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Yang CW, Li CI, Liu CS, Lin CH, Lin WY, Li TC, Lin CC. Mitochondrial DNA haplogroup D and brain microstructure regulate cognitive function among community-dwelling older adults. Arch Gerontol Geriatr 2024; 117:105197. [PMID: 37741134 DOI: 10.1016/j.archger.2023.105197] [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: 05/30/2023] [Revised: 09/12/2023] [Accepted: 09/12/2023] [Indexed: 09/25/2023]
Abstract
INTRODUCTION Maintaining physical and cognitive function among older adults is important. These functional states are affected by mitochondria through various mechanisms, such as cellular energy production and oxidative stress control. Owing to its involvement in the relations among the brain, cognition, and physical function, mitochondrial function may be affected by mitochondrial DNA (mtDNA) haplogroups. This study explored the effect of mtDNA haplogroups and brain microstructure on physical and cognitive functions among community-dwelling older adults. METHODS This study was a community-based cross-sectional research. A total of 128 subjects aged 65 years and older without dementia completed several assessments, including mtDNA sequencing, physical and cognitive function tests, and magnetic resonance imaging (MRI) scans. Cognitive function and impairment were assessed by the MMSE and AD8 questionnaires. mtDNA haplogroups were classified by HaploGrep 2 software, and white matter microstructural integrity was scanned by 3T MRI. RESULTS The mean age of the subjects was 77.3 years. After the adjustment for covariates, the mtDNA haplogroup D carriers showed significantly lower mini-mental state examination (MMSE) scores than other carriers (p = 0.047). Further considering the brain microstructure, the mtDNA haplogroup D (p = 0.002) and white matter volumes in the left precuneus corrected for total intracranial volumes (p = 0.014) were found to be independently influencing factors of the MMSE scores. CONCLUSIONS The mtDNA haplogroup D and white matter microstructure regulated the cognitive function among community-dwelling older adults. The findings provide new insights into the research gap. Scientists must further venture into this field.
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Affiliation(s)
- Chuan-Wei Yang
- Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Chia-Ing Li
- Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan
| | - Chiu-Shong Liu
- School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan; Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Chih-Hsueh Lin
- School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan; Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Wen-Yuan Lin
- School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan; Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Tsai-Chung Li
- Department of Public Health, College of Public Health, China Medical University, Taichung, Taiwan; Department of Healthcare Administration, College of Medical and Health Sciences, Asia University, Taichung, Taiwan.
| | - Cheng-Chieh Lin
- Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan; Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan.
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Abstract
The mitochondrion is an intracellular organelle thought to originate from endosymbiosis between an ancestral eukaryotic cell and an α-proteobacterium. Mitochondria are the powerhouses of the cell, and can control several important processes within the cell, such as cell death. Conversely, dysregulation of mitochondria possibly contributes to the pathophysiology of several autoimmune diseases. Defects in mitochondria can be caused by mutations in the mitochondrial genome or by chronic exposure to pro-inflammatory cytokines, including type I interferons. Following the release of intact mitochondria or mitochondrial components into the cytosol or the extracellular space, the bacteria-like molecular motifs of mitochondria can elicit pro-inflammatory responses by the innate immune system. Moreover, antibodies can target mitochondria in autoimmune diseases, suggesting an interplay between the adaptive immune system and mitochondria. In this Review, we discuss the roles of mitochondria in rheumatic diseases such as systemic lupus erythematosus, antiphospholipid syndrome and rheumatoid arthritis. An understanding of the different contributions of mitochondria to distinct rheumatic diseases or manifestations could permit the development of novel therapeutic strategies and the use of mitochondria-derived biomarkers to inform pathogenesis.
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Affiliation(s)
- Yann L C Becker
- Centre de Recherche ARThrite-Arthrite, Recherche et Traitements, Université Laval, Québec, QC, Canada
- Centre de Recherche du CHU de Québec-Université Laval, Axe Maladies infectieuses et immunitaires, Québec, QC, Canada
- Département de microbiologie et immunologie, Université Laval, Québec, QC, Canada
| | - Bhargavi Duvvuri
- Division of Rheumatology, University of Washington, Seattle, WA, USA
| | - Paul R Fortin
- Centre de Recherche ARThrite-Arthrite, Recherche et Traitements, Université Laval, Québec, QC, Canada
- Centre de Recherche du CHU de Québec-Université Laval, Axe Maladies infectieuses et immunitaires, Québec, QC, Canada
- Division of Rheumatology, Department of Medicine, CHU de Québec-Université Laval, Québec, QC, Canada
| | - Christian Lood
- Division of Rheumatology, University of Washington, Seattle, WA, USA.
| | - Eric Boilard
- Centre de Recherche ARThrite-Arthrite, Recherche et Traitements, Université Laval, Québec, QC, Canada.
- Centre de Recherche du CHU de Québec-Université Laval, Axe Maladies infectieuses et immunitaires, Québec, QC, Canada.
- Département de microbiologie et immunologie, Université Laval, Québec, QC, Canada.
