1
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Onieva A, Martin J, R Cuesta-Aguirre D, Planells V, Coronado-Zamora M, Beyer K, Vega T, Lozano JE, Santos C, Aluja MP. Complete mitochondrial DNA profile in stroke: A geographical matched case-control study in Spanish population. Mitochondrion 2023; 73:51-61. [PMID: 37793469 DOI: 10.1016/j.mito.2023.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 08/28/2023] [Accepted: 10/01/2023] [Indexed: 10/06/2023]
Abstract
INTRODUCTION Stroke, the second leading cause of death worldwide, is a complex disease influenced by many risk factors among which we can find reactive oxygen species (ROS). Since mitochondria are the main producers of cellular ROS, nowadays studies are trying to elucidate the role of these organelles and its DNA (mtDNA) variation in stroke risk. The aim of the present study was to perform a comprehensive evaluation of the association between mtDNA mutations and mtDNA content and stroke risk. MATERIAL AND METHODS Homoplasmic and heteroplasmic mutations of the mtDNA were analysed in a case-controls study using 110 S cases and their corresponding control individuals. Mitochondrial DNA copy number (mtDNA-CN) was analysed in 73 of those case-control pairs. RESULTS Our results suggest that haplogroup V, specifically variants m.72C > T, m.4580G > A, m.15904C > T and m.16298 T > C have a protective role in relation to stroke risk. On the contrary, variants m.73A > G, m.11719G > A and m.14766C > T appear to be genetic risk factors for stroke. In this study, we found no statistically significant association between stroke risk and mitochondrial DNA copy number. CONCLUSIONS These results demonstrate the possible role of mtDNA genetics on the pathogenesis of stroke, probably through alterations in mitochondrial ROS production.
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Affiliation(s)
- Ana Onieva
- Unitat d'Antropologia Biològica, Departament BAVE, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Spain.
| | - Joan Martin
- Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Spain
| | - Daniel R Cuesta-Aguirre
- Unitat d'Antropologia Biològica, Departament BAVE, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Spain
| | - Violeta Planells
- Unitat d'Antropologia Biològica, Departament BAVE, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Spain
| | - Marta Coronado-Zamora
- Institut de Biotecnologia i Biomedicina; Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Spain
| | - Katrin Beyer
- Department of Pathology, Germans Trias i Pujol Research Institute, Badalona 08916 Barcelona, Spain
| | - Tomás Vega
- Dirección General de Salud Pública. Consejería de Sanidad. Junta de Castilla y León, 47007 Valladolid, Spain
| | - José Eugenio Lozano
- Dirección General de Salud Pública. Consejería de Sanidad. Junta de Castilla y León, 47007 Valladolid, Spain
| | - Cristina Santos
- Unitat d'Antropologia Biològica, Departament BAVE, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Spain
| | - Maria Pilar Aluja
- Unitat d'Antropologia Biològica, Departament BAVE, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Spain.
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2
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Garcia-Gaona E, García-Gregorio A, García-Jiménez C, López-Olaiz MA, Mendoza-Ramírez P, Fernandez-Guzman D, Pillado-Sánchez RA, Soto-Pacheco AD, Yareni-Zuñiga L, Sánchez-Parada MG, González-Santiago AE, Román-Pintos LM, Castañeda-Arellano R, Hernández-Ortega LD, Mercado-Sesma AR, Orozco-Luna FDJ, Villa-Angulo C, Villa-Angulo R, Baptista-Rosas RC. mtDNA Single-Nucleotide Variants Associated with Type 2 Diabetes. Curr Issues Mol Biol 2023; 45:8716-8732. [PMID: 37998725 PMCID: PMC10670651 DOI: 10.3390/cimb45110548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/25/2023] Open
Abstract
Type 2 diabetes (T2D) is a chronic systemic disease with a complex etiology, characterized by insulin resistance and mitochondrial dysfunction in various cell tissues. To explore this relationship, we conducted a secondary analysis of complete mtDNA sequences from 1261 T2D patients and 1105 control individuals. Our findings revealed significant associations between certain single-nucleotide polymorphisms (SNPs) and T2D. Notably, the variants m.1438A>G (rs2001030) (controls: 32 [27.6%], T2D: 84 [72.4%]; OR: 2.46; 95%CI: 1.64-3.78; p < 0.001), m.14766C>T (rs193302980) (controls: 498 [36.9%], T2D: 853 [63.1%]; OR: 2.57, 95%CI: 2.18-3.04, p < 0.001), and m.16519T>C (rs3937033) (controls: 363 [43.4%], T2D: 474 [56.6%]; OR: 1.24, 95%CI: 1.05-1.47, p = 0.012) were significantly associated with the likelihood of developing diabetes. The variant m.16189T>C (rs28693675), which has been previously documented in several studies across diverse populations, showed no association with T2D in our analysis (controls: 148 [13.39] T2D: 171 [13.56%]; OR: 1.03; 95%CI: 0.815-1.31; p = 0.83). These results provide evidence suggesting a link between specific mtDNA polymorphisms and T2D, possibly related to association rules, topological patterns, and three-dimensional conformations associated with regions where changes occur, rather than specific point mutations in the sequence.
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Affiliation(s)
- Enrique Garcia-Gaona
- Facultad de Medicina, Benemérita Universidad Autónoma de Puebla, Puebla 72420, Mexico;
| | - Alhelí García-Gregorio
- Facultad de Enfermería Región Poza Rica-Tuxpan, Universidad Veracruzana, Veracruz 91700, Mexico;
| | - Camila García-Jiménez
- Facultad de Ciencias Médicas y Biológicas “Dr. Ignacio Chávez”, Universidad Michoacana de San Nicolás de Hidalgo, Morelia 58000, Mexico;
| | | | - Paola Mendoza-Ramírez
- Facultad de Ciencias Biológicas, Benemérita Universidad Autónoma de Puebla, Puebla 72420, Mexico;
| | | | | | - Axel David Soto-Pacheco
- Facultad de Medicina Extensión Los Mochis, Universidad Autónoma de Sinaloa, Sinaloa 81223, Mexico; (R.A.P.-S.); (A.D.S.-P.)
| | - Laura Yareni-Zuñiga
- Departamento de Ciencias de la Salud-Enfermedad como Proceso Individual, Centro Universitario de Tonalá, Universidad de Guadalajara, Tonalá 45425, Mexico; (L.Y.-Z.); (L.M.R.-P.); (A.R.M.-S.)
| | - María Guadalupe Sánchez-Parada
- Departamento de Ciencias Biomédicas, Centro Universitario de Tonalá, Universidad de Guadalajara, Tonalá 45425, Mexico; (M.G.S.-P.); (A.E.G.-S.); (R.C.-A.); (L.D.H.-O.)
