1
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Svagusa T, Sikiric S, Milavic M, Sepac A, Seiwerth S, Milicic D, Gasparovic H, Biocina B, Rudez I, Sutlic Z, Manola S, Varvodic J, Udovicic M, Urlic M, Ivankovic S, Plestina S, Paic F, Kulic A, Bakovic P, Sedlic F. Heart failure in patients is associated with downregulation of mitochondrial quality control genes. Eur J Clin Invest 2023; 53:e14054. [PMID: 37403271 DOI: 10.1111/eci.14054] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 05/27/2023] [Accepted: 06/15/2023] [Indexed: 07/06/2023]
Abstract
BACKGROUND Mitochondrial dysfunction is one of key factors causing heart failure. We performed a comprehensive analysis of expression of mitochondrial quality control (MQC) genes in heart failure. METHODS Myocardial samples were obtained from patients with ischemic and dilated cardiomyopathy in a terminal stage of heart failure and donors without heart disease. Using quantitative real-time PCR, we analysed a total of 45 MQC genes belonging to mitochondrial biogenesis, fusion-fission balance, mitochondrial unfolded protein response (UPRmt), translocase of the inner membrane (TIM) and mitophagy. Protein expression was analysed by ELISA and immunohistochemistry. RESULTS The following genes were downregulated in ischemic and dilated cardiomyopathy: COX1, NRF1, TFAM, SIRT1, MTOR, MFF, DNM1L, DDIT3, UBL5, HSPA9, HSPE1, YME1L, LONP1, SPG7, HTRA2, OMA1, TIMM23, TIMM17A, TIMM17B, TIMM44, PAM16, TIMM22, TIMM9, TIMM10, PINK1, PARK2, ROTH1, PARL, FUNDC1, BNIP3, BNIP3L, TPCN2, LAMP2, MAP1LC3A and BECN1. Moreover, MT-ATP8, MFN2, EIF2AK4 and ULK1 were downregulated in heart failure from dilated, but not ischemic cardiomyopathy. VDAC1 and JUN were only genes that exhibited significantly different expression between ischemic and dilated cardiomyopathy. Expression of PPARGC1, OPA1, JUN, CEBPB, EIF2A, HSPD1, TIMM50 and TPCN1 was not significantly different between control and any form of heart failure. TOMM20 and COX proteins were downregulated in ICM and DCM. CONCLUSIONS Heart failure in patients with ischemic and dilated cardiomyopathy is associated with downregulation of large number of UPRmt, mitophagy, TIM and fusion-fission balance genes. This indicates multiple defects in MQC and represents one of potential mechanisms underlying mitochondrial dysfunction in patients with heart failure.
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Affiliation(s)
- T Svagusa
- Department of Cardiovascular Diseases, Dubrava Clinical Hospital, Zagreb, Croatia
| | - S Sikiric
- Department of Pathology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - M Milavic
- Department of Pathology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - A Sepac
- Department of Pathology, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Pathology and Cytology, University Hospital Center Zagreb, Zagreb, Croatia
| | - S Seiwerth
- Department of Pathology, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Pathology and Cytology, University Hospital Center Zagreb, Zagreb, Croatia
| | - D Milicic
- Department of Internal Medicine, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Cardiovascular Diseases, University Hospital Center Zagreb, Zagreb, Croatia
| | - H Gasparovic
- Department of Surgery, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Cardiac Surgery, University Hospital Center Zagreb, Zagreb, Croatia
| | - B Biocina
- Department of Surgery, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Cardiac Surgery, University Hospital Center Zagreb, Zagreb, Croatia
| | - I Rudez
- Department of Surgery, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Cardiac and Transplant Surgery, Dubrava Clinical Hospital, Zagreb, Croatia
| | - Z Sutlic
- Department of Surgery, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Cardiac and Transplant Surgery, Dubrava Clinical Hospital, Zagreb, Croatia
| | - S Manola
- Department of Cardiovascular Diseases, Dubrava Clinical Hospital, Zagreb, Croatia
| | - J Varvodic
- Department of Cardiac and Transplant Surgery, Dubrava Clinical Hospital, Zagreb, Croatia
| | - M Udovicic
- Department of Cardiovascular Diseases, Dubrava Clinical Hospital, Zagreb, Croatia
- Department of Internal Medicine, University of Zagreb School of Medicine, Zagreb, Croatia
| | - M Urlic
- Department of Cardiac Surgery, University Hospital Center Zagreb, Zagreb, Croatia
| | - S Ivankovic
- Department of Cardiac Surgery, University Hospital Center Split, Split, Croatia
| | - S Plestina
- Department of Pathophysiology, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Oncology, University Hospital Centre Zagreb, Zagreb, Croatia
| | - F Paic
- Department of Medical Biology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - A Kulic
- Department of Oncology, University Hospital Centre Zagreb, Zagreb, Croatia
| | - P Bakovic
- Department of Pathophysiology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - F Sedlic
- Department of Pathophysiology, University of Zagreb School of Medicine, Zagreb, Croatia
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2
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Krishnan AR, Schwartz ML, Somerville C, Ding Q, Kim RH. Using whole genome sequence findings to assess gene-disease causality in cardiomyopathy and arrhythmia patients. Future Cardiol 2023; 19:583-592. [PMID: 37830358 DOI: 10.2217/fca-2023-0082] [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] [Indexed: 10/14/2023] Open
Abstract
Aim: The genetic etiologies of cardiomyopathies and arrhythmias have not been fully elucidated. Materials & methods: Research findings from genome analyses in a cardiomyopathy and arrhythmia cohort were gathered. Gene-disease relationships from two databases were compared with patient phenotypes. A literature review was conducted for genes with limited evidence. Results: Of 43 genes with candidate findings from 18 cases, 23.3% of genes had never been curated, 15.0% were curated for cardiomyopathies, 16.7% for arrhythmias and 31.3% for other conditions. 25.5% of candidate findings were curated for the patient's specific phenotype with 11.8% having definitive evidence. MYH6 and TPCN1 were flagged for recuration. Conclusion: Findings from genome sequencing in disease cohorts may be useful to guide gene-curation efforts.
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Affiliation(s)
- Aishwarya Rajesh Krishnan
- Division of Clinical & Metabolic Genetics, The Hospital for Sick Children, Toronto, Ontario, M5G 1X8, Canada
| | - Marci Lb Schwartz
- Division of Clinical & Metabolic Genetics, The Hospital for Sick Children, Toronto, Ontario, M5G 1X8, Canada
- Ted Rogers Centre for Heart Research, Cardiac Genome Clinic, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, M5G 1X8, Canada
| | - Cherith Somerville
- Division of Clinical & Metabolic Genetics, The Hospital for Sick Children, Toronto, Ontario, M5G 1X8, Canada
- Ted Rogers Centre for Heart Research, Cardiac Genome Clinic, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, M5G 1X8, Canada
| | - Qiliang Ding
- Division of Clinical & Metabolic Genetics, The Hospital for Sick Children, Toronto, Ontario, M5G 1X8, Canada
- Ted Rogers Centre for Heart Research, Cardiac Genome Clinic, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, M5G 1X8, Canada
| | - Raymond H Kim
- Division of Clinical & Metabolic Genetics, The Hospital for Sick Children, Toronto, Ontario, M5G 1X8, Canada
- Ted Rogers Centre for Heart Research, Cardiac Genome Clinic, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, M5G 1X8, Canada
- Fred A. Litwin Family Centre in Genetic Medicine, University Health Network, Sinai Health System, Department of Medicine, Toronto, Ontario, M5T 3L9, Canada
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3
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Martucci LL, Cancela JM. Neurophysiological functions and pharmacological tools of acidic and non-acidic Ca2+ stores. Cell Calcium 2022; 104:102582. [DOI: 10.1016/j.ceca.2022.102582] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/07/2022] [Accepted: 03/23/2022] [Indexed: 02/08/2023]
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4
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Skelding KA, Barry DL, Theron DZ, Lincz LF. Targeting the two-pore channel 2 in cancer progression and metastasis. EXPLORATION OF TARGETED ANTI-TUMOR THERAPY 2022; 3:62-89. [PMID: 36046356 PMCID: PMC9400767 DOI: 10.37349/etat.2022.00072] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 02/02/2022] [Indexed: 11/19/2022] Open
Abstract
The importance of Ca2+ signaling, and particularly Ca2+ channels, in key events of cancer cell function such as proliferation, metastasis, autophagy and angiogenesis, has recently begun to be appreciated. Of particular note are two-pore channels (TPCs), a group of recently identified Ca2+-channels, located within the endolysosomal system. TPC2 has recently emerged as an intracellular ion channel of significant pathophysiological relevance, specifically in cancer, and interest in its role as an anti-cancer drug target has begun to be explored. Herein, an overview of the cancer-related functions of TPC2 and a discussion of its potential as a target for therapeutic intervention, including a summary of clinical trials examining the TPC2 inhibitors, naringenin, tetrandrine, and verapamil for the treatment of various cancers is provided.
