1
|
Jeong A, Lim Y, Kook T, Kwon DH, Cho YK, Ryu J, Lee YG, Shin S, Choe N, Kim YS, Cho HJ, Kim JC, Choi Y, Lee SJ, Kim HS, Kee HJ, Nam KI, Ahn Y, Jeong MH, Park WJ, Kim YK, Kook H. Circular RNA circSMAD4 regulates cardiac fibrosis by targeting miR-671-5p and FGFR2 in cardiac fibroblasts. Mol Ther Nucleic Acids 2023; 34:102071. [PMID: 38046397 PMCID: PMC10690640 DOI: 10.1016/j.omtn.2023.102071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 10/31/2023] [Indexed: 12/05/2023]
Abstract
Heart failure is a leading cause of death and is often accompanied by activation of quiescent cardiac myofibroblasts, which results in cardiac fibrosis. In this study, we aimed to identify novel circular RNAs that regulate cardiac fibrosis. We applied transverse aortic constriction (TAC) for 1, 4, and 8 weeks in mice. RNA sequencing datasets were obtained from cardiac fibroblasts isolated by use of a Langendorff apparatus and then further processed by use of selection criteria such as differential expression and conservation in species. CircSMAD4 was upregulated by TAC in mice or by transforming growth factor (TGF)-β1 in primarily cultured human cardiac fibroblasts. Delivery of si-circSMAD4 attenuated myofibroblast activation and cardiac fibrosis in mice treated with isoproterenol (ISP). si-circSmad4 significantly reduced cardiac fibrosis and remodeling at 8 weeks. Mechanistically, circSMAD4 acted as a sponge against the microRNA miR-671-5p in a sequence-specific manner. miR-671-5p was downregulated during myofibroblast activation and its mimic form attenuated cardiac fibrosis. miR-671-5p mimic destabilized fibroblast growth factor receptor 2 (FGFR2) mRNA in a sequence-specific manner and interfered with the fibrotic action of FGFR2. The circSMAD4-miR-671-5p-FGFR2 pathway is involved in the differentiation of cardiac myofibroblasts and thereby the development of cardiac fibrosis.
Collapse
Affiliation(s)
- Anna Jeong
- Chonnam University Research Institute of Medical Sciences, Hwasun, Jeollanamdo 58128, Republic of Korea
- BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun, Jeollanamdo 58128, Republic of Korea
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Yongwoon Lim
- Chonnam University Research Institute of Medical Sciences, Hwasun, Jeollanamdo 58128, Republic of Korea
- BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun, Jeollanamdo 58128, Republic of Korea
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Taewon Kook
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- College of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Duk-Hwa Kwon
- Chonnam University Research Institute of Medical Sciences, Hwasun, Jeollanamdo 58128, Republic of Korea
- BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun, Jeollanamdo 58128, Republic of Korea
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Young Kuk Cho
- Department of Pediatrics, Chosun University School of Medicine, Gwangju, Republic of Korea
| | - Juhee Ryu
- Collage of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Yun-Gyeong Lee
- Chonnam University Research Institute of Medical Sciences, Hwasun, Jeollanamdo 58128, Republic of Korea
- BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun, Jeollanamdo 58128, Republic of Korea
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Sera Shin
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Nakwon Choe
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Yong Sook Kim
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Cardiology, Heart Research Center, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Hye Jung Cho
- Chonnam University Research Institute of Medical Sciences, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Anatomy, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Jeong Chul Kim
- Department of Surgery, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Yoonjoo Choi
- Combinatorial Tumor Immunotherapy Medical Research Center, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Su-Jin Lee
- Biomedical Research Institute, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Hyung-Seok Kim
- Chonnam University Research Institute of Medical Sciences, Hwasun, Jeollanamdo 58128, Republic of Korea
- BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Forensic Medicine, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Hae Jin Kee
- Department of Cardiology, Heart Research Center, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Kwang-Il Nam
- Chonnam University Research Institute of Medical Sciences, Hwasun, Jeollanamdo 58128, Republic of Korea
- BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Anatomy, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Youngkeun Ahn
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Cardiology, Heart Research Center, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Myung Ho Jeong
- Department of Cardiology, Heart Research Center, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Woo Jin Park
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- College of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Young-Kook Kim
- Chonnam University Research Institute of Medical Sciences, Hwasun, Jeollanamdo 58128, Republic of Korea
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Biochemistry, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| | - Hyun Kook
- Chonnam University Research Institute of Medical Sciences, Hwasun, Jeollanamdo 58128, Republic of Korea
- BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun, Jeollanamdo 58128, Republic of Korea
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo 58128, Republic of Korea
| |
Collapse
|
2
|
Kwon DH, Choe N, Shin S, Ryu J, Lee Y, Jeong A, Lee YG, Kim EM, Kim YK, Kook H. Regulation of MDM2 E3 ligase-dependent vascular calcification by Msx1/2. Atherosclerosis 2022. [DOI: 10.1016/j.atherosclerosis.2022.06.308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
3
|
Ryu J, Choe N, Kwon DH, Shin S, Lim YH, Yoon G, Kim JH, Kim HS, Lee IK, Ahn Y, Park WJ, Kook H, Kim YK. Circular RNA circSmoc1-2 regulates vascular calcification by acting as a miR-874-3p sponge in vascular smooth muscle cells. Mol Ther Nucleic Acids 2022; 27:645-655. [PMID: 35036071 PMCID: PMC8752879 DOI: 10.1016/j.omtn.2021.12.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 12/20/2021] [Indexed: 12/19/2022]
Abstract
Vascular calcification (VC), or calcium deposition inside the blood vessels, is common in patients with atherosclerosis, cardiovascular disease, and chronic kidney disease. Although several treatments are available to reduce calcification, the incidence of VC continues to rise. Recently, there have been several reports describing the regulation of circular RNAs (circRNAs) in various diseases. However, the role of circRNAs in VC has not yet been fully explored. Here, we investigated the function of circSmoc1-2, one of the circRNAs generated from the Smoc1 gene, which is downregulated in response to VC. CircSmoc1-2 is localized primarily to the cytoplasm and is resistant to exonuclease digestion. Inhibition of circSmoc1-2 worsens VC, while overexpression of circSmoc1-2 reduces VC, suggesting that circSmoc1-2 can prevent calcification. We went on to investigate the mechanism of circSmoc1-2 as a microRNA sponge and noted that miR-874-3p, the predicted target of circSmoc1-2, promotes VC, while overexpression of circSmoc1-2 reduces VC by suppressing miR-874-3p. Additionally, we identified the potential mRNA target of miR-874-3p as Adam19. In conclusion, we revealed that the circSmoc1-2/miR-874-3p/Adam19 axis regulates VC, suggesting that circSmoc1-2 may be a novel therapeutic target in the treatment of VC.
Collapse
Affiliation(s)
- Juhee Ryu
- Chonnam University Research Institute of Medical Sciences, Jeollanam-do, Republic of Korea
- The BK21 FOUR Center for Glocal Future Biomedical Scientists at Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Department of Biochemistry, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Nakwon Choe
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Duk-Hwa Kwon
- The BK21 FOUR Center for Glocal Future Biomedical Scientists at Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Sera Shin
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Yeong-Hwan Lim
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Department of Biochemistry, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Gwangho Yoon
- The BK21 FOUR Center for Glocal Future Biomedical Scientists at Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Department of Biochemistry, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Ji Hye Kim
- Chonnam National University Hwasun Hospital Biomedical Research Institute, Jeollanam-do, Republic of Korea
| | - Hyung Seok Kim
- Department of Forensic Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - In-Kyu Lee
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Youngkeun Ahn
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Department of Cardiology, Cardiovascular Center, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Woo Jin Park
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- College of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Hyun Kook
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Young-Kook Kim
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
- Department of Biochemistry, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| |
Collapse
|
4
|
Choe N, Kwon DH, Ryu J, Shin S, Cho HJ, Joung H, Eom GH, Ahn Y, Park WJ, Nam KI, Kim YK, Kook H. miR-27a-3p Targets ATF3 to Reduce Calcium Deposition in Vascular Smooth Muscle Cells. Mol Ther Nucleic Acids 2020; 22:627-639. [PMID: 33230462 PMCID: PMC7578555 DOI: 10.1016/j.omtn.2020.09.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 09/23/2020] [Indexed: 01/16/2023]
Abstract
Vascular calcification, the ectopic deposition of calcium in blood vessels, develops in association with various metabolic diseases and atherosclerosis and is an independent predictor of morbidity and mortality associated with these diseases. Herein, we report that reduction of microRNA-27a-3p (miR-27a-3p) causes an increase in activating transcription factor 3 (ATF3), a novel osteogenic transcription factor, in vascular smooth muscle cells. Both microRNA (miRNA) and mRNA microarrays were performed with rat vascular smooth muscle cells, and reciprocally regulated pairs of miRNA and mRNA were selected after bioinformatics analysis. Inorganic phosphate significantly reduced the expression of miR-27a-3p in A10 cells. The transcript level was also reduced in vitamin D3-administered mouse aortas. miR-27a-3p mimic reduced calcium deposition, whereas miR-27a-3p inhibitor increased it. The Atf3 mRNA level was upregulated in a cellular vascular calcification model, and miR-27a-3p reduced the Atf3 mRNA and protein levels. Transfection with Atf3 could recover the miR-27a-3p-induced reduction of calcium deposition. Our results suggest that reduction of miR-27a-3p may contribute to the development of vascular calcification by de-repression of ATF3.
Collapse
Affiliation(s)
- Nakwon Choe
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea
| | - Duk-Hwa Kwon
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea
| | - Juhee Ryu
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea.,Department of Biochemistry, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea
| | - Sera Shin
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea
| | - Hye Jung Cho
- Department of Anatomy, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea
| | - Hosouk Joung
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea
| | - Gwang Hyeon Eom
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea
| | - Youngkeun Ahn
- Department of Cardiology, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Woo Jin Park
- College of Life Sciences, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Kwang-Il Nam
- Department of Anatomy, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea
| | - Young-Kook Kim
- Department of Biochemistry, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea
| | - Hyun Kook
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanamdo, Republic of Korea
| |
Collapse
|
5
|
Choe N, Shin S, Joung H, Ryu J, Kim YK, Ahn Y, Kook H, Kwon DH. The microRNA miR-134-5p induces calcium deposition by inhibiting histone deacetylase 5 in vascular smooth muscle cells. J Cell Mol Med 2020; 24:10542-10550. [PMID: 32783377 PMCID: PMC7521311 DOI: 10.1111/jcmm.15670] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 06/30/2020] [Accepted: 07/03/2020] [Indexed: 12/30/2022] Open
Abstract
Calcium deposition in vascular smooth muscle cells (VSMCs) is a form of ectopic ossification in blood vessels. It can result in rigidity of the vasculature and an increase in cardiac events. Here, we report that the microRNA miR‐134‐5p potentiates inorganic phosphate (Pi)‐induced calcium deposition in VSMCs by inhibiting histone deacetylase 5 (HDAC5). Using miRNA microarray analysis of Pi‐treated rat VSMCs, we first selected miR‐134‐5p for further evaluation. Quantitative RT‐PCR confirmed that miR‐134‐5p was increased in Pi‐treated A10 cells, a rat VSMC line. Transfection of miR‐134‐5p mimic potentiated the Pi‐induced increase in calcium contents. miR‐134‐5p increased the amounts of bone runt‐related transcription factor 2 (RUNX2) protein and bone morphogenic protein 2 (BMP2) mRNA in the presence of Pi but decreased the expression of osteoprotegerin (OPG). Bioinformatic analysis showed that the HDAC5 3′untranslated region (3′UTR) was one of the targets of miR‐134‐5p. The luciferase construct containing the 3′UTR of HDAC5 was down‐regulated by miR‐134‐5p mimic in a dose‐dependent manner in VSMCs. Overexpression of HDAC5 mitigated the calcium deposition induced by miR‐134‐5p. Our results suggest that a Pi‐induced increase of miR‐134‐5p may cause vascular calcification through repression of HDAC5.
