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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
16/10/2002 |
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Data da última atualização: |
16/10/2002 |
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Autoria: |
LUN, S.; SMITH, P.; LUNDY, T.; O'CONNELL, A.; HUDSON, N.; McNATTY, K. P. |
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Título: |
Steroid contents of and steroidogenesis in vitro by the developing gonad and mesonephros around sexual differentiation in fetal sheep. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Journal of Reproduction and Fertility, v. 114, n. 1, p. 131-139, 1998. |
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Idioma: |
Inglês |
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Conteúdo: |
The aim of the present study was to establish whether the steroids, progesterone, androstenedione, testosterone and oestradiol, were present in the mesonephric-gonadal complex of female and male sheep fetuses around sexual differentiation (that is, from day 28 to day 45 of gestation, with sexual differentiation occurring at approximately day 32). A second aim was to test whether the mesonephric-gonadal complex, mesonephros (days 35-45 on1y) and gonad (days 35-45 on1y) were capable of steroid synthesis in vitro. The steroid contents in the mesonephric-gonadal complex were not detectable before sexual differentiation. However, from day 35 of gestation onwards, the mesonephric-ovarian complex contained main1y oestradiol and the mesonephric-testicular complex contained main1y testosterone: from day 35 until day 45 the increase in content of these two steroids exceeded the increase in the mass of tissue by more than fivefold. From day 40 to day 45 of gestation, the contents of the other steroids in the pathways to oestradiol increased progressively in both sexes but more in parallel with the increase in tissue mass. In contrast to the steroid contents in the tissue at recovery, the mesonephric-gonadal tissue from both sexes in tissue culture was able to synthesize most steroids before and after sexual differentiation and also to metabolise supplementary androstenedione to oestradiol. These findings suggest that many, if not all, of the steroidogenic enzymes in the pathway from cholesterol to oestradiol are present before sexual differentiation. Most of the aforementioned steroids were present in detectable amounts in isolated mesonephros and gonad of both sexes after sexual differentiation. Moreover, for both the isolated mesonephros and gonad, there were increases in the mean contents of most steroids after culture relative to the contents in the tissues at recovery. These data suggest that the mesonephros, as well as the gonad, in both sexes is capable of synthesizing steroid. It is concluded that, in the sheep fetus, the female and male gonads are steroidogenically active after sexual differentiation, that the steroidogenic enzymes develop before sexual differentiation, and that the mesonephros is a site of steroid synthesis. MenosThe aim of the present study was to establish whether the steroids, progesterone, androstenedione, testosterone and oestradiol, were present in the mesonephric-gonadal complex of female and male sheep fetuses around sexual differentiation (that is, from day 28 to day 45 of gestation, with sexual differentiation occurring at approximately day 32). A second aim was to test whether the mesonephric-gonadal complex, mesonephros (days 35-45 on1y) and gonad (days 35-45 on1y) were capable of steroid synthesis in vitro. The steroid contents in the mesonephric-gonadal complex were not detectable before sexual differentiation. However, from day 35 of gestation onwards, the mesonephric-ovarian complex contained main1y oestradiol and the mesonephric-testicular complex contained main1y testosterone: from day 35 until day 45 the increase in content of these two steroids exceeded the increase in the mass of tissue by more than fivefold. From day 40 to day 45 of gestation, the contents of the other steroids in the pathways to oestradiol increased progressively in both sexes but more in parallel with the increase in tissue mass. In contrast to the steroid contents in the tissue at recovery, the mesonephric-gonadal tissue from both sexes in tissue culture was able to synthesize most steroids before and after sexual differentiation and also to metabolise supplementary androstenedione to oestradiol. These findings suggest that many, if not all, of the steroidogenic enzymes in the pathway from ch... Mostrar Tudo |
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Palavras-Chave: |
Diferenciação sexual; Esteroidogenese. |
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Thesagro: |
Ovino. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02918naa a2200217 a 4500
001 1528634
005 2002-10-16
008 1998 bl uuuu u00u1 u #d
100 1 $aLUN, S.
245 $aSteroid contents of and steroidogenesis in vitro by the developing gonad and mesonephros around sexual differentiation in fetal sheep.
