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Rahmadanthi FR, Maksum IP. Transfer RNA Mutation Associated with Type 2 Diabetes Mellitus. BIOLOGY 2023; 12:871. [PMID: 37372155 DOI: 10.3390/biology12060871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/09/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023]
Abstract
Transfer RNA (tRNA) genes in the mitochondrial DNA genome play an important role in protein synthesis. The 22 tRNA genes carry the amino acid that corresponds to that codon but changes in the genetic code often occur such as gene mutations that impact the formation of adenosine triphosphate (ATP). Insulin secretion does not occur because the mitochondria cannot work optimally. tRNA mutation may also be caused by insulin resistance. In addition, the loss of tRNA modification can cause pancreatic β cell dysfunction. Therefore, both can be indirectly associated with diabetes mellitus because diabetes mellitus, especially type 2, is caused by insulin resistance and the body cannot produce insulin. In this review, we will discuss tRNA in detail, several diseases related to tRNA mutations, how tRNA mutations can lead to type 2 diabetes mellitus, and one example of a point mutation that occurs in tRNA.
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Affiliation(s)
- Fanny Rizki Rahmadanthi
- Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, Indonesia
| | - Iman Permana Maksum
- Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, Indonesia
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2
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Ding H, Zhao Y, Jiang Z, Zhou D, Zhu R. Analysis of Mitochondrial Transfer RNA Mutations in Breast Cancer. Balkan J Med Genet 2023; 25:15-22. [PMID: 37265965 PMCID: PMC10230833 DOI: 10.2478/bjmg-2022-0020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
Damage of mitochondrial functions caused by mitochondrial DNA (mtDNA) pathogenic mutations had long been proposed to be involved in breast carcinogenesis. However, the detailed pathological mechanism remained deeply undetermined. In this case-control study, we screened the frequencies of mitochondrial tRNA (mt-tRNA) mutations in 80 breast cancer tissues and matched normal adjacent tissues. PCR and Sanger sequence revealed five possible pathogenic mutations: tRNAVal G1606A, tRNAIle A4300G, tRNASer(UCN) T7505C, tRNAGlu A14693G and tRNAThr G15927A. We noticed that these mutations resided at extremely conserved positions of tRNAs and would affect tRNAs transcription or modifications. Furthermore, functional analysis suggested that patients with these mt-tRNA mutations exhibited much lower levels of mtDNA copy number and ATP, as compared with controls (p<0.05). Therefore, it can be speculated that these mutations may impair mitochondrial protein synthesis and oxidative phosphorylation (OXPHOS) complexes, which caused mitochondrial dysfunctions that were involved in the breast carcinogenesis. Taken together, our data indicated that mutations in mt-tRNA were the important contributors to breast cancer, and mutational analyses of mt-tRNA genes were critical for prevention of breast cancer.
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Affiliation(s)
- H.J. Ding
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Y.P. Zhao
- Department of Pharmacy, Shaoxing Hospital of Traditional Chinese Medicine Affiliated to Zhejiang Chinese Medical University, Shaoxing, China
| | - Z.C. Jiang
- Department of Pathology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - D.T. Zhou
- Department of Pharmacy, The First People’s Hospital of Kaili, Kaili, China
| | - R. Zhu
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
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3
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Heidari MM, Khatami M, Kamalipour A, Kalantari M, Movahed M, Emmamy MH, Hadadzadeh M, Bragança J, Namnabat M, Mazrouei B. Mitochondrial mutations in protein coding genes of respiratory chain including complexes IV, V, and mt-tRNA genes are associated risk factors for congenital heart disease. EXCLI JOURNAL 2022; 21:1306-1330. [PMID: 36483916 PMCID: PMC9727243 DOI: 10.17179/excli2022-5298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 10/31/2022] [Indexed: 01/25/2023]
Abstract
Most studies aiming at unraveling the molecular events associated with cardiac congenital heart disease (CHD) have focused on the effect of mutations occurring in the nuclear genome. In recent years, a significant role has been attributed to mitochondria for correct heart development and maturation of cardiomyocytes. Moreover, numerous heart defects have been associated with nucleotide variations occurring in the mitochondrial genome, affecting mitochondrial functions and cardiac energy metabolism, including genes encoding for subunits of respiratory chain complexes. Therefore, mutations in the mitochondrial genome may be a major cause of heart disease, including CHD, and their identification and characterization can shed light on pathological mechanisms occurring during heart development. Here, we have analyzed mitochondrial genetic variants in previously reported mutational genome hotspots and the flanking regions of mt-ND1, mt-ND2, mt-COXI, mt-COXII, mt-ATPase8, mt-ATPase6, mt-COXIII, and mt-tRNAs (Ile, Gln, Met, Trp, Ala, Asn, Cys, Tyr, Ser, Asp, and Lys) encoding genes by polymerase chain reaction-single stranded conformation polymorphism (PCR-SSCP) in 200 patients with CHD, undergoing cardiac surgery. A total of 23 mitochondrial variations (5 missense mutations, 8 synonymous variations, and 10 nucleotide changes in tRNA encoding genes) were identified and included 16 novel variants. Additionally, we showed that intracellular ATP was significantly reduced (P=0.002) in CHD patients compared with healthy controls, suggesting that the mutations have an impact on mitochondrial energy production. Functional and structural alterations caused by the mitochondrial nucleotide variations in the gene products were studied in-silico and predicted to convey a predisposing risk factor for CHD. Further studies are necessary to better understand the mechanisms by which the alterations identified in the present study contribute to the development of CHD in patients.
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Affiliation(s)
- Mohammad Mehdi Heidari
- Department of Biology, Yazd University, Yazd, Iran,*To whom correspondence should be addressed: Mohammad Mehdi Heidari, Department of Biology, Yazd University, Yazd, Iran; Tel.: +98 353 1232650, Fax: +98 353 8210644, E-mail:
| | | | | | | | | | | | - Mehdi Hadadzadeh
- Department of Cardiac Surgery, Afshar Hospital, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - José Bragança
- Faculty of Medicine and Biomedical Sciences, Algarve Biomedical Center Research Institute, University of Algarve, Faro, Portugal
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Hou L, Hu C, Ji L, Wang Q, Liang M. The Mitochondrial tRNA Phe 625G>A Mutation in Three Han Chinese Families With Cholecystolithiasis. Front Genet 2022; 13:814729. [PMID: 35719381 PMCID: PMC9198646 DOI: 10.3389/fgene.2022.814729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 04/19/2022] [Indexed: 11/16/2022] Open
Abstract
In this study, we assessed three Chinese families with inherited cholecystolithiasis and conducted the clinical, genetic, and molecular characterization of these subjects. Eight of eighteen matrilineal relatives had a clinical phenotype in these three families. Sequence analysis of complete mitochondrial genomes in these probands identified the homoplasmic tRNAPhe 625 G > A mutation and distinct sets of mtDNA polymorphisms belonging to haplogroups H2, F4b, and M10a. The 625G > A mutation disturbed the classic G-C base-pairings at a highly conserved position 49 in the T-stem of mitochondrial tRNAs. Molecular dynamics simulation showed that the structure of tRNAphe with 625 G > A mutation was noticeably remodeled while compared with the isoform of the wild type. The occurrence of tRNAPhe 625 G > A mutation in these various genetically unrelated subjects strongly indicates that this mutation is involved in the pathogenesis of cholecystolithiasis. This is the first evidence that tRNA mutations are associated with cholecystolithiasis, and it provided more insights into the genetic mechanism of cholecystolithiasis.
