Alpha cell receptor for advanced glycation end products associate with glucagon expression in type 1 diabetes

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Leung, Sherman S
Lenchik, Nataliya
Mathews, Clayton
Pugliese, Alberto
McCarthy, Domenica A
Le Bagge, Selena
Ewing, Adam
Harris, Mark
Radford, Kristen J
Borg, Danielle J
Gerling, Ivan
Forbes, Josephine M
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2023
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Abstract

Hypoglycemia in type 1 diabetes associates with changes in the pancreatic islet α cells, where the receptor for advanced glycation end products (RAGE) is highly expressed. This study compared islet RAGE expression in donors without diabetes, those at risk of, and those with type 1 diabetes. Laser-dissected islets were subject to RNA bioinformatics and adjacent pancreatic tissue were assessed by confocal microscopy. We found that islets from type 1 diabetes donors had differential expression of the RAGE gene (AGER) and its correlated genes, based on glucagon expression. Random forest machine learning revealed that AGER was the most important predictor for islet glucagon levels. Conversely, a generalized linear model identified that glucagon expression could be predicted by expression of RAGE signaling molecules, its ligands and enzymes that create or clear RAGE ligands. Confocal imaging co-localized RAGE, its ligands and signaling molecules to the α cells. Half of the type 1 diabetes cohort comprised of adolescents and a patient with history of hypoglycemia—all showed an inverse relationship between glucagon and RAGE. These data confirm an association between glucagon and islet RAGE, its ligands and signaling pathways in type 1 diabetes, which warrants functional investigation into a role for RAGE in hypoglycemia.

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Scientific Reports

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13

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© The Author(s) 2023. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Endocrinology

Biomedical and clinical sciences

Science & Technology

Multidisciplinary Sciences

Science & Technology - Other Topics

BETA-CELL

BRAIN-DAMAGE

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Leung, SS; Lenchik, N; Mathews, C; Pugliese, A; McCarthy, DA; Le Bagge, S; Ewing, A; Harris, M; Radford, KJ; Borg, DJ; Gerling, I; Forbes, JM, Alpha cell receptor for advanced glycation end products associate with glucagon expression in type 1 diabetes, Scientific Reports, 2023, 13, pp. 12948

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