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Boutagy NE, Gamez-Mendez A, Fowler JW, Zhang H, Chaube BK, Esplugues E, Kuo A, Lee S, Horikami D, Zhang J, Citrin KM, Singh AK, Coon BG, Lee MY, Suarez Y, Fernandez-Hernando C, Sessa WC. Dynamic metabolism of endothelial triglycerides protects against atherosclerosis in mice. J Clin Invest 2024; 134:e170453. [PMID: 38175710 PMCID: PMC10866653 DOI: 10.1172/jci170453] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 12/20/2023] [Indexed: 01/05/2024] Open
Abstract
Blood vessels are continually exposed to circulating lipids, and elevation of ApoB-containing lipoproteins causes atherosclerosis. Lipoprotein metabolism is highly regulated by lipolysis, largely at the level of the capillary endothelium lining metabolically active tissues. How large blood vessels, the site of atherosclerotic vascular disease, regulate the flux of fatty acids (FAs) into triglyceride-rich (TG-rich) lipid droplets (LDs) is not known. In this study, we showed that deletion of the enzyme adipose TG lipase (ATGL) in the endothelium led to neutral lipid accumulation in vessels and impaired endothelial-dependent vascular tone and nitric oxide synthesis to promote endothelial dysfunction. Mechanistically, the loss of ATGL led to endoplasmic reticulum stress-induced inflammation in the endothelium. Consistent with this mechanism, deletion of endothelial ATGL markedly increased lesion size in a model of atherosclerosis. Together, these data demonstrate that the dynamics of FA flux through LD affects endothelial cell homeostasis and consequently large vessel function during normal physiology and in a chronic disease state.
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Affiliation(s)
- Nabil E. Boutagy
- Department of Pharmacology
- Vascular Biology and Therapeutics Program, and
| | - Ana Gamez-Mendez
- Department of Pharmacology
- Vascular Biology and Therapeutics Program, and
| | - Joseph W.M. Fowler
- Department of Pharmacology
- Vascular Biology and Therapeutics Program, and
| | - Hanming Zhang
- Vascular Biology and Therapeutics Program, and
- Department of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Bal K. Chaube
- Vascular Biology and Therapeutics Program, and
- Department of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Enric Esplugues
- Vascular Biology and Therapeutics Program, and
- Department of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Andrew Kuo
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Boston, Massachusetts, USA
| | - Sungwoon Lee
- Department of Pharmacology
- Vascular Biology and Therapeutics Program, and
| | - Daiki Horikami
- Department of Pharmacology
- Vascular Biology and Therapeutics Program, and
| | - Jiasheng Zhang
- Department of Cardiology, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Kathryn M. Citrin
- Vascular Biology and Therapeutics Program, and
- Department of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Abhishek K. Singh
- Department of Pharmacology
- Vascular Biology and Therapeutics Program, and
| | - Brian G. Coon
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Monica Y. Lee
- Department of Physiology and Biophysics, Center for Cardiovascular Research, University of Illinois at Chicago School of Medicine, Chicago, Illinois, USA
| | - Yajaira Suarez
- Vascular Biology and Therapeutics Program, and
- Department of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
- Department of Pathology, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Carlos Fernandez-Hernando
- Vascular Biology and Therapeutics Program, and
- Department of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
- Department of Pathology, Yale University School of Medicine, New Haven, Connecticut, USA
| | - William C. Sessa
- Department of Pharmacology
- Vascular Biology and Therapeutics Program, and
- Department of Cardiology, Yale University School of Medicine, New Haven, Connecticut, USA
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2
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Nakajima K, Miyauchi H, Hirano KI, Fujimoto S, Kawahito M, Iimori T, Kudo T. Practice recommendation for measuring washout rates in 123I-BMIPP fatty acid images. Ann Nucl Med 2024; 38:1-8. [PMID: 37691078 PMCID: PMC10766729 DOI: 10.1007/s12149-023-01863-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 08/01/2023] [Indexed: 09/12/2023]
Abstract
The purpose of this practice recommendation is to specifically identify the critical steps involved in performing and interpreting 123I-β-methyl-iodophenyl-pentadecanoic acid (BMIPP) single-photon emission computed tomography (SPECT) and measurement of washout rate (WR) from the heart. This document will cover backgrounds, patient preparation, testing procedure, visual image interpretation, quantitation methods using planar and SPECT studies, and reporting of WR. The pitfall and some tips for the calculation of 123I-BMIPP WR are also included. The targets of global and regional WR calculation include ischemic heart disease, cardiomyopathy, heart failure, and triglyceride deposit cardiomyovasculopathy, an emerging rare heart disease.