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Affiliation(s)
- Lingling Hou
- Department of Medical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Cuifang Hu
- Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, China
| | - Lili Ji
- Department of Medical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Qiongdan Wang
- Department of Medical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Min Liang
- Department of Medical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.,Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, China
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Lai R, Zhang X, Qiao K, Gao X, Li S, Zhang R, Qi Y, Peng C. Identification of sequence polymorphisms in the mitochondrial deoxyribonucleic acid displacement-loop region as risk factors for systemic lupus erythematosus. Arch Rheumatol 2021; 36:375-380. [PMID: 34870169 PMCID: PMC8612499 DOI: 10.46497/archrheumatol.2021.8101] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 06/11/2020] [Indexed: 11/16/2022] Open
Abstract
Objectives
This study aims to evaluate the relationship between sequence polymorphisms (SNPs) in the displacement-loop (D-loop) region of mitochondrial deoxyribonucleic acid (mtDNA) and systemic lupus erythematosus (SLE) in Chinese female patients. Patients and methods
This cross-sectional study was conducted between May 2017 and October 2017. The mtDNA was extracted from the peripheral blood of 97 female SLE patients (mean age 40.8 years; range, 20 to 79 years) and 108 age-matched healthy controls (mean age 48.7 years; range, 22 to 78 years). The SNPs of mtDNA D-loop were verified by polymerase chain reaction amplification and sequence analysis. The allele frequencies of D-loop region were compared by the Chi-square test between SLE and control groups. Results
The SNP accumulation in SLE patients was significantly higher than that in the controls (p=0.027, 95% confidence interval [CI]: 0.075, 1.210). The frequencies of the major alleles of the nucleotides 73G/A (p<0.001, odds ratio [OR]=1.241) and 195T/C (p=0.047, OR=4.318) as well as the minor allele of nucleotide 199T/C (p=0.048, OR=0.279) were significantly higher in the SLE patients than in the controls, which indicated that 73G, 195T and 199C allele in the D-loop of mtDNA were associated with the risk of SLE. Further analysis indicated that the reactive oxygen species level in the SLE patients was significantly higher than that of controls (mean fluorescence intensity ± standard deviation: 3054.333±256.099 vs. 2099.167±599.662, p=0.009, 95% CI: 321.243, 1589.091). Conclusion
This study indicated the SNPs in the mtDNA may associated with the risk of SLE. Analysis of SNPs in the mitochondrial D-loop may help identify individuals who are at high risk of developing SLE.
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Affiliation(s)
- Ruixue Lai
- Department of Immunology and Rheumatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xiaoyun Zhang
- Department of Immunology and Rheumatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Kuangyuan Qiao
- Basic Medical School, Hebei Medical University, Shijiazhuang, China
| | - Xueqing Gao
- Department of Gastroenterology and Hepatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Shang Li
- Department of Gastroenterology and Hepatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Ruixing Zhang
- Department of Gastroenterology and Hepatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Yixin Qi
- Breast Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Chenxing Peng
- Department of Immunology and Rheumatology, The Second Hospital of Hebei Medical University, Shijiazhuang, China
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mtDNA in the Pathogenesis of Cardiovascular Diseases. DISEASE MARKERS 2021; 2021:7157109. [PMID: 34795807 PMCID: PMC8595034 DOI: 10.1155/2021/7157109] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 10/06/2021] [Accepted: 10/24/2021] [Indexed: 12/14/2022]
Abstract
The incidence rate of cardiovascular disease (CVD) has been increasing year by year and has become the main cause for the increase of mortality. Mitochondrial DNA (mtDNA) plays a crucial role in the pathogenesis of CVD, especially in heart failure and ischemic heart diseases. With the deepening of research, more and more evidence showed that mtDNA is related to the occurrence and development of CVD. Current studies mainly focus on how mtDNA copy number, an indirect biomarker of mitochondrial function, contributes to CVD and its underlying mechanisms including mtDNA autophagy, the effect of mtDNA on cardiac inflammation, and related metabolic functions. However, no relevant studies have been conducted yet. In this paper, we combed the current research status of the mechanism related to the influence of mtDNA on the occurrence, development, and prognosis of CVD, so as to find whether these mechanisms have something in common, or is there a correlation between each mechanism for the development of CVD?
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Sukri A, Noorizhab MNF, Teh LK, Salleh MZ. Insight of the mitochondrial genomes of the Orang Asli and Malays: The heterogeneity and the disease-associated variants. Mitochondrion 2021; 62:74-84. [PMID: 34748985 DOI: 10.1016/j.mito.2021.10.010] [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: 03/11/2021] [Revised: 10/27/2021] [Accepted: 10/28/2021] [Indexed: 11/27/2022]
Abstract
Orang Asli are the oldest inhabitants in Peninsular Malaysia that forms as a national minority while the Malays are the majority. The study aimed to screen the mitochondrial genomes of the Orang Asli and the Malays to discover the disease-associated variants. A total of 99 Orang Asli from six tribes (Bateq, Cheq Wong, Orang Kanaq, Kensiu, Lanoh, and Semai) were recruited. Mitochondrial genome sequencing was conducted using a next-generation sequencing platform. Furthermore, we retrieved mitochondrial DNA sequences from the Malays for comparison. The clinical significance, pathogenicity prediction and frequency of variants were determined using online tools. Variants associated with mitochondrial diseases were detected in the 2 populations. A high frequency of variants associated with mitochondrial diseases, breast cancer, prostate cancer, and cervical cancer were detected in the Orang Asli and modern Malays. As medicine evolves to adopt prediction and prevention of diseases, this study highlights the need for intervention to adopt genomics medicine to strategise better healthcare management as a way forward for Precision Health.
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Affiliation(s)
- Asif Sukri
- Integrative Pharmacogenomics Institute, Universiti Teknologi MARA Cawangan Selangor, Puncak Alam Campus, 42300 Puncak Alam, Selangor, Malaysia
| | - Mohd Nur Fakhruzzaman Noorizhab
- Integrative Pharmacogenomics Institute, Universiti Teknologi MARA Cawangan Selangor, Puncak Alam Campus, 42300 Puncak Alam, Selangor, Malaysia; Faculty of Pharmacy, Universiti Teknologi MARA Cawangan Selangor, Puncak Alam Campus, 42300 Puncak Alam, Selangor, Malaysia
| | - Lay Kek Teh
- Integrative Pharmacogenomics Institute, Universiti Teknologi MARA Cawangan Selangor, Puncak Alam Campus, 42300 Puncak Alam, Selangor, Malaysia; Faculty of Pharmacy, Universiti Teknologi MARA Cawangan Selangor, Puncak Alam Campus, 42300 Puncak Alam, Selangor, Malaysia
| | - Mohd Zaki Salleh
- Integrative Pharmacogenomics Institute, Universiti Teknologi MARA Cawangan Selangor, Puncak Alam Campus, 42300 Puncak Alam, Selangor, Malaysia.
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Shuai J, Shi J, Liang Y, Ji F, Gu L, Yuan Z. Mutational analysis of mitochondrial tRNA genes in 138 patients with Leber's hereditary optic neuropathy. Ir J Med Sci 2021; 191:865-876. [PMID: 34053002 DOI: 10.1007/s11845-021-02656-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 05/19/2021] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Mutations in mitochondrial DNA (mtDNA) are the most important causes for Leber's hereditary optic neuropathy (LHON). Of these, three primary mtDNA mutations account for more than 90% cases of this disease. However, to date, little is known regarding the relationship between mitochondrial tRNA (mt-tRNA) variants and LHON. AIM In this study, we aimed to investigate the association between mt-tRNA variants and LHON. METHODOLOGY One hundred thirty-eight LHON patients lacking three primary mutations (ND1 3460G > A, ND4 11778Gxs > A, and ND6 14484 T > C), as well as 266 controls were enrolled in this study. PCR-Sanger sequencing was performed to screen the mt-tRNA variants. Moreover, the phylogenetic analysis, pathogenicity scoring system, as well as mitochondrial functions were performed. RESULTS We identified 8 possible pathogenic variants: tRNAPhe 593 T > C, tRNALeu(UUR) 3275C > T, tRNAGln 4363 T > C, tRNAMet 4435A > G, tRNAAla 5587 T > C, tRNAGlu 14693A > G, tRNAThr 15927G > A, and 15951A > G, which may change the structural and functional impact on the corresponding tRNAs, and subsequently lead to a failure in tRNA metabolism. Furthermore, significant reductions in mitochondrial ATP and MMP levels and an overproduction of ROS were observed in cybrid cells containing these mt-tRNA variants, suggesting that these variants may lead to mitochondrial dysfunction which was responsible for LHON. CONCLUSION Our study indicated that mt-tRNA variants were associated with LHON, and screening for mt-tRNA variants were recommended for early detection, diagnosis, and prevention of maternally inherited LHON.
