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Kamfar S, Danaei B, Rahimi S, Zeinali V. Novel blood and tissue-based mitochondrial D-loop mutations detected in an Iranian NAFLD patient cohort. Mitochondrion 2024; 77:101888. [PMID: 38697590 DOI: 10.1016/j.mito.2024.101888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 04/24/2024] [Accepted: 04/28/2024] [Indexed: 05/05/2024]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is an increasingly prevalent chronic liver disease characterized by an elusive etiology. In its advanced stages, this condition can pose life-threatening implications. Mitochondrial dysfunction due to its impact on hepatic lipid homeostasis, cytokine release, ROS production, and cell death, contributes to the pathogenesis of NAFLD. Previous research reveals a direct link between NAFLD genetic predictors and mitochondrial dysfunction. The emphasis on the D-loop stems from its association with impaired mtDNA replication, underscoring its crucial role in NAFLD progression. We included 38 Iranian NAFLD patients (comprising 16 patients with non-alcoholic fatty liver [NAFL] and 22 patients with non-alcoholic steatohepatitis [NASH]), with matched blood and liver tissue samples collected from each to compare variations in the mitochondrial D-loop sequence within samples. The mitochondrial DNA (mtDNA) D-loop region was amplified using PCR, and variations were identified through sequencing. The resultant sequences were compared with the reference sequence of human mtDNA available in the MITOMAP Database for comparative analysis. In this study, 97 somatic mutations in the mtDNA D-loop region were identified in NAFLD patients. Our study revealed significant difference between the NAFLD patients and control group in 13 detected mutations (P ≤ 0.05). Novel mutations were discovered in hepatic tissues, while mutation 16220-16221ins C was found in both tissues and blood. A significant difference was found in the distribution of D310 and mt514-mt523 (CA)n repeat variations between NAFLD patients and the control group (P < 0.001). C to T and T to C transitions were the prevalent substitution among patients. Identification of the 16220-16221ins C mutation in both blood and tissue samples from NAFLD patients holds substantial promise as a potential diagnostic marker. However, further research is imperative to corroborate these findings.
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Affiliation(s)
- Sharareh Kamfar
- Pediatric Congenital Hematologic Disorders Research Center, Research Institute for Children's Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Bardia Danaei
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Men's Health and Reproductive Health Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Samane Rahimi
- Department of Pediatric Emergency Medicine, School of Medicine, Mofid Children's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Vahide Zeinali
- Research Institute for Children's Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Houshmand M, Zeinali V, Hosseini A, Seifi A, Danaei B, Kamfar S. Investigation of FGF21 mRNA levels and relative mitochondrial DNA copy number levels and their relation in nonalcoholic fatty liver disease: a case-control study. Front Mol Biosci 2023; 10:1203019. [PMID: 37347041 PMCID: PMC10279952 DOI: 10.3389/fmolb.2023.1203019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 05/22/2023] [Indexed: 06/23/2023] Open
Abstract
Background: Although the exact mechanisms of nonalcoholic fatty liver disease (NAFLD) are not fully understood, numerous pieces of evidence show that the variations in mitochondrial DNA (mtDNA) level and hepatic Fibroblast growth factor 21 (FGF21) expression may be related to NAFLD susceptibility. Objectives: The main objective of this study was to determine relative levels of mtDNA copy number and hepatic FGF21 expression in a cohort of Iranian NAFLD patients and evaluate the possible relationship. Methods: This study included 27 NAFLD patients (10 with nonalcoholic fatty liver (NAFL) and 17 with non-alcoholic steatohepatitis (NASH)) and ten healthy subjects. Total RNA and genomic DNA were extracted from liver tissue samples, and then mtDNA copy number and FGF21 expression levels were assessed by quantitative real-time PCR. Results: The relative level of hepatic mtDNA copy number was 3.9-fold higher in patients than in controls (p < 0.0001). NAFLD patients showed a 2.9-fold increase in hepatic FGF21 expression compared to controls (p < 0.013). Results showed that hepatic FGF21 expression was positively correlated with BMI, serum ALT, and AST levels (p < 0.05). The level of mitochondrial copy number and hepatic FGF21 expression was not significantly associated with stages of change in hepatic steatosis. Finally, there was a significant correlation between FGF21 expression and mitochondrial copy number in NAFLD patients (p = 0.027). Conclusion: Our findings suggest a considerable rise of hepatic FGF21 mRNA levels and mtDNA-CN and show a positive correlation between them in the liver tissue of NAFLD patients.