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Affiliation(s)
- Kenichi Nakajima
- Department of Functional Imaging and Artificial Intelligence, Kanazawa University, 13-1 Takara-Machi, Kanazawa, 920-8640, Japan.
| | - Hideyuki Miyauchi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Ken-Ichi Hirano
- Department of Triglyceride Science, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Shinichiro Fujimoto
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Michitomo Kawahito
- Department of Cardiology, Shizuoka City Shizuoka Hospital, Shizuoka, Japan
| | - Takashi Iimori
- Department of Radiation Technology, Chiba University Hospital, Chiba, Japan
| | - Takashi Kudo
- Department of Radioisotope Medicine, Atomic Bomb Disease and Hibakusha Medicine Unit, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
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3
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Nakajima K, Miyauchi H, Hirano KI, Fujimoto S, Kawahito M, Iimori T, Kudo T. Practice Recommendation for Measuring Washout Rates in 123I-BMIPP Fatty Acid Images. ANNALS OF NUCLEAR CARDIOLOGY 2023; 9:3-10. [PMID: 38058580 PMCID: PMC10696152 DOI: 10.17996/anc.23-00005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/19/2023] [Accepted: 07/20/2023] [Indexed: 12/08/2023]
Abstract
The purpose of this practice recommendation is to specifically identify the critical steps involved in performing and interpreting 123I-β-methyl-iodophenyl-pentadecanoic acid (BMIPP) single-photon emission computed tomography (SPECT) and measurement of washout rate (WR) from the heart. This document will cover backgrounds, patient preparation, testing procedure, visual image interpretation, quantitation methods using planar and SPECT studies, and reporting of WR. The pitfall and some tips for the calculation of 123I-BMIPP WR are also included. The targets of global and regional WR calculation include ischemic heart disease, cardiomyopathy, heart failure, and triglyceride deposit cardiomyovasculopathy, an emerging rare heart disease.
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Affiliation(s)
- Kenichi Nakajima
- Department of Functional Imaging and Artificial Intelligence, Kanazawa University, Japan
| | - Hideyuki Miyauchi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Japan
| | - Ken-ichi Hirano
- Department of Triglyceride Science, Graduate School of Medicine, Osaka University, Japan
| | - Shinichiro Fujimoto
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, Japan
| | | | - Takashi Iimori
- Department of Radiation Technology, Chiba University Hospital, Japan
| | - Takashi Kudo
- Department of Radioisotope Medicine, Atomic Bomb Disease and Hibakusha Medicine Unit, Atomic Bomb Disease Institute, Nagasaki University, Japan
| | - Japanese Society of Nuclear Cardiology working group
- Department of Functional Imaging and Artificial Intelligence, Kanazawa University, Japan
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Japan
- Department of Triglyceride Science, Graduate School of Medicine, Osaka University, Japan
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, Japan
- Department of Cardiology, Shizuoka City Shizuoka Hospital, Japan
- Department of Radiation Technology, Chiba University Hospital, Japan
- Department of Radioisotope Medicine, Atomic Bomb Disease and Hibakusha Medicine Unit, Atomic Bomb Disease Institute, Nagasaki University, Japan
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4
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Hirano KI, Miyauchi H, Nakano Y, Kawaguchi Y, Okamura S, Nishimura Y, Onishi T, Fujimoto S, Yamada T, Amano T. Overall Survival Rate of Patients With Triglyceride Deposit Cardiomyovasculopathy. JACC. ADVANCES 2023; 2:100347. [PMID: 38938259 PMCID: PMC11198209 DOI: 10.1016/j.jacadv.2023.100347] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Affiliation(s)
- Ken-ichi Hirano
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics (CNT) and Triglyceride Research Center (TGRC), Department of Triglyceride Science, Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka 565-0874, Japan.
