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Xu S, Offermanns S. Endothelial lipid droplets drive atherosclerosis and arterial hypertension. Trends Endocrinol Metab 2024; 35:453-455. [PMID: 38431437 DOI: 10.1016/j.tem.2024.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 02/16/2024] [Accepted: 02/19/2024] [Indexed: 03/05/2024]
Abstract
Lipid droplets (LDs) are essential for cellular pathophysiology. In two recent reports, Kim et al. and Boutagy et al. show that accumulation of LDs in endothelial cells (ECs) elevates blood pressure and accelerates progression of atherosclerosis. These findings identify a novel mechanism of EC lipid metabolism which drives cardiometabolic diseases.
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Affiliation(s)
- Suowen Xu
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany; Department of Endocrinology, Institute of Endocrine and Metabolic Diseases, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.
| | - Stefan Offermanns
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany; Center for Molecular Medicine, Goethe University Frankfurt, 60590 Frankfurt, Germany
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2
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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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3
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Gao P, Fang L, Pan Y, Jiang L. Effect of Grape Seed Proanthocyanidins on Fat Metabolism and Adipocytokines in Obese Rats. Metabolites 2023; 13:metabo13040568. [PMID: 37110226 PMCID: PMC10142576 DOI: 10.3390/metabo13040568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/26/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
This study aimed to investigate the effect of Grape Seed Proanthocyanidin (GSP) on fat metabolism and adipocytokines in obese rats. Fifty 5-week-old rats were randomly assigned to five groups (n = 10 per group) and given either a basal diet, a high-fat diet, or a high-fat diet supplemented with GSP (25, 50, and 100 mg/d) per group. The experiment lasted for five weeks, including a one-week adaptation period and a four-week treatment period. At the end of the experimental period, serum and adipose tissue samples were collected and analyzed. Additionally, we co-cultured 3T3-L1 preadipocytes with varying concentrations of GSP to explore its effect on adipocyte metabolism. The results demonstrated that GSP supplementation reduced weight, daily gain, and abdominal fat weight coefficient (p < 0.05). It also decreased levels of glucose, cholesterol (TC) (p < 0.05), triglycerides (TG) (p < 0.05), low-density lipoprotein (LDL), cyclooxygenase-2 (COX-2), and interleukin-6 (IL-6) in adipose tissue. Furthermore, GSP addition caused adipocyte crumpling in vitro and reduced the mRNA expression of COX-2, LEP, and TNF-α in adipocytes in vitro. These findings provide compelling evidence for exploring the role of GSP in the prevention and treatment of obesity and related diseases.
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Affiliation(s)
- Pengxiang Gao
- Department of Animal Science, Animal Science and Technology College, Beijing University of Agriculture, Beijing 102206, China
| | - Luoyun Fang
- Department of Animal Science, Animal Science and Technology College, Beijing University of Agriculture, Beijing 102206, China
| | - Yucong Pan
- Department of Animal Science, Animal Science and Technology College, Beijing University of Agriculture, Beijing 102206, China
| | - Linshu Jiang
- Department of Animal Science, Animal Science and Technology College, Beijing University of Agriculture, Beijing 102206, China
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4
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Pacia MZ, Chorazy N, Sternak M, Wojnar-Lason K, Chlopicki S. Vascular lipid droplets formed in response to TNF, hypoxia or OA: biochemical composition and prostacyclin generation. J Lipid Res 2023; 64:100355. [PMID: 36934842 DOI: 10.1016/j.jlr.2023.100355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 02/22/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
Biogenesis of lipid droplets (LDs) in various cells plays an important role in various physiological and pathological processes. However, the function of LDs in endothelial physiology and pathology is not well understood. In the present work, we investigated the formation of LDs and prostacyclin (PGI2) generation in the vascular tissue of isolated murine aortas following activation by pro-inflammatory factors: tumor necrosis factor (TNF), lipopolysaccharides (LPS), angiotensin II (AngII), hypoxic conditions, or oleic acid (OA). The abundance, size, and biochemical composition of LDs was characterized based on Raman spectroscopy and fluorescence imaging. We found that blockade of lipolysis by the adipose triglyceride lipase (ATGL) delayed LDs degradation and simultaneously blunted PGI2 generation in aorta treated with all tested pro-inflammatory stimuli. Furthermore, the analysis of Raman spectra of LDs in the isolated vessels stimulated by TNF, LPS, AngII, or hypoxia uncovered that these LDs were all rich in highly unsaturated lipids and had a negligible content of phospholipids and cholesterols. Additionally, by comparing the Raman signature of endothelial LDs under hypoxic or OA-overload conditions in the presence or absence of ATGL inhibitor, atglistatin, we show that atglistatin does not affect the biochemical composition of LDs. Altogether, independent of whether LDs were induced by pro-inflammatory stimuli, hypoxia, or oleic acid, and of whether they were composed of highly unsaturated or less unsaturated lipids, we observed LDs formation invariably associated with ATGL-dependent PGI2 generation. In conclusion, vascular LDs formation and ATGL-dependent PGI2 generation represent a universal response to vascular pro-inflammatory insult.
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Affiliation(s)
- Marta Z Pacia
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14, Bobrzynskiego Str., 30-348 Krakow, Poland.
| | - Natalia Chorazy
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14, Bobrzynskiego Str., 30-348 Krakow, Poland
| | - Magdalena Sternak
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14, Bobrzynskiego Str., 30-348 Krakow, Poland
| | - Kamila Wojnar-Lason
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14, Bobrzynskiego Str., 30-348 Krakow, Poland; Chair of Pharmacology, Jagiellonian University, 16 Grzegorzecka Str., 31-531 Krakow, Poland
| | - Stefan Chlopicki
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14, Bobrzynskiego Str., 30-348 Krakow, Poland; Chair of Pharmacology, Jagiellonian University, 16 Grzegorzecka Str., 31-531 Krakow, Poland
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5
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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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6
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Li CW, Yu K, Shyh-Chang N, Jiang Z, Liu T, Ma S, Luo L, Guang L, Liang K, Ma W, Miao H, Cao W, Liu R, Jiang LJ, Yu SL, Li C, Liu HJ, Xu LY, Liu RJ, Zhang XY, Liu GS. Pathogenesis of sarcopenia and the relationship with fat mass: descriptive review. J Cachexia Sarcopenia Muscle 2022; 13:781-794. [PMID: 35106971 PMCID: PMC8977978 DOI: 10.1002/jcsm.12901] [Citation(s) in RCA: 165] [Impact Index Per Article: 82.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 10/26/2021] [Accepted: 11/28/2021] [Indexed: 02/06/2023] Open
Abstract
Age-associated obesity and muscle atrophy (sarcopenia) are intimately connected and are reciprocally regulated by adipose tissue and skeletal muscle dysfunction. During ageing, adipose inflammation leads to the redistribution of fat to the intra-abdominal area (visceral fat) and fatty infiltrations in skeletal muscles, resulting in decreased overall strength and functionality. Lipids and their derivatives accumulate both within and between muscle cells, inducing mitochondrial dysfunction, disturbing β-oxidation of fatty acids, and enhancing reactive oxygen species (ROS) production, leading to lipotoxicity and insulin resistance, as well as enhanced secretion of some pro-inflammatory cytokines. In turn, these muscle-secreted cytokines may exacerbate adipose tissue atrophy, support chronic low-grade inflammation, and establish a vicious cycle of local hyperlipidaemia, insulin resistance, and inflammation that spreads systemically, thus promoting the development of sarcopenic obesity (SO). We call this the metabaging cycle. Patients with SO show an increased risk of systemic insulin resistance, systemic inflammation, associated chronic diseases, and the subsequent progression to full-blown sarcopenia and even cachexia. Meanwhile in many cardiometabolic diseases, the ostensibly protective effect of obesity in extremely elderly subjects, also known as the 'obesity paradox', could possibly be explained by our theory that many elderly subjects with normal body mass index might actually harbour SO to various degrees, before it progresses to full-blown severe sarcopenia. Our review outlines current knowledge concerning the possible chain of causation between sarcopenia and obesity, proposes a solution to the obesity paradox, and the role of fat mass in ageing.
