1
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Zanfardino P, Amati A, Doccini S, Cox SN, Tullo A, Longo G, D'Erchia A, Picardi E, Nesti C, Santorelli FM, Petruzzella V. OPA1 mutation affects autophagy and triggers senescence in autosomal dominant optic atrophy plus fibroblasts. Hum Mol Genet 2024; 33:768-786. [PMID: 38280232 DOI: 10.1093/hmg/ddae008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 01/06/2024] [Indexed: 01/29/2024] Open
Abstract
In several cases of mitochondrial diseases, the underlying genetic and bioenergetic causes of reduced oxidative phosphorylation (OxPhos) in mitochondrial dysfunction are well understood. However, there is still limited knowledge about the specific cellular outcomes and factors involved for each gene and mutation, which contributes to the lack of effective treatments for these disorders. This study focused on fibroblasts from a patient with Autosomal Dominant Optic Atrophy (ADOA) plus syndrome harboring a mutation in the Optic Atrophy 1 (OPA1) gene. By combining functional and transcriptomic approaches, we investigated the mitochondrial function and identified cellular phenotypes associated with the disease. Our findings revealed that fibroblasts with the OPA1 mutation exhibited a disrupted mitochondrial network and function, leading to altered mitochondrial dynamics and reduced autophagic response. Additionally, we observed a premature senescence phenotype in these cells, suggesting a previously unexplored role of the OPA1 gene in inducing senescence in ADOA plus patients. This study provides novel insights into the mechanisms underlying mitochondrial dysfunction in ADOA plus and highlights the potential importance of senescence in disease progression.
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Affiliation(s)
- Paola Zanfardino
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of study of Bari Aldo Moro, Piazza G. Cesare, 11, 70124 Bari, Italy
| | - Alessandro Amati
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of study of Bari Aldo Moro, Piazza G. Cesare, 11, 70124 Bari, Italy
| | - Stefano Doccini
- Molecular Medicine for Neurodegenerative and Neuromuscular Diseases Unit, IRCCS Stella Maris Foundation, Viale del Tirreno, 56128 Calambrone, Pisa, Italy
| | - Sharon N Cox
- Department of Biosciences, Biotechnology, and Biopharmaceutics, University of study of Bari Aldo Moro, via Orabona 4, 70125, Bari, Italy
| | - Apollonia Tullo
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies (IBIOM), National Research Council, Via G. Amendola 122/O, 70126 Bari, Italy
| | - Giovanna Longo
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of study of Bari Aldo Moro, Piazza G. Cesare, 11, 70124 Bari, Italy
| | - Annamaria D'Erchia
- Department of Biosciences, Biotechnology, and Biopharmaceutics, University of study of Bari Aldo Moro, via Orabona 4, 70125, Bari, Italy
| | - Ernesto Picardi
- Department of Biosciences, Biotechnology, and Biopharmaceutics, University of study of Bari Aldo Moro, via Orabona 4, 70125, Bari, Italy
| | - Claudia Nesti
- Molecular Medicine for Neurodegenerative and Neuromuscular Diseases Unit, IRCCS Stella Maris Foundation, Viale del Tirreno, 56128 Calambrone, Pisa, Italy
| | - Filippo M Santorelli
- Molecular Medicine for Neurodegenerative and Neuromuscular Diseases Unit, IRCCS Stella Maris Foundation, Viale del Tirreno, 56128 Calambrone, Pisa, Italy
| | - Vittoria Petruzzella
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of study of Bari Aldo Moro, Piazza G. Cesare, 11, 70124 Bari, Italy
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Milella G, Amati A, Lastella P, Zanfardino P, Petruzzella V, Zoccolella S. A novel mutation in the LRSAM1 gene in a family with early onset autosomal dominant Charcot-Marie-Tooth type 2P. Clin Neurol Neurosurg 2024; 237:108158. [PMID: 38330802 DOI: 10.1016/j.clineuro.2024.108158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/28/2024] [Accepted: 02/01/2024] [Indexed: 02/10/2024]
Abstract
Charcot-Marie-Tooth disease type 2P (CMT2P; MIM #614436) is a specific type of axonal neuropathy caused by mutations in the LRSAM1 gene, which is a RING-type E3 ubiquitin ligase. CMT2P can be inherited in two ways: as an autosomal dominant or autosomal recessive trait. In this report, we describe the clinical characteristics of a family with axonal sensory-motor neuropathy caused by a new variant of the LSRAM1 gene, which is associated with early-onset autosomal dominant CMT2P.
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Affiliation(s)
- Giammarco Milella
- Department of Neurology and Stroke Unit "F.M. Puca", AOU Consorziale Policlinico, Bari, Italy
| | - Alessandro Amati
- Department of Translational Biomedicine and Neurosciences (DiBraiN), University of Bari Aldo Moro, Bari, Italy
| | - Patrizia Lastella
- Rare Disease Center, Internal Medicine Unit "C. Frugoni", AOU Policlinico di Bari, 70124 Bari, Italy
| | - Paola Zanfardino
- Department of Translational Biomedicine and Neurosciences (DiBraiN), University of Bari Aldo Moro, Bari, Italy
| | - Vittoria Petruzzella
- Department of Translational Biomedicine and Neurosciences (DiBraiN), University of Bari Aldo Moro, Bari, Italy.
| | - Stefano Zoccolella
- Neurology Unit, ASL Bari, San Paolo Hospital, Bari, Italy; Center for Neurodegenerative Diseases and the Aging Brain at Pia Fondazione "G. Panico", University of Bari Aldo Moro, Tricase (Lecce), Italy.
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3
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Fiorini C, Ormanbekova D, Palombo F, Carbonelli M, Amore G, Romagnoli M, d’Agati P, Valentino ML, Barboni P, Cascavilla ML, De Negri A, Sadun F, Carta A, Testa F, Petruzzella V, Guerriero S, Bianchi Marzoli S, Carelli V, La Morgia C, Caporali L. The Italian reappraisal of the most frequent genetic defects in hereditary optic neuropathies and the global top 10. Brain 2023; 146:e67-e70. [PMID: 36913248 PMCID: PMC10473554 DOI: 10.1093/brain/awad080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 02/20/2023] [Indexed: 03/14/2023] Open
Affiliation(s)
- Claudio Fiorini
- IRCCS Istituto di Scienze Neurologiche di Bologna, Programma di Neurogenetica, 40139 Bologna, Italy
| | - Danara Ormanbekova
- IRCCS Istituto di Scienze Neurologiche di Bologna, Programma di Neurogenetica, 40139 Bologna, Italy
| | - Flavia Palombo
- IRCCS Istituto di Scienze Neurologiche di Bologna, Programma di Neurogenetica, 40139 Bologna, Italy
| | - Michele Carbonelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40139 Bologna, Italy
| | - Giulia Amore
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40139 Bologna, Italy
| | - Martina Romagnoli
- IRCCS Istituto di Scienze Neurologiche di Bologna, Programma di Neurogenetica, 40139 Bologna, Italy
| | - Pietro d’Agati
- IRCCS Istituto di Scienze Neurologiche di Bologna, Programma di Neurogenetica, 40139 Bologna, Italy
| | - Maria Lucia Valentino
- IRCCS Istituto di Scienze Neurologiche di Bologna, Programma di Neurogenetica, 40139 Bologna, Italy
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40139 Bologna, Italy
| | - Piero Barboni
- Department of Ophthalmology, University Vita-Salute, IRCCS Ospedale San Raffaele, 20132 Milan, Italy
| | - Maria Lucia Cascavilla
- Department of Ophthalmology, University Vita-Salute, IRCCS Ospedale San Raffaele, 20132 Milan, Italy
| | | | | | - Arturo Carta
- Ophthalmology Unit, University Hospital of Parma, 43126 Parma, Italy
| | - Francesco Testa
- Eye Clinic, Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania Luigi Vanvitelli, 80131 Naples, Italy
| | - Vittoria Petruzzella
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Bari Aldo Moro, 70121 Bari, Italy
| | - Silvana Guerriero
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Bari Aldo Moro, 70121 Bari, Italy
| | - Stefania Bianchi Marzoli
- Neuroophthalmology Service and Ocular Electrophysiology Laboratory, Department of Ophthalmology, IRCCS Istituto Auxologico Italiano, 20122 Milan, Italy
| | - Valerio Carelli
- IRCCS Istituto di Scienze Neurologiche di Bologna, Programma di Neurogenetica, 40139 Bologna, Italy
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40139 Bologna, Italy
| | - Chiara La Morgia
- IRCCS Istituto di Scienze Neurologiche di Bologna, Programma di Neurogenetica, 40139 Bologna, Italy
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40139 Bologna, Italy
| | - Leonardo Caporali
- IRCCS Istituto di Scienze Neurologiche di Bologna, Programma di Neurogenetica, 40139 Bologna, Italy
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Rocchetti MT, Bizzoca D, Moretti L, Ragni E, Moretti FL, Vicenti G, Solarino G, Rizzello A, Petruzzella V, Palese LL, Scacco S, Banfi G, Moretti B, Gnoni A. A Gel-Based Proteomic Analysis Reveals Synovial α-Enolase and Fibrinogen β-Chain Dysregulation in Knee Osteoarthritis: A Controlled Trial. J Pers Med 2023; 13:916. [PMID: 37373906 PMCID: PMC10305339 DOI: 10.3390/jpm13060916] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/28/2023] [Accepted: 05/28/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND The identification of synovial fluid (SF) biomarkers that could anticipate the diagnosis of osteoarthritis (OA) is gaining increasing importance in orthopaedic clinical practice. This controlled trial aims to assess the differences between the SF proteome of patients affected by severe OA undergoing Total Knee Replacement (TKR) compared to control subjects (i.e., subjects younger than 35, undergoing knee arthroscopy for acute meniscus injury). METHODS The synovial samples were collected from patients with Kellgren Lawrence grade 3 and 4 knee osteoarthritis undergoing THR (study group) and young patients with meniscal tears and no OA signs undergoing arthroscopic surgery (control group). The samples were processed and analyzed following the protocol defined in our previous study. All of the patients underwent clinical evaluation using the International Knee Documentation Committee (IKDC) subjective knee evaluation (main outcome), Knee Society Clinical Rating System (KSS), Knee injury and Osteoarthritis Outcome Score (KOOS), and Visual Analogue Scale (VAS) for pain. The drugs' assumptions and comorbidities were recorded. All patients underwent preoperative serial blood tests, including complete blood count and C-Reactive Protein (CRP). RESULTS The synovial samples' analysis showed a significantly different fibrinogen beta chain (FBG) and alpha-enolase 1 (ENO1) concentration in OA compared to the control samples. A significant correlation between clinical scores, FBG, and ENO1 concentration was observed in osteoarthritic patients. CONCLUSIONS Synovial fluid FBG and ENO1 concentrations are significantly different in patients affected by knee OA compared with non-OA subjects.