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5
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Satake A, Nakano Y, Niwa T, Ando H, Takashima H, Amano T. Rheocarna ® as an alternative therapeutic option for patients with chronic limb-threatening ischemia: A case report. SAGE Open Med Case Rep 2023; 11:2050313X221149359. [PMID: 36686205 PMCID: PMC9850122 DOI: 10.1177/2050313x221149359] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 12/16/2022] [Indexed: 01/19/2023] Open
Abstract
Recently, a new low-density lipoprotein apheresis device (Rheocarna®; Kaneka Corporation, Osaka, Japan), a blood purification therapy, was approved in Japan for managing chronic limb-threatening ischemia with refractory ulcers. Here, we describe a case of chronic limb-threatening ischemia that was treated with the Rheocarna. A 65-year-old Asian man with an ulcer on the right heel was admitted to our hospital. Angiography revealed chronic total occlusion with severe calcification of the anterior tibial, peroneal, and posterior tibial arteries. The patient underwent distal bypass of the saphenous vein; however, the bypass was occluded in the early postoperative period. The Rheocarna was used, and the ulcers improved significantly postoperatively. Although endovascular treatment was eventually performed on the occluded bypass graft to completely heal the ulcer, the Rheocarna could be an alternative treatment option in challenging cases of chronic limb-threatening ischemia.
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Affiliation(s)
- Akinori Satake
- Department of Cardiology, Narita
Memorial Hospital, Toyohashi, Japan
| | - Yusuke Nakano
- Department of Cardiology, Aichi Medical
University, Nagakute, Japan,Yusuke Nakano, Department of Cardiology,
Aichi Medical University, 1-1 Yazakokarimata, Nagakute 480-1195, Aichi, Japan.
| | - Toru Niwa
- Department of Cardiology, Narita
Memorial Hospital, Toyohashi, Japan
| | - Hirohiko Ando
- Department of Cardiology, Aichi Medical
University, Nagakute, Japan
| | | | - Tetsuya Amano
- Department of Cardiology, Aichi Medical
University, Nagakute, Japan
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6
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Chen Z, Nakajima K, Hirano KI, Kamiya T, Yoshida S, Saito S, Kinuya S. Methods of calculating 123I-β-methyl-P-iodophenyl-pentadecanoic acid washout rates in triglyceride deposit cardiomyovasculopathy. Ann Nucl Med 2022; 36:986-997. [PMID: 36155888 PMCID: PMC9587944 DOI: 10.1007/s12149-022-01787-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/14/2022] [Indexed: 11/29/2022]
Abstract
Objective This study aimed to optimize various methods of calculating washout rates (WRs) of 123I-β-methyl-p-iodophenyl-pentadecanoic (BMIPP), as they are essential to diagnose triglyceride deposit cardiomyovasculopathy (TGCV) which is a rare disease entity identified in Japan and has been encoded in Orphanet (ORPHA code 565612). Methods We calculated WRs of 123I-BMIPP from early (20 min) and delayed (200 min) images. We evaluated six methods of calculating WRs to discriminate TGVC patients (age, 56.8 ± 14.6 y; male, n = 13; female, n = 4) and 21 123I-BMIPP studies were involved including 4 follow-up studies. Washout rates were calculated by two planar methods using anterior images with cardiac and background regions of interest (ROIs) and by four SPECT methods using either array and polar plots or summed short-axis images. The final diagnoses of TGCV were confirmed according to the 2020 diagnostic criteria, and the diagnostic accuracy of WRs calculated using the six methods was analyzed using the area under receiver-operating characteristics curves (ROC-AUC). Multiple scatter-plot matrix methods were evaluated with correlations for comparison. Results All six methods were useful for diagnosis and did not significantly differ. The four SPECT methods showed excellent diagnostic accuracy (AUC 1.0), whereas the planar methods with and without background correction could be acceptable (AUC 0.857 and 0.964, respectively). The WRs were relatively lower for patients with CAD and remarkable metabolic defects than for patients with TGCV but without defects. Conclusions For the diagnosis of TGCV, the WR cutoff of 10% of 123I-BMIPP functioned well in planar and SPECT discrimination based on computational methods as a classifier. However, calculation optimization should improve TGCV diagnoses.