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Zhao Y, Peng C, Zhang J, Lai R, Zhang X, Guo Z. Mitochondrial Displacement Loop Region SNPs Modify Sjögren’s Syndrome Development by Regulating Cytokines Expression in Female Patients. Front Genet 2022; 13:847521. [PMID: 35360865 PMCID: PMC8963357 DOI: 10.3389/fgene.2022.847521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 01/02/2022] [Accepted: 02/28/2022] [Indexed: 12/02/2022] Open
Abstract
Mitochondrial dysfunction could induce innate immune response with cytokines releasing to initiate Sjögren’s syndrome (SS) onset. Single nucleotide polymorphisms (SNPs) in the mitochondrial displacement loop (D-loop) and mitochondrial DNA (mtDNA) copy number of female SS patients were evaluated for their association with SS in female patients. At the nucleotide site of 152, 16304, 16311 and 16362 in the D-loop, the frequencies for the minor alleles of 152C (p = 0.040, odds ratio [OR] = 0.504), 16304C (p = 0.045, OR = 0.406), 16311C (p = 0.045, OR = 0.406) and 16362C (p = 0.028, OR = 0.519) were significantly higher in the SS patients than those in the female controls, which indicated that 152,C, 16304C, 16311C, and 16362C allele in the D-loop of mtDNA were associated with the risk of SS. Meanwhile, the excessive SNPs were accumulated in D-loop region of SS patients (8.955 ± 2.028 versus 7.898 ± 1.987, p < 0.001, 95% confidence interval [CI]: 0.477–1.637) and mtDNA copy number increased in SS patients (1.509 ± 0.836 versus 1.221 ± 0.506, p = 0.006, 95% CI: 0.086–0.490) by a case-control analysis. The subsequent analysis showed that SS risk-related allele 16311C was associated with higher IL-2 levels (p = 0.010) at significantly statistical level whereas 152C associated with lower IL-10 levels (p = 0.058) at a borderline statistical levels. Our findings suggest that mitochondrial D-loop SNPs are predictors for SS risk, it might modify the SS development by regulating cytokine expression.
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Affiliation(s)
- Yufei Zhao
- Department of Immunology and Rheumatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Chenxing Peng
- Department of Immunology and Rheumatology, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Jingjing Zhang
- Department of Immunology and Rheumatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Ruixue Lai
- Department of Immunology and Rheumatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xiaoyun Zhang
- Department of Immunology and Rheumatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Zhanjun Guo
- Department of Immunology and Rheumatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
- *Correspondence: Zhanjun Guo,
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Saha SK, Saba AA, Hasib M, Rimon RA, Hasan I, Alam MS, Mahmud I, Nabi AN. Evaluation of D-loop hypervariable region I variations, haplogroups and copy number of mitochondrial DNA in Bangladeshi population with type 2 diabetes. Heliyon 2021; 7:e07573. [PMID: 34377852 PMCID: PMC8327661 DOI: 10.1016/j.heliyon.2021.e07573] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/01/2021] [Accepted: 07/12/2021] [Indexed: 10/24/2022] Open
Abstract
The profound impact of mitochondrion in cellular metabolism has been well documented. Since type 2 diabetes (T2D) is a metabolic disorder, mitochondrial dysfunction is intricately linked with the disease pathogenesis. Mitochondrial DNA (mtDNA) variants are involved with functional dysfunction of mitochondrion and play a pivotal role in the susceptibility to T2D. In this study, we opted to find the association of mtDNA variants within the D-loop hypervariable region I (HVI), haplogroups and mtDNA copy number with T2D in Bangladeshi population. A total of 300 unrelated Bangladeshi individuals (150 healthy and 150 patients with T2D) were recruited in the present study, their HVI regions were amplified and sequenced using Sanger chemistry. Haplogrep2 and Phylotree17 tools were employed to determine the haplogroups. MtDNA copy number was measured using primers of mitochondrial tRNALeu (UUR) gene and nuclear β2-microglobulin gene. Variants G16048A (OR:0.12, p = 0.04) and G16129A (OR: 0.42, p = 0.007) were found to confer protective role against T2D according to logistic regression analysis. However along with G16129A, two new variants C16294T and T16325C demonstrated protective role against T2D when age and gender were adjusted. Haplogroups A and H showed significant association with the risk of T2D after adjustments out of total 19 major haplogroups identified. The mtDNA copy numbers were stratified into 4 groups according to the quartiles (groups with lower, medium, upper and higher mtDNA copy numbers were respectively designated as LCN, MCN, UCN and HCN). Patients with T2D had significantly lower mtDNA copy number compared to their healthy counterparts in HCN group. Moreover, six mtDNA variants were significantly associated with mtDNA copy number in the participants. Thus, our study confers that certain haplogroups and novel variants of mtDNA are significantly associated with T2D while decreased mtDNA copy number (though not significant) has been observed in patients with T2D. However, largescale studies are warranted to establish association of novel variants and haplogroup with type 2 diabetes.
