Presentation_1_Tachykinin-3 Genes and Peptides Characterized in a Basal Teleost, the European Eel: Evolutionary Perspective and Pituitary Role.PDF
In mammals, neurokinin B (NKB) is a short peptide encoded by the gene tac3. It is involved in the brain control of reproduction by stimulating gonadotropin-releasing hormone (GnRH) neurons, mainly via kisspeptin. We investigated tac3 genes and peptides in a basal teleost, the European eel, which sho...
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ftfrontimediafig:oai:figshare.com:article/6478151 2023-05-15T16:08:40+02:00 Presentation_1_Tachykinin-3 Genes and Peptides Characterized in a Basal Teleost, the European Eel: Evolutionary Perspective and Pituitary Role.PDF Aurora Campo Anne-Gaëlle Lafont Benjamin Lefranc Jérôme Leprince Hervé Tostivint Nédia Kamech Sylvie Dufour Karine Rousseau 2018-06-11T12:32:19Z https://doi.org/10.3389/fendo.2018.00304.s001 https://figshare.com/articles/Presentation_1_Tachykinin-3_Genes_and_Peptides_Characterized_in_a_Basal_Teleost_the_European_Eel_Evolutionary_Perspective_and_Pituitary_Role_PDF/6478151 unknown doi:10.3389/fendo.2018.00304.s001 https://figshare.com/articles/Presentation_1_Tachykinin-3_Genes_and_Peptides_Characterized_in_a_Basal_Teleost_the_European_Eel_Evolutionary_Perspective_and_Pituitary_Role_PDF/6478151 CC BY 4.0 CC-BY Endocrinology Reproduction Cell Metabolism tachykinin-3 neurokinin B phylogeny synteny pituitary cell culture luteinizing hormone GnRH-R teleost Text Presentation 2018 ftfrontimediafig https://doi.org/10.3389/fendo.2018.00304.s001 2018-06-13T22:57:00Z In mammals, neurokinin B (NKB) is a short peptide encoded by the gene tac3. It is involved in the brain control of reproduction by stimulating gonadotropin-releasing hormone (GnRH) neurons, mainly via kisspeptin. We investigated tac3 genes and peptides in a basal teleost, the European eel, which shows an atypical blockade of the sexual maturation at a prepubertal stage. Two tac3 paralogous genes (tac3a and tac3b) were identified in the eel genome, each encoding two peptides (NKBa or b and NKB-related peptide NKB-RPa or b). Amino acid sequence of eel NKBa is identical to human NKB, and the three others are novel peptide sequences. The four eel peptides present the characteristic C-terminal tachykinin sequence, as well as a similar alpha helix 3D structure. Tac3 genes were identified in silico in 52 species of vertebrates, and a phylogeny analysis was performed on the predicted TAC3 pre-pro-peptide sequences. A synteny analysis was also done to further assess the evolutionary history of tac3 genes. Duplicated tac3 genes in teleosts likely result from the teleost-specific whole genome duplication (3R). Among teleosts, TAC3b precursor sequences are more divergent than TAC3a, and a loss of tac3b gene would have even occurred in some teleost lineages. NKB-RP peptide, encoded beside NKB by tac3 gene in actinopterygians and basal sarcopterygians, would have been lost in ancestral amniotes. Tissue distribution of eel tac3a and tac3b mRNAs showed major expression of both transcripts in the brain especially in the diencephalon, as analyzed by specific qPCRs. Human NKB has been tested in vitro on primary culture of eel pituitary cells. Human NKB dose-dependently inhibited the expression of lhβ, while having no effect on other glycoprotein hormone subunits (fshβ, tshβ, and gpα) nor on gh. Human NKB also dose-dependently inhibited the expression of GnRH receptor (gnrh-r2). The four eel peptides have been synthesized and also tested in vitro. They all inhibited the expression of both lhβ and of gnrh-r2. This reveals a ... Conference Object European eel Frontiers: Figshare |
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Frontiers: Figshare |
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topic |
Endocrinology Reproduction Cell Metabolism tachykinin-3 neurokinin B phylogeny synteny pituitary cell culture luteinizing hormone GnRH-R teleost |
spellingShingle |
Endocrinology Reproduction Cell Metabolism tachykinin-3 neurokinin B phylogeny synteny pituitary cell culture luteinizing hormone GnRH-R teleost Aurora Campo Anne-Gaëlle Lafont Benjamin Lefranc Jérôme Leprince Hervé Tostivint Nédia Kamech Sylvie Dufour Karine Rousseau Presentation_1_Tachykinin-3 Genes and Peptides Characterized in a Basal Teleost, the European Eel: Evolutionary Perspective and Pituitary Role.PDF |