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Affiliation(s)
- Maria Teresa Rocchetti
- Department of Clinical and Experimental Medicine, University of Foggia, Via Pinto 1, 71122 Foggia, Italy
| | - Davide Bizzoca
- Orthopaedics Unit-UOSD Vertebral Surgery, DAI Neuroscience, Sense Organs and Locomotor System, AOU Consorziale Policlinico, 70124 Bari, Italy
- PhD Course in Public Health, Clinical Medicine and Oncology, DiMePre-J, University of Bari "Aldo Moro", Piazza Giulio Cesare 11, 70124 Bari, Italy
| | - Lorenzo Moretti
- Orthopaedics Unit-UOSD Vertebral Surgery, DAI Neuroscience, Sense Organs and Locomotor System, AOU Consorziale Policlinico, 70124 Bari, Italy
| | - Enrico Ragni
- IRCCS Istituto Ortopedico Galeazzi, Laboratorio di Biotecnologie Applicate all'Ortopedia, Via R. Galeazzi 4, 20161 Milano, Italy
| | - Francesco Luca Moretti
- IRCCS Istituto Ortopedico Galeazzi, Laboratorio di Biotecnologie Applicate all'Ortopedia, Via R. Galeazzi 4, 20161 Milano, Italy
- National Centre for Chemicals, Cosmetic Products and Consumer Protection, National Institute of Health, 00161 Rome, Italy
| | - Giovanni Vicenti
- Orthopaedics Unit-UOSD Vertebral Surgery, DAI Neuroscience, Sense Organs and Locomotor System, AOU Consorziale Policlinico, 70124 Bari, Italy
| | - Giuseppe Solarino
- Orthopaedics Unit-UOSD Vertebral Surgery, DAI Neuroscience, Sense Organs and Locomotor System, AOU Consorziale Policlinico, 70124 Bari, Italy
| | - Alessandro Rizzello
- Clinical Biochemistry, DiBraiN, School of Medicine, University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Vittoria Petruzzella
- Clinical Biochemistry, DiBraiN, School of Medicine, University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Luigi Leonardo Palese
- Clinical Biochemistry, DiBraiN, School of Medicine, University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Salvatore Scacco
- Clinical Biochemistry, DiBraiN, School of Medicine, University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Giuseppe Banfi
- IRCCS Galeazzi-Sant'Ambrogio, Via Cristina Belgioioso 173, 20157 Milano, Italy
- Faculty of Medicine, Università Vita-Salute San Raffaele, Via Olgettina 58, 20132 Milano, Italy
| | - Biagio Moretti
- Orthopaedics Unit-UOSD Vertebral Surgery, DAI Neuroscience, Sense Organs and Locomotor System, AOU Consorziale Policlinico, 70124 Bari, Italy
| | - Antonio Gnoni
- Clinical Biochemistry, DiBraiN, School of Medicine, University of Bari "Aldo Moro", 70124 Bari, Italy
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5
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Zanfardino P, Amati A, Petracca EA, Santorelli FM, Petruzzella V. Torin1 restores proliferation rate in Charcot-Marie-Tooth disease type 2A cells harbouring MFN2 (mitofusin 2) mutation. Acta Myol 2023; 41:201-206. [PMID: 36793649 PMCID: PMC9896598 DOI: 10.36185/2532-1900-085] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 12/30/2022] [Indexed: 02/17/2023]
Abstract
Objective Mitofusin 2 (MFN2) is a mitochondrial outer membrane protein that serves primarily as a mitochondrial fusion protein but has additional functions including the tethering of mitochondrial-endoplasmic reticulum membranes, movement of mitochondria along axons, and control of the quality of mitochondria. Intriguingly, MFN2 has been referred to play a role in regulating cell proliferation in several cell types such that it acts as a tumour suppressor role in some forms of cancer. Previously, we found that fibroblasts derived from a Charcot-Marie-Tooth disease type 2A (CMT2A) patient with a mutation in the GTPase domain of MFN2 exhibit increased proliferation and decreased autophagy. Methods Primary fibroblasts from a young patient affected by CMT2A harbouring c.650G > T/p.Cys217Phe mutation in the MFN2 gene were evaluated versus a healthy control to measure the proliferation rate by growth curves analysis and to assess the phosphorylation of protein kinase B (AKT) at Ser473 in response to different doses of torin1, a selective catalytic ATP-competitive mammalian target of rapamycin complex (mTOR) inhibitor, by immunoblot analysis. Results Herein, we demonstrated that the mammalian target of rapamycin complex 2 (mTORC2) is highly activated in the CMT2AMFN2 fibroblasts to promote cell growth via the AKT(Ser473) phosphorylation-mediated signalling. We report that torin1 restores CMT2AMFN2 fibroblasts' growth rate in a dose-dependent manner by decreasing AKT(Ser473) phosphorylation. Conclusions Overall, our study provides evidence for mTORC2, as a novel molecular target that lies upstream of AKT to restore the cell proliferation rate in CMT2A fibroblasts.
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Affiliation(s)
- Paola Zanfardino
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Bari "Aldo Moro", Bari, Italy
| | - Alessandro Amati
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Bari "Aldo Moro", Bari, Italy
| | - Easter Anna Petracca
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Bari "Aldo Moro", Bari, Italy
| | - Filippo M Santorelli
- Molecular Medicine for Neurodegenerative and Neuromuscular Diseases Unit, IRCCS Fondazione Stella Maris, Pisa, Italy
| | - Vittoria Petruzzella
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Bari "Aldo Moro", Bari, Italy
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6
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Zanfardino P, Longo G, Amati A, Morani F, Picardi E, Girolamo F, Pafundi M, Cox SN, Manzari C, Tullo A, Doccini S, Santorelli FM, Petruzzella V. Mitofusin 2 mutation drives cell proliferation in Charcot-Marie-Tooth 2A fibroblasts. Hum Mol Genet 2023; 32:333-350. [PMID: 35994048 DOI: 10.1093/hmg/ddac201] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 08/12/2022] [Accepted: 08/16/2022] [Indexed: 01/20/2023] Open
Abstract
Dominant mutations in ubiquitously expressed mitofusin 2 gene (MFN2) cause Charcot-Marie-Tooth type 2A (CMT2A; OMIM 609260), an inherited sensory-motor neuropathy that affects peripheral nerve axons. Mitofusin 2 protein has been found to take part in mitochondrial fusion, mitochondria-endoplasmic reticulum tethering, mitochondrial trafficking along axons, mitochondrial quality control and various types of cancer, in which MFN2 has been indicated as a tumor suppressor gene. Discordant data on the mitochondrial altered phenotypes in patient-derived fibroblasts harboring MFN2 mutations and in animal models have been reported. We addressed some of these issues by focusing on mitochondria behavior during autophagy and mitophagy in fibroblasts derived from a CMT2AMFN2 patient with an MFN2650G > T/C217F mutation in the GTPase domain. This study investigated mitochondrial dynamics, respiratory capacity and autophagy/mitophagy, to tackle the multifaceted MFN2 contribution to CMT2A pathogenesis. We found that MFN2 mutated fibroblasts showed impairment of mitochondrial morphology, bioenergetics capacity, and impairment of the early stages of autophagy, but not mitophagy. Unexpectedly, transcriptomic analysis of mutated fibroblasts highlighted marked differentially expressed pathways related to cell population proliferation and extracellular matrix organization. We consistently found the activation of mTORC2/AKT signaling and accelerated proliferation in the CMT2AMFN2 fibroblasts. In conclusion, our evidence indicates that MFN2 mutation can positively drive cell proliferation in CMT2AMFN2 fibroblasts.
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Affiliation(s)
- Paola Zanfardino
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Giovanna Longo
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Alessandro Amati
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Federica Morani
- Department of Biology, University of Pisa, 56126 Pisa, Italy
| | - Ernesto Picardi
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, 70125 Bari, Italy.,Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council, 70125 Bari, Italy
| | - Francesco Girolamo
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Mariella Pafundi
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Sharon N Cox
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, 70125 Bari, Italy
| | - Caterina Manzari
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, 70125 Bari, Italy
| | - Apollonia Tullo
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council, 70125 Bari, Italy
| | - Stefano Doccini
- Molecular Medicine for Neurodegenerative and Neuromuscular Diseases Unit, IRCCS Fondazione Stella Maris, 56128 Pisa, Italy
| | - Filippo M Santorelli
- Molecular Medicine for Neurodegenerative and Neuromuscular Diseases Unit, IRCCS Fondazione Stella Maris, 56128 Pisa, Italy
| | - Vittoria Petruzzella
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, 70124 Bari, Italy
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7
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Maria Turco E, Maria Giada Giovenale A, Rotundo G, Mazzoni M, Zanfardino P, Frezza K, Torrente I, Mary Carletti R, Damiani D, Santorelli FM, Luigi Vescovi A, Petruzzella V, Rosati J. Generation and characterization of CSSi016-A (9938) human pluripotent stem cell line carrying two biallelic variants in MTMR5/SBF1 gene resulting in a case of severe CMT4B3. Stem Cell Res 2022; 65:102946. [PMID: 36272304 DOI: 10.1016/j.scr.2022.102946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 10/12/2022] [Accepted: 10/16/2022] [Indexed: 11/19/2022] Open
Abstract
Charcot-Marie-Tooth type 4B3 (CMT4B3) is a rare subtype of hereditary neuropathy associated with variants in the MTMR5/SBF1 gene. Herein, we report the generation and characterization of a hiPSC line from a 12-year-old Italian girl with early onset severe polyneuropathy with motor and axonal involvement, harboring biallelic variants in the MTMR5/SBF1 gene. Fibroblasts were reprogrammed using non-integrating episomal plasmids, and iPSCs successfully passed the stemness and pluripotency tests. Patient-specific hiPSCs were produced to obtain a disease model for the study of this rare condition.
