Hepatic lipase deficiency produces glucose intolerance, inflammation and hepatic steatosis
Por:
I. ANDRES-BLASCO, A. HERRERO-CERVERA, A. VINUE, S. MARTINEZ-HERVAS, L. PIQUERAS, M. SANZ, D. BURKS and H. GONZALEZ-NAVARRO
Publicada:
1 dic 2015
Resumen:
Metabolic syndrome and type 2 diabetes mellitus constitute a major problem to global health, and their incidence is increasing at an alarming rate. Non-alcoholic fatty liver disease, which affects up to 90% of obese people and nearly 70% of the overweight, is commonly associated with MetS characteristics such as obesity, insulin resistance, hypertension and dyslipidemia. In the present study, we demonstrate that hepatic lipase (HL)-inactivation in mice fed with a high-fat, high-cholesterol diet produced dyslipidemia including hypercholesterolemia, hypertriglyceridemia and increased non-esterified fatty acid levels. These changes were accompanied by glucose intolerance, pancreatic and hepatic inflammation and steatosis. In addition, compared with WT mice, HL-/- mice exhibited enhanced circulating MCP1 levels, monocytosis and higher percentage of CD4CTh17C cells. Consistent with increased inflammation, livers from HL-/- mice had augmented activation of the stress SAPK/JNK- and p38-pathways compared with the activation levels of the kinases in livers from WT mice. Analysis of HL-/- and WT mice fed regular chow diet showed dyslipidemia and glucose intolerance in HL-/- mice without any other changes in inflammation or hepatic steatosis. Altogether, these results indicate that dyslipidemia induced by HL-deficiency in combination with a high-fat, high-cholesterol diet promotes hepatic steatosis and inflammation in mice which are, at least in part, mediated by the activation of the stress SAPK/JNK- and p38-pathways. Future studies are warranted to asses the viability of therapeutic strategies based on the modulation of these kinases to reduce hepatic steatosis associated to lipase dysfunction.
Filiaciones:
I. ANDRES-BLASCO:
Inst Hlth Res INCLIVA, Valencia 46010, Spain
A. HERRERO-CERVERA:
Inst Hlth Res INCLIVA, Valencia 46010, Spain
A. VINUE:
Inst Hlth Res INCLIVA, Valencia 46010, Spain
S. MARTINEZ-HERVAS:
Inst Hlth Res INCLIVA, Valencia 46010, Spain
Univ Valencia, Endocrinol & Nutr Dept, Clin Hosp, Valencia, Spain
Univ Valencia, Dept Med, Valencia, Spain
CIBER Diabet & Enfermedades Metab Asociadas CIBER, Valencia, Spain
L. PIQUERAS:
Inst Hlth Res INCLIVA, Valencia 46010, Spain
M. SANZ:
Inst Hlth Res INCLIVA, Valencia 46010, Spain
Univ Valencia, Dept Farmacol, Valencia, Spain
:
CIBER Diabet & Enfermedades Metab Asociadas CIBER, Valencia, Spain
Ctr Invest Principe Felipe, Valencia, Spain
H. GONZALEZ-NAVARRO:
Inst Hlth Res INCLIVA, Valencia 46010, Spain
CIBER Diabet & Enfermedades Metab Asociadas CIBER, Valencia, Spain
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