1
|
van der Ven AT, Cabrera-Orefice A, Wente I, Feichtinger RG, Tsiakas K, Weiss D, Bierhals T, Scholle L, Prokisch H, Kopajtich R, Santer R, Mayr JA, Hempel M, Wittig I. Expanding the phenotypic and biochemical spectrum of NDUFAF3-related mitochondrial disease. Mol Genet Metab 2023; 140:107675. [PMID: 37572574 DOI: 10.1016/j.ymgme.2023.107675] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/27/2023] [Accepted: 07/30/2023] [Indexed: 08/14/2023]
Abstract
Recessive variants in NDUFAF3 are a known cause of complex I (CI)-related mitochondrial disorders (MDs). The seven patients reported to date exhibited severe neurologic symptoms and lactic acidosis, followed by a fatal course and death during infancy in most cases. We present a 10-year-old patient with a neurodevelopmental disorder, progressive exercise intolerance, dystonia, basal ganglia abnormalities, and elevated lactate concentration in blood. Trio-exome sequencing revealed compound-heterozygosity for a pathogenic splice-site and a likely pathogenic missense variant in NDUFAF3. Spectrophotometric analysis of fibroblast-derived mitochondria demonstrated a relatively mild reduction of CI activity. Complexome analyses revealed severely reduced NDUFAF3 as well as CI in patient fibroblasts. Accumulation of early sub-assemblies of the membrane arm of CI associated with mitochondrial complex I intermediate assembly (MCIA) complex was observed. The most striking additional findings were both the unusual occurrence of free monomeric CI holding MCIA and other assembly factors. Here we discuss our patient in context of genotype, phenotype and metabolite data from previously reported NDUFAF3 cases. With the atypical presentation of our patient, we provide further insight into the phenotypic spectrum of NDUFAF3-related MDs. Complexome analysis in our patient confirms the previously defined role of NDUFAF3 within CI biogenesis, yet adds new aspects regarding the correct timing of both the association of soluble and membrane arm modules and CI-maturation as well as respiratory supercomplex formation.
Collapse
Affiliation(s)
- Amelie T van der Ven
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - Alfredo Cabrera-Orefice
- Functional Proteomics, Institute of Cardiovascular Physiology, Goethe University, Frankfurt am Main, Germany
| | - Isabell Wente
- Functional Proteomics, Institute of Cardiovascular Physiology, Goethe University, Frankfurt am Main, Germany
| | - René G Feichtinger
- University Children's Hospital, Salzburger Landeskliniken (SALK) and Paracelsus Medical University (PMU), Salzburg, Austria
| | - Konstantinos Tsiakas
- Department of Pediatrics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Deike Weiss
- Department of Pediatrics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tatjana Bierhals
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Leila Scholle
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Holger Prokisch
- Institute of Human Genetics, Klinikum Rechts der Isar, TUM, Munich, Germany.; Institute of Neurogenomics, Helmholtz Center Munich, Neuherberg, Germany
| | - Robert Kopajtich
- Institute of Human Genetics, Klinikum Rechts der Isar, TUM, Munich, Germany.; Institute of Neurogenomics, Helmholtz Center Munich, Neuherberg, Germany
| | - René Santer
- Department of Pediatrics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Johannes A Mayr
- University Children's Hospital, Salzburger Landeskliniken (SALK) and Paracelsus Medical University (PMU), Salzburg, Austria
| | - Maja Hempel
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Institute of Human Genetics, University Hospital Heidelberg, Heidelberg, Germany
| | - Ilka Wittig
- Functional Proteomics, Institute of Cardiovascular Physiology, Goethe University, Frankfurt am Main, Germany
| |
Collapse
|
2
|
Eckert D, Rapp F, Tsedeke AT, Kraft D, Wente I, Molendowska J, Basheer S, Langhans M, Meckel T, Friedrich T, Donaubauer AJ, Becker I, Frey B, Fournier C. Modulation of Differentiation and Bone Resorbing Activity of Human (Pre-) Osteoclasts After X-Ray Exposure. Front Immunol 2022; 13:817281. [PMID: 35603191 PMCID: PMC9116137 DOI: 10.3389/fimmu.2022.817281] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 04/08/2022] [Indexed: 11/13/2022] Open