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Affiliation(s)
- Elisa Maria Turco
- Cellular Reprogramming Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, Viale dei Cappuccini, 71013 San Giovanni Rotondo (FG), Italy
| | - Angela Maria Giada Giovenale
- Cellular Reprogramming Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, Viale dei Cappuccini, 71013 San Giovanni Rotondo (FG), Italy; Department of Biotechnology and Biosciences, University of Milano-Bicocca, P.zza della Scienza,2, 20126 Milan, Italy
| | - Giovannina Rotundo
- Cellular Reprogramming Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, Viale dei Cappuccini, 71013 San Giovanni Rotondo (FG), Italy
| | - Martina Mazzoni
- Cellular Reprogramming Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, Viale dei Cappuccini, 71013 San Giovanni Rotondo (FG), Italy
| | - Paola Zanfardino
- Department of Translational Biomedicine and Neurosciences, University of Bari Aldo Moro, Piazza G. Cesare, 11, 70124 Bari, Italy
| | - Katia Frezza
- Medical Genetics Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, Viale dei Cappuccini, 71013 San Giovanni Rotondo, Italy
| | - Isabella Torrente
- Medical Genetics Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, Viale dei Cappuccini, 71013 San Giovanni Rotondo, Italy
| | - Rose Mary Carletti
- Cellular Reprogramming Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, Viale dei Cappuccini, 71013 San Giovanni Rotondo (FG), Italy
| | | | | | - Angelo Luigi Vescovi
- Cellular Reprogramming Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, Viale dei Cappuccini, 71013 San Giovanni Rotondo (FG), Italy; Department of Biotechnology and Biosciences, University of Milano-Bicocca, P.zza della Scienza,2, 20126 Milan, Italy
| | - Vittoria Petruzzella
- Department of Translational Biomedicine and Neurosciences, University of Bari Aldo Moro, Piazza G. Cesare, 11, 70124 Bari, Italy.
| | - Jessica Rosati
- Cellular Reprogramming Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, Viale dei Cappuccini, 71013 San Giovanni Rotondo (FG), Italy.
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8
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Amendolare A, Marzano F, Petruzzella V, Vacca RA, Guerrini L, Pesole G, Sbisà E, Tullo A. The Underestimated Role of the p53 Pathway in Renal Cancer. Cancers (Basel) 2022; 14:cancers14235733. [PMID: 36497215 PMCID: PMC9736171 DOI: 10.3390/cancers14235733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/10/2022] [Accepted: 11/18/2022] [Indexed: 11/24/2022] Open
Abstract
The TP53 tumor suppressor gene is known as the guardian of the genome, playing a pivotal role in controlling genome integrity, and its functions are lost in more than 50% of human tumors due to somatic mutations. This percentage rises to 90% if mutations and alterations in the genes that code for regulators of p53 stability and activity are taken into account. Renal cell carcinoma (RCC) is a clear example of cancer that despite having a wild-type p53 shows poor prognosis because of the high rate of resistance to radiotherapy or chemotherapy, which leads to recurrence, metastasis and death. Remarkably, the fact that p53 is poorly mutated does not mean that it is functionally active, and increasing experimental evidences have demonstrated this. Therefore, RCC represents an extraordinary example of the importance of p53 pathway alterations in therapy resistance. The search for novel molecular biomarkers involved in the pathways that regulate altered p53 in RCC is mandatory for improving early diagnosis, evaluating the prognosis and developing novel potential therapeutic targets for better RCC treatment.
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Affiliation(s)
- Alessandra Amendolare
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, 70121 Bari, Italy
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council—CNR, 70126 Bari, Italy
| | - Flaviana Marzano
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council—CNR, 70126 Bari, Italy
| | - Vittoria Petruzzella
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Bari Aldo Moro, 70121 Bari, Italy
| | - Rosa Anna Vacca
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council—CNR, 70126 Bari, Italy
| | - Luisa Guerrini
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Graziano Pesole
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, 70121 Bari, Italy
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council—CNR, 70126 Bari, Italy
| | - Elisabetta Sbisà
- Institute of Biomedical Technologies, National Research Council—CNR, 70126 Bari, Italy
| | - Apollonia Tullo
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council—CNR, 70126 Bari, Italy
- Correspondence: ; Tel.: +39-0805929672
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9
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Zanfardino P, Doccini S, Santorelli FM, Petruzzella V. Tackling Dysfunction of Mitochondrial Bioenergetics in the Brain. Int J Mol Sci 2021; 22:8325. [PMID: 34361091 PMCID: PMC8348117 DOI: 10.3390/ijms22158325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/29/2021] [Accepted: 07/30/2021] [Indexed: 12/15/2022] Open
Abstract
Oxidative phosphorylation (OxPhos) is the basic function of mitochondria, although the landscape of mitochondrial functions is continuously growing to include more aspects of cellular homeostasis. Thanks to the application of -omics technologies to the study of the OxPhos system, novel features emerge from the cataloging of novel proteins as mitochondrial thus adding details to the mitochondrial proteome and defining novel metabolic cellular interrelations, especially in the human brain. We focussed on the diversity of bioenergetics demand and different aspects of mitochondrial structure, functions, and dysfunction in the brain. Definition such as 'mitoexome', 'mitoproteome' and 'mitointeractome' have entered the field of 'mitochondrial medicine'. In this context, we reviewed several genetic defects that hamper the last step of aerobic metabolism, mostly involving the nervous tissue as one of the most prominent energy-dependent tissues and, as consequence, as a primary target of mitochondrial dysfunction. The dual genetic origin of the OxPhos complexes is one of the reasons for the complexity of the genotype-phenotype correlation when facing human diseases associated with mitochondrial defects. Such complexity clinically manifests with extremely heterogeneous symptoms, ranging from organ-specific to multisystemic dysfunction with different clinical courses. Finally, we briefly discuss the future directions of the multi-omics study of human brain disorders.
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Affiliation(s)
- Paola Zanfardino
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, 70124 Bari, Italy;
| | - Stefano Doccini
- IRCCS Fondazione Stella Maris, Calambrone, 56128 Pisa, Italy;
| | | | - Vittoria Petruzzella
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, 70124 Bari, Italy;
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Berti B, Longo G, Mari F, Doccini S, Piccolo I, Donati MA, Moro F, Guerrini R, Santorelli FM, Petruzzella V. Bi-allelic variants in MTMR5/SBF1 cause Charcot-Marie-Tooth type 4B3 featuring mitochondrial dysfunction. BMC Med Genomics 2021; 14:157. [PMID: 34118926 PMCID: PMC8199524 DOI: 10.1186/s12920-021-01001-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Accepted: 06/06/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Charcot-Marie-Tooth disease (CMT) type 4B3 (CMT4B3) is a rare form of genetic neuropathy associated with variants in the MTMR5/SBF1 gene. MTMR5/SBF1 is a pseudophosphatase predicted to regulate endo-lysosomal trafficking in tandem with other MTMRs. Although almost ubiquitously expressed, pathogenic variants primarily impact on the peripheral nervous system, corroborating the involvement of MTMR5/SBF1 and its molecular partners in Schwann cells-mediated myelinization. CASE PRESENTATION We report a case of severe CMT4B3 characterized by early-onset motor and axonal polyneuropathy in an Italian child in absence of any evidence of brain and spine MRI abnormalities or intellectual disability and with a biochemical profile suggestive of mitochondrial disease. Using an integrated approach combining both NGS gene panels and WES analysis, we identified two novel compound heterozygous missense variants in MTMR5/SBF1 gene, p.R763H (c.2291G > A) and p.G1064E (c.3194G > A). Studies in muscle identified partial defects of oxidative metabolism. CONCLUSION We describe the first case of an early onset severe polyneuropathy with motor and axonal involvement, due to recessive variants in the MTMR5/SBF1 gene, with no evidence of brain and spine MRI abnormalities, intellectual disability, no clinical and neurophysiological evidences of distal sensory impairment, and rapid neuromuscular deterioration. This report suggests that MTMR5/SBF1 should be considered in cases of infantile-onset CMT with secondary mitochondrial dysfunction.
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Affiliation(s)
- Beatrice Berti
- Pediatric Neurology and Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli - IRCCS, Rome, Italy
| | - Giovanna Longo
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, Piazza G. Cesare, 11, 70124, Bari, Italy
| | - Francesco Mari
- Child Neurology Unit, Meyer Children's Hospital, Florence, Italy
| | - Stefano Doccini
- IRCCS Fondazione Stella Maris, via dei Giacinti 2, Calambrone, 56128, Pisa, Italy
| | - Ilaria Piccolo
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, Piazza G. Cesare, 11, 70124, Bari, Italy
| | | | - Francesca Moro
- IRCCS Fondazione Stella Maris, via dei Giacinti 2, Calambrone, 56128, Pisa, Italy
| | - Renzo Guerrini
- Child Neurology Unit, Meyer Children's Hospital, Florence, Italy
| | - Filippo M Santorelli
- IRCCS Fondazione Stella Maris, via dei Giacinti 2, Calambrone, 56128, Pisa, Italy.
| | - Vittoria Petruzzella
- Department of Medical Basic Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, Piazza G. Cesare, 11, 70124, Bari, Italy.
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11
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Reyes A, Favia P, Vidoni S, Petruzzella V, Zeviani M. RCC1L (WBSCR16) isoforms coordinate mitochondrial ribosome assembly through their interaction with GTPases. PLoS Genet 2020; 16:e1008923. [PMID: 32735630 PMCID: PMC7423155 DOI: 10.1371/journal.pgen.1008923] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 08/12/2020] [Accepted: 06/10/2020] [Indexed: 12/12/2022] Open
Abstract
Mitochondrial translation defects can be due to mutations affecting mitochondrial- or nuclear-encoded components. The number of known nuclear genes involved in mitochondrial translation has significantly increased in the past years. RCC1L (WBSCR16), a putative GDP/GTP exchange factor, has recently been described to interact with the mitochondrial large ribosomal subunit. In humans, three different RCC1L isoforms have been identified that originate from alternative splicing but share the same N-terminus, RCC1LV1, RCC1LV2 and RCC1LV3. All three isoforms were exclusively localized to mitochondria, interacted with its inner membrane and could associate with homopolymeric oligos to different extent. Mitochondrial immunoprecipitation experiments showed that RCC1LV1 and RCC1LV3 associated with the mitochondrial large and small ribosomal subunit, respectively, while no significant association was observed for RCC1LV2. Overexpression and silencing of RCC1LV1 or RCC1LV3 led to mitoribosome biogenesis defects that resulted in decreased translation. Indeed, significant changes in steady-state levels and distribution on isokinetic sucrose gradients were detected not only for mitoribosome proteins but also for GTPases, (GTPBP10, ERAL1 and C4orf14), and pseudouridylation proteins, (TRUB2, RPUSD3 and RPUSD4). All in all, our data suggest that RCC1L is essential for mitochondrial function and that the coordination of at least two isoforms is essential for proper ribosomal assembly.