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Affiliation(s)
- Kathryn A. Skelding
- Cancer Cell Biology Research Group, School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, The University of Newcastle, Callaghan, New South Wales 2308, Australia;Hunter Medical Research Institute, New Lambton Heights, New South Wales 2305, Australia
| | - Daniel L. Barry
- Cancer Cell Biology Research Group, School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, The University of Newcastle, Callaghan, New South Wales 2308, Australia;Hunter Medical Research Institute, New Lambton Heights, New South Wales 2305, Australia
| | - Danielle Z. Theron
- Cancer Cell Biology Research Group, School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, The University of Newcastle, Callaghan, New South Wales 2308, Australia;Hunter Medical Research Institute, New Lambton Heights, New South Wales 2305, Australia
| | - Lisa F. Lincz
- Cancer Cell Biology Research Group, School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, The University of Newcastle, Callaghan, New South Wales 2308, Australia;Hunter Medical Research Institute, New Lambton Heights, New South Wales 2305, Australia;Hunter Hematology Research Group, Calvary Mater Newcastle Hospital, Waratah, New South Wales 2298, Australia
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5
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Lorenzo-Almorós A, Cepeda-Rodrigo J, Lorenzo Ó. Diabetic cardiomyopathy. Rev Clin Esp 2022; 222:100-111. [DOI: 10.1016/j.rceng.2019.10.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 10/21/2019] [Indexed: 12/24/2022]
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6
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Khan D, Ara T, Ravi V, Rajagopal R, Tandon H, Parvathy J, Gonzalez EA, Asirvatham-Jeyaraj N, Krishna S, Mishra S, Raghu S, Bhati AS, Tamta AK, Dasgupta S, Kolthur-Seetharam U, Etchegaray JP, Mostoslavsky R, Rao PSM, Srinivasan N, Sundaresan NR. SIRT6 transcriptionally regulates fatty acid transport by suppressing PPARγ. Cell Rep 2021; 35:109190. [PMID: 34077730 PMCID: PMC8190874 DOI: 10.1016/j.celrep.2021.109190] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 03/08/2021] [Accepted: 05/07/2021] [Indexed: 12/27/2022] Open
Abstract
Pathological lipid accumulation is often associated with enhanced uptake of free fatty acids via specific transporters in cardiomyocytes. Here, we identify SIRT6 as a critical transcriptional regulator of fatty acid transporters in cardiomyocytes. We find that SIRT6 deficiency enhances the expression of fatty acid transporters, leading to enhanced fatty acid uptake and lipid accumulation. Interestingly, the haploinsufficiency of SIRT6 is sufficient to induce the expression of fatty acid transporters and cause lipid accumulation in murine hearts. Mechanistically, SIRT6 depletion enhances the occupancy of the transcription factor PPARγ on the promoters of critical fatty acid transporters without modulating the acetylation of histone 3 at Lys 9 and Lys 56. Notably, the binding of SIRT6 to the DNA-binding domain of PPARγ is critical for regulating the expression of fatty acid transporters in cardiomyocytes. Our data suggest exploiting SIRT6 as a potential therapeutic target for protecting the heart from metabolic diseases.
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Affiliation(s)
- Danish Khan
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Tarannum Ara
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Venkatraman Ravi
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Raksha Rajagopal
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Himani Tandon
- Molecular Biophysics Unit, Indian Institute of Science, Bengaluru, India
| | - Jayadevan Parvathy
- Molecular Biophysics Unit, Indian Institute of Science, Bengaluru, India; IISc-Mathematics Initiative, Indian Institute of Science, Bengaluru, India
| | - Edward A Gonzalez
- Department of Biological Sciences, Rutgers University, Newark, NJ, USA
| | - Ninitha Asirvatham-Jeyaraj
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Swati Krishna
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Sneha Mishra
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Sukanya Raghu
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Arvind Singh Bhati
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Ankit Kumar Tamta
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Subhajit Dasgupta
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Ullas Kolthur-Seetharam
- Tata Institute of Fundamental Research, Colaba, Mumbai, India; Tata Institute of Fundamental Research, Hyderabad, India
| | | | - Raul Mostoslavsky
- The Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA
| | | | | | - Nagalingam Ravi Sundaresan
- Cardiovascular and Muscle Research Laboratory, Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India.
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7
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Shu H, Peng Y, Hang W, Nie J, Zhou N, Wang DW. The role of CD36 in cardiovascular disease. Cardiovasc Res 2020; 118:115-129. [PMID: 33210138 PMCID: PMC8752351 DOI: 10.1093/cvr/cvaa319] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 10/29/2020] [Indexed: 12/13/2022] Open
Abstract
CD36, also known as the scavenger receptor B2, is a multifunctional receptor widely expressed in various organs. CD36 plays a crucial role in the uptake of long-chain fatty acids, the main metabolic substrate in myocardial tissue. The maturation and transportation of CD36 is regulated by post-translational modifications, including phosphorylation, ubiquitination, glycosylation, and palmitoylation. CD36 is decreased in pathological cardiac hypertrophy caused by ischaemia-reperfusion and pressure overload, and increased in diabetic cardiomyopathy and atherosclerosis. Deficiency of CD36 alleviates diabetic cardiomyopathy and atherosclerosis, while overexpression of CD36 eliminates ischaemia-reperfusion damage, together suggesting that CD36 is closely associated with the progression of cardiovascular diseases and may be a new therapeutic target. This review summarizes the regulation and post-translational modifications of CD36 and evaluates its role in cardiovascular diseases and its potential as a therapeutic target.
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Affiliation(s)
- Hongyang Shu
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China.,Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiologic Disorders, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Yizhong Peng
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Weijian Hang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China.,Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiologic Disorders, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Jiali Nie
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China.,Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiologic Disorders, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Ning Zhou
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China.,Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiologic Disorders, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Dao Wen Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China.,Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiologic Disorders, Huazhong University of Science and Technology, Wuhan 430000, China
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8
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Mitochondrial Ca 2+ regulation in the etiology of heart failure: physiological and pathophysiological implications. Acta Pharmacol Sin 2020; 41:1301-1309. [PMID: 32694759 PMCID: PMC7608470 DOI: 10.1038/s41401-020-0476-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/04/2020] [Accepted: 07/06/2020] [Indexed: 12/14/2022] Open
Abstract
Heart failure (HF) represents one of the leading causes of cardiovascular diseases with high rates of hospitalization, morbidity and mortality worldwide. Ample evidence has consolidated a crucial role for mitochondrial injury in the progression of HF. It is well established that mitochondrial Ca2+ participates in the regulation of a wide variety of biological processes, including oxidative phosphorylation, ATP synthesis, reactive oxygen species (ROS) generation, mitochondrial dynamics and mitophagy. Nonetheless, mitochondrial Ca2+ overload stimulates mitochondrial permeability transition pore (mPTP) opening and mitochondrial swelling, resulting in mitochondrial injury, apoptosis, cardiac remodeling, and ultimately development of HF. Moreover, mitochondria possess a series of Ca2+ transport influx and efflux channels, to buffer Ca2+ in the cytoplasm. Interaction at mitochondria-associated endoplasmic reticulum membranes (MAMs) may also participate in the regulation of mitochondrial Ca2+ homeostasis and plays an essential role in the progression of HF. Here, we provide an overview of regulation of mitochondrial Ca2+ homeostasis in maintenance of cardiac function, in an effort to identify novel therapeutic strategies for the management of HF.
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9
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Harvey AP, Robinson E, Edgar KS, McMullan R, O’Neill KM, Alderdice M, Amirkhah R, Dunne PD, McDermott BJ, Grieve DJ. Downregulation of PPARα during Experimental Left Ventricular Hypertrophy Is Critically Dependent on Nox2 NADPH Oxidase Signalling. Int J Mol Sci 2020; 21:E4406. [PMID: 32575797 PMCID: PMC7352162 DOI: 10.3390/ijms21124406] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/17/2020] [Accepted: 06/18/2020] [Indexed: 12/31/2022] Open
Abstract
Pressure overload-induced left ventricular hypertrophy (LVH) is initially adaptive but ultimately promotes systolic dysfunction and chronic heart failure. Whilst underlying pathways are incompletely understood, increased reactive oxygen species generation from Nox2 NADPH oxidases, and metabolic remodelling, largely driven by PPARα downregulation, are separately implicated. Here, we investigated interaction between the two as a key regulator of LVH using in vitro, in vivo and transcriptomic approaches. Phenylephrine-induced H9c2 cardiomyoblast hypertrophy was associated with reduced PPARα expression and increased Nox2 expression and activity. Pressure overload-induced LVH and systolic dysfunction induced in wild-type mice by transverse aortic constriction (TAC) for 7 days, in association with Nox2 upregulation and PPARα downregulation, was enhanced in PPARα-/- mice and prevented in Nox2-/- mice. Detailed transcriptomic analysis revealed significantly altered expression of genes relating to PPARα, oxidative stress and hypertrophy pathways in wild-type hearts, which were unaltered in Nox2-/- hearts, whilst oxidative stress pathways remained dysregulated in PPARα-/- hearts following TAC. Network analysis indicated that Nox2 was essential for PPARα downregulation in this setting and identified preferential inflammatory pathway modulation and candidate cytokines as upstream Nox2-sensitive regulators of PPARα signalling. Together, these data suggest that Nox2 is a critical driver of PPARα downregulation leading to maladaptive LVH.
