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Misumi I, Sato K, Nagano M, Korogi W, Usuku H, Kaikita K, Tsujita K. Similarity and simultaneity of triphasic mitral inflow and pulmonary venous flow in a patient with broad apical aneurysm. J Echocardiogr 2020; 20:59-61. [PMID: 33037997 DOI: 10.1007/s12574-020-00497-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 09/16/2020] [Accepted: 10/01/2020] [Indexed: 11/28/2022]
Affiliation(s)
- Ikuo Misumi
- Department of Cardiology, Kumamoto City Hospital, 4-1-60, Higashi-machi, Higashi-ku, Kumamoto City, Kumamoto, 862-8505, Japan.
| | - Koji Sato
- Department of Cardiology, Kumamoto City Hospital, 4-1-60, Higashi-machi, Higashi-ku, Kumamoto City, Kumamoto, 862-8505, Japan
| | - Miwa Nagano
- Department of Cardiology, Kumamoto City Hospital, 4-1-60, Higashi-machi, Higashi-ku, Kumamoto City, Kumamoto, 862-8505, Japan
| | - Wataru Korogi
- Department of Orthopedics, Kumamoto City Hospital, 4-1-60, Higashi-machi, Higashi-ku, Kumamoto City, Kumamoto, 862-8505, Japan
| | - Hiroki Usuku
- Department of Cardiovascular Medicine, Kumamoto University School of Medicine, 1-1-1 Honjo, Kumamoto, 860-8556, Japan
| | - Koichi Kaikita
- Department of Cardiovascular Medicine, Kumamoto University School of Medicine, 1-1-1 Honjo, Kumamoto, 860-8556, Japan
| | - Kenichi Tsujita
- Department of Cardiovascular Medicine, Kumamoto University School of Medicine, 1-1-1 Honjo, Kumamoto, 860-8556, Japan
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Korogi W, Yoshizawa T, Karim MF, Tanoue H, Yugami M, Sobuz SU, Hinoi E, Sato Y, Oike Y, Mizuta H, Yamagata K. SIRT7 is an important regulator of cartilage homeostasis and osteoarthritis development. Biochem Biophys Res Commun 2018; 496:S0006-291X(18)30144-X. [PMID: 29402405 DOI: 10.1016/j.bbrc.2018.01.129] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 01/20/2018] [Indexed: 11/21/2022]
Abstract
Sirtuins (SIRT1-7) are NAD+-dependent deacetylase/deacylases that regulate a wide variety of biological functions. Although the roles of sirtuins in cartilage homeostasis and cartilage diseases have been well studied, there is no information on the contribution of SIRT7 to cartilage homeostasis and osteoarthritis (OA) pathologies. Here, we demonstrate that Sirt7 knockout mice are resistant to the development of aging-associated OA and forced exercise-induced OA. Attenuation of Sirt7 in the murine chondrogenic cell line ATDC5 increased the deposition of a glycosaminoglycan-rich extracellular matrix and the mRNA expression of extracellular matrix components such as Col2a1 and Acan. Mechanistically, we found that SIRT7 suppressed the transcriptional activity of SOX9, which is an important transcription factor in chondrocytes, and that the enzymatic activity of SIRT7 was required for its function. Our results indicate that SIRT7 is a novel important regulator of cartilage homeostasis and OA development.
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Affiliation(s)
- Wataru Korogi
- Department of Medical Biochemistry, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan; Department of Orthopaedic Surgery, Faculty of Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Tatsuya Yoshizawa
- Department of Medical Biochemistry, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan.
| | - Md Fazlul Karim
- Department of Medical Biochemistry, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Hironori Tanoue
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Masaki Yugami
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Shihab U Sobuz
- Department of Medical Biochemistry, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Eiichi Hinoi
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology, Kanazawa, 920-1192, Japan
| | - Yoshifumi Sato
- Department of Medical Biochemistry, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Hiroshi Mizuta
- Department of Orthopaedic Surgery, Faculty of Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Kazuya Yamagata
- Department of Medical Biochemistry, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
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