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Age-associated global DNA hypermethylation augments the sensitivity of hearts towards ischemia-reperfusion injury

Most pre-clinical studies in cardiac ischemia-reperfusion injury (I/R) are carried out in young or old animals, which does not cater to the adult age in humans who encounter I/R. Not many studies in the literature are available that emphasize the sensitivity of the adult heart to injury from the you...

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Autores principales: Boovarahan, Sri Rahavi, Ali, Nemat, AlAsmari, Abdullah F., Alameen, Alaa Alnoor, Khan, Rehan, Kurian, Gino A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9705337/
https://www.ncbi.nlm.nih.gov/pubmed/36457746
http://dx.doi.org/10.3389/fgene.2022.995887
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author Boovarahan, Sri Rahavi
Ali, Nemat
AlAsmari, Abdullah F.
Alameen, Alaa Alnoor
Khan, Rehan
Kurian, Gino A.
author_facet Boovarahan, Sri Rahavi
Ali, Nemat
AlAsmari, Abdullah F.
Alameen, Alaa Alnoor
Khan, Rehan
Kurian, Gino A.
author_sort Boovarahan, Sri Rahavi
collection PubMed
description Most pre-clinical studies in cardiac ischemia-reperfusion injury (I/R) are carried out in young or old animals, which does not cater to the adult age in humans who encounter I/R. Not many studies in the literature are available that emphasize the sensitivity of the adult heart to injury from the young heart, where there exist distinct alterations in DNA methylation and mitochondrial function that contribute to injury. In the present study, we utilized young (8 weeks old) and adult (24 weeks old) rat hearts to evaluate distinct DNA methylation alterations that contribute to I/R injury. The cardiac basal physiological activities in young and adult rat hearts were insignificantly changed from normal. But the DNA hypermethylation and expression level of mitochondrial genes were slightly higher in adult rat hearts. The consequential effect of these changes was measured in the I/R heart to understand its response to additional stress. Accordingly, we noted an increase in global DNA hypermethylation levels by 40% and 62% in young and adult I/R hearts, respectively, from their respective control. Subsequently, a decline in mitochondrial genes (ND1, ND4L, ND6, Cyt B, COX1, COX2, and ATP8) that regulate cardiac contractility was observed in adult I/R hearts. These changes, in turn, reduced hemodynamics (Rate pressure product) by 51% and 32% in adult and young I/R hearts, respectively, from their controls. Besides, the I/R-linked infarct size was higher in adult hearts (58%) than in young hearts (37%). Correlation analysis showed a significant negative correlation of global DNA methylation with the MT-ND1 expression (r = −0.7591), MFN2 expression (r = −0.8561) and cardiac RPP (r = −0.8015) in adult I/R hearts. Based on the above observations, we concluded that age promoted DNA methylation and deteriorated cardiac responsive ability to resist I/R injury.
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spelling pubmed-97053372022-11-30 Age-associated global DNA hypermethylation augments the sensitivity of hearts towards ischemia-reperfusion injury Boovarahan, Sri Rahavi Ali, Nemat AlAsmari, Abdullah F. Alameen, Alaa Alnoor Khan, Rehan Kurian, Gino A. Front Genet Genetics Most pre-clinical studies in cardiac ischemia-reperfusion injury (I/R) are carried out in young or old animals, which does not cater to the adult age in humans who encounter I/R. Not many studies in the literature are available that emphasize the sensitivity of the adult heart to injury from the young heart, where there exist distinct alterations in DNA methylation and mitochondrial function that contribute to injury. In the present study, we utilized young (8 weeks old) and adult (24 weeks old) rat hearts to evaluate distinct DNA methylation alterations that contribute to I/R injury. The cardiac basal physiological activities in young and adult rat hearts were insignificantly changed from normal. But the DNA hypermethylation and expression level of mitochondrial genes were slightly higher in adult rat hearts. The consequential effect of these changes was measured in the I/R heart to understand its response to additional stress. Accordingly, we noted an increase in global DNA hypermethylation levels by 40% and 62% in young and adult I/R hearts, respectively, from their respective control. Subsequently, a decline in mitochondrial genes (ND1, ND4L, ND6, Cyt B, COX1, COX2, and ATP8) that regulate cardiac contractility was observed in adult I/R hearts. These changes, in turn, reduced hemodynamics (Rate pressure product) by 51% and 32% in adult and young I/R hearts, respectively, from their controls. Besides, the I/R-linked infarct size was higher in adult hearts (58%) than in young hearts (37%). Correlation analysis showed a significant negative correlation of global DNA methylation with the MT-ND1 expression (r = −0.7591), MFN2 expression (r = −0.8561) and cardiac RPP (r = −0.8015) in adult I/R hearts. Based on the above observations, we concluded that age promoted DNA methylation and deteriorated cardiac responsive ability to resist I/R injury. Frontiers Media S.A. 2022-11-15 /pmc/articles/PMC9705337/ /pubmed/36457746 http://dx.doi.org/10.3389/fgene.2022.995887 Text en Copyright © 2022 Boovarahan, Ali, AlAsmari, Alameen, Khan and Kurian. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Genetics
Boovarahan, Sri Rahavi
Ali, Nemat
AlAsmari, Abdullah F.
Alameen, Alaa Alnoor
Khan, Rehan
Kurian, Gino A.
Age-associated global DNA hypermethylation augments the sensitivity of hearts towards ischemia-reperfusion injury
title Age-associated global DNA hypermethylation augments the sensitivity of hearts towards ischemia-reperfusion injury
title_full Age-associated global DNA hypermethylation augments the sensitivity of hearts towards ischemia-reperfusion injury
title_fullStr Age-associated global DNA hypermethylation augments the sensitivity of hearts towards ischemia-reperfusion injury
title_full_unstemmed Age-associated global DNA hypermethylation augments the sensitivity of hearts towards ischemia-reperfusion injury
title_short Age-associated global DNA hypermethylation augments the sensitivity of hearts towards ischemia-reperfusion injury
title_sort age-associated global dna hypermethylation augments the sensitivity of hearts towards ischemia-reperfusion injury
topic Genetics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9705337/
https://www.ncbi.nlm.nih.gov/pubmed/36457746
http://dx.doi.org/10.3389/fgene.2022.995887
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