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Affiliation(s)
- Adam P. Harvey
- Wellcome-Wolfson Institute for Experimental Medicine, Queen’s University Belfast, Belfast BT9 7AE, UK; (A.P.H.); (E.R.); (K.S.E.); (R.M.); (K.M.O.); (B.J.M.)
| | - Emma Robinson
- Wellcome-Wolfson Institute for Experimental Medicine, Queen’s University Belfast, Belfast BT9 7AE, UK; (A.P.H.); (E.R.); (K.S.E.); (R.M.); (K.M.O.); (B.J.M.)
| | - Kevin S. Edgar
- Wellcome-Wolfson Institute for Experimental Medicine, Queen’s University Belfast, Belfast BT9 7AE, UK; (A.P.H.); (E.R.); (K.S.E.); (R.M.); (K.M.O.); (B.J.M.)
| | - Ross McMullan
- Wellcome-Wolfson Institute for Experimental Medicine, Queen’s University Belfast, Belfast BT9 7AE, UK; (A.P.H.); (E.R.); (K.S.E.); (R.M.); (K.M.O.); (B.J.M.)
| | - Karla M. O’Neill
- Wellcome-Wolfson Institute for Experimental Medicine, Queen’s University Belfast, Belfast BT9 7AE, UK; (A.P.H.); (E.R.); (K.S.E.); (R.M.); (K.M.O.); (B.J.M.)
| | - Matthew Alderdice
- Patrick G Johnston Centre for Cancer Research, Queen’s University Belfast, Belfast BT7 1NN, UK; (M.A.); (R.A.); (P.D.D.)
| | - Raheleh Amirkhah
- Patrick G Johnston Centre for Cancer Research, Queen’s University Belfast, Belfast BT7 1NN, UK; (M.A.); (R.A.); (P.D.D.)
| | - Philip D. Dunne
- Patrick G Johnston Centre for Cancer Research, Queen’s University Belfast, Belfast BT7 1NN, UK; (M.A.); (R.A.); (P.D.D.)
| | - Barbara J. McDermott
- Wellcome-Wolfson Institute for Experimental Medicine, Queen’s University Belfast, Belfast BT9 7AE, UK; (A.P.H.); (E.R.); (K.S.E.); (R.M.); (K.M.O.); (B.J.M.)
| | - David J. Grieve
- Wellcome-Wolfson Institute for Experimental Medicine, Queen’s University Belfast, Belfast BT9 7AE, UK; (A.P.H.); (E.R.); (K.S.E.); (R.M.); (K.M.O.); (B.J.M.)
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10
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Lorenzo-Almorós A, Cepeda-Rodrigo JM, Lorenzo Ó. Diabetic cardiomyopathy. Rev Clin Esp 2020; 222:S0014-2565(20)30025-4. [PMID: 32107015 DOI: 10.1016/j.rce.2019.10.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 10/13/2019] [Accepted: 10/21/2019] [Indexed: 01/09/2023]
Abstract
The relationship between diabetes and heart failure is complex and bidirectional. Nevertheless, the existence of a cardiomyopathy attributable exclusively to diabetes has been and is still the subject of controversy, due, among other reasons, to a lack of a consensus definition. There is also no unanimous agreement in terms of the physiopathogenic findings that need to be present in the definition of diabetic cardiomyopathy or on its classification, which, added to the lack of diagnostic methods and treatments specific for this disease, limits its general understanding. Studies conducted on diabetic cardiomyopathy, however, suggest a unique physiopathogenesis different from that of other diseases. Similarly, new treatments have been shown to play a potential role in this disease. The following review provides an update on diabetic cardiomyopathy.
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Affiliation(s)
- A Lorenzo-Almorós
- Servicio de Medicina Interna, Fundación Jiménez Díaz. Madrid, España.
| | - J M Cepeda-Rodrigo
- Servicio de Medicina Interna, Hospital Vega Baja, Orihuela, Alicante, España
| | - Ó Lorenzo
- Laboratorio de Renal, Vascular y Diabetes, IIS Fundación Jiménez-Díaz, Universidad Autónoma de Madrid, Madrid, España
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11
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Andersson C, Lin H, Liu C, Levy D, Mitchell GF, Larson MG, Vasan RS. Integrated Multiomics Approach to Identify Genetic Underpinnings of Heart Failure and Its Echocardiographic Precursors. CIRCULATION-GENOMIC AND PRECISION MEDICINE 2019; 12:e002489. [DOI: 10.1161/circgen.118.002489] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Background:
Heart failure (HF) may arise from alterations in metabolic, structural, and signaling pathways, but its genetic architecture is incompletely understood. To elucidate potential genetic contributors to cardiac remodeling and HF, we integrated genome-wide single-nucleotide polymorphisms, gene expression, and DNA methylation using a transomics analytical approach.
Methods:
We used robust rank aggregation (where the position of a certain gene in a rank order list [based on statistical significance level] is tested against a randomly shuffled rank order list) to derive an integrative transomic score for each annotated gene associated with a HF trait.
Results:
We evaluated ≤8372 FHS (Framingham Heart Study) participants (54% women; mean age, 55±17 years). Of these, 62 (0.7%) and 35 (0.4%) had prevalent HF with reduced ejection fraction and HF with preserved left ventricular ejection fraction, respectively. During a mean follow-up of 8.5 years (minimum–maximum, 0.005–18.6 years), 223 (2.7%) and 234 (2.8%) individuals developed incident HF with reduced ejection fraction and HF with reduced ejection fraction, respectively. Top genes included
MMP20
and
MTSS1
(promotes actin assembly at intercellular junctions) for left ventricular systolic function;
ITGA9
(receptor for
VCAM1
[vascular cell protein 1]) and
C5
for left ventricular remodeling;
NUP210
(expressed during myogenic differentiation) and
ANK1
(cytoskeletal protein) for diastolic function;
TSPAN16
and
RAB11FIP3
(involved in regulation of actin cytoskeleton) for prevalent HF with reduced ejection fraction;
ANKRD13D
and
TRIM69
for incident HF with reduced ejection fraction;
HPCAL1
and
PTTG1IP
for prevalent HF with reduced ejection fraction; and
ZNF146
(close to the
COX7A1
enzyme) and
ZFP3
(close to
SLC52A1
—the riboflavin transporter) for incident HF with reduced ejection fraction. We tested the HF-related top single-nucleotide polymorphisms in the UK biobank, where
rs77059055
in
TPM1
(minor allele frequency, 0.023; odds ratio, 0.83;
P
=0.002) remained statistically significant upon Bonferroni correction.
Conclusions:
Our integrative transomics approach offers insights into potential molecular and genetic contributors to HF and its precursors. Although several of our candidate genes have been implicated in HF in animal models, independent replication is warranted.
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Affiliation(s)
- Charlotte Andersson
- Framingham Heart Study, MA (C.A., H.L., C.L., D.L., M.G.L., R.S.V.)
- Department of Cardiology, Herlev and Gentofte Hospital, Herlev, Denmark (C.A.)
| | - Honghuang Lin
- Framingham Heart Study, MA (C.A., H.L., C.L., D.L., M.G.L., R.S.V.)
- Section of Computational Biomedicine, Department of Medicine (H.L.), Boston University School of Medicine, MA
| | - Chunyu Liu
- Framingham Heart Study, MA (C.A., H.L., C.L., D.L., M.G.L., R.S.V.)
- Department of Biostatistics (C.L., M.G.L.), Boston University School of Public Health, MA
| | - Daniel Levy
- Framingham Heart Study, MA (C.A., H.L., C.L., D.L., M.G.L., R.S.V.)
- Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD (D.L.)
| | | | - Martin G. Larson
- Framingham Heart Study, MA (C.A., H.L., C.L., D.L., M.G.L., R.S.V.)
- Department of Biostatistics (C.L., M.G.L.), Boston University School of Public Health, MA
| | - Ramachandran S. Vasan
- Framingham Heart Study, MA (C.A., H.L., C.L., D.L., M.G.L., R.S.V.)
- Sections of Preventive Medicine and Epidemiology and Cardiology, Department of Medicine (R.S.V.), Boston University School of Medicine, MA
- Department of Epidemiology (R.S.V.), Boston University School of Public Health, MA
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12
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Astragaloside IV inhibits ventricular remodeling and improves fatty acid utilization in rats with chronic heart failure. Biosci Rep 2018; 38:BSR20171036. [PMID: 29301869 PMCID: PMC6048210 DOI: 10.1042/bsr20171036] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 01/02/2018] [Accepted: 01/04/2018] [Indexed: 12/24/2022] Open
Abstract
Chronic heart failure (CHF) is the end-stage of many cardiovascular diseases and severely affects the patients’ lifespan. Inhibiting ventricular remodeling is thus a primary treatment target for CHF patients. Astragaloside IV (AS-IV) can improve cardiac function and protect myocardial cells. The study aims to investigate the effects of AS-IV on ventricular remodeling and explore its role in regulating energy metabolism using a rat CHF model. Sprague–Dawley rats were divided into five groups (n=20 per group): CHF + benazepril hydrochloride (Benazepril HCL), CHF + low-dose (30 mg.kg−1.day−1) AS-IV, CHF + high-dose (60 mg.kg−1.day−1) AS-IV, and a sham control group. After 8 weeks of treatment, the cardiac structure and functional parameters were measured. Morphological changes in the myocardial tissue in five groups were evaluated. Protein and mRNA expression of peroxisome proliferator-activated receptor α (PPARα), medium-chain acyl-CoA dehydrogenase (MCAD), and muscle carnitine palmitoyl transferase-1 (MCPT1) were also analyzed. Our results showed that the left ventricular mass index (LVMI), collagen volume fraction (CVF), and free fatty acid (FFA) concentration of CHF group rats increased when compared with sham control group, while the protein and mRNA expressions of PPARα, MCAD, and MCPT1 decreased in CHF. Importantly, treatment with AS-IV (CHF + AS-IV group) showed improved heart function and structure, increased expression of PPARα, MCAD, and MCPT1 and improved FFA utilization in comparison with CHF group. In conclusion, our study shows that AS-IV inhibits ventricular remodeling, improves cardiac function, and decreases FFA concentration of CHF model rats. Our findings suggest a therapeutic potential of using AS-IV in CHF.
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13
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Two-pore channels and disease. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2018; 1865:1678-1686. [PMID: 29746898 PMCID: PMC6162333 DOI: 10.1016/j.bbamcr.2018.05.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 05/03/2018] [Indexed: 01/25/2023]
Abstract
Two-pore channels (TPCs) are Ca2+-permeable endo-lysosomal ion channels subject to multi-modal regulation. They mediate their physiological effects through releasing Ca2+ from acidic organelles in response to cues such as the second messenger, NAADP. Here, we review emerging evidence linking TPCs to disease. We discuss how perturbing both local and global Ca2+ changes mediated by TPCs through chemical and/or molecular manipulations can induce or reverse disease phenotypes. We cover evidence from models of Parkinson's disease, non-alcoholic fatty liver disease, Ebola infection, cancer, cardiac dysfunction and diabetes. A need for more drugs targeting TPCs is identified.