260 $c1998
520 $aThe aim of the present study was to establish whether the steroids, progesterone, androstenedione, testosterone and oestradiol, were present in the mesonephric-gonadal complex of female and male sheep fetuses around sexual differentiation (that is, from day 28 to day 45 of gestation, with sexual differentiation occurring at approximately day 32). A second aim was to test whether the mesonephric-gonadal complex, mesonephros (days 35-45 on1y) and gonad (days 35-45 on1y) were capable of steroid synthesis in vitro. The steroid contents in the mesonephric-gonadal complex were not detectable before sexual differentiation. However, from day 35 of gestation onwards, the mesonephric-ovarian complex contained main1y oestradiol and the mesonephric-testicular complex contained main1y testosterone: from day 35 until day 45 the increase in content of these two steroids exceeded the increase in the mass of tissue by more than fivefold. From day 40 to day 45 of gestation, the contents of the other steroids in the pathways to oestradiol increased progressively in both sexes but more in parallel with the increase in tissue mass. In contrast to the steroid contents in the tissue at recovery, the mesonephric-gonadal tissue from both sexes in tissue culture was able to synthesize most steroids before and after sexual differentiation and also to metabolise supplementary androstenedione to oestradiol. These findings suggest that many, if not all, of the steroidogenic enzymes in the pathway from cholesterol to oestradiol are present before sexual differentiation. Most of the aforementioned steroids were present in detectable amounts in isolated mesonephros and gonad of both sexes after sexual differentiation. Moreover, for both the isolated mesonephros and gonad, there were increases in the mean contents of most steroids after culture relative to the contents in the tissues at recovery. These data suggest that the mesonephros, as well as the gonad, in both sexes is capable of synthesizing steroid. It is concluded that, in the sheep fetus, the female and male gonads are steroidogenically active after sexual differentiation, that the steroidogenic enzymes develop before sexual differentiation, and that the mesonephros is a site of steroid synthesis.
650 $aOvino
653 $aDiferenciação sexual
653 $aEsteroidogenese
700 1 $aSMITH, P.
700 1 $aLUNDY, T.
700 1 $aO'CONNELL, A.
700 1 $aHUDSON, N.
700 1 $aMcNATTY, K. P.
773 $tJournal of Reproduction and Fertility$gv. 114, n. 1, p. 131-139, 1998.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 11 | |
| 2. |  | DAVIS, S. C.; BODDEY, R. M.; ALVES, B. J. R.; COWIE, A. L.; GEORGE, B. H.; OGLE, S. M.; SMITH, P.; von NOORDWIJK, M.; van WIJK, M. T. Management swing potential for bioenergy crops. Global Change Bioenergy, v. 5, n. 6, p. 623-638, 2013.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Agrobiologia. |
|    |
| 3. | | RUMPEL, C.; AMIRASLANI, F.; CHENU, C.; GARCIA CARDENAS, M.; KAONGA, M.; KOUTIKA, L-S.; LADHA, J.; MADARI, B.; SHIRATO, Y.; SMITH, P.; SOUDI, B.; SOUSSANA, J-F.; WHITEHEAD, D.; WOLLENBERG, E. The 4p1000 initiative: opportunities, limitations and challenges for implementing soil organic carbon sequestration as a sustainable development strategy. Ambio, v. 49, n. 1, p. 350-360, Jan. 2020.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 4. | | CHENU, C.; AMIRASLANI, F.; GARCIA CARDENAS, M.; KAONGA, M.; KOUTIKA, L-S.; LADHA, J.; MADARI, B. E.; RUMPEL, C.; SHIRATO, Y.; SMITH, P.; SOUDI, B.; SOUSSANA, J-F; WHITEHEAD, D.; WOLLENBERG, L. The 4 per 1000 initiative. In: WORLD CONGRESS OF SOIL SCIENCE, 21., 2018, Rio de Janeiro. Soil science: beyond food and fuel: proceedings. Rio de Janeiro: SBCS, 2018.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
