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AMPK involvement in endoplasmic reticulum stress and autophagy modulation after fatty liver graft preservation: a role for melatonin and trimetazidine cocktail.
Zaouali, Mohamed Amine; Boncompagni, Eleonora; Reiter, Russel J; Bejaoui, Mohamed; Freitas, Isabel; Pantazi, Eirini; Folch-Puy, Emma; Abdennebi, Hassen Ben; Garcia-Gil, Francisco A; Roselló-Catafau, Joan.
Afiliação
  • Zaouali MA; Experimental Hepatic Ischemia-Reperfusion Unit, Institut d'Investigacions Biomèdiques de Barcelona (IIBB), Consejo Superior de Investigaciones Científicas, IDIBAPS-Ciberehd, Barcelona, Spain.
J Pineal Res ; 55(1): 65-78, 2013 Aug.
Article em En | MEDLINE | ID: mdl-23551302
Ischemia/reperfusion injury (IRI) associated with liver transplantation plays an important role in the induction of graft injury. Prolonged cold storage remains a risk factor for liver graft outcome, especially when steatosis is present. Steatotic livers exhibit exacerbated endoplasmic reticulum (ER) stress that occurs in response to cold IRI. In addition, a defective liver autophagy correlates well with liver damage. Here, we evaluated the combined effect of melatonin and trimetazidine as additives to IGL-1 solution in the modulation of ER stress and autophagy in steatotic liver grafts through activation of AMPK. Steatotic livers were preserved for 24 hr (4°C) in UW or IGL-1 solutions with or without MEL + TMZ and subjected to 2-hr reperfusion (37°C). We assessed hepatic injury (ALT and AST) and function (bile production). We evaluated ER stress (GRP78, PERK, and CHOP) and autophagy (beclin-1, ATG7, LC3B, and P62). Steatotic livers preserved in IGL-1 + MEL + TMZ showed lower injury and better function as compared to those preserved in IGL-1 alone. IGL-1 + MEL + TMZ induced a significant decrease in GRP78, pPERK, and CHOP activation after reperfusion. This was consistent with a major activation of autophagic parameters (beclin-1, ATG7, and LC3B) and AMPK phosphorylation. The inhibition of AMPK induced an increase in ER stress and a significant reduction in autophagy. These data confirm the close relationship between AMPK activation and ER stress and autophagy after cold IRI. The addition of melatonin and TMZ to IGL-1 solution improved steatotic liver graft preservation through AMPK activation, which reduces ER stress and increases autophagy.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Autofagia / Trimetazidina / Proteínas Quinases Ativadas por AMP / Fígado Gorduroso / Estresse do Retículo Endoplasmático / Melatonina Tipo de estudo: Risk_factors_studies Limite: Animals Idioma: En Ano de publicação: 2013 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Autofagia / Trimetazidina / Proteínas Quinases Ativadas por AMP / Fígado Gorduroso / Estresse do Retículo Endoplasmático / Melatonina Tipo de estudo: Risk_factors_studies Limite: Animals Idioma: En Ano de publicação: 2013 Tipo de documento: Article