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Lombardo B, D'Argenio V, Monda E, Vitale A, Caiazza M, Sacchetti L, Pastore L, Limongelli G, Frisso G, Mazzaccara C. Genetic analysis resolves differential diagnosis of a familial syndromic dilated cardiomyopathy: A new case of Alström syndrome. Mol Genet Genomic Med 2020; 8:e1260. [PMID: 32396277 PMCID: PMC7336746 DOI: 10.1002/mgg3.1260] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/21/2020] [Accepted: 03/24/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Syndromic dilated cardiomyopathy (DCM) includes a group of complex disorders with a very heterogeneous genetic etiology, leading to delay in definitive diagnosis. Conversely, an early genetic diagnosis is very important in determining the disease course, the prognosis, and may guide personalized treatments and family counseling. METHODS We analyzed two brothers with a multisystemic disorder, including dilated cardiomyopathy, diabetes, bilateral neurosensorial hearing loss, and optic atrophy, using different genetic approaches, namely mitochondrial DNA sequencing, comparative genomic hybridization-array (a-CGH) and whole exome sequencing (WES). RESULTS Sequencing of the wide mitochondrial genome revealed, in both brothers, the known homoplasmic variant rs2853826 in the subunit 3 of the NADH dehydrogenase gene (MT-ND3), whose pathogenicity was conflicting. Comparative genomic hybridization-array analysis revealed in both patients and their father two heterozygous deletions in Phosphodiesterase 4d-Interacting Protein (PDE4DIP) and Protocadherin-related 15 (PCDH15) genes, respectively. The use of WES detected a pathogenetic mutation in ALMS1, enabling the definitive diagnosis of Alström syndrome. CONCLUSION We demonstrated how the diagnosis of a complex heterogeneous disease may be difficult, due to several overlapping manifestations and the possible interaction of more genetic variants that could lead to a more severe and complex phenotype. This paper strongly evidences how genomics is revolutionizing the diagnosis of rare complex disease, representing one of the most essential steps to enable a definitive diagnosis and to establish the etiology for diseases, such as syndromic DCM.
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Affiliation(s)
- Barbara Lombardo
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II", Naples, Italy.,CEINGE Advanced Biotechnologies, Naples, Italy
| | - Valeria D'Argenio
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II", Naples, Italy.,CEINGE Advanced Biotechnologies, Naples, Italy
| | - Emanuele Monda
- Department of Translational Medical Sciences, University of Campania 'Luigi Vanvitelli', Caserta, Italy.,Cardiomyopathies and Heart Failure Department, Monaldi Hospital, University of Campania 'Luigi Vanvitelli', Naples, Italy
| | - Andrea Vitale
- CEINGE Advanced Biotechnologies, Naples, Italy.,Department of Motor Science and Health, University of Naples, Parthenope, Naples, Italy
| | - Martina Caiazza
- Department of Translational Medical Sciences, University of Campania 'Luigi Vanvitelli', Caserta, Italy.,Cardiomyopathies and Heart Failure Department, Monaldi Hospital, University of Campania 'Luigi Vanvitelli', Naples, Italy
| | | | - Lucio Pastore
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II", Naples, Italy.,CEINGE Advanced Biotechnologies, Naples, Italy
| | - Giuseppe Limongelli
- Department of Translational Medical Sciences, University of Campania 'Luigi Vanvitelli', Caserta, Italy.,Cardiomyopathies and Heart Failure Department, Monaldi Hospital, University of Campania 'Luigi Vanvitelli', Naples, Italy
| | - Giulia Frisso
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II", Naples, Italy.,CEINGE Advanced Biotechnologies, Naples, Italy
| | - Cristina Mazzaccara
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II", Naples, Italy.,CEINGE Advanced Biotechnologies, Naples, Italy
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Lalrohlui F, Zohmingthanga J, Hruaii V, Kumar NS. Genomic profiling of mitochondrial DNA reveals novel complex gene mutations in familial type 2 diabetes mellitus individuals from Mizo ethnic population, Northeast India. Mitochondrion 2019; 51:7-14. [PMID: 31862415 DOI: 10.1016/j.mito.2019.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 11/12/2019] [Accepted: 12/05/2019] [Indexed: 01/07/2023]
Abstract
The variants reported for mitochondrial DNA (mtDNA) and type 2 diabetes (T2D) may not be accountable for the disease in certain other populations and the risk depends upon numerous factors which may include genetics, environment as well as ethnicity. This leads to a challenge in identifying, exploring and comparing the variants between diabetic cases and healthy controls in a remote unexplored tribal population. To study the possible contribution of mtDNA variants, we sequenced the entire mitochondrial genomes and the frequencies of mtSNPs, their association with familial T2D and the potential impact of non-synonymous substitutions on protein functions were determined. The mtSNP 8584 G > A (ATP6: A20T) was detected in 14.28% of the diabetic patients and none in the control groups. The mitochondrial ND3 variant 10398A > G was found to be significantly associated with the risk of T2D (OR = 9.489, 95% CI = 1.161-77.54, P value = 0.036). A novel Frame-shift substitution ND5: 81_81ins A at position 12,417 was observed in 53.57% of diabetic individuals. Majority of the variants lie in tRNA-Phe in the non-protein coding region of mtDNA for both diabetic cases and common cases. We concluded that mutations in the coding (synonymous or non-synonymous) and noncoding regions of the mitochondria might have contribution towards the development of T2D. Our study is the first to report the distinct mitochondrial variants which may be attributed to the susceptibility as well as development of type 2 diabetes in an ethnic tribe from northeast India.
