Origins of circulating endothelial cells and endothelial outgrowth from blood.
J Clin Invest
; 105(1): 71-7, 2000 Jan.
Article
en En
| MEDLINE
| ID: mdl-10619863
Normal adults have a small number of circulating endothelial cells (CEC) in peripheral blood, and endothelial outgrowth has been observed from cultures of blood. In this study we seek insight into the origins of CEC and endothelial outgrowth from cultures of blood. Fluorescence in situ hybridization analysis of blood samples from bone marrow transplant recipients who had received gender-mismatched transplants 5-20 months earlier showed that most CEC in fresh blood had recipient genotype. Endothelial outgrowth from the same blood samples after 9 days in culture (5-fold expansion) was still predominantly of the recipient genotype. In contrast, endothelial outgrowth after approximately 1 month (102-fold expansion) was mostly of donor genotype. Thus, recipient-genotype endothelial cells expanded only approximately 20-fold over this period, whereas donor-genotype endothelial cells expanded approximately 1000-fold. These data suggest that most CEC in fresh blood originate from vessel walls and have limited growth capability. Conversely, the data indicate that outgrowth of endothelial cells from cultures of blood is mostly derived from transplantable marrow-derived cells. Because these cells have more delayed outgrowth but a greater proliferative rate, our data suggest that they are derived from circulating angioblasts.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Células Madre
/
Endotelio Vascular
Límite:
Adult
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
J Clin Invest
Año:
2000
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Estados Unidos