- Centro de Investigación Multidisciplinaria en Salud, Universidad de Guadalajara, Tonalá 45425, Mexico
| | - Ana Elizabeth González-Santiago
- Departamento de Ciencias Biomédicas, Centro Universitario de Tonalá, Universidad de Guadalajara, Tonalá 45425, Mexico; (M.G.S.-P.); (A.E.G.-S.); (R.C.-A.); (L.D.H.-O.)
- Centro de Investigación Multidisciplinaria en Salud, Universidad de Guadalajara, Tonalá 45425, Mexico
| | - Luis Miguel Román-Pintos
- Departamento de Ciencias de la Salud-Enfermedad como Proceso Individual, Centro Universitario de Tonalá, Universidad de Guadalajara, Tonalá 45425, Mexico; (L.Y.-Z.); (L.M.R.-P.); (A.R.M.-S.)
- Centro de Investigación Multidisciplinaria en Salud, Universidad de Guadalajara, Tonalá 45425, Mexico
| | - Rolando Castañeda-Arellano
- Departamento de Ciencias Biomédicas, Centro Universitario de Tonalá, Universidad de Guadalajara, Tonalá 45425, Mexico; (M.G.S.-P.); (A.E.G.-S.); (R.C.-A.); (L.D.H.-O.)
- Centro de Investigación Multidisciplinaria en Salud, Universidad de Guadalajara, Tonalá 45425, Mexico
| | - Luis Daniel Hernández-Ortega
- Departamento de Ciencias Biomédicas, Centro Universitario de Tonalá, Universidad de Guadalajara, Tonalá 45425, Mexico; (M.G.S.-P.); (A.E.G.-S.); (R.C.-A.); (L.D.H.-O.)
- Centro de Investigación Multidisciplinaria en Salud, Universidad de Guadalajara, Tonalá 45425, Mexico
| | - Arieh Roldán Mercado-Sesma
- Departamento de Ciencias de la Salud-Enfermedad como Proceso Individual, Centro Universitario de Tonalá, Universidad de Guadalajara, Tonalá 45425, Mexico; (L.Y.-Z.); (L.M.R.-P.); (A.R.M.-S.)
- Centro de Investigación Multidisciplinaria en Salud, Universidad de Guadalajara, Tonalá 45425, Mexico
| | | | - Carlos Villa-Angulo
- Laboratorio de Bioinformática y Biofotónica, Instituto de Ingeniería Universidad Autónoma de Baja California, Mexicali 21100, Mexico; (C.V.-A.); (R.V.-A.)
| | - Rafael Villa-Angulo
- Laboratorio de Bioinformática y Biofotónica, Instituto de Ingeniería Universidad Autónoma de Baja California, Mexicali 21100, Mexico; (C.V.-A.); (R.V.-A.)
| | - Raúl C. Baptista-Rosas
- Departamento de Ciencias de la Salud-Enfermedad como Proceso Individual, Centro Universitario de Tonalá, Universidad de Guadalajara, Tonalá 45425, Mexico; (L.Y.-Z.); (L.M.R.-P.); (A.R.M.-S.)
- Centro de Investigación Multidisciplinaria en Salud, Universidad de Guadalajara, Tonalá 45425, Mexico
- Hospital General de Occidente, Secretaría de Salud Jalisco, Zapopan 45170, Mexico
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3
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Ju WK, Perkins GA, Kim KY, Bastola T, Choi WY, Choi SH. Glaucomatous optic neuropathy: Mitochondrial dynamics, dysfunction and protection in retinal ganglion cells. Prog Retin Eye Res 2023; 95:101136. [PMID: 36400670 DOI: 10.1016/j.preteyeres.2022.101136] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 10/04/2022] [Accepted: 11/03/2022] [Indexed: 11/18/2022]
Abstract
Glaucoma is a leading cause of irreversible blindness worldwide and is characterized by a slow, progressive, and multifactorial degeneration of retinal ganglion cells (RGCs) and their axons, resulting in vision loss. Despite its high prevalence in individuals 60 years of age and older, the causing factors contributing to glaucoma progression are currently not well characterized. Intraocular pressure (IOP) is the only proven treatable risk factor. However, lowering IOP is insufficient for preventing disease progression. One of the significant interests in glaucoma pathogenesis is understanding the structural and functional impairment of mitochondria in RGCs and their axons and synapses. Glaucomatous risk factors such as IOP elevation, aging, genetic variation, neuroinflammation, neurotrophic factor deprivation, and vascular dysregulation, are potential inducers for mitochondrial dysfunction in glaucoma. Because oxidative phosphorylation stress-mediated mitochondrial dysfunction is associated with structural and functional impairment of mitochondria in glaucomatous RGCs, understanding the underlying mechanisms and relationship between structural and functional alterations in mitochondria would be beneficial to developing mitochondria-related neuroprotection in RGCs and their axons and synapses against glaucomatous neurodegeneration. Here, we review the current studies focusing on mitochondrial dynamics-based structural and functional alterations in the mitochondria of glaucomatous RGCs and therapeutic strategies to protect RGCs against glaucomatous neurodegeneration.