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14
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Sex differences in murine myocardium are not exclusively regulated by gonadal hormones. J Proteomics 2018; 178:43-56. [PMID: 29277644 DOI: 10.1016/j.jprot.2017.12.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 12/06/2017] [Accepted: 12/11/2017] [Indexed: 11/23/2022]
Abstract
We investigated sex differences in cardiac protein patterns of intact and castrated mice using proteomics and 1D and 2D immunoblotting. To exclude differences concerning developmental aspects gonadectomy was conducted in mature mice at the age of three months. The main sex-related regulation in the protein pattern of the myocardium occurred for proteins involved in metabolic processes whereas only few proteins involved in other pathways underwent a regulation. Many regulated proteins (2/3) displayed a characteristic V form, which means that these proteins are up- or down-regulated in sexually mature compared to young mice and are back-regulated after castration, emphasizing a direct regulation by gonadal hormones. Several other spots (1/3) showed the same male/female regulation or a drastic increase in male/female spot intensity ratio after castration, suggesting either a regulation independent of sex hormones or a removal of an inhibiting feedback mechanism by gonadectomy. Technically, we found that it cannot be expected that a single spot contains only one protein species and that one protein is present in only one spot. We thus propose for proteomic investigations to identify/quantify all spots of a 2-DE pattern to obtain information about protein speciation and its potential importance for function and pathology. BIOLOGICAL SIGNIFICANCE Sex related differences in cardiovascular disease, including risk factors, disease manifestation and outcomes, are far from being well understood, and improved biological understanding of these differences in the healthy myocardium is of great importance. We investigated sex related changes of myocardial protein pattern in intact and castrated mice at different ages and found metabolic proteins to be highly regulated, some of which independently from gonadal hormones.
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15
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Lipotoxicity in Obesity: Benefit of Olive Oil. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 960:607-617. [PMID: 28585218 DOI: 10.1007/978-3-319-48382-5_26] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The clinical implication of Lipotoxicity in obesity derives primarily from its potential to progress to insulin resistance, endothelial dysfunction and atherosclerosis. Olive oil rich diet decrease accumulation of triglyceride in the liver, improved postprandial triglyceride levels, improve glucose and GLP-1 response in insulin resistant subjects, and up regulate GLUT-2 expression in the liver. The exact molecular mechanism is unknown but, decreasing NFkB activation, decreasing LDL oxidation and improving insulin resistance by less production of inflammatory cytokines (TNF-a, IL-6) and improvement of kinases JNK-mediated phosphorylation of IRS-1 are the principle mechanisms. The beneficial effect of the Mediterranean diet derived from monounsaturated fatty acids (MUFA), mainly from olive oil. In this review we document lipotoxicity in obesity and the benefit of olive oil.
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16
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Roura S, Gálvez-Montón C, de Gonzalo-Calvo D, Valero AG, Gastelurrutia P, Revuelta-López E, Prat-Vidal C, Soler-Botija C, Llucià-Valldeperas A, Perea-Gil I, Iborra-Egea O, Borràs FE, Lupón J, Llorente-Cortés V, Bayes-Genis A. Extracellular vesicles do not contribute to higher circulating levels of soluble LRP1 in idiopathic dilated cardiomyopathy. J Cell Mol Med 2017; 21:3000-3009. [PMID: 28557183 PMCID: PMC5661250 DOI: 10.1111/jcmm.13211] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 02/28/2017] [Indexed: 12/18/2022] Open
Abstract
Idiopathic dilated cardiomyopathy (IDCM) is a frequent cause of heart transplantation. Potentially valuable blood markers are being sought, and low‐density lipoprotein receptor‐related protein 1 (LRP1) has been linked to the underlying molecular basis of the disease. This study compared circulating levels of soluble LRP1 (sLRP1) in IDCM patients and healthy controls and elucidated whether sLRP1 is exported out of the myocardium through extracellular vesicles (EVs) to gain a better understanding of the pathogenesis of the disease. LRP1 α chain expression was analysed in samples collected from the left ventricles of explanted hearts using immunohistochemistry. sLRP1 concentrations were determined in platelet‐free plasma by enzyme‐linked immunosorbent assay. Plasma‐derived EVs were extracted by size‐exclusion chromatography (SEC) and characterized by nanoparticle tracking analysis and cryo‐transmission electron microscopy. The distributions of vesicular (CD9, CD81) and myocardial (caveolin‐3) proteins and LRP1 α chain were assessed in SEC fractions by flow cytometry. LRP1 α chain was preferably localized to blood vessels in IDCM compared to control myocardium. Circulating sLRP1 was increased in IDCM patients. CD9‐ and CD81‐positive fractions enriched with membrane vesicles with the expected size and morphology were isolated from both groups. The LRP1 α chain was not present in these SEC fractions, which were also positive for caveolin‐3. The increase in circulating sLRP1 in IDCM patients may be clinically valuable. Although EVs do not contribute to higher sLRP1 levels in IDCM, a comprehensive analysis of EV content would provide further insights into the search for novel blood markers.
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Affiliation(s)
- Santiago Roura
- Heart Failure and Cardiac Regeneration (ICREC) Research Program, Health Science Research Institute Germans Trias i Pujol (IGTP), Badalona, Spain.,Center of Regenerative Medicine in Barcelona, Barcelona, Spain.,CIBERCV, Instituto de Salud Carlos III, Madrid, Spain
| | - Carolina Gálvez-Montón
- Heart Failure and Cardiac Regeneration (ICREC) Research Program, Health Science Research Institute Germans Trias i Pujol (IGTP), Badalona, Spain.,CIBERCV, Instituto de Salud Carlos III, Madrid, Spain
| | - David de Gonzalo-Calvo
- CIBERCV, Instituto de Salud Carlos III, Madrid, Spain.,Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Ana Gámez Valero
- Innovation in Vesicles and Cells for Application in Therapy Group, IGTP, Badalona, Spain
| | - Paloma Gastelurrutia
- Heart Failure and Cardiac Regeneration (ICREC) Research Program, Health Science Research Institute Germans Trias i Pujol (IGTP), Badalona, Spain.,CIBERCV, Instituto de Salud Carlos III, Madrid, Spain
| | - Elena Revuelta-López
- Heart Failure and Cardiac Regeneration (ICREC) Research Program, Health Science Research Institute Germans Trias i Pujol (IGTP), Badalona, Spain
| | - Cristina Prat-Vidal
- Heart Failure and Cardiac Regeneration (ICREC) Research Program, Health Science Research Institute Germans Trias i Pujol (IGTP), Badalona, Spain.,CIBERCV, Instituto de Salud Carlos III, Madrid, Spain
| | - Carolina Soler-Botija
- Heart Failure and Cardiac Regeneration (ICREC) Research Program, Health Science Research Institute Germans Trias i Pujol (IGTP), Badalona, Spain.,CIBERCV, Instituto de Salud Carlos III, Madrid, Spain
| | - Aida Llucià-Valldeperas
- Heart Failure and Cardiac Regeneration (ICREC) Research Program, Health Science Research Institute Germans Trias i Pujol (IGTP), Badalona, Spain
| | - Isaac Perea-Gil
- Heart Failure and Cardiac Regeneration (ICREC) Research Program, Health Science Research Institute Germans Trias i Pujol (IGTP), Badalona, Spain
| | - Oriol Iborra-Egea
- Heart Failure and Cardiac Regeneration (ICREC) Research Program, Health Science Research Institute Germans Trias i Pujol (IGTP), Badalona, Spain
| | - Francesc E Borràs
- Innovation in Vesicles and Cells for Application in Therapy Group, IGTP, Badalona, Spain.,Nephrology Service, Germans Trias i Pujol University Hospital (HUGTiP), Badalona, Spain
| | - Josep Lupón
- CIBERCV, Instituto de Salud Carlos III, Madrid, Spain.,Cardiology Service, HUGTiP, Badalona, Spain.,Department of Medicine, Barcelona Autonomous University (UAB), Barcelona, Spain
| | - Vicenta Llorente-Cortés
- CIBERCV, Instituto de Salud Carlos III, Madrid, Spain.,Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), Barcelona, Spain
| | - Antoni Bayes-Genis
- Heart Failure and Cardiac Regeneration (ICREC) Research Program, Health Science Research Institute Germans Trias i Pujol (IGTP), Badalona, Spain.,CIBERCV, Instituto de Salud Carlos III, Madrid, Spain.,Cardiology Service, HUGTiP, Badalona, Spain.,Department of Medicine, Barcelona Autonomous University (UAB), Barcelona, Spain
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17
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Mitophagy and Mitochondrial Quality Control Mechanisms in the Heart. CURRENT PATHOBIOLOGY REPORTS 2017; 5:161-169. [PMID: 29082112 DOI: 10.1007/s40139-017-0133-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE OF REVIEW Mitochondrial homeostasis and quality control are essential to maintenance of cardiac function and a disruption of this pathway can lead to deleterious cardiac consequences. RECENT FINDINGS Mitochondrial quality control has been described as a major homeostatic mechanism in cell. Recent studies highlighted that an impairment of mitochondrial quality control in different cell or mouse models is linked to cardiac dysfunction. Moreover, some conditions as aging, genetic mutations or obesity have been associated with mitochondrial quality control alteration leading to an accumulation of damaged mitochondria responsible for increased production of reactive oxygen species, metabolic inflexibility, and inflammation, all of which can have sustained effects on cardiac cell function and even cell death. SUMMARY In this review, we describe the major mechanisms of mitochondrial quality control, factors that can impair mitochondrial quality control, and the consequences of disrupted mitochondrial quality control.