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Affiliation(s)
- Zhuoqing Chen
- Department of Nuclear Medicine, Kanazawa University, Kanazawa, Ishikawa Japan
| | - Kenichi Nakajima
- Department of Functional Imaging and Artificial Intelligence, Kanazawa University, Kanazawa, Ishikawa 920-8640 Japan
| | - Ken-ichi Hirano
- Department of Triglyceride Science, Graduate School of Medicine, Osaka University, Suita, Osaka Japan
| | - Takashi Kamiya
- Department of Medical Technology, Osaka University Hospital, Suita, Osaka Japan
| | - Shohei Yoshida
- Department of Cardiology, Kanazawa University Hospital, Kanazawa, Ishikawa Japan
| | - Shintaro Saito
- Department of Nuclear Medicine, Kanazawa University, Kanazawa, Ishikawa Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine, Kanazawa University, Kanazawa, Ishikawa Japan
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7
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Miyauchi H, Hirano KI, Nakano Y, Shimada K, Nishikawa M, Yamamoto H, Nakamura A, Miyake A, Aoshima C, Fujimoto S, Nakatani D, Yamada T, Amano T, Nakajima K. 123I-BMIPP Scintigraphy Shows That CNT-01 (Tricaprin) Improves Myocardial Lipolysis in Patients with Idiopathic Triglyceride Deposit Cardiomyovasculopathy: First Randomized Controlled, Exploratory Trial for TGCV. ANNALS OF NUCLEAR CARDIOLOGY 2022; 8:67-75. [PMID: 36540180 PMCID: PMC9749752 DOI: 10.17996/anc.22-00167] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/26/2022] [Accepted: 07/27/2022] [Indexed: 04/27/2023]
Abstract
Background: Triglyceride deposit cardiomyovasculopathy (TGCV) is a rare intractable cardiovascular disorder (Orphanet ORPHAcode: 565612) in which defective intracellular lipolysis results in heart failure and coronary artery disease. Myocardial scintigraphy with 123I-β-methyl-p-iodophenylpentadecanoic acid (BMIPP) is useful to evaluate myocardial TG metabolism; its washout rate (WR) reflects myocardial lipolysis. This study reports the effects of CNT-01 (tricaprin), a developing orphan drug to facilitate lipolysis, on BMIPP-WR in patients with TGCV. Methods: An investigator-initiated, multicenter, randomized, double-blind exploratory, trial (Phase IIa) was conducted (UMIN000035403). Seventeen patients with idiopathic TGCV were orally administered 1.5 g/day of CNT-01 or placebo for 8 weeks. Endpoints included delta BMIPP-WR and clinical parameters such as 6-minwalk distance and TGCV severity score. Results: During the protocol, delta BMIPP-WRs were -0.26±3.28 and 7.08±3.28% (95% confidence intervals, -7.36 to 6.84 and -0.01 to 14.18) in the placebo and CNT-01 groups, respectively. The baseline-adjusted difference of delta BMIPP-WR between the two groups was significant (p=0.035) after one patient was excluded from the placebo group because of pseudonormalization of BMIPP-WR related to coronary bypass graft stenosis. Clinical parameters did not show significant changes. Conclusions: This study proved the mechanism of CNT-01 to improve myocardial lipolysis in TGCV, as demonstrated by BMIPP scintigraphy.
