ECB-ART-52337
Dev Growth Differ
1981 Jan 01;236:565-569. doi: 10.1111/j.1440-169X.1981.00565.x.
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Effect of 17β-Estradiol on Growth of Oocytes in Cultured Ovarian Fragments of the Starfish, Asterina Pectinifera.
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The development of growing oocytes of the starfish, Asterina pectinifera, was divided into five stages according to their histological features. Specimens collected monthly from Rishiri Island throughout a year were used. The effect of 17 β-estradiol on oocyte growth was investigated. When ovarian fragments taken from April females were cultured in artificial seawater containing Medium 199 and streptomycin sulfate for 3 days, oocytes within such fragments did not show any changes in diameter. However, when similar ovarian fragments were cultured in the presence of 10-5 M 17 β-estradiol, the oocyte diameters increased significantly. It is concluded that 17 β-estradiol enhances the growth of starfish oocytes in cultured ovarian pieces.
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