Abstract
Endothelial cells have common as well as specialized roles in different tissues and organs; as such, the abundant endothelial cells in the corpus luteum (> 50% of total cell population) could have unique activities necessary for luteal function. Our objective was to establish a method for isolating a pure population of endothelial cells from the primate corpus luteum and to determine the basic conditions for in vitro culture. Corpora lutea collected from rhesus monkeys throughout the luteal phase of the menstrual cycle were minced and enzymatically dispersed into single cell suspensions. Endothelial cells were isolated from the remaining cells (i.e., steroidogenic, fibroblastic, etc.) utilizing magnetic beads labeled with a lectin, Ulex europaeus agglutinin-1 (UEA-1), which binds a sugar found only on primate endothelial cells. After exposure to a magnetic field, UEA-1-negative (-) cells were decanted from the pelleted UEA-1-positive (+) cells; to remove beads from the UEA-1 (+) cells, excess sugar was applied. After optimization of the bead-to-cell ratio, the UEA-1 (+) group contained a population of cells 8-12 microns in diameter (typical endothelial cell size) and < 1% steroidogenic cells. UEA-1 (-) cells were larger (15-35 ...Continue Reading
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