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Affiliation(s)
- Aurelio Reyes
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, United Kingdom
- * E-mail:
| | - Paola Favia
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, United Kingdom
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari, Italy
| | - Sara Vidoni
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, United Kingdom
| | - Vittoria Petruzzella
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari, Italy
| | - Massimo Zeviani
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, United Kingdom
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Guerriero S, D'Oria F, Rossetti G, Favale RA, Zoccolella S, Alessio G, Petruzzella V. CMT2A Harboring Mitofusin 2 Mutation with Optic Nerve Atrophy and Normal Visual Acuity. Int Med Case Rep J 2020; 13:41-45. [PMID: 32110117 PMCID: PMC7039061 DOI: 10.2147/imcrj.s237620] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 01/17/2020] [Indexed: 01/20/2023] Open
Abstract
Charcot-Marie-Tooth (CMT) constitutes a group of heterogeneous hereditary motor and sensor neuropathies. Mutations in mitofusin-2 (MFN2) cause CMT type 2A by altering mitochondrial fusion and trafficking along with the axonal microtubule system. In literature patients presenting with CMT2A are reported as having a subacute onset of optic atrophy associated with central scotoma and color vision defects. We report on the clinical and genetic findings in a 40 years-old Caucasian woman presenting with CMT type 2A and MFN2 mutation (c.2258duplT/p.Leu753fs) who presented bilateral progressive optic atrophy with bilateral severe concentric narrowing of the visual field but normal visual acuity and color vision. This is the first report that describes such phenotypical manifestation of an MFN2 mutation suggesting that the molecular mechanisms underlying the mitofusin-2 function alteration at optic nerve need to be investigated further.
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Affiliation(s)
- Silvana Guerriero
- Department of Medical Science, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - Francesco D'Oria
- Department of Medical Science, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - Giacomo Rossetti
- Department of Molecular Biology, University of Geneva, Geneva, Switzerland
| | - Rosa Anna Favale
- Department of Medical Science, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - Stefano Zoccolella
- Department of Medical Science, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - Giovanni Alessio
- Department of Medical Science, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - Vittoria Petruzzella
- Department of Medical Science, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
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Caratozzolo MF, Marzano F, Abbrescia DI, Mastropasqua F, Petruzzella V, Calabrò V, Pesole G, Sbisà E, Guerrini L, Tullo A. TRIM8 Blunts the Pro-proliferative Action of ΔNp63α in a p53 Wild-Type Background. Front Oncol 2019; 9:1154. [PMID: 31781486 PMCID: PMC6856647 DOI: 10.3389/fonc.2019.01154] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 10/16/2019] [Indexed: 01/01/2023] Open
Abstract
The p53 gene family network plays a pivotal role in the control of many biological processes and therefore the right balance between the pro-apoptotic and pro-survival isoforms is key to maintain cellular homeostasis. The stability of the p53 tumor suppressor protein and that of oncogenic ΔNp63α, is crucial to control cell proliferation. The aberrant expression of p53 tumor suppressor protein and oncogenic ΔNp63α contributes to tumorigenesis and significantly affects anticancer drug response. Recently, we demonstrated that TRIM8 increases p53 stability, potentiating its tumor suppressor activity. In this paper, we show that TRIM8 simultaneously reduces the level of the pro-proliferative ΔNp63α protein, in both a proteasomal and caspase-1 dependent way, thereby playing a critical role in the cellular response to DNA damaging agents. Moreover, we provided evidence that ΔNp63α in turn, suppresses TRIM8 gene expression by preventing p53-mediated transactivation of TRIM8, therefore suggesting the existence of a negative feedback loop. These findings indicate that TRIM8 exerts its anticancer power through a joint action that provides on one hand, the activation of the p53 tumor suppressor role, and on the other the quenching of the oncogenic ΔNp63α protein activity. The enhancement of TRIM8 activity may offer therapeutic benefits and improve the management of chemoresistant tumors.
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Affiliation(s)
- Mariano Francesco Caratozzolo
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council (CNR), Bari, Italy
| | - Flaviana Marzano
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council (CNR), Bari, Italy
| | | | - Francesca Mastropasqua
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council (CNR), Bari, Italy
| | - Vittoria Petruzzella
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso, Scuola di Medicina e Chirurgia, Università degli Studi di Bari "Aldo Moro", Bari, Italy
| | - Viola Calabrò
- Department of Biology, University of Naples Federico II, Naples, Italy
| | - Graziano Pesole
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council (CNR), Bari, Italy.,Department of Biosciences, Biotechnology and Biofarmaceutics, University of Bari "Aldo Moro", Bari, Italy
| | - Elisabetta Sbisà
- Institute for Biomedical Technologies, National Research Council (CNR), Bari, Italy
| | - Luisa Guerrini
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Apollonia Tullo
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council (CNR), Bari, Italy
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Fichi G, Naef V, Barca A, Longo G, Fronte B, Verri T, Santorelli FM, Marchese M, Petruzzella V. Fishing in the Cell Powerhouse: Zebrafish as A Tool for Exploration of Mitochondrial Defects Affecting the Nervous System. Int J Mol Sci 2019; 20:ijms20102409. [PMID: 31096646 PMCID: PMC6567007 DOI: 10.3390/ijms20102409] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/11/2019] [Accepted: 05/13/2019] [Indexed: 12/30/2022] Open
Abstract
The zebrafish (Danio rerio) is a small vertebrate ideally suited to the modeling of human diseases. Large numbers of genetic alterations have now been modeled and could be used to study organ development by means of a genetic approach. To date, limited attention has been paid to the possible use of the zebrafish toolbox in studying human mitochondrial disorders affecting the nervous system. Here, we review the pertinent scientific literature discussing the use of zebrafish in modeling gene mutations involved in mitochondria-related neurological human diseases. A critical analysis of the literature suggests that the zebrafish not only lends itself to exploration of the pathological consequences of mitochondrial energy output on the nervous system but could also serve as an attractive platform for future drugs in an as yet untreatable category of human disorders.
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Affiliation(s)
- Gianluca Fichi
- Molecular Medicine, IRCCS Stella Maris, Via dei Giacinti 2, 56028 Pisa, Italy.
| | - Valentina Naef
- Molecular Medicine, IRCCS Stella Maris, Via dei Giacinti 2, 56028 Pisa, Italy.
| | - Amilcare Barca
- Laboratory of General Physiology, Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Provinciale Lecce-Monteroni, 73100 Lecce, Italy.
| | - Giovanna Longo
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari 'Aldo Moro', Piazza Giulio Cesare 11, 70124 Bari, Italy.
| | - Baldassare Fronte
- Department of Veterinary Sciences, University of Pisa, viale delle Piagge 2, 56124 Pisa, Italy.
| | - Tiziano Verri
- Laboratory of General Physiology, Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Provinciale Lecce-Monteroni, 73100 Lecce, Italy.
| | | | - Maria Marchese
- Molecular Medicine, IRCCS Stella Maris, Via dei Giacinti 2, 56028 Pisa, Italy.
| | - Vittoria Petruzzella
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari 'Aldo Moro', Piazza Giulio Cesare 11, 70124 Bari, Italy.
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15
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Bianco A, Valletti A, Longo G, Bisceglia L, Montoya J, Emperador S, Guerriero S, Petruzzella V. Mitochondrial DNA copy number in affected and unaffected LHON mutation carriers. BMC Res Notes 2018; 11:911. [PMID: 30572950 PMCID: PMC6302380 DOI: 10.1186/s13104-018-4025-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 12/17/2018] [Indexed: 01/06/2023] Open
Abstract
OBJECTIVES Leber's hereditary optic neuropathy (LHON) is a mitochondrial genetic disease characterized by a variable and reduced penetrance. Individuals carrying a primary LHON-causing mitochondrial DNA (mtDNA) mutation may either remain asymptomatic lifelong, as unaffected carriers, or develop sudden central visual loss that rapidly aggravates over some weeks. Over the years several genetic/environmental triggers able to modulate the risk of developing LHON have been proposed. We provided data supporting a possible correlation between LHON penetrance and the mtDNA copy number, a raw index of mitochondrial mass, whose increase could represent a compensatory response that cells implement to alleviate the pathogenic effect of the primary LHON-causing mtDNA mutations. DATA DESCRIPTION We collected Italian and Spanish subjects harboring one of the three common LHON primary mutations, either in heteroplasmic or homoplasmic status. For each population we were able to discriminate between affected subjects presenting typical clinical tracts of LHON and LHON-causing mutation carriers showing no symptoms correlated with vision loss. Each subject has been characterized for the presence of a LHON primary mutation, for its status of homoplasmy or heteroplasmy, and for the mtDNA content per cell, expressed as relative mtDNA/nDNA ratio respect to controls. Additional clinical information is present for all the Italian subjects.
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Affiliation(s)
- Angelica Bianco
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, 70124 Bari, Italy
| | - Alessio Valletti
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, 70124 Bari, Italy
| | - Giovanna Longo
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, 70124 Bari, Italy
| | - Luigi Bisceglia
- Ospedale Casa Sollievo della Sofferenza IRCCS, UOC Genetica Medica, San Giovanni Rotondo, Italy
| | - Julio Montoya
- Departamento de Bioquímica y Biología Molecular y Celular, Universidad de Zaragoza-CIBER de Enfermedades Raras (CIBERER)-Instituto de Investigación Sanitaria de Aragón (IIS Aragón), 50013 Zaragoza, Spain
| | - Sonia Emperador
- Departamento de Bioquímica y Biología Molecular y Celular, Universidad de Zaragoza-CIBER de Enfermedades Raras (CIBERER)-Instituto de Investigación Sanitaria de Aragón (IIS Aragón), 50013 Zaragoza, Spain
| | - Silvana Guerriero
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, 70124 Bari, Italy
| | - Vittoria Petruzzella
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, 70124 Bari, Italy
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16
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Bianco A, Bisceglia L, De Caro MF, Galeandro V, De Bonis P, Tullo A, Zoccolella S, Guerriero S, Petruzzella V. Leber's hereditary optic neuropathy, intellectual disability and epilepsy presenting with variable penetrance associated to the m.3460G >A mutation and a heteroplasmic expansion of the microsatellite in MTRNR1 gene - case report. BMC Med Genet 2018; 19:129. [PMID: 30053855 PMCID: PMC6062935 DOI: 10.1186/s12881-018-0644-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 07/12/2018] [Indexed: 01/07/2023]
Abstract
Background Leber’s hereditary optic neuropathy (LHON) associated with mutations in mitochondrial DNA (mtDNA) typically manifests only optic nerve involvement but in some patients may develop additional neurological complications. The cause of this association is not clear. Case presentation We present a case of a 24-year-old male with a history of subacute, painless, and rapidly progressive bilateral vision loss. We performed ophthalmological, neurological and neuropsychological investigations in the proband and his LHON family. The proband showed optic neuropathy, epilepsy, migraine, and intellectual disability; all the maternal relatives did not manifest optic neuropathy but a moderate to severe intellectual disability. Genetic screening revealed a novel association of the LHON m.3460G > A primary mutation with the m.T961delT + C(n)ins within the mitochondrial encoded 12S RNA (MTRNR1) gene which segregates with the intellectual disability through the maternal branch of the family. We also found a significant increase of mtDNA content in all the unaffected homo/heteroplasmic mutation carriers with respect to either affected or control subjects. Conclusion This is the first case reporting the co-segregation of a mutation in MTRNR1 gene with a LHON primary mutation, which may be a risk factor of the extraocular signs complicating LHON phenotype. In addition, the data herein reported, confirmed that the key factor modulating the penetrance of optic atrophy in the family is the amount of mtDNA. Electronic supplementary material The online version of this article (10.1186/s12881-018-0644-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Angelica Bianco
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso, Università degli Studi Aldo Moro, Piazza G. Cesare, 70124, Bari, Italy
| | - Luigi Bisceglia
- Ospedale Casa Sollievo della Sofferenza IRCCS, UOC Genetica Medica, San Giovanni Rotondo, Italy
| | - Maria Fara De Caro
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso, Università degli Studi Aldo Moro, Piazza G. Cesare, 70124, Bari, Italy
| | - Valeria Galeandro
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso, Università degli Studi Aldo Moro, Piazza G. Cesare, 70124, Bari, Italy
| | - Patrizia De Bonis
- Ospedale Casa Sollievo della Sofferenza IRCCS, UOC Genetica Medica, San Giovanni Rotondo, Italy
| | - Apollonia Tullo
- Istituto di Biomembrane, Bioenergetica e Biotecnologie Molecolari, IBIOM - CNR - Via G, Amendola 165/A, 70126, Bari, Italy
| | - Stefano Zoccolella
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso, Università degli Studi Aldo Moro, Piazza G. Cesare, 70124, Bari, Italy
| | - Silvana Guerriero
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso, Università degli Studi Aldo Moro, Piazza G. Cesare, 70124, Bari, Italy
| | - Vittoria Petruzzella
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso, Università degli Studi Aldo Moro, Piazza G. Cesare, 70124, Bari, Italy.