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Affiliation(s)
- Massoud Houshmand
- Department of Medical Genetics, National Institute for Genetic Engineering and Biotechnology, Tehran, Iran
| | - Vahide Zeinali
- Research Institute for Children’s Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amirhossein Hosseini
- Pediatric Gastroenterology, Hepatology, and Nutrition Research Center, Research Institute for Children’s Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Atena Seifi
- Pediatric Nephrology Research Center, Research Institute for Children’s Health, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Bardia Danaei
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sharareh Kamfar
- Pediatric Congenital Hematologic Disorders Research Center, Research Institute for Children’s Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Hu Y, Zhang X, Wang O, Xing X, Cui M, Wang M, Song C, Liao Q. Spectrum of mitochondrial genomic variation in parathyroid neoplasms. Endocrine 2021; 74:690-697. [PMID: 34296389 DOI: 10.1007/s12020-021-02825-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 07/10/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE Mitochondrial DNA (mtDNA) variations have been implicated in various cancer types. Several attempts have been made in benign parathyroid adenoma (PA); however, mtDNA variants and copy number alterations have not been investigated in parathyroid carcinoma (PC). The present study aimed to explore the variations in the mitochondrial genome in parathyroid neoplasms. METHODS In this study, ultradeep targeted sequencing of mtDNA was performed in 12 cases with PC and 25 cases with PA. Germline and somatic variants in the mitochondrial genome were analysed according to clinical features. The mtDNA copy number relative to nuclear DNA was measured. RESULTS A total of 821 germline variants and 23 somatic mutations were identified. All 160 germline nonsynonymous variants in the coding sequence (CDS) were predicted to be likely benign, and germline variants frequently occurred (26.3%) in the displacement loop region. Tumour somatic mutation in a CDS with heteroplasmic factor (HF) >0.8 showed a higher mtDNA copy number (p = 0.039). Using Spearman's rank test, tumour mtDNA copy number revealed a positive correlation with serum levels of intact parathyroid hormone and calcium. CONCLUSION Our results demonstrate that null recurrent mtDNA mutational hotspots were PC specific. An increased mtDNA copy number in parathyroid neoplasms was associated with somatic CDS mutations with a high HF and major clinical features. Larger cohort investigations should be performed in future analyses.
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Affiliation(s)
- Ya Hu
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xiang Zhang
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Ou Wang
- Department of Endocrinology, Laboratory of Endocrinology, National Health Commission, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xiaoping Xing
- Department of Endocrinology, Laboratory of Endocrinology, National Health Commission, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Ming Cui
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Mengyi Wang
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Chengli Song
- Novogene Bioinformatics Institute, Beijing, China
| | - Quan Liao
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
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Zhang C, Xue Y, Wang L, Wu Q, Fang B, Sheng Y, Bai H, Peng B, Yang N, Li L. Progress on the Physiological Function of Mitochondrial DNA and Its Specific Detection and Therapy. Chembiochem 2021; 23:e202100474. [PMID: 34661371 DOI: 10.1002/cbic.202100474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 10/16/2021] [Indexed: 11/10/2022]
Abstract
Mitochondrial DNA (mtDNA) is the genetic information of mitochondrion, and its structure is circular double-stranded. Despite the diminutive size of the mitochondrial genome, mtDNA mutations are an important cause of mitochondrial diseases which are characterized by defects in oxidative phosphorylation (OXPHOS). Mitochondrial diseases are involved in multiple systems, particularly in the organs that are highly dependent on aerobic metabolism. The diagnosis of mitochondrial disease is more complicated since mtDNA mutations can cause various clinical symptoms. To realize more accurate diagnosis and treatment of mitochondrial diseases, the detection of mtDNA and the design of drugs acting on it are extremely important. Over the past few years, many probes and therapeutic drugs targeting mtDNA have been developed, making significant contributions to fundamental research including elucidation of the mechanisms of mitochondrial diseases at the genetic level. In this review, we summarize the structure, function, and detection approaches for mtDNA. The most current topics in this field, such as mechanistic exploration and treatment of mtDNA mutation-related disorders, are also reviewed. Specific attention is given to discussing the design and development of these probes and drugs for mtDNA. We hope that this review will provide readers with a comprehensive understanding of the importance of mtDNA, and promote the development of effective molecules for theragnosis of mtDNA mutation-related diseases.