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Affiliation(s)
- Jie Shuai
- Department of Ophthalmology, the Affiliated Hospital of Nantong University, Nantong, China
| | - Jian Shi
- Department of Ophthalmology, the Affiliated Hospital of Nantong University, Nantong, China
| | - Ya Liang
- Department of Ophthalmology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu Province, China
| | - Fangfang Ji
- Department of Ophthalmology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu Province, China
| | - Luo Gu
- Department of Physiology, Nanjing Medical University, Nanjing, China
| | - Zhilan Yuan
- Department of Ophthalmology, the First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu Province, China.
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You X, Huang X, Bi L, Li R, Zheng L, Xin C. Clinical and molecular features of two diabetes families carrying mitochondrial ND1 T3394C mutation. Ir J Med Sci 2021; 191:749-758. [PMID: 33840063 DOI: 10.1007/s11845-021-02620-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 04/04/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Mutations in mitochondrial DNA (mtDNA) are found to be associated with type 2 diabetes mellitus (T2DM). However, the molecular pathogenesis of these mutations in T2DM is still poorly understood. METHODS In this study, we report here the molecular features of two Han Chinese families with maternally transmitted T2DM. The matrilineal relatives are undergoing clinical, biochemical, genetic evaluations, and molecular analysis. Furthermore, the entire mitochondrial genomes of these matrilineal relatives are screened by PCR-Sanger sequencing. RESULTS The age at onset of T2DM of these participants varies from 28 to 71 years, with an average of 43 years. Molecular analysis of mitochondrial genomes identifies the existence of ND1 T3394C mutation in both families, together with sets of variants belonging to mitochondrial haplogroup Y2 and M9a. The m.T3394C mutation is localized at very conserved tyrosine at position 30 of ND1, may result the failure in ND1 mRNA metabolism, and lead to mitochondrial dysfunction. Moreover, sequence analysis of matrilineal relatives in Family 1 identifies the m.A14693G mutation which occurs in the TΨC-loop of tRNAGlu (position 54), and is critical to the structural formation and stabilization of this tRNA. Thus, m.A14693G mutation may cause the impairment in tRNA metabolism, thereby worsens the mitochondrial dysfunction caused by ND1 T3394C mutation. However, no functional mtDNA variants are identified in Family 2 which suggest that mitochondrial haplogroup may not play an important role in diabetes expression. CONCLUSIONS Our study indicates that mitochondrial ND1 T3394C mutation is involved in the pathogenesis of maternally inherited T2DM in these families.
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Affiliation(s)
- Xiaohong You
- Department of Obstetrics and Gynecology, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou, 646000, China
| | - Xueming Huang
- Department of Emergency, Luzhou Maternal and Child Health and Family Planning Service Center, Luzhou, 646000, China
| | - Luowen Bi
- Department of Obstetrics and Gynecology, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou, 646000, China
| | - Rui Li
- Department of Obstetrics and Gynecology, South Hospital of Fujian Provincial Hospital, Fuzhou, 350007, China
| | - Lin Zheng
- Department of Obstetrics and Gynecology, South Hospital of Fujian Provincial Hospital, Fuzhou, 350007, China
| | - Changzheng Xin
- Department of Obstetrics and Gynecology, South Hospital of Fujian Provincial Hospital, Fuzhou, 350007, China.
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Obesity associated with a novel mitochondrial tRNACys 5802A>G mutation in a Chinese family. Biosci Rep 2021; 40:221715. [PMID: 31868206 PMCID: PMC6944677 DOI: 10.1042/bsr20192153] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 12/18/2019] [Accepted: 12/19/2019] [Indexed: 01/07/2023] Open
Abstract
A Chinese family with matrilineally inherited obesity was assessed and its clinical, genetic, and molecular profiling was conducted. Obesity was observed in matrilineal relatives (3 out of 7) of a single generation (of 3 alive generations) in this family. On pedigree analysis and sequencing of their mitochondrial DNA (mtDNA), a novel homoplasmic mutation of the mitochondrial tRNACys gene (5802A>G) was identified in these individuals. This mutation correlated with a destabilized conserved base pair in this tRNA anticodon stem. Position 30 is known to be crucial for carrying out effective codon recognition and stability of tRNA. In accordance with the importance of this conserved site, we observed that the predicted structure of tRNACys with the mutation was noticeably remodeled in a molecular dynamics simulation when compared with the isoform of the wild-type. All other 46 mutations observed in the individual’s mtDNA were known variants belonging to haplogroup D4. Thus, this is the first report that provides evidence of the association between a mutation in tRNA and an enhanced risk of maternally transmissible obesity, offering more insights into obesity and its underlying nature.
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Ding Y, Yu J, Guo Q, Gao B, Huang J. Molecular characterization of two Chinese pedigrees with maternally inherited hypertension. J Gene Med 2021; 23:e3328. [PMID: 33625761 DOI: 10.1002/jgm.3328] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/06/2021] [Accepted: 02/19/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Mutations in mitochondrial tRNA (mt-tRNA) genes are associated with hypertension, although their pathogenic mechanisms remain poorly understood. METHODS In the present study, two Han Chinese families with maternally transmitted hypertension were interviewed. The mtDNA mutations of matrilineal relatives were screened by polymerase chain reaction-Sanger sequencing. Mitochondrial ATP, membrane potential and reactive oxygen species (ROS) were also analyzed in polymononuclear leukocytes carrying these mt-tRNA mutations. Additionally, the levels of oxidative stress-related biomarkers [malondialdehyde (MDA), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) and 8-hydroxy-2-deoxyguanosine (8-OHdG)] were analyzed. RESULTS Nine of 13 adult matrilineal relatives of these pedigrees exhibited a wide range of severity of hypertension. The age at onset of hypertension was 30-62 years (average 46 years). Mutational screening of mitochondrial genomes revealed tRNAArg T10410C and T10454C mutations. Indeed, the m.T10454C and m.T10410C mutations occurred at conserved bases of TΨC-loop and acceptor arm of tRNAArg (positions 55 and 6), which are critical for tRNAArg post-transcriptional modification. Thus, the defects in tRNA modification may cause failure in tRNA metabolism, impairing mitochondrial translation. Biochemical analysis revealed that m.T10454C or m.T10410C mutation significantly reduced mitochondrial ATP and membrane potential and also increased ROS production in mutant cell lines (all p < 0.05). In addition, the levels of MDA and 8-OHdG in hypertensive patients markedly increased, whereas those of SOD and GSH-Px decreased (all p < 0.05). CONCLUSIONS These findings demonstrate that m.T10410C and m.T10454C mutations affect the structure and function of tRNAArg and consequently alter mitochondrial function and lead to oxidative stress, which are involved in the pathogenesis of maternally inherited hypertension.
