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Endocrinology, Vol 113, 2302-2304, Copyright © 1983 by Endocrine Society
ARTICLES |
RJ Rodgers, JD O'Shea, JK Findlay, AP Flint and EL Sheldrick
To determine the cellular origin of oxytocin produced by the cyclical corpus luteum (CL) of the sheep, enriched fractions of enzymatically dispersed small and large luteal cells from 12 CL were prepared on a Ficoll 400 gradient. Oxytocin was measured by RIA. Large luteal cells contained 1.08 +/- (SD) 0.70 fg/cell oxytocin, which was congruent to 30 X the content of small luteal cells. Endothelial cells contained little if any oxytocin. During a 12-h incubation, large luteal cells produced 0.28 fg/cell.h oxytocin: small luteal cells did not produce measurable amounts of oxytocin. It is concluded that the large luteal cells are the source of the oxytocin produced by the CL of the sheep.
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