Integrin Linked Kinase (ILK) Downregulation as an Early Event During the Development of Metabolic Alterations in a Short-Term High Fat Diet Mice Model.
AuthorsHatem Vaquero, Marco Antonio; Griera Merino, Mercedes; García Ayuso, Diego; Campillo De Blas, Sofía; Bohorquez Magro, María Lourdes; [et al.]
IdentifiersPermanent link (URI): http://hdl.handle.net/10017/50487
AffiliationUniversidad de Alcalá. Dirección de la Escuela Politécnica; Universidad de Alcalá. Departamento de Medicina y Especialidades Médicas; Universidad de Alcalá. Departamento de Biología de Sistemas
Instituto de Salud Carlos III-ISCIII
Comunidad de Madrid
Fondo Europeo de Desarrollo Regional-FEDER
Instituto Ramon y Cajal de Investigación Sanitária-IRYCIS
Fundación Renal Iñigo Álvarez de Toledo-FRIAT
Hatem-Vaquero, M. et al., 2020. Integrin linked kinase (ILK) downregulation as an early event during the development of metabolic alterations in a short-term high fat diet mice model. Cellular physiology and biochemistry, 54(1), pp.71-87.
Integrin linked kinase
Grants PI14/01939, PI14/02075, PI17/01513, PI17/00625, S2017/BMD-3751 (Instituto de Salud Carlos III (ISCIII), Comunidad de Madrid (NovelRen) and FEDER)
Grants RD12/0021/0006 and RD16/0009/0018 (FEDER and ISCIII RETIC REDinREN programs)
Grant 3.07 (Instituto Ramon y Cajal de Investigación Sanitária-IRYCIS)
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
© 2020 The Author(s). Published by Cell Physiol Biochem Press GmbH&Co. KG
Background/Aims: Diabetes type 2, metabolic syndrome or non-alcoholic fatty liver disease are insulin resistance-related metabolic disorders, which lack a better prognosis before their full establishment. We studied the importance of the intracellular scaffold protein integrin linked kinaes (ILK) as a key modulator in the initial pathogenesis and the early progression of those insulin resistance- related disorders. Methods: Adult mice with a global transgenic downregulation of ILK expression (cKD-ILK) and littermates without that depletion (CT) were fed with either standard (STD) or high fat (HFD) diets during 2 and 6 weeks. Weights, blood glucose and other systemic biochemical parameters were determined in animals under fasting conditions and after glucose or pyruvate intraperitoneal injections to test their tolerance. In RNA or proteins extracted from insulin-sensitive tissues, we determined by reverse transcription?quantitative PCR and western blot the expression of ILK, metabolites transporters and other metabolism and inflammatory markers. Glucose uptake capacity was studied in freshly isolated tissues. Results: HFD feeding was able to early and progressively increase glycaemia, insulinemia, circulating glycerol, body weight gain, liver-mediated gluconeogenesis along this time lapse, but cKD-ILK have all these systemic misbalances exacerbated compared to CT in the same HFD time lapse. Interestingly, the tisular expression of ILK in HFD-fed CT was dramatically downregulated in white adipose tissue (WAT), skeletal muscle and liver at the same extent of the original ILK downregulation of cKD-ILK. We previously published that basal STD-fed cKD-ILK compared to basal STD-CT have different expression of glucose transporters GLUT4 in WAT and skeletal muscle. In the same STD-fed cKD-ILK, we observed here the increased expressions of hepatic GLUT2 and WAT pro-inflammatory cytokines TNF-? and MCP-1. The administration of HFD exacerbated the expression changes in cKD-ILK of these and other markers related to the imbalanced metabolism observed, such as WAT lipolysis (HSL), hepatic gluconeogenesis (PCK-1) and glycerol transport (AQP9). Conclusion: ILK expression may be taken as a predictive determinant of metabolic disorders establishment, because its downregulation seems to correlate with the early imbalance of glucose and glycerol transport and the subsequent loss of systemic homeostasis of these metabolites.
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