Human Reproduction, Vol. 15, No. 2, 293-301,
February 2000
© 2000 European Society of Human Reproduction and Embryology
Isolation, characterization and long-term culture of human myometrial microvascular endothelial cells
Monash University Department of Obstetrics & Gynaecology, Monash Medical Centre, 246 Clayton Road, Clayton, Victoria 3168, Australia
Angiogenesis, defined as the growth of new vessels from pre-existing vessels, involves microvascular rather than large vessel endothelial cells. Accordingly, microvascular endothelial cell (MEC) proliferation assays are an appropriate in-vitro model of angiogenesis. We have developed a method for the isolation and long-term culture of large numbers of MEC from the human myometrium, tissue readily available from hysterectomy specimens. Human myometrial MEC were positively selected from tissue dissociated sequentially with collagenase and trypsin using Ulex europeaus antigen-1 (UEA)-coated dynabeads. Cultured myometrial MEC displayed characteristic endothelial phenotype and function for up to 14 passages: cobblestone morphology, formed capillary-like tubes on Matrigel, expressed CD31, Factor VIII-related antigen, bound UEA lectin, incorporated 1,1'-dioctadecyl-1,3,3,3',3'-tetramethylindocarbocyanine perchlorate-labelled acetylated low density lipoprotein, migrated and proliferated in response to basic fibroblast growth factor (bFGF) and vascular endothlelial growth factor (VEGF), but not epidermal growth factor. Optimal growth of human myometrial MEC occurred in a simple medium comprising M199, 5 ng/ml bFGF, 15% human serum, 5% fetal calf serum (FCS) and heparin. Human serum was essential for growth, although there was a synergistic effect when FCS was included. Almost identical dose–response curves were obtained for bFGF- and VEGF-induced myometrial MEC proliferation in early and late passage cells. Therefore myometrial MEC are a good model for in-vitro studies of uterine angiogenesis, since they have a stable phenotype and proliferative responsiveness to VEGF and bFGF for up to 14 passages.
Key words: angiogenesis/endothelial cell/microvascular/myometrium
1 To whom correspondence should be addressed
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