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Endocrinology, Vol 106, 1424-1429, Copyright © 1980 by Endocrine Society
ARTICLES |
AH Payne, JR Downing and KL Wong
Dispersed cells from whole testes or from isolated interstitial tissue of mature rats, yielded two distinct populations of Leydig cells when subjected to centrifugation in a 0-40% metrizamide gradient. One population (I) was found in a fractions with a density of 1.085-1.117 g/cm3, and the other population (II) was found in fractions with a density of 1.128-1.145 g/cm3. Binding of 125I-labeled hCG by each population of cells indicated a single class of binding sites with the same high binding affinity and similar concentrations of binding sites per Leydig cell. Testosterone production per fmol gonadotropin receptor site in the absence of gonadotropin stimulation was similar for cells of each population. However, when cells from each population were incubated with increasing concentrations of hCG or dibutyryl cAMP, only Leydig cells from population II exhibited a marked increase in testosterone production. The low responsiveness of Leydig cells in population I did not appear to be a result of either damage to these cells or inhibition by non-Leydig interstitial cells in population I.
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G.-M. Wang, R.-S. Ge, S. A. Latif, D. J. Morris, and M. P. Hardy Expression of 11{beta}-Hydroxylase in Rat Leydig Cells Endocrinology, February 1, 2002; 143(2): 621 - 626. [Abstract] [Full Text] [PDF] |
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H.-B. Gao, M.-H. Tong, Y.-Q. Hu, Q.-S. Guo, R. Ge, and M. P. Hardy Glucocorticoid Induces Apoptosis in Rat Leydig Cells Endocrinology, January 1, 2002; 143(1): 130 - 138. [Abstract] [Full Text] [PDF] |
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P. Syntin, H. Chen, B. R. Zirkin, and B. Robaire Gene Expression in Brown Norway Rat Leydig Cells: Effects of Age and of Age-Related Germ Cell Loss Endocrinology, December 1, 2001; 142(12): 5277 - 5285. [Abstract] [Full Text] [PDF] |
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D. A. Redmer, V. Doraiswamy, B. J. Bortnem, K. Fisher, A. Jablonka-Shariff, A. T. Grazul-Bilska, and L. P. Reynolds Evidence for a Role of Capillary Pericytes in Vascular Growth of the Developing Ovine Corpus Luteum Biol Reprod, September 1, 2001; 65(3): 879 - 889. [Abstract] [Full Text] [PDF] |
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D. O. Hardy, R.-S. Ge, J. F. Catterall, Y.-t. Hou, T. M. Penning, and M. P. Hardy Identification of the Oxidative 3{alpha}-Hydroxysteroid Dehydrogenase Activity of Rat Leydig Cells as Type II Retinol Dehydrogenase Endocrinology, May 1, 2000; 141(5): 1608 - 1617. [Abstract] [Full Text] [PDF] |
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J.-M. Kim, L. Luo, and B. R. Zirkin Caspase-3 Activation Is Required for Leydig Cell Apoptosis Induced by Ethane Dimethanesulfonate Endocrinology, May 1, 2000; 141(5): 1846 - 1853. [Abstract] [Full Text] [PDF] |
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E. Reaven, L. Zhan, A. Nomoto, S. Leers-Sucheta, and S. Azhar Expression and microvillar localization of scavenger receptor class B, type I (SR-BI) and selective cholesteryl ester uptake in Leydig cells from rat testis J. Lipid Res., March 1, 2000; 41(3): 343 - 356. [Abstract] [Full Text] |
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B. T. Akingbemi, R.-S. Ge, G. R. Klinefelter, G. L. Gunsalus, and M. P. Hardy A Metabolite of Methoxychlor, 2,2-Bis(p-Hydroxyphenyl)-1,1,1-Trichloroethane, Reduces Testosterone Biosynthesis in Rat Leydig Cells Through Suppression of Steady-State Messenger Ribonucleic Acid Levels of the Cholesterol Side-Chain Cleavage Enzyme Biol Reprod, March 1, 2000; 62(3): 571 - 578. [Abstract] [Full Text] |
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M. M. Lee, C. C. Seah, P. T. Masiakos, C. M. Sottas, F. I. Preffer, P. K. Donahoe, D. T. MacLaughlin, and M. P. Hardy Mullerian-Inhibiting Substance Type II Receptor Expression and Function in Purified Rat Leydig Cells Endocrinology, June 1, 1999; 140(6): 2819 - 2827. [Abstract] [Full Text] |
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R.-S. Ge, D. O. Hardy, J. F. Catterall, and M. P. Hardy Opposing Changes in 3{alpha}-Hydroxysteroid Dehydrogenase Oxidative and Reductive Activities in Rat Leydig Cells during Pubertal Development Biol Reprod, April 1, 1999; 60(4): 855 - 860. [Abstract] [Full Text] |
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W. Tourtellotte, R Nagarajan, A Auyeung, C Mueller, and J Milbrandt Infertility associated with incomplete spermatogenic arrest and oligozoospermia in Egr4-deficient mice Development, January 11, 1999; 126(22): 5061 - 5071. [Abstract] [PDF] |
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R.-S. Ge and M. P. Hardy Variation in the End Products of Androgen Biosynthesis and Metabolism during Postnatal Differentiation of Rat Leydig Cells Endocrinology, September 1, 1998; 139(9): 3787 - 3795. [Abstract] [Full Text] [PDF] |
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T. Lin, J. Hu, D. Wang, and D. M. Stocco Interferon-{gamma} Inhibits the Steroidogenic Acute Regulatory Protein Messenger Ribonucleic Acid Expression and Protein Levels in Primary Cultures of Rat Leydig Cells Endocrinology, May 1, 1998; 139(5): 2217 - 2222. [Abstract] [Full Text] [PDF] |
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R.-S. Ge, D. O. Hardy, J. F. Catterall, and M. P. Hardy Developmental Changes in Glucocorticoid Receptor and 11{beta}-Hydroxysteroid Dehydrogenase Oxidative and Reductive Activities in Rat Leydig Cells Endocrinology, December 1, 1997; 138(12): 5089 - 5095. [Abstract] [Full Text] [PDF] |
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R.-s. Ge and M. P. Hardy Decreased Cyclin A2 and Increased Cyclin G1 Levels Coincide with Loss of Proliferative Capacity in Rat Leydig Cells During Pubertal Development Endocrinology, September 1, 1997; 138(9): 3719 - 3726. [Abstract] [Full Text] [PDF] |
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R.-S. Ge, H.-B. Gao, V. L. Nacharaju, G. L. Gunsalus, and M. P. Hardy Identification of a Kinetically Distinct Activity of 11{beta}-Hydroxysteroid Dehydrogenase in Rat Leydig Cells Endocrinology, June 1, 1997; 138(6): 2435 - 2442. [Abstract] [Full Text] [PDF] |
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H.-B. Gao, R.-S. Ge, V. Lakshmi, A. Marandici, and M. P. Hardy Hormonal Regulation of Oxidative and Reductive Activities of 11{beta}-Hydroxysteroid Dehydrogenase in Rat Leydig Cells Endocrinology, January 1, 1997; 138(1): 156 - 161. [Abstract] [Full Text] [PDF] |
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