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Affiliation(s)
- Chun-Wei Li
- Department of Clinical Nutrition & Health Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Kang Yu
- Department of Clinical Nutrition & Health Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ng Shyh-Chang
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Zongmin Jiang
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Taoyan Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Shilin Ma
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Lanfang Luo
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Lu Guang
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Kun Liang
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Wenwu Ma
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Hefan Miao
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Wenhua Cao
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Ruirui Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Ling-Juan Jiang
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Song-Lin Yu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Chao Li
- Department of General Surgery, Tianjin Union Medical Center, The Affiliated Hospital of Nankai University, China (Tianjin Union Medical Center, Tianjin, China
| | - Hui-Jun Liu
- Department of nursing & Clinical Nutrition, Dongzhimen Hospital, Beijing University of Traditional Chinese Medicine, Beijing, China
| | - Long-Yu Xu
- Department of Sport Physiatry, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Rong-Ji Liu
- Department of Pharmacy, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xin-Yuan Zhang
- Department of stomatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Gao-Shan Liu
- Department of Health Education, Shijingshan Center for Disease Prevention and Control, Beijing, China
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7
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Onishi T, Nakano Y, Hirano KI, Nagasawa Y, Niwa T, Tajima A, Ishii H, Takahashi H, Sakurai S, Ando H, Takashima H, Amano T. Prevalence and clinical outcomes of triglyceride deposit cardiomyovasculopathy among haemodialysis patients. Heart 2021; 107:127-134. [PMID: 32998957 PMCID: PMC7788260 DOI: 10.1136/heartjnl-2020-317672] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 08/21/2020] [Accepted: 08/25/2020] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE To evaluate the effect of triglyceride deposit cardiomyovasculopathy (TGCV) on the cardiovascular outcomes in haemodialysis (HD) patients with suspected coronary artery disease (CAD). METHODS This retrospective single-centre observational study included data from the cardiac catheter database of Narita Memorial Hospital between April 2011 and March 2017. Among 654 consecutive patients on HD, the data for 83 patients with suspected CAD who underwent both [123I]-β-methyl-iodophenyl-pentadecanoic acid scintigraphy and coronary angiography were analysed. Patients were divided into three groups: definite TGCV (17 patients), probable TGCV (22 patients) and non-TGCV control group (44 patients). The primary endpoint was a composite of cardiovascular death, non-fatal myocardial infarction and non-fatal stroke assessed for up to 5 years of follow-up. RESULTS The prevalence of definite TGCV was approximately 20% and 2.6% among consecutive HD patients with suspected CAD and among all HD patients, respectively. At the end of the median follow-up period of 4.7 years, the primary endpoint was achieved in 52.9% of the definite TGCV patients (HR, 7.45; 95% CI: 2.28 to 24.3; p<0.001) and 27.3% of the probable TGCV patients (HR, 3.28; 95% CI: 0.93 to 11.6; p=0.066), compared with that in 9.1% of the non-TGCV control patients. Definite TGCV was significantly and independently associated with cardiovascular mortality and outcomes among HD patients in all multivariate models. CONCLUSIONS TGCV is not uncommon in HD patients and is associated with an increased risk of cardiovascular events including cardiovascular death. Thus, TGCV might be a potential therapeutic target.
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Affiliation(s)
- Tomohiro Onishi
- Department of Cardiology, Aichi Medical University, Nagakute, Japan
| | - Yusuke Nakano
- Department of Cardiology, Aichi Medical University, Nagakute, Japan
| | - Ken-Ichi Hirano
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Yasuyuki Nagasawa
- Department of Internal Medicine, Division of Cardiology, Kidney and Dialysis, Hyogo College of Medicine, Nishinomiya, Japan
| | - Toru Niwa
- Narita Memorial Hospital, Toyohashi, Japan
| | | | - Hideki Ishii
- Department of Cardiology, Fujita Health University Bantane Hospital, Nagoya, 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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8
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Jarc E, Petan T. A twist of FATe: Lipid droplets and inflammatory lipid mediators. Biochimie 2020; 169:69-87. [DOI: 10.1016/j.biochi.2019.11.016] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 11/25/2019] [Indexed: 12/14/2022]
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9
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Investigation of the Impact of Streptococcus pneumoniae on A549 Pneumocytes. Jundishapur J Microbiol 2019. [DOI: 10.5812/jjm.90811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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10
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Li M, Hirano KI, Ikeda Y, Higashi M, Hashimoto C, Zhang B, Kozawa J, Sugimura K, Miyauchi H, Suzuki A, Hara Y, Takagi A, Ikeda Y, Kobayashi K, Futsukaichi Y, Zaima N, Yamaguchi S, Shrestha R, Nakamura H, Kawaguchi K, Sai E, Hui SP, Nakano Y, Sawamura A, Inaba T, Sakata Y, Yasui Y, Nagasawa Y, Kinugawa S, Shimada K, Yamada S, Hao H, Nakatani D, Ide T, Amano T, Naito H, Nagasaka H, Kobayashi K. Triglyceride deposit cardiomyovasculopathy: a rare cardiovascular disorder. Orphanet J Rare Dis 2019; 14:134. [PMID: 31186072 PMCID: PMC6560904 DOI: 10.1186/s13023-019-1087-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 05/01/2019] [Indexed: 12/25/2022] Open
Abstract
Triglyceride deposit cardiomyovasculopathy (TGCV) is a phenotype primarily reported in patients carrying genetic mutations in PNPLA2 encoding adipose triglyceride lipase (ATGL) which releases long chain fatty acid (LCFA) as a major energy source by the intracellular TG hydrolysis. These patients suffered from intractable heart failure requiring cardiac transplantation. Moreover, we identified TGCV patients without PNPLA2 mutations based on pathological and clinical studies. We provided the diagnostic criteria, in which TGCV with and without PNPLA2 mutations were designated as primary TGCV (P-TGCV) and idiopathic TGCV (I-TGCV), respectively. We hereby report clinical profiles of TGCV patients. Between 2014 and 2018, 7 P-TGCV and 18 I-TGCV Japanese patients have been registered in the International Registry. Patients with I-TGCV, of which etiologies and causes are not known yet, suffered from adult-onset severe heart disease, including heart failure and coronary artery disease, associated with a marked reduction in ATGL activity and myocardial washout rate of LCFA tracer, as similar to those with P-TGCV. The present first registry-based study showed that TGCV is an intractable, at least at the moment, and heterogeneous cardiovascular disorder.
