Functional assessment of myoblast transplantation for cardiac repair with magnetic resonance imaging.


Journal Article

BACKGROUND: Contraction of transplanted myoblasts and their effects on function and remodeling after myocardial infarction remain controversial. AIM: We used magnetic resonance imaging (MRI) to study wall thickening and left ventricular (LV) function and geometry after myoblast transplantation. METHODS AND RESULTS: Three weeks after cryo-infarction rabbits were randomized to receive an injection of approximately 2 x 10(8) myoblasts (n=8) or medium (n=9) into the scar. Cine MRI and contrast enhanced (ce) MRI images were acquired before injection (baseline) and 4 weeks later (endpoint). Regional wall thickening was measured at the site of transmural hyperenhancement. In the control group, regional wall thickening decreased to -15.3+/-8.6% at baseline, which further decreased to -18.3+/-5.7% at endpoint. Further, end-diastolic volume increased from 3.96+/-0.27 to 5.00+/-0.46 ml and end-systolic volume from 2.23+/-0.19 to 2.96+/-0.30 ml (both P<0.05 vs. baseline), which was accompanied by increased LV wall volumes (P<0.05 vs. baseline). In contrast, myoblast transplantation increased regional wall thickening from -11.9+/-15.9% at baseline to 26.9+/-17.0% (P<0.05 vs. control), which resulted in significantly improved two-dimensional ejection fractions at the infarct level and prevented the increase in end-diastolic and end-systolic volumes and wall volume. CONCLUSION: Intracardiac myoblast transplantation after myocardial infarction improves regional wall thickening and prevents progressive left ventricular remodeling.

Full Text

Duke Authors

Cited Authors

  • van den Bos, EJ; Thompson, RB; Wagner, A; Mahrholdt, H; Morimoto, Y; Thomson, LEJ; Wang, LH; Duncker, DJ; Judd, RM; Taylor, DA

Published Date

  • June 2005

Published In

Volume / Issue

  • 7 / 4

Start / End Page

  • 435 - 443

PubMed ID

  • 15921777

Pubmed Central ID

  • 15921777

International Standard Serial Number (ISSN)

  • 1388-9842

Digital Object Identifier (DOI)

  • 10.1016/j.ejheart.2003.12.022


  • eng

Conference Location

  • England