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Affiliation(s)
- Yu Ding
- Central laboratory, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jinfang Yu
- Department of Cardiology, Xiaoshan First People's Hospital, Hangzhou, China
| | - Qinxian Guo
- Central laboratory, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Beibei Gao
- Department of Cardiology, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jinyu Huang
- Department of Cardiology, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
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Jia Q, Xu L, Shen J, Wei Y, Xu H, Shi J, Jia Z, Zhao X, Liu C, Zhong Q, Tian Y, He K. Detecting Rare Variants and Heteroplasmy of Mitochondrial DNA from High-Throughput Sequencing in Patients with Coronary Artery Disease. Med Sci Monit 2020; 26:e925401. [PMID: 33132382 PMCID: PMC7646198 DOI: 10.12659/msm.925401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background Although mutations and dysfunction of mitochondrial DNA (mtDNA) are related to a variety of diseases, few studies have focused on the relationship between mtDNA and coronary artery disease (CAD), especially the relationship between rare variants and CAD. Material/Methods Two-stage high-throughput sequencing was performed to detect mtDNA variants or heteroplasmy and the relationship between them and CAD phenotypes. In the discovery stage, mtDNA was analyzed by high-throughput sequencing of long-range PCR products generated from the peripheral blood of 85 CAD patients and 80 demographically matched controls. In the validation stage, high-throughput sequencing for mtDNA target regions captured by GenCap Kit was performed on 100 CAD samples and 100 controls. Finally, tRNA fine mapping was performed between our study and the reported Chinese CAD study. Results Among the tRNA genes, we confirmed a highly conserved rare variant, A5592G, previously reported in the Chinese CAD study, and 2 novel rare mutations that reached Bonferroni’s correction significance in the combined analysis were found (P=7.39×10−4 for T5628C in tRNAAla and P=1.01×10−5 for T681C in 12S rRNA) in the CAD study. Both of them were predicted to be pathological, with T5628C disrupting an extremely conservative base-pairing at the AC stem of tRNAAla. Furthermore, we confirmed the controversial issue that the number of non-synonymous heteroplasmic sites per sample was significantly higher in CAD patients. Conclusions In conclusion, our study confirmed the contribution of rare variants in CAD and showed that CAD patients had more non-synonymous heterogeneity mutations, which may be helpful in identifying the genetic and molecular basis of CAD.
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Affiliation(s)
- Qian Jia
- Core Laboratory of Translational Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland).,Beijing Key laboratory of Chronic Heart Failure Precision Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Lu Xu
- Core Laboratory of Translational Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Juan Shen
- BGI Genomics, Shenzhen, Guangdong, China (mainland)
| | - Yanping Wei
- BGI Genomics, Shenzhen, Guangdong, China (mainland)
| | - Huaiqian Xu
- BGI Genomics, Shenzhen, Guangdong, China (mainland)
| | - Jinlong Shi
- Beijing Key laboratory of Chronic Heart Failure Precision Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland).,Key Laboratory of Biomedical Engineering and Translational Medicine, Ministry of Industry and Information Technology, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Zhilong Jia
- Beijing Key laboratory of Chronic Heart Failure Precision Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland).,Key Laboratory of Biomedical Engineering and Translational Medicine, Ministry of Industry and Information Technology, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Xiaojing Zhao
- Core Laboratory of Translational Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland).,Beijing Key laboratory of Chronic Heart Failure Precision Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Chunlei Liu
- Core Laboratory of Translational Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland).,Beijing Key laboratory of Chronic Heart Failure Precision Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Qin Zhong
- Core Laboratory of Translational Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland).,Beijing Key laboratory of Chronic Heart Failure Precision Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Yaping Tian
- Core Laboratory of Translational Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Kunlun He
- Core Laboratory of Translational Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland).,Beijing Key laboratory of Chronic Heart Failure Precision Medicine, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
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13
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Sun D, Yao S, Wu F, Deng W, Ma Y, Jin L, Wang J, Wang X. Mitochondrial DNA Haplogroup M7 Confers Disability in a Chinese Aging Population. Front Genet 2020; 11:577795. [PMID: 33193696 PMCID: PMC7645148 DOI: 10.3389/fgene.2020.577795] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 10/06/2020] [Indexed: 12/24/2022] Open
Abstract
Mitochondrial DNA (mtDNA) haplogroups have been associated with functional impairments (i.e., decreased gait speed and grip strength, frailty), which are risk factors of disability. However, the association between mtDNA haplogroups and ADL disability is still unclear. In this study, we conducted an investigation of 25 mtSNPs defining 17 major mtDNA haplogroups for ADL disability in an aging Chinese population. We found that mtDNA haplogroup M7 was associated with an increased risk of disability (OR = 3.18 [95% CI = 1.29-7.83], P = 0.012). The survival rate of the M7 haplogroup group (6.1%) was lower than that of the non-M7 haplogroup group (9.5%) after a 6-year follow-up. In cellular studies, cytoplasmic hybrid (cybrid) cells with the M7 haplogroup showed distinct mitochondrial functions from the M8 haplogroup. Specifically, the respiratory chain complex capacity was significantly lower in M7 haplogroup cybrids than in M8 haplogroup cybrids. Furthermore, an obvious decreased mitochondrial membrane potential and 40% reduced ATP-linked oxygen consumption were found in M7 haplogroup cybrids compared to M8 haplogroup cybrids. Notably, M7 haplogroup cybrids generated more reactive oxygen species (ROS) than M8 haplogroup cybrids. Therefore, the M7 haplogroup may contribute to the risk of disability via altering mitochondrial function to some extent, leading to decreased oxygen consumption, but increased ROS production, which may activate mitochondrial retrograde signaling pathways to impair cellular and tissue function.
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Affiliation(s)
- Dayan Sun
- Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
| | - Shun Yao
- Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China.,Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, Shanghai, China
| | - Fei Wu
- Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Wan Deng
- Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Yanyun Ma
- Six-sector Industrial Research Institute, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
| | - Li Jin
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
| | - Jiucun Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
| | - Xiaofeng Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
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14
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Screening for deafness-associated mitochondrial 12S rRNA mutations by using a multiplex allele-specific PCR method. Biosci Rep 2020; 40:224124. [PMID: 32400865 PMCID: PMC7263198 DOI: 10.1042/bsr20200778] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/30/2020] [Accepted: 05/12/2020] [Indexed: 11/17/2022] Open
Abstract
Mitochondrial 12S rRNA A1555G and C1494T mutations are the major contributors to hearing loss. As patients with these mutations are sensitive to aminoglycosides, mutational screening for 12S rRNA is therefore recommended before the use of aminoglycosides. Most recently, we developed a novel multiplex allele-specific PCR (MAS-PCR) that can be used for detecting A1555G and C1494T mutations. In the present study, we employed this MAS-PCR to screen the 12S rRNA mutations in 500 deaf patients and 300 controls from 5 community hospitals. After PCR and electrophoresis, two patients with A1555G and one patient with C1494T were identified, this was consistent with Sanger sequence results. We further traced the origin of three Chinese pedigrees. Clinical evaluation revealed variable phenotypes of hearing loss including severity, age at onset and audiometric configuration in these patients. Sequence analysis of the mitochondrial genomes from matrilineal relatives suggested the presence of three evolutionarily conserved mutations: tRNACys T5802C, tRNALys A8343G and tRNAThr G15930A, which may result the failure in tRNAs metabolism and lead to mitochondrial dysfunction that was responsible for deafness. However, the lack of any functional variants in GJB2, GJB3, GJB6 and TRMU suggested that nuclear genes may not play active roles in deafness expression. Hence, aminoglycosides and mitochondrial genetic background may contribute to the clinical expression of A1555G/C1494T-induced deafness. Our data indicated that the MAS-PCR was a fast, convenience method for screening the 12S rRNA mutations, which was useful for early detection and prevention of mitochondrial deafness.
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15
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The alterations of mitochondrial DNA in coronary heart disease. Exp Mol Pathol 2020; 114:104412. [PMID: 32113905 DOI: 10.1016/j.yexmp.2020.104412] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 02/24/2020] [Accepted: 02/27/2020] [Indexed: 12/17/2022]
Abstract
Coronary heart disease (CHD) is the major cause of death in modern society. CHD is characterized by atherosclerosis, which could lead to vascular cavity stenosis or obstruction, resulting in ischemic cardiac conditions such as angina and myocardial infarction. In terms of the mitochondrion, the main function is to produce adenosine triphosphate (ATP) for cells. And the alterations (including mutations, altered copy number and haplogroups) of mitochondrial DNA (mtDNA) are associated with the abnormal expression of oxidative phosphorylation (OXPHOS) system, resulting in mitochondrial dysfunction, then leading to perturbation on the electron transport chain and increased ROS generation and reduction in ATP level, contributing to ATP-producing disorders and oxidative stress, which may further accelerate development or vulnerability of atherosclerosis and myocardial ischemic injury. Therefore, the mtDNA defects may play an important role in making an early diagnosis, identifying disease-specific biomarkers and therapeutic targets, and predicting outcomes for patients with atherosclerosis and CHD. In this review, we aim to summarize the contribution of mtDNA mutations, altered mtDNA copy number and mtDNA haplogroups on the occurrence and development of CHD.
