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Dunn PJ, Harvey NR, Maksemous N, Smith RA, Sutherland HG, Haupt LM, Griffiths LR. Investigation of Mitochondrial Related Variants in a Cerebral Small Vessel Disease Cohort. Mol Neurobiol 2022; 59:5366-5378. [PMID: 35699875 PMCID: PMC9395495 DOI: 10.1007/s12035-022-02914-3] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 06/03/2022] [Indexed: 11/25/2022]
Abstract
Monogenic forms of cerebral small vessel disease (CSVD) can be caused by both variants in nuclear DNA and mitochondrial DNA (mtDNA). Mitochondrial encephalopathy, lactic acidosis, and stroke-like episodes (MELAS) is known to have a phenotype similar to Cerebral Autosomal Dominant Arteriopathy with Sub-cortical Infarcts and Leukoencephalopathy (CADASIL), and can be caused by variants in the mitochondrial genome and in several nuclear-encoded mitochondrial protein (NEMP) genes. The aim of this study was to screen for variants in the mitochondrial genome and NEMP genes in a NOTCH3-negative CADASIL cohort, to identify a potential link between mitochondrial dysfunction and CSVD pathology. Whole exome sequencing was performed for 50 patients with CADASIL-like symptomology on the Ion Torrent system. Mitochondrial sequencing was performed using an in-house designed protocol with sequencing run on the Ion GeneStudio S5 Plus (S5 +). NEMP genes and mitochondrial sequencing data were examined for rare (MAF < 0.001), non-synonymous variants that were predicted to have a deleterious effect on the protein. We identified 29 candidate NEMP variants that had links to either MELAS-, encephalopathy-, or Alzheimer’s disease–related phenotypes. Based on these changes, variants affecting POLG, MTO1, LONP1, NDUFAF6, NDUFB3, and TCIRG1 were thought to play a potential role in CSVD pathology in this cohort. Overall, the exploration of the mitochondrial genome identified a potential role for mitochondrial related proteins and mtDNA variants contributing to CSVD pathologies.
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Affiliation(s)
- P J Dunn
- Centre for Genomics and Personalised Health, Genomics Research Centre, School of Biomedical Sciences, Queensland University of Technology (QUT), 60 Musk Ave., Kelvin Grove, Queensland, 4059, Australia
- Health Sciences and Medicine Faculty, Bond University, 14 University Drive, Robina, Queensland, Australia
| | - N R Harvey
- Centre for Genomics and Personalised Health, Genomics Research Centre, School of Biomedical Sciences, Queensland University of Technology (QUT), 60 Musk Ave., Kelvin Grove, Queensland, 4059, Australia
- Health Sciences and Medicine Faculty, Bond University, 14 University Drive, Robina, Queensland, Australia
- Department of Medical and Molecular Genetics, Guy's Hospital, Kings College London, London, SE1 9RT, England
| | - N Maksemous
- Centre for Genomics and Personalised Health, Genomics Research Centre, School of Biomedical Sciences, Queensland University of Technology (QUT), 60 Musk Ave., Kelvin Grove, Queensland, 4059, Australia
| | - R A Smith
- Centre for Genomics and Personalised Health, Genomics Research Centre, School of Biomedical Sciences, Queensland University of Technology (QUT), 60 Musk Ave., Kelvin Grove, Queensland, 4059, Australia
| | - H G Sutherland
- Centre for Genomics and Personalised Health, Genomics Research Centre, School of Biomedical Sciences, Queensland University of Technology (QUT), 60 Musk Ave., Kelvin Grove, Queensland, 4059, Australia
| | - L M Haupt
- Centre for Genomics and Personalised Health, Genomics Research Centre, School of Biomedical Sciences, Queensland University of Technology (QUT), 60 Musk Ave., Kelvin Grove, Queensland, 4059, Australia
| | - L R Griffiths
- Centre for Genomics and Personalised Health, Genomics Research Centre, School of Biomedical Sciences, Queensland University of Technology (QUT), 60 Musk Ave., Kelvin Grove, Queensland, 4059, Australia.