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Affiliation(s)
- Freda Lalrohlui
- Department of Biotechnology, Mizoram University, Aizawl 796004, Mizoram, India
| | | | - Vanlal Hruaii
- Department of Medicine, Zoram Medical College, Aizawl 796005, Mizoram, India
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3
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Shi Q, Luan Q, Wang X, Cai Y. Correlation study on mtDNA polymorphisms as potential risk factors in aggressive periodontitis by NGS. Oral Dis 2019; 26:401-408. [PMID: 31715075 DOI: 10.1111/odi.13231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 10/11/2019] [Accepted: 11/06/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVES Using next-generation sequencing (NGS) to determine whether aggressive periodontitis is associated with specific mitochondrial polymorphisms. MATERIALS AND METHODS A total of 165 unrelated Han Chinese were enrolled in the study. We analyzed the mitochondrial DNA (mtDNA) in 97 patients with aggressive periodontitis and 68 healthy controls by NGS. The mitochondrial DNA was L-PCR-amplified and subsequently sequenced by an Illumina Genome Analyzer (NGS). Chi-square tests were used to assess the differences between the two groups. In cases of significant difference, multivariate logistic regression models were further used to analyze the association between mtDNA polymorphisms and aggressive periodontitis. RESULTS Significant association was observed between aggressive periodontitis and eight mitochondrial polymorphisms: "8860G-10400C" (OR = 2.828, p = .002), "8701A" (OR = 2.308, p = .005), "12705C-10398A" (OR = 2.683, p = .002), "9540C" (OR = 3.838, p = .001) and "10873T-15043G" (OR = 4.375, p = .001). CONCLUSIONS The pathogenesis of aggressive periodontitis is complicated, and its heredity is not well characterized. Our study was the first to use next-generation sequencing and found that 8860G-10400C, 8701A, 12705C-10398A, 9540C, and 10873T-15043G are associated with aggressive periodontitis in the Han Chinese population.
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Affiliation(s)
- Qiao Shi
- Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Qingxian Luan
- Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Xiaoxuan Wang
- Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Yu Cai
- Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China.,Central Laboratory, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
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4
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Whole sequence of the mitochondrial DNA genome of Kearns Sayre Syndrome patients: Identification of deletions and variants. Gene 2018; 688:171-181. [PMID: 30528267 DOI: 10.1016/j.gene.2018.11.085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 09/04/2018] [Accepted: 11/28/2018] [Indexed: 02/07/2023]
Abstract
Mitochondria both produce the energy of the cell as ATP via respiration and regulate cellular metabolism. Accordingly, any deletion or mutation in the mitochondrial DNA (mtDNA) may result in a disease. One of these diseases is Kearns Sayre syndrome (KSS), described for the first time in 1958, where different large-scale deletions of different sizes and at different positions have been reported in the mitochondrial genome of patients with similar clinical symptoms. In this study, sequences of the mitochondrial genome of three patients with clinic features of KSS were analyzed. Our results revealed the position, heteroplasmy percentage, size of deletions, and their haplogroups. Two patients contained deletions reported previously and one patient showed a new deletion not reported previously. These results display for the first time a systematic analysis of mtDNA variants in the whole mtDNA genome of patients with KSS to help to understand their association with the disease.