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Affiliation(s)
- Congcong Zhang
- Key Laboratory of Flexible Electronics (KLOFE) and, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Yufei Xue
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and, Xi'an Institute of Biomedical Materials and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Lan Wang
- Key Laboratory of Flexible Electronics (KLOFE) and, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Qiong Wu
- Key Laboratory of Flexible Electronics (KLOFE) and, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Bin Fang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and, Xi'an Institute of Biomedical Materials and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Yu Sheng
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and, Xi'an Institute of Biomedical Materials and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Hua Bai
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and, Xi'an Institute of Biomedical Materials and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Bo Peng
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and, Xi'an Institute of Biomedical Materials and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Naidi Yang
- Key Laboratory of Flexible Electronics (KLOFE) and, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Lin Li
- Key Laboratory of Flexible Electronics (KLOFE) and, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), 30 South Puzhu Road, Nanjing, 211816, P. R. China.,The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen, 361005, Fujian, P. R. China
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Zhunina OA, Yabbarov NG, Grechko AV, Starodubova AV, Ivanova E, Nikiforov NG, Orekhov AN. The Role of Mitochondrial Dysfunction in Vascular Disease, Tumorigenesis, and Diabetes. Front Mol Biosci 2021; 8:671908. [PMID: 34026846 PMCID: PMC8138126 DOI: 10.3389/fmolb.2021.671908] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 04/14/2021] [Indexed: 12/16/2022] Open
Abstract
Mitochondrial dysfunction is known to be associated with a wide range of human pathologies, such as cancer, metabolic, and cardiovascular diseases. One of the possible ways of mitochondrial involvement in the cellular damage is excessive production of reactive oxygen and nitrogen species (ROS and RNS) that cannot be effectively neutralized by existing antioxidant systems. In mitochondria, ROS and RNS can contribute to protein and mitochondrial DNA (mtDNA) damage causing failure of enzymatic chains and mutations that can impair mitochondrial function. These processes further lead to abnormal cell signaling, premature cell senescence, initiation of inflammation, and apoptosis. Recent studies have identified numerous mtDNA mutations associated with different human pathologies. Some of them result in imbalanced oxidative phosphorylation, while others affect mitochondrial protein synthesis. In this review, we discuss the role of mtDNA mutations in cancer, diabetes, cardiovascular diseases, and atherosclerosis. We provide a list of currently described mtDNA mutations associated with each pathology and discuss the possible future perspective of the research.
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Affiliation(s)
- Olga A. Zhunina
- Chemical Biology Department, Russian Research Center for Molecular Diagnostics and Therapy, Moscow, Russia
| | - Nikita G. Yabbarov
- Chemical Biology Department, Russian Research Center for Molecular Diagnostics and Therapy, Moscow, Russia
| | - Andrey V. Grechko
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, Moscow, Russia
| | | | - Ekaterina Ivanova
- Department of Basic Research, Skolkovo Innovative Center, Institute for Atherosclerosis Research, Moscow, Russia
| | - Nikita G. Nikiforov
- National Medical Research Center of Cardiology, Institute of Experimental Cardiology, Moscow, Russia
- Institute of Gene Biology, Moscow, Russia
- Laboratory of Cellular and Molecular Pathology of Cardiovascular System, Institute of Human Morphology, Moscow, Russia
| | - Alexander N. Orekhov
- Laboratory of Cellular and Molecular Pathology of Cardiovascular System, Institute of Human Morphology, Moscow, Russia
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, Moscow, Russia
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Zaidieh T, Smith JR, Ball KE, An Q. Mitochondrial DNA abnormalities provide mechanistic insight and predict reactive oxygen species-stimulating drug efficacy. BMC Cancer 2021; 21:427. [PMID: 33865346 PMCID: PMC8053302 DOI: 10.1186/s12885-021-08155-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 04/06/2021] [Indexed: 11/16/2022] Open
Abstract
Background Associations between mitochondrial genetic abnormalities (variations and copy number, i.e. mtDNAcn, change) and elevated ROS have been reported in cancer compared to normal cells. Since excessive levels of ROS can trigger apoptosis, treating cancer cells with ROS-stimulating agents may enhance their death. This study aimed to investigate the link between baseline ROS levels and mitochondrial genetic abnormalities, and how mtDNA abnormalities might be used to predict cancer cells’ response to ROS-stimulating therapy. Methods Intracellular and mitochondrial specific-ROS levels were measured using the DCFDA and MitoSOX probes, respectively, in four cancer and one non-cancerous cell lines. Cells were treated with ROS-stimulating agents (cisplatin and dequalinium) and the IC50s were determined using the MTS assay. Sanger sequencing and qPCR were conducted to screen the complete mitochondrial genome for variations and to relatively quantify mtDNAcn, respectively. Non-synonymous variations were subjected to 3-dimensional (3D) protein structural mapping and analysis. Results Our data revealed novel significant associations between the total number of variations in the mitochondrial respiratory chain (MRC) complex I and III genes, mtDNAcn, ROS levels, and ROS-associated drug response. Furthermore, functional variations in complexes I/III correlated significantly and positively with mtDNAcn, ROS levels and drug resistance, indicating they might mechanistically influence these parameters in cancer cells. Conclusions Our findings suggest that mtDNAcn and complexes I/III functional variations have the potential to be efficient biomarkers to predict ROS-stimulating therapy efficacy in the future. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-021-08155-2.