Abstract
Low-dose radiotherapy (LD-RT) is a local treatment option for patients with chronic degenerative and inflammatory diseases, in particular musculoskeletal diseases. Despite reported analgesic and anti-inflammatory effects, cellular and molecular mechanisms related to osteoimmunological effects are still elusive. Here we test the hypothesis that X-irradiation inhibits the differentiation of precursor osteoclasts into mature osteoclasts (mOC) and their bone resorbing activity. Circulating monocytes from healthy donors were isolated and irradiated after attachment with single or fractionated X-ray doses, comparable to an LD-RT treatment scheme. Then monocytes underwent ex vivo differentiation into OC during cultivation up to 21 days, under conditions mimicking the physiological microenvironment of OC on bone. After irradiation, apoptotic frequencies were low, but the total number of OC precursors and mOC decreased up to the end of the cultivation period. On top, we observed an impairment of terminal differentiation, i.e. a smaller fraction of mOC, reduced resorbing activity on bone, and release of collagen fragments. We further analyzed the effect of X-irradiation on multinucleation, resulting from the fusion of precursor OC, which occurs late during OC differentiation. At 21 days after exposure, the observation of smaller cellular areas and a reduced number of nuclei per mOC suggest an impaired fusion of OC precursors to form mOC. Before, at 14 days, the nuclear translocation of Nuclear Factor Of Activated T Cells 1 (NFATc1), a master regulator of osteoclast differentiation and fusion, was decreased. In first results, obtained in the frame of a longitudinal LD-RT study, we previously reported a pain-relieving effect in patients. However, in a subgroup of patients suffering from Calcaneodynia or Achillodynia, we did not observe a consistent decrease of established blood markers for resorption and formation of bone, or modified T cell subtypes involved in regulating these processes. To assess the relevance of changes in bone metabolism for other diseases treated with LD-RT will be subject of further studies. Taken together, we observed that in vitro X-irradiation of monocytes results in an inhibition of the differentiation into bone-resorbing OC and a concomitant reduction of resorbing activity. The detected reduced NFATc1 signaling could be one underlying mechanism.
Collapse
Affiliation(s)
- Denise Eckert
- Department of Biophysics, Gesellschaft für Schwerionenforschung (GSI) Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Felicitas Rapp
- Department of Biophysics, Gesellschaft für Schwerionenforschung (GSI) Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Ayele Taddese Tsedeke
- Department of Biophysics, Gesellschaft für Schwerionenforschung (GSI) Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Daniela Kraft
- Department of Biophysics, Gesellschaft für Schwerionenforschung (GSI) Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Isabell Wente
- Department of Biophysics, Gesellschaft für Schwerionenforschung (GSI) Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Jessica Molendowska
- Department of Biophysics, Gesellschaft für Schwerionenforschung (GSI) Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Sidra Basheer
- Department of Biophysics, Gesellschaft für Schwerionenforschung (GSI) Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Markus Langhans
- Department of Macromolecular and Paper Chemistry and Membrane Dynamics, Technical University Darmstadt, Darmstadt, Germany
| | - Tobias Meckel
- Department of Macromolecular and Paper Chemistry and Membrane Dynamics, Technical University Darmstadt, Darmstadt, Germany
| | - Thomas Friedrich
- Department of Biophysics, Gesellschaft für Schwerionenforschung (GSI) Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Anna-Jasmina Donaubauer
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Ina Becker
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Benjamin Frey
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Claudia Fournier
- Department of Biophysics, Gesellschaft für Schwerionenforschung (GSI) Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| |
Collapse
|