|  |
| 5. | | RUMPEL, C.; AMIRASLANI, F.; CHENU, C.; GARCIA CARDENAS, M.; KAONGA, M.; KOUTIKA, L-S; LADHA, J.; MADARI, B. E.; SHIRATO, Y.; SMITH, P.; SOUDI, B.; SOUSSANA, J-F.; WHITEHEAD, D.; WOLLENBERG, L. The 4 per mille initiative is promoting the implementation of sustainable development goals through science-policy-practice interactions. In: TERRAenVISION18, 2018, Barcelona. Conference: proceedings. Barcelona: University of Barcelona, 2018.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 6. | | SMITH, P.; DAVIES, C. A.; OGLE, S.; ZANCHI, G.; BELLARBY, J.; BIRD, N.; BODDEY, R. M.; NcNAMARA, N. P.; POLWSON, D.; COWIE, A.; VAN NOORDWIJK, M.; DAVIS, S. C.; RICHTER, D.; KRYZANOWSKI, L.; VAN WIJK, M.; STUART, J.; KIRTON, A.; EGGAR, D.; NEWTON-CROSS, G.; ADHYA, T.; BRAIMOH, A. K. Towards an integrated global framework to assess the impacts of land use and management change on soil carbon: current capability and future vision. Global Change Biology, v. 18, n. 7, p. 2089-2101, 2012.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Agrobiologia. |
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| 7. | | SOUSSANA, J-F.; ARIAS-NAVARRO, C.; BISPO, A.; CHENU, C.; SMITH, P.; KUHNERT, M.; FRELIH-LARSEN, A.; HERB, I.; KUIKMAN, P.; KEESSTRA, S.; VERHAGEN, J.; CLAESSENS, L.; MADARI, B. E.; DEMENOIS, J.; ALBRECHT, A.; VERCHOT, L.; MONTANARELLA, L.; HIEDERER, R.; GRUNDY, M.; BALDOCK, J.; CHOTTE, J-L.; KIM, J. Strategic research agenda on soil carbon in agricultural soils. Wageningen: CIRCASA, 2020. European Union's Horizon 2020 research and innovation programme grant agreement No 774378. Coordination of International Research Cooperation on soil Carbon Sequestration in Agriculture.| Tipo: Nota Técnica/Nota Científica |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 8. | | BRAY, A. W.; KIM, J. H.; SCHRUMPF, M.; PEACOCK, C.; BANWART, S.; SCHIPPER, L.; ANGERS, D.; CHIRINDA, N.; ZINN, Y. L.; ALBRECHT, A.; KUIKMAN, P.; JOUQUET, P.; DEMENOIS, J.; FARRELL, M.; SOUSSANA, J.-F.; KUHNERT, M.; MILNE, E.; FONTAINE, S.; TAGHIZADEH-TOOSI, A.; CERRI, C. E. P.; CORBEELS, M.; CARDINAEL, R.; CERVANTES, V. A.; OLESEN, J. E.; BATJES, N.; HEUVELINK, G.; MAIA, S. M. F.; KEESSTRA, S.; CLAESSEN, L.; MADARI, B. E.; VERCHOT, L.; NIE, W.; BRUNELLE, T.; MORAN, D.; FRANK, S.; BODLE, R.; FRELIH-LARSEN, A.; DOUGILL, A.; MONTANARELLA, L.; STRINGER, L.; CHENU, C.; HIEDERER, R.; SMITH, P.; ARIAS-NAVARRO, C. The science base of a strategic research agenda: executive summary. Wageningen: CIRCASA, 2019. 15 p. European Union's Horizon 2020 Research and Innovation Programme Grant Agreement No 774378. Coordination of International Research Cooperation on Soil Carbon Sequestration in Agriculture.| Tipo: Nota Técnica/Nota Científica |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 9. | | HERRERO, M.; THORNTON, P. K.; MASON-D'CROZ, D.; PALMER, J.; BENTON, T. G.; BODIRSKY, B. L.; BOGARD, J. R.; HALL, A.; LEE, B.; NYBORG, K.; PRADHAN, P.; BONNETT, G. D.; BRYAN, B. A.; CAMPBELL, B. M.; CHRISTENSEN, S.; CLARK, M.; COOK, M. T.; BOER, I. J. M. de; DOWNS, C.; DIZYEE, K.; FOLBERTH, C.; GODDE, C. M.; GERBER, J. S.; GRUNDY, M.; HAVLIK, P.; JARVIS, A.; KING, R.; LOBOGUERRERO, A. M.; LOPES, M. A.; MCLNTYRE, C. L.; NAYLOR, R.; NAVARRO, J.; OBERSTEINER, M.; PARODI, A.; PEOPLES, M. B.; PIKAAR, I.; POPP, A.; ROCKSTROM, J.; ROBERTSON, M. J.; SMITH, P.; STEHFEST, E.; SWAIN, S. M.; VALIN, H.; VAN WIJK, M.; VAN ZANTEN, H. H. E.; VERMEULEN, S.; VERVOORT, J.; WEST, P. C. Innovation can accelerate the transition towards a sustainable food system. Nature Food, v. 1, p. 266-272, May 2020. Perspective.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 5 |