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5
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Sun GJ, He F, Yao HM, Han ZY, Lu WJ, Chen XJ, Wang ZB, Qiu CG. Assessment of mitochondrial DNA mutations in Chinese family with essential hypertension. Mitochondrial DNA A DNA Mapp Seq Anal 2016; 27:1740-1741. [PMID: 25242182 DOI: 10.3109/19401736.2014.961148] [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] [Indexed: 06/03/2023]
Abstract
Mitochondrial DNA (MtDNA) mutations played an important role in the development of essential hypertension. Mitochondrial tRNA point mutations, caused the failure in tRNA metabolism, responsible for the pathogenesis of this complex disease. In this study, we evaluated the possible role of the 4329C >G mutation in the clinical expression of hypertension in a Chinese family. Analysis of the complete mtDNA sequence variants showed that other mutations may play synergic roles in the phenotypic manifestation of hypertension. In addition, other potential pitfalls were also discussed in this context.
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Affiliation(s)
- Guo-Ju Sun
- a Department of Cardiology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan , P.R. China
| | - Fei He
- a Department of Cardiology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan , P.R. China
| | - Hai-Mu Yao
- a Department of Cardiology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan , P.R. China
| | - Zhan-Ying Han
- a Department of Cardiology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan , P.R. China
| | - Wen-Jie Lu
- a Department of Cardiology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan , P.R. China
| | - Xiao-Jie Chen
- a Department of Cardiology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan , P.R. China
| | - Zheng-Bin Wang
- a Department of Cardiology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan , P.R. China
| | - Chun-Guang Qiu
- a Department of Cardiology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan , P.R. China
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Mohideen AMSH, Dicks E, Parfrey P, Green R, Savas S. Mitochondrial DNA polymorphisms, its copy number change and outcome in colorectal cancer. BMC Res Notes 2015; 8:272. [PMID: 26116242 PMCID: PMC4482280 DOI: 10.1186/s13104-015-1250-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 06/17/2015] [Indexed: 12/14/2022] Open
Abstract
Background Mitochondrion is a small organelle inside the eukaryotic cells. It has its own genome (mtDNA) and encodes for proteins that are critical for energy production and cellular metabolism. Mitochondrial dysfunctions have been implicated in cancer progression and may be related to poor prognosis in cancer patients. In this study we hypothesized that genetic variations in mtDNA are associated with clinical outcome in colorectal cancer patients. Methods We tested the associations of six mtDNA polymorphisms [MitoT479C, MitoT491C, MitoT10035C, MitoA13781G, 10398 (A/G), and 16189 (T/C)] and the mtDNA copy number change with overall survival (OS) and disease-free survival (DFS) times. Two mtDNA polymorphisms were genotyped using the TaqMan® SNP genotyping technique and the genotypes for the remaining four mtDNA polymorphisms were obtained by the Illumina® HumanOmni1-Quad genome wide SNP genotyping platform in 536 patients. The mtDNA copy number change (in tumor tissues with respect to non-tumor tissues) was estimated using the quantitative real time polymerase chain reaction for 274 patients. Associations of these mtDNA variations with OS and DFS were tested using the Cox regression method. Results In both univariate and multivariable analyses, none of the six mtDNA polymorphisms were associated with OS or DFS. 39.6 and 60.4% of the patients had increased and decreased mtDNA copy number in their tumor tissues when compared to their non-tumor rectum or colon tissues, respectively. However, in contrast to previous findings, the change in the mtDNA copy number was associated with neither OS nor DFS in our patient cohort. Conclusions Our results suggest that the mitochondrial genetic markers investigated in this study are not associated with outcome in colorectal cancer. Electronic supplementary material The online version of this article (doi:10.1186/s13104-015-1250-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Asan Meera Sahib Haja Mohideen
- Discipline of Genetics, Faculty of Medicine, Memorial University of Newfoundland, 300 Prince Philip Drive, HSC, Room H4333, St. John's, NL, A1B 3V6, Canada.
| | - Elizabeth Dicks
- Clinical Epidemiology Unit, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada.
| | - Patrick Parfrey
- Clinical Epidemiology Unit, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada.
| | - Roger Green
- Discipline of Genetics, Faculty of Medicine, Memorial University of Newfoundland, 300 Prince Philip Drive, HSC, Room H4333, St. John's, NL, A1B 3V6, Canada.
| | - Sevtap Savas
- Discipline of Genetics, Faculty of Medicine, Memorial University of Newfoundland, 300 Prince Philip Drive, HSC, Room H4333, St. John's, NL, A1B 3V6, Canada. .,Discipline of Oncology, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada.