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Affiliation(s)
- Ming Li
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics and Triglyceride Research Center (TGRC), Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka, 565-0874, Japan
| | - Ken-Ichi Hirano
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics and Triglyceride Research Center (TGRC), Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka, 565-0874, Japan.
| | - Yoshihiko Ikeda
- Department of Pathology, National Cerebral and Cardiovascular Center, 5-7-1, Fujishirodai, Suita, Osaka, 565-8565, Japan
| | - Masahiro Higashi
- Department of Radiology, National Hospital Organization Osaka National Hospital, 2-1-14, Hoenzaka, Chuo-ku, Osaka, 540-0006, Japan
| | - Chikako Hashimoto
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics and Triglyceride Research Center (TGRC), Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka, 565-0874, Japan
| | - Bo Zhang
- Department of Biochemistry, Fukuoka University Medical School, 7-45-1, Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Junji Kozawa
- Department of Metabolic Medicine, Graduate School of Medicine, Osaka University, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Koichiro Sugimura
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, 1-1, Seiryomachi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Hideyuki Miyauchi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, 1-8-1, Inohara, Chuo-ku, Chiba, 260-8670, Japan
| | - Akira Suzuki
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics and Triglyceride Research Center (TGRC), Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka, 565-0874, Japan
| | - Yasuhiro Hara
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics and Triglyceride Research Center (TGRC), Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka, 565-0874, Japan
| | - Atsuko Takagi
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics and Triglyceride Research Center (TGRC), Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka, 565-0874, Japan
| | - Yasuyuki Ikeda
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics and Triglyceride Research Center (TGRC), Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka, 565-0874, Japan
| | - Kazuhiro Kobayashi
- Division of Molecular Brain Science, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Yoshiaki Futsukaichi
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics and Triglyceride Research Center (TGRC), Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka, 565-0874, Japan
| | - Nobuhiro Zaima
- Department of Applied Biological Chemistry, Graduate School of Agriculture, Kindai University, 3327-204, Nakamachi, Nara, 631-8505, Japan
| | - Satoshi Yamaguchi
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics and Triglyceride Research Center (TGRC), Graduate School of Medicine, Osaka University, 6-2-4, Furuedai, Suita, Osaka, 565-0874, Japan
| | - Rojeet Shrestha
- Faculty of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Sapporo, 060-0812, Japan
| | - Hiroshi Nakamura
- Kure Medical Center and Chugoku Cancer Center, National Hospital Organization, 3-1, Aoyama-cho, Kure, Hiroshima, 737-0023, Japan
| | - Katsuhiro Kawaguchi
- Department of Cardiovascular Medicine, Komaki City Hospital, 1-20, Jobushi, Komaki, Aichi, 485-8520, Japan
| | - Eiryu Sai
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Shu-Ping Hui
- Faculty of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Sapporo, 060-0812, Japan
| | - Yusuke Nakano
- Department of Cardiology, Aichi Medical University, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Akinori Sawamura
- Department of Cardiovascular Medicine, Graduate School of Medicine, Nagoya University, 65 Tsurumai, Showa-ku, Nagoya, Aichi, 466-8560, Japan
| | - Tohru Inaba
- Department of Infection Control and Laboratory Medicine, Kyoto Prefectural University of Medicine, 465, Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Yasuhiko Sakata
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, 1-1, Seiryomachi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Yoko Yasui
- Faculty of Human Life Science, Osaka City University, 3-3-138, Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Yasuyuki Nagasawa
- Department of Internal Medicine, Division of Kidney and Dialysis, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan
| | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Hokkaido University Graduate School of Medicine, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Kazunori Shimada
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Sohsuke Yamada
- Department of Pathology and Laboratory Medicine, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Hiroyuki Hao
- Department of Pathology, Nihon University School of Medicine, 30-1 Ohyaguchikami-cho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Daisaku Nakatani
- Center for Global Health, Department of Medical Innovation, Osaka University Hospital.4F Center of Medical Innovation and Translational Research, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, 2-2 (A8) Yamadaoka Suita, Osaka, 565-0871, Japan
| | - Tomomi Ide
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Tetsuya Amano
- Department of Cardiology, Aichi Medical University, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Hiroaki Naito
- Department of Radiology, Nippon Life Hospital, 2-1-54, Enokojima, Nishi-ku, Osaka, 550-0006, Japan
| | - Hironori Nagasaka
- Department of Pediatrics, Takarazuka City Hospital, 4-5-1, Obama, Takarazuka, Hyogo, 665-0827, Japan
| | - Kunihisa Kobayashi
- Department of Endocrinology and Diabetes Mellitus, Fukuoka University Chikushi Hospital, 1-1-1, Zokumyoin, Chikushino, Fukuoka, 818-8502, Japan
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11
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Lonardo A, Lugari S, Ballestri S, Nascimbeni F, Baldelli E, Maurantonio M. A round trip from nonalcoholic fatty liver disease to diabetes: molecular targets to the rescue? Acta Diabetol 2019; 56:385-396. [PMID: 30519965 DOI: 10.1007/s00592-018-1266-0] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 11/27/2018] [Indexed: 02/07/2023]
Abstract
Evidence suggests a close relationship between nonalcoholic fatty liver disease (NAFLD) and type two diabetes (T2D). On the grounds of prevalence of disease, both conditions account for a significant financial cost for health care systems and individuals. Aim of this review article is to explore the epidemiological basis and the putative molecular mechanisms underlying the association of NAFLD with T2D. Epidemiological studies have shown that NAFLD is associated to the development of incident T2D and either reversal or improvement of NAFLD will result into decreased risk of developing incident T2D. On the other side of the coin data have shown that T2D will worsen the course of NAFLD doubling the risk of disease progression (i.e. evolution from simple steatosis to advanced fibrosis, cirrhosis, hepatocellular carcinoma, liver transplant and death). Conversely, NAFLD will contribute to metabolic decompensation of T2D. The pathogenesis of T2D in NAFLD patients may be mediated by several hepatokines impairing metabolic control. Among these, Fetuin-B, which causes glucose intolerance and is increased in patients with T2D and NAFLD with fibrosis is one of the most promising. T2D may affect the progression of NAFLD by acting at different levels of the pathogenic cascade involving gut microbiota and expanded, inflamed, dysfunctional adipose tissue. In conclusion, T2D and NAFLD are mutually, closely and bi-directionally associated. An improved understanding of molecular pathogenesis underlying this bi-directional association may allow us to be able to prevent the development of T2D by halting the progression of NAFLD.
