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  • Title: Effects of cell storage and passage on basal and oxytocin-regulated prostaglandin secretion by equine endometrial epithelial and stromal cells.
    Author: Szóstek AZ, Siemieniuch MJ, Galvão AM, Lukasik K, Zieba D, Ferreira-Dias GM, Skarzynski DJ.
    Journal: Theriogenology; 2012 May; 77(8):1698-708. PubMed ID: 22357062.
    Abstract:
    Cell cultures are useful for determining the responses of specific cell types to various factors under controlled conditions and for obtaining a better understanding of in vivo physiologic processes. The aims of the present study were (i) to establish methodologies for isolation, culture and cryopreservation of equine endometrial epithelial and stromal cells; and (ii) to determine the effect of passage and cryopreservation on endometrial cell physiology, based on their basal and oxytocin (OT)-stimulated prostaglandin (PG) release. Epithelial and stromal cells were obtained by enzymatic digestion of equine endometrium collected from Days 2-5 of the estrous cycle (n = 16). Primary epithelial and stromal cells, as well as cryopreserved cells were stimulated with OT (10(-7)m) for 24 h. The concentrations of PGE(2) and PGF(2α) in the culture medium were measured by enzyme-linked immunosorbent assay (EIA). Oxytocin increased PGE(2) and PGF(2α) release by primary cultures of unfrozen epithelial cells until passage I (P < 0.01) and by the primary culture of unfrozen and cryopreserved/thawed stromal cells until passage IV (P < 0.01). Cryopreserved/thawed stromal cells cultured up to passage IV and unfrozen epithelial cells derived from passage I have physiological properties similar to those observed in primary culture and may be successfully used for in vitro studies of PG secretion.
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