Collapse
Affiliation(s)
- Nakwon Choe
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Republic of Korea
| | - Sera Shin
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Republic of Korea
| | - Hosouk Joung
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Republic of Korea
| | - Juhee Ryu
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Republic of Korea
| | - Young-Kook Kim
- Department of Biochemistry, Chonnam National University Medical School, Hwasun, Republic of Korea
| | - Youngkeun Ahn
- Department of Cardiology, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Hyun Kook
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Republic of Korea
| | - Duk-Hwa Kwon
- Department of Pharmacology, Chonnam National University Medical School, Hwasun, Republic of Korea
| |
Collapse
|
6
|
Choe N, SHIN SERA, Joung H, Ryu J, Kim YK, Ahn Y, Kwon DH, Kook H. Abstract 296: The MicroRNA
-134-5p
Induces Calcium Deposition by Inhibiting Hdac5 in Vascular Smooth Muscle Cells. Circ Res 2020. [DOI: 10.1161/res.127.suppl_1.296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Calcium deposition in vascular smooth muscle cells (VSMCs) is a form of ectopic ossification in blood vessels. It can result in rigidity of the vasculature and an increase in cardiac events. Here, we report that the microRNA-134-5p (
miR-134-5p)
potentiates inorganic phosphate (Pi)-induced calcium deposition in VSMCs by inhibiting histone deacetylase 5 (HDAC5). Using miRNA microarray analysis of Pi-treated rat VSMCs, we first selected
miR-134-5p
for further evaluation. Quantitative RT-PCR confirmed that
miR-134-5p
was increased in Pi-treated A10 cells, a rat VSMC line. Transfection of
miR-134-5p
mimic potentiated the Pi-induced increase in calcium contents.
miR-134-5p
increased the amounts of bone runt-related transcription factor 2 (RUNX2) protein and bone morphogenic protein (BMP2) mRNA in the presence of Pi but decreased the expression of osteoprotegerin (OPG). Bioinformatic analysis showed that the HDAC5 5’UTR was one of the targets of
miR-134-5p
. Hdac5 expression was downregulated by
miR-134-5p
mimic in an
Hdac5
5’UTR-dependent manner. Overexpression of
Hdac5
mitigated the calcium deposition induced by
miR-134-5p
. Our results suggest that a Pi-induced increase of
miR-134-5p
may cause vascular calcification through repression of HDAC5.
Collapse
Affiliation(s)
| | - SERA SHIN
- chonnam national university, Gwangju
| | - Hosouk Joung
- Chonnam Natl Univ Med Sch, Hwasun-gun Jeollanamdo, Korea, Republic of
| | - Juhee Ryu
- Chonnam Natl Univ Med Sch, Hwasun-gun Jeollanamdo, Korea, Republic of
| | | | | | | | - Hyun Kook
- Chonnam Natl Univ Med Sch, Hwasun-gun Jeollanamdo, Korea, Republic of
| |
Collapse
|
7
|
Ryu J, Kwon DH, Choe N, Shin S, Jeong G, Lim YH, Kim J, Park WJ, Kook H, Kim YK. Characterization of Circular RNAs in Vascular Smooth Muscle Cells with Vascular Calcification. Mol Ther Nucleic Acids 2019; 19:31-41. [PMID: 31790973 PMCID: PMC6909180 DOI: 10.1016/j.omtn.2019.11.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 10/09/2019] [Accepted: 11/05/2019] [Indexed: 02/06/2023]
Abstract
Circular RNAs (circRNAs) are generally formed by back splicing and are expressed in various cells. Vascular calcification (VC), a common complication of chronic kidney disease (CKD), is often associated with cardiovascular disease. The relationship between circRNAs and VC has not yet been studied. Inorganic phosphate (Pi) was used to treat rat vascular smooth muscle cells to induce VC. circRNAs were identified by analyzing RNA sequencing (RNA-seq) data, and their expression change during VC was validated. The selected circRNAs, including circSamd4a, circSmoc1-1, circMettl9, and circUxs1, were resistant to RNase R digestion and mostly localized in the cytoplasm. While silencing circSamd4a promoted VC, overexpressing it reduced VC in calcium assay and Alizarin red S (ARS) staining. In addition, microRNA (miRNA) microarray, luciferase reporter assay, and calcium assay suggested that circSamd4a could act as a miRNA suppressor. Our data show that circSamd4a has an anti-calcification role by functioning as a miRNA sponge. Moreover, mRNAs that can interact with miRNAs were predicted from RNA-seq and bioinformatics analysis, and the circSamd4a-miRNA-mRNA axis involved in VC was verified by luciferase reporter assay and calcium assay. Since circSamd4a is conserved in humans, it can serve as a novel therapeutic target in resolving VC.
Collapse
Affiliation(s)
- Juhee Ryu
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea; Department of Biomedical Sciences, Center for Creative Biomedical Scientists at Chonnam National University, Jeollanam-do, Republic of Korea; Department of Biochemistry, Chonnam National University Medical School, Jeollanam-do, Republic of Korea; Department of Pharmacology, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Duk-Hwa Kwon
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea; Department of Pharmacology, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Nakwon Choe
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea; Department of Pharmacology, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Sera Shin
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea; Department of Pharmacology, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Geon Jeong
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea; Department of Biomedical Sciences, Center for Creative Biomedical Scientists at Chonnam National University, Jeollanam-do, Republic of Korea; Department of Biochemistry, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Yeong-Hwan Lim
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea; Department of Biomedical Sciences, Center for Creative Biomedical Scientists at Chonnam National University, Jeollanam-do, Republic of Korea; Department of Biochemistry, Chonnam National University Medical School, Jeollanam-do, Republic of Korea
| | - Jaetaek Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Chung-Ang University, Seoul, Republic of Korea
| | - Woo Jin Park
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea; College of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Hyun Kook
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea; Department of Biomedical Sciences, Center for Creative Biomedical Scientists at Chonnam National University, Jeollanam-do, Republic of Korea; Department of Pharmacology, Chonnam National University Medical School, Jeollanam-do, Republic of Korea.
| | - Young-Kook Kim
- Basic Research Laboratory for Vascular Remodeling, Chonnam National University Medical School, Jeollanam-do, Republic of Korea; Department of Biomedical Sciences, Center for Creative Biomedical Scientists at Chonnam National University, Jeollanam-do, Republic of Korea; Department of Biochemistry, Chonnam National University Medical School, Jeollanam-do, Republic of Korea.
| |
Collapse
|
8
|
Kook H, Ryu J, Jeong G, Lim YH, Kwon DH, Choe N, Shin S, Kim Y, Ahn Y, Kim YK. Abstract 325: Characterization of Circular RNAs in Vascular Smooth Muscle Cells With Vascular Calcification. Circ Res 2019. [DOI: 10.1161/res.125.suppl_1.325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Circular RNAs (circRNAs) are generally formed by back splicing, and are expressed in various cells. Vascular calcification, a common complication of chronic kidney disease, is often associated with cardiovascular disease. The relationship between circRNAs and vascular calcification has not yet been studied. Inorganic phosphate was used to treat rat vascular smooth muscle cells to induce vascular calcification. CircRNAs were identified by analyzing RNA sequencing data, and their expression change during vascular calcification was validated. The selected circRNAs, including circSamd4a, circSmoc1-1, circMettl9, and circUxs1 were resistant to RNase R digestion, and mostly localized in the cytoplasm. Silencing circSamd4a promoted vascular calcification, while overexpressing it reduced vascular calcification. In addition, microRNA (miRNA) microarray and luciferase reporter assay suggested that circSamd4a could act as miRNA suppressor. Our data shows that circSamd4a have anti-calcification roles by functioning as miRNA sponges. Since circSamd4a is conserved in humans, they can serve as novel therapeutic targets in resolving vascular calcification.
Collapse
Affiliation(s)
- Hyun Kook
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Juhee Ryu
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Geon Jeong
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Yeong-Hwan Lim
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Duk-Hwa Kwon
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Nakwon Choe
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Sera Shin
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Yongsook Kim
- Chonnam National Univ Hosp, Gwangju, Korea, Republic of
| | - Youngkeun Ahn
- Chonnam National Univ Hosp, Gwangju, Korea, Republic of
| | - Young-Kook Kim
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| |
Collapse
|
9
|
Kook H, Kwon DH, Choe N, Shin S, Joung H, Ryu J, Kim YK. Abstract 939: Mdm2 Induces Vascular Calcification Through Its E3 Ligase Activity. Circ Res 2019. [DOI: 10.1161/res.125.suppl_1.939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Rationale:
Calcium deposition to the vascular smooth muscle matrix, or vascular calcification (VC), makes vessels rigid, increasing morbidity and mortality in patients with cardiovascular and renal diseases. Previously, we suggested that histone deacetylase (HDAC) 1 prevents VC, whereas its E3 ligase, mouse double minute 2 homolog (MDM2), exaggerates VC by inducing the polyubiquitination of HDAC1.
Objective:
In the present study, we extend our results to investigate whether MDM2-induced VC is dependent on its ubiquitination activity.
Methods and Results:
Using cellular and animal models with genetically engineered mice, we observed that vascular smooth muscle cell-specific conditional knockout of Mdm2 blunted vitamin D3-induced VC. We generated both MDM2 Y489A, which lacks ubiquitination activity, and MDM2 ΔR, a RING domain-deleted truncated mutant. Compared with the activity of wild-type (WT) MDM2, the HDAC1-ubiquitination activities of both Y489A and ΔR were significantly reduced. WT MDM2 potentiated inorganic phosphate-induced VC by inducing runt-related transcription factor 2 (Runx2), whereas Y489A and ΔR failed to do so. We generated three different transgenic lines to overexpress WT, Y489A, and ΔR MDM2. TgMDM2 WT elicited calcium deposition, whereas TgMDM2 Y489A and TgMDM2 ΔR did not.
Conclusions:
Taken together, our results suggest that MDM2-induced VC is dependent on the ubiquitination activity of MDM2 to degrade HDAC1. Accordingly, blockade of MDM2 ubiquitination activity might have beneficial effects in the treatment of VC.
