Open AccessImmuno‐modification of enhancing stem cells targeting for myocardial repair
Author(s) -
Yu Jiashing,
Wu YuanKun,
Gu Yiping,
Fang Qizhi,
Sievers Richard,
Ding ChunHua,
Olgin Jeffrey E,
Lee Randall J
Publication year - 2015
Publication title -
journal of cellular and molecular medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.44
H-Index - 130
eISSN - 1582-4934
pISSN - 1582-1838
DOI - 10.1111/jcmm.12439
Subject(s) - medicine , stem cell , myocardial infarction , cardiology , nerve conduction velocity , cd34 , optical mapping , ligation , progenitor cell , cardiac function curve , antibody , heart failure , immunology , biology , genetics
Despite the controversy in mechanism, rodent and clinical studies have demonstrated beneficial effects of stem/progenitor cell therapy after myocardial infarction ( MI ). In a rat ischaemic reperfusion MI model, we investigated the effects of immunomodification of CD 34 + cells on heart function and myocardial conduction. Bispecific antibody (BiAb), consisting of an anti‐myosin light chain antibody and anti‐ CD 45 antibody, injected intravenously was used to direct human CD 34 + cells to injured myocardium. Results were compared to echocardiography guided intramyocardial ( IM ) injection of CD 34 + cells and PBS injected intravenously. Treatment was administered 2 days post MI . Echocardiography was performed at 5 weeks and 3 months which demonstrated LV dilatation prevention and fractional shortening improvement in both the BiAb and IM injection approaches, with BiAb achieving better results. Histological analyses demonstrated a decrease in infarct size and increase in arteriogenesis in both BiAb and IM injection. Electrophysiological properties were studied 5 weeks after treatments by optical mapping. Conduction velocity ( CV ), action potential duration ( APD ) and rise time were significantly altered in the MI area. The BiAb treated group demonstrated a more normalized activation pattern of conduction and normalization of CV at shorter pacing cycle lengths. The ventricular tachycardia inducibility was lowest in the BiAb treatment group. Intravenous administration of BiAb offers an effective means of stem cell delivery for myocardial repair post‐acute MI . Such non‐invasive approach was shown to offer a distinct advantage to more invasive direct IM delivery.