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16
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Zhang Z, Liu M, He J, Zhang X, Chen Y, Li H. Maternally inherited coronary heart disease is associated with a novel mitochondrial tRNA mutation. BMC Cardiovasc Disord 2019; 19:293. [PMID: 31842766 PMCID: PMC6912950 DOI: 10.1186/s12872-019-01284-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 11/27/2019] [Indexed: 01/26/2023] Open
Abstract
Background Coronary heart disease (CHD) is the most common cause of mortality globally, yet mitochondrial genetic mutations associated with CHD development remain incompletely understood. Methods The subjects from three Chinese families with LHON underwent clinical, genetic, molecular, and biochemical evaluations. Biochemical characterizations included measuring the effects of the15910C > T mutation on tRNAThr levels, enzymatic activity of electron transport chain complexes, membrane permeability, and the mitochondria-mediated generation of both reactive oxygen species (ROS) and adenosine triphosphate (ATP). Results We characterize mitochondrial genetic mutations in a three-generation Chinese family exhibiting signs of maternally inherited CHD. Of the 24 different family members in this pedigree we assessed, CHD was detected in 6, with variable severity and age of first appearance. When we sequenced the mitochondrial genomes of these individuals, we found a tRNAThr 15910C > T mutation of the Eastern Asian haplogroup M7b’c. This mutation is predicted to destabilize the strongly conserved (24C-10G) base-pairing, thereby disrupting tRNAThr functionality. When we performed Northern blotting, we detected we observed a 37.5% reduction in tRNAThr levels at baseline in cybrid cell lines bearing the 15910C > T mutation. When we conducted western blot analysis, we detected a ~ 24.96% decrease in mitochondrial translation rates in these same cells. Conclusions In the present report, Together these findings suggest a possible link between this 15910C > T tRNAThr mutation and CHD, potentially offering new avenues for future disease intervention.
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Affiliation(s)
- Zhenxiao Zhang
- Department of Emergency, Affiliated hospital of Qingdao university, Jiangsu Road No. 16, Qingdao, 266000, Shandong, China
| | - Mingyang Liu
- Department of Emergency, Affiliated hospital of Qingdao university, Jiangsu Road No. 16, Qingdao, 266000, Shandong, China
| | - Jianshuai He
- Department of Anesthesiology, Affiliated hospital of Qingdao university, Qingdao, 266000, Shandong, China
| | - Xiaotian Zhang
- Department of Anesthesiology, Affiliated hospital of Qingdao university, Qingdao, 266000, Shandong, China
| | - Yuehua Chen
- Department of ICU, Affiliated hospital of Qingdao university, Qingdao, 266000, Shandong, China
| | - Hui Li
- Department of Emergency, Affiliated hospital of Qingdao university, Jiangsu Road No. 16, Qingdao, 266000, Shandong, China.
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17
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Yang P, Wu P, Liu X, Feng J, Zheng S, Wang Y, Fan Z. Mitochondrial tRNASer(UCN) 7471delC may be a novel mutation associated with maternally transmitted hypertension. Ir J Med Sci 2019; 189:489-496. [DOI: 10.1007/s11845-019-02143-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 11/14/2019] [Indexed: 02/07/2023]
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18
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Jia Z, Zhang Y, Li Q, Ye Z, Liu Y, Fu C, Cang X, Wang M, Guan MX. A coronary artery disease-associated tRNAThr mutation altered mitochondrial function, apoptosis and angiogenesis. Nucleic Acids Res 2019; 47:2056-2074. [PMID: 30541130 PMCID: PMC6393294 DOI: 10.1093/nar/gky1241] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 10/31/2018] [Accepted: 11/30/2018] [Indexed: 12/14/2022] Open
Abstract
The tissue specificity of mitochondrial tRNA mutations remains largely elusive. In this study, we demonstrated the deleterious effects of tRNAThr 15927G>A mutation that contributed to pathogenesis of coronary artery disease. The m.15927G>A mutation abolished the highly conserved base-pairing (28C-42G) of anticodon stem of tRNAThr. Using molecular dynamics simulations, we showed that the m.15927G>A mutation caused unstable tRNAThr structure, supported by decreased melting temperature and slower electrophoretic mobility of mutated tRNA. Using cybrids constructed by transferring mitochondria from a Chinese family carrying the m.15927G>A mutation and a control into mitochondrial DNA (mtDNA)-less human umbilical vein endothelial cells, we demonstrated that the m.15927G>A mutation caused significantly decreased efficiency in aminoacylation and steady-state levels of tRNAThr. The aberrant tRNAThr metabolism yielded variable decreases in mtDNA-encoded polypeptides, respiratory deficiency, diminished membrane potential and increased the production of reactive oxygen species. The m.15927G>A mutation promoted the apoptosis, evidenced by elevated release of cytochrome c into cytosol and increased levels of apoptosis-activated proteins: caspases 3, 7, 9 and PARP. Moreover, the lower wound healing cells and perturbed tube formation were observed in mutant cybrids, indicating altered angiogenesis. Our findings provide new insights into the pathophysiology of coronary artery disease, which is manifested by tRNAThr mutation-induced alterations.
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Affiliation(s)
- Zidong Jia
- Division of Medical Genetics and Genomics, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China.,Institute of Genetics, Zhejiang University and Department of Human Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Ye Zhang
- Institute of Genetics, Zhejiang University and Department of Human Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Qiang Li
- Institute of Genetics, Zhejiang University and Department of Human Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Zhenzhen Ye
- Institute of Genetics, Zhejiang University and Department of Human Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Yuqi Liu
- Cardiac Department, PLA General Hospital, Beijing 100853, China
| | - Changzhu Fu
- Institute of Genetics, Zhejiang University and Department of Human Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Xiaohui Cang
- Division of Medical Genetics and Genomics, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China.,Institute of Genetics, Zhejiang University and Department of Human Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Meng Wang
- Division of Medical Genetics and Genomics, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China.,Institute of Genetics, Zhejiang University and Department of Human Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Min-Xin Guan
- Division of Medical Genetics and Genomics, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China.,Institute of Genetics, Zhejiang University and Department of Human Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China.,Key lab of Reproductive Genetics, Ministry of Education of PRC, Zhejiang University, Hangzhou, Zhejiang 310058, China.,Joint Institute of Genetics and Genome Medicine between Zhejiang University and University of Toronto, Hangzhou, Zhejiang 310058, China
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19
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You C, Tao R, Su Q, Lu Y, Wang L, Liu S, Wang L, Wang L, Xue F, Che F. Mitochondrial DNA analyses found five novel mutations in idiopathic epilepsy patients. Mitochondrial DNA B Resour 2019; 4:2387-2391. [PMID: 33365557 PMCID: PMC7707843 DOI: 10.1080/23802359.2019.1633963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 06/15/2019] [Indexed: 11/11/2022] Open
Abstract
Epilepsy is a common and chronic neurological disease with a high degree of genetic heterogeneity. The etiology and pathogenesis of the disease have not been fully understood. Many studies suggested that there was a reciprocal relationship between mitochondrial dysfunction and epilepsy, but few studies focused on the mitochondrial genome (mtDNA) of the epilepsy patient which was extremely important for the mitochondrial function. In our study, we obtained complete mtDNA sequences of 27 idiopathic epilepsy patients and healthy people, and compared the sequence data with 30,000 GenBank sequences including 277 Han Chinese mtDNA sequences. We analyzed each variant that might be related to disease and examined the statistically significant variant in more than 300 patients and healthy people. Ultimately, we identified 27 variants which were reported to be associated with diseases, 4 rare variants (321T > G, 15973 T > C, 3897C > A, 12580 C > T), and a nonsynonymous variant (3571 C > T) which was predicted to be damaging. Although no variant was found to be significantly associated with epilepsy, our study provided a new insight into epilepsy study on an aspect of the mitochondrial genome.