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7
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Singh RK, Srivastava A, Kalaiarasan P, Manvati S, Chopra R, Bamezai RNK. mtDNA germ line variation mediated ROS generates retrograde signaling and induces pro-cancerous metabolic features. Sci Rep 2014; 4:6571. [PMID: 25300428 PMCID: PMC4192639 DOI: 10.1038/srep06571] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 08/18/2014] [Indexed: 12/21/2022] Open
Abstract
mtDNA non-synonymous germ line variation (G10398A; p.A114T) has remained equivocal with least mechanistic understanding in showing an association with cancer. This has necessitated showing in-vitro how an over-expression within mitochondria of either of the variants produces higher intracellular ROS, resulting in differential anchorage dependent and independent growth. Both these features were observed to be relatively higher in ND3:114T variant. An elevated amount of intracellular carbonylated proteins and a reduced activity of a key glycolytic enzyme, Pyruvate kinase M2, along with high glucose uptake and lactate production were other pro-cancerous features observed. The retrograde signaling through surplus ROS was generated by post-ND3 over-expression regulated nuclear gene expression epigenetically, involving selectively the apoptotic-DDR-pathways. The feature of ND3 over-expression, inducing ROS mediated pro-cancerous features in the cells in in vitro, was replicated in a pilot study in a limited number of sporadic breast tumors, suggesting the importance of mitochondrial germ-line variant(s) in enabling the cells to acquire pro-cancerous features.
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Affiliation(s)
- Rajnish Kumar Singh
- National Centre of Applied Human Genetics, School of life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Archita Srivastava
- National Centre of Applied Human Genetics, School of life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Ponnusamy Kalaiarasan
- School of Biotechnology, Shri Mata Vaishno Devi University, Kakriyal, Katra, Jammu &Kashmir, 182320, India
| | - Siddharth Manvati
- School of Biotechnology, Shri Mata Vaishno Devi University, Kakriyal, Katra, Jammu &Kashmir, 182320, India
| | - Rupali Chopra
- National Centre of Applied Human Genetics, School of life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Rameshwar N K Bamezai
- National Centre of Applied Human Genetics, School of life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
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8
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Chen TH, Hsiao HP, Chiu YW, Shih NH, Chuang HY, Huang CT. Maternal diabetes or hypertension and lifestyle factors may be associated with metabolic syndrome: A population-based study in Taiwan. Kaohsiung J Med Sci 2014; 30:86-93. [DOI: 10.1016/j.kjms.2013.09.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 08/05/2013] [Indexed: 12/15/2022] Open
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9
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Rooki H, Ghayour-Mobarhan M, Haerian MS, Ebrahimi M, Azimzadeh P, Heidari-Bakavoli A, Mirfakhraei R, Tavallaie S, Mirhafez R, Ferns G, Zali MR. Lack of association between LXRα and LXRβ gene polymorphisms and prevalence of metabolic syndrome: a case-control study of an Iranian population. Gene 2013; 532:288-93. [PMID: 24100084 DOI: 10.1016/j.gene.2013.09.107] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 07/31/2013] [Accepted: 09/26/2013] [Indexed: 12/21/2022]
Abstract
The metabolic syndrome (MetS) is considered to be a major risk factor for type 2 diabetes mellitus and cardiovascular diseases. It is characterized by central adiposity, high blood pressure, glucose intolerance and abnormalities of lipoprotein metabolism. The cause of MetS is likely to be due to a complex interaction between genetic and environmental factors. Liver X receptors alpha (NR1H3) and beta (NR1H2) play a key role in lipid and carbohydrate metabolism. The aim of this study was to investigate the contribution of genetic polymorphisms in the LXRs to risk of MetS and related traits. Two common SNPs in NR1H3 (rs11039155 and rs2279238) and in NR1H2 (rs17373080 and rs2695121) were genotyped using TaqMan assays in MetS patients (n=265) and controls (n=219). Logistic regression analyses were performed to calculate the odds ratios (ORs) as a measure of association of genotypes with the presence of MetS and related phenotypes. Although The NR1H2 polymorphism rs2695121 was nominally associated with MetS but correction for multiple-testing and adjustment for age, sex and number of MetS criteria, failed to identify any significant interactions associated with prevalence of MetS. However in the haplotype analysis, a LXRα haplotype AC, was more common in controls and was associated with a significant protective effect for MetS (OR [95% CI]=0.25 [0.07-0.88], p=0.031). In conclusion, this study suggests that the above-named variants in LXRα and LXRβ genes are not potential contributors to the risk of MetS and related traits in an Iranian population.