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Affiliation(s)
- Hideyuki Miyauchi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Ken-Ichi Hirano
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics (CNT) and Triglyceride Research Center (TGRC), Department of Triglyceride Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Yusuke Nakano
- Department of Cardiology, Aichi Medical University, Aichi, Japan
| | - Kazunori Shimada
- Department of Cardiovascular Biology Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | | | - Hiroyuki Yamamoto
- Department of Cardiovascular Medicine, Narita-Tomisato Tokushukai Hospital, Chiba, Japan
| | - Ayumi Nakamura
- Department of Pharmacy, Osaka University Hospital, Osaka, Japan
- Department of Medical Innovation, Osaka University Hospital, Osaka, Japan
| | - Akimitsu Miyake
- Department of Cardiovascular Medicine, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Chihiro Aoshima
- Department of Cardiovascular Biology Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Shinichiro Fujimoto
- Department of Cardiovascular Biology Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Daisaku Nakatani
- Department of Cardiovascular Medicine, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Tomomi Yamada
- Department of Medical Innovation, Osaka University Hospital, Osaka, Japan
| | - Tetsuya Amano
- Department of Cardiology, Aichi Medical University, Aichi, Japan
| | - Kenichi Nakajima
- Department of Functional Imaging and Artificial Intelligence, Kanazawa University, Kanazawa, Ishikawa, Japan
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8
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Nagasawa Y, Okumura T, Hara Y, Kondo T, Hasegawa M, Ikeda Y, Murohara T, Hirano KI. Genetic Deficiency of Adipose Triglyceride Lipase Is Associated With a Novel Type of Podocytopathy. Kidney Int Rep 2021; 6:2722-2725. [PMID: 34622112 PMCID: PMC8484112 DOI: 10.1016/j.ekir.2021.07.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/18/2021] [Accepted: 07/12/2021] [Indexed: 11/22/2022] Open
Affiliation(s)
- Yasuyuki Nagasawa
- Hyogo College of Medicine, Department of Medicine, Division of Kidney and Dialysis 1-1, Mukogawa-Cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Takahiro Okumura
- Department of Cardiology, Nagoya University Graduate, School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Yasuhiro Hara
- Laboratory of Cardiovascular Disease, Novel, Noninvasive, and Nutritional Therapeutics (CNT) and Triglyceride Research Center (TGRC), Department of Triglyceride Science, Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka 565-0874, Japan
| | - Toru Kondo
- Department of Cardiology, Nagoya University Graduate, School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Midori Hasegawa
- Department of Nephrology, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukakecho, Toyoakeshi, Aichi 470-1192, Japan
| | - Yoshihiko Ikeda
- Division of Pathology, National Cerebral and Cardiovascular Center Hospital, Suita, Japan
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate, School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Ken-Ichi Hirano
- Laboratory of Cardiovascular Disease, Novel, Noninvasive, and Nutritional Therapeutics (CNT) and Triglyceride Research Center (TGRC), Department of Triglyceride Science, Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka 565-0874, Japan
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9
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Otto CM. Heartbeat: an increase in preventable cardiovascular deaths during the COVID-19 pandemic due to avoidance of medical care. Heart 2021; 107:89-90. [PMID: 33443018 DOI: 10.1136/heartjnl-2020-318759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Catherine M Otto
- Division of Cardiology, University of Washington, Seattle, WA 98195, USA
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10
