Meiju Saukko1, Y Antero Kesäniemi, Olavi Ukkola. 1. Institute of Clinical Medicine, Department of Internal Medicine and Biocenter Oulu, University of Oulu and Clinical Research Center, Oulu University Hospital, Oulu, Finland.
Abstract
BACKGROUND: Leptin is a hormone expressed by the leptin gene, primarily in adipocytes, controlling food intake and energy expenditure. The effects of leptin are mediated by its receptor (LEPR) located in the central nervous system and other tissues, including adipocytes and endothelial cells. The aim of this study was to characterize two polymorphisms of LEPR, Lys109Arg (rs1137100) and Gln223Arg (rs1137101), as risk factors for early atherosclerosis. This connection has not been studied before. METHODS: This study was performed in the randomly selected, middle-aged control subjects (n=526) from our well-defined OPERA (Oulu Project Elucidating Risk of Atherosclerosis) study. Analysis of covariance (ANCOVA) was performed to study the associations between genotypes, intima media thickness (IMT) measurements, and risk factors for atherosclerosis. RESULTS: Subjects with the genotype Lys109Arg had the lowest body mass index (BMI) (P = 0.035), whereas Arg109Arg homozygotes had the highest total cholesterol (P=0.021) when adjusted for sex and age. Gln223Arg associated independently with systolic blood pressure (P=0.036). There were no differences in leptin concentrations between the genotypes. The adjusted (sex, age, BMI, smoking status, low-density lipoprotein cholesterol, systolic blood pressure, and fasting blood glucose) means for the IMT measurements were lowest in the Arg109 and Arg223 homozygotes (P=0.042 and P=0.041, ANCOVA, respectively). CONCLUSIONS: The variations in the LEPR gene are independently associated with early atherosclerosis and some of its risk factors. These variations could possibly affect leptin signaling and thereby modify the effects of leptin on the atherosclerotic process.
BACKGROUND:Leptin is a hormone expressed by the leptin gene, primarily in adipocytes, controlling food intake and energy expenditure. The effects of leptin are mediated by its receptor (LEPR) located in the central nervous system and other tissues, including adipocytes and endothelial cells. The aim of this study was to characterize two polymorphisms of LEPR, Lys109Arg (rs1137100) and Gln223Arg (rs1137101), as risk factors for early atherosclerosis. This connection has not been studied before. METHODS: This study was performed in the randomly selected, middle-aged control subjects (n=526) from our well-defined OPERA (Oulu Project Elucidating Risk of Atherosclerosis) study. Analysis of covariance (ANCOVA) was performed to study the associations between genotypes, intima media thickness (IMT) measurements, and risk factors for atherosclerosis. RESULTS: Subjects with the genotype Lys109Arg had the lowest body mass index (BMI) (P = 0.035), whereas Arg109Arg homozygotes had the highest total cholesterol (P=0.021) when adjusted for sex and age. Gln223Arg associated independently with systolic blood pressure (P=0.036). There were no differences in leptin concentrations between the genotypes. The adjusted (sex, age, BMI, smoking status, low-density lipoprotein cholesterol, systolic blood pressure, and fasting blood glucose) means for the IMT measurements were lowest in the Arg109 and Arg223 homozygotes (P=0.042 and P=0.041, ANCOVA, respectively). CONCLUSIONS: The variations in the LEPR gene are independently associated with early atherosclerosis and some of its risk factors. These variations could possibly affect leptin signaling and thereby modify the effects of leptin on the atherosclerotic process.
Authors: Marjory Alana Marcello; Antonio Ramos Calixto; Jacqueline Fatima Martins de Almeida; Mariana Bonjiorno Martins; Lucas Leite Cunha; Camila Ayume Amano Cavalari; Elba C S Etchebehere; Ligia Vera Montalli da Assumpção; Bruno Geloneze; Andre Lopes Carvalho; Laura Sterian Ward Journal: Int J Endocrinol Date: 2015-02-25 Impact factor: 3.257
Authors: Vernicia Hernandez; Kavaljeet Kaur; Mohamed W ElSharief; Sari W Al Hajaj; Ahmed M Ebrahim; Mirash Razack; David Dragas Journal: Cureus Date: 2021-06-20