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Chehade C, Amaral FG, Branco GS, Cassel M, De Jesus LWO, Costa FG, Bordin SA, Moreira RG, Borella MI. Molecular characterization of different preproGnRHs in Astyanax altiparanae (Characiformes): Effects of GnRH on female reproduction. Mol Reprod Dev 2020; 87:720-734. [PMID: 32418283 DOI: 10.1002/mrd.23351] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 05/03/2020] [Indexed: 12/13/2022]
Abstract
Gonadotropin-releasing hormone (GnRH) is a key molecule in the initiation of the hypothalamic-pituitary-gonadal axis. Thus, knowledge about GnRH may contribute to the effectiveness of species reproduction. Using a Neotropical tetra Astyanax altiparanae as a fish model species, the GnRH forms were characterized at the molecular level and the role of injected GnRHs in vivo was evaluated. The full-length complementary DNA (cDNA) sequences of preproGnRH2 (612 bp) and preproGnRH3 (407 bp) of A. altiparanae were obtained, and the GnRH1 form was not detected. The cDNA sequences of preproGnRH2 and preproGnRH3 were found to be conserved, but a change in the amino acid at position 8 of the GnRH3 decapeptide of A. altiparanae was observed. All the injected GnRHs stimulated lhβ messenger RNA (mRNA) expression but not fshβ mRNA expression, and only GnRH2 was able to increase maturation-inducing steroid (MIS) levels and possibly stimulate oocyte release. Furthermore, only GnRH2 was able to start the entire reproductive hormonal cascade and induce spawning.
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Affiliation(s)
- Chayrra Chehade
- Fish Endocrinology Laboratory, Department of Cell and Developmental Biology, Biomedical Sciences Institute, University of São Paulo (USP), São Paulo, Brazil
| | - Fernanda G Amaral
- Department of Physiology and Biophysics, Biomedical Sciences Institute, University of São Paulo (USP), São Paulo, São Paulo, Brazil.,Department of Physiology, Federal University of São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - Giovana S Branco
- Fish Endocrinology Laboratory, Department of Cell and Developmental Biology, Biomedical Sciences Institute, University of São Paulo (USP), São Paulo, Brazil
| | - Mônica Cassel
- Department of Education - Bachelor of Science in Animal Science, Mato Grosso Federal Institute of Education, Science, and Technology (IFMT)-Alta Floresta Campus, Alta Floresta, Mato Grosso, Brazil
| | - Lázaro W O De Jesus
- Laboratory of Applied Animal Morphophysiology, Department of Histology and Embryology, Institute of Biological Sciences and Health, Federal University of Alagoas (UFAL), Maceio, Alagoas, Brazil
| | - Fabiano G Costa
- Department of Biological Sciences, State University of Northern Paraná (UENP), Jacarezinho, Paraná, Brazil
| | - Silvana A Bordin
- Department of Physiology and Biophysics, Biomedical Sciences Institute, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | - Renata G Moreira
- Laboratory of Metabolism and Reproduction of Aquatic Organisms, Department of Physiology, Institute of Biosciences, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | - Maria I Borella
- Fish Endocrinology Laboratory, Department of Cell and Developmental Biology, Biomedical Sciences Institute, University of São Paulo (USP), São Paulo, Brazil
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de Souza D, Mariano DOC, Nedel F, Schultze E, Campos VF, Seixas F, da Silva RS, Munchen TS, Ilha V, Dornelles L, Braga AL, Rocha JBT, Collares T, Rodrigues OED. New Organochalcogen Multitarget Drug: Synthesis and Antioxidant and Antitumoral Activities of Chalcogenozidovudine Derivatives. J Med Chem 2015; 58:3329-39. [DOI: 10.1021/jm5015296] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Diego de Souza
- LabSelen-NanoBio
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Douglas O. C. Mariano
- LabSelen-NanoBio
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Fernanda Nedel
- Molecular
and Cellular Oncology Group, Graduate Program in Biotechnology, Universidade Federal de Pelotas, 96010-610 Pelotas, Brazil
| | - Eduarda Schultze
- Molecular
and Cellular Oncology Group, Graduate Program in Biotechnology, Universidade Federal de Pelotas, 96010-610 Pelotas, Brazil
| | - Vinícius F. Campos
- Molecular
and Cellular Oncology Group, Graduate Program in Biotechnology, Universidade Federal de Pelotas, 96010-610 Pelotas, Brazil
| | - Fabiana Seixas
- Molecular
and Cellular Oncology Group, Graduate Program in Biotechnology, Universidade Federal de Pelotas, 96010-610 Pelotas, Brazil
| | - Rafael S. da Silva
- LabSelen-NanoBio
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Taiana S. Munchen
- LabSelen-NanoBio
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Vinicius Ilha
- LabSelen-NanoBio
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Luciano Dornelles
- LabSelen-NanoBio
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Antonio L. Braga
- Departamento
de Química, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, Brazil
| | - João B. T. Rocha
- LabSelen-NanoBio
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Tiago Collares
- Molecular
and Cellular Oncology Group, Graduate Program in Biotechnology, Universidade Federal de Pelotas, 96010-610 Pelotas, Brazil
| | - Oscar E. D. Rodrigues
- LabSelen-NanoBio
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
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Campos VF, Robaldo RB, Deschamps JC, Seixas FK, McBride AJA, Marins LF, Okamoto M, Sampaio LA, Collares T. Neuropeptide Y gene expression around meal time in the Brazilian flounder Paralichthys orbignyanus. J Biosci 2012; 37:227-32. [PMID: 22581328 DOI: 10.1007/s12038-012-9205-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Neuropeptide Y (NPY) is considered the major stimulant for food intake in mammals and fish. Previous results indicate that NPY is involved in the feeding behaviour of the Brazilian flounder, Paralichthys orbignyanus. In this study, we evaluated hypothalamic NPY expression before (-2 h), during (0 h) and after feeding (+2 h) in two independent experiments: (1) during a normal feeding schedule and (2) in fish fasted for 2 weeks. During normal feeding, changes in the levels of NPY mRNA were periprandial, with expression levels being significantly elevated at meal time (P less than 0.05) and significantly reduced 2 h later (P less than 0.05). Comparing the fasting and unfasted groups, NPY mRNA levels were significantly higher (P less than 0.05) at -2 h and +2 h in the fasting group, but there was no difference at 0 h. In addition, the higher NPY mRNA levels that were observed in the fasting group were maintained throughout the sampling period. In summary, our results show that NPY expression was associated with meal time (0 h) in food intake regulation.
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Affiliation(s)
- Vinicius F Campos
- Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, CP 354, 96010-900, Pelotas, RS, Brazil.
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