Role of intestinal dysbiosis in non-alcoholic fatty liver disease pathogenesis through the regulation of liver lipid homeostasis (Q3205000)

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Project Q3205000 in Spain
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English
Role of intestinal dysbiosis in non-alcoholic fatty liver disease pathogenesis through the regulation of liver lipid homeostasis
Project Q3205000 in Spain

    Statements

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    35,750.0 Euro
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    71,500.0 Euro
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    50.0 percent
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    1 January 2017
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    31 March 2020
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    FUNDACION INSTITUTO DE INVESTIGACION SANITARIA PERE VIRGILI
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    41°7'2.06"N, 1°15'16.60"E
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    43148
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    OBJETIVOS: En base a resultados propios previos sobre metabolismo lipídico hepático y miRNAs en la enfermedad del hígado graso no alcohólico (EHGNA) y, dado que se ha sugerido la participación de la microbiota intestinal en la patogenia de EHGNA en relación posiblemente con la homeostasis lipídica hepática, pero con datos todavía limitados en humanos, en el actual proyecto de continuidad pretendemos: 1. Analizar en mujeres con obesidad severa y EHGNA los niveles circulantes de metabolitos derivados de la microbiota. 2. Determinar en la misma cohorte la expresión hepática de receptor Farnesoid X (FXR), de genes del metabolismo lipídico, de receptores tipo Toll (TLRs), en función de la presencia de EHGNA, y su relación con los niveles circulantes de metabolitos derivados de la microbiota. 3. Analizar la expresión intestinal de FXR, TLRs, péptido similar al glucagón 1 (GLP-1) y la enzima dipeptidil peptidasa 4 (DPP4) en relación con la expresión hepática de genes del metabolismo lipídico, la presencia de EHGNA, y los niveles de metabolitos derivados de la microbiota. 4. Evaluar, desde el punto de vista metabolómico, el potencial de los niveles circulantes de metabolitos relacionados con la microbiota como biomarcadores diagnósticos de diferenciación entre esteatosis simple y esteatohepatitis no alcohólica en pacientes con obesidad severa. METODOLOGÍA: Sujetos: 120 mujeres: 90 con obesidad mórbida subclasificadas según histología hepática: hígado normal, esteatosis o esteatohepatitis no alcohólica y 30 controles sanas normo-peso. Para validar el sistema diagnóstico generado, se dispone de una cohorte de validación independiente. Determinaciones: niveles circulantes de AGCC, ácidos biliares, colina, etanol endógeno y hormonas intestinales mediante metabolómica, expresión hepática de FXR, de genes del metabolismo lipídico y de TLRs; expresión intestinal de FXR, TLRs, GLP-1 y DPP4 mediante RT-PCR. (Spanish)
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    OBJECTIVES: Based on previous results on liver lipid metabolism and miRNAs in non-alcoholic fatty liver disease (EHGNA) and, given that the involvement of intestinal microbiota in EHGNA pathogenesis has been suggested in relation possibly to hepatic lipid homeostasis, but with still limited data in humans, in the current continuity project we intend to: 1. Analyse circulating levels of microbiota-derived metabolites in women with severe obesity and EHGNA. 2. Determine in the same cohort the hepatic expression of farnesoid X receptor (FXR), lipid metabolism genes, Toll receptor (TLRs), depending on the presence of EHGNA, and its relationship with circulating levels of microbiota-derived metabolites. 3. Analyse the intestinal expression of FXR, TLRs, glucagon 1-like peptide (GLP-1) and the enzyme dipeptidyl peptidase 4 (DPP4) in relation to liver expression of lipid metabolism genes, the presence of EHGNA, and levels of microbiota-derived metabolites. 4. To evaluate, from a metabolomic point of view, the potential of circulating levels of microbiota-related metabolites as diagnostic biomarkers of differentiation between simple steatosis and non-alcoholic steatohepatitis in patients with severe obesity. METHODOLOGY: Subjects: 120 women: 90 with morbid obesity subclassified according to liver histology: normal liver, steatosis or non-alcoholic steatohepatitis and 30 healthy normo-weight controls. To validate the generated diagnostic system, an independent validation cohort is available. Determinations: circulating levels of CCGA, bile acids, choline, endogenous ethanol and intestinal hormones using metabolomics, hepatic expression of FXR, lipid metabolism genes and TLRs; intestinal expression of FXR, TLRs, GLP-1 and DPP4 using RT-PCR. (English)
    14 October 2021
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    Tarragona
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    Identifiers

    PI16_00498
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