Association of the PNPLA2, SCD1 and Leptin Expression with Fat
                    Distribution in Liver and Adipose Tissue From Obese Subjects

Lucía De la Cruz-Color; Zamira Helena Hernández-Nazará; Montserrat Maldonado-González; Eliseo Navarro-Muñíz; José Alfredo Domínguez-Rosales; José Rodrigo Torres-Baranda; Elizabeth del Carmen Ruelas-Cinco; Sandra Margarita Ramírez-Meza; Bertha Ruíz-Madrigal

doi:10.1055/a-0829-6324

Experimental and Clinical Endocrinology & Diabetes, Table of Contents

Exp Clin Endocrinol Diabetes 2020; 128(11): 715-722
DOI: 10.1055/a-0829-6324

Article

Association of the PNPLA2, SCD1 and Leptin Expression with Fat Distribution in Liver and Adipose Tissue From Obese Subjects

Lucía De la Cruz-Color

¹Programa de Doctorado en Ciencias en Biología Molecular en Medicina, Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara. Guadalajara, Jalisco, México

,

Zamira Helena Hernández-Nazará

²Instituto de Investigación de Enfermedades Crónico-Degenerativas del Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara. Guadalajara, Jalisco, México

,

Montserrat Maldonado-González

³Laboratorio de Investigación del Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara. Guadalajara, Jalisco, México

,

Eliseo Navarro-Muñíz

⁴División de Cirugía Nuevo Hospital Civil de Guadalajara “Dr. Juan I. Menchaca”. Guadalajara, Jalisco, México

,

José Alfredo Domínguez-Rosales

²Instituto de Investigación de Enfermedades Crónico-Degenerativas del Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara. Guadalajara, Jalisco, México

,

José Rodrigo Torres-Baranda

³Laboratorio de Investigación del Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara. Guadalajara, Jalisco, México

,

Elizabeth del Carmen Ruelas-Cinco

³Laboratorio de Investigación del Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara. Guadalajara, Jalisco, México

,

Sandra Margarita Ramírez-Meza

³Laboratorio de Investigación del Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara. Guadalajara, Jalisco, México

,

Bertha Ruíz-Madrigal

³Laboratorio de Investigación del Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara. Guadalajara, Jalisco, México

› Author Affiliations

Abstract

The expansion of adipose tissue is regulated by insulin and leptin through sterol regulatory element-binding protein-1c (SREBP-1c), up-regulating lipogenesis in tissues by Stearoylcoenzyme A desaturase 1 (SCD1) enzyme, while adipose triglyceride lipase (ATGL) enzyme is key in lipolysis. The research objective was to evaluate the expression of Sterol Regulatory Element Binding Transcription Factor 1 (SREBF1), SCD1, Patatin Like Phospholipase Domain Containing 2 (PNPLA2), and leptin (LEP) genes in hepatic-adipose tissue, and related them with the increment and distribution of fat depots of individuals without insulin resistance. Thirty-eight subjects undergoing elective cholecystectomy with liver and adipose tissue biopsies (subcutaneous-omental) are included. Tissue gene expression was assessed by qPCR and biochemical parameters determined. Individuals are classified according to the body mass index, classified as lean (control group, n=12), overweight (n=11) and obesity (n=15). Abdominal adiposity was determined by anthropometric and histopathological study of the liver. Increased SCD1 expression in omental adipose tissue (p=0.005) and PNPLA2 in liver (p=0.01) were found in the obesity group. PNPLA2 decreased expression in subcutaneous adipose tissue was significant in individuals with abdominal adiposity (p=0.017). Anthropometric parameters positively correlated with liver PNPLA2 and the expression of liver PNPLA2 with serum leptin. SCD1 increased levels may represent lipid storage activity in omental adipose tissue. Liver PNPLA2 increased expression could function as a primary compensatory event of visceral fat deposits associated to the leptin hormone related to the increase of adipose tissue.

Key words

fat deposit - obesity - leptin - SCD1 - PNPLA2

Full Text

References

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