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Affiliation(s)
- Hassan Rooki
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Basic Science and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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10
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Hulgan T, Stein JH, Cotter BR, Murdock DG, Ritchie MD, Dube MP, Gerschenson M, Haas DW, Torriani, for the AIDS Clinical Tri FJ. Mitochondrial DNA variation and changes in adiponectin and endothelial function in HIV-infected adults after antiretroviral therapy initiation. AIDS Res Hum Retroviruses 2013; 29:1293-9. [PMID: 23944767 DOI: 10.1089/aid.2013.0079] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Studies in persons of European descent have suggested that mitochondrial DNA (mtDNA) haplogroups influence antiretroviral therapy (ART) toxicity. We explored associations between mtDNA variants and changes in endothelial function and biomarkers among non-Hispanic white, ART-naive subjects starting ART. A5152s was a substudy of A5142, a randomized trial of initial class-sparing ART regimens that included efavirenz or lopinavir/ritonavir with nucleoside reverse transcriptase inhibitors (NRTIs), or both without NRTIs. Brachial artery flow-mediated dilation (FMD) and cardiovascular biomarker assessments were performed at baseline and at weeks 4 and 24. Ten haplogroup-defining mtDNA polymorphisms were determined. FMD and biomarker changes from baseline to week 24 by mtDNA variant were assessed using Wilcoxon rank-sum tests. Thirty-nine non-Hispanic white participants had DNA and 24-week data. The nonsynonymous m.10398A>G mtDNA polymorphism (N=8) was associated with higher median baseline adiponectin (5.0 vs. 4.2 μg/ml; p=0.003), greater absolute (-1.9 vs. -0.2 μg/ml) and relative (-33% vs. -3%) adiponectin decreases (p<0.001 for both), and lower week 24 brachial artery FMD (3.6% vs. 5.4%; p=0.04). Individual mtDNA haplogroups, including haplogroups H (N=13) and U (N=6), were not associated with adiponectin or FMD changes. In this small pilot study, adiponectin and brachial artery FMD on ART differed in non-Hispanic whites with a nonsynonymous mtDNA variant associated with several human diseases. These preliminary findings support the hypothesis that mtDNA variation influences metabolic ART effects. Validation studies in larger populations and in different racial/ethnic groups that include m.10398G carriers are needed.
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Affiliation(s)
- Todd Hulgan
- Vanderbilt University School of Medicine, Nashville, Tennessee
| | - James H. Stein
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | | | | | | | - Michael P. Dube
- University of Southern California, Keck School of Medicine, Los Angeles, California
| | - Mariana Gerschenson
- University of Hawaii at Manoa, John A. Burns School of Medicine, Honolulu, Hawaii
| | - David W. Haas
- Vanderbilt University School of Medicine, Nashville, Tennessee
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Francis A, Pooja S, Rajender S, Govindaraj P, Tipirisetti NR, Surekha D, Rao DR, Rao L, Ramachandra L, Vishnupriya S, Ramalingam K, Satyamoorthy K, Thangaraj K. A mitochondrial DNA variant 10398G>A in breast cancer among South Indians: an original study with meta-analysis. Mitochondrion 2013; 13:559-65. [PMID: 23993954 DOI: 10.1016/j.mito.2013.08.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 08/05/2013] [Accepted: 08/15/2013] [Indexed: 10/26/2022]
Abstract
The m.10398G>A polymorphism in the MT-ND3 gene has been linked to the manifestation of several neurodegenerative disorders and cancers. Several research groups have analyzed the association between m.10398G>A polymorphism and breast cancer; however, the results do not follow a consensus. We have studied this polymorphism in three Dravidian populations from South India. Analysis on 716 cases and 724 controls found no association between m.10398G>A polymorphism and breast cancer [OR = 0.916 (0.743-1.128); P = 0.409]. Menopausal stratification also revealed no significant association in either pre-menopausal or post-menopausal breast cancer groups. In addition, we undertook a meta-analysis on 16 study groups, comprising a total of 7202 cases and 7490 controls. The pooled odds ratio suggested no significant association of m.10398G>A substitution with breast cancer [OR = 1.016 (0.85-1.22); P = 0.86]. In conclusion, there is no evidence of association between m.10398G>A polymorphism and breast cancer risk among South Indian women. Meta-analysis suggested no overall correlation between this polymorphism and breast cancer risk.
