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Yan H, Liu B, Cui Y, Wang Y, Sun S, Wang J, Tan M, Wang Y, Zhang Y. LpNAC6 reversely regulates the alkali tolerance and drought tolerance of Lilium pumilum. JOURNAL OF PLANT PHYSIOLOGY 2022; 270:153635. [PMID: 35124291 DOI: 10.1016/j.jplph.2022.153635] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 01/28/2022] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
NAC transcription factors have multiple biological functions in plants. In this study, a new NAC transcription factor, LpNAC6, was cloned from Lilium pumilum, and its salt and drought resistance functions were identified. We treated LpNAC6 transgenic tobacco plants with different intensities of alkali and drought stress. Results showed that LpNAC6 transgenic tobacco had enhanced alkali tolerance, but decreased drought tolerance. Antioxidant enzyme (SOD, POD, CAT) activity, chlorophyll content, proline content, and photosynthetic capacity of transgenic tobacco were significantly higher than those of wild-type tobacco, while the contents of MDA, H2O2, and O2- were significantly lower than those of wild-type tobacco. The expression level of stress-related genes in transgenic tobacco increased significantly, and the alkali tolerance was enhanced, but the opposite was true under drought stress. Our findings suggest that LpNAC6 has a reverse regulatory effect on alkaline and drought tolerance in plants, which is of great significance for plant screening and stress tolerance regulation of transgenic plants in arid saline-alkali land.
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Affiliation(s)
- Hao Yan
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Bin Liu
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Ying Cui
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Ying Wang
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Shaoying Sun
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Jingwen Wang
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Mengmeng Tan
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Yiping Wang
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Yanni Zhang
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China.
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2
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Lin L, Zhang D, Jin Q, Teng Y, Yao X, Zhao T, Xu X, Jin Y. Mutational Analysis of Mitochondrial tRNA Genes in 200 Patients with Type 2 Diabetes Mellitus. Int J Gen Med 2021; 14:5719-5735. [PMID: 34557026 PMCID: PMC8454214 DOI: 10.2147/ijgm.s330973] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 08/25/2021] [Indexed: 12/12/2022] Open
Abstract
Objective Previous studies showed that variants in mitochondrial DNA (mtDNA) are associated with type 2 diabetes mellitus (T2DM). However, the relationships between mitochondrial tRNA (mt-tRNA) variants and T2DM remain poorly understood. Methods In this study, we performed a mutational screening of 22 mt-tRNA genes in a cohort of 200 Han Chinese subjects with T2DM and 200 control subjects through PCR–Sanger sequencing. The identified mt-tRNA variants were assessed for their pathogenicity via the phylogenetic approach, structural and functional analysis. Furthermore, two Han Chinese pedigrees with maternally inherited diabetes and deafness (MIDD) were reported by clinical and genetic assessments. Results A total of 49 genetic variants in mt-tRNA genes were identified; among them, 31 variants (17 pathogenic/likely pathogenic) were absent in controls, located at extremely conserved nucleotides, may have potential structural and functional significance, thereby considered to be T2DM-associated variants. In addition, sequence analysis of entire mitochondrial genomes of the matrilineal relatives from two MIDD pedigrees revealed the occurrence of tRNALeu(UUR) A3243G and T3290C mutations, as well as sets of polymorphisms belonging to mitochondrial haplogroups F2 and D4. However, the lack of any functional variants in connexin 26 gene (GJB2) and tRNA 5-methylaminomethyl-2-thiouridylate (TRMU) suggested that nuclear genes may not play active roles in clinical expression of MIDD in these pedigrees. Conclusion Our data indicated that mt-tRNA variants were associated with T2DM, screening for mt-tRNA pathogenic mutations was recommended for early detection and prevention of mitochondrial diabetes.