Collapse
Affiliation(s)
- Hyun Kook
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Duk-Hwa Kwon
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Nakwon Choe
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Sera Shin
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Hosouk Joung
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Juhee Ryu
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| | - Young-Kuk Kim
- Chonnam National Univ Med Sch, Hwasun, Korea, Republic of
| |
Collapse
|
10
|
Jeong G, Kwon DH, Shin S, Choe N, Ryu J, Lim YH, Kim J, Park WJ, Kook H, Kim YK. Long noncoding RNAs in vascular smooth muscle cells regulate vascular calcification. Sci Rep 2019; 9:5848. [PMID: 30971745 PMCID: PMC6458154 DOI: 10.1038/s41598-019-42283-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 03/27/2019] [Indexed: 01/10/2023] Open
Abstract
Vascular calcification is characterized by the accumulation of hydroxyapatite crystals, which is a result of aberrant mineral metabolism. Although many clinical studies have reported its adverse effects on cardiovascular morbidity, the molecular mechanism of vascular calcification, especially the involvement of long noncoding RNAs (lncRNAs), is not yet reported. From the transcriptomic analysis, we discovered hundreds of lncRNAs differentially expressed in rat vascular smooth muscle cells (VSMCs) treated with inorganic phosphate, which mimics vascular calcification. We focused on Lrrc75a-as1 and elucidated its transcript structure and confirmed its cytoplasmic localization. Our results showed that calcium deposition was elevated after knockdown of Lrrc75a-as1, while its overexpression inhibited calcium accumulation in A10 cells. In addition, Lrrc75a-as1 attenuated VSMCs calcification by decreasing the expression of osteoblast-related factors. These findings suggest that Lrrc75a-as1 acts as a negative regulator of vascular calcification, and may serve as a possible therapeutic target in vascular calcification.
Collapse
Affiliation(s)
- Geon Jeong
- Basic Research Laboratory for Cardiac Remodeling Research Laboratory, Chonnam National University Medical School, Jeollanam-do, Republic of Korea.,Department of Biochemistry, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea.,Center for Creative Biomedical Scientists, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea
| | - Duk-Hwa Kwon
- Basic Research Laboratory for Cardiac Remodeling Research Laboratory, Chonnam National University Medical School, Jeollanam-do, Republic of Korea.,Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea
| | - Sera Shin
- Basic Research Laboratory for Cardiac Remodeling Research Laboratory, Chonnam National University Medical School, Jeollanam-do, Republic of Korea.,Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea
| | - Nakwon Choe
- Basic Research Laboratory for Cardiac Remodeling Research Laboratory, Chonnam National University Medical School, Jeollanam-do, Republic of Korea.,Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea
| | - Juhee Ryu
- Basic Research Laboratory for Cardiac Remodeling Research Laboratory, Chonnam National University Medical School, Jeollanam-do, Republic of Korea.,Department of Biochemistry, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea.,Center for Creative Biomedical Scientists, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea.,Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea
| | - Yeong-Hwan Lim
- Basic Research Laboratory for Cardiac Remodeling Research Laboratory, Chonnam National University Medical School, Jeollanam-do, Republic of Korea.,Department of Biochemistry, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea.,Center for Creative Biomedical Scientists, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea
| | - Jaetaek Kim
- Basic Research Laboratory for Cardiac Remodeling Research Laboratory, Chonnam National University Medical School, Jeollanam-do, Republic of Korea.,Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Chung-Ang University, Seoul, Republic of Korea
| | - Woo Jin Park
- Basic Research Laboratory for Cardiac Remodeling Research Laboratory, Chonnam National University Medical School, Jeollanam-do, Republic of Korea.,College of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Hyun Kook
- Basic Research Laboratory for Cardiac Remodeling Research Laboratory, Chonnam National University Medical School, Jeollanam-do, Republic of Korea. .,Center for Creative Biomedical Scientists, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea. .,Department of Pharmacology, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea.
| | - Young-Kook Kim
- Basic Research Laboratory for Cardiac Remodeling Research Laboratory, Chonnam National University Medical School, Jeollanam-do, Republic of Korea. .,Department of Biochemistry, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea. .,Center for Creative Biomedical Scientists, Chonnam National University Medical School, Hwasun, Jeollanam-do, 58128, Republic of Korea.
| |
Collapse
|
11
|
Choe N, Kwon DH, Shin S, Kim YS, Kim YK, Kim J, Ahn Y, Eom GH, Kook H. The microRNA miR-124 inhibits vascular smooth muscle cell proliferation by targeting S100 calcium-binding protein A4 (S100A4). FEBS Lett 2017; 591:1041-1052. [PMID: 28235243 DOI: 10.1002/1873-3468.12606] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 02/08/2017] [Accepted: 02/17/2017] [Indexed: 12/21/2022]
Abstract
S100 calcium-binding protein A4 (S100A4) induces proliferation and migration of vascular smooth muscle cells (VSMCs). We aimed to find the microRNA regulating S100A4 expression. S100A4 transcripts are abruptly increased in the acute phase of carotid arterial injury 1 day later (at day 1) but gradually decreases at days 7 and 14. Bioinformatics analysis reveals that miR-124 targets S100A4. VSMC survival is attenuated by miR-124 mimic but increased by miR-124 inhibitor. miR-124 decreases immediately after carotid arterial injury but dramatically increases at days 7 and 14. miR-124 inhibitor-induced cell proliferation is blocked by S100A4 siRNA, whereas miR-124-induced cell death is recovered by S100A4. Our findings suggest that miR-124 is a novel regulator of VSMC proliferation and may play a role in the development of neointimal proliferation.
Collapse
Affiliation(s)
- Nakwon Choe
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Korea.,Basic Research Laboratory for Cardiac Remodeling, Chonnam National University Medical School, Gwangju, Korea
| | - Duk-Hwa Kwon
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Korea.,Basic Research Laboratory for Cardiac Remodeling, Chonnam National University Medical School, Gwangju, Korea
| | - Sera Shin
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Korea.,Basic Research Laboratory for Cardiac Remodeling, Chonnam National University Medical School, Gwangju, Korea
| | - Yong Sook Kim
- Department of Cardiology, Chonnam National University Hospital, Gwangju, Korea
| | - Young-Kook Kim
- Basic Research Laboratory for Cardiac Remodeling, Chonnam National University Medical School, Gwangju, Korea.,Department of Biochemistry, Chonnam National University Medical School, Gwangju, Korea
| | - Jaetaek Kim
- Basic Research Laboratory for Cardiac Remodeling, Chonnam National University Medical School, Gwangju, Korea.,Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Chung-Ang University, Seoul, Korea
| | - Youngkeun Ahn
- Department of Cardiology, Chonnam National University Hospital, Gwangju, Korea
| | - Gwang H Eom
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Korea.,Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju, Korea
| | - Hyun Kook
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Korea.,Basic Research Laboratory for Cardiac Remodeling, Chonnam National University Medical School, Gwangju, Korea
| |
Collapse
|
12
|
Kook H, Kwon D, Eom G, Shin S, Kim E, Lee Y, Choe N. MDM2 E3 ligase-mediated ubiquitination and degradation of HDAC1 in vascular calcification. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
13
|
Lee Y, Choe N, Kim E, Shin S, Kwon D, Kook T, Kook H. The role of micro RNAs and their targets in a carotid artery intimal hyperplasia. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
14
|
Joung H, Eom GH, Choe N, Lee HM, Ko JH, Kwon DH, Nam YS, Min H, Shin S, Kook J, Cho YK, Kim JC, Seo SB, Baik YH, Nam KI, Kook H. Corrigendum to “Ret finger protein mediates Pax7-induced ubiquitination of MyoD in skeletal muscle atrophy” [Cell. Signal. 26(10) (2014) 2240–2248]. Cell Signal 2015. [DOI: 10.1016/j.cellsig.2015.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
15
|
Kang HJ, Kang WS, Hong MH, Choe N, Kook H, Jeong HC, Kang J, Hur J, Jeong MH, Kim YS, Ahn Y. Involvement of miR-34c in high glucose-insulted mesenchymal stem cells leads to inefficient therapeutic effect on myocardial infarction. Cell Signal 2015; 27:2241-51. [DOI: 10.1016/j.cellsig.2015.07.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 07/28/2015] [Indexed: 11/28/2022]
|
16
|
Kook H, Kwon DH, Eom GH, Shin S, Joung H, Choe N, Nam YS, Kook T, Kim HS, Kim YS, Koh JT, Kim N, Nam KI. Abstract 418: Mdm2 E3 Ligase-mediated Ubiquitination of Histone Deacetylase 1 in Vascular Calcification. Circ Res 2015. [DOI: 10.1161/res.117.suppl_1.418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Vascular calcification (VC) often associates with many cardiovascular and metabolic diseases. Although VC is the cause of high morbidity and mortality, molecular mechanisms have yet to be elucidated. Here we report that MDM2-induced ubiquitination of histone deacetylase 1 (HDAC1) mediates VC. Loss of HDAC1 activity enhanced VC
in vivo
and
in vitro
. HDAC1 protein was reduced in cell and animal calcification models and in human calcified coronary artery and this reduction preceded VC. Calcification stresses induced MDM2 E3 ligase, which resulted in HDAC1 K74 ubiquitination. Forced expression of MDM2 enhanced VC, whereas loss of MDM2 blunted it. A decoy peptide spanning HDAC1 K74 prevented VC. These results demonstrate a previously unknown ubiquitination pathway as well as the involvement of HDAC1 in VC. Our results suggest MDM2-mediated HDAC1 ubiquitination as a new therapeutic target in VC.
Collapse
Affiliation(s)
- Hyun Kook
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| | - Duk-Hwa Kwon
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| | - Gwang Hyeon Eom
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| | - Sera Shin
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| | - Hosouk Joung
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| | - Nakwon Choe
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| | - Yoon Seok Nam
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| | - Taewon Kook
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| | - Hyung Seok Kim
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| | - Yong Sook Kim
- Chonnam Univ Hosp, Gwangju, Korea, Democratic People’s Republic of
| | - Jeong-Tae Koh
- Chonnam National Univ, Gwangju, Korea, Democratic People’s Republic of
| | - Nacksung Kim
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| | - Kwang Il Nam
- Chonnam National Univ Med Sch, Gwangju, Korea, Democratic People’s Republic of
| |
Collapse
|
17
|
Choe N, Kwon JS, Kim YS, Eom GH, Ahn YK, Baik YH, Park HY, Kook H. The microRNA miR-34c inhibits vascular smooth muscle cell proliferation and neointimal hyperplasia by targeting stem cell factor. Cell Signal 2015; 27:1056-65. [PMID: 25683915 DOI: 10.1016/j.cellsig.2014.12.022] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 12/09/2014] [Accepted: 12/26/2014] [Indexed: 10/24/2022]
Abstract
The fine balance between proliferation and differentiation of vascular smooth muscle cells (VSMCs) is indispensable for the maintenance of healthy blood vessels, whereas an increase in proliferation participates in pathologic cardiovascular events such as atherosclerosis and restenosis. Here we report that microRNA-34c (miR-34c) targets stem cell factor (SCF) to inhibit VSMC proliferation and neointimal hyperplasia. In an animal model, miR-34c was significantly increased in the rat carotid artery after catheter injury. Transient transfection of miR-34c to either VSMCs or A10 cells inhibited cell survival by inducing apoptosis, which was accompanied by an increase in expression of p21, p27, and Bax. Transfection of miR-34c also attenuated VSMC migration. Bioinformatics showed that SCF is a target candidate of miR-34c. miR-34c down-regulated luciferase activity driven by a vector containing the 3'-untranslated region of SCF in a sequence-specific manner. Forced expression of SCF in A10 cells induced proliferation and migration, whereas knocking-down of SCF reduced cell survival and migration. miR-34c antagomir-induced VSMC proliferation was blocked by SCF siRNA. Delivery of miR-34c to rat carotid artery attenuated the expression of SCF and blocked neointimal hyperplasia. These results suggest that miR-34c is a new modulator of VSMC proliferation and that it inhibits neointima formation by regulating SCF.
