Insulin action on protein synthesis and its association with eIF5A expression and hypusination

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dc.contributor.authorde Proença, André Ricardo Gomes
dc.contributor.authorPereira, Karina Danielle [UNESP]
dc.contributor.authorMeneguello, Leticia [UNESP]
dc.contributor.authorTamborlin, Leticia [UNESP]
dc.contributor.authorLuchessi, Augusto Ducati [UNESP]
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2019-10-06T15:26:56Z
dc.date.available2019-10-06T15:26:56Z
dc.date.issued2019-02-01
dc.description.abstractThe hormone insulin plays a central role in the metabolism of carbohydrates, lipids, and proteins. In relation to protein metabolism, insulin stimulates amino acid uptake and activates protein synthesis in responsive cells by modulation of signal transduction pathways, such as associated to Akt/PkB, mTOR, S6Ks, 4E-BP1, and several translation initiation/elongation factors. In this context, there is no information on direct cellular treatment with insulin and effects on eukaryotic translation initiation factor 5A (eIF5A) regulation. The eIF5A protein contains an exclusive amino acid residue denominated hypusine, which is essential for its activity and synthesized by posttranslational modification of a specific lysine residue using spermidine as substrate. The eIF5A protein is involved in cellular proliferation and differentiation processes, as observed for satellite cells derived from rat muscles, revealing that eIF5A has an important role in muscle regeneration. The aim of this study was to determine whether eIF5A expression and hypusination are influenced by direct treatment of insulin on L6 myoblast cells. We observed that insulin increased the content of eIF5A transcripts. This effect occurred in cells treated or depleted of fetal bovine serum, revealing a positive insulin effect independent of other serum components. In addition, it was observed that hypusination follows the maintenance of eIF5A protein content in the serum depleted cells and treated with insulin. These results demonstrate that eIF5A is modulated by insulin, contributing the protein synthesis machinery control, as observed by puromycin incorporation in nascent proteins.en
dc.description.affiliationLaboratory of Biotechnology School of Applied Sciences University of Campinas (UNICAMP)
dc.description.affiliationInstitute of Biosciences São Paulo State University (UNESP)
dc.description.affiliationLaboratório de Biotecnologia Faculdade de Ciências Aplicadas Universidade Estadual de Campinas, Rua Pedro Zaccaria, 1300
dc.description.affiliationUnespInstitute of Biosciences São Paulo State University (UNESP)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2010/18095-0
dc.description.sponsorshipIdFAPESP: 2013/20504-3
dc.description.sponsorshipIdFAPESP: 2013/23620-4
dc.description.sponsorshipIdFAPESP: 2014/27154-0
dc.description.sponsorshipIdFAPESP: 2017/21914-1
dc.format.extent587-596
dc.identifierhttp://dx.doi.org/10.1007/s11033-018-4512-1
dc.identifier.citationMolecular Biology Reports, v. 46, n. 1, p. 587-596, 2019.
dc.identifier.doi10.1007/s11033-018-4512-1
dc.identifier.issn1573-4978
dc.identifier.issn0301-4851
dc.identifier.scopus2-s2.0-85057983669
dc.identifier.urihttp://hdl.handle.net/11449/187147
dc.language.isoeng
dc.relation.ispartofMolecular Biology Reports
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjecteIF5A
dc.subjectHypusine
dc.subjectInsulin
dc.subjectMyoblast cells
dc.subjectProtein synthesis
dc.titleInsulin action on protein synthesis and its association with eIF5A expression and hypusinationen
dc.typeArtigo
unesp.author.orcid0000-0003-2080-3524[5]

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