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Deletion of CXCR4 in cardiomyocytes exacerbates cardiac dysfunction following isoproterenol administration

Altered alpha- and beta-adrenergic receptor signaling is associated with cardiac hypertrophy and failure. Stromal cell-derived factor-1α (SDF-1α) and its cognate receptor CXCR4 have been reported to mediate cardioprotection after injury through the mobilization of stem cells into injured tissue. How...

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Autores principales: Wang, ER, Jarrah, AA, Benard, L, Chen, J, Schwarzkopf, M, Hadri, L, Tarzami, ST
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4016112/
https://www.ncbi.nlm.nih.gov/pubmed/24646609
http://dx.doi.org/10.1038/gt.2014.23
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author Wang, ER
Jarrah, AA
Benard, L
Chen, J
Schwarzkopf, M
Hadri, L
Tarzami, ST
author_facet Wang, ER
Jarrah, AA
Benard, L
Chen, J
Schwarzkopf, M
Hadri, L
Tarzami, ST
author_sort Wang, ER
collection PubMed
description Altered alpha- and beta-adrenergic receptor signaling is associated with cardiac hypertrophy and failure. Stromal cell-derived factor-1α (SDF-1α) and its cognate receptor CXCR4 have been reported to mediate cardioprotection after injury through the mobilization of stem cells into injured tissue. However, little is known regarding whether SDF-1/CXCR4 induces acute protection following pathological hypertrophy and if so, by what molecular mechanism. We have previously reported that CXCR4 physically interacts with the beta-2 adrenergic receptor and modulates its down stream signaling. Here we have shown that CXCR4 expression prevents beta-adrenergic receptor induced hypertrophy. Cardiac beta-adrenergic receptors were stimulated with the implantation of a subcutaneous osmotic pump administrating isoproterenol and CXCR4 expression was selectively abrogated in cardiomyocytes using Cre-loxP-mediated gene recombination. CXCR4 knockout mice showed worsened fractional shortening and ejection fraction. CXCR4 ablation increased susceptibility to isoproterenol-induced heart failure, by upregulating apoptotic markers and reducing mitochondrial function; cardiac function decreases while fibrosis increases. Additionally, CXCR4 expression was rescued with the use of cardiotropic Adeno-associated viral-9 (AAV9) vectors. CXCR4 gene transfer reduced cardiac apoptotic signaling, improved mitochondrial function and resulted in a recovered cardiac function. Our results represent the first evidence that SDF-1/CXCR4 signaling mediates acute cardioprotection through modulating beta-adrenergic receptor signaling in vivo.
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spelling pubmed-40161122014-11-01 Deletion of CXCR4 in cardiomyocytes exacerbates cardiac dysfunction following isoproterenol administration Wang, ER Jarrah, AA Benard, L Chen, J Schwarzkopf, M Hadri, L Tarzami, ST Gene Ther Article Altered alpha- and beta-adrenergic receptor signaling is associated with cardiac hypertrophy and failure. Stromal cell-derived factor-1α (SDF-1α) and its cognate receptor CXCR4 have been reported to mediate cardioprotection after injury through the mobilization of stem cells into injured tissue. However, little is known regarding whether SDF-1/CXCR4 induces acute protection following pathological hypertrophy and if so, by what molecular mechanism. We have previously reported that CXCR4 physically interacts with the beta-2 adrenergic receptor and modulates its down stream signaling. Here we have shown that CXCR4 expression prevents beta-adrenergic receptor induced hypertrophy. Cardiac beta-adrenergic receptors were stimulated with the implantation of a subcutaneous osmotic pump administrating isoproterenol and CXCR4 expression was selectively abrogated in cardiomyocytes using Cre-loxP-mediated gene recombination. CXCR4 knockout mice showed worsened fractional shortening and ejection fraction. CXCR4 ablation increased susceptibility to isoproterenol-induced heart failure, by upregulating apoptotic markers and reducing mitochondrial function; cardiac function decreases while fibrosis increases. Additionally, CXCR4 expression was rescued with the use of cardiotropic Adeno-associated viral-9 (AAV9) vectors. CXCR4 gene transfer reduced cardiac apoptotic signaling, improved mitochondrial function and resulted in a recovered cardiac function. Our results represent the first evidence that SDF-1/CXCR4 signaling mediates acute cardioprotection through modulating beta-adrenergic receptor signaling in vivo. 2014-03-20 2014-05 /pmc/articles/PMC4016112/ /pubmed/24646609 http://dx.doi.org/10.1038/gt.2014.23 Text en http://www.nature.com/authors/editorial_policies/license.html#terms Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:http://www.nature.com/authors/editorial_policies/license.html#terms
spellingShingle Article
Wang, ER
Jarrah, AA
Benard, L
Chen, J
Schwarzkopf, M
Hadri, L
Tarzami, ST
Deletion of CXCR4 in cardiomyocytes exacerbates cardiac dysfunction following isoproterenol administration
title Deletion of CXCR4 in cardiomyocytes exacerbates cardiac dysfunction following isoproterenol administration
title_full Deletion of CXCR4 in cardiomyocytes exacerbates cardiac dysfunction following isoproterenol administration
title_fullStr Deletion of CXCR4 in cardiomyocytes exacerbates cardiac dysfunction following isoproterenol administration
title_full_unstemmed Deletion of CXCR4 in cardiomyocytes exacerbates cardiac dysfunction following isoproterenol administration
title_short Deletion of CXCR4 in cardiomyocytes exacerbates cardiac dysfunction following isoproterenol administration
title_sort deletion of cxcr4 in cardiomyocytes exacerbates cardiac dysfunction following isoproterenol administration
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4016112/
https://www.ncbi.nlm.nih.gov/pubmed/24646609
http://dx.doi.org/10.1038/gt.2014.23
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