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18
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Abstract
Diabetic cardiomyopathy (DCM) is a cardiac dysfunction which affects approximately 12% of diabetic patients, leading to overt heart failure and death. However, there is not an efficient and specific methodology for DCM diagnosis, possibly because molecular mechanisms are not fully elucidated, and it remains asymptomatic for many years. Also, DCM frequently coexists with other comorbidities such as hypertension, obesity, dyslipidemia, and vasculopathies. Thus, human DCM is not specifically identified after heart failure is established. In this sense, echocardiography has been traditionally considered the gold standard imaging test to evaluate the presence of cardiac dysfunction, although other techniques may cover earlier DCM detection by quantification of altered myocardial metabolism and strain. In this sense, Phase-Magnetic Resonance Imaging and 2D/3D-Speckle Tracking Echocardiography may potentially diagnose and stratify diabetic patients. Additionally, this information could be completed with a quantification of specific plasma biomarkers related to related to initial stages of the disease. Cardiotrophin-1, activin A, insulin-like growth factor binding protein-7 (IGFBP-7) and Heart fatty-acid binding protein have demonstrated a stable positive correlation with cardiac hypertrophy, contractibility and steatosis responses. Thus, we suggest a combination of minimally-invasive diagnosis tools for human DCM recognition based on imaging techniques and measurements of related plasma biomarkers.
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19
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Abstract
Organellar two-pore channels (TPCs) contain two copies of a Shaker-like six-transmembrane (6-TM) domain in each subunit and are ubiquitously expressed in plants and animals. Interestingly, plant and animal TPCs share high sequence similarity in the filter region, yet exhibit drastically different ion selectivity. Plant TPC1 functions as a nonselective cation channel on the vacuole membrane, whereas mammalian TPC channels have been shown to be endo/lysosomal Na+-selective or Ca2+-release channels. In this study, we performed systematic characterization of the ion selectivity of TPC1 from Arabidopsis thaliana (AtTPC1) and compared its selectivity with the selectivity of human TPC2 (HsTPC2). We demonstrate that AtTPC1 is selective for Ca2+ over Na+, but nonselective among monovalent cations (Li+, Na+, and K+). Our results also confirm that HsTPC2 is a Na+-selective channel activated by phosphatidylinositol 3,5-bisphosphate. Guided by our recent structure of AtTPC1, we converted AtTPC1 to a Na+-selective channel by mimicking the selectivity filter of HsTPC2 and identified key residues in the TPC filters that differentiate the selectivity between AtTPC1 and HsTPC2. Furthermore, the structure of the Na+-selective AtTPC1 mutant elucidates the structural basis for Na+ selectivity in mammalian TPCs.
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20
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García-Rúa V, Feijóo-Bandín S, García-Vence M, Aragón-Herrera A, Bravo SB, Rodríguez-Penas D, Mosquera-Leal A, Lear PV, Parrington J, Alonso J, Roselló-Lletí E, Portolés M, Rivera M, González-Juanatey JR, Lago F. Metabolic alterations derived from absence of Two-Pore Channel 1 at cardiac level. J Biosci 2016; 41:643-658. [DOI: 10.1007/s12038-016-9647-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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21
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Feijóo-Bandín S, García-Vence M, García-Rúa V, Roselló-Lletí E, Portolés M, Rivera M, González-Juanatey JR, Lago F. Two-pore channels (TPCs): Novel voltage-gated ion channels with pleiotropic functions. Channels (Austin) 2016; 11:20-33. [PMID: 27440385 DOI: 10.1080/19336950.2016.1213929] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Two-pore channels (TPC1-3) comprise a subfamily of the eukaryotic voltage-gated ion channels (VGICs) superfamily that are mainly expressed in acidic stores in plants and animals. TPCS are widespread across the animal kingdom, with primates, mice and rats lacking TPC3, and mainly act as Ca+ and Na+ channels, although it was also suggested that they could be permeable to other ions. Nowadays, TPCs have been related to the development of different diseases, including Parkinson´s disease, obesity or myocardial ischemia. Due to this, their study has raised the interest of the scientific community to try to understand their mechanism of action in order to be able to develop an efficient drug that could regulate TPCs activity. In this review, we will provide an updated view regarding TPCs structure, function and activation, as well as their role in different pathophysiological processes.
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Affiliation(s)
- Sandra Feijóo-Bandín
- a Cellular and Molecular Cardiology Research Unit and Department of Cardiology , Institute of Biomedical Research and University Clinical Hospital , Santiago de Compostela , Spain
| | - María García-Vence
- a Cellular and Molecular Cardiology Research Unit and Department of Cardiology , Institute of Biomedical Research and University Clinical Hospital , Santiago de Compostela , Spain
| | - Vanessa García-Rúa
- a Cellular and Molecular Cardiology Research Unit and Department of Cardiology , Institute of Biomedical Research and University Clinical Hospital , Santiago de Compostela , Spain
| | - Esther Roselló-Lletí
- b Cardiocirculatory Unit, Health Institute of La Fe University Hospital , Valencia , Spain
| | - Manuel Portolés
- b Cardiocirculatory Unit, Health Institute of La Fe University Hospital , Valencia , Spain
| | - Miguel Rivera
- b Cardiocirculatory Unit, Health Institute of La Fe University Hospital , Valencia , Spain
| | - José Ramón González-Juanatey
- a Cellular and Molecular Cardiology Research Unit and Department of Cardiology , Institute of Biomedical Research and University Clinical Hospital , Santiago de Compostela , Spain
| | - Francisca Lago
- a Cellular and Molecular Cardiology Research Unit and Department of Cardiology , Institute of Biomedical Research and University Clinical Hospital , Santiago de Compostela , Spain
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22
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Palmitic acid interferes with energy metabolism balance by adversely switching the SIRT1-CD36-fatty acid pathway to the PKC zeta-GLUT4-glucose pathway in cardiomyoblasts. J Nutr Biochem 2016; 31:137-49. [DOI: 10.1016/j.jnutbio.2016.01.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 12/24/2015] [Accepted: 01/06/2016] [Indexed: 12/19/2022]
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23
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Feijóo-Bandín S, Rodríguez-Penas D, García-Rúa V, Mosquera-Leal A, Abu-Assi E, Portolés M, Roselló-Lletí E, Rivera M, Diéguez C, González-Juanatey JR, Lago F. 24 h nesfatin-1 treatment promotes apoptosis in cardiomyocytes. Endocrine 2016; 51:551-5. [PMID: 26044141 DOI: 10.1007/s12020-015-0648-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 06/01/2015] [Indexed: 11/27/2022]
Affiliation(s)
- Sandra Feijóo-Bandín
- Cellular and Molecular Cardiology Research Unit (7), Department of Cardiology, Institute of Biomedical Research (IDIS), Planta -2, Edificio de Consultas Externas, University of Santiago de Compostela Clinical Hospital, 15706, Santiago De Compostela, Spain
| | - Diego Rodríguez-Penas
- Cellular and Molecular Cardiology Research Unit (7), Department of Cardiology, Institute of Biomedical Research (IDIS), Planta -2, Edificio de Consultas Externas, University of Santiago de Compostela Clinical Hospital, 15706, Santiago De Compostela, Spain
| | - Vanessa García-Rúa
- Cellular and Molecular Cardiology Research Unit (7), Department of Cardiology, Institute of Biomedical Research (IDIS), Planta -2, Edificio de Consultas Externas, University of Santiago de Compostela Clinical Hospital, 15706, Santiago De Compostela, Spain
| | - Ana Mosquera-Leal
- Cellular and Molecular Cardiology Research Unit (7), Department of Cardiology, Institute of Biomedical Research (IDIS), Planta -2, Edificio de Consultas Externas, University of Santiago de Compostela Clinical Hospital, 15706, Santiago De Compostela, Spain
| | - Emad Abu-Assi
- Cellular and Molecular Cardiology Research Unit (7), Department of Cardiology, Institute of Biomedical Research (IDIS), Planta -2, Edificio de Consultas Externas, University of Santiago de Compostela Clinical Hospital, 15706, Santiago De Compostela, Spain
| | | | | | | | - Carlos Diéguez
- Department of Physiology, Institute of Biomedical Research, University Clinical Hospital, 15706, Santiago De Compostela, Spain
| | - José Ramón González-Juanatey
- Cellular and Molecular Cardiology Research Unit (7), Department of Cardiology, Institute of Biomedical Research (IDIS), Planta -2, Edificio de Consultas Externas, University of Santiago de Compostela Clinical Hospital, 15706, Santiago De Compostela, Spain
| | - Francisca Lago
- Cellular and Molecular Cardiology Research Unit (7), Department of Cardiology, Institute of Biomedical Research (IDIS), Planta -2, Edificio de Consultas Externas, University of Santiago de Compostela Clinical Hospital, 15706, Santiago De Compostela, Spain.
