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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Ocidental. Para informações adicionais entre em contato com cpaa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
12/08/2025 |
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Data da última atualização: |
12/08/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OLIVEIRA, R. G. de S.; MORAIS, I. S. de; PAIXÃO, R. V.; BANDEIRA, I. C.; DUNCAN, W. L. P.; O'SULLIVAN, F. L. A. |
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Afiliação: |
ROSILANE GOMES DE SOUZA OLIVEIRA, UNIVERSIDADE FEDERAL DO AMAZONAS; IRANÍ SILVA DE MORAIS, UNIVERSIDADE FEDERAL DO AMAZONAS; RÔMULO VEIGA PAIXÃO, UNIVERSIDADE FEDERAL DO AMAZONAS; IZABEL CORREA BANDEIRA, UNIVERSIDADE FEDERAL DO AMAZONAS; WALLICE LUIZ PAXIÚBA DUNCAN, UNIVERSIDADE FEDERAL DO AMAZONAS; FERNANDA LOUREIRO DE ALMEIDA OSULLIVAN, CPAA. |
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Título: |
Effects of gonadorelin on gonadotropin expression, plasma sex steroid concentrations and ovarian follicle dynamics in mature tambaqui (Colossoma macropomum). |
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Ano de publicação: |
2025 |
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Fonte/Imprenta: |
Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, v. 279, art. 111126, Aug.-Sept. 2025. |
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Idioma: |
Inglês |
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Conteúdo: |
In tambaqui (Colossoma macropomum), a rheophilic Amazonian fish of significant aquaculture importance that typically fails to spawn under captive conditions, gonadorelin has demonstrated potential in inducing ovulation and enabling strip spawning. However, the molecular mechanisms underlying gonadorelin action, particularly on the transcriptional regulation of follicle-stimulating hormone (fshβ) and luteinizing hormone (lhβ), remain poorly understood and warrant further investigation. The present study aimed to investigate the efficacy of this synthetic drug in modulating the expression of gonadotropins and in enhancing circulating concentrations of 17β-estradiol (E2), 17α-hydroxyprogesterone (17α-OHP), and testosterone (T) in tambaqui; as well as its effects on the developmental dynamics and maturation stages of ovarian follicles. Gonadorelin at 60 μg kg−1 body weight had no statistical effect on lhβ expression, but decreased fshβ expression in females (p = 0.021). |
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Palavras-Chave: |
Artificial reproduction; GnRH analogue; Neotropical fish. |
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Thesagro: |
Colossoma Macropomum; Tambaqui. |
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Thesaurus Nal: |
Gonadotropins. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01884naa a2200253 a 4500
001 2177919
005 2025-08-12
008 2025 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, R. G. de S.
245 $aEffects of gonadorelin on gonadotropin expression, plasma sex steroid concentrations and ovarian follicle dynamics in mature tambaqui (Colossoma macropomum).$h[electronic resource]
260 $c2025
520 $aIn tambaqui (Colossoma macropomum), a rheophilic Amazonian fish of significant aquaculture importance that typically fails to spawn under captive conditions, gonadorelin has demonstrated potential in inducing ovulation and enabling strip spawning. However, the molecular mechanisms underlying gonadorelin action, particularly on the transcriptional regulation of follicle-stimulating hormone (fshβ) and luteinizing hormone (lhβ), remain poorly understood and warrant further investigation. The present study aimed to investigate the efficacy of this synthetic drug in modulating the expression of gonadotropins and in enhancing circulating concentrations of 17β-estradiol (E2), 17α-hydroxyprogesterone (17α-OHP), and testosterone (T) in tambaqui; as well as its effects on the developmental dynamics and maturation stages of ovarian follicles. Gonadorelin at 60 μg kg−1 body weight had no statistical effect on lhβ expression, but decreased fshβ expression in females (p = 0.021).
650 $aGonadotropins
650 $aColossoma Macropomum
650 $aTambaqui
653 $aArtificial reproduction
653 $aGnRH analogue
653 $aNeotropical fish
700 1 $aMORAIS, I. S. de
700 1 $aPAIXÃO, R. V.
700 1 $aBANDEIRA, I. C.
700 1 $aDUNCAN, W. L. P.
700 1 $aO'SULLIVAN, F. L. A.
773 $tComparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology$gv. 279, art. 111126, Aug.-Sept. 2025.
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Embrapa Amazônia Ocidental (CPAA) |
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| 1. |  | VALK, H. van der; KOOMEN, I.; NOCELLI, R. C. F.; RIBEIRO, M. de F.; FREITAS, B. M.; CARVALHO, S.; KASINA, J. M.; MARTINS, D.; MUTISO, M.; ODHIAMBO, C.; KINUTHIA, W.; GIKUNGU, M.; NGARUIYA, P.; MAINA, G.; KIPYAB, P.; BLACQUIERE, T.; STEEN, J. van der; ROESSINK, I.; WASSENBER, J.; HERREN, B. G. Aspects determining the risk of pesticides to wild bees: risk profiles for focal crops on three continents. Julius Kühn Archiv, n. 437, p. 142-158, 2012. Edição dos Proceedings of the 11 International Symposium Hazards of Pesticides to Bees, Wageningen, nov. 2011.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 2. | | CHAM, K. O.; NOCELLI, R. C. F.; BORGES, L. O.; VIANA-SILVA, F. E. C.; TONELLI, C. A. M.; MALASPINA, O.; MENEZES, C.; ROSA-FONTANA, A. S.; BLOCHTEIN, B.; FREITAS, B. M.; PIRES, C. S. S.; OLIVEIRA, F. F.; CONTRERA, F. A. L.; TOREZANI, K. R. S.; RIBEIRO, M. de F.; SIQUEIRA, M. A. L.; ROCHA, M. C. L. S. A. Pesticide exposure assessment paradigm for stingless bees. Environmental Entomology, v. 48, n. 1, p. 36-48, 2019.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Meio Ambiente; Embrapa Recursos Genéticos e Biotecnologia; Embrapa Semiárido. |
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