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Affiliation(s)
- Amedeo Lonardo
- Azienda Ospedaliero-Universitaria Modena, UO di Medicina Metabolica, Ospedale Civile di Baggiovara, Via Giardini 1135, 41125, Modena, Italy.
| | - Simonetta Lugari
- Università di Modena e Reggio Emilia, via del Pozzo, 71, 41124, Modena, Italy
| | - Stefano Ballestri
- Azienda USL di Modena, Ospedale Di Pavullo, UO di Medicina, Pavullo (Mo), Italy
| | - Fabio Nascimbeni
- Azienda Ospedaliero-Universitaria Modena, UO di Medicina Metabolica, Ospedale Civile di Baggiovara, Via Giardini 1135, 41125, Modena, Italy
| | - Enrica Baldelli
- Università di Modena e Reggio Emilia, via del Pozzo, 71, 41124, Modena, Italy
| | - Mauro Maurantonio
- Azienda Ospedaliero-Universitaria Modena, UO di Medicina Metabolica, Ospedale Civile di Baggiovara, Via Giardini 1135, 41125, Modena, Italy
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12
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Lambadiari V, Dimitriadis G, Kadoglou NPE. The impact of oral anti-diabetic medications on heart failure: lessons learned from preclinical studies. Heart Fail Rev 2019. [PMID: 29524067 DOI: 10.1007/s10741-018-9690-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The prevalence of heart failure (HF) in the diabetic population has rapidly increased over the past 2 decades, triggering research about the impact of oral anti-diabetic medications on it. Unfortunately, not all success at the bench in preclinical experiments has translated to success at the bedside. On the other hand, recent promising clinical data from oral SGLT2 inhibitors mainly lack mechanistic explanation from experimental studies. Hence, it is critical to understand the lessons learned from prior translational studies to gain a better knowledge of the mechanisms of oral anti-diabetic drugs in HF. This review aims to summarize the results from preclinical studies regarding the interaction between oral anti-diabetic medications and heart failure development and/or exacerbation. Although there is a wide spectrum of controversial results, the underlying hope is that the clinical success rate will improve and the adverse events during ineffective targeted therapy will be limited.
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Affiliation(s)
- Vaia Lambadiari
- 2nd Department of Internal Medicine-Propaedeutic, Research Unit and Diabetes Center, Attikon University Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - George Dimitriadis
- 2nd Department of Internal Medicine-Propaedeutic, Research Unit and Diabetes Center, Attikon University Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikolaos P E Kadoglou
- Centre for Statistics in Medicine - Βotnar Research Centre, University of Oxford, Oxford, UK.
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13
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Riederer M, Lechleitner M, Köfeler H, Frank S. Reduced expression of adipose triglyceride lipase decreases arachidonic acid release and prostacyclin secretion in human aortic endothelial cells. Arch Physiol Biochem 2017; 123:249-253. [PMID: 28368219 PMCID: PMC5942144 DOI: 10.1080/13813455.2017.1309052] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
BACKGROUND Vascular endothelial cells represent an important source of arachidonic acid (AA)-derived mediators involved in the generation of anti- or proatherogenic environments. Evidence emerged (in mast cells), that in addition to phospholipases, neutral lipid hydrolases as adipose triglyceride lipase (ATGL) also participate in this process. OBJECTIVE To examine the impact of ATGL on AA-release from cellular phospholipids (PL) and on prostacyclin secretion in human aortic endothelial cells (HAEC). METHODS AND RESULTS siRNA-mediated silencing of ATGL promoted lipid droplet formation and TG accumulation in HAEC (nile red stain). ATGL knockdown decreased the basal and A23187 (calcium ionophore)-induced release of 14C-AA from (14C-AA-labeled) HAEC. In A23187-stimulated ATGL silenced cells, this was accompanied by a decreased content of 14C-AA in cellular PL and a decreased secretion of prostacyclin (determined by 6-keto PGF1α EIA). CONCLUSIONS In vascular endothelial cells, the efficiency of stimulus-induced AA release and prostacyclin secretion is dependent on ATGL.
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Affiliation(s)
- Monika Riederer
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Graz, Austria
- Institute of Biomedical Science, University of Applied Sciences, Graz, Austria
- CONTACT Monika Riederer
| | - Margarete Lechleitner
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Graz, Austria
| | - Harald Köfeler
- Center for Medical Research, Core Facility Mass Spectrometry, Medical University Graz, Graz, Austria
| | - Saša Frank
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Graz, Austria
- Saša FrankInstitute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz, Harrachgasse 21/III, 8010Graz, Austria
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14
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Extra-pancreatic invasion induces lipolytic and fibrotic changes in the adipose microenvironment, with released fatty acids enhancing the invasiveness of pancreatic cancer cells. Oncotarget 2017; 8:18280-18295. [PMID: 28407685 PMCID: PMC5392327 DOI: 10.18632/oncotarget.15430] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 01/10/2017] [Indexed: 12/18/2022] Open
Abstract
Pancreatic cancer progression involves components of the tumor microenvironment, including stellate cells, immune cells, endothelial cells, and the extracellular matrix. Although peripancreatic fat is the main stromal component involved in extra-pancreatic invasion, its roles in local invasion and metastasis of pancreatic cancer remain unclear. This study investigated the role of adipose tissue in pancreatic cancer progression using genetically engineered mice (Pdx1-Cre; LSL-KrasG12D; Trp53R172H/+) and an in vitro model of organotypic fat invasion. Mice fed a high fat diet had significantly larger primary pancreatic tumors and a significantly higher rate of distant organ metastasis than mice fed a standard diet. In the organotypic fat invasion model, pancreatic cancer cell clusters were smaller and more elongated in shape and showed increased fibrosis. Adipose tissue-derived conditioned medium enhanced pancreatic cancer cell invasiveness and gemcitabine resistance, as well as inducing morphologic changes in cancer cells and increasing the numbers of lipid droplets in their cytoplasm. The concentrations of oleic, palmitoleic, and linoleic acids were higher in adipose tissue-derived conditioned medium than in normal medium, with these fatty acids significantly enhancing the migration of cancer cells. Mature adipocytes were smaller and the concentration of fatty acids in the medium higher when these cells were co-cultured with cancer cells. These findings indicate that lipolytic and fibrotic changes in peripancreatic adipose tissue enhance local invasiveness and metastasis via adipocyte-released fatty acids. Inhibition of fatty acid uptake by cancer cells may be a novel therapy targeting interactions between cancer and stromal cells.