Collapse
Affiliation(s)
- Nakwon Choe
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; Department of Pharmacology, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Jin-Sook Kwon
- Division of Cardiovascular and Rare Disease, Korea National Institute of Health, Osong, Cheongju, Chungbuk 363-951, Republic of Korea
| | - Yong Sook Kim
- Department of Cardiology, Chonnam National University Hospital, Gwangju 501-757, Republic of Korea
| | - Gwang Hyeon Eom
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; Department of Pharmacology, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Young Keun Ahn
- Department of Cardiology, Chonnam National University Hospital, Gwangju 501-757, Republic of Korea
| | - Yung Hong Baik
- Department of Pharmacology, College of Medicine, Seonam University, Namwon 590-711, Republic of Korea
| | - Hyun-Young Park
- Division of Cardiovascular and Rare Disease, Korea National Institute of Health, Osong, Cheongju, Chungbuk 363-951, Republic of Korea
| | - Hyun Kook
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; Department of Pharmacology, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea.
| |
Collapse
|
18
|
Kook H, Eom GH, Nam YS, Choe N, Min HK. Abstract 188: Regulation Of Acetylation Of Histone Deacetylase 2 By P300/CBP-associated Factor/histone Deacetylase 5 In The Development Of Cardiac Hypertrophy. Circ Res 2014. [DOI: 10.1161/res.115.suppl_1.188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Rationale:
Histone deacetylases (HDACs) are closely involved in cardiac reprogramming. Although the functional roles of the class I and class IIa HDACs are well established, the significance of interclass crosstalk in the development of cardiac hypertrophy remains unclear.
Objective:
Recently, we suggested that casein kinase-2α1-dependent phosphorylation of HDAC2 leads to enzymatic activation, which in turn induces cardiac hypertrophy. Here we report an alternate posttranslational activation mechanism of HDAC2 that involves acetylation of HDAC2 mediated by p300/CBP-associated factor (pCAF)/HDAC5.
Methods and Results:
Hdac2 was acetylated in response to hypertrophic stresses in both cardiomyocytes and a mouse model. The acetylation was reduced by a histone acetyltransferase inhibitor but was increased by a nonspecific HDAC inhibitor. The enzymatic activity of Hdac2 was positively correlated with its acetylation status. pCAF bound to Hdac2 and induced acetylation. The HDAC2 K75 residue was responsible for hypertrophic stress-induced acetylation. The acetylationresistant Hdac2 K75R showed a significant decrease in phosphorylation on S394, which led to the loss of intrinsic activity. Hdac5, one of class IIa HDACs, directly deacetylated Hdac2. Acetylation of Hdac2 was increased in Hdac5 null mice. When an acetylation-mimicking mutant of Hdac2 was infected into cardiomyocytes, the anti-hypertrophic effect of either nuclear tethering of Hdac5 with leptomycin B or Hdac5 overexpression was reduced.
Conclusions:
Taken together, our results suggest a novel mechanism by which the balance of HDAC2 acetylation is regulated by pCAF and HDAC5 in the development of cardiac hypertrophy.
Collapse
Affiliation(s)
- Hyun Kook
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | | | - Yoon Seok Nam
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Nakwon Choe
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Hyun- Ki Min
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| |
Collapse
|
19
|
Joung H, Eom GH, Choe N, Lee HM, Ko JH, Kwon DH, Nam YS, Min H, Shin S, Kook J, Cho YK, Kim JC, Seo SB, Baik YH, Nam KI, Kook H. Ret finger protein mediates Pax7-induced ubiquitination of MyoD in skeletal muscle atrophy. Cell Signal 2014; 26:2240-8. [PMID: 25025573 DOI: 10.1016/j.cellsig.2014.07.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 07/09/2014] [Indexed: 01/07/2023]
Abstract
Skeletal muscle atrophy results from the net loss of muscular proteins and organelles and is caused by pathologic conditions such as nerve injury, immobilization, cancer, and other metabolic diseases. Recently, ubiquitination-mediated degradation of skeletal-muscle-specific transcription factors was shown to be involved in muscle atrophy, although the mechanisms have yet to be defined. Here we report that ret finger protein (RFP), also known as TRIM27, works as an E3 ligase in Pax7-induced degradation of MyoD. Muscle injury induced by sciatic nerve transection up-regulated RFP and RFP physically interacted with both Pax7 and MyoD. RFP and Pax7 synergistically reduced the protein amounts of MyoD but not the mRNA. RFP-induced reduction of MyoD protein was blocked by proteasome inhibitors. The Pax7-induced reduction MyoD was attenuated by RFP siRNA and by MG132, a proteasome inhibitor. RFPΔR, an RFP construct that lacks the RING domain, failed to reduce MyoD amounts. RFP ubiquitinated MyoD, but RFPΔR failed to do so. Forced expression of RFP, but not RFPΔR, enhanced Pax7-induced ubiquitination of MyoD, whereas RFP siRNA blocked the ubiquitination. Sciatic nerve injury-induced muscle atrophy as well the reduction in MyoD was attenuated in RFP knockout mice. Taken together, our results show that RFP works as a novel E3 ligase in the Pax7-mediated degradation of MyoD in response to skeletal muscle atrophy.
Collapse
Affiliation(s)
- Hosouk Joung
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; BK21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Gwang Hyeon Eom
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; Department of Pharmacology, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; BK21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Nakwon Choe
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Hye Mi Lee
- Department of Anatomy, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Jeong-Hyeon Ko
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Duk-Hwa Kwon
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; BK21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Yoon Seok Nam
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; BK21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Hyunki Min
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; BK21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Sera Shin
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Jeewon Kook
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; BK21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Young Kuk Cho
- Department of Pediatrics, Chonnam National University Hospital, Gwangju 501-746, Republic of Korea
| | - Jeong Chul Kim
- Department of Surgery, Chonnam National University Hospital, Gwangju 501-746, Republic of Korea
| | - Sang Beom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Yung Hong Baik
- Department of Pharmacology, College of Medicine, Seonam University, Namwon, Republic of Korea
| | - Kwang-Il Nam
- Department of Anatomy, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; BK21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | - Hyun Kook
- Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; Department of Pharmacology, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea; BK21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea.
| |
Collapse
|
20
|
Nam YS, Kim Y, Joung H, Kwon DH, Choe N, Min HK, Kim YS, Kim HS, Kim DK, Cho YK, Kim YH, Nam KI, Choi HC, Park DH, Suk K, Lee IK, Ahn Y, Lee CH, Choi HS, Eom GH, Kook H. Small heterodimer partner blocks cardiac hypertrophy by interfering with GATA6 signaling. Circ Res 2014; 115:493-503. [PMID: 25015078 DOI: 10.1161/circresaha.115.304388] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE Small heterodimer partner (SHP; NR0B2) is an atypical orphan nuclear receptor that lacks a conventional DNA-binding domain. Through interactions with other transcription factors, SHP regulates diverse biological events, including glucose metabolism in liver. However, the role of SHP in adult heart diseases has not yet been demonstrated. OBJECTIVE We aimed to investigate the role of SHP in adult heart in association with cardiac hypertrophy. METHODS AND RESULTS The roles of SHP in cardiac hypertrophy were tested in primary cultured cardiomyocytes and in animal models. SHP-null mice showed a hypertrophic phenotype. Hypertrophic stresses repressed the expression of SHP, whereas forced expression of SHP blocked the development of hypertrophy in cardiomyocytes. SHP reduced the protein amount of Gata6 and, by direct physical interaction with Gata6, interfered with the binding of Gata6 to GATA-binding elements in the promoter regions of natriuretic peptide precursor type A. Metformin, an antidiabetic agent, induced SHP and suppressed cardiac hypertrophy. The metformin-induced antihypertrophic effect was attenuated either by SHP small interfering RNA in cardiomyocytes or in SHP-null mice. CONCLUSIONS These results establish SHP as a novel antihypertrophic regulator that acts by interfering with GATA6 signaling. SHP may participate in the metformin-induced antihypertrophic response.
Collapse
Affiliation(s)
- Yoon Seok Nam
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Yoojung Kim
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Hosouk Joung
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Duk-Hwa Kwon
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Nakwon Choe
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Hyun-Ki Min
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Yong Sook Kim
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Hyung-Seok Kim
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Don-Kyu Kim
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Young Kuk Cho
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Yong-Hoon Kim
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Kwang-Il Nam
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Hyoung Chul Choi
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Dong Ho Park
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Kyoungho Suk
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - In-Kyu Lee
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Youngkeun Ahn
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Chul-Ho Lee
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Hueng-Sik Choi
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Gwang Hyeon Eom
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.)
| | - Hyun Kook
- From the Department of Pharmacology and Medical Research Center for Gene Regulation (Y.S.N., Y.K., H.J., D.-H.K., N.C., H.-K.M., G.H.E., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School, Gwangju, Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Gyeongsan, Korea (H.C.C.); Departments of Internal Medicine (I.-K.L.), Pharmacology, Brain Science and Engineering Institute (K.S.), and Ophthalmology (D.H.P.), Kyungpook National University School of Medicine, Daegu, Korea; Departments of Cardiology (Y.S.K., Y.A.) and Pediatrics (Y.K.C.), Chonnam National University Hospital, Gwangju, Korea; National Creative Research Initiatives Center for Nuclear Receptor Signals and Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju, Korea (D.-K.K., H.-S.C.); and Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea (Y.-H.K., C.-H.L.).
| |
Collapse
|
21
|
Kim YS, Kang HJ, Hong MH, Kang WS, Choe N, Kook H, Jeong MH, Ahn Y. Angiopoietin-like 4 is involved in the poor angiogenic potential of high glucose-insulted bone marrow stem cells. Korean Circ J 2014; 44:177-83. [PMID: 24876859 PMCID: PMC4037640 DOI: 10.4070/kcj.2014.44.3.177] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 02/21/2014] [Accepted: 03/13/2014] [Indexed: 01/17/2023] Open
Abstract
Background and Objectives Diabetes is reported to reduce the function or number of progenitor cells. We compared the gene expression patterns of bone marrow-derived mesenchymal stem cells from diabetic (DM-BMCs) and healthy (non-DM-BMCs) rats and suggested Angiopoietin-like 4 (Angptl4) could be a responsible factor for impaired angiogenesis of DM-BMCs. Subjects and Methods BMCs were isolated from DM or non-DM rat, and in vitro angiogenesis activity was compared by tube formation assay on Matrigel and complementary deoxyribonucleic acid expression was analyzed by microarray with or without oxytocin treatment. Human BMCs (hBMCs) were treated with high glucose, and were performed polymerase chain reaction, Western blot, and enzyme-linked immunosorbent assay. Angptl4 plasmid DNA and micro ribonucleic acid-132 (miR-132) were transfected to immortalized hBMCs. Results In vitro angiogenesis assay showed the impaired tube formation in DM-BMCs, and slightly recovery by oxytocin treatment. Angptl4, an adipokine, was upregulated in DM-BMCs compared to non-DM-BMCs. Oxytocin treatment reduced Angptl4 in DM-BMCs. In hBMCs, overexpression of Angptl4 attenuated the tube formation. In addition to Angptl4, miR-132 was increased by high glucose treatment. Collectively, high glucose resulted in impaired tube formation through miR-132 induction and Angptl4 upregulation in BMCs. Conclusion Our results show that the angiogenic activity of BMCs is impaired by high glucose stress, which would be mediated by Angptl4 and miR-132.