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Noguchi H, Yamada S, Hirano KI, Yamaguchi S, Suzuki A, Guo X, Zaima N, Li M, Kobayashi K, Ikeda Y, Nakayama T, Sasaguri Y. Outside-in signaling by femoral cuff injury induces a distinct vascular lesion in adipose triglyceride lipase knockout mice. Histol Histopathol 2020; 36:91-100. [PMID: 33231284 DOI: 10.14670/hh-18-285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Genetic deficiency of adipose triglyceride lipase (ATGL), a rate-limiting enzyme for intracellular triglyceride (TG) hydrolysis, causes TG-deposit cardiomyovasculopathy (TGCV), a recently identified rare cardiovascular disorder (ORPHA code: 565612) in humans. One of the major characteristics of TGCV is a novel type of diffuse and concentric coronary atherosclerosis with ATGL-deficient smooth muscle cells (SMCs). Patients with TGCV have intractable coronary artery disease. Therefore, it is crucial to investigate the mechanisms underlying vascular lesions in ATGL deficiency using animal models. Cuff injury is an experimental procedure to induce vascular remodeling with neointimal formation with SMCs after placing a cuff around the adventitial side of the artery without direct influence on endothelium. We report the effect of cuff injury on femoral arteries of ATGL-knockout (ATGL⁻/⁻) mice. Cuff-induced concentric neointimal formation with migrating SMCs was exacerbated in ATGL⁻/⁻ mice, mimicking atherosclerotic lesions in patients with TGCV. In the media, cell death of SMCs and loss of elastic fibers increased. Perivascular infiltrating cells expressing tumor necrosis factor-α (TNF-α) were more prominent in ATGL⁻/⁻ mice than in wild-type (WT) mice. In Boyden chamber experiments, a greater number of ATGL⁻/⁻ SMCs migrated in response to TNF-α compared to WT SMCs. These data, for the first time, demonstrated that outside-in signaling by cuff-induced neointimal formation where paracrine stimuli from adventitial infiltrating cells may lead to neointimal formation and mediolysis in ATGL-deficient conditions. Cuff injury might be a valuable model for understanding the mechanisms underlying the development of atherosclerotic lesions in patients with TGCV.
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Affiliation(s)
- Hirotsugu Noguchi
- Department of Pathology, School of Medicine, University of Occupational and Environmental Health, Kagoshima, Japan.,Department of Pathology, Field of Oncology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Sohsuke Yamada
- Department of Pathology, School of Medicine, University of Occupational and Environmental Health, Kagoshima, Japan.,Department of Pathology and Laboratory Medicine, Kanazawa Medical University, Kanazawa, Japan
| | - Ken-Ichi Hirano
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics (CNT) and Triglyceride Research Center (TGRC), Department of Triglyceride Science, Graduate School of Medicine, Osaka University, Osaka, Japan.
| | - Satoshi Yamaguchi
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics (CNT) and Triglyceride Research Center (TGRC), Department of Triglyceride Science, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Akira Suzuki
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics (CNT) and Triglyceride Research Center (TGRC), Department of Triglyceride Science, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Xin Guo
- Department of Pathology and Laboratory Medicine, Kanazawa Medical University, Kanazawa, Japan
| | - Nobuhiro Zaima
- Department of Applied Biological Chemistry, Graduate School of Agriculture, Kindai University, Kindai, Japan.,Agricultural Technology and Innovation Research Institute, Kindai University, Kindai, Japan
| | - Ming Li
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics (CNT) and Triglyceride Research Center (TGRC), Department of Triglyceride Science, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Kunihisa Kobayashi
- Department of Endocrinology and Diabetes Mellitus, Fukuoka University Chikushi Hospital, Fukuoka, Japan
| | - Yoshihiko Ikeda
- Department of Pathology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Toshiyuki Nakayama
- Department of Pathology, School of Medicine, University of Occupational and Environmental Health, Kagoshima, Japan
| | - Yasuyuki Sasaguri
- Department of Pathology, School of Medicine, University of Occupational and Environmental Health, Kagoshima, Japan
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11
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Affiliation(s)
- Kenichi Nakajima
- Department of Functional Imaging and Artificial Intelligence, Kanazawa University, Kanazawa, Ishikawa, Japan
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