Ischemia and Enhancing Circulation

2001 Feb 13;103(6):897-903.
Augmentation of postnatal neovascularization with autologous bone marrow transplantation.
Shintani S, Murohara T, Ikeda H, Ueno T, Sasaki K, Duan J, Imaizumi T.

Cardiovascular Research Institute and the Department of Internal Medicine III, Kurume University
School of Medicine, Kurume, Japan.

BACKGROUND: Endothelial progenitor cells (EPCs) have been identified in adult human peripheral blood. Because circulating EPCs should originate from bone marrow (BM), we examined whether BM mononuclear cells (BM-MNCs) can give rise to functional EPCs and whether transplantation of autologous BM-MNCs might augment angiogenesis and collateral vessel formation in a rabbit model of hindlimb ischemia.

METHODS AND RESULTS: Rabbit BM-MNCs were isolated by centrifugation through a Histopaque density gradient and cultured on fibronectin. EPCs developed from BM-MNCs in vitro, as assessed by acetylated LDL incorporation, nitric oxide (NO) release, and expression of von Willebrand factor and lectin binding. Unilateral hindlimb ischemia was surgically induced in rabbits (n=8), and fluorescence-labeled autologous BM-MNCs were transplanted into the ischemic tissues. Two weeks ransplantation, fluorescence microscopy revealed that transplanted cells were incorporated into the capillary network among preserved skeletal myocytes. In contrast, transplanted autologous BM-fibroblasts did not participate in EC capillary network formation (n=5). Then, in an additional 27 rabbits, saline (control; n=8), autologous BM-MNCs (n=13; 6.9+/-2.2×10(6) cells/animal), or BMfibroblasts (n=6; 6.5+/-1.5×10(6) cells/animal) were injected into the ischemic tissues at postoperative day 7. Four weeks after transplantation, the BM-MNC-transplanted group had more angiographically detectable collateral vessels (angiographic score: 1.5+/-0.34 versus 0.94+/-0.26 and 1.1+/-0.14; P:

CONCLUSIONS: Direct local transplantation of autologous BM-MNCs seems to be a useful strategy for therapeutic neovascularization in ischemic tissues in adults, consistent with “therapeutic vasculogenesis.”

PMID: 11171801 [PubMed – indexed for MEDLINE]