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24
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The Correlation of PPARα Activity and Cardiomyocyte Metabolism and Structure in Idiopathic Dilated Cardiomyopathy during Heart Failure Progression. PPAR Res 2016; 2016:7508026. [PMID: 26981112 PMCID: PMC4770161 DOI: 10.1155/2016/7508026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 01/11/2016] [Indexed: 12/20/2022] Open
Abstract
This study aimed to define relationship between PPARα expression and metabolic-structural characteristics during HF progression in hearts with DCM phenotype. Tissue endomyocardial biopsy samples divided into three groups according to LVEF ((I) 45–50%, n = 10; (II) 30–40%, n = 15; (III) <30%, n = 15; and control (donor hearts, >60%, n = 6)) were investigated. The PPARα mRNA expression in the failing hearts was low in Group (I), high in Group (II), and comparable to that of the control in Group (III). There were analogous changes in the expression of FAT/CD36 and CPT-1 mRNA in contrast to continuous overexpression of GLUT-4 mRNA and significant increase of PDK-4 mRNA in Group (II). In addition, significant structural changes of cardiomyocytes with glycogen accumulation were accompanied by increased expression of PPARα. For the entire study population with HF levels of FAT/CD36 mRNA showed a strong tendency of negative correlation with LVEF. In conclusion, PPARα elevated levels may be a direct cause of adverse remodeling, both metabolic and structural. Thus, there is limited time window for therapy modulating cardiac metabolism and protecting cardiomyocyte structure in failing heart.
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25
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García-Rúa V, Feijóo-Bandín S, Rodríguez-Penas D, Mosquera-Leal A, Abu-Assi E, Beiras A, María Seoane L, Lear P, Parrington J, Portolés M, Roselló-Lletí E, Rivera M, Gualillo O, Parra V, Hill JA, Rothermel B, González-Juanatey JR, Lago F. Endolysosomal two-pore channels regulate autophagy in cardiomyocytes. J Physiol 2016; 594:3061-77. [PMID: 26757341 DOI: 10.1113/jp271332] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 12/28/2015] [Indexed: 01/12/2023] Open
Abstract
KEY POINTS Two-pore channels (TPCs) were identified as a novel family of endolysosome-targeted calcium release channels gated by nicotinic acid adenine dinucleotide phosphate, as also as intracellular Na(+) channels able to control endolysosomal fusion, a key process in autophagic flux. Autophagy, an evolutionarily ancient response to cellular stress, has been implicated in the pathogenesis of a wide range of cardiovascular pathologies, including heart failure. We report direct evidence indicating that TPCs are involved in regulating autophagy in cardiomyocytes, and that TPC knockout mice show alterations in the cardiac lysosomal system. TPC downregulation implies a decrease in the viability of cardiomyocytes under starvation conditions. In cardiac tissues from both humans and rats, TPC transcripts and protein levels were higher in females than in males, and correlated negatively with markers of autophagy. We conclude that the endolysosomal channels TPC1 and TPC2 are essential for appropriate basal and induced autophagic flux in cardiomyocytes, and also that they are differentially expressed in male and female hearts. ABSTRACT Autophagy participates in physiological and pathological remodelling of the heart. The endolysosomal two-pore channels (TPCs), TPC1 and TPC2, have been implicated in the regulation of autophagy. The present study aimed to investigate the role of TPC1 and TPC2 in basal and induced cardiac autophagic activity. In cultured cardiomyocytes, starvation induced a significant increase in TPC1 and TPC2 transcripts and protein levels that paralleled the increase in autophagy identified by increased LC3-II and decreased p62 levels. Small interfering RNA depletion of TPC2 alone or together with TPC1 increased both LC3II and p62 levels under basal conditions and in response to serum starvation, suggesting that, under conditions of severe energy depletion (serum plus glucose starvation), changes in the autophagic flux (as assessed by use of bafilomycin A1) occurred either when TPC1 or TPC2 were downregulated. The knockdown of TPCs diminished cardiomyocyte viability under starvation and simulated ischaemia. Electron micrographs of hearts from TPC1/2 double knockout mice showed that cardiomyocytes contained large numbers of immature lysosomes with diameters significantly smaller than those of wild-type mice. In cardiac tissues from humans and rats, TPC1 and TPC2 transcripts and protein levels were higher in females than in males. Furthermore, transcript levels of TPCs correlated negatively with p62 levels in heart tissues. TPC1 and TPC2 are essential for appropriate basal and induced autophagic flux in cardiomyocytes (i.e. there is a negative effect on cell viability under stress conditions in their absence) and they are differentially expressed in male and female human and murine hearts, where they correlate with markers of autophagy.
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Affiliation(s)
- Vanessa García-Rúa
- Department of Cellular and Molecular Cardiology, Institute of Biomedical Research (IDIS-SERGAS), Santiago de Compostela, Spain
| | - Sandra Feijóo-Bandín
- Department of Cellular and Molecular Cardiology, Institute of Biomedical Research (IDIS-SERGAS), Santiago de Compostela, Spain
| | - Diego Rodríguez-Penas
- Department of Cellular and Molecular Cardiology, Institute of Biomedical Research (IDIS-SERGAS), Santiago de Compostela, Spain
| | - Ana Mosquera-Leal
- Department of Cellular and Molecular Cardiology, Institute of Biomedical Research (IDIS-SERGAS), Santiago de Compostela, Spain
| | - Emad Abu-Assi
- Department of Cellular and Molecular Cardiology, Institute of Biomedical Research (IDIS-SERGAS), Santiago de Compostela, Spain
| | - Andrés Beiras
- Department of Pathology, Institute of Biomedical Research (IDIS-SERGAS), Santiago de Compostela, Spain
| | - Luisa María Seoane
- Department of Endocrine Pathophysiology, Institute of Biomedical Research (IDIS-SERGAS), Santiago de Compostela, Spain
| | - Pamela Lear
- Department of Pharmacology, Oxford University, UK
| | | | | | | | | | - Oreste Gualillo
- Department of Neuroendocrine Interactions in Rheumatic and Inflammatory Diseases, Institute of Biomedical Research (IDIS-SERGAS), Santiago de Compostela, Spain
| | - Valentina Parra
- Department of Internal Medicine (Cardiology) and Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Joseph A Hill
- Department of Internal Medicine (Cardiology) and Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Beverly Rothermel
- Department of Internal Medicine (Cardiology) and Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - José Ramón González-Juanatey
- Department of Cellular and Molecular Cardiology, Institute of Biomedical Research (IDIS-SERGAS), Santiago de Compostela, Spain
| | - Francisca Lago
- Department of Cellular and Molecular Cardiology, Institute of Biomedical Research (IDIS-SERGAS), Santiago de Compostela, Spain
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Chen YP, Tsai CW, Hsieh DJY, Shen CY, Ho TJ, Padma VV, Kuo WW, Huang CY. Tetramethylpyrazine (TMP) switches energy signalling from the PKCζ-GLUT4-glucose pathway back to the SIRT1-CD36-fatty acid pathway similar to resveratrol to ameliorate cardiac myocyte lipotoxicity. J Funct Foods 2015. [DOI: 10.1016/j.jff.2015.09.062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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Abstract
The genetic basis of type 2 diabetes remains incompletely defined despite the use of multiple genetic strategies. Multiparental populations such as heterogeneous stocks (HS) facilitate gene discovery by allowing fine mapping to only a few megabases, significantly decreasing the number of potential candidate genes compared to traditional mapping strategies. In the present work, we employed expression and sequence analysis in HS rats (Rattus norvegicus) to identify Tpcn2 as a likely causal gene underlying a 3.1-Mb locus for glucose and insulin levels. Global gene expression analysis on liver identified Tpcn2 as the only gene in the region that is differentially expressed between HS rats with glucose intolerance and those with normal glucose regulation. Tpcn2 also maps as a cis-regulating expression QTL and is negatively correlated with fasting glucose levels. We used founder sequence to identify variants within this region and assessed association between 18 variants and diabetic traits by conducting a mixed-model analysis, accounting for the complex family structure of the HS. We found that two variants were significantly associated with fasting glucose levels, including a nonsynonymous coding variant within Tpcn2. Studies in Tpcn2 knockout mice demonstrated a significant decrease in fasting glucose levels and insulin response to a glucose challenge relative to those in wild-type mice. Finally, we identified variants within Tpcn2 that are associated with fasting insulin in humans. These studies indicate that Tpcn2 is a likely causal gene that may play a role in human diabetes and demonstrate the utility of multiparental populations for positionally cloning genes within complex loci.
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Talati M, Hemnes A. Fatty acid metabolism in pulmonary arterial hypertension: role in right ventricular dysfunction and hypertrophy. Pulm Circ 2015; 5:269-78. [PMID: 26064451 DOI: 10.1086/681227] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 12/30/2014] [Indexed: 12/21/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is a complex, multifactorial disease in which an increase in pulmonary vascular resistance leads to increased afterload on the right ventricle (RV), causing right heart failure and death. Our understanding of the pathophysiology of RV dysfunction in PAH is limited but is constantly improving. Increasing evidence suggests that in PAH RV dysfunction is associated with various components of metabolic syndrome, such as insulin resistance, hyperglycemia, and dyslipidemia. The relationship between RV dysfunction and fatty acid/glucose metabolites is multifaceted, and in PAH it is characterized by a shift in utilization of energy sources toward increased glucose utilization and reduced fatty acid consumption. RV dysfunction may be caused by maladaptive fatty acid metabolism resulting from an increase in fatty acid uptake by fatty acid transporter molecule CD36 and an imbalance between glucose and fatty acid oxidation in mitochondria. This leads to lipid accumulation in the form of triglycerides, diacylglycerol, and ceramides in the cytoplasm, hallmarks of lipotoxicity. Current interventions in animal models focus on improving RV dysfunction through altering fatty acid oxidation rates and limiting lipid accumulation, but more specific and effective therapies may be available in the coming years based on current research. In conclusion, a deeper understanding of the complex mechanisms of the metabolic remodeling of the RV will aid in the development of targeted treatments for RV failure in PAH.