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Affiliation(s)
- Cuiping You
- Department of Central Laboratory, Linyi People’s Hospital, Shandong University, Linyi, Shandong Province, China
| | - Rui Tao
- Department of Neurology, Linyi People’s Hospital, Shandong University, Linyi, Shandong Province, China
| | - Quanping Su
- Department of Central Laboratory, Linyi People’s Hospital, Shandong University, Linyi, Shandong Province, China
| | - Yucheng Lu
- Department of Central Laboratory, Linyi People’s Hospital, Shandong University, Linyi, Shandong Province, China
| | - Long Wang
- Department of Central Laboratory, Linyi People’s Hospital, Shandong University, Linyi, Shandong Province, China
| | - Shu Liu
- Department of Central Laboratory, Linyi People’s Hospital, Shandong University, Linyi, Shandong Province, China
| | - Lifen Wang
- Department of Central Laboratory, Linyi People’s Hospital, Shandong University, Linyi, Shandong Province, China
| | - Lijuan Wang
- Department of Central Laboratory, Linyi People’s Hospital, Shandong University, Linyi, Shandong Province, China
| | - Fuzhong Xue
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan, China
| | - Fengyuan Che
- Department of Central Laboratory, Linyi People’s Hospital, Shandong University, Linyi, Shandong Province, China
- Department of Neurology, Linyi People’s Hospital, Shandong University, Linyi, Shandong Province, China
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20
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Duan M, Chen L, Ge Q, Lu N, Li J, Pan X, Qiao Y, Tu J, Lu Z. Evaluating heteroplasmic variations of the mitochondrial genome from whole genome sequencing data. Gene 2019; 699:145-154. [PMID: 30876822 DOI: 10.1016/j.gene.2019.03.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 03/08/2019] [Accepted: 03/11/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND Detecting heteroplasmic variations in the mitochondrial genome can help identify potential pathogenic possibilities, which is significant for disease prevention. The development of next-generation sequencing changed the quantification of mitochondrial DNA (mtDNA) heteroplasmy from scanning limited recorded points to the entire mitochondrial genome. However, due to the presence of nuclear mtDNA homologous sequences (nuMTs), maximally retaining real variations while excluding falsest heteroplasmic variations from nuMTs and sequencing errors presents a dilemma. RESULTS Herein, we used an improved method for detecting low-frequency mtDNA heteroplasmic variations from whole genome sequencing data, including point variations and short-fragment length alterations, and evaluated the effect of this method. A two-step alignment was designed and performed to accelerate data processing, to obtain and retain the true mtDNA reads and to eliminate most nuMTs reads. After analyzing whole genome sequencing data of K562 and GM12878 cells, ~90% of heteroplasmic point variations were identified in MitoMap. The results were consistent with the results of an amplification refractory mutation system qPCR. Many linkages of the detected heteroplasmy variations were also discovered. CONCLUSIONS Our improved method is a simple, efficient and accurate way to mine mitochondrial low-frequency heteroplasmic variations from whole genome sequencing data. By evaluating the highest misalignment possibility caused by the remaining nuMTs-like reads and sequencing errors, our procedure can detect mtDNA heteroplasmic variations whose heteroplasmy frequencies are as low as 0.2%.
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Affiliation(s)
- Mengqin Duan
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Liang Chen
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Qinyu Ge
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Na Lu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Junji Li
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Xuan Pan
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing 210009, China
| | - Yi Qiao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Jing Tu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Zuhong Lu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
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21
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Tang K, Gao Z, Han C, Zhao S, Du X, Wang W. Screening of mitochondrial tRNA mutations in 300 infants with hearing loss. Mitochondrial DNA A DNA Mapp Seq Anal 2018; 30:345-350. [PMID: 30451057 DOI: 10.1080/24701394.2018.1527910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Mitochondrial DNA (MtDNA) mutations are the important causes for hearing loss. To see the contribution of mtDNA to deafness, we screened for mutations in mt-tRNA genes from 300 deaf infants and 200 healthy subjects. Moreover, we analyzed the mtDNA copy number and ROS levels in patients carrying the mt-tRNA mutations. Consequently, 3 mt-tRNA mutations: tRNALeu(UUR) A3243G; tRNAAla T5655C and tRNAGlu A14692G were identified, however, these mutations were not detected in controls. Of these, the A3243G mutation created a novel base-pairing (13G-23A) in the D-stem of tRNALeu(UUR); while the T5655C mutation occurred at the very conserved acceptor arm of tRNAAla; in addition, the A14692G mutation was located at position 55 in the TΨC loop of tRNAGlu. Molecular analysis showed that patients harbouring the A3243G, T5655C and A14692G mutations had a lower level of mtDNA copy number, while ROS level increased significantly when compared with controls. Through the application of the pathogenicity scoring system, we noticed that the A3243G, T5655C and A14692G should be regarded as 'definitely pathogenic' mutations associated with deafness. Thus, our study provided novel insight into the pathophysiology, early detection of mitochondrial deafness.
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Affiliation(s)
- Kai Tang
- a Genetic eugenics Laboratory, Baoji Women and Child Health Care Hospital , Baoji , Shaanxi , People's Republic of China
| | - Ziying Gao
- b Department of Laboratory Medicine, Baoji Central Hospital , Baoji , Shaanxi , People's Republic of China
| | - Chunling Han
- a Genetic eugenics Laboratory, Baoji Women and Child Health Care Hospital , Baoji , Shaanxi , People's Republic of China
| | - Suolin Zhao
- a Genetic eugenics Laboratory, Baoji Women and Child Health Care Hospital , Baoji , Shaanxi , People's Republic of China
| | - Xiaoyun Du
- a Genetic eugenics Laboratory, Baoji Women and Child Health Care Hospital , Baoji , Shaanxi , People's Republic of China
| | - Wenjuan Wang
- a Genetic eugenics Laboratory, Baoji Women and Child Health Care Hospital , Baoji , Shaanxi , People's Republic of China
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22
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Dong HL, Ma Y, Li QF, Du YC, Yang L, Chen S, Wu ZY. Genetic and clinical features of Chinese patients with mitochondrial ataxia identified by targeted next-generation sequencing. CNS Neurosci Ther 2018; 25:21-29. [PMID: 29756269 DOI: 10.1111/cns.12972] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 04/03/2018] [Accepted: 04/05/2018] [Indexed: 12/17/2022] Open
Abstract
AIM To characterize the mutations in mitochondrial DNA (mtDNA) and mitochondrion-related nuclear genes (nDNA), and clinical features in Chinese patients with mitochondrial ataxia. METHODS Targeted next-generation sequencing (NGS) technology was performed to screen the whole mtDNA sequence and nDNA genes in a cohort of 33 unrelated ataxia patients. RESULTS A total of 5 pedigrees were finally genetically diagnosed as mitochondrial ataxia, with 3 pathogenic mutations (m.8344A>G, m.9176T>C, and m.9185T>C), one likely pathogenic mutation (m.3995A>G) in mtDNA, and one pathogenic mutation (c.1159_1162dupAAGT, p.Ser388Terfs) in PDHA1. The prevalence of mitochondrial ataxia in our patient cohort is 15.2%. In addition, all 4 patients with mtDNA mutations experienced symptoms of ataxia with age at onset ranging from 12 to 39 years (21 ± 12.2) and developed extrapyramidal symptoms during the disease course. One male patient with pyruvate dehydrogenase deficiency showed an acute intermittent ataxia phenotype. CONCLUSIONS Our results implicate that mitochondrial ataxia might not be as rare in Chinese as previously assumed. This study firstly defines the mutations of mitochondrial ataxia in a Chinese population by targeted NGS, which broadens the clinical spectrum of mtDNA mutations and highlights the importance of screening mtDNA and nDNA mutations among undefined ataxia patients.