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17
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Affiliation(s)
- Angelica Bianco
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari
| | - Luigi L. Palese
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari
| | - Silvana Guerriero
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari
| | - Vittoria Petruzzella
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari
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18
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Bianco A, Petruzzella V. Author Response: Do High mtDNA Copy Numbers Truly Prevent LHON Manifestations? Invest Ophthalmol Vis Sci 2017; 58:4077. [PMID: 28820924 DOI: 10.1167/iovs.17-22545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Angelica Bianco
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso, Università degli Studi "Aldo Moro", Piazza G. Cesare, Bari, Italy
| | - Vittoria Petruzzella
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso, Università degli Studi "Aldo Moro", Piazza G. Cesare, Bari, Italy
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19
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Bianco A, Bisceglia L, Russo L, Palese LL, D'Agruma L, Emperador S, Montoya J, Guerriero S, Petruzzella V. High Mitochondrial DNA Copy Number Is a Protective Factor From Vision Loss in Heteroplasmic Leber's Hereditary Optic Neuropathy (LHON). ACTA ACUST UNITED AC 2017; 58:2193-2197. [DOI: 10.1167/iovs.16-20389] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Angelica Bianco
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari, Italy
| | - Luigi Bisceglia
- Ospedale ‘Casa Sollievo della Sofferenza' IRCCS, UOC Genetica Medica, San Giovanni Rotondo, Italy
| | - Luciana Russo
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari, Italy
| | - Luigi L. Palese
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari, Italy
| | - Leonardo D'Agruma
- Ospedale ‘Casa Sollievo della Sofferenza' IRCCS, UOC Genetica Medica, San Giovanni Rotondo, Italy
| | - Sonia Emperador
- Departamento de Bioquímica, Biología Molecular y Celular; CIBERER, IIS-Aragón, Universidad de Zaragoza, Zaragoza, Spain
| | - Julio Montoya
- Departamento de Bioquímica, Biología Molecular y Celular; CIBERER, IIS-Aragón, Universidad de Zaragoza, Zaragoza, Spain
| | - Silvana Guerriero
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari, Italy
| | - Vittoria Petruzzella
- Dipartimento di Scienze Mediche di Base, Neuroscienze e Organi di Senso - Università degli Studi Aldo Moro, Piazza G. Cesare, Bari, Italy
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Galeandro V, Notarnicola A, Bianco A, Tafuri S, Russo L, Pesce V, Moretti B, Petruzzella V. ACTN3/ACE genotypes and mitochondrial genome in professional soccer players performance. J BIOL REG HOMEOS AG 2017; 31:207-213. [PMID: 28337894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Two nuclear genes, ACTN3, encoding for the α-actinin skeletal muscle isoform 3, and ACE encoding the angiotensin-converting enzyme, have both been associated with quantitative physical performance traits in the general population. The purpose of our study was to assess the association between the two nuclear gene variants, R577X (rs1815739) in ACTN3 and I/D (rs4340) in ACE, with elite athletes performance and the effect of training on the mitochondrial DNA (mtDNA) content in peripheral blood. We evaluated the genotypes and frequencies of ACTN3 R577X and ACE I/D polymorphisms between soccer players (n = 43) and healthy non-athletic controls (n = 128). Total DNA was extracted from peripheral blood samples using the standard procedure. The genotypes were assessed by PCR-RFLP analysis and mtDNA cellular content by RT-PCR. The soccer players showed a tendency to a prevalence of ACTN3RR and ACEDD genotypes both independently and in co-occurrence. The effect of physical training on the mitochondrial DNA content in the athletic population was reflected strikingly in its increase in peripheral blood. Based on our results, we suggest that the analysis of ACTN3 and ACE genotypes could predict talent in the soccer field and that knowledge of the genetic variants could determine types and training times for soccer players. In addition, the novelty of this work, never before described in the sports literature, is that the increase of mitochondrial content can be correlated with the training load, suggesting that the mtDNA copy number may be considered a viable bioenergetics biomarker.
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Affiliation(s)
- V Galeandro
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - A Notarnicola
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - A Bianco
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - S Tafuri
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
| | - L Russo
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - V Pesce
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - B Moretti
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - V Petruzzella
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
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Bianco A, Martínez-Romero I, Bisceglia L, D'Agruma L, Favia P, Ruiz-Pesini E, Guerriero S, Montoya J, Petruzzella V. Mitochondrial DNA copy number differentiates the Leber’s hereditary optic neuropathy affected individuals from the unaffected mutation carriers. Brain 2015. [DOI: 10.1093/brain/awv216] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Tommasi S, Favia P, Weigl S, Bianco A, Pilato B, Russo L, Paradiso A, Petruzzella V. Mitochondrial DNA variants and risk of familial breast cancer: an exploratory study. Int J Oncol 2014; 44:1691-8. [PMID: 24603941 DOI: 10.3892/ijo.2014.2324] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Accepted: 01/14/2014] [Indexed: 11/06/2022] Open
Abstract
To assess if mitochondrial DNA (mtDNA) variants are associated with mutations in BRCA susceptibility genes and to investigate the possible role of mitochondrial alterations as susceptibility markers in familial breast cancer (BC), 22 patients with or without BRCA1/BRCA2 mutations, 14 sporadic BC patients and 20 healthy subjects were analyzed. In the D-loop and in the MTND4 region, variants significantly associated with BRCA1 carriers were identified. Moreover, examination of mitochondrial haplogroups revealed X as the most significantly frequent haplogroup in BRCA1 carriers (P=0.005), and H as significantly linked to BRCA2 carriers (P=0.05). Our data suggest the involvement of the mitochondrial genome in the pathogenetic and molecular mechanism of familial BC disease.
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Affiliation(s)
- Stefania Tommasi
- National Cancer Research Centre, Istituto Tumori 'Giovanni Paolo II', Bari, Italy
| | - Paola Favia
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari 'Aldo Moro', Bari, Italy
| | - Stefania Weigl
- National Cancer Research Centre, Istituto Tumori 'Giovanni Paolo II', Bari, Italy
| | - Angelica Bianco
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari 'Aldo Moro', Bari, Italy
| | - Brunella Pilato
- National Cancer Research Centre, Istituto Tumori 'Giovanni Paolo II', Bari, Italy
| | - Luciana Russo
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari 'Aldo Moro', Bari, Italy
| | - Angelo Paradiso
- National Cancer Research Centre, Istituto Tumori 'Giovanni Paolo II', Bari, Italy
| | - Vittoria Petruzzella
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari 'Aldo Moro', Bari, Italy
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Cassandrini D, Cilio MR, Bianchi M, Doimo M, Balestri M, Tessa A, Rizza T, Sartori G, Meschini MC, Nesti C, Tozzi G, Petruzzella V, Piemonte F, Bisceglia L, Bruno C, Dionisi-Vici C, D'Amico A, Fattori F, Carrozzo R, Salviati L, Santorelli FM, Bertini E. Pontocerebellar hypoplasia type 6 caused by mutations in RARS2: definition of the clinical spectrum and molecular findings in five patients. J Inherit Metab Dis 2013; 36:43-53. [PMID: 22569581 DOI: 10.1007/s10545-012-9487-9] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 03/26/2012] [Accepted: 04/05/2012] [Indexed: 11/27/2022]
Abstract
Recessive mutations in the mitochondrial arginyl-transfer RNA synthetase (RARS2) gene have been associated with early onset encephalopathy with signs of oxidative phosphorylation defects classified as pontocerebellar hypoplasia 6. We describe clinical, neuroimaging and molecular features on five patients from three unrelated families who displayed mutations in RARS2. All patients rapidly developed a neonatal or early-infantile epileptic encephalopathy with intractable seizures. The long-term follow-up revealed a virtual absence of psychomotor development, progressive microcephaly, and feeding difficulties. Mitochondrial respiratory chain enzymes in muscle and fibroblasts were normal in two. Blood and CSF lactate was abnormally elevated in all five patients at early stages while appearing only occasionally abnormal with the progression of the disease. Cerebellar vermis hypoplasia with normal aspect of the cerebral and cerebellar hemispheres appeared within the first months of life at brain MRI. In three patients follow-up neuroimaging revealed a progressive pontocerebellar and cerebral cortical atrophy. Molecular investigations of RARS2 disclosed the c.25A>G/p.I9V and the c.1586+3A>T in family A, the c.734G>A/p.R245Q and the c.1406G>A/p.R469H in family B, and the c.721T>A/p.W241R and c.35A>G/p.Q12R in family C. Functional complementation studies in Saccharomyces cerevisiae showed that mutation MSR1-R531H (equivalent to human p.R469H) abolished respiration whereas the MSR1-R306Q strain (corresponding to p.R245Q) displayed a reduced growth on non-fermentable YPG medium. Although mutations functionally disrupted yeast we found a relatively well preserved arginine aminoacylation of mitochondrial tRNA. Clinical and neuroimaging findings are important clues to raise suspicion and to reach diagnostic accuracy for RARS2 mutations considering that biochemical abnormalities may be absent in muscle biopsy.