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Affiliation(s)
- Megha Talati
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Anna Hemnes
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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29
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Shibayama J, Yuzyuk TN, Cox J, Makaju A, Miller M, Lichter J, Li H, Leavy JD, Franklin S, Zaitsev AV. Metabolic remodeling in moderate synchronous versus dyssynchronous pacing-induced heart failure: integrated metabolomics and proteomics study. PLoS One 2015; 10:e0118974. [PMID: 25790351 PMCID: PMC4366225 DOI: 10.1371/journal.pone.0118974] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 01/08/2015] [Indexed: 01/08/2023] Open
Abstract
Heart failure (HF) is accompanied by complex alterations in myocardial energy metabolism. Up to 40% of HF patients have dyssynchronous ventricular contraction, which is an independent indicator of mortality. We hypothesized that electromechanical dyssynchrony significantly affects metabolic remodeling in the course of HF. We used a canine model of tachypacing-induced HF. Animals were paced at 200 bpm for 6 weeks either in the right atrium (synchronous HF, SHF) or in the right ventricle (dyssynchronous HF, DHF). We collected biopsies from left ventricular apex and performed comprehensive metabolic pathway analysis using multi-platform metabolomics (GC/MS; MS/MS; HPLC) and LC-MS/MS label-free proteomics. We found important differences in metabolic remodeling between SHF and DHF. As compared to Control, ATP, phosphocreatine (PCr), creatine, and PCr/ATP (prognostic indicator of mortality in HF patients) were all significantly reduced in DHF, but not SHF. In addition, the myocardial levels of carnitine (mitochondrial fatty acid carrier) and fatty acids (12:0, 14:0) were significantly reduced in DHF, but not SHF. Carnitine parmitoyltransferase I, a key regulatory enzyme of fatty acid ß-oxidation, was significantly upregulated in SHF but was not different in DHF, as compared to Control. Both SHF and DHF exhibited a reduction, but to a different degree, in creatine and the intermediates of glycolysis and the TCA cycle. In contrast to this, the enzymes of creatine kinase shuttle were upregulated, and the enzymes of glycolysis and the TCA cycle were predominantly upregulated or unchanged in both SHF and DHF. These data suggest a systemic mismatch between substrate supply and demand in pacing-induced HF. The energy deficit observed in DHF, but not in SHF, may be associated with a critical decrease in fatty acid delivery to the ß-oxidation pipeline, primarily due to a reduction in myocardial carnitine content.
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Affiliation(s)
- Junko Shibayama
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah, United States of America
- Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Tatiana N. Yuzyuk
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
- ARUP Laboratories, Salt Lake City, Utah, United States of America
| | - James Cox
- Metabolomics Core Research Facility, University of Utah, Salt Lake City, Utah, United States of America
- Department of Biochemistry, University of Utah, Salt Lake City, Utah, United States of America
| | - Aman Makaju
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah, United States of America
| | - Mickey Miller
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah, United States of America
| | - Justin Lichter
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah, United States of America
- Department of Bioengineering, University of Utah, Salt Lake City, Utah, United States of America
| | - Hui Li
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah, United States of America
| | - Jane D. Leavy
- Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Sarah Franklin
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah, United States of America
- Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
- Department of Biochemistry, University of Utah, Salt Lake City, Utah, United States of America
| | - Alexey V. Zaitsev
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah, United States of America
- Department of Bioengineering, University of Utah, Salt Lake City, Utah, United States of America
- * E-mail:
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30
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Elezaby A, Sverdlov AL, Tu VH, Soni K, Luptak I, Qin F, Liesa M, Shirihai OS, Rimer J, Schaffer JE, Colucci WS, Miller EJ. Mitochondrial remodeling in mice with cardiomyocyte-specific lipid overload. J Mol Cell Cardiol 2015; 79:275-83. [PMID: 25497302 PMCID: PMC4301992 DOI: 10.1016/j.yjmcc.2014.12.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 11/17/2014] [Accepted: 12/01/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND Obesity leads to metabolic heart disease (MHD) that is associated with a pathologic increase in myocardial fatty acid (FA) uptake and impairment of mitochondrial function. The mechanism of mitochondrial dysfunction in MHD, which results in oxidant production and decreased energetics, is poorly understood but may be related to excess FAs. Determining the effects of cardiac FA excess on mitochondria can be hindered by the systemic sequelae of obesity. Mice with cardiomyocyte-specific overexpression of the fatty acid transport protein FATP1 have increased cardiomyocyte FA uptake and develop MHD in the absence of systemic lipotoxicity, obesity or diabetes. We utilized this model to assess 1) the effect of cardiomyocyte lipid accumulation on mitochondrial structure and energetic function and 2) the role of lipid-driven transcriptional regulation, signaling, toxic metabolite accumulation, and mitochondrial oxidative stress in lipid-induced MHD. METHODS Cardiac lipid species, lipid-dependent signaling, and mitochondrial structure/function were examined from FATP1 mice. Cardiac structure and function were assessed in mice overexpressing both FATP1 and mitochondrial-targeted catalase. RESULTS FATP1 hearts exhibited a net increase (+12%) in diacylglycerol, with increases in several very long-chain diacylglycerol species (+160-212%, p<0.001) and no change in ceramide, sphingomyelin, or acylcarnitine content. This was associated with an increase in phosphorylation of PKCα and PKCδ, and a decrease in phosphorylation of AKT and expression of CREB, PGC1α, PPARα and the mitochondrial fusion genes MFN1, MFN2 and OPA1. FATP1 overexpression also led to marked decreases in mitochondrial size (-49%, p<0.01), complex II-driven respiration (-28.6%, p<0.05), activity of isolated complex II (-62%, p=0.05), and expression of complex II subunit B (SDHB) (-60% and -31%, p<0.01) in the absence of change in ATP synthesis. Hydrogen peroxide production was not increased in FATP1 mitochondria, and cardiac hypertrophy and diastolic dysfunction were not attenuated by overexpression of catalase in mitochondria in FATP1 mice. CONCLUSIONS Excessive delivery of FAs to the cardiac myocyte in the absence of systemic disorders leads to activation of lipid-driven signaling and remodeling of mitochondrial structure and function.
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Affiliation(s)
- Aly Elezaby
- Boston University School of Medicine, Whitaker Cardiovascular Institute, Section of Cardiovascular Medicine, Boston, MA 02118, United States
| | - Aaron L Sverdlov
- Boston University School of Medicine, Whitaker Cardiovascular Institute, Section of Cardiovascular Medicine, Boston, MA 02118, United States
| | - Vivian H Tu
- Boston University School of Medicine, Whitaker Cardiovascular Institute, Section of Cardiovascular Medicine, Boston, MA 02118, United States
| | - Kanupriya Soni
- Boston University School of Medicine, Whitaker Cardiovascular Institute, Section of Cardiovascular Medicine, Boston, MA 02118, United States
| | - Ivan Luptak
- Boston University School of Medicine, Whitaker Cardiovascular Institute, Section of Cardiovascular Medicine, Boston, MA 02118, United States
| | - Fuzhong Qin
- Boston University School of Medicine, Whitaker Cardiovascular Institute, Section of Cardiovascular Medicine, Boston, MA 02118, United States
| | - Marc Liesa
- Boston University School of Medicine, Obesity and Nutrition Section, Department of Medicine, Boston, MA 02118, United States
| | - Orian S Shirihai
- Boston University School of Medicine, Obesity and Nutrition Section, Department of Medicine, Boston, MA 02118, United States
| | - Jamie Rimer
- Washington University School of Medicine, Diabetic Cardiovascular Disease Center, St Louis, MO 63110, United States
| | - Jean E Schaffer
- Washington University School of Medicine, Diabetic Cardiovascular Disease Center, St Louis, MO 63110, United States
| | - Wilson S Colucci
- Boston University School of Medicine, Whitaker Cardiovascular Institute, Section of Cardiovascular Medicine, Boston, MA 02118, United States
| | - Edward J Miller
- Boston University School of Medicine, Whitaker Cardiovascular Institute, Section of Cardiovascular Medicine, Boston, MA 02118, United States.
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Ortega A, Roselló-Lletí E, Tarazón E, Molina-Navarro MM, Martínez-Dolz L, González-Juanatey JR, Lago F, Montoro-Mateos JD, Salvador A, Rivera M, Portolés M. Endoplasmic reticulum stress induces different molecular structural alterations in human dilated and ischemic cardiomyopathy. PLoS One 2014; 9:e107635. [PMID: 25226522 PMCID: PMC4166610 DOI: 10.1371/journal.pone.0107635] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 08/20/2014] [Indexed: 12/19/2022] Open
Abstract
Background The endoplasmic reticulum (ER) is a multifunctional organelle responsible for the synthesis and folding of proteins as well as for signalling and calcium storage, that has been linked to the contraction-relaxation process. Perturbations of its homeostasis activate a stress response in diseases such as heart failure (HF). To elucidate the alterations in ER molecular components, we analyze the levels of ER stress and structure proteins in human dilated (DCM) and ischemic (ICM) cardiomyopathies, and its relationship with patient's functional status. Methods and Results We examined 52 explanted human hearts from DCM (n = 21) and ICM (n = 21) subjects and 10 non-failing hearts as controls. Our results showed specific changes in stress (IRE1, p<0.05; p-IRE1, p<0.05) and structural (Reticulon 1, p<0.01) protein levels. The stress proteins GRP78, XBP1 and ATF6 as well as the structural proteins RRBP1, kinectin, and Nogo A and B, were upregulated in both DCM and ICM patients. Immunofluorescence results were concordant with quantified Western blot levels. Moreover, we show a novel relationship between stress and structural proteins. RRBP1, involved in procollagen synthesis and remodeling, was related with left ventricular function. Conclusions In the present study, we report the existence of alterations in ER stress response and shaping proteins. We show a plausible effect of the ER stress on ER structure in a suitable sample of DCM and ICM subjects. Patients with higher values of RRBP1 had worse left ventricular function.