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Affiliation(s)
- Liangyan Lin
- Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, People's Republic of China
| | - Dongdong Zhang
- Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, People's Republic of China
| | - Qingsong Jin
- Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, People's Republic of China
| | - Yaqin Teng
- Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, People's Republic of China
| | - Xiaoyan Yao
- Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, People's Republic of China
| | - Tiantian Zhao
- Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, People's Republic of China
| | - Xinmiao Xu
- Department of Endocrinology, Yantai Yeda Hospital, Yantai, Shandong, People's Republic of China
| | - Yongjun Jin
- Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, People's Republic of 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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4
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Jiang P, Ling Y, Zhu T, Luo X, Tao Y, Meng F, Cheng W, Ji Y. Mitochondrial tRNA mutations in Chinese Children with Tic Disorders. Biosci Rep 2020; 40:BSR20201856. [PMID: 33289513 PMCID: PMC7755120 DOI: 10.1042/bsr20201856] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 11/09/2020] [Accepted: 11/18/2020] [Indexed: 12/17/2022] Open
Abstract
AIMS To conduct the clinical, genetic and molecular characterization of 494 Han Chinese subjects with Tic disorders (TD). METHODS In this study, we performed the mutational analysis of 22 mitochondrial tRNA genes in a large cohort of 494 Han Chinese subjects with TD via Sanger sequencing. These variants were then assessed for their pathogenic potential via phylogenetic, functional, and structural analyses. RESULTS A total of 73 tRNA gene variants (49 known and 24 novel) on 22 tRNA genes were identified. Among these, 18 tRNA variants that were absent or present in <1% of 485 Chinese control patient samples were localized to highly conserved nucleotides, or changed the modified nucleotides, and had the potential structural to alter tRNA structure and function. These variants were thus considered to be TD-associated mutations. In total, 25 subjects carried one of these 18 putative TD-associated tRNA variants with the total prevalence of 4.96%. LIMITATIONS The phenotypic variability and incomplete penetrance of tic disorders in pedigrees carrying these tRNA mutations suggested the involvement of modifier factors, such as nuclear encoded genes associated mitochondrion, mitochondrial haplotypes, epigenetic and environmental factors. CONCLUSION Our data provide the evidence that mitochondrial tRNA mutations are the important causes of tic disorders among Chinese population. These findings also advance current understanding regarding the clinical relevance of tRNA mutations, and will guide future studies aimed at elucidating the pathophysiology of maternal tic disorders.
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Affiliation(s)
- Peifang Jiang
- Department of Neurology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center For Child Health, Hangzhou, China
| | - Yinjie Ling
- Department of Neurology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center For Child Health, Hangzhou, China
- Department of Pediatrics, First People’s Hospital of Huzhou, Huzhou, China
| | - Tao Zhu
- Department of Critical Care Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaoying Luo
- Department of Neurology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center For Child Health, Hangzhou, China
| | - Yilin Tao
- Department of Neurology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center For Child Health, Hangzhou, China
| | - Feilong Meng
- Division of Medical Genetics and Genomics, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Zhejiang, China
- Institute of Genetics, Zhejiang University, Hangzhou, Zhejiang, China
| | - Weixin Cheng
- Institute of Genetics, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yanchun Ji
- Division of Medical Genetics and Genomics, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Zhejiang, China
- Institute of Genetics, Zhejiang University, Hangzhou, Zhejiang, China
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5
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Wang JL, Ji YC, Fu JF. Novel mitochondrial tRNA Arg 10461A>G mutation in a pedigree with obesity. World J Pediatr 2020; 16:429-431. [PMID: 31953779 DOI: 10.1007/s12519-019-00334-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 12/30/2019] [Indexed: 01/25/2023]
Affiliation(s)
- Jin-Ling Wang
- Department of Endocrinology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, 310052, China
| | - Yan-Chun Ji
- Division of Medical Genetics and Genomics, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, 310052, China.,Institute of Genetics, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jun-Fen Fu
- Department of Endocrinology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, 310052, China.
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Zheng J, Bai X, Xiao Y, Ji Y, Meng F, Aishanjiang M, Gao Y, Wang H, Fu Y, Guan MX. Mitochondrial tRNA mutations in 887 Chinese subjects with hearing loss. Mitochondrion 2020; 52:163-172. [PMID: 32169613 DOI: 10.1016/j.mito.2020.03.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 01/13/2020] [Accepted: 03/09/2020] [Indexed: 01/24/2023]
Abstract
Mutations in the mitochondrial tRNAs have been reported to be the important cause of hearing loss. However, only a few cases have been identified thus far and the prevalence of mitochondrial tRNA mutations in hearing-impaired patients remain unclear. Here we performed the mutational analysis of 22 mitochondrial tRNA genes in a large cohort of 887 Han Chinese subjects with hearing loss by Sanger sequencing. The systemic evaluation of putative pathogenic variants was further carried out by frequency in controls (<1%), phylogenetic analysis, structural analysisandfunctionalprediction. As a result, a total of 147 variants on 22 tRNA genes were identified. Among these, 39 tRNA mutations (10 pathogenic and 29 likely pathogenic) which absent or present <1% in 773 Chinese controls, localized at highly conserved nucleotides, or changed the modified nucleotides, could have potential structural alterations and functional significance, thereby considered to be deafness-associated mutations. Furthermore, 44 subjects carried one of these 39 pathogenic/likely pathogenic tRNA mutations with a total prevalence of 4.96%. However, the phenotypic variability and incomplete penetrance of hearing loss in pedigrees carrying these tRNA mutations indicate the involvement of modifier factors, such as nuclear encoded genes associated with mitochondrion biogenesis, mitochondrial haplotypes, epigenetic and environmental factors. Thus, our data provide the evidence that mitochondrial tRNA mutations are the important causes of hearing loss among Chinese population. These findings further increase our knowledge on the clinical relevance of tRNA mutations in the mitochondrial genome, and should be helpful to elucidate the pathogenesis of maternal hearing loss.
