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Liu SB, Meng XM, Li YM, Wang JM, Guo HH, Wang C, Zhu BM. Histone methyltransferase KMT2D contributes to the protection of myocardial ischemic injury. Front Cell Dev Biol 2022; 10:946484. [PMID: 35938163 PMCID: PMC9354747 DOI: 10.3389/fcell.2022.946484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 06/30/2022] [Indexed: 11/25/2022] Open
Abstract
Histone H3 lysine 4 (H3K4) methyltransferase 2D (KMT2D) plays an important role in cell development in early life. However, the function of KMT2D in adult cells such as cardiomyocytes or neurons has not been reported. In this study, cardiomyocyte-specific KMT2D knockout (KMT2D-cKO) and control (KMT2D-Ctl) mice were exposed to sham or myocardial ischemia (MI) surgery. Depletion of KMT2D aggravated the ischemic area, led to the increased mortality (26.5% in KMT2D-cKO vs 12.5% in KMT2D-Ctl) of the mice, and weakened the left ventricular systolic function. RNA-seq analysis in cardiac tissues identified genes whose expression was changed by MI and KMT2D deletion. Combined with the genome-wide association study (GWAS) analysis, cardiac disease-associated genes Rasd1, Thsd7a, Ednra, and Tns1 were identified. The expression of the Rasd1 was significantly decreased by MI or the loss of KMT2D in vivo. Meanwhile, ChIP assays demonstrated that either MI or loss of KMT2D attenuated monomethylated H3K4 (H3K4me1) enrichment on the enhancer of Rasd1. By generating a KMT2D knockout (H9C2-KO) H9C2 monoclone, we verified that the expression of Rasd1 was controlled by KMT2D, and the expression of Rasd1 was decreased by serum starvation but not low-(O2) treatment in H9C2 cells. KMT2D has a protective effect on ischemic myocardium by regulating cardiac disease-associated genes including Rasd1. KMT2D is required for the H3K4me1 deposition on the enhancer of Rasd1. Our data for the first time suggest that KMT2D-mediated Rasd1 expression may play an important protective effect on adult cells during nutritional deficiency caused by ischemic injury.
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Affiliation(s)
- Shu-Bao Liu
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xiang-Min Meng
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yu-Meng Li
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jun-Meng Wang
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Hui-Hui Guo
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Chaochen Wang
- Zhejiang University-University of Edinburgh Institute, International Campus, Zhejiang University, Haining, Zhejiang, China
- *Correspondence: Bing-Mei Zhu, ; Chaochen Wang,
| | - Bing-Mei Zhu
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- *Correspondence: Bing-Mei Zhu, ; Chaochen Wang,
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Benes J, Tomankova H, Novakova M, Rohan Z, Kvetnansky R, Myslivecek J. Corticotropin-releasing hormone affects short immobilization stress-induced changes in lung cytosolic and membrane glucocorticoid binding sites. Cell Mol Neurobiol 2013; 33:503-11. [PMID: 23430272 DOI: 10.1007/s10571-013-9916-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 02/06/2013] [Indexed: 12/22/2022]
Abstract
Glucocorticoids act via glucocorticoid receptors (GR), typically localized in the cytosol (cGR). Rapid action is probably mediated via membrane receptors (mGR). In corticotropin-releasing hormone knockouts (CRH-KO), basal plasma glucocorticoid levels do differ from wild type levels (WT), but are approximately ten times lower during exposure to immobilization stress (IMMO) in comparison to WT. We tested the following hypotheses: (1) the mice lung tissue GR basal numbers would not be changed in CRH-KO (because of similar glucocorticoid levels), (2) the number of GR would be changed in WT but not in KO during short (30, 90, and 120 min) IMMO (because of higher increase of glucocorticoid levels in WT). The basal levels of cGR were not changed in CRH-KO (compared to WT), while mGR were significantly lower (62 %) in CRH-KO. In WT, there was the only decrease (to 32 %) in cGR after 120 min when we also found an increase in mGR in WT (to 201 %). In CRH-KO, IMMO caused gradual decrease in cGR (to 52 % after 30 min, to 46 % after 90 min, and to 32 % after 120 min). In CRH-KO, the only increase in mGR appeared already at 30 min of IMMO. These data suggest, on the contrary to our hypotheses, that CRH-KO are more susceptible to GR changes in early phases of stress.
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Affiliation(s)
- Jan Benes
- Institute of Physiology, 1st Faculty of Medicine, Charles University, Albertov 5, 12800 Prague, Czech Republic
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Weyts FA, Flik G, Verburg-van Kemenade BM. Cortisol inhibits apoptosis in carp neutrophilic granulocytes. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 1998; 22:563-572. [PMID: 9877437 DOI: 10.1016/s0145-305x(98)00027-5] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The direct effect of cortisol treatment on carp neutrophil viability was examined in vitro. Cortisol treatment caused an inhibition of neutrophil apoptosis. The effect was blocked by glucocorticoid receptor blocker RU486, showing that rescue from apoptosis was receptor mediated. Using binding studies with radioactive cortisol, a single class of glucocorticoid receptors was detected with high affinity (Kd = 2.6 nM) and low capacity (497 receptors/cell) for cortisol binding. Both in vitro and in vivo cortisol treatment did not affect neutrophil respiratory burst activity. These data indicate that cortisol can augment the supply of functional neutrophilic granulocytes in conditions of acute stress, which may be essential for survival, since phagocytes form the first line of defence against micro-organisms.
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Affiliation(s)
- F A Weyts
- Department of Animal Sciences, Agricultural University, Wageningen, The Netherlands
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Weyts FA, Verburg-van Kemenade BM, Flik G. Characterisation of glucocorticoid receptors in peripheral blood leukocytes of Carp, Cyprinus carpio L. Gen Comp Endocrinol 1998; 111:1-8. [PMID: 9653016 DOI: 10.1006/gcen.1998.7080] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Binding studies with [3H]cortisol revealed the presence of a single class of cortisol-binding sites on carp peripheral blood leukocytes (PBL). These binding sites showed high affinity (Kd of 3.8 nM) and low capacity (490 binding sites per cell), indicative of receptor binding. Affinity for cortisone was 254-fold lower than for cortisol. Affinity for the two synthetic glucocorticoids dexamethasone and triamcinolone acetonide (TA) was 4- and 10-fold higher than for cortisol, respectively. Further evidence for the GR character of the receptor came from results showing that cortisol induced apoptosis, which could be blocked by the glucocorticoid analogue RU486. A single meal of cortisol-containing food elevated plasma cortisol concentrations and decreased GR density in PBL, as measured 3 h later. The percentage of circulating B lymphocytes also decreased. Cortisol-induced redistribution of B lymphocytes from the blood, due to cortisol treatment, may explain the decrease of GR numbers in PBL, although downregulation of available GR remains possible.
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Affiliation(s)
- F A Weyts
- Cell Biology and Immunology Laboratory, Wageningen Institute of Animal Sciences, Agricultural University, The Netherlands
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