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12
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Ye W, Chen S, Jin S, Lu J. A novel heteroplasmic mitochondrial DNA mutation, A8890G, in a patient with juvenile‑onset metabolic syndrome: a case report. Mol Med Rep 2013; 8:1060-6. [PMID: 23921547 DOI: 10.3892/mmr.2013.1616] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2013] [Accepted: 05/16/2013] [Indexed: 11/05/2022] Open
Abstract
Metabolic syndrome (MS) is a complex disorder characterized by a group of metabolic abnormalities. In the present study, the case of an 18‑year‑old male who presented with MS characteristics with central obesity (overweight and a waist circumference of 95 cm) and dyslipidemia (high TG, low HDL levels and low apoA‑I/apoB‑100) was reported. The patient's family has maternally inherited diabetes and a number of the patient's maternal relatives present MS features. For the investigation of the mitochondrial DNA variants in the patient and the patient's family, genomic DNA of all the family members were extracted from peripheral blood using routine methods. Amplification of mitochondrial DNA in 24 overlapping fragments by PCR, direct sequencing and denaturing high‑performance liquid chromatography was utilized for genetic analysis. Sequences were compared to the reference sequence to identify variants. Bioinformatic methods and databases were used to analyze conservation of the variants and to predict the protein secondary structure. With the exception of the patient, five relatives were diagnosed with MS. Moreover, 5 of the 8 family members had been diagnosed with diabetes, hearing loss and mild kidney impairment according to serum biochemical analysis. Further molecular genetic analysis indicated that the MS‑associated variant T16189C was detected in this family. Notably, a heteroplasmic mutation A8890G was detected in the patient in the mitochondrial ATP6 gene, which codes the ATP synthase subunit 6 (ATPase6). A8890G changed the highly conserved ATPase6 Lys122 into Glu122 in the mitochondrial inner membrane. However, this mutation was not detected in other family members. In conclusion, the mutation A8890G may affect the function of ATPase 6 and the production of ATP, thus contributing to juvenile‑onset MS. It was not detected in other family members possibly due to the mitochondrial genetic segregation or production of a new germline mutation in the juvenile‑onset patient.
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Affiliation(s)
- Wei Ye
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, P.R. China
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13
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Wang X, Luan Q, Chen Q, Zhao L, Guo Y. Mitochondrial polymorphisms and dysfunction related to aggressive periodontitis: a pilot study. Oral Dis 2013; 20:490-8. [PMID: 23902412 DOI: 10.1111/odi.12163] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 05/27/2013] [Accepted: 06/18/2013] [Indexed: 11/28/2022]
Affiliation(s)
- X Wang
- Department of Periodontology Peking University School and Hospital of Stomatology Beijing China
| | - Q Luan
- Department of Periodontology Peking University School and Hospital of Stomatology Beijing China
| | - Q Chen
- State Key Laboratory of Biomembrane and Membrane Biotechnology Institute of Zoology Chinese Academy of Sciences Chaoyang District Beijing China
| | - L Zhao
- State Key Laboratory of Biomembrane and Membrane Biotechnology Institute of Zoology Chinese Academy of Sciences Chaoyang District Beijing China
| | - Y Guo
- Department of Periodontology Peking University School and Hospital of Stomatology Beijing China
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Mabalirajan U, Ghosh B. Mitochondrial dysfunction in metabolic syndrome and asthma. J Allergy (Cairo) 2013; 2013:340476. [PMID: 23840225 PMCID: PMC3687506 DOI: 10.1155/2013/340476] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 05/21/2013] [Indexed: 01/15/2023] Open
Abstract
Though severe or refractory asthma merely affects less than 10% of asthma population, it consumes significant health resources and contributes significant morbidity and mortality. Severe asthma does not fell in the routine definition of asthma and requires alternative treatment strategies. It has been observed that asthma severity increases with higher body mass index. The obese-asthmatics, in general, have the features of metabolic syndrome and are progressively causing a significant burden for both developed and developing countries thanks to the westernization of the world. As most of the features of metabolic syndrome seem to be originated from central obesity, the underlying mechanisms for metabolic syndrome could help us to understand the pathobiology of obese-asthma condition. While mitochondrial dysfunction is the common factor for most of the risk factors of metabolic syndrome, such as central obesity, dyslipidemia, hypertension, insulin resistance, and type 2 diabetes, the involvement of mitochondria in obese-asthma pathogenesis seems to be important as mitochondrial dysfunction has recently been shown to be involved in airway epithelial injury and asthma pathogenesis. This review discusses current understanding of the overlapping features between metabolic syndrome and asthma in relation to mitochondrial structural and functional alterations with an aim to uncover mechanisms for obese-asthma.