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15
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Kuo A, Lee MY, Sessa WC. Lipid Droplet Biogenesis and Function in the Endothelium. Circ Res 2017; 120:1289-1297. [PMID: 28119423 DOI: 10.1161/circresaha.116.310498] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 01/17/2017] [Accepted: 01/24/2017] [Indexed: 01/22/2023]
Abstract
RATIONALE Fatty acids (FA) are transported across the capillary endothelium to parenchymal tissues. However, it is not known how endothelial cells (EC) from large vessels process a postprandial surge of FA. OBJECTIVE This study was designed to characterize lipid droplet (LD) formation in EC by manipulating pathways leading to the formation and degradation of LD. In addition, several functions of LD-derived FA were assessed. METHODS AND RESULTS LD were present in EC lining the aorta after the peak in plasma triglycerides initiated by a gavage of olive oil in mice, in vivo. Similarly, in isolated aorta, oleic acid treatment generates LD in EC ex vivo. Cultured EC readily form LD largely via the enzyme DGAT (diacylglycerol O-acyltransferase 1) and degrade LD via ATGL (adipocyte triglyceride lipase) after FA loading. Functionally, LD-derived FA are dynamically regulated and function to protect EC from lipotoxic stress and provide FA for metabolic needs. CONCLUSIONS Our results delineate endothelial LD dynamics for the first time in vivo and in vitro. Moreover, LD formation protects EC from lipotoxic stress, regulates EC glycolysis, and provides a source of FA for adjacent cells in the vessel wall or tissues.
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Affiliation(s)
- Andrew Kuo
- From the Vascular Biology and Therapeutics Program (A.K., M.Y.L., W.C.S.), Department of Pharmacology (M.Y.L., W.C.S.), and Department of Cell Biology (A.K.), Yale University, School of Medicine, New Haven, CT
| | - Monica Y Lee
- From the Vascular Biology and Therapeutics Program (A.K., M.Y.L., W.C.S.), Department of Pharmacology (M.Y.L., W.C.S.), and Department of Cell Biology (A.K.), Yale University, School of Medicine, New Haven, CT
| | - William C Sessa
- From the Vascular Biology and Therapeutics Program (A.K., M.Y.L., W.C.S.), Department of Pharmacology (M.Y.L., W.C.S.), and Department of Cell Biology (A.K.), Yale University, School of Medicine, New Haven, CT.
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16
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Inoue T, Maeda Y, Sonoda N, Sasaki S, Kabemura T, Kobayashi K, Inoguchi T. Hyperinsulinemia and sulfonylurea use are independently associated with left ventricular diastolic dysfunction in patients with type 2 diabetes mellitus with suboptimal blood glucose control. BMJ Open Diabetes Res Care 2016; 4:e000223. [PMID: 27648285 PMCID: PMC5013397 DOI: 10.1136/bmjdrc-2016-000223] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Revised: 07/26/2016] [Accepted: 07/29/2016] [Indexed: 01/07/2023] Open
Abstract
OBJECTIVE Although diabetes mellitus is associated with an increased risk of heart failure with preserved ejection fraction, the underlying mechanisms leading to left ventricular diastolic dysfunction (LVDD) remain poorly understood. The study was designed to assess the risk factors for LVDD in patients with type 2 diabetes mellitus. RESEARCH DESIGN AND METHODS The study cohort included 101 asymptomatic patients with type 2 diabetes mellitus without overt heart disease. Left ventricular diastolic function was estimated as the ratio of early diastolic velocity (E) from transmitral inflow to early diastolic velocity (e') of tissue Doppler at mitral annulus (E/e'). Parameters of glycemic control, plasma insulin concentration, treatment with antidiabetic drugs, lipid profile, and other clinical characteristics were evaluated, and their association with E/e' determined. Patients with New York Heart Association class >1, ejection fraction <50%, history of coronary artery disease, severe valvulopathy, chronic atrial fibrillation, or creatinine clearance <30 mL/min, as well as those receiving insulin treatment, were excluded. RESULTS Univariate analysis showed that E/e' was significantly correlated with age (p<0.001), sex (p<0.001), duration of diabetes (p=0.002), systolic blood pressure (p=0.017), pulse pressure (p=0.010), fasting insulin concentration (p=0.025), and sulfonylurea use (p<0.001). Multivariate linear regression analysis showed that log E/e' was significantly and positively correlated with log age (p=0.034), female sex (p=0.019), log fasting insulin concentration (p=0.010), and sulfonylurea use (p=0.027). CONCLUSIONS Hyperinsulinemia and sulfonylurea use may be important in the development of LVDD in patients with type 2 diabetes mellitus.
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Affiliation(s)
- Tomoaki Inoue
- Endocrinology and Metabolism Division, Fukuoka City Medical Association Hospital, Fukuoka, Japan
| | - Yasutaka Maeda
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Innovation Center for Medical Redox Navigation, Kyushu University, Fukuoka, Japan
| | - Noriyuki Sonoda
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shuji Sasaki
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Teppei Kabemura
- Gastroenterology Division, Fukuoka City Medical Association Hospital, Fukuoka, Japan
| | - Kunihisa Kobayashi
- Department of Endocrinology and Diabetes Mellitus, Fukuoka University Chikushi Hospital, Fukuoka, Japan
| | - Toyoshi Inoguchi
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Innovation Center for Medical Redox Navigation, Kyushu University, Fukuoka, Japan
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17
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Ikeda Y, Zaima N, Hirano KI, Mano M, Kobayashi K, Yamada S, Yamaguchi S, Suzuki A, Kanzaki H, Hamasaki T, Kotani JI, Kato S, Nagasaka H, Setou M, Ishibashi-Ueda H. Coronary triglyceride deposition in contemporary advanced diabetics. Pathol Int 2015; 64:325-35. [PMID: 25047503 DOI: 10.1111/pin.12177] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Accepted: 05/22/2014] [Indexed: 01/20/2023]
Abstract
It is of importance to clarify pathophysiology of diabetic heart diseases such as heart failure and coronary artery disease. We reported a novel clinical phenotype called triglyceride deposit cardiomyovasculopathy (TGCV), showing aberrant TG accumulation in both coronary arteries and myocardium, in a cardiac transplant recipient. Here, we examined autopsied diabetics for TG deposition in cardiovasculature. Consecutive series of hearts from advanced diabetes mellitus (DM) subjects (DM group: DMG, n = 20) and those from age- and sex-matched non-diabetic controls (non DM group: NDMG, n = 20) were examined. The diagnostic criteria of 'advanced DM' was made based on 2014 Clinical Practice Recommendations proposed by the American Diabetes Association. The mean duration of DM was 15.8 years. All DMG suffered from heart diseases including coronary artery diseases and 14 subjects had multi-vessel disease. Tissue TG contents were measured biochemically. Coronary arterial TG contents was significantly higher in DMG compared with NDMG. Spatial distribution of TG in transverse sections of coronary arteries showed TG deposition mainly in smooth muscle cells by Imaging Mass Spectrometry. Abundant TG deposition in coronary artery might be associated with advanced DM.