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Affiliation(s)
- Tarek Zaidieh
- School of Pharmacy and Biomedical Sciences, Institute of Biological and Biomedical Sciences, University of Portsmouth, St Michael's Building, White Swan Road, Portsmouth, PO1 2DT, UK. .,Institute of Life Science, Swansea University Medical School, Swansea, SA2 8PP, UK.
| | - James R Smith
- School of Pharmacy and Biomedical Sciences, Institute of Biological and Biomedical Sciences, University of Portsmouth, St Michael's Building, White Swan Road, Portsmouth, PO1 2DT, UK
| | - Karen E Ball
- School of Pharmacy and Biomedical Sciences, Institute of Biological and Biomedical Sciences, University of Portsmouth, St Michael's Building, White Swan Road, Portsmouth, PO1 2DT, UK
| | - Qian An
- School of Pharmacy and Biomedical Sciences, Institute of Biological and Biomedical Sciences, University of Portsmouth, St Michael's Building, White Swan Road, Portsmouth, PO1 2DT, UK.
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Wei YH, Chuang TY, Chang TW, Chen SS, Chang CC, Cheng WM. Mitochondrial dysfunction in patients with urogenital disease. UROLOGICAL SCIENCE 2021. [DOI: 10.4103/uros.uros_47_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Mojarrad M, Moghbeli M. Genetic and molecular biology of bladder cancer among Iranian patients. Mol Genet Genomic Med 2020; 8:e1233. [PMID: 32253828 PMCID: PMC7284045 DOI: 10.1002/mgg3.1233] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 02/16/2020] [Accepted: 03/09/2020] [Indexed: 12/12/2022] Open
Abstract
Background Bladder cancer (BC) is the sixth common cancer among Iranians. Various risk factors such as smoking, body mass index, chronic infection, age, and genetic factors are associated with BC progression. Methods It has been shown that a significant ratio of patients have tumors with muscle bladder layer invasion and poor prognosis at the time of diagnosis. Therefore, the early detection of tumors is required to reduce the mortality rate of BC cases. Since there is a wide geographical incidence variation in BC in Iran, it seems that the ethnic and genetic factors can be the main risk factors among Iranian BC patients. Results For the first time, in present review we have summarized all of the reported genes among Iranian BC patients until now which were significantly associated with tumorigenesis. Moreover, we categorized all of the reported genes based on their cell and molecular functions to clarify the genetic and molecular biology of BC among Iranian population. Conclusion This review paves the way of determination of a population‐based genetic panel markers for the early detection of BC in this population.
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Affiliation(s)
- Majid Mojarrad
- Department of Medical Genetics and Molecular Medicine, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Meysam Moghbeli
- Department of Medical Genetics and Molecular Medicine, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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Altafi D, Sadeghi S, Hojatian H, Torabi Afra M, Pakizeh Kar S, Gorji M, Houshmand M. Mitochondrial Polymorphisms, in The D-Loop Area, Are Associated with Brain Tumors. CELL JOURNAL 2019; 21:350-356. [PMID: 31210442 PMCID: PMC6582428 DOI: 10.22074/cellj.2019.5947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Accepted: 10/29/2018] [Indexed: 11/18/2022]
Abstract
Objective This study was carried out to evaluate the relationship between mtDNA D-loop variations and the
pathogenesis of a brain tumor.
Materials and Methods In this experimental study, 25 specimens of brain tumor tissue with their adjacent tissues
from patients and 454 blood samples from different ethnic groups of the Iranian population, as the control group, were
analysed by the polymerase chain reaction (PCR)-sequencing method.
Results Thirty-six variations of the D-loop area were observed in brain tumor tissues as well as the adjacent normal
tissues. A significant difference of A750G (P=0.046), T15936C (P=0.013), C15884G (P=0.013), C16069T (P=0.049),
T16126C (P=0.006), C16186T (P=0.022), T16189C (P=0.041), C16193T (P=0.045), C16223T (P=0.001), T16224C
(P=0.013), C16234T (P=0.013), G16274A (P=0.009), T16311C (P=0.038), C16327T (P=0.045), C16355T (P=0.003),
T16362C (P=0.006), G16384A (P=0.042), G16392A (P=0.013), G16394A (P=0.013), and G16477A (P=0.013) variants
was found between the patients and the controls.
