Spermatogenesis

Absence of the exon 1 coding sequence of the androgen receptor gene associated with teratozoospermia in a Brazilian population

W. E. J. C. Mesquita, Approbato, M. S., Moura, K. K. V. O., and Jesuíno, R. S. A., Absence of the exon 1 coding sequence of the androgen receptor gene associated with teratozoospermia in a Brazilian population, vol. 8. pp. 1423-1426, 2009.

The androgen receptor (AR) is a protein encoded by the AR gene, which when mutated may affect spermatogenesis, the process in which spermatozoa are produced; thus, AR mutations could lead to male infertility. We examined exon 1 of the AR gene in men with idiopathic infertility. Blood or semen samples from 111 infertile, oligozoospermic (N = 31), asthenozoospermic (N = 23), teratozoospermic (N = 33), and azoospermic (N = 24) men were analyzed. The extracted DNA was amplified for the exon 1 region of the AR gene.

Meiosis, spermatogenesis and nucleolar behavior in the seminiferous tubules of Alydidae, Coreidae and Rhopalidae (Heteroptera) species

H. V. Souza, Souza, F. B., Maruyama, S. R. C., Castanhole, M. M. U., and Itoyama, M. M., Meiosis, spermatogenesis and nucleolar behavior in the seminiferous tubules of Alydidae, Coreidae and Rhopalidae (Heteroptera) species, vol. 8, pp. 1383-1396, 2009.

We studied the karyotype, spermatogenesis and nucleolar activity at spermatogenesis in five species of Heteropera: Hyalymenus sp and Neomegalotomus pallescens, Alydidae; Catorhintha guttula and Hypselonotus fulvus, Coreidae; and Niesthrea sidae, Rhopalidae. They showed a red (Alydidae) or orange (Coreidae and Rhopalidae) membrane covering the testes, which consisted of seven testicular lobes, except in N. pallescens, which had only five.

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