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Artuso L, Zoccolella S, Favia P, Amati A, Capozzo R, Logroscino G, Serlenga L, Simone I, Gasparre G, Petruzzella V. Mitochondrial genome aberrations in skeletal muscle of patients with motor neuron disease. Amyotroph Lateral Scler Frontotemporal Degener 2012; 14:261-6. [DOI: 10.3109/21678421.2012.735239] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Artuso L, Romano A, Verri T, Domenichini A, Argenton F, Santorelli FM, Petruzzella V. Mitochondrial DNA metabolism in early development of zebrafish (Danio rerio). Biochimica et Biophysica Acta (BBA) - Bioenergetics 2012; 1817:1002-11. [DOI: 10.1016/j.bbabio.2012.03.019] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 03/12/2012] [Accepted: 03/14/2012] [Indexed: 10/28/2022]
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Zoccolella S, Artuso L, Capozzo R, Amati A, Guerra F, Simone I, Logroscino G, Petruzzella V. Mitochondrial genome large rearrangements in the skeletal muscle of a patient with PMA. Eur J Neurol 2012; 19:e63-4. [DOI: 10.1111/j.1468-1331.2012.03720.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. Zoccolella
- Department of Neurosciences and Organs of Sense; University of Bari; Bari; Italy
| | - L. Artuso
- Department of Basic Medical Sciences; University of Bari; Bari; Italy
| | - R. Capozzo
- Department of Neurosciences and Organs of Sense; University of Bari; Bari; Italy
| | - A. Amati
- Department of Neurosciences and Organs of Sense; University of Bari; Bari; Italy
| | - F. Guerra
- Department of Gynecological Sciences, Obstetrics and Pediatrics; O.U. Medical Genetics; University of Bologna; Bologna; Italy
| | - I. Simone
- Department of Neurosciences and Organs of Sense; University of Bari; Bari; Italy
| | - G. Logroscino
- Department of Neurosciences and Organs of Sense; University of Bari; Bari; Italy
| | - V. Petruzzella
- Department of Basic Medical Sciences; University of Bari; Bari; Italy
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Petruzzella V, Carrozzo R, Calabrese C, Dell'Aglio R, Trentadue R, Piredda R, Artuso L, Rizza T, Bianchi M, Porcelli AM, Guerriero S, Gasparre G, Attimonelli M. Deep sequencing unearths nuclear mitochondrial sequences under Leber's hereditary optic neuropathy-associated false heteroplasmic mitochondrial DNA variants. Hum Mol Genet 2012; 21:3753-64. [PMID: 22589247 DOI: 10.1093/hmg/dds182] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Leber's hereditary optic neuropathy (LHON) is associated with mitochondrial DNA (mtDNA) ND mutations that are mostly homoplasmic. However, these mutations are not sufficient to explain the peculiar features of penetrance and the tissue-specific expression of the disease and are believed to be causative in association with unknown environmental or other genetic factors. Discerning between clear-cut pathogenetic variants, such as those that appear to be heteroplasmic, and less penetrant variants, such as the homoplasmic, remains a challenging issue that we have addressed here using next-generation sequencing approach. We set up a protocol to quantify MTND5 heteroplasmy levels in a family in which the proband manifests a LHON phenotype. Furthermore, to study this mtDNA haplotype, we applied the cybridization protocol. The results demonstrate that the mutations are mostly homoplasmic, whereas the suspected heteroplasmic feature of the observed mutations is due to the co-amplification of Nuclear mitochondrial Sequences.
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Papa S, Martino PL, Capitanio G, Gaballo A, De Rasmo D, Signorile A, Petruzzella V. The oxidative phosphorylation system in mammalian mitochondria. Adv Exp Med Biol 2012; 942:3-37. [PMID: 22399416 DOI: 10.1007/978-94-007-2869-1_1] [Citation(s) in RCA: 167] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The chapter provides a review of the state of art of the oxidative phosphorylation system in mammalian mitochondria. The sections of the paper deal with: (i) the respiratory chain as a whole: redox centers of the chain and protonic coupling in oxidative phosphorylation (ii) atomic structure and functional mechanism of protonmotive complexes I, III, IV and V of the oxidative phosphorylation system (iii) biogenesis of oxidative phosphorylation complexes: mitochondrial import of nuclear encoded subunits, assembly of oxidative phosphorylation complexes, transcriptional factors controlling biogenesis of the complexes. This advanced knowledge of the structure, functional mechanism and biogenesis of the oxidative phosphorylation system provides a background to understand the pathological impact of genetic and acquired dysfunctions of mitochondrial oxidative phosphorylation.
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Affiliation(s)
- Sergio Papa
- Department of Basic Medical Sciences, University of Bari, Bari, Italy.
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Petruzzella V, Sardanelli AM, Scacco S, Panelli D, Papa F, Trentadue R, Papa S. Dysfunction of mitochondrial respiratory chain complex I in neurological disorders: genetics and pathogenetic mechanisms. Adv Exp Med Biol 2012; 942:371-84. [PMID: 22399432 DOI: 10.1007/978-94-007-2869-1_17] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
This chapter covers genetic and biochemical aspects of mitochondrial bioenergetics dysfunction in neurological disorders associated with complex I defects. Complex I formation and functionality in mammalian cells depends on coordinated expression of nuclear and mitochondrial genes, post-translational subunit modifications, mitochondrial import/maturation of nuclear encoded subunits, subunits interaction and stepwise assembly, and on proteolytic processing. Examples of complex I dysfunction are herein presented: homozygous mutations in the nuclear NDUFS1 and NDUFS4 genes for structural components of complex I; an autosomic recessive form of encephalopathy associated with enhanced proteolytic degradation of complex I; familial cases of Parkinson associated to mutations in the PINK1 and Parkin genes, in particular, homoplasmic mutations in the ND5 and ND6 mitochondrial genes of the complex I, coexistent with mutation in the PINK1 gene. This knowledge, besides clarifying molecular aspects of the pathogenesis of hereditary diseases, can also provide hints for understanding the involvement of complex I in neurological disorders, as well as for developing therapeutical strategies.
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Affiliation(s)
- Vittoria Petruzzella
- Department of Basic Medical Sciences, University of Bari, Policlinico, Bari, Italy
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Rubino F, Piredda R, Calabrese FM, Simone D, Lang M, Calabrese C, Petruzzella V, Tommaseo-Ponzetta M, Gasparre G, Attimonelli M. HmtDB, a genomic resource for mitochondrion-based human variability studies. Nucleic Acids Res 2011; 40:D1150-9. [PMID: 22139932 PMCID: PMC3245114 DOI: 10.1093/nar/gkr1086] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
HmtDB (http://www.hmtdb.uniba.it:8080/hmdb) is a open resource created to support population genetics and mitochondrial disease studies. The database hosts human mitochondrial genome sequences annotated with population and variability data, the latter being estimated through the application of the SiteVar software based on site-specific nucleotide and amino acid variability calculations. The annotations are manually curated thus adding value to the quality of the information provided to the end-user. Classifier tools implemented in HmtDB allow the prediction of the haplogroup for any human mitochondrial genome currently stored in HmtDB or externally submitted de novo by an end-user. Haplogroup definition is based on the Phylotree system. End-users accessing HmtDB are hence allowed to (i) browse the database through the use of a multi-criterion ‘query’ system; (ii) analyze their own human mitochondrial sequences via the ‘classify’ tool (for complete genomes) or by downloading the ‘fragment-classifier’ tool (for partial sequences); (iii) download multi-alignments with reference genomes as well as variability data.
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Affiliation(s)
- Francesco Rubino
- Dipartimento di Biochimica e Biologia Molecolare E Quagliariello, Università degli studi di Bari, Bari 70126, Italy
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Papa S, Rasmo DD, Technikova-Dobrova Z, Panelli D, Signorile A, Scacco S, Petruzzella V, Papa F, Palmisano G, Gnoni A, Micelli L, Sardanelli AM. Respiratory chain complex I, a main regulatory target of the cAMP/PKA pathway is defective in different human diseases. FEBS Lett 2011; 586:568-77. [PMID: 21945319 DOI: 10.1016/j.febslet.2011.09.019] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Revised: 09/08/2011] [Accepted: 09/13/2011] [Indexed: 12/15/2022]
Abstract
In mammals, complex I (NADH-ubiquinone oxidoreductase) of the mitochondrial respiratory chain has 31 supernumerary subunits in addition to the 14 conserved from prokaryotes to humans. Multiplicity of structural protein components, as well as of biogenesis factors, makes complex I a sensible pace-maker of mitochondrial respiration. The work reviewed here shows that the cAMP/PKA pathway regulates the biogenesis, assembly and catalytic activity of complex I and mitochondrial oxygen superoxide production. The structural, functional and regulatory complexity of complex I, renders it particularly vulnerable to genetic and sporadic pathological factors. Complex I dysfunction has, indeed, been found, to be associated with several human diseases. Knowledge of the pathogenetic mechanisms of these diseases can help to develop new therapeutic strategies.
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Affiliation(s)
- Sergio Papa
- Department of Basic Medical Sciences, Section of Medical Biochemistry, University of Bari Aldo Moro, Bari, Italy.
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Guerriero S, Vetrugno M, Ciracì L, Artuso L, Dell'aglio R, Petruzzella V. Bilateral progressive visual loss in an epileptic, mentally retarded boy. Middle East Afr J Ophthalmol 2011; 18:67-70. [PMID: 21572739 PMCID: PMC3085157 DOI: 10.4103/0974-9233.75892] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Leber’s hereditary optic neuropathy (LHON) is a maternally inherited, monosymptomatic disorder, characterized by severe central vision loss and optic atrophy that most frequently affects young men. The classic LHON phenotype is associated to three mitochondrial DNA mutations, mostly homoplasmic, in the Mt-ND4, Mt-ND6, and Mt-ND1 genes, encoding for complex I subunits of the mitochondrial respiratory chain. Rare cases have been described in the literature in association with variable central nervous system involvement in a syndromic form called LHON ‘plus.’ In the present study, we report the case of a 16-year-old boy with the 3460/ND1 mutation who presented with epilepsy, migraine, and mental retardation as non-ophthalmic features. We also investigated his relatives who all had the 3460/ND1 mutation.