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Affiliation(s)
- Won-Kyu Ju
- Hamilton Glaucoma Center and Viterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, CA, 92093, USA.
| | - Guy A Perkins
- National Center for Microscopy and Imaging Research, Department of Neurosciences, University of California San Diego, La Jolla, CA, 92093, USA
| | - Keun-Young Kim
- National Center for Microscopy and Imaging Research, Department of Neurosciences, University of California San Diego, La Jolla, CA, 92093, USA
| | - Tonking Bastola
- Hamilton Glaucoma Center and Viterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, CA, 92093, USA
| | - Woo-Young Choi
- Hamilton Glaucoma Center and Viterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, CA, 92093, USA; Department of Plastic Surgery, College of Medicine, Chosun University, Gwang-ju, South Korea
| | - Soo-Ho Choi
- Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
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4
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Li M, Gong S, Han X, Zhou L, Zhang S, Ren Q, Cai X, Luo Y, Liu W, Zhu Y, Zhou X, Li Y, Ji L. Contribution of mitochondrial gene variants in diabetes and diabetic kidney disease. Front Endocrinol (Lausanne) 2022; 13:953631. [PMID: 36313763 PMCID: PMC9597463 DOI: 10.3389/fendo.2022.953631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 08/04/2022] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES Mitochondrial DNA (mtDNA) plays an important role in the pathogenesis of diabetes. Variants in mtDNA have been reported in diabetes, but studies on the whole mtDNA variants were limited. Our study aims to explore the association of whole mtDNA variants with diabetes and diabetic kidney disease (DKD). METHODS The whole mitochondrial genome was screened by next-generation sequencing in cohort 1 consisting of 50 early-onset diabetes (EOD) patients with a maternally inherited diabetes (MID) family history. A total of 42 variants possibly associated with mitochondrial diseases were identified according to the filtering strategy. These variants were sequenced in cohort 2 consisting of 90 EOD patients with MID. The association between the clinical phenotype and these variants was analyzed. Then, these variants were genotyped in cohort 3 consisting of 1,571 type 2 diabetes mellitus patients and 496 subjects with normal glucose tolerance (NGT) to analyze the association between variants with diabetes and DKD. RESULTS Patients with variants in the non-coding region had a higher percentage of obesity and levels of fasting insulin (62.1% vs. 24.6%, P = 0.001; 80.0% vs. 26.5% P < 0.001). The patients with the variants in rRNA had a higher prevalence of obesity (71.4% vs. 30.3%, P = 0.007), and the patients with the variants in mitochondrial complex I had a higher percentage of the upper tertile of FINS (64.3% vs. 34.3%, P = 0.049). Among 20 homogeneous variants successfully captured, two known variants (m.A3943G, m.A10005G) associated with other mitochondrial diseases were only in the diabetic group, but not in the NGT group, which perhaps indicated its possible association with diabetes. The prevalence of DKD was significantly higher in the group with the 20 variants than those without these variants (18.7% vs. 14.6%, P = 0.049) in the participants with diabetes of cohort 3. CONCLUSION MtDNA variants are associated with MID and DKD, and our findings advance our understanding of mtDNA in diabetes and DKD. It will have important implications for the individual therapy of mitochondrial diabetes.
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Affiliation(s)
- Meng Li
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Siqian Gong
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Xueyao Han
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Lingli Zhou
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Simin Zhang
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Qian Ren
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Xiaoling Cai
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Yingying Luo
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Wei Liu
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Yu Zhu
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Xianghai Zhou
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
| | - Yufeng Li
- Department of Endocrinology, Pinggu Teaching Hospital, Capital Medical University, Beijing, China
| | - Linong Ji
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Peking University Diabetes Center, Beijing, China
- *Correspondence: Linong Ji,
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5
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Wang Y, Zhao G, Fang Z, Pan H, Zhao Y, Wang Y, Zhou X, Wang X, Luo T, Zhang Y, Wang Z, Chen Q, Dong L, Huang Y, Zhou Q, Xia L, Li B, Guo J, Xia K, Tang B, Li J. Genetic landscape of human mitochondrial genome using whole genome sequencing. Hum Mol Genet 2021; 31:1747-1761. [PMID: 34897451 DOI: 10.1093/hmg/ddab358] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/26/2021] [Accepted: 12/07/2021] [Indexed: 11/12/2022] Open
Abstract
Increasing evidences suggest that mitochondrial dysfunction is implicated in diseases and aging, and whole-genome sequencing (WGS) is the most unbiased method in analyzing the mitochondrial genome (mtDNA). However, the genetic landscape of mtDNA in the Chinese population has not been fully examined. Here, we described the genetic landscape of mtDNA using WGS data from Chinese individuals (n = 3241). We identified 3892 mtDNA variants, of which 3349 (86%) were rare variants. Interestingly, we observed a trend toward extreme heterogeneity of mtDNA variants. Our study observed a distinct purifying selection on mtDNA, which inhibits the accumulation of harmful heteroplasmies at the individual level: (1) mitochondrial dN/dS ratios were much less than 1; (2) the dN/dS ratio of heteroplasmies was higher than homoplasmies; (3) heteroplasmies had more indels and predicted deleterious variants than homoplasmies. Furthermore, we found that haplogroup M (20.27%) and D (20.15%) had the highest frequencies in the Chinese population, followed by B (18.51%) and F (16.45%). The number of variants per individual differed across haplogroup groups, with a higher number of homoplasmies for the M lineage. Meanwhile, mtDNA copy number was negatively correlated with age but positively correlated with the female sex. Finally, we developed an mtDNA variation database of Chinese populations called MTCards (http://genemed.tech/mtcards/) to facilitate the query of mtDNA variants in this study. In summary, these findings contribute to different aspects of understanding mtDNA, providing a better understanding of the genetic basis of mitochondrial-related diseases.