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Affiliation(s)
- Jing Zheng
- Division of Medical Genetics and Genomics, and Department of Genetic and Metabolic Diseases, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang 310052, China; Institute of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Xiaohui Bai
- Department of Otorhinolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan, Shandong 250022, China
| | - Yun Xiao
- Division of Medical Genetics and Genomics, and Department of Genetic and Metabolic Diseases, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang 310052, China; Department of Otorhinolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan, Shandong 250022, China
| | - Yanchun Ji
- Division of Medical Genetics and Genomics, and Department of Genetic and Metabolic Diseases, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang 310052, China; Institute of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Feilong Meng
- Division of Medical Genetics and Genomics, and Department of Genetic and Metabolic Diseases, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang 310052, China; Institute of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Maerhaba Aishanjiang
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Yinglong Gao
- Division of Medical Genetics and Genomics, and Department of Genetic and Metabolic Diseases, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang 310052, China; Institute of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Haibo Wang
- Department of Otorhinolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital, Shandong University, Jinan, Shandong 250022, China.
| | - Yong Fu
- Division of Medical Genetics and Genomics, and Department of Genetic and Metabolic Diseases, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang 310052, China; Department of Otorhinolaryngology Head and Neck Surgery, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang 310052, China.
| | - Min-Xin Guan
- Division of Medical Genetics and Genomics, and Department of Genetic and Metabolic Diseases, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang 310052, China; Institute of Genetics, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
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7
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Sun D, Wei Y, Zheng HX, Jin L, Wang J. Contribution of Mitochondrial DNA Variation to Chronic Disease in East Asian Populations. Front Mol Biosci 2019; 6:128. [PMID: 31803756 PMCID: PMC6873657 DOI: 10.3389/fmolb.2019.00128] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 10/29/2019] [Indexed: 12/17/2022] Open
Abstract
Mitochondria are the main producers of energy in eukaryotic cells. Mitochondrial dysfunction is associated with specific mitochondrial DNA (mtDNA) variations (haplogroups), and these variations can contribute to human disease. East Asian populations show enrichment of many mitochondrial haplogroups, including A, B, D, G, M7, M8, M9, N9, R9, and exhibit half of the known haplogroups of worldwide. In this review, we summarize the current research in the field of mtDNA variation and associated disease in East Asian populations and discuss the physiological and pathological relevance of mitochondrial biology. mtDNA haplogroups are associated with various metabolic disorders ascribed to altered oxidative phosphorylation. The same mitochondrial haplogroup can show either a negative or positive association with different diseases. Mitochondrial dynamics, mitophagy, and mitochondrial oxidative stress, ultimately influence susceptibility to various diseases. In addition, mitochondrial retrograde signaling pathways may have profound effects on nuclear-mitochondrial interactions, affecting cellular morphology, and function. Other complex networks including proteostasis, mitochondrial unfolded protein response and reactive oxygen species signaling may also play pivotal roles in metabolic performance.
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Affiliation(s)
- Dayan Sun
- 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
| | - Yang Wei
- 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
| | - Hong-Xiang Zheng
- Ministry of Education Key Laboratory of Contemporary Anthropology, Department of Anthropology and Human Genetics, School of Life Sciences, 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
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8
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Mitochondrial Genome (mtDNA) Mutations that Generate Reactive Oxygen Species. Antioxidants (Basel) 2019; 8:antiox8090392. [PMID: 31514455 PMCID: PMC6769445 DOI: 10.3390/antiox8090392] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 09/09/2019] [Accepted: 09/09/2019] [Indexed: 01/07/2023] Open
Abstract
Mitochondria are critical for the energetic demands of virtually every cellular process within nucleated eukaryotic cells. They harbour multiple copies of their own genome (mtDNA), as well as the protein-synthesing systems required for the translation of vital subunits of the oxidative phosphorylation machinery used to generate adenosine triphosphate (ATP). Molecular lesions to the mtDNA cause severe metabolic diseases and have been proposed to contribute to the progressive nature of common age-related diseases such as cancer, cardiomyopathy, diabetes, and neurodegenerative disorders. As a consequence of playing a central role in cellular energy metabolism, mitochondria produce reactive oxygen species (ROS) as a by-product of respiration. Here we review the evidence that mutations in the mtDNA exacerbate ROS production, contributing to disease.