Collapse
Affiliation(s)
- Yong Sook Kim
- Research Laboratory of Cardiovascular Regeneration, Chonnam National University Hospital, Gwangju, Korea. ; Cardiovascular Convergence Research Center, Chonnam National University Hospital, Gwangju, Korea
| | - Hea Jin Kang
- Research Laboratory of Cardiovascular Regeneration, Chonnam National University Hospital, Gwangju, Korea. ; Center for Molecular Medicine, Graduate School, Chonnam National University, Gwangju, Korea
| | - Moon Hwa Hong
- Research Laboratory of Cardiovascular Regeneration, Chonnam National University Hospital, Gwangju, Korea
| | - Wan Seok Kang
- Research Laboratory of Cardiovascular Regeneration, Chonnam National University Hospital, Gwangju, Korea. ; Center for Molecular Medicine, Graduate School, Chonnam National University, Gwangju, Korea
| | - Nakwon Choe
- Department of Pharmacology and Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju, Korea
| | - Hyun Kook
- Department of Pharmacology and Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju, Korea
| | - Myung Ho Jeong
- Cardiovascular Convergence Research Center, Chonnam National University Hospital, Gwangju, Korea. ; Department of Cardiology, Chonnam National University Hospital, Gwangju, Korea
| | - Youngkeun Ahn
- Research Laboratory of Cardiovascular Regeneration, Chonnam National University Hospital, Gwangju, Korea. ; Cardiovascular Convergence Research Center, Chonnam National University Hospital, Gwangju, Korea. ; Department of Cardiology, Chonnam National University Hospital, Gwangju, Korea
| |
Collapse
|
22
|
Eom GH, Nam YS, Oh JG, Choe N, Min HK, Yoo EK, Kang G, Nguyen VH, Min JJ, Kim JK, Lee IK, Bassel-Duby R, Olson EN, Park WJ, Kook H. Regulation of acetylation of histone deacetylase 2 by p300/CBP-associated factor/histone deacetylase 5 in the development of cardiac hypertrophy. Circ Res 2014; 114:1133-43. [PMID: 24526703 DOI: 10.1161/circresaha.114.303429] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
RATIONALE Histone deacetylases (HDACs) are closely involved in cardiac reprogramming. Although the functional roles of class I and class IIa HDACs are well established, the significance of interclass crosstalk in the development of cardiac hypertrophy remains unclear. OBJECTIVE Recently, we suggested that casein kinase 2α1-dependent phosphorylation of HDAC2 leads to enzymatic activation, which in turn induces cardiac hypertrophy. Here we report an alternative post-translational activation mechanism of HDAC2 that involves acetylation of HDAC2 mediated by p300/CBP-associated factor/HDAC5. METHODS AND RESULTS Hdac2 was acetylated in response to hypertrophic stresses in both cardiomyocytes and a mouse model. Acetylation was reduced by a histone acetyltransferase inhibitor but was increased by a nonspecific HDAC inhibitor. The enzymatic activity of Hdac2 was positively correlated with its acetylation status. p300/CBP-associated factor bound to Hdac2 and induced acetylation. The HDAC2 K75 residue was responsible for hypertrophic stress-induced acetylation. The acetylation-resistant Hdac2 K75R showed a significant decrease in phosphorylation on S394, which led to the loss of intrinsic activity. Hdac5, one of class IIa HDACs, directly deacetylated Hdac2. Acetylation of Hdac2 was increased in Hdac5-null mice. When an acetylation-mimicking mutant of Hdac2 was infected into cardiomyocytes, the antihypertrophic effect of either nuclear tethering of Hdac5 with leptomycin B or Hdac5 overexpression was reduced. CONCLUSIONS Taken together, our results suggest a novel mechanism by which the balance of HDAC2 acetylation is regulated by p300/CBP-associated factor and HDAC5 in the development of cardiac hypertrophy.
Collapse
Affiliation(s)
- Gwang Hyeon Eom
- From the Department of Pharmacology (G.H.E., J.-K.K., H.K.) and Medical Research Center for Gene Regulation (G.H.E., Y.S.N., N.C., H.-K.M., H.K.), Chonnam National University Medical School, Gwangju, Republic of Korea; Global Research Laboratory and College of Life Sciences, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea (J.G.O., W.J.P.); Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Republic of Korea (E.-K.Y., I.-K.L.); Division of Clinical Pharmacology, Chonnam National University Hospital, Gwangju, Republic of Korea (G.K., J.-K.K.); Department of Nuclear Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea (V.H.N., J.-J.M.); and Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX (R.B.-D., E.N.O.)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Kwon DH, Eom GH, Kee HJ, Nam Y, Cho YK, Kim DK, Koo J, Ko JH, Shin S, Choe N, Joung H, Kim HN, Kim HS, Nam GI, Lee IK, Park SB, Choi HS, Kook H. Abstract 071: Estrogen-related Receptor Gamma Induces Cardiac Hypertrophy By Activating Gata4. Circ Res 2013. [DOI: 10.1161/res.113.suppl_1.a071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Introduction—
Estrogen-related receptor gamma (ERRγ) is an orphan nuclear receptor that has biological roles mainly in metabolism and it controls metabolic switching in perinatal heart. In adult heart diseases, however, the functional roles of ERRγ have not yet been elucidated.
Hypothesis—
In the present study, we aimed to characterize the role of ERRγ in cardiac hypertrophy. Here we show that ERRγ provokes cardiac hypertrophy by inducing GATA4 and that its inverse agonist, GSK-5182, prevents cardiac hypertrophy.
Methods and Results—
The functional roles of ERRγ in association with development of cardiac hypertrophy were examined in primarily cultured cardiomyocytes, in animal models, and in heart samples from human hypertrophic cardiomyopathy patients. ERRγ expression was increased in hearts obtained from human hypertrophic cardiomyopathy patients and in both agonist-induced cellular models and aortic banding-induced animal models of cardiac hypertrophy. Transgenic overexpression in mouse heart as well as forced expression of ERRγ in cardiomyocytes induced hypertrophic phenotypes. Knock-down of ERRγ blocked agonist-induced hypertrophic phenotypes. ERRγ directly bound to the proximal ERR-responsive element in the GATA4 promoter in a sequence-specific manner and thereby induced transcription. ERRγ-induced hypertrophy was blocked by inhibition of GATA4. GSK-5182 completely blocked cardiac hypertrophy in cardiomyocytes. It also prevented aortic banding-induced cardiac hypertrophy and fibrosis in mouse heart.
Conclusion—
These findings demonstrate a novel ERRγ/GATA4 signal cascade in the development of cardiac hypertrophy and suggest GSK-5182 as a possible therapeutic.
Collapse
Affiliation(s)
- Duk-hwa Kwon
- Chonnam National Univ, Gwanju, Korea, Republic of
| | | | - Hae Jin Kee
- Chonnam National Univ Hosp, Gwanju, Korea, Republic of
| | - Yoonseok Nam
- Chonnam National Univ, Gwanju, Korea, Republic of
| | - Young Kuk Cho
- Chonnam National Univ Hosp, Gwanju, Korea, Republic of
| | - Don-Kyu Kim
- Chonnam National Univ, Gwanju, Korea, Republic of
| | - Jayoung Koo
- Seoul National Univ, Seoul, Korea, Republic of
| | | | - Sera Shin
- Chonnam National Univ, Gwanju, Korea, Republic of
| | - Nakwon Choe
- Chonnam National Univ, Gwanju, Korea, Republic of
| | - Hosouk Joung
- Chonnam National Univ, Gwanju, Korea, Republic of
| | - Ha-neul Kim
- Chonnam National Univ, Gwanju, Korea, Republic of
| | | | - Gwang-Il Nam
- Chonnam National Univ, Gwanju, Korea, Republic of
| | - In-Kyu Lee
- Kyungpook National Univ Hosp, Daegu, Korea, Republic of
| | | | | | - Hyun Kook
- Chonnam National Univ, Gwanju, Korea, Republic of
| |
Collapse
|
24
|
Nam YS, Kee HJK, Kim Y, Eom GH, Shin S, Kim DK, Choi HS, Joung H, Cho YK, Ko JH, Choe N, Kook H. Abstract 077: Small Heterodimer Partner, An Orphan Nuclear Receptor, Inhibits Cardiac Hypertrophy. Circ Res 2013. [DOI: 10.1161/res.113.suppl_1.a077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
Small heterodimer partner (SHP; NR0B2) is an atypical orphan nuclear receptor lacking DNA binding domain. SHP directly modulates the activities of other nuclear receptors and regulates a variety of cellular events such as cell differentiation, proliferation, and metabolism in various tissues. However, the role of SHP in heart has not yet been elucidated. Thus, in this study, we tried to investigate the functional roles of SHP in heart physiology and in the development of cardiac hypertrophy.
Methods and Results:
We observed that SHP knock-out mice elicited cardiac hypertrophic features determined by heart weight to body weight or to tibia length ratios. Fetal genes, such as atrial natriuretic factor (ANF) or beta myosin heavy chain (βMHC) were significantly up-regulated in SHP knockout mice heart. In neonatal rat ventricular cardiomyocytes (NRVCs), phenylephrine (PE) reduced promoter activation of SHP and decreased protein level of SHP. Adenovirus-mediated over-expression of SHP (Adeno-SHP) significantly reduced hypertrophic responses induced by PE as assayed by [3H]-leucine incorporation, Nppa promoter activity, and cell size measurement. Adeno-SHP significantly reduced hypertrophy-associated proteins. In contrast, knock-down of SHP by small hairpin RNA, decreased both Myh7 and Nppa promoter activities, whereas it up-regulated ANF or α-tubulin expressions. Metfomin (N,N-Dimethylimidodicarbonimidic diamide), an anti-diabetic agent, up-regulated SHP in dose-response fashion. PE-induced activation of Nppa promoter and [3H]-leucine incorporation were completely blocked by metformin. PE-induced down-regulation of SHP was blunted by simultaneous treatment of metformin. Metformin-mediated antihypertrophic action was not observed when the SHP was down-regulated by small interfering RNA against to SHP.
Conclusions:
These results suggest that atypical orphan nuclear receptor SHP prevents cardiac hypertrophy and it mediates metformin-mediated antihypertrophic responses, implicating that theses signal cascades may serve as a novel therapeutic target of treatment of hypertrophic cardiomyopathy patients.