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Affiliation(s)
- Yoshihiko Ikeda
- Department of Pathology, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
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18
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Zhao Y, Vanhoutte PM, Leung SWS. α1 -Adrenoceptor activation of PKC-ε causes heterologous desensitization of thromboxane receptors in the aorta of spontaneously hypertensive rats. Br J Pharmacol 2015; 172:3687-701. [PMID: 25857252 DOI: 10.1111/bph.13157] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 03/19/2015] [Accepted: 03/31/2015] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND AND PURPOSE In the aorta of adult spontaneously hypertensive (SHR), but not in that of normotensive Wistar-Kyoto (WKY), rats, previous exposure to phenylephrine inhibits subsequent contractions to PGE2 . The present experiments were designed to examine the mechanism(s) underlying this inhibition. EXPERIMENTAL APPROACH Isometric tension was measured in isolated rings of SHR and WKY aortae. Gene expression and protein presence were measured by quantitative real-time PCR and Western blotting respectively. KEY RESULTS In aorta of 18 weeks SHR, but not age-matched WKY, pre-exposure to phenylephrine inhibited subsequent contractions to PGE2 that were mediated by thromboxane prostanoid (TP) receptors. This inhibition was not observed in preparations of pre-hypertensive 5-week-old SHR, and was significantly larger in those of 36- than 18-week-old SHR. Pre-exposure to the PKC activator, phorbol 12,13-dibutyrate, also inhibited subsequent contractions to PGE2 in SHR aortae. The selective inhibitor of PKC-ε, ε-V1-2, abolished the desensitization caused by pre-exposure to phenylephrine. Two molecular PKC bands were detected and their relative intensities differed in 36-week-old WKY and SHR vascular smooth muscle. The mRNA expressions of PKC-α, PKC-ε, PK-N2 and PKC-ζ and of G protein-coupled kinase (GRK)-2, GRK4 and β-arrestin2 were higher in SHR than WKY aortae. CONCLUSIONS AND IMPLICATIONS These experiments suggest that in the SHR but not the WKY aorta, α1 -adrenoceptor activation desensitizes TP receptors through activation of PKC-ε. This heterologous desensitization is a consequence of the chronic exposure to high arterial pressure.
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Affiliation(s)
- Yingzi Zhao
- Department of Pharmacology & Pharmacy and Stake Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China
| | - Paul M Vanhoutte
- Department of Pharmacology & Pharmacy and Stake Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China
| | - Susan W S Leung
- Department of Pharmacology & Pharmacy and Stake Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China
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19
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Inoue T, Inoguchi T, Sonoda N, Hendarto H, Makimura H, Sasaki S, Yokomizo H, Fujimura Y, Miura D, Takayanagi R. GLP-1 analog liraglutide protects against cardiac steatosis, oxidative stress and apoptosis in streptozotocin-induced diabetic rats. Atherosclerosis 2015; 240:250-9. [PMID: 25818251 DOI: 10.1016/j.atherosclerosis.2015.03.026] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 03/16/2015] [Accepted: 03/17/2015] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Accumulating evidence has implicated that GLP-1 may have a beneficial effect on cardiovascular but the mechanism is not fully understood. Here we show that GLP-1 analog, liraglutide, inhibits cardiac steatosis, oxidative stress and apoptosis in streptozotocin (STZ)-induced type 1 diabetic rats, via activation of AMPK-Sirt1 pathway. METHODS Diabetic rats were treated with subcutaneous injections of liraglutide (0.3 mg/kg/12 h) for 4 weeks. Myocardial steatosis (detected by oil red O staining and myocardial triglyceride and diacylglycerol (DAG) contents assay), expression of protein kinase C (PKC), heart NAD(P)H oxidase activity, oxidative stress markers (8-hydroxy-2'-deoxyguanosine staining), apoptosis (TUNEL analysis) and genes that affect apoptosis and lipid metabolism were evaluated. RESULTS Administration of liraglutide did not affect plasma glucose and insulin levels or body weights in STZ-induced diabetic rats, but normalized myocardial steatosis, expression of PKC, NAD(P)H oxidase activity, oxidative stress markers and apoptosis, all of which were significantly increased in diabetic hearts. Additionally, expression of genes mediating lipid uptake, synthesis and oxidation were increased in the diabetic hearts, and these increases were all reduced by liraglutide. In addition, liraglutide increased expression of Sirt1 and phosphorylated AMPK in the diabetic hearts. CONCLUSIONS Liraglutide may have a beneficial effect on cardiac steatosis, DAG-PKC-NAD(P)H pathway, oxidative stress and apoptosis via activation of AMPK-Sirt1 pathway, independently of a glucose-lowering effect.
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Affiliation(s)
- Tomoaki Inoue
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Toyoshi Inoguchi
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Innovation Center for Medical Redox Navigation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Noriyuki Sonoda
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Innovation Center for Medical Redox Navigation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hari Hendarto
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hiroaki Makimura
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Shuji Sasaki
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hisashi Yokomizo
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yoshinori Fujimura
- Innovation Center for Medical Redox Navigation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Daisuke Miura
- Innovation Center for Medical Redox Navigation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ryoichi Takayanagi
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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20
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Fatty acid signaling: the new function of intracellular lipases. Int J Mol Sci 2015; 16:3831-55. [PMID: 25674855 PMCID: PMC4346929 DOI: 10.3390/ijms16023831] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Revised: 11/19/2014] [Accepted: 01/21/2015] [Indexed: 12/21/2022] Open
Abstract
Until recently, intracellular triacylglycerols (TAG) stored in the form of cytoplasmic lipid droplets have been considered to be only passive “energy conserves”. Nevertheless, degradation of TAG gives rise to a pleiotropic spectrum of bioactive intermediates, which may function as potent co-factors of transcription factors or enzymes and contribute to the regulation of numerous cellular processes. From this point of view, the process of lipolysis not only provides energy-rich equivalents but also acquires a new regulatory function. In this review, we will concentrate on the role that fatty acids liberated from intracellular TAG stores play as signaling molecules. The first part provides an overview of the transcription factors, which are regulated by fatty acids derived from intracellular stores. The second part is devoted to the role of fatty acid signaling in different organs/tissues. The specific contribution of free fatty acids released by particular lipases, hormone-sensitive lipase, adipose triacylglycerol lipase and lysosomal lipase will also be discussed.
