The Influence Of Ageing On The Insulin Signalling System In Rat Lacrimal And Salivary Glands.

dc.creatorRocha, Eduardo M
dc.creatorCarvalho, Carla R O
dc.creatorSaad, Mário J A
dc.creatorVelloso, Lício A
dc.date2003-Dec
dc.date2015-11-27T12:52:34Z
dc.date2015-11-27T12:52:34Z
dc.date.accessioned2018-03-29T00:58:16Z
dc.date.available2018-03-29T00:58:16Z
dc.identifierActa Ophthalmologica Scandinavica. v. 81, n. 6, p. 639-45, 2003-Dec.
dc.identifier1395-3907
dc.identifier
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/14641268
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/195601
dc.identifier14641268
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1295834
dc.descriptionAgeing adversely affects the structure and function of lacrimal and salivary glands (LG and SG) and leads to marked insulin resistance that correlates with reduced insulin signal transduction. The aim of this study was to investigate whether ageing affects insulin signal transduction in LG and SG in vivo. Male Wistar rats aged 20 months and 2 months (control group) were compared (n=8/group). Samples were removed under anaesthesia after i.v. injection of insulin, homogenized, immunoprecipitated with anti-insulin receptor (IR), Shc and STAT-1 antibodies and immunoblotted with antiphosphotyrosine antibody. The 20-month-old rats were significantly hyperinsulinaemic and presented a reduced rate of blood glucose disappearance in response to insulin, compared to the 2-month-old rats. The level of phosphorylation determined by densitometry in the older group of rats showed that ageing significantly reduced insulin-induced IR phosphorylation in LG and SG and STAT-1 phosphorylation in SG, compared to in the control group, but did not alter Shc phosphorylation. Ageing influences insulin signal transduction in the LG and SG of rats. Considering the major anabolic actions of insulin, these observations may help to explain the mechanisms of LG and SG dysfunctions observed in ageing.
dc.description81
dc.description639-45
dc.languageeng
dc.relationActa Ophthalmologica Scandinavica
dc.relationActa Ophthalmol Scand
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectAdaptor Proteins, Signal Transducing
dc.subjectAdaptor Proteins, Vesicular Transport
dc.subjectAging
dc.subjectAnimals
dc.subjectBlood Glucose
dc.subjectDna-binding Proteins
dc.subjectHypoglycemic Agents
dc.subjectInsulin
dc.subjectLacrimal Apparatus
dc.subjectMale
dc.subjectPhosphorylation
dc.subjectRats
dc.subjectRats, Wistar
dc.subjectReceptor, Insulin
dc.subjectStat1 Transcription Factor
dc.subjectSalivary Glands
dc.subjectShc Signaling Adaptor Proteins
dc.subjectSignal Transduction
dc.subjectTrans-activators
dc.titleThe Influence Of Ageing On The Insulin Signalling System In Rat Lacrimal And Salivary Glands.
dc.typeArtículos de revistas


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