Collapse
Affiliation(s)
| | - Hae Jin Kee Kee
- Heart Rsch Cntr of Chonnam National Univ Hosp, Gwangju, Korea, Republic of
| | - Yoojung Kim
- Chonnam National Univ, Gwangju, Korea, Republic of
| | | | - Sera Shin
- Chonnam National Univ, Gwangju, Korea, Republic of
| | - Don-Kyu Kim
- Chonnam National Univ, Gwangju, Korea, Republic of
| | | | - Hosouk Joung
- Chonnam National Univ, Gwangju, Korea, Republic of
| | | | | | - Nakwon Choe
- Chonnam National Univ, Gwangju, Korea, Republic of
| | - Hyun Kook
- Chonnam National Univ, Gwangju, Korea, Republic of
| |
Collapse
|
25
|
Kee HJ, Park S, Kwon JS, Choe N, Ahn Y, Kook H, Jeong MH. B cell translocation gene, a direct target of miR-142-5p, inhibits vascular smooth muscle cell proliferation by down-regulating cell cycle progression. FEBS Lett 2013; 587:2385-92. [PMID: 23770100 DOI: 10.1016/j.febslet.2013.06.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 05/16/2013] [Accepted: 06/04/2013] [Indexed: 12/29/2022]
Abstract
Vascular smooth muscle cell (VSMC) proliferation plays a key role in neointimal hyperplasia and restenosis. Here we report the role of the microRNA miR-142-5p and its downstream target genes on the proliferation of cultured VSMCs. miR-142-5p promoted VSMC proliferation by down-regulating B cell translocation gene 3 (BTG3). We found that BTG3 inhibited the expression of cell cycle regulatory genes and cell growth. As shown by luciferase reporter assay, miR-142-5p bound directly to the 3'-untranslated region of BTG3. Overexpression of miR-142-5p induced expression of cell cycle regulatory genes. Thus, BTG3, a novel, direct target of miR-142-5p, negatively regulates VSMC proliferation.
Collapse
Affiliation(s)
- Hae Jin Kee
- Heart Research Center of Chonnam National University Hospital, Gwangju 501-757, Republic of Korea.
| | | | | | | | | | | | | |
Collapse
|
26
|
Choe N, Kwon JS, Kim JR, Eom GH, Kim Y, Nam KI, Ahn Y, Kee HJ, Kook H. The microRNA miR-132 targets Lrrfip1 to block vascular smooth muscle cell proliferation and neointimal hyperplasia. Atherosclerosis 2013; 229:348-55. [PMID: 23880186 DOI: 10.1016/j.atherosclerosis.2013.05.009] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 05/08/2013] [Accepted: 05/08/2013] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The proliferation and remodeling of vascular smooth muscle cells (VSMCs) is an important pathological event in atherosclerosis and restenosis. Here we report that microRNA-132 (miR-132) blocks vascular smooth muscle cells (VSMC) proliferation by inhibiting the expression of LRRFIP1 [leucine-rich repeat (in Flightless 1) interacting protein-1]. METHODS AND RESULTS MicroRNA microarray revealed that miR-132 was upregulated in the rat carotid artery after catheter injury, which was further confirmed by quantitative real-time RT-PCR. Transfection of a miR-132 mimic significantly inhibited the proliferation of VSMCs, whereas transfection of a miR-132 antagomir increased it. miR-132 mimic inhibited VSMC migration and induced apoptosis. miR-132 mimic increased the protein amounts of both p27 and smooth muscle (SM) α-actin, whereas it decreased SM α-actin and Bcl2. Bioinformatics showed that LRRFIP1 is a target candidate of miR-132. miR-132 down-regulated luciferase activity driven by a vector containing the 3'-untranslated region of Lrrfip1 in a sequence-specific manner. LRRFIP1 induced VSMC proliferation and increased phosphorylation of ERK. Immunohistochemical analysis revealed that Lrrfip1 was clearly expressed along with the basal laminar area of smooth muscle, and its expression pattern was disrupted 7 days after arterial injury. LRRFIP1 mRNA was decreased 14 days after injury. Delivery of miR-132 to rat carotid artery reduced LRRFIP1 expression and attenuated neointimal proliferation in carotid artery injury models. CONCLUSIONS Our results suggest that miR-132 is a novel regulator of VSMC proliferation that represses neointimal formation by inhibiting LRRFIP1 expression.
Collapse
Affiliation(s)
- Nakwon Choe
- Department of Pharmacology, Medical Research Center for Gene Regulation, and National Research Laboratory for Heart and Muscle Diseases, Chonnam National University Medical School, Gwangju 501-746, Republic of Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Eom GH, Cho YK, Ko JH, Shin S, Choe N, Kim Y, Joung H, Kee HJ, Kook H. Abstract P187: Casein Kinase 2/Histone Deacetylase 2/Krúppel-like Factor 4 Is a Novel Axis of Development of Cardiac Hypertrophy. Circ Res 2011. [DOI: 10.1161/res.109.suppl_1.ap187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background.
Cardiac hypertrophy is characterized by transcriptional reprogramming of fetal gene expression, and histone modifiers are tightly linked to the regulation of those genes. We previously reported that activation of histone deacetylase (HDAC) 2, one of the class I HDACs, mediates hypertrophy. Here we suggest that disinhibiting of kruppel-like factor 4 (Klf4) by casein kinase-2α1 (CK2α1)-dependent phosphorylation of HDAC2 S394 develop the cardiac hypertrophy.
Methods and Results.
Hypertrophic stimuli phosphorylated Hdac2 S394, which was necessary for its enzymatic activation and thereby for the development of hypertrophic phenotypes. Transgenic mice overexpressing Hdac2-wild type exhibited cardiac hypertrophy, whereas those expressing phosphorylation-resistant Hdac2 S394A did not. Compared with that in age-matched normal human hearts, phosphorylation of Hdac2 S394 was dramatically increased in hypertrophic cardiomyopathy patients. Hypertrophy-induced phosphorylation of Hdac2 S394 and its enzymatic activity were completely blocked either by CK2-blockers or by
CK2a1 siRNA.
Hypertrophic stimuli led CK2α1 to be activated, and its chemical inhibitors blocked hypertrophy in both phenylephrine-treated cardiomyocytes and in isoproterenol-administered mice. However, by utilizing KLF4-binding element-disrupted
Nppa
promoter, treatment with either TBB or TBCA failed to reduce the mutant promoter activity. These results emphasized that CK2α1-induced hypertrophic events are dependent on both Hdac2 and KLF4. CK2α1-transgenic mice developed hypertrophy, which was attenuated by administration of trichostatin A, an HDAC inhibitor. Overexpression of CK2α1 caused hypertrophy in cardiomyocytes, whereas its chemical inhibitors as well as Hdac2 S394A blunted it. Hypertrophy in CK2α1-transgenic mice was exaggerated by crossing these mice with Hdac2-transgenic mice. By contrast, however, it was blocked when CK2α1-transgenic mice were crossed with Hdac2 S394A-transgenic mice.
Conclusions.
We have demonstrated a novel mechanism in the development of cardiac hypertrophy by which CK2 activates HDAC2 via phosphorylating HDAC2 S394 and consequence down-regulation of KLF4.
Collapse
Affiliation(s)
| | - Young Kuk Cho
- Chonnam National Univ Hosp, Gwangju, Korea, Republic of
| | - Jeong-Hyeon Ko
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Sera Shin
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Nakwon Choe
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Yoojung Kim
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Hosouk Joung
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Hae Jin Kee
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Hyun Kook
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| |
Collapse
|
28
|
Eom GH, Joung H, Kim Y, Kee HJ, Shin S, Kim DK, Choe N, Kwon DH, Nam KI, Choi HS, Kook H. Abstract P226: Small Heterodimer Partner Negatively Regulates Cardiac Hypertrophy Through Upregulation of GATA6. Circ Res 2011. [DOI: 10.1161/res.109.suppl_1.ap226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Small heterodimer partner (SHP; NR0B2) is an atypical orphan nuclear receptor that regulates a variety of cellular events such as cell proliferation, differentiation and metabolism in liver and bone. However, the role of SHP in heart has not yet been elucidated. In this study, we investigated the functional roles of SHP in cardiac hypertrophy. In rat neonatal cardiomyocytes model, phenylephrine (PE) down-regulated expression of SHP. Transient transfection of SHP decreased the promoter activity of
Nppa
(natriuretic polypeptide precursor type A). Adenovirus-mediated overexpression of SHP (Ad-SHP) blocked gene expressions of GATA4, GATA6, and serum response factor (SRF). The increase in [
3
H]-leucine incorporation induced by PE or fetal bovine serum (FBS) was dramatically reduced by Ad-SHP. Likewise, increases in cell size with those hypertrophic stresses were significantly attenuated by Ad-SHP. The expressions of atrial natriuretic factor (ANF), β-myosin heavy chain (βMHC), and skeletal α-actin were significantly higher in hearts of SHP null mice. SHP physically interacted with GATA6 in mammalian cells. SHP significantly decreased the activation of -3003
Nppa
promoter induced by GATA6. The action of SHP on
Nppa
promoter activity was partially recovered by GATA6. Taken together, these results suggest that SHP works as a novel anti-hypertrophic regulator by repressing GATA6.
Collapse
Affiliation(s)
| | - Hosouk Joung
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Yoojung Kim
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Hae Jin Kee
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Sera Shin
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Don-Kyu Kim
- Chonnam National Univ Hormone Rsch Cntr, Gwangju, Korea, Republic of
| | - Nakwon Choe
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Duk-hwa Kwon
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Kwang-Il Nam
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| | - Hueng-Sik Choi
- Chonnam National Univ Hormone Rsch Cntr, Gwangju, Korea, Republic of
| | - Hyun Kook
- Chonnam National Univ Med Sch, Gwangju, Korea, Republic of
| |
Collapse
|
29
|
Eom GH, Kim KB, Kim JH, Kim JY, Kim JR, Kee HJ, Kim DW, Choe N, Park HJ, Son HJ, Choi SY, Kook H, Seo SB. Histone methyltransferase SETD3 regulates muscle differentiation. J Biol Chem 2011; 286:34733-42. [PMID: 21832073 DOI: 10.1074/jbc.m110.203307] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Histone lysine methylation, as one of the most important factors in transcriptional regulation, is associated with a various physiological conditions. Using a bioinformatics search, we identified and subsequently cloned mouse SET domain containing 3 (SETD3) with SET (Su(var)3-9, Enhancer-of-zeste and Trithorax) and Rubis-subs-bind domains. SETD3 is a novel histone H3K4 and H3K36 methyltransferase with transcriptional activation activity. SETD3 is expressed abundantly in muscular tissues and, when overexpressed, activates transcription of muscle-related genes, myogenin, muscle creatine kinase (MCK), and myogenic factor 6 (Myf6), thereby inducing muscle cell differentiation. Conversely, knockdown of SETD3 by shRNA significantly retards muscle cell differentiation. In this study, SETD3 was recruited to the myogenin gene promoter along with MyoD where it activated transcription. Together, these data indicate that SETD3 is a H3K4/K36 methyltransferase and plays an important role in the transcriptional regulation of muscle cell differentiation.
Collapse
Affiliation(s)
- Gwang Hyeon Eom
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 156-756, Republic of Korea
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Kee HJ, Kim JR, Joung H, Choe N, Lee SE, Eom GH, Kim JC, Geyer SH, Jijiwa M, Kato T, Kawai K, Weninger WJ, Seo SB, Nam KI, Jeong MH, Takahashi M, Kook H. Ret finger protein inhibits muscle differentiation by modulating serum response factor and enhancer of polycomb1. Cell Death Differ 2011; 19:121-31. [PMID: 21637294 DOI: 10.1038/cdd.2011.72] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Skeletal myogenesis is precisely regulated by multiple transcription factors. Previously, we demonstrated that enhancer of polycomb 1 (Epc1) induces skeletal muscle differentiation by potentiating serum response factor (SRF)-dependent muscle gene activation. Here, we report that an interacting partner of Epc1, ret finger protein (RFP), blocks skeletal muscle differentiation. Our findings show that RFP was highly expressed in skeletal muscles and was downregulated during myoblast differentiation. Forced expression of RFP delayed myoblast differentiation, whereas knockdown enhanced it. Epc1-induced enhancements of SRF-dependent multinucleation, transactivation of the skeletal α-actin promoter, binding of SRF to the serum response element, and muscle-specific gene induction were blocked by RFP. RFP interfered with the physical interaction between Epc1 and SRF. Muscles from rfp knockout mice (Rfp(-/-)) mice were bigger than those from wild-type mice, and the expression of SRF-dependent muscle-specific genes was upregulated. Myotube formation and myoblast differentiation were enhanced in Rfp(-/-) mice. Taken together, our findings highlight RFP as a novel regulator of muscle differentiation that acts by modulating the expression of SRF-dependent skeletal muscle-specific genes.