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21
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Lin CY, Zu CH, Yang CC, Tsai PJ, Shyu JF, Chen CP, Weng ZC, Chen TH, Wang HS. IL-1β-Induced Mesenchymal Stem Cell Migration Involves MLCK Activation via PKC Signaling. Cell Transplant 2014; 24:2011-28. [PMID: 25333338 DOI: 10.3727/096368914x685258] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Mesenchymal stem cells (MSCs) migrate via the bloodstream to sites of injury, possibly attracted by inflammatory cytokines. Although many cytokines can induce stem cell migration, the underlying mechanism is not fully understood. We found that tail vein-injected MSCs migrate to the pancreas in nonobese diabetic (NOD) mice. An ELISA assay revealed that hyperglycemic NOD mice have higher pancreatic levels of interleukin-1β (IL-1β) than normal NOD mice and that IL-1β stimulates MSC migration in a Transwell assay and electric cell-substrate impedance sensing system. Microarray analysis showed that myosin light chain kinase (MLCK) is involved in IL-1β-induced MSC migration, while Western blots showed that IL-1β stimulates MLCK expression and activation and that MLCK-siRNA transfection reduces MSC migration. Kinase inhibitors, chromatin immunoprecipitation, and a knockdown study revealed that IL-1β-induced MLCK expression is regulated by the PKCδ/NF-κB signaling pathway, and a kinase inhibitor study revealed that IL-1β-induced MLCK activation occurs via the PKCα/MEK/ERK signaling pathway. These results show that IL-1β released from the pancreas of hyperglycemic NOD mice induces MSC migration and that this is dependent on MLCK expression via the PKCδ/NF-κB pathway and on MLCK activation via the PKCα/MEK/ERK signaling cascade. This study increases our understanding of the mechanisms by which MSCs home to injury sites.
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Affiliation(s)
- Cheng-Yu Lin
- Institute of Anatomy and Cell Biology, School of Medicine, National Yang Ming University, Taipei, Taiwan
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22
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Baldanzi G. Inhibition of diacylglycerol kinases as a physiological way to promote diacylglycerol signaling. Adv Biol Regul 2014; 55:39-49. [PMID: 24582387 DOI: 10.1016/j.jbior.2014.02.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 01/02/2014] [Accepted: 02/02/2014] [Indexed: 01/12/2023]
Abstract
Diacylglycerol is a key regulator of cell physiology, controlling the membrane recruitment and activation of signaling molecules. Accordingly, diacylglycerol generation and metabolism are strictly controlled, allowing for localized regulation of its concentration. While the increased production of diacylglycerol upon receptor triggering is well recognized, the modulation of diacylglycerol metabolism by diacylglycerol kinases (DGKs) is less characterized. Some agonists induce DGK activation and recruitment to the plasma membrane, promoting diacylglycerol metabolism to phosphatidic acid. Conversely, several reports indicate that signaling pathways that selectively inhibits DGK isoforms can enhance cellular diacylglycerol levels and signal transduction. For example, the impairment of DGKθ activity by RhoA binding to the catalytic domain represents a conserved mechanism controlling diacylglycerol signaling from Caenorhabditis elegans motoneurons to mammalian hepatocytes. Similarly, DGKα activity is inhibited in lymphocytes by TCR signaling, thus contributing to a rise in diacylglycerol concentration for downstream signaling. Finally, DGKμ activity is inhibited by ischemia-reperfusion-generated reactive oxygen species in airway endothelial cells, promoting diacylglycerol-mediated ion channel opening and edema. In those systems, DGKs provide a gatekeeper function by blunting diacylglycerol levels or possibly establishing permissive domains for diacylglycerol signaling. In this review, I discuss the possible general relevance of DGK inhibition to enhanced diacylglycerol signaling.
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Affiliation(s)
- Gianluca Baldanzi
- University "A. Avogadro" del Piemonte Orientale, Department of Translational Medicine, via Solaroli 17, 28100 Novara, Italy.
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23
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Metformin and liraglutide ameliorate high glucose-induced oxidative stress via inhibition of PKC-NAD(P)H oxidase pathway in human aortic endothelial cells. Atherosclerosis 2014; 232:156-64. [DOI: 10.1016/j.atherosclerosis.2013.10.025] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 10/17/2013] [Accepted: 10/18/2013] [Indexed: 11/23/2022]
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24
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Mruk DD, Xiao X, Lydka M, Li MWM, Bilinska B, Cheng CY. Intercellular adhesion molecule 1: recent findings and new concepts involved in mammalian spermatogenesis. Semin Cell Dev Biol 2013; 29:43-54. [PMID: 23942142 DOI: 10.1016/j.semcdb.2013.07.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 07/26/2013] [Accepted: 07/29/2013] [Indexed: 01/05/2023]
Abstract
Spermatogenesis, the process of spermatozoa production, is regulated by several endocrine factors, including testosterone, follicle stimulating hormone, luteinizing hormone and estradiol 17β. For spermatogenesis to reach completion, developing germ cells must traverse the seminiferous epithelium while remaining transiently attached to Sertoli cells. If germ cell adhesion were to be compromised for a period of time longer than usual, germ cells would slough from the seminiferous epithelium and infertility would result. Presently, Sertoli-germ cell adhesion is known to be mediated largely by classical and desmosomal cadherins. More recent studies, however, have begun to expand long-standing concepts and to examine the roles of other proteins such as intercellular adhesion molecules. In this review, we focus on the biology of intercellular adhesion molecules in the mammalian testis, hoping that this information is useful in the design of future studies.
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Affiliation(s)
- Dolores D Mruk
- Center for Biomedical Research, Population Council, 1230 York Avenue, New York, NY 10065, United States.
| | - Xiang Xiao
- Center for Biomedical Research, Population Council, 1230 York Avenue, New York, NY 10065, United States
| | - Marta Lydka
- Center for Biomedical Research, Population Council, 1230 York Avenue, New York, NY 10065, United States
| | - Michelle W M Li
- Center for Biomedical Research, Population Council, 1230 York Avenue, New York, NY 10065, United States
| | - Barbara Bilinska
- Institute of Zoology, Department of Endocrinology, The Jagiellonian University, Gronostajowa 9, 30-387 Krakow, Poland
| | - C Yan Cheng
- Center for Biomedical Research, Population Council, 1230 York Avenue, New York, NY 10065, United States
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25
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Inoue T, Kobayashi K, Inoguchi T, Sonoda N, Maeda Y, Hirata E, Fujimura Y, Miura D, Hirano KI, Takayanagi R. Downregulation of adipose triglyceride lipase in the heart aggravates diabetic cardiomyopathy in db/db mice. Biochem Biophys Res Commun 2013; 438:224-9. [DOI: 10.1016/j.bbrc.2013.07.063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 07/16/2013] [Indexed: 10/26/2022]
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26
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Lin Y, Chiba S, Suzuki A, Yamaguchi S, Nakanishi T, Matsumoto H, Ikeda Y, Ishibashi-Ueda H, Hirano KI, Kato S. Vascular smooth muscle cells isolated from adipose triglyceride lipase-deficient mice exhibit distinct phenotype and phenotypic plasticity. Biochem Biophys Res Commun 2013; 434:534-40. [PMID: 23583398 DOI: 10.1016/j.bbrc.2013.03.109] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 03/19/2013] [Indexed: 10/27/2022]
Abstract
The alteration of triglyceride (TG) metabolism in vascular smooth muscle cells (SMC) is likely to be correlated with certain phenotype, though this has not been elucidated. Adipose triglyceride lipase (ATGL) exerts major TG catalytic activity in both adipotic and non-adipotic cells. In the present study, we isolated SMC from ATGL-deficient mice (ATGL(-/-)mSMC). ATGL(-/-)mSMC showed spontaneous TG accumulation with lower mitogenic response and smooth muscle actin (SMA) expression compared to ATGL (+/+)mSMC. Percentage of senescence-associated β-galactosidase positive cells was also increased in ATGL(-/-)mSMC. Real-time PCR followed by screening with focused DNA array analysis revealed up-regulated expression of glucokinase (1.7-fold), lipoprotein lipase (3.8-fold) and interleukin-6 (3.7-fold) and down-regulated expression of vascular endothelial growth factor-A (0.2-fold), type I collagen (0.5-fold), and transforming growth factor-β (0.4-fold) in ATGL(-/-)mSMC compared to ATGL(+/+)mSMC. Next, ectopic gene transfer of human ATGL was attempted using doxycycline (Dox)-regulatable myc-DDK-tagged adenovirus vector (AdvATGL). AdvATGL infection resulted in a reduction of TG accumulation with elevated mitogenic response and SMA expression, and decreased in senescent cell numbers in ATGL(-/-)mSMC. Moreover, deviated gene expression pattern in ATGL(-/-)mSMC was potentially corrected. Our data suggest that ATGL(-/-)mSMC have a distinct phenotype that may be related to vascular pathogenesis. Plasticity of SMC phenotypes correlated to lipid metabolism could be a therapeutic target.
