compared with control. TUNEL staining showed that MK prevented cell apoptosis and minimized myocyte loss in the CHF rabbit ventricle, associated with activation of PI3-K/Akt signaling, producing a parallel decrease of Bax/Bcl-2 ratio. MK prevented progression of cardiac remodeling in the CHF rabbit, likely by activation of anti-apoptotic signaling. Exogenous MK application might be a novel therapeutic strategy for CHF due to non-ischemic origin.

Original languageEnglish
Pages (from-to)96-104
Number of pages9
JournalHeart and Vessels
Volume31
Issue number1
DOIs
Publication statusPublished - 01-01-2016

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine

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