Collapse
Affiliation(s)
- H J Kee
- Department of Pharmacology and Medical Research Center for Gene Regulation, Chonnam National University Medical School, Gwangju, South Korea
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Eom GH, Cho YK, Ko JH, Shin S, Choe N, Kim Y, Joung H, Kim HS, Nam KI, Kee HJ, Kook H. Casein Kinase-2α1 Induces Hypertrophic Response by Phosphorylation of Histone Deacetylase 2 S394 and its Activation in the Heart. Circulation 2011; 123:2392-403. [DOI: 10.1161/circulationaha.110.003665] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Gwang Hyeon Eom
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| | - Young Kuk Cho
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| | - Jeong-Hyeon Ko
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| | - Sera Shin
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| | - Nakwon Choe
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| | - Yoojung Kim
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| | - Hosouk Joung
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| | - Hyung-Seok Kim
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| | - Kwang-Il Nam
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| | - Hae Jin Kee
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| | - Hyun Kook
- From the Medical Research Center for Gene Regulation (G.H.E., J.-H.K., S.S., N.C., Y.K., H.J., H.J.K., H.K.), Departments of Pharmacology (G.H.E., J.-H.K., N.C., Y.K., H.J., H.K.), Forensic Medicine (H.-S.K.), and Anatomy (K.-I.N.), Chonnam National University Medical School; and Department of Pediatrics (Y.K.C.) and Heart Research Center (H.J.K., H.K.), Chonnam National University Hospital, Gwangju, South Korea
| |
Collapse
|
32
|
Kim JR, Kee HJ, Kim JY, Joung H, Nam KI, Eom GH, Choe N, Kim HS, Kim JC, Kook H, Seo SB, Kook H. Enhancer of polycomb1 acts on serum response factor to regulate skeletal muscle differentiation. J Biol Chem 2009; 284:16308-16316. [PMID: 19359245 DOI: 10.1074/jbc.m807725200] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Skeletal muscle differentiation is well regulated by a series of transcription factors. We reported previously that enhancer of polycomb1 (Epc1), a chromatin protein, can modulate skeletal muscle differentiation, although the mechanisms of this action have yet to be defined. Here we report that Epc1 recruits both serum response factor (SRF) and p300 to induce skeletal muscle differentiation. Epc1 interacted physically with SRF. Transfection of Epc1 to myoblast cells potentiated the SRF-induced expression of skeletal muscle-specific genes as well as multinucleation. Proximal CArG box in the skeletal alpha-actin promoter was responsible for the synergistic activation of the promoter-luciferase. Epc1 knockdown caused a decrease in the acetylation of histones associated with serum response element (SRE) of the skeletal alpha-actin promoter. The Epc1.SRF complex bound to the SRE, and the knockdown of Epc1 resulted in a decrease in SRF binding to the skeletal alpha-actin promoter. Epc1 recruited histone acetyltransferase activity, which was potentiated by cotransfection with p300 but abolished by si-p300. Epc1 directly bound to p300 in myoblast cells. Epc1+/- mice showed distortion of skeletal alpha-actin, and the isolated myoblasts from the mice had impaired muscle differentiation. These results suggest that Epc1 is required for skeletal muscle differentiation by recruiting both SRF and p300 to the SRE of muscle-specific gene promoters.
Collapse
Affiliation(s)
- Ju-Ryoung Kim
- From the Medical Research Center for Gene Regulation, Gwangju 501-746; Departments of Pharmacology, Gwangju 501-746
| | - Hae Jin Kee
- From the Medical Research Center for Gene Regulation, Gwangju 501-746; Departments of Pharmacology, Gwangju 501-746; BK 21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746
| | - Ji-Young Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 156-745, South Korea
| | - Hosouk Joung
- From the Medical Research Center for Gene Regulation, Gwangju 501-746; BK 21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746
| | - Kwang-Il Nam
- BK 21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746; Anatomy, Gwangju 501-746
| | - Gwang Hyeon Eom
- From the Medical Research Center for Gene Regulation, Gwangju 501-746; Departments of Pharmacology, Gwangju 501-746
| | - Nakwon Choe
- From the Medical Research Center for Gene Regulation, Gwangju 501-746; Departments of Pharmacology, Gwangju 501-746
| | - Hyung-Suk Kim
- BK 21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746; Forensic Medicine, Gwangju 501-746
| | | | - Hoon Kook
- Pediatrics, Chonnam National University Hospital, Gwangju 501-746
| | - Sang Beom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 156-745, South Korea
| | - Hyun Kook
- From the Medical Research Center for Gene Regulation, Gwangju 501-746; Departments of Pharmacology, Gwangju 501-746; BK 21 Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju 501-746.
| |
Collapse
|
33
|
Kee HJ, Eom GH, Joung H, Shin S, Kim JR, Cho YK, Choe N, Sim BW, Jo D, Jeong MH, Kim KK, Seo JS, Kook H. Activation of Histone Deacetylase 2 by Inducible Heat Shock Protein 70 in Cardiac Hypertrophy. Circ Res 2008; 103:1259-69. [DOI: 10.1161/01.res.0000338570.27156.84] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Diverse cardiac diseases induce cardiac hypertrophy, which leads to dilatation and heart failure. We previously reported that hypertrophy can be blocked by class I histone deacetylase (HDAC) inhibitor, which prompted us to investigate the regulatory mechanism of class I HDACs. Cardiac hypertrophy was introduced by aortic banding, by infusion of isoproterenol or angiotensin II, or by swimming. Hypertrophic stimuli transiently elevated the activity of histone deacetylase-2 (Hdac2), a class I HDAC. In cardiomyocytes, forced expression of Hdac2 simulated hypertrophy in an Akt-dependent manner, whereas enzymatically inert Hdac2 H141A failed to do so. Hypertrophic stimuli induced the expression of heat shock protein (Hsp)70. The induced Hsp70 physically associated with and activated Hdac2. Hsp70 overexpression produced a hypertrophic phenotype, which was blocked either by siHdac2 or by a dominant negative Hsp70ΔABD. In
Hsp70.1
−/−
mice, cardiac hypertrophy and Hdac2 activation were significantly blunted. Heat shock either to cardiomyocytes or to mice activated Hdac2 and induced hypertrophy. However, heat shock-induced Hdac2 activation was blunted in the cardiomyocytes isolated from
Hsp70.1
−/−
mice. These results suggest that the induction of Hsp70 in response to diverse hypertrophic stresses and the ensuing activation of HDAC2 trigger cardiac hypertrophy, emphasizing HSP70/HDAC2 as a novel mechanism regulating hypertrophy.
Collapse
Affiliation(s)
- Hae Jin Kee
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Gwang Hyeon Eom
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Hosouk Joung
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Sera Shin
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Ju-Ryoung Kim
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Young Kuk Cho
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Nakwon Choe
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Bo-Woong Sim
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Daewoong Jo
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Myung Ho Jeong
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Kyung Keun Kim
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Jeong-Sun Seo
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| | - Hyun Kook
- From the Departments of Pharmacology (H.J.K., G.H.E., H.J., S.S., J.-R.K., N.C., K.K.K., H.K.), Biomedical Science (D.J.) and Medical Research Center for Gene Regulation (H.J.K., G.H.E., H.J., J.-R.K., K.K.K., H.K.), Chonnam National University Medical School, Gwangju; Department of Pediatrics (Y.K.C.), Heart Center (M.H.J.), Chonnam National University Hospital, Gwangju, South Korea; Macrogen Inc (B.-W.S., J.-S.S.) and Department of Biochemistry and Molecular Biology (J.-S.S.), Seoul National
| |
Collapse
|
34
|
Kim SM, Kee HJ, Choe N, Kim JY, Kook H, Kook H, Seo SB. The histone methyltransferase activity of WHISTLE is important for the induction of apoptosis and HDAC1-mediated transcriptional repression. Exp Cell Res 2007; 313:975-83. [PMID: 17239852 DOI: 10.1016/j.yexcr.2006.12.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2006] [Revised: 12/15/2006] [Accepted: 12/19/2006] [Indexed: 11/27/2022]
Abstract
Posttranslational histone methylation has been correlated with transcriptional regulation. However, the functional significance of methylation of lysine residues of histone remains largely unknown. Previously, we have characterized a novel histone methyltransferase (HMTase), WHISTLE which methylates histone H3-K4 and H3-K27 to repress transcription. In this study, we demonstrated that WHISTLE can induce apoptotic cell death through caspase-3 activation and that HMTase activity is important for the apoptosis induction. Deletion mapping analysis elicited that N-terminus PWWP region is required for HMTase activity by interacting with putative associating factors. Point mutant analysis revealed that SET domain cysteine 297 is a critical residue for the HMTase activity of WHISTLE. WHISTLE repressed transcription through HDAC1 recruitment possibly through the N-terminus region. Our results suggest that HMTase WHISTLE induces apoptosis in an HMTase activity-dependent manner and represses transcription of target genes through HDAC1 recruitment.
Collapse
Affiliation(s)
- Sung-Mi Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 156-756, Korea
| | | | | | | | | | | | | |
Collapse
|
35
|
Abstract
We showed previously that both crocidolite and chrysotile asbestos inhalation induced a persistent macrophage inflammatory response within the pleural space of the rat. We postulated that the stimulus for pleural macrophage recruitment after asbestos exposure was the induction of monocyte chemoattractant protein-1 (MCP-1) synthesis by pleural mesothelial cells. To test this hypothesis, rat pleural mesothelial cells (RPMC) were cultured with or without chrysotile or crocidolite asbestos fibers (8 micrograms/cm2) in the presence (50 ng/mL) or absence of either tumor necrosis factor-alpha (TNF-alpha) or interleukin-1 beta (IL-1 beta). MCP-1 mRNA expression was assessed by RT-PCR in RPMC cultured for 2 to 24 hours, and MCP-1 protein secretion was measured by ELISA in conditioned medium from 24-hour and 48-hour cultures. Crocidolite and chrysotile fibers induced MCP-1 mRNA expression in RPMC which was maximal after 12 hours in the absence of cytokines, but which peaked after 2 hours when RPMC were challenged with asbestos + TNF-alpha or IL-1 beta. Both types of asbestos also significantly increased MCP-1 protein secretion after 24 and 48 hours (P < .0001), an effect that was potentiated by cytokine stimulation. Rats exposed by inhalation to either chrysotile or crocidolite asbestos fibers also had greater amounts of MCP-1 protein in their pleural lavage fluid than did sham-exposed rats. These findings suggest that MCP-1 secretion by RPMC may have a role in the initiation and/or potentiation of asbestos-induced pleural injury.