topic_facet |
Endocrinology Reproduction Cell Metabolism tachykinin-3 neurokinin B phylogeny synteny pituitary cell culture luteinizing hormone GnRH-R teleost |
description |
In mammals, neurokinin B (NKB) is a short peptide encoded by the gene tac3. It is involved in the brain control of reproduction by stimulating gonadotropin-releasing hormone (GnRH) neurons, mainly via kisspeptin. We investigated tac3 genes and peptides in a basal teleost, the European eel, which shows an atypical blockade of the sexual maturation at a prepubertal stage. Two tac3 paralogous genes (tac3a and tac3b) were identified in the eel genome, each encoding two peptides (NKBa or b and NKB-related peptide NKB-RPa or b). Amino acid sequence of eel NKBa is identical to human NKB, and the three others are novel peptide sequences. The four eel peptides present the characteristic C-terminal tachykinin sequence, as well as a similar alpha helix 3D structure. Tac3 genes were identified in silico in 52 species of vertebrates, and a phylogeny analysis was performed on the predicted TAC3 pre-pro-peptide sequences. A synteny analysis was also done to further assess the evolutionary history of tac3 genes. Duplicated tac3 genes in teleosts likely result from the teleost-specific whole genome duplication (3R). Among teleosts, TAC3b precursor sequences are more divergent than TAC3a, and a loss of tac3b gene would have even occurred in some teleost lineages. NKB-RP peptide, encoded beside NKB by tac3 gene in actinopterygians and basal sarcopterygians, would have been lost in ancestral amniotes. Tissue distribution of eel tac3a and tac3b mRNAs showed major expression of both transcripts in the brain especially in the diencephalon, as analyzed by specific qPCRs. Human NKB has been tested in vitro on primary culture of eel pituitary cells. Human NKB dose-dependently inhibited the expression of lhβ, while having no effect on other glycoprotein hormone subunits (fshβ, tshβ, and gpα) nor on gh. Human NKB also dose-dependently inhibited the expression of GnRH receptor (gnrh-r2). The four eel peptides have been synthesized and also tested in vitro. They all inhibited the expression of both lhβ and of gnrh-r2. This reveals a ... |
format |
Conference Object |
author |
Aurora Campo Anne-Gaëlle Lafont Benjamin Lefranc Jérôme Leprince Hervé Tostivint Nédia Kamech Sylvie Dufour Karine Rousseau |
author_facet |
Aurora Campo Anne-Gaëlle Lafont Benjamin Lefranc Jérôme Leprince Hervé Tostivint Nédia Kamech Sylvie Dufour Karine Rousseau |
author_sort |
Aurora Campo |
title |
Presentation_1_Tachykinin-3 Genes and Peptides Characterized in a Basal Teleost, the European Eel: Evolutionary Perspective and Pituitary Role.PDF |
title_short |
Presentation_1_Tachykinin-3 Genes and Peptides Characterized in a Basal Teleost, the European Eel: Evolutionary Perspective and Pituitary Role.PDF |
title_full |
Presentation_1_Tachykinin-3 Genes and Peptides Characterized in a Basal Teleost, the European Eel: Evolutionary Perspective and Pituitary Role.PDF |
title_fullStr |
Presentation_1_Tachykinin-3 Genes and Peptides Characterized in a Basal Teleost, the European Eel: Evolutionary Perspective and Pituitary Role.PDF |
title_full_unstemmed |
Presentation_1_Tachykinin-3 Genes and Peptides Characterized in a Basal Teleost, the European Eel: Evolutionary Perspective and Pituitary Role.PDF |
title_sort |
presentation_1_tachykinin-3 genes and peptides characterized in a basal teleost, the european eel: evolutionary perspective and pituitary role.pdf |
publishDate |
2018 |
url |
https://doi.org/10.3389/fendo.2018.00304.s001 https://figshare.com/articles/Presentation_1_Tachykinin-3_Genes_and_Peptides_Characterized_in_a_Basal_Teleost_the_European_Eel_Evolutionary_Perspective_and_Pituitary_Role_PDF/6478151 |
genre |
European eel |
genre_facet |
European eel |
op_relation |
doi:10.3389/fendo.2018.00304.s001 https://figshare.com/articles/Presentation_1_Tachykinin-3_Genes_and_Peptides_Characterized_in_a_Basal_Teleost_the_European_Eel_Evolutionary_Perspective_and_Pituitary_Role_PDF/6478151 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fendo.2018.00304.s001 |
_version_ |
1766404682289250304 |