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Novosel D, Brajković V, Simčič M, Zorc M, Svara T, Cakanic KB, Jungić A, Logar B, Cubric-Curik V, Dovc P, Curik I. The Consequences of Mitochondrial T10432C Mutation in Cika Cattle: A “Potential” Model for Leber’s Hereditary Optic Neuropathy. Int J Mol Sci 2022; 23:ijms23116335. [PMID: 35683014 PMCID: PMC9181260 DOI: 10.3390/ijms23116335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 06/02/2022] [Accepted: 06/04/2022] [Indexed: 12/04/2022] Open
Abstract
While mitogenome mutations leading to pathological manifestations are rare, more than 200 such mutations have been described in humans. In contrast, pathogenic mitogenome mutations are rare in domestic animals and have not been described at all in cattle. In the small local Slovenian cattle breed Cika, we identified (next-generation sequencing) two cows with the T10432C mitogenome mutation in the ND4L gene, which corresponds to the human T10663C mutation known to cause Leber’s hereditary optic neuropathy (LHON). Pedigree analysis revealed that the cows in which the mutation was identified belong to two different maternal lineages with 217 individual cows born between 1997 and 2020. The identified mutation and its maternal inheritance were confirmed by Sanger sequencing across multiple generations, whereas no single analysis revealed evidence of heteroplasmy. A closer clinical examination of one cow with the T10432C mutation revealed exophthalmos, whereas histopathological examination revealed retinal ablations, subretinal oedema, and haemorrhage. The results of these analyses confirm the presence of mitochondrial mutation T10432C with homoplasmic maternal inheritance as well as clinical and histopathological signs similar to LHON in humans. Live animals with the mutation could be used as a suitable animal model that can improve our understanding of the pathogenesis of LHON and other mitochondriopathies.
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Affiliation(s)
- Dinko Novosel
- Department of Pathology, Croatian Veterinary Institute, 10000 Zagreb, Croatia;
- Department of Animal Science, Faculty of Agriculture, University of Zagreb, 10000 Zagreb, Croatia; (V.B.); (V.C.-C.)
- Correspondence: (D.N.); (I.C.); Tel.: +385-91-5179431 (D.N.); +385-98-474406 (I.C.)
| | - Vladimir Brajković
- Department of Animal Science, Faculty of Agriculture, University of Zagreb, 10000 Zagreb, Croatia; (V.B.); (V.C.-C.)
| | - Mojca Simčič
- Department of Animal Science, Biotechnical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia; (M.S.); (M.Z.); (P.D.)
| | - Minja Zorc
- Department of Animal Science, Biotechnical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia; (M.S.); (M.Z.); (P.D.)
| | - Tanja Svara
- Institute of Pathology, Wild Animals, Fish and Bees, Veterinary Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia;
| | | | - Andreja Jungić
- Department of Virology, Croatian Veterinary Institute, 10000 Zagreb, Croatia;
| | - Betka Logar
- Agricultural Institute of Slovenia, 1000 Ljubljana, Slovenia;
| | - Vlatka Cubric-Curik
- Department of Animal Science, Faculty of Agriculture, University of Zagreb, 10000 Zagreb, Croatia; (V.B.); (V.C.-C.)
| | - Peter Dovc
- Department of Animal Science, Biotechnical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia; (M.S.); (M.Z.); (P.D.)
| | - Ino Curik
- Department of Animal Science, Faculty of Agriculture, University of Zagreb, 10000 Zagreb, Croatia; (V.B.); (V.C.-C.)
- Correspondence: (D.N.); (I.C.); Tel.: +385-91-5179431 (D.N.); +385-98-474406 (I.C.)
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Chae HW, Na JH, Kwon A, Kim HS, Lee YM. Central precocious puberty may be a manifestation of endocrine dysfunction in pediatric patients with mitochondrial disease. Eur J Pediatr 2021; 180:425-432. [PMID: 32914201 DOI: 10.1007/s00431-020-03804-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 09/02/2020] [Accepted: 09/07/2020] [Indexed: 12/23/2022]
Abstract
We retrospectively reviewed the data of 140 female pediatric patients with rare mitochondrial diseases (MDs) confirmed using muscle biopsy. We evaluated patients who were diagnosed with central precocious puberty (PP) with early pubertal development to determine whether PP is a clinical manifestation of MDs. We also examined the clinical, auxiological, laboratory, and radiological parameters after 1 year of gonadotropin-releasing hormone treatment for central PP. Among the 140 girls with MDs, 29 had early pubertal development and underwent endocrine evaluation. Ten (7.1%) patients were diagnosed with central PP; the prevalence of central PP was higher than was that previously thought. Patients with central PP exhibited bone age advancement over 1 year and increased sex hormone levels despite their young age at diagnosis. Serum estradiol levels were significantly higher in younger patients than in older patients (P = 0.004). Patients with central PP treated with gonadotropin-releasing hormone had favorable outcomes, and their pubertal development was suppressed for 1 year.Conclusion: Central PP may be a manifestation of endocrine dysfunction in young girls with MDs. What is Known: • The general characteristics of mitochondrial diseases include developmental delays and retarded growth. • Precocious puberty has rarely been suggested as a clinical manifestation of mitochondrial diseases. What is New: • Among the 140 girls with mitochondrial diseases, 10 (7.1%) were diagnosed with central precocious puberty. • Serum estradiol levels were significantly higher in younger patients than in older patients.