Collapse
Affiliation(s)
- S Tanaka
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814-4799, USA
| | | | | | | | | |
Collapse
|
36
|
Choe N, Zhang J, Iwagaki A, Tanaka S, Hemenway DR, Kagan E. Asbestos exposure upregulates the adhesion of pleural leukocytes to pleural mesothelial cells via VCAM-1. Am J Physiol 1999; 277:L292-300. [PMID: 10444523 DOI: 10.1152/ajplung.1999.277.2.l292] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study was designed to assess the effects of in vitro and in vivo asbestos exposure on the adhesion of rat pleural leukocytes (RPLs) labeled with the fluorochrome calcein AM to rat pleural mesothelial cells (RPMCs). Exposure of RPMCs for 24 h to either crocidolite or chrysotile fibers (1.25-10 microgram/cm(2)) increased the adhesion of RPLs to RPMCs in a dose-dependent fashion, an effect that was potentiated by interleukin-1beta. These findings were not observed with nonfibrogenic carbonyl iron particles. Crocidolite and chrysotile plus interleukin-1beta also upregulated vascular cell adhesion molecule-1 mRNA and protein expression in RPMCs, and the binding of RPL to asbestos-treated RPMCs was abrogated by anti-vascular cell adhesion molecule-1 antibody. PRLs exposed by intermittent inhalation to crocidolite for 2 wk manifested significantly greater binding to RPMCs than did RPLs from sham-exposed animals. The ability of asbestos fibers to upregulate RPL adhesion to RPMCs may play a role in the induction and/or potentiation of asbestos-induced pleural injury.
Collapse
Affiliation(s)
- N Choe
- Department of Pathology, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814-4799, USA
| | | | | | | | | | | |
Collapse
|
37
|
Zhu S, Manuel M, Tanaka S, Choe N, Kagan E, Matalon S. Contribution of reactive oxygen and nitrogen species to particulate-induced lung injury. Environ Health Perspect 1998; 106 Suppl 5:1157-1163. [PMID: 9788891 PMCID: PMC1533367 DOI: 10.1289/ehp.98106s51157] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Recently, a second pathway for the generation of potential oxidants with the reactivity of the hydroxyl radical without the need for metal catalysis has been described. In response to various inflammatory stimuli, lung endothelial, alveolar, and airway epithelial cells, as well as activated alveolar macrophages, produce both nitric oxide (.NO) and superoxide anion radicals (O2.-). .NO regulates pulmonary vascular and airway tone and plays an important role in lung host defense against various bacteria. However, .NO may be cytotoxic by inhibiting critical enzymes such as mitochondrial aconitase and ribonucleotide reductase, by S-nitrosolation of thiol groups, or by binding to their iron-sulfur centers. In addition, .NO reacts with O2.- at a near diffusion-limited rate to form the strong oxidant peroxynitrite (ONOO-), which can nitrate and oxidize key amino acids in various lung proteins such as surfactant protein A, and inhibit their functions. The presence of ONOO- in the lungs of patients with acute respiratory distress syndrome has been demonstrated by measuring levels of nitrotyrosine, the stable product of tyrosine nitration. Various studies have shown that inhalation or intratracheal instillation of various respirable mineral dusts or asbestos fibers increased levels of inducible nitric oxide synthase mRNA. In this presentation, we review the evidence for the upregulation of .NO in the lungs of animals exposed to mineral particulates and assess the contribution of reactive nitrogen species in the pathogenesis of the resultant lung injury.
Collapse
Affiliation(s)
- S Zhu
- Department of Anesthesiology, University of Alabama at Birmingham 35233-6810, USA
| | | | | | | | | | | |
Collapse
|
38
|
Gordon M, Choe N, Duffy J, Ekuan G, Heilman P, Muiznieks I, Ruszaj M, Shurtleff BB, Strand S, Wilmoth J, Newman LA. Phytoremediation of trichloroethylene with hybrid poplars. Environ Health Perspect 1998; 106 Suppl 4:1001-4. [PMID: 9703485 PMCID: PMC1533336 DOI: 10.1289/ehp.98106s41001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Axenic tumor cultures of poplar cells, clone H11-11, were grown in the presence of [14C]-trichloroethylene (TCE) (uniformly labeled). The cells were capable of metabolizing TCE to produce trichloroethanol, di- and trichloroacetic acid. Some of the carbon from TCE was found in insoluble, nonextractable cell residue, and small amounts were mineralized to [14C]CO2. Poplar cuttings grown in soil and exposed to TCE produced the same metabolites. In field trials, trees were planted in soil in test cells and exposed to TCE via underground water injection during the growing season. During the growing season, at least 95% of the TCE was removed from the influent water stream in cells containing trees. Mass balance studies conducted in the laboratory indicated that 70 to 90% of the TCE was transpired; however, greenhouse and field study results showed that less than 5% of the total TCE taken up by the plants is transpired. These results show that significant TCE uptake and degradation occur in poplars. Poplars appear to be useful for in situ remediation of TCE-contaminated sites under proper conditions.
Collapse
Affiliation(s)
- M Gordon
- University of Washington, Dept. of Biochemistry, Seattle 98195-7350, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Choe N, Tanaka S, Kagan E. Asbestos fibers and interleukin-1 upregulate the formation of reactive nitrogen species in rat pleural mesothelial cells. Am J Respir Cell Mol Biol 1998; 19:226-36. [PMID: 9698594 DOI: 10.1165/ajrcmb.19.2.3111] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Nitric oxide radical (.NO) and peroxynitrite anion (ONOO-) have been implicated in lung inflammation and may be important in pleural injury. The present study was undertaken to determine the effects of asbestos exposure and cytokine stimulation on .NO and ONOO- production by rat pleural mesothelial cells. Accordingly, rat parietal pleural mesothelial cells were cultured for 2 to 72 h with or without 50 ng/ml of recombinant interleukin-1beta (IL-1beta) in the presence (1.05 to 8.4 microg/cm2) or absence of crocidolite or chrysotile asbestos fibers. The effects of asbestos were compared with those of carbonyl iron, a nonfibrogenic particulate. Mesothelial cell messenger RNA (mRNA) expression of the inducible form of .NO synthase (iNOS), assessed with the reverse transcription-polymerase chain reaction (RT-PCR), increased progressively from 2 to 12 h in IL-1beta-containing cultures. Nitrite (NO2-), the stable oxidation product of .NO in mesothelial cell conditioned medium, was assayed through the Griess reaction. Both types of asbestos fibers (chrysotile > crocidolite) upregulated the formation of NO2- in mesothelial cells costimulated with IL-1beta in a concentration-dependent and time-dependent fashion. In contrast, carbonyl iron did not upregulate NO2- formation in IL-1beta-stimulated cells. Both types of asbestos fibers also induced iNOS protein expression and the formation of nitrotyrosine in mesothelial cells and greatly induced the formation of nitrate (NO3-), a surrogate marker of ONOO- formation, in IL-1beta-stimulated cells. However, the effects of chrysotile were notably greater than those of crocidolite. These findings may have significance for the induction of pleural injury by asbestos fibers.
Collapse
Affiliation(s)
- N Choe
- Department of Pathology, Uniformed Services University of the Health Sciences, F. Edward Hébert School of Medicine, Bethesda, Maryland, USA
| | | | | |
Collapse
|
40
|
Tanaka S, Choe N, Hemenway DR, Zhu S, Matalon S, Kagan E. Asbestos inhalation induces reactive nitrogen species and nitrotyrosine formation in the lungs and pleura of the rat. J Clin Invest 1998; 102:445-54. [PMID: 9664087 PMCID: PMC508904 DOI: 10.1172/jci3169] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
To determine whether asbestos inhalation induces the formation of reactive nitrogen species, three groups of rats were exposed intermittently over 2 wk to either filtered room air (sham-exposed) or to chrysotile or crocidolite asbestos fibers. The rats were killed at 1 or 6 wk after exposure. At 1 wk, significantly greater numbers of alveolar and pleural macrophages from asbestos-exposed rats than from sham-exposed rats demonstrated inducible nitric oxide synthase protein immunoreactivity. Alveolar macrophages from asbestos-exposed rats also generated significantly greater nitrite formation than did macrophages from sham-exposed rats. Strong immunoreactivity for nitrotyrosine, a marker of peroxynitrite formation, was evident in lungs from chrysotile- and crocidolite-exposed rats at 1 and 6 wk. Staining was most evident at alveolar duct bifurcations and within bronchiolar epithelium, alveolar macrophages, and the visceral and parietal pleural mesothelium. Lungs from sham-exposed rats demonstrated minimal immunoreactivity for nitrotyrosine. Significantly greater quantities of nitrotyrosine were detected by ELISA in lung extracts from asbestos-exposed rats than from sham-exposed rats. These findings suggest that asbestos inhalation can induce inducible nitric oxide synthase activation and peroxynitrite formation in vivo, and provide evidence of a possible alternative mechanism of asbestos-induced injury to that thought to be induced by Fenton reactions.
Collapse
Affiliation(s)
- S Tanaka
- Department of Pathology, Uniformed Services University of the Health Sciences, F. Edward Hébert School of Medicine, Bethesda, Maryland 20814-4799, USA
| | | | | | | | | | | |
Collapse
|
41
|
Choe N, Tanaka S, Xia W, Hemenway DR, Roggli VL, Kagan E. Pleural macrophage recruitment and activation in asbestos-induced pleural injury. Environ Health Perspect 1997; 105 Suppl 5:1257-60. [PMID: 9400734 PMCID: PMC1470154 DOI: 10.1289/ehp.97105s51257] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The pathogenesis of asbestos-induced pleural fibrosis is poorly understood. Moreover, there has been a long-standing controversy regarding the relative potential of different commercial types of asbestos to cause pleural disease. We postulated that inhaled asbestos fibers translocate to the pleural space where they stimulate the recruitment and activation of pleural macrophages. To test this hypothesis, and to determine whether there are differences between inhaled amphibole and serpentine asbestos, Fischer 344 rats were exposed by intermittent inhalation (6 hr/day for 5 days/week over 2 weeks) to either National Institute of Environmental Health Sciences (NIEHS) crocidolite (average concentration 7.55 mg/m3) or NIEHS chrysotile fibers (average concentration 8.51 mg/m3). Comparisons were made with sham-exposed rats. The rats were sacrificed at 1 and 6 weeks after the cessation of exposure. More pleural macrophages were recovered at 1 and 6 weeks after crocidolite and chrysotile exposure than after sham exposure. Small numbers of crocidolite fibers (approximately 1 per 4000 cells) were detected in the pleural cell pellet of one crocidolite-exposed rat by scanning electron microscopy. Pleural macrophage supernatants were assayed for production of nitric oxide (NO) (by the Griess reaction) and tumor necrosis factor alpha (TNF-alpha) (by an enzyme-linked immunosorbent assay method). Significantly greater amounts of NO as well as TNF-alpha were generated by pleural macrophages at 1 and 6 weeks after either crocidolite or chrysotile inhalation than after sham exposure. Conceivably, translocation of asbestos fibers to the pleural space may provide a stimulus for persistent pleural space inflammation, cytokine production, and the generation of toxic oxygen and nitrogen radicals. Enhanced cytokine secretion within the pleural space may in turn upregulate adhesion molecule expression and the synthesis of extracellular matrix constituents by pleural mesothelial cells. Thus, our findings may have significance for the development of asbestos-induced pleural injury.
Collapse
Affiliation(s)
- N Choe
- Department of Pathology, Uniformed Services University of the Health Sciences, F. Edward Hébert School of Medicine, Bethesda, MD 20814-4799, USA
| | | | | | | | | | | |
Collapse
|