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Affiliation(s)
- Yijing Wang
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
| | - Guihu Zhao
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Zhenghuan Fang
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
| | - Hongxu Pan
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Yuwen Zhao
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Yige Wang
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Xun Zhou
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Xiaomeng Wang
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
| | - Tengfei Luo
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
| | - Yi Zhang
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Zheng Wang
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Qian Chen
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Lijie Dong
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
| | - Yuanfeng Huang
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Qiao Zhou
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Lu Xia
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
| | - Bin Li
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Jifeng Guo
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Kun Xia
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
| | - Beisha Tang
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Jinchen Li
- National Clinical Research Center for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China.,Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China
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6
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Maalej M, Kammoun F, Kharrat M, Bouchaala W, Ammar M, Mkaouar-Rebai E, Triki C, Fakhfakh F. A first description of ataxia with vitamin E deficiency associated with MT-TG gene mutation. Acta Neurol Belg 2021; 121:1733-1740. [PMID: 32979145 DOI: 10.1007/s13760-020-01490-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 09/04/2020] [Indexed: 11/26/2022]
Abstract
Ataxia with isolated vitamin E deficiency (AVED) is a rare autosomal recessive cerebellar ataxia disorder that is caused by a mutation in the alpha-tocopherol transfer protein gene TTPA, leading to a lower level of serum vitamin E. Although it is almost clinically similar to Friedreich's ataxia, its devastating neurological features can be prevented with appropriate treatment. In this study, we present a patient who was initially diagnosed with Friedreich's ataxia, but was later found to have AVED. Frataxin gene screening revealed the absence of GAA expansion in homozygous or heterozygous state. However, TTPAgene sequencing showed the presence of the c.744delA mutation, leading to a premature stop codon (p.E249fx). In addition, the result of mutational analysis of MT-DNA genes revealed the presence of several variants, including the m.10044A>G mutation in MT-TG gene. Here, we report for the first time the coexistence of both mitochondrial and nuclear genes mutations in AVED.
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Affiliation(s)
- Marwa Maalej
- Laboratory of Molecular and Functional Genetics, Faculty of Science of Sfax, Sfax, Tunisia.
| | - Fatma Kammoun
- Unit of Pediatric Neurology research (UR12ES 16), C.H.U. Hedi Chaker, Sfax, Tunisia
| | - Marwa Kharrat
- Laboratory of Molecular and Functional Genetics, Faculty of Science of Sfax, Sfax, Tunisia
| | - Wafa Bouchaala
- Unit of Pediatric Neurology research (UR12ES 16), C.H.U. Hedi Chaker, Sfax, Tunisia
| | - Marwa Ammar
- Laboratory of Molecular and Functional Genetics, Faculty of Science of Sfax, Sfax, Tunisia
| | - Emna Mkaouar-Rebai
- Laboratory of Molecular and Functional Genetics, Faculty of Science of Sfax, Sfax, Tunisia
| | - Chahnez Triki
- Unit of Pediatric Neurology research (UR12ES 16), C.H.U. Hedi Chaker, Sfax, Tunisia
| | - Faiza Fakhfakh
- Laboratory of Molecular and Functional Genetics, Faculty of Science of Sfax, Sfax, Tunisia.
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7
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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] [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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8
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Mitonuclear interactions influence multiple sclerosis risk. Gene 2020; 758:144962. [DOI: 10.1016/j.gene.2020.144962] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 06/28/2020] [Accepted: 07/13/2020] [Indexed: 12/16/2022]
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9
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Jiang W, Li R, Zhang Y, Wang P, Wu T, Lin J, Yu J, Gu M. Mitochondrial DNA Mutations Associated with Type 2 Diabetes Mellitus in Chinese Uyghur Population. Sci Rep 2017; 7:16989. [PMID: 29208909 PMCID: PMC5717000 DOI: 10.1038/s41598-017-17086-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 11/21/2017] [Indexed: 12/29/2022] Open
Abstract
A hospital-based case-control study was conducted to investigate potential association between mitochondrial DNA and Type 2 diabetes mellitus (T2DM) in Chinese Uyghur population. We sequenced mitochondrial DNA from 210 Uyghur individuals including 88 T2DM patients and 122 controls. Using haplogroup classification and association test, we found that haplogroup H (odds ratio [OR] = 1.40; 95% confidence interval [CI]: 1.20–1.64; P = 0.0005138) and D4 (odds ratio = 1.47; 95% CI: 1.22–1.77; P = 0.001064) were associated with an increased risk of T2DM in Chinese Uyghur population. Two markers of haplogroup D4 and H, MT-ATP8 m.8414 T > G (p.Leu17Phe) and m.2706 G > A encoding 16S rRNA in mitochondria, were predicted to affect the structure of MT-ATP8 and 16S RNA, respectively, and may be involved in the pathogenesis of T2DM. Our study provides a new clue for mitochondrial DNA in the etiology of T2DM in Chinese Uyghur population.
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Affiliation(s)
- Wenxi Jiang
- Department of Medicine, The Fifth Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang Autonomous Region, 830000, P.R. China
| | - Ronghui Li
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, P.R. China
| | - Yongbiao Zhang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, P.R. China
| | - Panpan Wang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, P.R. China
| | - Tingting Wu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, P.R. China
| | - Jinming Lin
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, P.R. China
| | - Jun Yu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, P.R. China.,Joint Laboratory for Translational Medicine Research, Beijing Institute of Genomics, Chinese Academy of Sciences & Liaocheng People's Hospital, Liaocheng, 252000, Shandong Province, P.R. China
| | - Mingliang Gu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, P.R. China. .,Joint Laboratory for Translational Medicine Research, Beijing Institute of Genomics, Chinese Academy of Sciences & Liaocheng People's Hospital, Liaocheng, 252000, Shandong Province, P.R. China.
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10
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Identification and analysis of mtDNA genomes attributed to Finns reveal long-stagnant demographic trends obscured in the total diversity. Sci Rep 2017; 7:6193. [PMID: 28733587 PMCID: PMC5522469 DOI: 10.1038/s41598-017-05673-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 06/01/2017] [Indexed: 01/08/2023] Open
Abstract
In Europe, modern mitochondrial diversity is relatively homogeneous and suggests an ubiquitous rapid population growth since the Neolithic revolution. Similar patterns also have been observed in mitochondrial control region data in Finland, which contrasts with the distinctive autosomal and Y-chromosomal diversity among Finns. A different picture emerges from the 843 whole mitochondrial genomes from modern Finns analyzed here. Up to one third of the subhaplogroups can be considered as Finn-characteristic, i.e. rather common in Finland but virtually absent or rare elsewhere in Europe. Bayesian phylogenetic analyses suggest that most of these attributed Finnish lineages date back to around 3,000–5,000 years, coinciding with the arrival of Corded Ware culture and agriculture into Finland. Bayesian estimation of past effective population sizes reveals two differing demographic histories: 1) the ‘local’ Finnish mtDNA haplotypes yielding small and dwindling size estimates for most of the past; and 2) the ‘immigrant’ haplotypes showing growth typical of most European populations. The results based on the local diversity are more in line with that known about Finns from other studies, e.g., Y-chromosome analyses and archaeology findings. The mitochondrial gene pool thus may contain signals of local population history that cannot be readily deduced from the total diversity.
