Gonocytes
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Testicular development of the Mongolian gerbil : postnatal differentiation of germ and Leydig cells / Desenvolvimento testicular no gerbilo da Mongolia : diferenciação pos-natal das celulas germinativas e de Leydig
O gerbilo da Mongólia (Meriones unguiculatus) tem sido utilizado de maneira crescente em estudos sobre o sistema genital masculino. Alguns aspectos da espermatogênese e o ciclo do epitélio seminífero dessa espécie são conhecidos, mas investigações sobre o desenvolvimento pós-natal do testículo e diferenciação das suas principais populações celu
Publicado em: 2009
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2. Estrogens and male reproduction: a new concept
The mammalian testis serves two main functions: production of spermatozoa and synthesis of steroids; among them estrogens are the end products obtained from the irreversible transformation of androgens by a microsomal enzymatic complex named aromatase. The aromatase is encoded by a single gene (cyp19) in humans which contains 18 exons, 9 of them being transl
Brazilian Journal of Medical and Biological Research. Publicado em: 2007-06
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3. Male germ-line stem cell potential is predicted by morphology of cells in neonatal rat testes
Gonocytes are a transient population of male germ-line stem cells that are derived from primordial germ cells in the embryo and give rise to spermatogonial stem cells, which establish and maintain spermatogenesis in the postnatal testis. In contrast to spermatogonial stem cells, gonocytes can be identified easily in neonatal rat testis cell suspensions based
The National Academy of Sciences.
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4. Estrogen Promotes Germ Cell and Seminiferous Tubule Development in the Baboon Fetal Testis1
The foundation for development of the male reproduction system occurs in utero, but relatively little is known about the regulation of primate fetal testis maturation. Our laboratories have shown that estrogen regulates key aspects of the physiology of pregnancy and fetal development. Therefore, in the present study, we characterized and quantified germ cell
Society for the Study of Reproduction.
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5. Meiotic and epigenetic defects in Dnmt3L-knockout mouse spermatogenesis
The production of mature germ cells capable of generating totipotent zygotes is a highly specialized and sexually dimorphic process. The transition from diploid primordial germ cell to haploid spermatozoa requires genome-wide reprogramming of DNA methylation, stage- and testis-specific gene expression, mitotic and meiotic division, and the histone–protamin
National Academy of Sciences.
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6. Germ line-specific expression of intracisternal A-particle retrotransposons in transgenic mice.
Intracisternal A-particle (IAP) sequences are endogenous retrovirus-like mobile elements, or retrotransposons, present at 1,000 copies in the mouse genome. These elements transpose in a replicative manner via an RNA intermediate and its reverse transcription, and their transposition should therefore be tightly controlled by their transcription level. To anal