AUTHOR=Pixner Thomas , Stummer Nathalie , Schneider Anna Maria , Lukas Andreas , Gramlinger Karin , Julian Valérie , Thivel David , Mörwald Katharina , Mangge Harald , Dalus Christopher , Aigner Elmar , Furthner Dieter , Weghuber Daniel , Maruszczak Katharina TITLE=The relationship between glucose and the liver-alpha cell axis – A systematic review JOURNAL=Frontiers in Endocrinology VOLUME=13 YEAR=2023 URL=https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2022.1061682 DOI=10.3389/fendo.2022.1061682 ISSN=1664-2392 ABSTRACT=

Until recently, glucagon was considered a mere antagonist to insulin, protecting the body from hypoglycemia. This notion changed with the discovery of the liver-alpha cell axis (LACA) as a feedback loop. The LACA describes how glucagon secretion and pancreatic alpha cell proliferation are stimulated by circulating amino acids. Glucagon in turn leads to an upregulation of amino acid metabolism and ureagenesis in the liver. Several increasingly common diseases (e.g., non-alcoholic fatty liver disease, type 2 diabetes, obesity) disrupt this feedback loop. It is important for clinicians and researchers alike to understand the liver-alpha cell axis and the metabolic sequelae of these diseases. While most of previous studies have focused on fasting concentrations of glucagon and amino acids, there is limited knowledge of their dynamics after glucose administration. The authors of this systematic review applied PRISMA guidelines and conducted PubMed searches to provide results of 8078 articles (screened and if relevant, studied in full). This systematic review aims to provide better insight into the LACA and its mediators (amino acids and glucagon), focusing on the relationship between glucose and the LACA in adult and pediatric subjects.