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11
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Friederich MW, Erdogan AJ, Coughlin CR, Elos MT, Jiang H, O’Rourke CP, Lovell MA, Wartchow E, Gowan K, Chatfield KC, Chick WS, Spector EB, Van Hove JL, Riemer J. Mutations in the accessory subunit NDUFB10 result in isolated complex I deficiency and illustrate the critical role of intermembrane space import for complex I holoenzyme assembly. Hum Mol Genet 2017; 26:702-716. [PMID: 28040730 PMCID: PMC6251674 DOI: 10.1093/hmg/ddw431] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/27/2016] [Accepted: 12/16/2016] [Indexed: 12/17/2022] Open
Abstract
An infant presented with fatal infantile lactic acidosis and cardiomyopathy, and was found to have profoundly decreased activity of respiratory chain complex I in muscle, heart and liver. Exome sequencing revealed compound heterozygous mutations in NDUFB10, which encodes an accessory subunit located within the PD part of complex I. One mutation resulted in a premature stop codon and absent protein, while the second mutation replaced the highly conserved cysteine 107 with a serine residue. Protein expression of NDUFB10 was decreased in muscle and heart, and less so in the liver and fibroblasts, resulting in the perturbed assembly of the holoenzyme at the 830 kDa stage. NDUFB10 was identified together with three other complex I subunits as a substrate of the intermembrane space oxidoreductase CHCHD4 (also known as Mia40). We found that during its mitochondrial import and maturation NDUFB10 transiently interacts with CHCHD4 and acquires disulfide bonds. The mutation of cysteine residue 107 in NDUFB10 impaired oxidation and efficient mitochondrial accumulation of the protein and resulted in degradation of non-imported precursors. Our findings indicate that mutations in NDUFB10 are a novel cause of complex I deficiency associated with a late stage assembly defect and emphasize the role of intermembrane space proteins for the efficient assembly of complex I.
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Affiliation(s)
- Marisa W. Friederich
- Department of Pediatrics, Section of Clinical Genetics and Metabolism, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Alican J. Erdogan
- Department of Chemistry, Institute of Biochemistry, University of Cologne, Cologne, Germany
| | - Curtis R. Coughlin
- Department of Pediatrics, Section of Clinical Genetics and Metabolism, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Mihret T. Elos
- Department of Pediatrics, Section of Clinical Genetics and Metabolism, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Hua Jiang
- Department of Pediatrics, Section of Clinical Genetics and Metabolism, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Courtney P. O’Rourke
- Department of Pediatrics, Section of Clinical Genetics and Metabolism, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Mark A. Lovell
- Department of Pathology, University of Colorado, Aurora, CO, USA
- Department of Pathology, Children’s Hospital of Colorado, Aurora, CO, USA
| | - Eric Wartchow
- Department of Pathology, University of Colorado, Aurora, CO, USA
- Department of Pathology, Children’s Hospital of Colorado, Aurora, CO, USA
| | - Katherine Gowan
- Department of Biochemistry and Molecular Genetics, University of Colorado, Aurora, CO, USA
| | - Kathryn C. Chatfield
- Department of Pediatrics, Section of Cardiology, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Wallace S. Chick
- Department of Cell and Developmental Biology, University of Colorado, Aurora, CO, USA
| | - Elaine B. Spector
- Department of Pediatrics, Section of Clinical Genetics and Metabolism, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Johan L.K. Van Hove
- Department of Pediatrics, Section of Clinical Genetics and Metabolism, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Jan Riemer
- Department of Chemistry, Institute of Biochemistry, University of Cologne, Cologne, Germany
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12
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Soini HK, Väisänen A, Kärppä M, Hinttala R, Kytövuori L, Moilanen JS, Uusimaa J, Majamaa K. A novel MTTT mutation m.15933G > A revealed in analysis of mitochondrial DNA in patients with suspected mitochondrial disease. BMC MEDICAL GENETICS 2017; 18:14. [PMID: 28187756 PMCID: PMC5303298 DOI: 10.1186/s12881-017-0377-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 02/03/2017] [Indexed: 01/25/2023]
Abstract
Background Mitochondrial diseases present with variable multi-organ symptoms. Common disease-causing mutations in mitochondrial DNA (mtDNA) are regularly screened in diagnostic work-up, but novel mutations may remain unnoticed. Methods Patients (N = 66) with a clinical suspicion of mitochondrial disease were screened for their mtDNA coding region using conformation sensitive gel electrophoresis and sequencing. Long-PCR was used to detect deletions followed by POLG1 sequencing in patients with multiple deletions. Results We discovered three novel mtDNA variants that included m.8743G > C, m.11322A > G and m.15933G > A. The novel MTTT variant m.15933G > A is suggested to be pathogenic. Analysis revealed also multiple mtDNA deletions in two patients and five nonsynonymous variants that were putatively pathogenic according to in-silico prediction algorithms. In addition, a rare haplogroup H associated m.7585_7586insT variant was discovered. Conclusions Among patients with a suspected mitochondrial disease, a novel MTTT variant m.15933G > A was discovered and is suggested to be pathogenic. In addition, several putatively pathogenic nonsynonymous variants and rare variants were found. These findings highlight the importance of coding region mtDNA screening among patients with clinical features suggesting a mitochondrial disease, but who lack the common mitochondrial disease mutations.