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Affiliation(s)
- Ulaganathan Mabalirajan
- Molecular Immunogenetics Laboratory and Centre of Excellence for Translational Research in Asthma & Lung Disease, CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi 110007, India
| | - Balaram Ghosh
- Molecular Immunogenetics Laboratory and Centre of Excellence for Translational Research in Asthma & Lung Disease, CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi 110007, India
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15
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Mitochondrial NADH:ubiquinone oxidoreductase alterations are associated with endometriosis. Mitochondrion 2013; 13:782-90. [PMID: 23685242 DOI: 10.1016/j.mito.2013.05.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 02/09/2013] [Accepted: 05/07/2013] [Indexed: 01/14/2023]
Abstract
Genetic alterations and aberrant expression of 'mitochondrial membrane complex I' (MMC-I) underlie several complex human disorders, but no reports are documented to date in endometriosis. Sequencing of mitochondrially encoded MMC-I subunits revealed 72 mutations of which 2 missense (G10398A; A13603A/G) mutations and 1 synonymous (T10400C) mutation showed higher prevalence in patients. In silico functional analysis predicted A13603A/G, a novel heteroplasmy as a 'damaging variant'. Our results indicate higher endometriosis risk for haplotype '10398A/10400C/13603AG' and haplogroup 'N'. Immunohistochemical analysis revealed elevated MMC-I expression in eutopic endometria of patients compared to controls. In conclusion, MMC-I alterations may constitute an inheritable risk factor for endometriosis.
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16
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Lai CH, Huang SF, Chen IH, Liao CT, Wang HM, Hsieh LL. The mitochondrial DNA Northeast Asia CZD haplogroup is associated with good disease-free survival among male oral squamous cell carcinoma patients. PLoS One 2012. [PMID: 23185408 PMCID: PMC3504154 DOI: 10.1371/journal.pone.0049684] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Reprogramming of energy metabolism in cancer cells has been directly/indirectly linked to mitochondria and mitochondrial functional defects and these changes seem to contribute to the development and progression of cancer. Studies have indicated that mitochondrial DNA haplogroups are associated with risk in relation to various diseases including cancer. However, few studies have examined the effect of haplogroups on cancer prognosis outcome. In order to explore the role of haplogroups on oral squamous cell carcinoma (OSCC) prognosis, the mitochondrial genomes of 300 male OSCC patients were comprehensively analyzed by direct sequencing. They were then haplotyped and grouped into four major geographic haplogroups, namely the East Asia AN, Southeast Asia RBF, East Asia MGE and Northeast Asia CZD groups. The Kaplan-Meier plot analysis indicated that individuals who were members of the CZD haplogroup showed a significant association with better disease-free survival (DFS) than the other three haplogroups and this phenomenon still existed after adjusting for tumor stage, differentiation and age at diagnosis (hazard ratio=0.55; 95% CI=0.36-0.84). In addition, an interaction between membership of the RBF haplogroup and radiotherapy/chemo-radiotherapy in DFS was also identified. The results strongly support the hypothesis that an individual's haplogroup, by defining their genomic background, plays an important role in tumor behavior and mitochondrially-targeted anticancer drugs are promising future therapeutic approaches.