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Affiliation(s)
- Hyun-Wook Chae
- Department of Pediatrics, Gangnam Severance Hospital, Severance Children's Hospital, Yonsei University College of Medicine, 211 Eonjuro, Seodaemun-gu, Seoul, South Korea
| | - Ji-Hoon Na
- Department of Pediatrics, Gangnam Severance Hospital, Severance Children's Hospital, Yonsei University College of Medicine, 211 Eonjuro, Seodaemun-gu, Seoul, South Korea
| | - Ahreum Kwon
- Department of Pediatrics, Gangnam Severance Hospital, Severance Children's Hospital, Yonsei University College of Medicine, 211 Eonjuro, Seodaemun-gu, Seoul, South Korea
| | - Ho-Seong Kim
- Department of Pediatrics, Gangnam Severance Hospital, Severance Children's Hospital, Yonsei University College of Medicine, 211 Eonjuro, Seodaemun-gu, Seoul, South Korea
| | - Young-Mock Lee
- Department of Pediatrics, Gangnam Severance Hospital, Severance Children's Hospital, Yonsei University College of Medicine, 211 Eonjuro, Seodaemun-gu, Seoul, South Korea.
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Wheel and Deal in the Mitochondrial Inner Membranes: The Tale of Cytochrome c and Cardiolipin. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:6813405. [PMID: 32377304 PMCID: PMC7193304 DOI: 10.1155/2020/6813405] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 02/28/2020] [Indexed: 12/15/2022]
Abstract
Cardiolipin oxidation and degradation by different factors under severe cell stress serve as a trigger for genetically encoded cell death programs. In this context, the interplay between cardiolipin and another mitochondrial factor—cytochrome c—is a key process in the early stages of apoptosis, and it is a matter of intense research. Cytochrome c interacts with lipid membranes by electrostatic interactions, hydrogen bonds, and hydrophobic effects. Experimental conditions (including pH, lipid composition, and post-translational modifications) determine which specific amino acid residues are involved in the interaction and influence the heme iron coordination state. In fact, up to four binding sites (A, C, N, and L), driven by different interactions, have been reported. Nevertheless, key aspects of the mechanism for cardiolipin oxidation by the hemeprotein are well established. First, cytochrome c acts as a pseudoperoxidase, a process orchestrated by tyrosine residues which are crucial for peroxygenase activity and sensitivity towards oxidation caused by protein self-degradation. Second, flexibility of two weakest folding units of the hemeprotein correlates with its peroxidase activity and the stability of the iron coordination sphere. Third, the diversity of the mode of interaction parallels a broad diversity in the specific reaction pathway. Thus, current knowledge has already enabled the design of novel drugs designed to successfully inhibit cardiolipin oxidation.
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Macheiner T, Fengler VHI, Agreiter M, Eisenberg T, Madeo F, Kolb D, Huppertz B, Ackbar R, Sargsyan K. Magnetomitotransfer: An efficient way for direct mitochondria transfer into cultured human cells. Sci Rep 2016; 6:35571. [PMID: 27767193 PMCID: PMC5073296 DOI: 10.1038/srep35571] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 10/03/2016] [Indexed: 12/14/2022] Open
Abstract
In the course of mitochondrial diseases standard care mostly focuses on treatment of symptoms, while therapeutic approaches aimed at restoring mitochondrial function are currently still in development. The transfer of healthy or modified mitochondria into host cells would open up the possibilities of new cell therapies. Therefore, in this study, a novel method of mitochondrial transfer is proposed by anti-TOM22 magnetic bead-labeled mitochondria with the assistance of a magnetic plate. In comparison to the passive transfer method, the magnetomitotransfer method was more efficient at transferring mitochondria into cells (78–92% vs 0–17% over 3 days). This transfer was also more rapid, with a high ratio of magnetomitotransferred cells and high density of transferred mitochondria within the first day of culture. Importantly, transferred mitochondria appeared to be functional as they strongly enhanced respiration in magnetomitotransferred cells. The novel method of magnetomitotransfer may offer potential for therapeutic approaches for treatment of a variety of mitochondria-associated pathologies, e.g. various neurodegenerative diseases.
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Affiliation(s)
| | | | - Marlene Agreiter
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Austria
| | - Tobias Eisenberg
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Austria.,BioTechMed Graz, Graz, Austria
| | - Frank Madeo
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Austria.,BioTechMed Graz, Graz, Austria
| | - Dagmar Kolb
- Institute of Cell Biology, Histology and Embryology, Medical University of Graz, Austria.,Core Facility Ultrastructure Analysis/Center for Medical Research (ZMF), Medical University of Graz, Austria
| | - Berthold Huppertz
- Biobank Graz, Medical University of Graz, Austria.,Institute of Cell Biology, Histology and Embryology, Medical University of Graz, Austria
| | - Richard Ackbar
- Biobank Graz, Medical University of Graz, Austria.,CBmed GmbH - Biomarker Research in Medicine, Graz, Austria
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