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Affiliation(s)
- Heidi K Soini
- Research Unit of Clinical Neuroscience, Neurology, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland. .,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland. .,Department of Neurology, Oulu University Hospital, P.O. Box 20, FI-90029 OYS, Oulu, Finland. .,PEDEGO Research Unit, Pediatrics, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.
| | - Antti Väisänen
- Research Unit of Clinical Neuroscience, Neurology, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Department of Neurology, Oulu University Hospital, P.O. Box 20, FI-90029 OYS, Oulu, Finland
| | - Mikko Kärppä
- Research Unit of Clinical Neuroscience, Neurology, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Department of Neurology, Oulu University Hospital, P.O. Box 20, FI-90029 OYS, Oulu, Finland
| | - Reetta Hinttala
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,PEDEGO Research Unit, Pediatrics, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Department of Pediatrics, Oulu University Hospital, P.O. Box 23, FI-90029 OYS, Oulu, Finland
| | - Laura Kytövuori
- Research Unit of Clinical Neuroscience, Neurology, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Department of Neurology, Oulu University Hospital, P.O. Box 20, FI-90029 OYS, Oulu, Finland
| | - Jukka S Moilanen
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Department of Clinical Genetics, Oulu University Hospital, P.O. Box 23, FI-90029 OYS, Oulu, Finland.,PEDEGO Research Unit, Clinical Genetics, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland
| | - Johanna Uusimaa
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,PEDEGO Research Unit, Pediatrics, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Department of Pediatrics, Oulu University Hospital, P.O. Box 23, FI-90029 OYS, Oulu, Finland
| | - Kari Majamaa
- Research Unit of Clinical Neuroscience, Neurology, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland.,Department of Neurology, Oulu University Hospital, P.O. Box 20, FI-90029 OYS, Oulu, Finland
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13
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Charoute H, Kefi R, Bounaceur S, Benrahma H, Reguig A, Kandil M, Rouba H, Bakhchane A, Abdelhak S, Barakat A. Novel variants of mitochondrial DNA associated with Type 2 diabetes mellitus in Moroccan population. Mitochondrial DNA A DNA Mapp Seq Anal 2016; 29:9-13. [PMID: 27728995 DOI: 10.1080/24701394.2016.1233530] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In this study, we investigated the association of mtDNA variants and haplogroups with Type 2 diabetes (T2D) in Moroccan patients. The Hypervariable Segments 1 of the mtDNA was sequenced in 108 diabetic patients and 97 controls. Association analyses were performed using Fisher's exact test and multivariate logistic regression. The prevalence of five mtDNA variants (C16187T, C16270T, T16172C, A16293G, and C16320T) was significantly higher in cases than in controls. Among these variants, only C16270T (p = .02) and C16320T (p = .03) remains significant after adjusting by age and gender. We showed that C16270T and C16320T variants were strongly associated with increased risk of T2D in Moroccan patients.
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Affiliation(s)
- Hicham Charoute
- a Institut Pasteur, Human Molecular Genetic Laboratory , Casablanca , Morocco
| | - Rym Kefi
- b Biomedical Genomics and Oncogenetics Laboratory (LR 11 IPT 05) , Institut Pasteur de Tunis, Université de Tunis El Manar , Tunis , Tunisia
| | - Safaa Bounaceur
- a Institut Pasteur, Human Molecular Genetic Laboratory , Casablanca , Morocco
| | - Houda Benrahma
- a Institut Pasteur, Human Molecular Genetic Laboratory , Casablanca , Morocco
| | - Ahmed Reguig
- a Institut Pasteur, Human Molecular Genetic Laboratory , Casablanca , Morocco
| | - Mostafa Kandil
- c Equipe d'Anthropogénétique et Biotechnologies, Faculté des Sciences , Université Chouaïb Doukkali , El Jadida , Morocco
| | - Hassan Rouba
- a Institut Pasteur, Human Molecular Genetic Laboratory , Casablanca , Morocco
| | - Amina Bakhchane
- a Institut Pasteur, Human Molecular Genetic Laboratory , Casablanca , Morocco
| | - Sonia Abdelhak
- b Biomedical Genomics and Oncogenetics Laboratory (LR 11 IPT 05) , Institut Pasteur de Tunis, Université de Tunis El Manar , Tunis , Tunisia
| | - Abdelhamid Barakat
- a Institut Pasteur, Human Molecular Genetic Laboratory , Casablanca , Morocco
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14
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Vestiges of an Ancient Border in the Contemporary Genetic Diversity of North-Eastern Europe. PLoS One 2015; 10:e0130331. [PMID: 26132657 PMCID: PMC4488853 DOI: 10.1371/journal.pone.0130331] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Accepted: 05/19/2015] [Indexed: 11/25/2022] Open
Abstract
It has previously been demonstrated that the advance of the Neolithic Revolution from the Near East through Europe was decelerated in the northernmost confines of the continent, possibly as a result of space and resource competition with lingering Mesolithic populations. Finland was among the last domains to adopt a farming lifestyle, and is characterized by substructuring in the form of a distinct genetic border dividing the northeastern and southwestern regions of the country. To explore the origins of this divergence, the geographical patterns of mitochondrial and Y-chromosomal haplogroups of Neolithic and Mesolithic ancestry were assessed in Finnish populations. The distribution of these uniparental markers revealed a northeastern bias for hunter-gatherer haplogroups, while haplogroups associated with the farming lifestyle clustered in the southwest. In addition, a correlation could be observed between more ancient mitochondrial haplogroup age and eastern concentration. These results coupled with prior archeological evidence suggest the genetic northeast/southwest division observed in contemporary Finland represents an ancient vestigial border between Mesolithic and Neolithic populations undetectable in most other regions of Europe.
