Differentiation of cryopreserved bone marrow-derived mononuclear cells into endothelial progenitor cells
10.3724/SP.J.1008.2009.01225
- Author:
Jian-Guo WU
1
Author Information
1. Department of General Surgery
- Publication Type:Journal Article
- Keywords:
Cell differentiation;
Cryopreservation;
Endothelial progenitor cells;
Mononuclear cells
- From:
Academic Journal of Second Military Medical University
2010;30(11):1225-1229
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To compare the functions of endothelial progenitor cells (EPCs) differentiated from cryopreserved and fresh bone marrow-derived mononuclear cells (MNCs). Methods: The bone marrow samples were taken from swine iliac bones. The isolated MNCs were cultured or cryopreserved at -80°C for 3 months and then cultured again. The P1-EPCs were identifed by Dil-ac-LDL and FITC-UEA-1 double staining, immunohistochemistry and flow cytometry. The EPC pick-up rate, migration, adhesion, and proliferation abilities were compared between the cryopreserved group and the fresh group. Results: Immunohistochemisty showed that the P1-EPCs of the cryopreserved group were positive for CD133 (+), CD34 (+), CD31 (++) and KDR (++); flow cytometry also showed they were positive for CD133 ([17.24 ± 3.12]%), CD34 ([37.21 ± 10.85]%), CD31 ([72.07±13.34]%) and KDR ([89.09±16.40]%). There were no significant differences in the pick-up rates ([1.1±0.078]% vs [1.03±0.061]%, P = 0.054), migration rates ([15±0.71]% vs [14.2±0.63]%, P = 0.17), adherence rates ([42.7±2.1]% vs [39.5±1.7]%, P = 0.11), and proliferation abilities ([25.06±2.82] × 104 vs [21.64± 2.34]×104, P = 0.089) between EPCs of the fresh and cryopreserved groups. Conclusion: Cryopreservation has no measurable influence on the numbers and functions of EPCs differentiated from bone marrow-derived MNCs, so cryopreservation can be used to obtain sufficient homogeneous EPCs in a short period for therapy using EPCs transplantation.
