Protective Roles of Interferon‐γ in Cardiac Hypertrophy Induced by Sustained Pressure Overload
BackgroundA clear understanding of the molecular mechanisms underlying hemodynamic stress‐initiated cardiac hypertrophy is important for preventing heart failure. Interferon‐γ (IFN‐γ) has been suggested to play crucial roles in various diseases other than immunological disorders by modulating the ex...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-03-01
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| Series: | Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease |
| Subjects: | |
| Online Access: | https://www.ahajournals.org/doi/10.1161/JAHA.117.008145 |
| _version_ | 1818775945115336704 |
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| author | Akihiko Kimura Yuko Ishida Machi Furuta Mizuho Nosaka Yumi Kuninaka Akira Taruya Naofumi Mukaida Toshikazu Kondo |
| author_facet | Akihiko Kimura Yuko Ishida Machi Furuta Mizuho Nosaka Yumi Kuninaka Akira Taruya Naofumi Mukaida Toshikazu Kondo |
| author_sort | Akihiko Kimura |
| collection | DOAJ |
| description | BackgroundA clear understanding of the molecular mechanisms underlying hemodynamic stress‐initiated cardiac hypertrophy is important for preventing heart failure. Interferon‐γ (IFN‐γ) has been suggested to play crucial roles in various diseases other than immunological disorders by modulating the expression of myriad genes. However, the involvement of IFN‐γ in the pathogenesis of cardiac hypertrophy still remains unclear. Methods and ResultsIn order to elucidate the roles of IFN‐γ in pressure overload–induced cardiac pathology, we subjected Balb/c wild‐type (WT) or IFN‐γ‐deficient (Ifng−/−) mice to transverse aortic constriction (TAC). Three weeks after TAC, Ifng−/− mice developed more severe cardiac hypertrophy, fibrosis, and dysfunction than WT mice. Bone marrow–derived immune cells including macrophages were a source of IFN‐γ in hearts after TAC. The activation of PI3K/Akt signaling, a key signaling pathway in compensatory hypertrophy, was detected 3 days after TAC in the left ventricles of WT mice and was markedly attenuated in Ifng−/− mice. The administration of a neutralizing anti‐IFN‐γ antibody abrogated PI3K/Akt signal activation in WT mice during compensatory hypertrophy, while that of IFN‐γ activated PI3K/Akt signaling in Ifng−/− mice. TAC also induced the phosphorylation of Stat5, but not Stat1 in the left ventricles of WT mice 3 days after TAC. Furthermore, IFN‐γ induced Stat5 and Akt phosphorylation in rat cardiomyocytes cultured under stretch conditions. A Stat5 inhibitor significantly suppressed PI3K/Akt signaling activation in the left ventricles of WT mice, and aggravated pressure overload–induced cardiac hypertrophy. ConclusionsThe IFN‐γ/Stat5 axis may be protective against persistent pressure overload–induced cardiac hypertrophy by activating the PI3K/Akt pathway. |
| first_indexed | 2024-12-18T11:05:06Z |
| format | Article |
| id | doaj.art-8e45ccdc69f543a9b5fb561fe625fff1 |
| institution | Directory Open Access Journal |
| issn | 2047-9980 |
| language | English |
| last_indexed | 2024-12-18T11:05:06Z |
| publishDate | 2018-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease |