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Affiliation(s)
- Hai-Lin Dong
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China
| | - Yin Ma
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China
| | - Quan-Fu Li
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China
| | - Yi-Chu Du
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China
| | - Lu Yang
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China
| | - Sheng Chen
- Department of Neurology, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhi-Ying Wu
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China
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Abstract
PURPOSE OF REVIEW Cardiovascular disease (CVD) is responsible for more morbidity and mortality worldwide than any other ailment. Strategies for reducing CVD prevalence must involve identification of individuals at high risk for these diseases, and the prevention of its initial development. Such preventive efforts are currently limited by an incomplete understanding of the genetic determinants of CVD risk. In this review, evidence for the involvement of inherited mitochondrial mutations in development of CVD is examined. RECENT FINDINGS Several forms of CVD have been documented in the presence of pathogenic mitochondrial DNA (mtDNA) mutations, both in isolation and as part of larger syndromes. Other 'natural' mtDNA polymorphisms not overtly tied to any pathology have also been associated with alterations in mitochondrial function and individual risk for CVD, but until very recently these studies have been merely correlative. Fortunately, novel animal models are now allowing investigators to define a causal relationship between inherited 'natural' mtDNA polymorphisms, and cardiovascular function and pathology. SUMMARY Cardiovascular involvement is highly prevalent among patients with pathogenic mtDNA mutations. The relationship between CVD susceptibility and 'natural' mtDNA polymorphisms requires further investigation, but will be aided in the near future by several novel experimental models.
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Affiliation(s)
- Alexander W. Bray
- Division of Molecular and Cellular Pathology, Department of Pathology, University of Alabama at Birmingham
| | - Scott W. Ballinger
- Division of Molecular and Cellular Pathology, Department of Pathology, University of Alabama at Birmingham
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24
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Xu Y, Chen X, Huang H, Liu W. The Mitochondrial tRNA Ala T5655C Mutation May Modulate the Phenotypic Expression of tRNA Met and tRNA Gln A4401G Mutation in a Han Chinese Family With Essential Hypertension. Int Heart J 2017; 58:95-99. [DOI: 10.1536/ihj.16-205] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Yunhong Xu
- Department of Cardiology, The Third Affiliated Hospital of Guangzhou Medical University
| | - Ximing Chen
- Department of Cardiology, The Third Affiliated Hospital of Guangzhou Medical University
| | - Huanliang Huang
- Department of Emergency, The Third Affiliated Hospital of Guangzhou Medical University
| | - Wanting Liu
- Department of Physical Examination Center, The Third Affiliated Hospital of Guangzhou Medical University
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Xue L, Wang M, Li H, Wang H, Jiang F, Hou L, Geng J, Lin Z, Peng Y, Zhou H, Yu H, Jiang P, Mo JQ, Guan MX. Mitochondrial tRNA mutations in 2070 Chinese Han subjects with hypertension. Mitochondrion 2016; 30:208-21. [PMID: 27544295 DOI: 10.1016/j.mito.2016.08.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 07/21/2016] [Accepted: 08/16/2016] [Indexed: 12/28/2022]
Abstract
BACKGROUND Mitochondria have the profound impact on vascular function in both health and disease. However, mitochondrial genetic determinants for the development of hypertension remain poorly explored. METHODS AND RESULTS The Sanger sequence analysis of 22 mitochondrial tRNA genes were performed in a cohort of 2070 Han Chinese hypertensive and 512 control subjects. This analysis identified 165 variants among 22 tRNA genes. These variants were evaluated for the pathogenicity using the following criteria: (1) present in <1% of the controls; (2) evolutional conservation; (3) potential structural and functional alterations. We identified 47 (5 known and 42 novel/putative) hypertension-associated tRNA variants in 80 hypertensive subjects. These variants could have potential structural alterations and functional significance of tRNAs. By using lymphoblastoid cell lines derived from 6 probands carrying one of 6 represented variants (tRNA(Ala) 5655T>C, tRNA(Gly) 10003T>C, tRNA(Leu(UUR)) 3253T>C, tRNA(Asp) 7551A>G, tRNA(Glu) 14692A>G, tRNA(Thr) 15909A>G) and 6 control subjects lacking these variants, we showed marked reductions in the steady-state level of corresponding 5 tRNAs, but not tRNA(Thr), in mutant cell lines, compared with control cells lines. The various decreases in the activities of complexes I, III and IV were observed in mutant cells carrying one of five tRNA variants, except tRNA(Thr) 15909A>G variant. The deficient respirations were responsible for the decrease in the mitochondrial ATP production and increasing production of reactive oxygen species in mutant cell lines carrying one of five tRNA variants. CONCLUSION Mitochondrial tRNA variants are the important causes of hypertension, accounting for 3.9% cases of 2070 Han Chinese hypertensive subjects. Our findings may provide new insights into the pathophysiology of hypertension that were manifested by mitochondrial dysfunction.
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Affiliation(s)
- Ling Xue
- Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Meng Wang
- Institute of Genetics, Zhejiang University, Department of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Division of Medical Genetics and Genomics, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Haiying Li
- Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, Zhejiang, China; Department of Cardiology, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Heng Wang
- Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Feng Jiang
- Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Lingling Hou
- Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Junwei Geng
- Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Zhi Lin
- Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yanyan Peng
- Institute of Genetics, Zhejiang University, Department of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Hong Zhou
- Institute of Genetics, Zhejiang University, Department of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Han Yu
- Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Pingping Jiang
- Institute of Genetics, Zhejiang University, Department of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Division of Medical Genetics and Genomics, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jun Qin Mo
- Department of Pathology, Rady Children's Hospital, University of California San Diego School of Medicine, San Diego, CA, USA
| | - Min-Xin Guan
- Attardi Institute of Mitochondrial Biomedicine, Wenzhou Medical University, Wenzhou, Zhejiang, China; Institute of Genetics, Zhejiang University, Department of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Division of Medical Genetics and Genomics, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China; Joining Institute of Genetics and Genomic Medicine between Zhejiang University and University of Toronto, Hangzhou, Zhejiang, China.
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26
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A Hypertension-Associated tRNAAla Mutation Alters tRNA Metabolism and Mitochondrial Function. Mol Cell Biol 2016; 36:1920-30. [PMID: 27161322 PMCID: PMC4936059 DOI: 10.1128/mcb.00199-16] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 05/04/2016] [Indexed: 01/11/2023] Open
Abstract
In this report, we investigated the pathophysiology of a novel hypertension-associated mitochondrial tRNAAla 5655A → G (m.5655A → G) mutation. The destabilization of a highly conserved base pairing (A1-U72) at the aminoacyl acceptor stem by an m.5655A → G mutation altered the tRNAAla function. An in vitro processing analysis showed that the m.5655A → G mutation reduced the efficiency of tRNAAla precursor 5′ end cleavage catalyzed by RNase P. By using cybrids constructed by transferring mitochondria from lymphoblastoid cell lines derived from a Chinese family into mitochondrial DNA (mtDNA)-less (ρo) cells, we showed a 41% reduction in the steady-state level of tRNAAla in mutant cybrids. The mutation caused an improperly aminoacylated tRNAAla, as suggested by aberrantly aminoacylated tRNAAla and slower electrophoretic mobility of mutated tRNA. A failure in tRNAAla metabolism contributed to variable reductions in six mtDNA-encoded polypeptides in mutant cells, ranging from 21% to 37.5%, with an average of a 29.1% reduction, compared to levels of the controls. The impaired translation caused reduced activities of mitochondrial respiration chains. Furthermore, marked decreases in the levels of mitochondrial ATP and membrane potential were observed in mutant cells. These caused increases in the production of reactive oxygen species in the mutant cybrids. The data provide evidence for the association of the tRNAAla 5655A → G mutation with hypertension.