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Affiliation(s)
- Ana Ortega
- Cardiocirculatory Unit, Health Research Institute of La Fe University Hospital, Valencia, Spain
| | - Esther Roselló-Lletí
- Cardiocirculatory Unit, Health Research Institute of La Fe University Hospital, Valencia, Spain
| | - Estefanía Tarazón
- Cardiocirculatory Unit, Health Research Institute of La Fe University Hospital, Valencia, Spain
| | | | - Luis Martínez-Dolz
- Heart Failure and Transplantation Unit, Cardiology Department, La Fe University Hospital, Valencia, Spain
| | - José Ramón González-Juanatey
- Cellular and Molecular Cardiology Research Unit, Department of Cardiology and Institute of Biomedical Research, University Clinical Hospital, Santiago de Compostela, Spain
| | - Francisca Lago
- Cellular and Molecular Cardiology Research Unit, Department of Cardiology and Institute of Biomedical Research, University Clinical Hospital, Santiago de Compostela, Spain
| | | | - Antonio Salvador
- Heart Failure and Transplantation Unit, Cardiology Department, La Fe University Hospital, Valencia, Spain
| | - Miguel Rivera
- Cardiocirculatory Unit, Health Research Institute of La Fe University Hospital, Valencia, Spain
| | - Manuel Portolés
- Cardiocirculatory Unit, Health Research Institute of La Fe University Hospital, Valencia, Spain
- * E-mail:
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Neary MT, Ng KE, Ludtmann MHR, Hall AR, Piotrowska I, Ong SB, Hausenloy DJ, Mohun TJ, Abramov AY, Breckenridge RA. Hypoxia signaling controls postnatal changes in cardiac mitochondrial morphology and function. J Mol Cell Cardiol 2014; 74:340-52. [PMID: 24984146 PMCID: PMC4121533 DOI: 10.1016/j.yjmcc.2014.06.013] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 06/11/2014] [Accepted: 06/17/2014] [Indexed: 12/17/2022]
Abstract
Fetal cardiomyocyte adaptation to low levels of oxygen in utero is incompletely understood, and is of interest as hypoxia tolerance is lost after birth, leading to vulnerability of adult cardiomyocytes. It is known that cardiac mitochondrial morphology, number and function change significantly following birth, although the underlying molecular mechanisms and physiological stimuli are undefined. Here we show that the decrease in cardiomyocyte HIF-signaling in cardiomyocytes immediately after birth acts as a physiological switch driving mitochondrial fusion and increased postnatal mitochondrial biogenesis. We also investigated mechanisms of ATP generation in embryonic cardiac mitochondria. We found that embryonic cardiac cardiomyocytes rely on both glycolysis and the tricarboxylic acid cycle to generate ATP, and that the balance between these two metabolic pathways in the heart is controlled around birth by the reduction in HIF signaling. We therefore propose that the increase in ambient oxygen encountered by the neonate at birth acts as a key physiological stimulus to cardiac mitochondrial adaptation. The reduction in HIF signaling encountered by the heart following birth acts as a physiological switch. Reduced postnatal cardiac HIF signaling affects mitochondrial number, structure and function. Experimental study of mitochondria is prone to artifacts due to the effect of oxygen. Cardiomyocytes employ multiple strategies to function in low oxygen in utero.
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Affiliation(s)
- Marianne T Neary
- MRC National Institute for Medical Research, Mill Hill, London NW7 1AA
| | - Keat-Eng Ng
- MRC National Institute for Medical Research, Mill Hill, London NW7 1AA
| | | | - Andrew R Hall
- The Hatter Cardiovascular Institute, London WC1E 6HX
| | | | - Sang-Bing Ong
- The Hatter Cardiovascular Institute, London WC1E 6HX
| | | | - Timothy J Mohun
- MRC National Institute for Medical Research, Mill Hill, London NW7 1AA
| | | | - Ross A Breckenridge
- MRC National Institute for Medical Research, Mill Hill, London NW7 1AA; UCL Division of Medicine, London WC1E 6JJ
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Feijóo-Bandín S, Rodríguez-Penas D, García-Rúa V, Mosquera-Leal A, Otero MF, Pereira E, Rubio J, Martínez I, Seoane LM, Gualillo O, Calaza M, García-Caballero T, Portolés M, Roselló-Lletí E, Diéguez C, Rivera M, González-Juanatey JR, Lago F. Nesfatin-1 in human and murine cardiomyocytes: synthesis, secretion, and mobilization of GLUT-4. Endocrinology 2013; 154:4757-67. [PMID: 24064358 DOI: 10.1210/en.2013-1497] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Nesfatin-1, a satiety-inducing peptide identified in hypothalamic regions that regulate energy balance, is an integral regulator of energy homeostasis and a putative glucose-dependent insulin coadjuvant. We investigated its production by human cardiomyocytes and its effects on glucose uptake, in the main cardiac glucose transporter GLUT-4 and in intracellular signaling. Quantitative RT-PCR, Western blots, confocal immunofluorescence microscopy, and ELISA of human and murine cardiomyocytes and/or cardiac tissue showed that cardiomyocytes can synthesize and secrete nesfatin-1. Confocal microscopy of cultured cardiomyocytes after GLUT-4 labeling showed that nesfatin-1 mobilizes this glucose transporter to cell peripherals. The rate of 2-deoxy-D-[(3)H]glucose incorporation demonstrated that nesfatin-1 induces glucose uptake by HL-1 cells and cultured cardiomyocytes. Nesfatin-1 induced dose- and time-dependent increases in the phosphorylation of ERK1/2, AKT, and AS160. In murine and human cardiac tissue, nesfatin-1 levels varied with diet and coronary health. In conclusion, human and murine cardiomyocytes can synthesize and secrete nesfatin-1, which is able to induce glucose uptake and the mobilization of the glucose transporter GLUT-4 in these cells. Nesfatin-1 cardiac levels are regulated by diet and coronary health.
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Affiliation(s)
- Sandra Feijóo-Bandín
- Laboratorio 7, Instituto de Investigaciones Sanitarias de Santiago de Compostela, Hospital Clínico Universitario, Travesía Choupana s/n, 15706 Santiago de Compostela, Spain.
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Molina-Navarro MM, Roselló-Lletí E, Tarazón E, Ortega A, Sánchez-Izquierdo D, Lago F, González-Juanatey JR, García-Pavía P, Salvador A, Montero JA, Portolés M, Rivera M. Heart failure entails significant changes in human nucleocytoplasmic transport gene expression. Int J Cardiol 2013; 168:2837-43. [PMID: 23651824 DOI: 10.1016/j.ijcard.2013.03.192] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 03/26/2013] [Accepted: 03/30/2013] [Indexed: 01/04/2023]
Abstract
BACKGROUND Heart failure (HF) induces alterations in nucleocytoplasmic transport, which is essential to the cardiomyocyte biology. The objective of this study was to analyze the changes in gene expression in human HF, particularly focusing on nucleocytoplasmic transport-related genes. METHODS AND RESULTS 29 RNA heart samples from dilated cardiomyopathy (DCM, n = 12) and ischemic cardiomyopathy (ICM, n = 12) patients undergoing heart transplantation and control donors (CNT, n = 5) were extracted to perform a microarray profiling using Affymetrix Human Gene® 1.0 ST arrays. We focused on the study of 5 nucleocytoplasmic transport-related genes, since this functional category has not previously been studied in HF. XPO1, GABPB2, and RANBP17 were upregulated, while KALRN was downregulated in both DCM and ICM, and XPO5 only in DCM. Validation of the results by RT-qPCR increasing the total heart samples up to 41 showed a high degree of consistency with microarray results. Moreover, we observed a strong relationship between the XPO1 mRNA and robust left ventricular function parameters in ICM: left ventricular end-systolic (r = 0.81, p<0.0001) and end-diastolic diameters (r = 0.80, p<0.0001), and ejection fraction (r = -0.57, p<0.05). CONCLUSIONS We show that the expression of nucleocytoplasmic transport-related genes is altered in HF. Furthermore, XPO1 mRNA level is closely related with robust left ventricular function parameters in ICM patients. These changes may help to distinguish DCM and ICM in HF at the level of the transcriptome and provide a base for novel therapeutic approaches.
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Wende AR, Symons JD, Abel ED. Mechanisms of lipotoxicity in the cardiovascular system. Curr Hypertens Rep 2013; 14:517-31. [PMID: 23054891 DOI: 10.1007/s11906-012-0307-2] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Cardiovascular diseases account for approximately one third of all deaths globally. Obese and diabetic patients have a high likelihood of dying from complications associated with cardiovascular dysfunction. Obesity and diabetes increase circulating lipids that upon tissue uptake, may be stored as triglyceride, or may be metabolized in other pathways, leading to the generation of toxic intermediates. Excess lipid utilization or activation of signaling pathways by lipid metabolites may disrupt cellular homeostasis and contribute to cell death, defining the concept of lipotoxicity. Lipotoxicity occurs in multiple organs, including cardiac and vascular tissues, and a number of specific mechanisms have been proposed to explain lipotoxic tissue injury. In addition, recent data suggests that increased tissue lipids may also be protective in certain contexts. This review will highlight recent progress toward elucidating the relationship between nutrient oversupply, lipotoxicity, and cardiovascular dysfunction. The review will focus in two sections on the vasculature and cardiomyocytes respectively.
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Affiliation(s)
- Adam R Wende
- Program in Molecular Medicine, Division of Endocrinology, Metabolism, and Diabetes, University of Utah School of Medicine, Salt Lake City, 84112, USA
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36
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Pérez-Sanz TM, de Luis DA. Fatty Acid Binding Proteins and Cardiovascular Risk. CURRENT CARDIOVASCULAR RISK REPORTS 2012. [DOI: 10.1007/s12170-012-0287-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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