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15
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Muktabhant B, Sanchaisuriya P, Trakulwong M, Mingchai R, Schelp FP. A first-degree relative with diabetes mellitus is an important risk factor for rural Thai villagers to develop type 2 diabetes mellitus. Asia Pac J Public Health 2014; 27:385-93. [PMID: 25380670 DOI: 10.1177/1010539514555861] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The screening of 609 villagers in rural areas of northeastern Thailand resulted in the detection of 110 (18.1%) new cases of type 2 diabetes (T2DM). The diagnoses were made on the basis of a glycated hemoglobin (HbA1c) value ≤ 6.5%. Among all those screened, 243 (40%) reported having a father or mother with T2DM. Among the new cases, 66 (60%) reported a first-degree relative, predominantly their mothers, who had the disease. Together with age and the body mass index, a mother or father with DM was strong risk factor for the development of T2DM (adjusted odds ratio = 2.9, 95% confidence interval = 1.84-4.57) when compared with the absence of a first-degree relative with DM. It is concluded that family history of a first-degree relative is an important additional information that might improve the validity of the screening procedure.
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Affiliation(s)
| | | | | | - Rumpai Mingchai
- Na Klang Hospital, Na Klang, Nong Bua Lamphu Province, Thailand
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16
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Mitchell SL, Goodloe R, Brown-Gentry K, Pendergrass SA, Murdock DG, Crawford DC. Characterization of mitochondrial haplogroups in a large population-based sample from the United States. Hum Genet 2014; 133:861-8. [PMID: 24488180 DOI: 10.1007/s00439-014-1421-9] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 01/15/2014] [Indexed: 10/25/2022]
Abstract
Mitochondrial DNA (mtDNA) haplogroups are valuable for investigations in forensic science, molecular anthropology, and human genetics. In this study, we developed a custom panel of 61 mtDNA markers for high-throughput classification of European, African, and Native American/Asian mitochondrial haplogroup lineages. Using these mtDNA markers, we constructed a mitochondrial haplogroup classification tree and classified 18,832 participants from the National Health and Nutrition Examination Surveys (NHANES). To our knowledge, this is the largest study to date characterizing mitochondrial haplogroups in a population-based sample from the United States, and the first study characterizing mitochondrial haplogroup distributions in self-identified Mexican Americans separately from Hispanic Americans of other descent. We observed clear differences in the distribution of maternal genetic ancestry consistent with proposed admixture models for these subpopulations, underscoring the genetic heterogeneity of the United States Hispanic population. The mitochondrial haplogroup distributions in the other self-identified racial/ethnic groups within NHANES were largely comparable to previous studies. Mitochondrial haplogroup classification was highly concordant with self-identified race/ethnicity (SIRE) in non-Hispanic whites (94.8 %), but was considerably lower in admixed populations including non-Hispanic blacks (88.3 %), Mexican Americans (81.8 %), and other Hispanics (61.6 %), suggesting SIRE does not accurately reflect maternal genetic ancestry, particularly in populations with greater proportions of admixture. Thus, it is important to consider inconsistencies between SIRE and genetic ancestry when performing genetic association studies. The mitochondrial haplogroup data that we have generated, coupled with the epidemiologic variables in NHANES, is a valuable resource for future studies investigating the contribution of mtDNA variation to human health and disease.
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Affiliation(s)
- Sabrina L Mitchell
- Department of Molecular Physiology and Biophysics, Center for Human Genetics Research, Vanderbilt University, 2215 Garland Avenue, 519 Light Hall, Nashville, Tennessee, USA,
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17
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Maalej M, Mkaouar-Rebai E, Mnif M, Mezghani N, Ben Ayed I, Chamkha I, Abid M, Fakhfakh F. A mitochondrial implication in a Tunisian patient with Friedreich's ataxia-like. PATHOLOGIE-BIOLOGIE 2014; 62:41-8. [PMID: 24011957 DOI: 10.1016/j.patbio.2013.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Accepted: 07/05/2013] [Indexed: 06/02/2023]
Abstract
Genes encoding the DNA helicase TWINKLE (C10orf2) or the two subunits of mtDNA polymerase γ (POLγ) (POLG1 and POLG2) have a direct effect on the mitochondrial DNA replication machinery and were reported in many mitochondrial disorders. Friedreich's ataxia (FRDA) is the common cause of ataxia often associated with the expansion of a GAA repeat in intron 1 of the frataxin gene (FXN). Mitochondrial DNA could be considered as a candidate modifier factor for FRDA disease, since mitochondrial oxidative stress is thought to be involved in the pathogenesis of this disease. We screened the FXN, POLG1 and C10orf2 genes in a Tunisian patient with clinical features of Friedreich's ataxia-like. The results showed the absence of the expansion of a GAA triplet repeat in intron 1 of the FXN gene. Besides, the sequencing of all the exons and their flanking regions of the FXN, POLG1 and C10orf2 genes revealed the presence of intronic polymorphisms. In addition, screening of the mtDNA revealed the presence of several mitochondrial known variations and the absence of mitochondrial deletions in this patient. The detected m.16187C>T and the m.16189T>C change the order of the homopolymeric tract of cytosines between 16184 and 16193 in the mitochondrial D-loop and could lead to a mitochondrial dysfunction by inhibiting replication and affecting protein involved in the replication process of the mtDNA which could be responsible for the clinical features of Friedreich ataxia observed in the studied patient.
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Affiliation(s)
- M Maalej
- Laboratoire de génétique moléculaire humaine, faculté de médecine de Sfax, avenue Magida Boulila, 3029 Sfax, Tunisia
| | - E Mkaouar-Rebai
- Laboratoire de génétique moléculaire humaine, faculté de médecine de Sfax, avenue Magida Boulila, 3029 Sfax, Tunisia.
