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Nie X, Fan J, Dai B, Wen Z, Li H, Chen C, Wang DW. LncRNA CHKB-DT Downregulation Enhances Dilated Cardiomyopathy Through ALDH2. Circ Res 2024; 134:425-441. [PMID: 38299365 DOI: 10.1161/circresaha.123.323428] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 01/18/2024] [Indexed: 02/02/2024]
Abstract
BACKGROUND Human cardiac long noncoding RNA (lncRNA) profiles in patients with dilated cardiomyopathy (DCM) were previously analyzed, and the long noncoding RNA CHKB (choline kinase beta) divergent transcript (CHKB-DT) levels were found to be mostly downregulated in the heart. In this study, the function of CHKB-DT in DCM was determined. METHODS Long noncoding RNA expression levels in the human heart tissues were measured via quantitative reverse transcription-polymerase chain reaction and in situ hybridization assays. A CHKB-DT heterozygous or homozygous knockout mouse model was generated using the clustered regularly interspaced palindromic repeat (CRISPR)/CRISPR-associated protein 9 system, and the adeno-associated virus with a cardiac-specific promoter was used to deliver the RNA in vivo. Sarcomere shortening was performed to assess the primary cardiomyocyte contractility. The Seahorse XF cell mitochondrial stress test was performed to determine the energy metabolism and ATP production. Furthermore, the underlying mechanisms were explored using quantitative proteomics, ribosome profiling, RNA antisense purification assays, mass spectrometry, RNA pull-down, luciferase assay, RNA-fluorescence in situ hybridization, and Western blotting. RESULTS CHKB-DT levels were remarkably decreased in patients with DCM and mice with transverse aortic constriction-induced heart failure. Heterozygous knockout of CHKB-DT in cardiomyocytes caused cardiac dilation and dysfunction and reduced the contractility of primary cardiomyocytes. Moreover, CHKB-DT heterozygous knockout impaired mitochondrial function and decreased ATP production as well as cardiac energy metabolism. Mechanistically, ALDH2 (aldehyde dehydrogenase 2) was a direct target of CHKB-DT. CHKB-DT physically interacted with the mRNA of ALDH2 and fused in sarcoma (FUS) through the GGUG motif. CHKB-DT knockdown aggravated ALDH2 mRNA degradation and 4-HNE (4-hydroxy-2-nonenal) production, whereas overexpression of CHKB-DT reversed these molecular changes. Furthermore, restoring ALDH2 expression in CHKB-DT+/- mice alleviated cardiac dilation and dysfunction. CONCLUSIONS CHKB-DT is significantly downregulated in DCM. CHKB-DT acts as an energy metabolism-associated long noncoding RNA and represents a promising therapeutic target against DCM.
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MESH Headings
- Animals
- Humans
- Mice
- Adenosine Triphosphate/metabolism
- Aldehyde Dehydrogenase, Mitochondrial/genetics
- Aldehyde Dehydrogenase, Mitochondrial/metabolism
- Cardiomyopathy, Dilated/genetics
- Cardiomyopathy, Dilated/metabolism
- Down-Regulation
- In Situ Hybridization, Fluorescence
- Mice, Knockout
- Mitochondria, Heart/metabolism
- Myocytes, Cardiac/metabolism
- RNA, Long Noncoding/genetics
- RNA, Long Noncoding/metabolism
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Affiliation(s)
- Xiang Nie
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College (X.N., J.F., B.D., Z.W., H.L., C.C., D.W.W.), Huazhong University of Science and Technology, Wuhan, China
| | - Jiahui Fan
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College (X.N., J.F., B.D., Z.W., H.L., C.C., D.W.W.), Huazhong University of Science and Technology, Wuhan, China
| | - Beibei Dai
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College (X.N., J.F., B.D., Z.W., H.L., C.C., D.W.W.), Huazhong University of Science and Technology, Wuhan, China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders (B.D., Z.W., H.L.), Huazhong University of Science and Technology, Wuhan, China
| | - Zheng Wen
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College (X.N., J.F., B.D., Z.W., H.L., C.C., D.W.W.), Huazhong University of Science and Technology, Wuhan, China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders (B.D., Z.W., H.L.), Huazhong University of Science and Technology, Wuhan, China
| | - Huaping Li
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College (X.N., J.F., B.D., Z.W., H.L., C.C., D.W.W.), Huazhong University of Science and Technology, Wuhan, China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders (B.D., Z.W., H.L.), Huazhong University of Science and Technology, Wuhan, China
| | - Chen Chen
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College (X.N., J.F., B.D., Z.W., H.L., C.C., D.W.W.), Huazhong University of Science and Technology, Wuhan, China
| | - Dao Wen Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College (X.N., J.F., B.D., Z.W., H.L., C.C., D.W.W.), Huazhong University of Science and Technology, Wuhan, China
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