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Lehtonen JM, Forsström S, Bottani E, Viscomi C, Baris OR, Isoniemi H, Höckerstedt K, Österlund P, Hurme M, Jylhävä J, Leppä S, Markkula R, Heliö T, Mombelli G, Uusimaa J, Laaksonen R, Laaksovirta H, Auranen M, Zeviani M, Smeitink J, Wiesner RJ, Nakada K, Isohanni P, Suomalainen A. FGF21 is a biomarker for mitochondrial translation and mtDNA maintenance disorders. Neurology 2016; 87:2290-2299. [PMID: 27794108 DOI: 10.1212/wnl.0000000000003374] [Citation(s) in RCA: 152] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 08/01/2016] [Indexed: 01/06/2023] Open
Abstract
OBJECTIVE To validate new mitochondrial myopathy serum biomarkers for diagnostic use. METHODS We analyzed serum FGF21 (S-FGF21) and GDF15 from patients with (1) mitochondrial diseases and (2) nonmitochondrial disorders partially overlapping with mitochondrial disorder phenotypes. We (3) did a meta-analysis of S-FGF21 in mitochondrial disease and (4) analyzed S-Fgf21 and skeletal muscle Fgf21 expression in 6 mouse models with different muscle-manifesting mitochondrial dysfunctions. RESULTS We report that S-FGF21 consistently increases in primary mitochondrial myopathy, especially in patients with mitochondrial translation defects or mitochondrial DNA (mtDNA) deletions (675 and 347 pg/mL, respectively; controls: 66 pg/mL, p < 0.0001 for both). This is corroborated in mice (mtDNA deletions 1,163 vs 379 pg/mL, p < 0.0001). However, patients and mice with structural respiratory chain subunit or assembly factor defects showed low induction (human 335 pg/mL, p < 0.05; mice 335 pg/mL, not significant). Overall specificities of FGF21 and GDF15 to find patients with mitochondrial myopathy were 89.3% vs 86.4%, and sensitivities 67.3% and 76.0%, respectively. However, GDF15 was increased also in a wide range of nonmitochondrial conditions. CONCLUSIONS S-FGF21 is a specific biomarker for muscle-manifesting defects of mitochondrial translation, including mitochondrial transfer-RNA mutations and primary and secondary mtDNA deletions, the most common causes of mitochondrial disease. However, normal S-FGF21 does not exclude structural respiratory chain complex or assembly factor defects, important to acknowledge in diagnostics. CLASSIFICATION OF EVIDENCE This study provides Class III evidence that elevated S-FGF21 accurately distinguishes patients with mitochondrial myopathies from patients with other conditions, and FGF21 and GDF15 mitochondrial myopathy from other myopathies.
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Affiliation(s)
- Jenni M Lehtonen
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Saara Forsström
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Emanuela Bottani
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Carlo Viscomi
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Olivier R Baris
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Helena Isoniemi
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Krister Höckerstedt
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Pia Österlund
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Mikko Hurme
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Juulia Jylhävä
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Sirpa Leppä
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Ritva Markkula
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Tiina Heliö
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Giuliana Mombelli
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Johanna Uusimaa
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Reijo Laaksonen
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Hannu Laaksovirta
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Mari Auranen
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Massimo Zeviani
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Jan Smeitink
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Rudolf J Wiesner
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Kazuto Nakada
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Pirjo Isohanni
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland
| | - Anu Suomalainen
- From the Research Programs Unit, Molecular Neurology (J.M.L., S.F., H.L., M.A., P.I.), Faculty of Medicine/Clinicum, Oncology (P.O.), and Finland Genome Scale Biology Program (S.L.), University of Helsinki, Finland; Mitochondrial Medicine Group (E.B., C.V., M.Z.), Medical Research Council Mitochondrial Biology Unit, Cambridge, UK; Center for Physiology and Pathophysiology (O.R.B., R.J.W.), Institute of Vegetative Physiology, University of Köln, Germany; Transplantation and Liver Surgery Clinic (H.I., K.H.), Department of Oncology (P.O., S.L.), and Heart and Lung Center, Department of Cardiology (T.H.), Helsinki University Hospital; School of Medicine (M.H., J.J., R.L.), University of Tampere; Anaesthesiology, Intensive Care and Pain Medicine (R.M.), Clinical Neurosciences, Neurology (H.L., M.A., A.S.), and Child Neurology, Children's Hospital (P.I.), University of Helsinki and Helsinki University Hospital, Finland; Dyslipidemia Center (G.M.), Cardiotoracovascular Department, Niguarda Hospital, Milan, Italy; PEDEGO Research Unit (J.U.) and Biocenter Oulu (J.U.), University of Oulu; Finnish Clinical Biobank Tampere (R.L.), Tampere University Hospital, Finland; Nijmegen Centre for Mitochondrial Disorders (J.S.), Radboud University Medical Centre, Nijmegen, the Netherlands; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) (R.J.W.), Köln; Center for Molecular Medicine Cologne (R.J.W.), CMMC, University of Köln, Germany; Faculty of Life and Environmental Sciences (K.N.), University of Tsukuba, Japan; and Medical Research Center Oulu (J.U.), Oulu University Hospital and University of Oulu, Finland.
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