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Affiliation(s)
- Sajoy Kanti Saha
- Laboratory of Population Genetics, Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka 1000, Bangladesh
| | - Abdullah Al Saba
- Laboratory of Population Genetics, Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka 1000, Bangladesh
| | - Md. Hasib
- Laboratory of Population Genetics, Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka 1000, Bangladesh
| | - Razoan Al Rimon
- Laboratory of Population Genetics, Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka 1000, Bangladesh
| | - Imrul Hasan
- Laboratory of Population Genetics, Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka 1000, Bangladesh
| | - Md. Sohrab Alam
- Department of Immunology, Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders, Shahbagh, Dhaka, Bangladesh
| | - Ishtiaq Mahmud
- Laboratory of Population Genetics, Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka 1000, Bangladesh
| | - A.H.M. Nurun Nabi
- Laboratory of Population Genetics, Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka 1000, Bangladesh
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Deng X, Ji D, Li X, Xu Y, Cao Y, Zou W, Liang C, Lee Marley J, Zhang Z, Wei Z, Zhou P, Liu Y, Cao Y. Polymorphisms and haplotype of mitochondrial DNA D-loop region are associated with polycystic ovary syndrome in a Chinese population. Mitochondrion 2021; 57:173-81. [PMID: 33385542 DOI: 10.1016/j.mito.2020.12.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/16/2020] [Accepted: 12/16/2020] [Indexed: 01/29/2023]
Abstract
Polymorphisms in mitochondrial DNA (mtDNA) have been linked to a range of diseases. Here we investigate the relationship between mtDNA D-loop region polymorphisms, mtDNA haplotype and polycystic ovary syndrome (PCOS), as well as the correlation of D-loop variants and clinical characteristics of PCOS, in a Chinese population. The mtDNA D-loop of whole blood samples from 421 PCOS patients and 409 controls underwent next generation sequencing. The variants G207A (PBH<0.05), 16036GGins (PBH<0.05) and 16049Gins (PBH<0.001) were associated with decreased risk of PCOS. No variants were associated with PCOS, and within the PCOS group, no statistical significance was found between D-loop polymorphisms and clinical characteristics. Patient haplotype was identified from D-loop single nucleotide polymorphisms and analysis suggested that haplotype A15 (P adjusted <0.01) was significantly associated with decreased risk of PCOS. In conclusion, mtDNA D-loop alterations and haplotype appear to confer resistance to PCOS in Chinese women.
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Sun D, Yao S, Wu F, Deng W, Ma Y, Jin L, Wang J, Wang X. Mitochondrial DNA Haplogroup M7 Confers Disability in a Chinese Aging Population. Front Genet 2020; 11:577795. [PMID: 33193696 PMCID: PMC7645148 DOI: 10.3389/fgene.2020.577795] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 06/29/2020] [Accepted: 10/06/2020] [Indexed: 12/24/2022] Open
Abstract
Mitochondrial DNA (mtDNA) haplogroups have been associated with functional impairments (i.e., decreased gait speed and grip strength, frailty), which are risk factors of disability. However, the association between mtDNA haplogroups and ADL disability is still unclear. In this study, we conducted an investigation of 25 mtSNPs defining 17 major mtDNA haplogroups for ADL disability in an aging Chinese population. We found that mtDNA haplogroup M7 was associated with an increased risk of disability (OR = 3.18 [95% CI = 1.29-7.83], P = 0.012). The survival rate of the M7 haplogroup group (6.1%) was lower than that of the non-M7 haplogroup group (9.5%) after a 6-year follow-up. In cellular studies, cytoplasmic hybrid (cybrid) cells with the M7 haplogroup showed distinct mitochondrial functions from the M8 haplogroup. Specifically, the respiratory chain complex capacity was significantly lower in M7 haplogroup cybrids than in M8 haplogroup cybrids. Furthermore, an obvious decreased mitochondrial membrane potential and 40% reduced ATP-linked oxygen consumption were found in M7 haplogroup cybrids compared to M8 haplogroup cybrids. Notably, M7 haplogroup cybrids generated more reactive oxygen species (ROS) than M8 haplogroup cybrids. Therefore, the M7 haplogroup may contribute to the risk of disability via altering mitochondrial function to some extent, leading to decreased oxygen consumption, but increased ROS production, which may activate mitochondrial retrograde signaling pathways to impair cellular and tissue function.
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Affiliation(s)
- Dayan Sun
- Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
| | - Shun Yao
- Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China.,Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, Shanghai, China
| | - Fei Wu
- Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Wan Deng
- Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Yanyun Ma
- Six-sector Industrial Research Institute, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
| | - Li Jin
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
| | - Jiucun Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
| | - Xiaofeng Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
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Kozin MS, Kulakova OG, Kiselev IS, Boyko AN, Favorova OO. Variability of the Mitochondrial Genome and Development of the Primary Progressing form of Multiple Sclerosis. Mol Biol 2020. [DOI: 10.1134/s0026893320040081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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