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Affiliation(s)
- Chih-Hsiung Lai
- Graduate Institute of Biomedical Sciences, Chang Gung University, Tao-Yuan, Taiwan
| | - Shiang-Fu Huang
- Department of Otolaryngology, Head and Neck Surgery, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan
| | - I-How Chen
- Department of Otolaryngology, Head and Neck Surgery, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan
| | - Chun-Ta Liao
- Department of Otolaryngology, Head and Neck Surgery, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan
| | - Hung-Ming Wang
- Division of Hematology/Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan
| | - Ling-Ling Hsieh
- Department of Public Health, Chang Gung University, Tao-Yuan, Taiwan
- * E-mail:
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17
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Holzinger ER, Hulgan T, Ellis RJ, Samuels DC, Ritchie MD, Haas DW, Kallianpur AR, Bloss CS, Clifford DB, Collier AC, Gelman BB, Marra CM, McArthur JC, McCutchan JA, Morgello S, Simpson DM, Franklin DR, Rosario D, Selph D, Letendre S, Grant I. Mitochondrial DNA variation and HIV-associated sensory neuropathy in CHARTER. J Neurovirol 2012; 18:511-20. [PMID: 23073667 DOI: 10.1007/s13365-012-0133-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 09/29/2012] [Accepted: 10/04/2012] [Indexed: 01/01/2023]
Abstract
HIV-associated sensory neuropathy remains an important complication of combination antiretroviral therapy and HIV infection. Mitochondrial DNA haplogroups and single nucleotide polymorphisms (SNPs) have previously been associated with symptomatic neuropathy in clinical trial participants. We examined associations between mitochondrial DNA variation and HIV-associated sensory neuropathy in CNS HIV Antiretroviral Therapy Effects Research (CHARTER). CHARTER is a USA-based longitudinal observational study of HIV-infected adults who underwent a structured interview and standardized examination. HIV-associated sensory neuropathy was determined by trained examiners as ≥1 sign (diminished vibratory and sharp-dull discrimination or ankle reflexes) bilaterally. Mitochondrial DNA sequencing was performed and haplogroups were assigned by published algorithms. Multivariable logistic regression of associations between mitochondrial DNA SNPs, haplogroups, and HIV-associated sensory neuropathy were performed. In analyses of associations of each mitochondrial DNA SNP with HIV-associated sensory neuropathy, the two most significant SNPs were at positions A12810G [odds ratio (95 % confidence interval) = 0.27 (0.11-0.65); p = 0.004] and T489C [odds ratio (95 % confidence interval) = 0.41 (0.21-0.80); p = 0.009]. These synonymous changes are known to define African haplogroup L1c and European haplogroup J, respectively. Both haplogroups were associated with decreased prevalence of HIV-associated sensory neuropathy compared with all other haplogroups [odds ratio (95 % confidence interval) = 0.29 (0.12-0.71); p = 0.007 and odds ratio (95 % confidence interval) = 0.42 (0.18-1.0); p = 0.05, respectively]. In conclusion, in this cohort of mostly combination antiretroviral therapy-treated subjects, two common mitochondrial DNA SNPs and their corresponding haplogroups were associated with a markedly decreased prevalence of HIV-associated sensory neuropathy.
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Hung CL, Wu YJ, Liu CC, Chi BC, Chang SS, Wang LY, Yeh HI, Wei YH. Rationale and Design of MAGNET (Mitochondria-AGing in NorthErn Taiwan) Study: A Community-based Cohort Investigating Mitochondria-related Aging and Cardiovascular Diseases in Suburban Areas of Northern Taiwan. INT J GERONTOL 2012. [DOI: 10.1016/j.ijge.2012.05.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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19
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Martins AR, Nachbar RT, Gorjao R, Vinolo MA, Festuccia WT, Lambertucci RH, Cury-Boaventura MF, Silveira LR, Curi R, Hirabara SM. Mechanisms underlying skeletal muscle insulin resistance induced by fatty acids: importance of the mitochondrial function. Lipids Health Dis 2012; 11:30. [PMID: 22360800 PMCID: PMC3312873 DOI: 10.1186/1476-511x-11-30] [Citation(s) in RCA: 190] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Accepted: 02/23/2012] [Indexed: 01/06/2023] Open
Abstract
Insulin resistance condition is associated to the development of several syndromes, such as obesity, type 2 diabetes mellitus and metabolic syndrome. Although the factors linking insulin resistance to these syndromes are not precisely defined yet, evidence suggests that the elevated plasma free fatty acid (FFA) level plays an important role in the development of skeletal muscle insulin resistance. Accordantly, in vivo and in vitro exposure of skeletal muscle and myocytes to physiological concentrations of saturated fatty acids is associated with insulin resistance condition. Several mechanisms have been postulated to account for fatty acids-induced muscle insulin resistance, including Randle cycle, oxidative stress, inflammation and mitochondrial dysfunction. Here we reviewed experimental evidence supporting the involvement of each of these propositions in the development of skeletal muscle insulin resistance induced by saturated fatty acids and propose an integrative model placing mitochondrial dysfunction as an important and common factor to the other mechanisms.
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Affiliation(s)
- Amanda R Martins
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Avenida Professor Lineu Prestes 1524, Butantã, São Paulo, SP, Brazil
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