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9
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Zhou Z, Sun B, Huang S, Jia W, Yu D. The tRNA-associated dysregulation in diabetes mellitus. Metabolism 2019; 94:9-17. [PMID: 30711570 DOI: 10.1016/j.metabol.2019.01.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 01/26/2019] [Accepted: 01/30/2019] [Indexed: 12/26/2022]
Abstract
Diabetes mellitus (DM) is a complex endocrine and metabolic disorder for human health and well-being. Deregulated glucose and lipid metabolism are the primary underlying manifestations associated with this disease. Transfer RNAs (tRNAs) are considered to mainly participate in protein translation and may contribute to complex human pathologies. Although the molecular mechanisms remain, for the most part, unknown, accumulating evidence indicates that tRNAs play a vital role in the pathogenesis of DM. This paper reviews different aspects of tRNA-associated dysregulation in DM, such as tRNA mutations, tRNA modifications, tRNA aminoacylation and tRNA derivatives, aiming at a better understanding of the pathogenesis of DM and providing new ideas for the personalized treatment of this metabolism-associated disease.
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Affiliation(s)
- Zheng Zhou
- Department of Chinese Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Bao Sun
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha 410000, China; Hunan Key Laboratory of Pharmacogenetics, Institute of Clinical Pharmacology, Central South University, Changsha 410000, China
| | - Shiqiong Huang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha 410000, China; Hunan Key Laboratory of Pharmacogenetics, Institute of Clinical Pharmacology, Central South University, Changsha 410000, China
| | - Wenrui Jia
- Department of Chinese Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Dongsheng Yu
- Department of Chinese Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China.
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10
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Hahn A, Zuryn S. The Cellular Mitochondrial Genome Landscape in Disease. Trends Cell Biol 2018; 29:227-240. [PMID: 30509558 DOI: 10.1016/j.tcb.2018.11.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/06/2018] [Accepted: 11/09/2018] [Indexed: 12/18/2022]
Abstract
Mitochondrial genome (mitochondrial DNA, mtDNA) lesions that unbalance bioenergetic and oxidative outputs are an important cause of human disease. A major impediment in our understanding of the pathophysiology of mitochondrial disorders is the complexity with which mtDNA mutations are spatiotemporally distributed and managed within individual cells, tissues, and organs. Unlike the comparatively static nuclear genome, accumulating evidence highlights the variability, dynamism, and modifiability of the mtDNA nucleotide sequence between individual cells over time. In this review, we summarize and discuss the impact of mtDNA defects on disease within the context of a mosaic and shifting mutational landscape.
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Affiliation(s)
- Anne Hahn
- The University of Queensland, Queensland Brain Institute, Clem Jones Centre for Ageing Dementia Research, Brisbane, Australia
| | - Steven Zuryn
- The University of Queensland, Queensland Brain Institute, Clem Jones Centre for Ageing Dementia Research, Brisbane, Australia.
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11
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The Mitochondrial tRNA Gly T10003C Mutation may not be Associated with Diabetes Mellitus. Balkan J Med Genet 2018; 21:53-57. [PMID: 30425911 PMCID: PMC6231318 DOI: 10.2478/bjmg-2018-0006] [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: 11/20/2022] Open
Abstract
Mitochondrial DNA (mtDNA) mutations have long been proposed to play important roles in the pathogenesis of diabetes mellitus (DM). A large proportion of these mutations are localized at the mt-tRNA genes. Owing to its high mutation rate, a growing number of mt-tRNA mutations have been reported; however some of them are neutral genetic polymorphisms and will not result in the alteration of the mitochondrial function responsible for DM. In this study, we reassessed a recent reported "pathogenic" mutation, tRNAGly T10003C, in a clinical manifestation of DM. We first performed the conservation assessment of this mutation between different species. Moreover, the bioinformatics analysis was used to predict the secondary structure of mt-tRNAGly in wild type version and the mutant carrying the T10003C mutation. We also screened the presence of the T10003C mutation in 500 unrelated DM patients and 300 healthy controls. We noticed that the T10003C mutation was not very conserved and did not cause the secondary structure change of mt-tRNAGly. Moreover, this mutation was absent in the 500 unrelated DM patients and controls, suggesting that this mutation may be a rare event in the human population. In conclusion, the current study showed no association between the T10003C mutation and DM in humans.
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