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Affiliation(s)
- Silvana Guerriero
- Department of Ophthalmology-Otolaringology, University of Bari, Bari, Italy
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Negro R, Zoccolella S, Dell’Aglio R, Amati A, Artuso L, Bisceglia L, Lavolpe V, Papa S, Serlenga L, Petruzzella V. Molecular analysis in a family presenting with a mild form of late-onset autosomal dominant chronic progressive external ophthalmoplegia. Neuromuscul Disord 2009; 19:423-6. [DOI: 10.1016/j.nmd.2009.04.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2009] [Revised: 03/13/2009] [Accepted: 04/15/2009] [Indexed: 11/25/2022]
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Aniello MS, Martino D, Petruzzella V, Eleopra R, Mancuso M, Dell'Aglio R, Cavallo M, Siciliano G, Defazio G. Bilateral striatal necrosis, dystonia and multiple mitochondrial DNA deletions: Case study and effect of deep brain stimulation. Mov Disord 2008; 23:114-8. [DOI: 10.1002/mds.21760] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Petruzzella V, Tessa A, Torraco A, Fattori F, Dotti MT, Bruno C, Cardaioli E, Papa S, Federico A, Santorelli FM. The NDUFB11 gene is not a modifier in Leber hereditary optic neuropathy. Biochem Biophys Res Commun 2007; 355:181-7. [PMID: 17292333 DOI: 10.1016/j.bbrc.2007.01.140] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2007] [Accepted: 01/24/2007] [Indexed: 11/24/2022]
Abstract
Over 95% of Leber hereditary optic neuropathy (LHON) cases are due to mutations in mitochondrial DNA-encoded subunits of NADH:ubiquinone oxidoreductase (E.C.1.6.5.3., complex I). A recessive X-linked susceptibility gene that acts synergistically with the primary mtDNA mutation to produce visual loss is suggested by the high male-to-female ratio among LHON patients. The ESSS protein is a recently isolated subunit of bovine heart mitochondrial complex I. We revisited the genomic sequence of NDUFB11, the human homolog mapping to chromosome Xp11.23, and identified two mRNA isoforms showing different expression profiles in human tissues. Cultured skin fibroblasts from four LHON patients showed a pattern of expression similar to normal controls. Moreover, NDUFB11 did not seem to influence risk and age at onset of visual loss in a total of 65 individuals from 35 Italian LHON families. Also, the gene was not affected in 11 children with a severe encephalopathy associated with decreased complex I activity in skeletal muscle.
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Affiliation(s)
- Vittoria Petruzzella
- Department of Medical Biochemistry, Medical Biology and Medical Physics, University of Bari, Piazza G. Cesare 11, 70124 Bari, Italy.
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Bertolino A, Rubino V, Sambataro F, Blasi G, Latorre V, Fazio L, Caforio G, Petruzzella V, Kolachana B, Hariri A, Meyer-Lindenberg A, Nardini M, Weinberger DR, Scarabino T. Prefrontal-hippocampal coupling during memory processing is modulated by COMT val158met genotype. Biol Psychiatry 2006; 60:1250-8. [PMID: 16950222 DOI: 10.1016/j.biopsych.2006.03.078] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2005] [Revised: 03/24/2006] [Accepted: 03/28/2006] [Indexed: 11/18/2022]
Abstract
BACKGROUND Studies in humans and in animals have demonstrated that a network of brain regions is involved in performance of declarative and recognition memory tasks. This network includes the hippocampal formation (HF) as well as the ventrolateral prefrontal cortex (VLPFC). Studies in animals have suggested that the relationship between these brain regions is strongly modulated by dopamine. METHODS Using fMRI in healthy humans matched for a series of demographic and genetic variables, we studied the effect of the COMT val158met polymorphism on function of HF and VLPFC as well as on their functional coupling during recognition memory. RESULTS The COMT Val allele was associated with: relatively poorer performance at retrieval; reduced recruitment of neuronal resources in HF and increased recruitment in VLPFC during both encoding and retrieval; and unfavorable functional coupling between these two regions at retrieval. Moreover, functional coupling during retrieval was predictive of behavioral accuracy. CONCLUSIONS These results shed new light on individual differences in responsivity and connectivity between HF and VLPFC related to genetic modulation of dopamine, a mechanism accounting at least in part for individual differences in recognition memory performance.
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Affiliation(s)
- Alessandro Bertolino
- Psychiatric Neuroscience Group, Section on Mental Disorders, Department of Psychiatric and Neurological Sciences, University of Bari, Bari, Italy.
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Bertolino A, Caforio G, Petruzzella V, Latorre V, Rubino V, Dimalta S, Torraco A, Blasi G, Quartesan R, Mattay VS, Callicott JH, Weinberger DR, Scarabino T. Prefrontal dysfunction in schizophrenia controlling for COMT Val158Met genotype and working memory performance. Psychiatry Res 2006; 147:221-6. [PMID: 16952445 DOI: 10.1016/j.pscychresns.2006.04.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2005] [Revised: 03/22/2006] [Accepted: 04/02/2006] [Indexed: 11/27/2022]
Abstract
Earlier studies with functional imaging in schizophrenia have demonstrated dysfunction of the dorsolateral prefrontal cortex during working memory. Controlling for behavioral performance and for catechol-O-methyltransferase (COMT) Val158Met genotype, we here demonstrate in a functional magnetic resonance imaging paradigm that patients recruit greater neuronal resources in prefrontal cortex during working memory, suggesting that this phenotype is a core functional trait of the disease. We also replicated earlier findings that the Val allele of the COMT polymorphism is associated with greater engagement of the prefrontal cortex.
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Affiliation(s)
- Alessandro Bertolino
- Psychiatric Neuroscience Group, Section on Mental Disorders, Department of Psychiatric and Neurological Sciences, University of Bari, Bari, Italy.
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Scacco S, Petruzzella V, Bertini E, Luso A, Papa F, Bellomo F, Signorile A, Torraco A, Papa S. Mutations in structural genes of complex I associated with neurological diseases. Ital J Biochem 2006; 55:254-62. [PMID: 17274530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
This paper summarizes observations on the genetic and biochemical basis of hereditary defects of complex I (NADH-ubiquinone oxidoreductase) of the respiratory chain in human neurological patients. Two different types of functional defects of the complex are described. In one type mutations in the NDUFS1 and NDUFS4 nuclear structural genes of the complex were identified in two unrelated families. Both NDUFS1 and NDUFS4 neurological disorders were transmitted by autosomic recessive inheritance. The two mutations resulted in different impact on cellular metabolism. The NDUFS4 mutation, giving a more severe, fatal pathological pattern, resulted in a defective assembly of the complex and complete suppression of the enzymatic activity. The NDUFS1 mutation, with less severe progressive pathology, caused only partial inhibition of the complex but enhanced production of oxygen free radicals. In the second type of deficiencies extensive mutational analysis did not reveal pathogenic mutations in complex I genes but a decline in the level and activity of complex I, III, and IV were found, apparently associated with alteration in the cardiolipin membrane distribution.
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Affiliation(s)
- Salvatore Scacco
- Department of Medical Biochemistry, Biology and Physics, University of Bari, Italy
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Bertolino A, Blasi G, Latorre V, Rubino V, Rampino A, Sinibaldi L, Caforio G, Petruzzella V, Pizzuti A, Scarabino T, Nardini M, Weinberger DR, Dallapiccola B. Additive effects of genetic variation in dopamine regulating genes on working memory cortical activity in human brain. J Neurosci 2006; 26:3918-22. [PMID: 16611807 PMCID: PMC6673886 DOI: 10.1523/jneurosci.4975-05.2006] [Citation(s) in RCA: 173] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Functional polymorphisms in the catechol-O-methyltransferase (COMT) and the dopamine transporter (DAT) genes modulate dopamine inactivation, which is crucial for determining neuronal signal-to-noise ratios in prefrontal cortex during working memory. We show that the COMT Met158 allele and the DAT 3' variable number of tandem repeat 10-repeat allele are independently associated in healthy humans with more focused neuronal activity (as measured with blood oxygen level-dependent functional magnetic resonance imaging) in the working memory cortical network, including the prefrontal cortex. Moreover, subjects homozygous for the COMT Met allele and the DAT 10-repeat allele have the most focused response, whereas the COMT Val and the DAT 9-repeat alleles have the least. These results demonstrate additive genetic effects of genes regulating dopamine signaling on specific neuronal networks subserving working memory.
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Affiliation(s)
- Alessandro Bertolino
- Psychiatric Neuroscience Group, Department of Neurological and Psychiatric Sciences, University of Bari, 70124 Bari, Italy.
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Iuso A, Scacco S, Piccoli C, Bellomo F, Petruzzella V, Trentadue R, Minuto M, Ripoli M, Capitanio N, Zeviani M, Papa S. Dysfunctions of cellular oxidative metabolism in patients with mutations in the NDUFS1 and NDUFS4 genes of complex I. J Biol Chem 2006; 281:10374-80. [PMID: 16478720 DOI: 10.1074/jbc.m513387200] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The pathogenic mechanism of a G44A nonsense mutation in the NDUFS4 gene and a C1564A mutation in the NDUFS1 gene of respiratory chain complex I was investigated in fibroblasts from human patients. As previously observed the NDUFS4 mutation prevented complete assembly of the complex and caused full suppression of the activity. The mutation (Q522K replacement) in NDUFS1 gene, coding for the 75-kDa Fe-S subunit of the complex, was associated with (a) reduced level of the mature complex, (b) marked, albeit not complete, inhibition of the activity, (c) accumulation of H(2)O(2) and O(2)(.-) in mitochondria, (d) decreased cellular content of glutathione, (e) enhanced expression and activity of glutathione peroxidase, and (f) decrease of the mitochondrial potential and enhanced mitochondrial susceptibility to reactive oxygen species (ROS) damage. No ROS increase was observed in the NDUFS4 mutation. Exposure of the NDUFS1 mutant fibroblasts to dibutyryl-cAMP stimulated the residual NADH-ubiquinone oxidoreductase activity, induced disappearance of ROS, and restored the mitochondrial potential. These are relevant observations for a possible therapeutical strategy in NDUFS1 mutant patients.
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Affiliation(s)
- Arcangela Iuso
- Department of Medical Biochemistry, Biology, and Physics, University of Bari, Policlinico, Piazza Giulio Cesare, 70124 Bari, Italy
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Zoccolella S, Torraco A, Amati A, Lamberti P, Serlenga L, Papa S, Petruzzella V. Unusual clinical presentation of a patient carrying a novel single 1.8 kb deletion of mitochondrial DNA. Funct Neurol 2006; 21:39-41. [PMID: 16735000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Kearns-Sayre syndrome (KSS) is a mitochondrial encephalomyopathy characterized by progressive external ophthalmoplegia (PEO), pigmentary retinopathy and onset before the age of 20 years. Cerebellar ataxia, as well as short stature and increased protein content in the cerebrospinal fluid, are frequent additional symptoms. A single large mitochondrial (mt) DNA deletion of 4,977 bp is the most common molecular defect in KSS. Recently, different mutations have also been associated with incomplete, KSS-like phenotypes. We describe the unusual clinical presentation of a patient carrying a novel 1,814-bp deletion of mtDNA. In contrast with typical KSS, the clinical picture of this patient did not include either palpebral ptosis or PEO and was dominated by an ataxic syndrome.
