Ovotestis
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Reversão sexual de rã-touro (Rana catesbeiana) com hormônio masculinizante misturado à ração de girinos
Este trabalho consistiu em testar a eficiência de um hormônio masculinizante (17beta-hidróxi-17-metil-andróxi-4-en-3-ona) na reversão sexual de girinos de rã-touro (Rana catesbeiana). Foram usados 352 girinos com dois a três meses de idade, nos estádios 30 a 36, para testar quatro níveis de hormônio na ração (0, 30, 60 e 90 mig/g) por 45 dias. Ap
Revista Brasileira de Zootecnia. Publicado em: 2001-06
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14. Morfologia do sistema muscular e do sistema reprodutor de Anisancylus obliquus (Broderip & Sowerby) do Chile, como contribuição à sistemática de Ancylidae (Gastropoda, Pulmonata, Basommatophora)
A study on the morphology of the muscular and reproductive systems of Anisancylus obliquus (Broderip & Sowerby, 1832) based on specimens from Chile is presented. Differences are observed in the number of folicules of the ovotestis and prostata when comparing them with specimens from Brazil (chilean specimens: ovotestis = 28 to 32; prostata = 3 to 5; brazilia
Revista Brasileira de Zoologia. Publicado em: 2000-12
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15. Unusual dual genital duct remnants in true hermaphroditism.
A case of true hermaphroditism is reported in which a 46,XY karyotype was associated with a testis and an ovotestis. The dual presence of a Fallopian tube and a vas deferens on the side of the ovotestis is documented as a previously unreported finding.
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16. Primary structure of a molluscan egg-specific NADase, a second-messenger enzyme.
An egg-specific NADase has been purified from the ovotestis of the marine mollusk Aplysia californica. The enzyme converts NAD to cyclic ADP-ribose (cADPR), which is a potent mobilizer of Ca2+. It is likely that the NADase serves to raise Ca2+ levels in the ova at appropriate times. A 1.2-kb cDNA clone containing the complete coding sequence of the native NA
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17. BRCA1 and BRCA2 protein expressions in an ovotestis of a 46, XX true hermaphrodite
BRCA1 and BRCA2 breast cancer susceptibility genes encode proteins, the normal cellular functions of which are complex and multiple, and germ-line mutations in individuals predispose both to breast and to ovarian cancer. There is nevertheless substantial evidence linking BRCA1 and BRCA2 to homologous recombination and DNA repair, to transcriptional control a
BioMed Central.
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18. Purification and characterization of a molluscan egg-specific NADase, a second-messenger enzyme.
An egg-specific NADase has been purified to homogeneity from the ovotestis of the opisthobranch mollusk Aplysia californica. Unlike other NADases, the Aplysia enzyme generates primarily cyclic-ADP-ribose (cADPR) rather than ADP-ribose from NAD. cADPR has been shown to stimulate the release of Ca2+ from microsomes prepared from sea urchin egg and, when inject
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19. A relative of the catalytic subunit of cyclic AMP-dependent protein kinase in Aplysia spermatozoa.
Transcripts encoding CAPL-B, an apparent member of the cyclic-nucleotide-regulated kinase subfamily in Aplysia californica, are found exclusively in the ovotestis and are concentrated in meiotic and postmeiotic spermatogenic cells. The CAPL-B polypeptide is present in mature spermatozoa, suggesting that the kinase plays a part in regulating events associated
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20. Unilateral true hermaphrodite with 46,XX/46,XY dispermic chimerism.
A 13 year old female presented with ambiguous external genitalia, right inguinal ovotestis, left ovary, apparently normal Mullerian system, and absent Wolffian system. Cultured lymphocytes showed a 46,XX/46,XY karyotype. Histopathology of the gonads confirmed true hermaphroditism. The presence of two genetically different erythrocyte populations was observed
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21. ADP-ribosyl cyclase: an enzyme that cyclizes NAD+ into a calcium-mobilizing metabolite.
Cyclic ADP-ribose (cADPR) is a metabolite of NAD+ that is as active as inositol trisphosphate (IP3) in mobilizing intracellular Ca2+ in sea urchin eggs. The activity of the enzyme responsible for synthesizing cADPR is found not only in sea urchin eggs but also in various mammalian tissue extracts, suggesting that cADPR may be a general messenger for Ca2+ mob