Conclusion The results indicated individuals with C16069T [odds ratio (OR): 2.048], T16126C (OR: 2.226), C16186T
(OR: 3.586), G16274A (OR: 4.831), C16355T (OR: 7.322), and T16362C (OR: 6.682) variants with an OR more than
one are probably associated with a brain tumor. However, given the multifactorial nature of cancer, more investigation
needs to be done to confirm this association.
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Affiliation(s)
- Donya Altafi
- Molecular Biology Department, NourDanesh Institute of Higher Education, Esfahan, Iran. Electronic Address:
| | - Soha Sadeghi
- Molecular Biology Department, NourDanesh Institute of Higher Education, Esfahan, Iran
| | - Hamed Hojatian
- Molecular Biology Department, NourDanesh Institute of Higher Education, Esfahan, Iran
| | - Maryam Torabi Afra
- Molecular Biology Department, NourDanesh Institute of Higher Education, Esfahan, Iran
| | | | - Mojtaba Gorji
- Department of Hematology and Oncology, Lorestan Medical University, Lorestan, Iran
| | - Massoud Houshmand
- Department of Medical Genetics, National Institutes for Genetic Engineering and Biotechnology, Tehran, Iran.,Research Center, Knowledge University, Erbil, Kurdistan Region, Iraq.Electronic Address:
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Kamfar S, Alavian SM, Hasrak K, Houshmand M, Seifi Zarei B, Khalaj A, Homaunpur F, Saidijam M. Analysis of Mitochondrial 4977-bp Deletion and D-Loop Variation in Iranian Non-Alcoholic Fatty Liver Disease Patients. HEPATITIS MONTHLY 2019; In Press. [DOI: 10.5812/hepatmon.84553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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Jiménez-Morales S, Pérez-Amado CJ, Langley E, Hidalgo-Miranda A. Overview of mitochondrial germline variants and mutations in human disease: Focus on breast cancer (Review). Int J Oncol 2018; 53:923-936. [PMID: 30015870 DOI: 10.3892/ijo.2018.4468] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/18/2018] [Indexed: 11/06/2022] Open
Abstract
High lactate production in cells during growth under oxygen-rich conditions (aerobic glycolysis) is a hallmark of tumor cells, indicating the role of mitochondrial function in tumorigenesis. In fact, enhanced mitochondrial biogenesis and impaired quality control are frequently observed in cancer cells. Mitochondrial DNA (mtDNA) encodes 13 subunits of oxidative phosphorylation (OXPHOS), is present in thousands of copies per cell, and has a very high mutation rate. Mutations in mtDNA and nuclear DNA (nDNA) genes encoding proteins that are important players in mitochondrial biogenesis and function are involved in oncogenic processes. A wide range of germline mtDNA polymorphisms, as well as tumor mtDNA somatic mutations have been identified in diverse cancer types. Approximately 72% of supposed tumor-specific somatic mtDNA mutations reported, have also been found as polymorphisms in the general population. The ATPase 6 and NADH dehydrogenase subunit genes of mtDNA are the most commonly mutated genes in breast cancer (BC). Furthermore, nuclear genes playing a role in mitochondrial biogenesis and function, such as peroxisome proliferators-activated receptor gamma coactivator-1 (PGC-1), fumarate hydratase (FH) and succinate dehydrogenase (SDH) are frequently mutated in cancer. In this review, we provide an overview of the mitochondrial germline variants and mutations in cancer, with particular focus on those found in BC.
