RRC ID 192
Author Tambara K, Premaratne GU, Sakaguchi G, Kanemitsu N, Lin X, Nakajima H, Sakakibara Y, Kimura Y, Yamamoto M, Tabata Y, Ikeda T, Komeda M.
Title Administration of control-released hepatocyte growth factor enhances the efficacy of skeletal myoblast transplantation in rat infarcted hearts by greatly increasing both quantity and quality of the graft.
Journal Circulation
Abstract BACKGROUND:We investigated whether simultaneous administration of control-released hepatocyte growth factor (HGF) enhances the efficacy of skeletal myoblast (SM) transplantation (Tx) through its antiapoptotic, angiogenic, and antifibrotic effects in myocardial infarction (MI).
METHODS AND RESULTS:Forty-eight Lewis rats with chronic MI were divided into 4 groups. In Group I (n=14), neonatal SMs (5 x 10(6)) were transplanted in the MI area with a gelatin sheet incorporating 40 microg (1 g/L) of HGF applied. Group II (n=14) had SM Tx and placement of a saline sheet. Groups III (n=10) and IV (n=10) had culture medium injection plus HGF and saline sheet application, respectively. Four rats each from Groups I and II were sacrificed at day 1 for TUNEL assay on donor SMs. The percentage of TUNEL-positive donor cells was much lower in Group I than in Group II (P<0.05). At 4 weeks, in Group I, left ventricular diastolic dimension was smallest in echocardiography, end-systolic elastance was highest, and tau was the lowest (both P<0.0005 in ANOVA) in cardiac catheterization. Vascular density inside the graft was higher in Group I than in Group II (P<0.0001). The percentage of fibrotic area inside the graft was smaller in Group I than in Group II (P<0.001). The graft volume as estimated by fast skeletal myosin heavy chain-positive areas was approximately 7-fold larger in Group I than in Group II (P<0.0001).
CONCLUSIONS:In SM Tx, HGF can greatly increase the graft volume and vascularity and reduce fibrosis inside the graft, which enhances the efficacy of SM Tx to infarcted hearts.
Volume 112(9 Suppl)
Pages I129-34
Published 2005-8-30
DOI 10.1161/CIRCULATIONAHA.104.526293
PII 112/9_suppl/I-129
PMID 16159804
MeSH Animals Animals, Newborn Apoptosis Cattle Delayed-Action Preparations Drug Implants Fibrosis Gelatin Graft Enhancement, Immunologic Hepatocyte Growth Factor / administration & dosage Hepatocyte Growth Factor / therapeutic use* Hydrogels Male Muscle, Skeletal / cytology Myoblasts / transplantation* Myocardial Infarction / diagnostic imaging Myocardial Infarction / drug therapy Myocardial Infarction / pathology Myocardial Infarction / surgery* Organ Size Rats Rats, Inbred Lew Recombinant Proteins / administration & dosage Recombinant Proteins / therapeutic use Ultrasonography Ventricular Function, Left
IF 23.603
Times Cited 51