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- W2011939123 abstract "The aim of the present study is the isolation of subpopulations of steroid-producing cells in the ovary of the newly hatched chicken. Cells were obtained by fractional trypsin dissociation of the ovary and isopycnic separation in a continuous metrizamide gradient (0-30%). Testosterone and 17 beta-estradiol secretion was measured by radioimmunoassay in the incubation medium of the isolated cells. Six fractions of ovarian cells were studied. Fraction II (density 1.080) contained typical steroidogenic cells with a positive reaction for 3 beta-hydroxysteroid dehydrogenase, delta 5-isomerase. This fraction secreted testosterone (3.7 ng/10(6) cells/2 hr) but no 17 beta-estradiol secretion was detectable. The majority (85%) of cells obtained in fraction VI (density 1.150) were relatively undifferentiated and contained polyribosomes, mitochondria with lamellar cristae, and few rough endoplasmic reticulum; only 3-5% of the cells of this fraction were similar to those of fraction II. In fraction VI the highest level of 17 beta-estradiol secretion was found (2.9 ng/10(6) cells/2 hr) whereas testosterone was at a minimum level (0.06 ng/10(6) cells/2 hr). Results strongly suggest the existence of two cell subpopulations in the inmature chicken ovary: typical steroidogenic and poorly differentiated cells which secrete testosterone and 17 beta-estradiol, respectively." @default.
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- W2011939123 date "1988-07-01" @default.
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- W2011939123 title "Identification of steroidogenic cell subpopulations in the ovary of the newly hatched chicken" @default.
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- W2011939123 doi "https://doi.org/10.1016/0016-6480(88)90306-1" @default.
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