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Affiliation(s)
- Silvia Jiménez-Morales
- Laboratory of Cancer Genomics, National Institute of Genomic Medicine, 14610 Mexico City, Mexico
| | - Carlos J Pérez-Amado
- Biochemistry Sciences Program, National Autonomous University of Mexico, 04510 Mexico City, Mexico
| | - Elizabeth Langley
- Department of Basic Research, National Cancer Institute, 14080 Mexico City, Mexico
| | - Alfredo Hidalgo-Miranda
- Laboratory of Cancer Genomics, National Institute of Genomic Medicine, 14610 Mexico City, Mexico
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Meta-analysis of mitochondrial T16189C polymorphism for cancer and Type 2 diabetes risk. Clin Chim Acta 2018; 482:136-143. [PMID: 29627487 DOI: 10.1016/j.cca.2018.03.041] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 03/30/2018] [Accepted: 03/30/2018] [Indexed: 11/23/2022]
Abstract
AIM Whereas many previous studies have revealed that mitochondrial DNA (mtDNA) polymorphism T16189C is associated with the risk of cancer and Type 2 diabetes mellitus (T2DM), there are others that have disputed the same. As a result, clarity on the role of mitochondrial T16189C in these disorders is missing. The aim of this study is to evaluate the association of T16189C polymorphism with the risk of cancer and T2DM development by pooling all case-control studies available. METHODS Published studies till November 2017 were searched from PubMed, Google scholar, Google and EMBASE and isolated a total of 36 studies having 44,203 subjects (20,439 cases and 23,764 controls) based on strict inclusion and exclusion criteria. We used the statistical software "R" to calculate the Pooled Odds Ratios and 95% confidence intervals to evaluate the association of T16189C polymorphism with a possible risk towards cancer and T2DM development. RESULT From the meta-analysis, we obtained Pooled Odds Ratios using Random effect model for cancer (OR: 1.20, 95% CI: 0.96-1.49, P = 0.104) and for T2DM (OR: 1.22, 95% CI: 1.09-1.36, P = 0.0004). In the subgroup analysis with Random effect model, we found that both Asians and Caucasians were at a statistically significant risk (OR: 1.25, P < 0.0001 and OR: 1.20, P < 0.0001, respectively) for the development of T2DM, whereas, a statistically non-significant risk (OR: 1.28 P = 0.1965 and OR: 1.16, P = 0.1148) emerged for the development of cancer. There was no evidence of a significant publication bias (Egger's and Begg's test) in this meta-analysis. Further sensitivity analysis also demonstrated that our meta-analysis was relatively stable and credible. CONCLUSION Individuals with 'C' allele at position 16,189 within the mitochondrial D-loop are seemingly at a higher risk of developing T2DM and cancer. However, before arriving at generalizations, it would be pertinent to conduct similar studies in different populations with larger numbers to corroborate these results, especially in cancer.
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Liu Z, Chai T, Zhang Y, Chu A, Liang B, Guo X, Guo Z, Song R, Hou G, Yuan J, Liu Y, Zhang Y. Identification of abnormal nuclear and mitochondrial genes in esophageal cancer cells. Mol Med Rep 2017; 17:2817-2826. [PMID: 29257265 PMCID: PMC5783496 DOI: 10.3892/mmr.2017.8228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 05/26/2017] [Indexed: 12/28/2022] Open
Abstract
The present study aimed to detect the mutation characteristics of mitochondrial DNA (mtDNA) in Eca109 of Ec9706 cells, and to investigate their association with the nuclear genome (nDNA), thus providing a basis for gene targeting therapies for esophageal squamous cell carcinoma (ESCC). In vitro-cultured Ec9706 and Eca109 cells were analyzed the changes of single-nucleotide polymorphisms (SNPs), insertions/deletions (INDELs), copy number variation, and structure variation (SV) of their genome by high-throughput sequencing. The loci with SV on chromosome 1–12 of the two ESCC cell lines were ≥5% of the mtDNA, but SV on chromosome 13–22, X and Y was ≤3%; >40% of loci exhibited gain or loss; intergenic loci with INDEL changes and SNP features accounted for the majority of mutations. The affected genes encoded proteins including nDNA-encoding intra-mitochondrial-transporting proteins, ATP energy generation-associated proteins and mitochondrial electron respiratory chain proteins, and these proteins were all nucleus-encoded mitochondrial proteins. The transcription, duplication, and translation of the abnormally expressed mtDNA in Ec9706 and Eca109 cells were closely associated with disorders of nuclear DNA products.