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Harvey NR, Voisin S, Lea RA, Yan X, Benton MC, Papadimitriou ID, Jacques M, Haupt LM, Ashton KJ, Eynon N, Griffiths LR. Investigating the influence of mtDNA and nuclear encoded mitochondrial variants on high intensity interval training outcomes. Sci Rep 2020; 10:11089. [PMID: 32632177 PMCID: PMC7338527 DOI: 10.1038/s41598-020-67870-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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] [Received: 03/05/2020] [Accepted: 05/26/2020] [Indexed: 02/08/2023] Open
Abstract
Mitochondria supply intracellular energy requirements during exercise. Specific mitochondrial haplogroups and mitochondrial genetic variants have been associated with athletic performance, and exercise responses. However, these associations were discovered using underpowered, candidate gene approaches, and consequently have not been replicated. Here, we used whole-mitochondrial genome sequencing, in conjunction with high-throughput genotyping arrays, to discover novel genetic variants associated with exercise responses in the Gene SMART (Skeletal Muscle Adaptive Response to Training) cohort (n = 62 completed). We performed a Principal Component Analysis of cohort aerobic fitness measures to build composite traits and test for variants associated with exercise outcomes. None of the mitochondrial genetic variants but eight nuclear encoded variants in seven separate genes were found to be associated with exercise responses (FDR < 0.05) (rs11061368: DIABLO, rs113400963: FAM185A, rs6062129 and rs6121949: MTG2, rs7231304: AFG3L2, rs2041840: NDUFAF7, rs7085433: TIMM23, rs1063271: SPTLC2). Additionally, we outline potential mechanisms by which these variants may be contributing to exercise phenotypes. Our data suggest novel nuclear-encoded SNPs and mitochondrial pathways associated with exercise response phenotypes. Future studies should focus on validating these variants across different cohorts and ethnicities.
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Affiliation(s)
- N R Harvey
- Health Sciences and Medicine Faculty, Bond University, Robina, QLD, 4226, Australia.,Genomics Research Centre, School of Biomedical Sciences, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia
| | - S Voisin
- Institute for Health and Sport (IHES), Victoria University, Footscray, VIC, 3011, Australia
| | - R A Lea
- Genomics Research Centre, School of Biomedical Sciences, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia
| | - X Yan
- Institute for Health and Sport (IHES), Victoria University, Footscray, VIC, 3011, Australia
| | - M C Benton
- Genomics Research Centre, School of Biomedical Sciences, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia
| | - I D Papadimitriou
- Institute for Health and Sport (IHES), Victoria University, Footscray, VIC, 3011, Australia
| | - M Jacques
- Institute for Health and Sport (IHES), Victoria University, Footscray, VIC, 3011, Australia
| | - L M Haupt
- Genomics Research Centre, School of Biomedical Sciences, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia
| | - K J Ashton
- Health Sciences and Medicine Faculty, Bond University, Robina, QLD, 4226, Australia
| | - N Eynon
- Institute for Health and Sport (IHES), Victoria University, Footscray, VIC, 3011, Australia
| | - L R Griffiths
- Genomics Research Centre, School of Biomedical Sciences, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia.
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Biedermann NE, Harvey NR. War time experiences of triage and resuscitation: Australian Army nurses in the Vietnam War, 1967-1971. Accid Emerg Nurs 2001; 9:138-42. [PMID: 11761867 DOI: 10.1054/aaen.2000.0227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The experiences of nurses in war is prolifically described in the North American scholarly literature, and in the Australian nursing literature to a lesser extent. The literature describes the plights and achievements of nurses caring for soldiers and civilians often under the most undesirable of circumstances. A central focus of war time nursing is the resuscitation of critically wounded soldiers. This paper addresses the experiences of the Australian Army nurses who were involved in the triage and resuscitation of critically wounded allied and enemy soldiers in the Vietnam War between 1967 and 1971. As part of a research study to explore and analyse the nature of nursing work in the Vietnam War, seventeen Vietnam veteran nurses were interviewed about their experiences. This paper explores the progression of the triage department in the Australian military hospital in Vung Tau, and it highlights that the majority of the nurses who took part in this study were clinically unprepared, particularly as emergency nurses.
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Affiliation(s)
- N E Biedermann
- School of Nursing Sciences, James Cook University, Townsville QLD 4811, Australia.
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