| | - M Mnif
- Service d'endocrinologie, CHU Hédi Chaker de Sfax, avenue Magida Boulila, 3029 Sfax, Tunisia
| | - N Mezghani
- Laboratoire de génétique moléculaire humaine, faculté de médecine de Sfax, avenue Magida Boulila, 3029 Sfax, Tunisia
| | - I Ben Ayed
- Laboratoire de génétique moléculaire humaine, faculté de médecine de Sfax, avenue Magida Boulila, 3029 Sfax, Tunisia
| | - I Chamkha
- Laboratoire de génétique moléculaire humaine, faculté de médecine de Sfax, avenue Magida Boulila, 3029 Sfax, Tunisia
| | - M Abid
- Service d'endocrinologie, CHU Hédi Chaker de Sfax, avenue Magida Boulila, 3029 Sfax, Tunisia
| | - F Fakhfakh
- Laboratoire de génétique moléculaire humaine, faculté de médecine de Sfax, avenue Magida Boulila, 3029 Sfax, Tunisia
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Barton JC, Barton JC, Acton RT. Diabetes in first-degree family members: a predictor of type 2 diabetes in 159 nonscreening Alabama hemochromatosis probands with HFE C282Y homozygosity. Diabetes Care 2014; 37:259-66. [PMID: 23990522 DOI: 10.2337/dc13-0713] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE We sought to identify predictors of diabetes diagnosed before hemochromatosis. RESEARCH DESIGN AND METHODS We studied these 16 variables in 159 nonscreening hemochromatosis probands with HFE C282Y homozygosity: age; sex; BMI; diabetes reports in first-degree family members (dichotomous); heavy ethanol consumption; cigarette smoking; elevated serum alanine aminotransferase/aspartate aminotransferase levels; nonalcoholic fatty liver; chronic viral hepatitis; cirrhosis; hand arthropathy; iron removed by phlebotomy; and positivity for HLA-A*01, B*08; A*03, B*07; and A*03, B*14 haplotypes. We performed univariable and multivariable analyses. RESULTS Twenty-three probands (14.5%) had diabetes; 19 were men. Each of the 23 probands had type 2 diabetes. Mean BMI was greater in probands with diabetes (31.7 ± 8.5 [SD] kg/m(2) vs. 27.6 ± 5.1 kg/m(2); P = 0.032). Reports of any first-degree family member with diabetes were more prevalent in probands with than in probands without diabetes (69.6 vs. 17.6%; P < 0.0001). In probands with diabetes, the odds ratio (OR) of maternal diabetes was 6.7 (95% CI 2.3-19.7; P = 0.0005) and of sibling diabetes was 11.7 (3.0-45.5; P = 0.0004). In a logistic regression model, predictors of diabetes at hemochromatosis diagnosis in 159 probands were diabetes reports in family members (OR 8.5 [95% CI 2.9-24.8]; P < 0.0001) and BMI (1.1 [1.0-1.2]; P = 0.049). This model explained 26.0% of total deviance contributing to diabetes. CONCLUSIONS In nonscreening hemochromatosis probands with HFE C282Y homozygosity, a heritable factor(s) increases the risk of diabetes diagnosed before hemochromatosis.
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Adeva M, González-Lucán M, Seco M, Donapetry C. Enzymes involved in l-lactate metabolism in humans. Mitochondrion 2013; 13:615-29. [DOI: 10.1016/j.mito.2013.08.011] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 07/29/2013] [Accepted: 08/30/2013] [Indexed: 12/20/2022]
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Soini HK, Moilanen JS, Vilmi-Kerälä T, Finnilä S, Majamaa K. Mitochondrial DNA variant m.15218A > G in Finnish epilepsy patients who have maternal relatives with epilepsy, sensorineural hearing impairment or diabetes mellitus. BMC MEDICAL GENETICS 2013; 14:73. [PMID: 23870133 PMCID: PMC3726289 DOI: 10.1186/1471-2350-14-73] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Accepted: 07/17/2013] [Indexed: 01/04/2023]
Abstract
BACKGROUND Mitochondrial diseases caused by mutations in mitochondrial DNA (mtDNA) affect tissues with high energy demand. Epilepsy is one of the manifestations of mitochondrial dysfunction when the brain is affected. We have studied here 79 Finnish patients with epilepsy and who have maternal first- or second-degree relatives with epilepsy, sensorineural hearing impairment or diabetes mellitus. METHODS The entire mtDNA was studied by using conformation sensitive gel electrophoresis and PCR fragments that differed in mobility were directly sequenced. RESULTS We found a common nonsynonymous variant m.15218A > G (p.T158A, MTCYB) that occurs in haplogroup U5a1 to be more frequent in patients with epilepsy. The m.15218A > G variant was present in five patients with epilepsy and in four out of 403 population controls (p = 0.0077). This variant was present in two branches in the phylogenetic network constructed on the basis of mtDNA variation among the patients. Three algorithms predicted that m.15218A > G is damaging in effect. CONCLUSIONS We suggest that the m.15218A > G variant is mildly deleterious and that mtDNA involvement should be considered in patients with epilepsy and who have a maternal history of epilepsy, sensorineural hearing impairment or diabetes mellitus.
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Affiliation(s)
- Heidi K Soini
- Department of Neurology, Oulu University Hospital, P.O. Box 20, Oulu FI-90029, OYS, Finland
- Department of Clinical Medicine, Neurology, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland
- Clinical Research Center, Oulu University Hospital, P.O. Box 5000, FI-90014, Oulu, Finland
| | - Jukka S Moilanen
- Department of Clinical Genetics, Oulu University Hospital and University of Oulu P.O. Box 23, FI-90029, OYS, Oulu, Finland
| | - Tiina Vilmi-Kerälä
- Department of Neurology, Oulu University Hospital, P.O. Box 20, Oulu FI-90029, OYS, Finland
- Department of Clinical Medicine, Neurology, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland
- Clinical Research Center, Oulu University Hospital, P.O. Box 5000, FI-90014, Oulu, Finland
| | - Saara Finnilä
- Department of Neurology, Oulu University Hospital, P.O. Box 20, Oulu FI-90029, OYS, Finland
- Department of Clinical Medicine, Neurology, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland
- Clinical Research Center, Oulu University Hospital, P.O. Box 5000, FI-90014, Oulu, Finland
| | - Kari Majamaa
- Department of Neurology, Oulu University Hospital, P.O. Box 20, Oulu FI-90029, OYS, Finland
- Department of Clinical Medicine, Neurology, University of Oulu, P.O. Box 5000, FI-90014, Oulu, Finland
- Clinical Research Center, Oulu University Hospital, P.O. Box 5000, FI-90014, Oulu, Finland
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