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Affiliation(s)
- Zongwen Liu
- Department of Radiotherapy, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Ting Chai
- Department of Oncology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Yan Zhang
- Department of Pharmacology, School of Basic Medical of Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Alan Chu
- Department of Radiotherapy, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Bing Liang
- Department of Oncology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Xing Guo
- Department of Radiotherapy, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Zhenjiang Guo
- Department of Radiotherapy, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Rui Song
- Department of Radiotherapy, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Ge Hou
- Department of Radiotherapy, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Jinjin Yuan
- Department of Radiotherapy, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Yaohe Liu
- Department of Radiotherapy, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Yuhao Zhang
- Department of Obstetrics and Gynecology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
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Cormio A, Sanguedolce F, Musicco C, Pesce V, Calò G, Bufo P, Carrieri G, Cormio L. Mitochondrial dysfunctions in bladder cancer: Exploring their role as disease markers and potential therapeutic targets. Crit Rev Oncol Hematol 2017; 117:67-72. [DOI: 10.1016/j.critrevonc.2017.07.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 07/02/2017] [Indexed: 01/19/2023] Open
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15
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Falah M, Farhadi M, Kamrava SK, Mahmoudian S, Daneshi A, Balali M, Asghari A, Houshmand M. Association of genetic variations in the mitochondrial DNA control region with presbycusis. Clin Interv Aging 2017; 12:459-465. [PMID: 28424544 PMCID: PMC5344408 DOI: 10.2147/cia.s123278] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Background The prominent role of mitochondria in the generation of reactive oxygen species, cell death, and energy production contributes to the importance of this organelle in the intracellular mechanism underlying the progression of the common sensory disorder of the elderly, presbycusis. Reduced mitochondrial DNA (mtDNA) gene expression and coding region variation have frequently been reported as being associated with the development of presbycusis. The mtDNA control region regulates gene expression and replication of the genome of this organelle. To comprehensively understand of the role of mitochondria in the progression of presbycusis, we compared variations in the mtDNA control region between subjects with presbycusis and controls. Methods A total of 58 presbycusis patients and 220 control subjects were enrolled in the study after examination by the otolaryngologist and audiology tests. Variations in the mtDNA control region were investigated by polymerase chain reaction and Sanger sequencing. Results A total of 113 sequence variants were observed in mtDNA, and variants were detected in 100% of patients, with 84% located in hypervariable regions. The frequencies of the variants, 16,223 C>T, 16,311 T>C, 16,249 T>C, and 15,954 A>C, were significantly different between presbycusis and control subjects. Conclusion The statistically significant difference in the frequencies of four nucleotide variants in the mtDNA control region of presbycusis patients and controls is in agreement with previous experimental evidence and supports the role of mitochondria in the intracellular mechanism underlying presbycusis development. Moreover, these variants have potential as diagnostic markers for individuals at a high risk of developing presbycusis. The data also suggest the possible presence of changes in the mtDNA control region in presbycusis, which could alter regulatory factor binding sites and influence mtDNA gene expression and copy number.
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Affiliation(s)
- Masoumeh Falah
- ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Farhadi
- ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Kamran Kamrava
- ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences, Tehran, Iran
| | - Saeid Mahmoudian
- ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences, Tehran, Iran
| | - Ahmad Daneshi
- ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences, Tehran, Iran
| | - Maryam Balali
- ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences, Tehran, Iran
| | - Alimohamad Asghari
- Skull Base Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Massoud Houshmand
- ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences, Tehran, Iran.,Department of Medical Genetics, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
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16
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Mitochondrial control region and GSTP1 polymorphism associated with familial urinary bladder cancer in Karbi-Anglong tribe of Assam, Northeast India. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2017. [DOI: 10.1016/j.ejmhg.2016.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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17
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Qian M, Spada C, Wang X. Approach, Application, and Bioethics of mtDNA Sequencing in Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1038:23-38. [DOI: 10.1007/978-981-10-6674-0_3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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18
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Bahreini F, Houshmand M, Modaresi MH, Tonekaboni H, Nafissi S, Nazari F, Akrami SM. Mitochondrial Copy Number and D-Loop Variants in Pompe Patients. CELL JOURNAL 2016; 18:405-15. [PMID: 27602323 PMCID: PMC5011329 DOI: 10.22074/cellj.2016.4569] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 01/24/2016] [Indexed: 02/06/2023]
Abstract
Objective Pompe disease is a rare neuromuscular genetic disorder and is classified
into two forms of early and late-onset. Over the past two decades, mitochondrial abnor-
malities have been recognized as an important contributor to an array of neuromuscular
diseases. We therefore aimed to compare mitochondrial copy number and mitochondrial
displacement-loop sequence variation in infantile and adult Pompe patients.
Materials and Methods In this retrospective study, the mitochondrial D-loop sequence
was analyzed by polymerase chain reaction (PCR) and direct sequencing to detect pos-
sible variation in 28 Pompe patients (17 infants and 11 adults). Results were compared
with 100 healthy controls and sequences of all individuals were compared with the Cam-
bridge reference sequence. Real-time PCR was used to quantify mitochondrial DNA copy
number.
Results Among 59 variants identified, 37(62.71%) were present in the infant group,
14(23.333%) in the adult group and 8(13.333%) in both groups. Mitochondrial copy
number in infant patients was lower than adults (P<0.05). A significant frequency differ-
ence was seen between the two groups for 12 single nucleotide polymorphism (SNP).
A novel insertion (317-318 ins CCC) was observed in patients and six SNPs were iden-
tified as neutral variants in controls. There was an inverse association between mito-
chondrial copy number and D-loop variant number (r=0.54).