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Affiliation(s)
- Yanhui Lin
- Department of Pathology and Cell Biology, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Nishihara, Okinawa 903-0215, Japan
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27
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Li TM, Wu CM, Huang HC, Chou PC, Fong YC, Tang CH. Interleukin-11 increases cell motility and up-regulates intercellular adhesion molecule-1 expression in human chondrosarcoma cells. J Cell Biochem 2013; 113:3353-62. [PMID: 22644863 DOI: 10.1002/jcb.24211] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Interleukin-11 (IL-11) was originally identified as the cytokine that could induce the proliferation of human cells. Recent studies have shown that IL-11 plays a critical role in tumor growth, angiogenesis, and metastasis. Chondrosarcoma is a type of highly malignant tumor with a potent capacity to invade locally and cause distant metastasis. However, the effects of IL-11 on human chondrosarcoma cells are largely unknown. Here, we found that IL-11 increased the migration and expression of intercellular adhesion molecule-1 (ICAM)-1 in human chondrosarcoma cells. We also found that human chondrosarcoma tissues had significant expression of the IL-11 which was higher than that in primary chondrocytes. The phosphatidylinositol 3-kinase (PI3K), Akt, and NF-κB pathways were activated by IL-11 treatment, and the IL-11-induced expression of ICAM-1 and migration activity were inhibited by the specific inhibitors and mutant forms of PI3K, Akt, and NF-κB cascades. Taken together, our results indicate that IL-11 enhanced the migration of the chondrosarcoma cells by increasing ICAM-1 expression through the IL-11Rα receptor, PI3K, Akt, and NF-κB signal transduction pathway.
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Affiliation(s)
- Te-Mao Li
- School of Chinese Medicine, China Medical University, Taichung, Taiwan
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28
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Abstract
Vascular endothelial dysfunction is determined by both genetic and environmental factors that cause decreased bioavailability of the vasodilator nitric oxide. This is a hallmark of atherosclerosis, hypertension, and coronary heart disease, which are major complications of metabolic disorders, including diabetes and obesity. Several therapeutic interventions, including changes in lifestyle as well as pharmacologic treatments, are useful for improving endothelial dysfunction in the face of lipotoxicity. This review discusses the current understanding of molecular and physiologic mechanisms underlying lipotoxicity-mediated endothelial dysfunction as well as relevant therapeutic approaches to ameliorate dyslipidemia and consequent endothelial dysfunction that have the potential to improve cardiovascular and metabolic outcomes.
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Affiliation(s)
- Jeong-a Kim
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, UAB Comprehensive Diabetes Center, University of Alabama at Birmingham, 1808 7th Avenue South, BDB 777, Birmingham, AL 35294-0012, USA
- Department of Cell Biology, University of Alabama at Birmingham, 1808 7th Avenue South, BDB 777, Birmingham, AL 35294, USA
| | - Monica Montagnani
- Department of Biomedical Sciences and Human Oncology, Pharmacology Section, University “Aldo Moro” at Bari, Policlinico, Piazza G. Cesare, 11, 70124 Bari, Italy
| | - Sruti Chandrasekran
- Department of Medicine, Division of Endocrinology, Diabetes & Nutrition, University of Maryland at Baltimore, 660 West Redwood Street, HH 495, Baltimore, MD 21201, USA
| | - Michael J. Quon
- Department of Medicine, Division of Endocrinology, Diabetes & Nutrition, University of Maryland at Baltimore, 660 West Redwood Street, HH 495, Baltimore, MD 21201, USA
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29
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Xiao X, Cheng CY, Mruk DD. Intercellular adhesion molecule-1 is a regulator of blood-testis barrier function. J Cell Sci 2012; 125:5677-89. [PMID: 22976294 DOI: 10.1242/jcs.107987] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The mechanism underlying the movement of preleptotene/leptotene spermatocytes across the blood-testis barrier (BTB) during spermatogenesis is not well understood largely owing to the fact that the BTB, unlike most other blood-tissue barriers, is composed of several co-existing and co-functioning junction types. In the present study, we show that intercellular adhesion molecule-1 [ICAM-1, a Sertoli and germ cell adhesion protein having five immunoglobulin (Ig)-like domains, in addition to transmembrane and cytoplasmic domains] is a regulator of BTB integrity. Initial experiments showed ICAM-1 to co-immunoprecipitate and co-localize with tight junction and basal ectoplasmic specialization proteins such as occludin and N-cadherin, which contribute to BTB function. More importantly, overexpression of ICAM-1 in Sertoli cells in vitro enhanced barrier function when monitored by transepithelial electrical resistance measurements, illustrating that ICAM-1-mediated adhesion can promote BTB integrity. On the other hand, overexpression of a truncated form of ICAM-1 that consisted only of the five Ig-like domains (sICAM-1; this form of ICAM-1 is known to be secreted) elicited an opposite effect when Sertoli cell barrier function was found to be perturbed in vitro; in this case, sICAM-1 overexpression resulted in the downregulation of several BTB constituent proteins, which was probably mediated by Pyk2/p-Pyk2-Y402 and c-Src/p-Src-Y530. These findings were expanded to the in vivo level when BTB function was found to be disrupted following sICAM-1 overexpression. These data illustrate the existence of a unique mechanism in the mammalian testis where ICAM-1 can either positively or negatively regulate BTB function.
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Affiliation(s)
- Xiang Xiao
- Center for Biomedical Research, Population Council, 1230 York Avenue, New York, NY 10065, USA
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