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PAHSAs reduce cellular senescence and protect pancreatic beta cells from metabolic stress through regulation of Mdm2/p53

Senescence in pancreatic beta cells plays a major role in beta cell dysfunction, which leads to impaired glucose homeostasis and diabetes. Therefore, prevention of beta cell senescence could reduce the risk of diabetes. Treatment of nonobese diabetic (NOD) mice, a model of type 1 autoimmune diabetes...

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Autores principales: Rubin de Celis, Maria F., Garcia-Martin, Ruben, Syed, Ismail, Lee, Jennifer, Aguayo-Mazzucato, Cristina, Bonner-Weir, Susan, Kahn, Barbara B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Academy of Sciences 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9704710/
https://www.ncbi.nlm.nih.gov/pubmed/36375063
http://dx.doi.org/10.1073/pnas.2206923119
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author Rubin de Celis, Maria F.
Garcia-Martin, Ruben
Syed, Ismail
Lee, Jennifer
Aguayo-Mazzucato, Cristina
Bonner-Weir, Susan
Kahn, Barbara B.
author_facet Rubin de Celis, Maria F.
Garcia-Martin, Ruben
Syed, Ismail
Lee, Jennifer
Aguayo-Mazzucato, Cristina
Bonner-Weir, Susan
Kahn, Barbara B.
author_sort Rubin de Celis, Maria F.
collection PubMed
description Senescence in pancreatic beta cells plays a major role in beta cell dysfunction, which leads to impaired glucose homeostasis and diabetes. Therefore, prevention of beta cell senescence could reduce the risk of diabetes. Treatment of nonobese diabetic (NOD) mice, a model of type 1 autoimmune diabetes (T1D), with palmitic acid hydroxy stearic acids (PAHSAs), a novel class of endogenous lipids with antidiabetic and antiinflammatory effects, delays the onset and reduces the incidence of T1D from 82% with vehicle treatment to 35% with PAHSAs. Here, we show that a major mechanism by which PAHSAs protect islets of the NOD mice is by directly preventing and reversing the initial steps of metabolic stress–induced senescence. In vitro PAHSAs increased Mdm2 expression, which decreases the stability of p53, a key inducer of senescence-related genes. In addition, PAHSAs enhanced expression of protective genes, such as those regulating DNA repair and glutathione metabolism and promoting autophagy. We demonstrate the translational relevance by showing that PAHSAs prevent and reverse early stages of senescence in metabolically stressed human islets by the same Mdm2 mechanism. Thus, a major mechanism for the dramatic effect of PAHSAs in reducing the incidence of type 1 diabetes in NOD mice is decreasing cellular senescence; PAHSAs may have a similar benefit in humans.
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spelling pubmed-97047102023-05-14 PAHSAs reduce cellular senescence and protect pancreatic beta cells from metabolic stress through regulation of Mdm2/p53 Rubin de Celis, Maria F. Garcia-Martin, Ruben Syed, Ismail Lee, Jennifer Aguayo-Mazzucato, Cristina Bonner-Weir, Susan Kahn, Barbara B. Proc Natl Acad Sci U S A Biological Sciences Senescence in pancreatic beta cells plays a major role in beta cell dysfunction, which leads to impaired glucose homeostasis and diabetes. Therefore, prevention of beta cell senescence could reduce the risk of diabetes. Treatment of nonobese diabetic (NOD) mice, a model of type 1 autoimmune diabetes (T1D), with palmitic acid hydroxy stearic acids (PAHSAs), a novel class of endogenous lipids with antidiabetic and antiinflammatory effects, delays the onset and reduces the incidence of T1D from 82% with vehicle treatment to 35% with PAHSAs. Here, we show that a major mechanism by which PAHSAs protect islets of the NOD mice is by directly preventing and reversing the initial steps of metabolic stress–induced senescence. In vitro PAHSAs increased Mdm2 expression, which decreases the stability of p53, a key inducer of senescence-related genes. In addition, PAHSAs enhanced expression of protective genes, such as those regulating DNA repair and glutathione metabolism and promoting autophagy. We demonstrate the translational relevance by showing that PAHSAs prevent and reverse early stages of senescence in metabolically stressed human islets by the same Mdm2 mechanism. Thus, a major mechanism for the dramatic effect of PAHSAs in reducing the incidence of type 1 diabetes in NOD mice is decreasing cellular senescence; PAHSAs may have a similar benefit in humans. National Academy of Sciences 2022-11-14 2022-11-22 /pmc/articles/PMC9704710/ /pubmed/36375063 http://dx.doi.org/10.1073/pnas.2206923119 Text en Copyright © 2022 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) .
spellingShingle Biological Sciences
Rubin de Celis, Maria F.
Garcia-Martin, Ruben
Syed, Ismail
Lee, Jennifer
Aguayo-Mazzucato, Cristina
Bonner-Weir, Susan
Kahn, Barbara B.
PAHSAs reduce cellular senescence and protect pancreatic beta cells from metabolic stress through regulation of Mdm2/p53
title PAHSAs reduce cellular senescence and protect pancreatic beta cells from metabolic stress through regulation of Mdm2/p53
title_full PAHSAs reduce cellular senescence and protect pancreatic beta cells from metabolic stress through regulation of Mdm2/p53
title_fullStr PAHSAs reduce cellular senescence and protect pancreatic beta cells from metabolic stress through regulation of Mdm2/p53
title_full_unstemmed PAHSAs reduce cellular senescence and protect pancreatic beta cells from metabolic stress through regulation of Mdm2/p53
title_short PAHSAs reduce cellular senescence and protect pancreatic beta cells from metabolic stress through regulation of Mdm2/p53
title_sort pahsas reduce cellular senescence and protect pancreatic beta cells from metabolic stress through regulation of mdm2/p53
topic Biological Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9704710/
https://www.ncbi.nlm.nih.gov/pubmed/36375063
http://dx.doi.org/10.1073/pnas.2206923119
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