| Biblioteca(s): Embrapa Agroenergia. |
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| 10. | | EASTWOOD, R. J.; TAMBAM, B. B.; ABOAGYE, L. M.; AKPAROV, Z. I.; ALADELE, S. E.; ALLEN, R.; AMRI, A.; ANGLIN, N.; ARAYA, R.; ARRIETA-ESPINOZA, G.; ASGEROV, A.; AWANG, K.; AWAS, T.; BARATA, A. M.; BOATENG, S. K.; BREHM, J. M.; BREIDY, J.; BREMAN, E.; ANGULO, A. B.; BURLE, M. L.; CASTAÑEDA-ÁLVAREZ, N. P.; CASIMIRO, P.; CHAVES, N. F.; CLEMENTE, A. S.; COCKEL, C. P.; DAVEY, A.; LA ROSA, L. de; DEBOUCK, D. G.; DEMPEWOLF, H.; DOKMAK, H.; ELLIS, D.; FARUK, A.; FREITAS, C.; GALSTYAN, S.; GARCÍA, R. M.; GHIMIRE, K. H.; GUARINO, L.; HARKER, R.; HOPE, R.; HUMPHRIES, A.; JAMORA, N.; JATOI, S. A.; KHUTSISHVILI, M.; KIKODZE, D.; KYRATZIS, A. C.; LEÓN-LOBOS, P.; LIU, U.; MAINALI, R. P.; MAMMADOV, A. T.; MANRIQUE-CARPINTERO, N. C.; MANZELLA, D.; ALI, M. S. M.; MEDEIROS, M. B. de; GUZMÁN, M. A. M.; MIKATADZE-PANTSULAIA, T.; MOHAMED, E. T. I.; MONTEROS-ALTAMIRANO, A.; MORALES, A.; MÜLLER, J. V.; MULUMBA, J. W.; NERSESYAN, A.; NÓBREGA, H.; NYAMONGO, D. O; OBREZA, M.; OKERE, A. U.; ORSENIGO, S.; ORTEGA-KLOSE, F.; PAPIKYAN, A.; PEARCE, T. R.; CARVALHO, M. A. A. P. de; PROHENS, J.; ROSSI, G.; SALAS, A.; SHRESTHA, D. S.; SIDDIQUI, S. U.; SMITH, P. P.; SOTOMAYOR, D. A.; TACÁN, M.; TAPIA, C.; TOLEDO, A.; TOLL, J.; VU, D. T.; VU, T. D.; WAY, M. J.; YAZBEK, M.; ZORRILLA, C.; KILIAN, B. Adapting agriculture to climate change: a synopsis of Coordinated National Crop Wild Relative Seed Collecting Programs across five continents. Plants, v. 11, 2022. 1840. Na publicação: Marcelo B. Medeiros.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 4 |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 11. | | MILNE, E.; BANWART, S. A.; NOELLEMEYER, E.; ABSON, D. J.; BALLABIO, C.; BAMPA, F.; BATIONO, A.; BATJES, N. H.; BERNOUX, M.; BHATTACHARYYA, T.; BLACK, H.; BUSCHIAZZO, D. E.; CAI, Z.; CERRI, C. E.; KUN, C.; COMPAGNONE, C.; CONANT, R.; COUTINHO, H. L. C.; BROGNIEZ, D. de; BALIEIRO, F. de C.; DUFFY, C.; FELLER, C.; FIDALGO, E. C. C.; SILVA, C. F. da; FUNK, R.; GAUDIG, G.; GICHERU, P. T.; GOLDHABER, M.; GOTTSCHALK, P.; GOULET, F.; GOVERSE, T.; GRATHWOHL, P.; JOOSTEN, H.; KAMONI, P. T.; KIHARA, J.; KRAWCZYNSKI, R.; SCALA JUNIOR, N. la; LEMANCEAU, P.; LI, L.; LI, Z.; LUGATO, E.; MARON, P. A.; MARTIUS, C.; MELILLO, J.; MONTANARELLA, L.; NIKOLAIDIS, N.; NZIGUHEBA, G.; PAN, G.; PASCUAL, U.; PAUSTIAN, K.; PIÑEIRO, G.; POWLSON, D.; QUIROGA, A.; RICHTER, D.; SIGWALT, A.; SIX, J.; SMITH, J.; SMITH, P.; STOCKING, M.; TANNEBERGER, F.; TERMANSEN, M.; NOORDWIJK, M. van; WESEMAEL, B. van; VARGAS, R.; VICTORIA, R. L.; WASWA, B.; WERNER, D.; WICHMANN, S.; WICHTMANN, W.; ZHANG, X.; ZHAO, Y.; ZHENG, J.; ZHENG, J. Soil carbon, multiple benefits. Environmental Development, v. 13, p. 33-38, Jan. 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Solos. |
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| Registros recuperados : 11 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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