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Petruzzella V, Panelli D, Torraco A, Stella A, Papa S. Mutations in theNDUFS4gene of mitochondrial complex I alter stability of the splice variants. FEBS Lett 2005; 579:3770-6. [PMID: 15975579 DOI: 10.1016/j.febslet.2005.05.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2005] [Revised: 05/05/2005] [Accepted: 05/10/2005] [Indexed: 11/22/2022]
Abstract
The effect on the stability of alternative transcripts of different mutations of the NDUFS4 gene in patients with Leigh syndrome with complex I deficiency is presented. Normally, two NDUFS4 splice variants are degraded by nonsense mediated mRNA decay (NMD) while a third form does not trigger NMD degradation. In a patient with a premature termination codon in exon 1, all the three splice variants are up-regulated. The present is the first case of a nonsense mutation leading to the abrogation of NMD, which can represent an additional event to be considered in the evaluation of clinically relevant mutations.
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Affiliation(s)
- Vittoria Petruzzella
- Department of Medical Biochemistry and Medical Biology, University of Bari, Piazza G. Cesare, Bari 70124, Italy
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Petruzzella V, Baggetto LG, Penin F, Cafagna F, Ruggiero FM, Cantatore P, Gadaleta MN. In vivo effect of acetyl-L-carnitine on succinate oxidation, adenine nucleotide pool and lipid composition of synaptic and non-synaptic mitochondria from cerebral hemispheres of senescent rats. Arch Gerontol Geriatr 2005; 14:131-44. [PMID: 15374398 DOI: 10.1016/0167-4943(92)90048-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/1991] [Revised: 10/30/1991] [Accepted: 11/07/1991] [Indexed: 11/22/2022]
Abstract
The effect of acetyl-L-carnitine on succinate oxidation, adenine nucleotide pool and lipid composition of synaptic and 'free', non-synaptic, mitochondria in cerebral hemispheres of senescent rats has been studied. Fisher rats (24- or 28-month-old) were treated with acetyl-L-carnitine (300 mg/kg body wt., intraperitoneally (i.p.)) 3 h before being killed. Oxygen consumption was measured using succinate as a substrate; adenine nucleotides and lipids were analyzed by high performance liquid chromatography (HPLC). Acetyl-L-carnitine reverses, in synaptic mitochondria, the age-related decrease in the respiratory control ratio due to a higher state 4 respiration rate. Administration of acetyl-L-carnitine to senescent rats does not affect the total adenine nucleotide pool of synaptic and non-synaptic mitochondria which was unchanged with age. Finally, pretreatment of senescent rats with acetyl-L-carnitine brings the cholesterol and phospholipid contents of synaptic mitochondria, reduced in senescent rats, to the adult level; pretreatment of adult rats has no such effect. Altogether these results suggest that acetyl-L-carnitine is able to reverse age-related deficits of brain mitochondria.
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Affiliation(s)
- V Petruzzella
- Dipartimento di Biochimica e Biologia Molecolare e Centro Studi su Mitocondri e Metabolismo Energetico, Università di Bari, Bari, Italia
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Bertolino A, Caforio G, Blasi G, De Candia M, Latorre V, Petruzzella V, Altamura M, Nappi G, Papa S, Callicott JH, Mattay VS, Bellomo A, Scarabino T, Weinberger DR, Nardini M. Interaction of COMT (Val(108/158)Met) genotype and olanzapine treatment on prefrontal cortical function in patients with schizophrenia. Am J Psychiatry 2004; 161:1798-805. [PMID: 15465976 DOI: 10.1176/ajp.161.10.1798] [Citation(s) in RCA: 161] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Deficits in working memory and in prefrontal cortical physiology are important outcome measures in schizophrenia, and both have been associated with dopamine dysregulation and with a functional polymorphism (Val(108/158)Met) in the catechol O-methyltransferase (COMT) gene that affects dopamine inactivation in the prefrontal cortex. The purpose of the present study was to evaluate in patients with schizophrenia the effect of COMT genotype on symptom variation, working memory performance, and prefrontal cortical physiology in response to treatment with an atypical antipsychotic drug. METHOD Thirty patients with acute untreated schizophrenia were clinically evaluated with the Positive and Negative Syndrome Scale, underwent COMT Val/Met genotyping, and entered an 8-week prospective study of olanzapine treatment. Twenty patients completed two 3-T functional magnetic resonance imaging scans at 4 and 8 weeks during performance of N-back working memory tasks. RESULTS There was a significant interaction of COMT genotype and the effects of olanzapine on prefrontal cortical function. Met allele load predicted improvement in working memory performance and prefrontal physiology after 8 weeks of treatment. A similar effect was found also for negative symptoms assessed with the Positive and Negative Syndrome Scale. CONCLUSIONS These results suggest that a genetically determined variation in prefrontal dopamine catabolism impacts the therapeutic profile of olanzapine.
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Affiliation(s)
- Alessandro Bertolino
- Dipartimento di Scienze Neurologiche e Psichiatriche, Universita' degli Studi di Bari, Piazza Giulio Cesare-9, 70124, Bari, Italy.
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Papa S, Petruzzella V, Scacco S, Vergari R, Panelli D, Tamborra R, Corsi P, Picciariello M, Lambo R, Bertini E, Santorelli FM. Respiratory complex I in brain development and genetic disease. Neurochem Res 2004; 29:547-60. [PMID: 15038602 DOI: 10.1023/b:nere.0000014825.42365.16] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A study is presented on the expression and activity of complex I, as well as of other complexes of the respiratory chain, in the course of brain development and inherited encephalopathies. Investigations on mouse hippocampal cells show that differentiation of these cells both in vivo and in cell cultures is associated with the expression of a functional complex I, whose activity markedly increases with respect to that of complexes III and IV. Data are presented on genetic defects of complex I in six children with inborn encephalopathy associated with isolated deficiency of the complex. Mutations have been identified in nuclear and mitochondrial genes coding for subunits of the complex. Different mutations were found in the nuclear NDUFS4 gene coding for the 18 kD (IP, AQDQ) subunit of complex I. All the NDUFS4 mutations resulted in impairment of the assembly of a functional complex. The observations presented provide evidence showing a critical role of complex I in differentiation and functional activity of brain cells.
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Affiliation(s)
- Sergio Papa
- Department of Medical Biochemistry and Medical Biology, University of Bari, Piazza G. Cesare 70124 Bari, Italy.
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Petruzzella V, Zoccolella S, Amati A, Torraco A, Lamberti P, Carnicella F, Serlenga L, Papa S. Cerebellar ataxia as atypical manifestation of the 3243A>G MELAS mutation. Clin Genet 2003; 65:64-5. [PMID: 15032978 DOI: 10.1111/j..2004.00185.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Scacco S, Petruzzella V, Budde S, Vergari R, Tamborra R, Panelli D, van den Heuvel LP, Smeitink JA, Papa S. Pathological mutations of the human NDUFS4 gene of the 18-kDa (AQDQ) subunit of complex I affect the expression of the protein and the assembly and function of the complex. J Biol Chem 2003; 278:44161-7. [PMID: 12944388 DOI: 10.1074/jbc.m307615200] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Presented is a study of the impact on the structure and function of human complex I of three different homozygous mutations in the NDUFS4 gene coding for the 18-kDa subunit of respiratory complex I, inherited by autosomal recessive mode in three children affected by a fatal neurological Leigh-like syndrome. The mutations consisted, respectively, of a AAGTC duplication at position 466-470 of the coding sequence, a single base deletion at position 289/290, and a G44A nonsense mutation in the first exon of the gene. All three mutations were found to be associated with a defect of the assembly of a functional complex in the inner mitochondrial membrane. In all the mutations, in addition to destruction of the carboxyl-terminal segment of the 18-kDa subunit, the amino-terminal segment of the protein was also missing. In the mutation that was expected to produce a truncated subunit, the disappearance of the protein was associated with an almost complete disappearance of the NDUFS4 transcript. These observations show the essential role of the NDUFS4 gene in the structure and function of complex I and give insight into the pathogenic mechanism of NDUFS4 gene mutations in a severe defect of complex I.
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Affiliation(s)
- Salvatore Scacco
- Department of Medical Biochemistry and Medical Biology, University of Bari, 70124 Bari, Italy
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Petruzzella V, Di Giacinto G, Scacco S, Piemonte F, Torraco A, Carrozzo R, Vergari R, Dionisi-Vici C, Longo D, Tessa A, Papa S, Bertini E. Atypical Leigh syndrome associated with the D393N mutation in the mitochondrial ND5 subunit. Neurology 2003; 61:1017-8. [PMID: 14557590 DOI: 10.1212/01.wnl.0000080363.10902.e9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- V Petruzzella
- Department of Medical Biochemistry & Medical Biology, University of Bari, Italy
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Abstract
Atp11p (Atpaf1p; F(1)-ATPase assembly factor 1) and Atp12p (Atpaf2p; F(1)-ATPase assembly factor 2) are proteins required for the assembly of beta (F(1)-beta) and alpha (F(1)-alpha) subunits into the mitochondrial ATPase. Here we report about 100 times lower levels of ATPAF1 and ATPAF2 transcripts in relation to the mRNA levels of F(1)-alpha and F(1)-beta in a range of mouse tissues. Quantitative reverse-transcription polymerase chain reaction revealed nearly constant ATPAF1 expression in all tissues in both adult and 5-day-old mice (up to two-fold differences), indicating that ATPAF1 rather behaves like a maintenance gene. In contrast, ATPAF2 expression differed up to 30-fold in the tissues analysed. ATPAF2 tissue-specific expression was also found to correlate well with mRNA levels of both F(1)-alpha and F(1)-beta (BATz.Gt;kidney, liver>heart, brain>skeletal muscle), showing the highest mRNA level in the thermogenic, ATPase-poor brown adipose tissue, which is characterised by a 10-fold decrease in ATPase/respiratory chain stoichiometry relative to the other tissues.
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Affiliation(s)
- Andrea Picková
- Institute of Physiology and Centre for Integrated Genomics, Academy of Sciences of the Czech Republic, 142 20 4 - Krc, Prague, Czech Republic
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Budde SMS, van den Heuvel LPWJ, Smeets RJP, Skladal D, Mayr JA, Boelen C, Petruzzella V, Papa S, Smeitink JAM. Clinical heterogeneity in patients with mutations in the NDUFS4 gene of mitochondrial complex I. J Inherit Metab Dis 2003; 26:813-5. [PMID: 14765537 DOI: 10.1023/b:boli.0000010003.14113.af] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A comparison of the clinical presentation, disease course and results of laboratory and imaging studies of all patients so far published with a NDUFS4 mutation are presented. This reveals marked clinical heterogeneity, even in patients with the same genotype.
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Affiliation(s)
- S M S Budde
- Nijmegen Center for Mitochondrial Disorders, Department of Pediatrics, University Medical Center Nijmegen, Geert Grooteplein 20, 6500 HB Nijmegen, The Netherlands
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