| spelling | doaj.art-8e45ccdc69f543a9b5fb561fe625fff12022-12-21T21:10:08ZengWileyJournal of the American Heart Association: Cardiovascular and Cerebrovascular Disease2047-99802018-03-017610.1161/JAHA.117.008145Protective Roles of Interferon‐γ in Cardiac Hypertrophy Induced by Sustained Pressure OverloadAkihiko Kimura0Yuko Ishida1Machi Furuta2Mizuho Nosaka3Yumi Kuninaka4Akira Taruya5Naofumi Mukaida6Toshikazu Kondo7Department of Forensic Medicine, Wakayama Medical University, Wakayama, JapanDepartment of Forensic Medicine, Wakayama Medical University, Wakayama, JapanDepartment of Clinical Laboratory Medicine, Wakayama Medical University, Wakayama, JapanDepartment of Forensic Medicine, Wakayama Medical University, Wakayama, JapanDepartment of Forensic Medicine, Wakayama Medical University, Wakayama, JapanDepartment of Cardiovascular Medicine, Wakayama Medical University, Wakayama, JapanDivision of Molecular Bioregulation, Cancer Research Institute Kanazawa University, Kanazawa, JapanDepartment of Forensic Medicine, Wakayama Medical University, Wakayama, JapanBackgroundA clear understanding of the molecular mechanisms underlying hemodynamic stress‐initiated cardiac hypertrophy is important for preventing heart failure. Interferon‐γ (IFN‐γ) has been suggested to play crucial roles in various diseases other than immunological disorders by modulating the expression of myriad genes. However, the involvement of IFN‐γ in the pathogenesis of cardiac hypertrophy still remains unclear. Methods and ResultsIn order to elucidate the roles of IFN‐γ in pressure overload–induced cardiac pathology, we subjected Balb/c wild‐type (WT) or IFN‐γ‐deficient (Ifng−/−) mice to transverse aortic constriction (TAC). Three weeks after TAC, Ifng−/− mice developed more severe cardiac hypertrophy, fibrosis, and dysfunction than WT mice. Bone marrow–derived immune cells including macrophages were a source of IFN‐γ in hearts after TAC. The activation of PI3K/Akt signaling, a key signaling pathway in compensatory hypertrophy, was detected 3 days after TAC in the left ventricles of WT mice and was markedly attenuated in Ifng−/− mice. The administration of a neutralizing anti‐IFN‐γ antibody abrogated PI3K/Akt signal activation in WT mice during compensatory hypertrophy, while that of IFN‐γ activated PI3K/Akt signaling in Ifng−/− mice. TAC also induced the phosphorylation of Stat5, but not Stat1 in the left ventricles of WT mice 3 days after TAC. Furthermore, IFN‐γ induced Stat5 and Akt phosphorylation in rat cardiomyocytes cultured under stretch conditions. A Stat5 inhibitor significantly suppressed PI3K/Akt signaling activation in the left ventricles of WT mice, and aggravated pressure overload–induced cardiac hypertrophy. ConclusionsThe IFN‐γ/Stat5 axis may be protective against persistent pressure overload–induced cardiac hypertrophy by activating the PI3K/Akt pathway.https://www.ahajournals.org/doi/10.1161/JAHA.117.008145cell signalingcytokinehypertrophyinterferon‐γPI3K/Aktprotein kinase B |
| spellingShingle | Akihiko Kimura Yuko Ishida Machi Furuta Mizuho Nosaka Yumi Kuninaka Akira Taruya Naofumi Mukaida Toshikazu Kondo Protective Roles of Interferon‐γ in Cardiac Hypertrophy Induced by Sustained Pressure Overload Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease cell signaling cytokine hypertrophy interferon‐γ PI3K/Akt protein kinase B |
| title | Protective Roles of Interferon‐γ in Cardiac Hypertrophy Induced by Sustained Pressure Overload |
| title_full | Protective Roles of Interferon‐γ in Cardiac Hypertrophy Induced by Sustained Pressure Overload |
| title_fullStr | Protective Roles of Interferon‐γ in Cardiac Hypertrophy Induced by Sustained Pressure Overload |
| title_full_unstemmed | Protective Roles of Interferon‐γ in Cardiac Hypertrophy Induced by Sustained Pressure Overload |
| title_short | Protective Roles of Interferon‐γ in Cardiac Hypertrophy Induced by Sustained Pressure Overload |
| title_sort | protective roles of interferon γ in cardiac hypertrophy induced by sustained pressure overload |
| topic | cell signaling cytokine hypertrophy interferon‐γ PI3K/Akt protein kinase B |
| url | https://www.ahajournals.org/doi/10.1161/JAHA.117.008145 |
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