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Tang X, Zheng J, Ying Z, Cai Z, Gao Y, He Z, Yu H, Yao J, Yang Y, Wang H, Chen Y, Guan MX. Mitochondrial tRNA(Ser(UCN)) variants in 2651 Han Chinese subjects with hearing loss. Mitochondrion 2015; 23:17-24. [PMID: 25968158 DOI: 10.1016/j.mito.2015.05.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 04/14/2015] [Accepted: 05/04/2015] [Indexed: 12/17/2022]
Abstract
Mutations in the mitochondrial DNA have been associated with hearing loss. However, the prevalence and spectrum of mitochondrial tRNA mutations in hearing-impaired subjects are poorly understood. In this report, we have investigated the prevalence and spectrum of mitochondrial tRNA(Ser(UCN)) mutations in a large cohort of 2651 Han Chinese subjects with hearing loss. The clinical evaluation showed that 744 subjects (432 males and 312 females) had a history of exposure to aminoglycosides and other probands exhibited nonsyndromic hearing loss. Mutational analysis of tRNA(Ser(UCN)) gene identified 9 (8 known and 1 novel) variants. The prevalence of the known deafness-associated 7511T>C, 7505T>C and 7445A>C mutations was 0.04%, 0.04% and 0.04%, respectively. Other variants were evaluated by the evolutionary conservation, allelic frequency of Chinese controls, potential structural and functional alterations and pedigree analysis. Three variants were polymorphisms, while the 7444G>A, 7471DelG and 7496A>G variants were putative deafness-associated mutations. These putative deafness-associated variants accounted for 0.68% cases of hearing-impaired subjects in this cohort. The low penetrance of hearing loss in pedigrees carrying one of these putative deafness-associated mutations indicated that the mutation(s) is necessary but itself insufficient to produce a clinical phenotype. Other genetic or environmental factor(s) may influence the phenotypic manifestation of these tRNA(Ser(UCN)) mutations. Moreover, mtDNAs in 20 probands carrying one of the putative deafness-associated mutations were widely dispersed among 8 Eastern Asian haplogroups. In particular, the occurrences of haplogroups D4a, M22, and H2 in patients carrying the deafness-associated variants were higher than those in Chinese controls. These data further support that the mitochondrial tRNA(Ser(UCN)) gene is the hot spot for mutations associated with hearing loss. Thus, our findings may provide valuable information for the further understanding of pathophysiology and management of hearing loss.
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Affiliation(s)
- Xiaowen Tang
- Attardi Institute of Mitochondrial Biomedicine, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jing Zheng
- Institute of Genetics, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zhengbiao Ying
- Department of Otolaryngology, Wenling People's Hospital, Wenzhou Medical University, Wenling, Zhejiang, China
| | - Zhaoyang Cai
- Department of Otolaryngology, Wenling People's Hospital, Wenzhou Medical University, Wenling, Zhejiang, China
| | - Yinglong Gao
- Attardi Institute of Mitochondrial Biomedicine, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Zheyun He
- Attardi Institute of Mitochondrial Biomedicine, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Han Yu
- Attardi Institute of Mitochondrial Biomedicine, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Juan Yao
- Attardi Institute of Mitochondrial Biomedicine, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yaling Yang
- Attardi Institute of Mitochondrial Biomedicine, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Hui Wang
- Attardi Institute of Mitochondrial Biomedicine, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Ye Chen
- Institute of Genetics, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Min-Xin Guan
- Attardi Institute of Mitochondrial Biomedicine, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China; Institute of Genetics, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
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Yang Y, Zhou T, Peng M, Liu Y, Li Y, Wang H, Irwin DM, Zhang Y. Complete mtDNA genomes reveal similar penetrances of maternally inherited type 2 diabetes in two Chinese families. Mitochondrial DNA A DNA Mapp Seq Anal 2014; 27:2040-4. [PMID: 25469813 DOI: 10.3109/19401736.2014.982552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Previous work suggests that mitochondrial DNA (mtDNA) derived from the maternal genome has a close affinity with type 2 diabetes. This would support a familial pattern for type 2 diabetes. Thereby, we analyzed complete mtDNA genomes from two families, A and B, from Southwest China that demonstrated maternally inherited type 2 diabetes. Our data support that mtDNA lineages from families A and B belong to haplogroups A4 and D4h1, respectively. This suggests that maternally inherited type 2 diabetes with similar penetrances can arise in Chinese individuals with strikingly different maternal genetic backgrounds. Two private coding region mutations (G13759A in MT-ND5 and G15930A in tRNA-Thr) were identified in family B. Further evolutionary and phylogenetic analyses suggest that both these mutations have multiple origins and are unlikely to be disease causing.
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Affiliation(s)
- Ying Yang
- a Laboratory for Conservation and Utilization of Bio-resources , Yunnan University , Kunming , Yunnan Province , China .,b Department of endocrinology , the Second People's Hospital of Yunnan Province , Kunming , Yunnan Province , China
| | - Taicheng Zhou
- a Laboratory for Conservation and Utilization of Bio-resources , Yunnan University , Kunming , Yunnan Province , China .,c Kunming College of Life Science, University of Chinese Academy of Sciences , Kunming , Yunnan Province , China .,d State Key Laboratory of Genetic Resources and Evolution , Kunming Institute of Zoology, Chinese Academy of Sciences , Kunming , Yunnan Province , China
| | - Minsheng Peng
- d State Key Laboratory of Genetic Resources and Evolution , Kunming Institute of Zoology, Chinese Academy of Sciences , Kunming , Yunnan Province , China .,e KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases , Kunming , Yunnan Province , China
| | - Yongying Liu
- b Department of endocrinology , the Second People's Hospital of Yunnan Province , Kunming , Yunnan Province , China
| | - Yiping Li
- b Department of endocrinology , the Second People's Hospital of Yunnan Province , Kunming , Yunnan Province , China
| | - Huawei Wang
- f Yunnan Institute of Digestive Disease, the First Affiliated Hospital of Kunming Medical University , Yunnan Province , China , and
| | - David M Irwin
- d State Key Laboratory of Genetic Resources and Evolution , Kunming Institute of Zoology, Chinese Academy of Sciences , Kunming , Yunnan Province , China .,g Department of Laboratory Medicine and Pathobiology , University of Toronto , Toronto , Ontario , Canada
| | - Yaping Zhang
- a Laboratory for Conservation and Utilization of Bio-resources , Yunnan University , Kunming , Yunnan Province , China .,c Kunming College of Life Science, University of Chinese Academy of Sciences , Kunming , Yunnan Province , China .,d State Key Laboratory of Genetic Resources and Evolution , Kunming Institute of Zoology, Chinese Academy of Sciences , Kunming , Yunnan Province , China .,e KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases , Kunming , Yunnan Province , China
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Luo Z. Mitochondrial tRNAArg T10454C variant may not influence the clinical expression of deafness associated 12S rRNA A1555G mutation. Mitochondrial DNA A DNA Mapp Seq Anal 2014; 27:1137-40. [PMID: 24983150 DOI: 10.3109/19401736.2014.933337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this study, we examined the "pathogenic" role of the T10454C mutation in mitochondrial tRNA(Arg) gene in deafness expression as increasing reports provided an active role of this mutation in clinical manifestation of deafness associated 12S rRNA A1555G mutation. For this purpose, we reanalyzed the complete mitochondrial DNA (mtDNA) sequence data containing the T10454C mutation. Moreover, we analyzed the reported "polymorphisms" of mtDNA in the proband using the phylogentic approach. To our surprise, other mutations which occurred at protein-coding genes played more important roles in resulting mitochondrial dysfunctions by using the bioinformatic tool. In addition, evolutionary conservation analysis of the T10454C mutation indicated that this mutation was not conserved between different species. To our knowledge, this is the first report that the T10454C variant may not modulate the phenotypic expression of the deafness associated A1555G mutation.
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Affiliation(s)
- Zhiyi Luo
- a Department of the Emergency Center , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
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30
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Pei H, Peng Q, Lan C, Chi Liu B. Variations in mitochondrial tRNAThrgene may not be associated with coronary heart disease. ACTA ACUST UNITED AC 2014; 27:565-8. [DOI: 10.3109/19401736.2014.905862] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Schiattarella GG, Trimarco B, Perrino C, Esposito G. tURn the Lights on: Mitochondrial Transport‐RNAs and Cardiovascular Disease. J Am Heart Assoc 2014; 3:e000757. [PMID: 24584743 PMCID: PMC3959697 DOI: 10.1161/jaha.113.000757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
| | - Bruno Trimarco
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Cinzia Perrino
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Giovanni Esposito
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
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