Conclusion The 317-318 ins CCC was detected as a new mitochondrial variant in
Pompe patients.
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Affiliation(s)
- Fatemeh Bahreini
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Massoud Houshmand
- Department of Medical Genetic, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Mohammad Hossein Modaresi
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hassan Tonekaboni
- Department of Pediatric Neurology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shahriar Nafissi
- Iranian Center for Neurological Research, Tehran University of Medical Sciences, Tehran, Iran
| | - Ferdoss Nazari
- Iranian Center for Neurological Research, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Mohammad Akrami
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Balali M, Kamalidehghan B, Farhadi M, Ahmadipour F, Ashkezari MD, Hemami MR, Arabzadeh H, Falah M, Meng GY, Houshmand M. Association of nuclear and mitochondrial genes with audiological examinations in Iranian patients with nonaminoglycoside antibiotics-induced hearing loss. Ther Clin Risk Manag 2016; 12:117-28. [PMID: 26889084 PMCID: PMC4743636 DOI: 10.2147/tcrm.s90581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Mitochondrial DNA mutations play an important role in causing sensorineural hearing loss. The purpose of this study was to determine the association of the mitochondrial genes RNR1, MT-TL1, and ND1 as well as the nuclear genes GJB2 and GJB6 with audiological examinations in nonfamilial Iranians with cochlear implants, using polymerase chain reaction, DNA sequencing, and RNA secondary structure analysis. We found that there were no novel mutations in the mitochondrial gene 12S rRNA (MT-RNR1) in patients with and without GJB2 mutation (GJB2+ and GJB2−, respectively), but a total of six polymorphisms were found. No mutations were observed in tRNALeu(UUR) (MT-TL1). Furthermore, eight polymorphisms were found in the mitochondrial ND1 gene. Additionally, no mutations were observed in the nuclear GJB6 gene in patients in the GJB2− and GJB2+ groups. The speech intelligibility rating and category of auditory perception tests were statistically assessed in patients in the GJB2− and GJB2+ groups. The results indicated that there was a significant difference (P<0.05) between the categories of auditory perception score in the GJB2− group compared to that in the GJB2+ group. Successful cochlear implantation was observed among individuals with GJB2 mutations (GJB2+) and mitochondrial polymorphisms compared to those without GJB2 mutations (GJB2−). In conclusion, the outcome of this study suggests that variation in the mitochondrial and nuclear genes may influence the penetrance of deafness. Therefore, further genetic and functional studies are required to help patients in making the best choice for cochlear implants.
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Affiliation(s)
- Maryam Balali
- Department of Biology, Islamic Azad University, Ashkezar Branch, Ashkezar, Iran; Department and Research Centre of ENT and Head & Neck Surgery, Iran University of Medical Sciences, Tehran, Iran
| | - Behnam Kamalidehghan
- Medical Genetics Department, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Mohammad Farhadi
- Department and Research Centre of ENT and Head & Neck Surgery, Iran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Ahmadipour
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | | | - Mohsen Rezaei Hemami
- Department and Research Centre of ENT and Head & Neck Surgery, Iran University of Medical Sciences, Tehran, Iran
| | - Hossein Arabzadeh
- Department and Research Centre of ENT and Head & Neck Surgery, Iran University of Medical Sciences, Tehran, Iran
| | - Masoumeh Falah
- Department and Research Centre of ENT and Head & Neck Surgery, Iran University of Medical Sciences, Tehran, Iran
| | - Goh Yong Meng
- Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Malaysia
| | - Massoud Houshmand
- Medical Genetics Department, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
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The progression from a lower to a higher invasive stage of bladder cancer is associated with severe alterations in glucose and pyruvate metabolism. Exp Cell Res 2015; 335:91-8. [DOI: 10.1016/j.yexcr.2015.04.007] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 04/08/2015] [Accepted: 04/12/2015] [Indexed: 11/23/2022]
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21
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Sanguedolce F, Cormio A, Bufo P, Carrieri G, Cormio L. Molecular markers in bladder cancer: Novel research frontiers. Crit Rev Clin Lab Sci 2015; 52:242-55. [PMID: 26053693 DOI: 10.3109/10408363.2015.1033610] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Bladder cancer (BC) is a heterogeneous disease encompassing distinct biologic features that lead to extremely different clinical behaviors. In the last 20 years, great efforts have been made to predict disease outcome and response to treatment by developing risk assessment calculators based on multiple standard clinical-pathological factors, as well as by testing several molecular markers. Unfortunately, risk assessment calculators alone fail to accurately assess a single patient's prognosis and response to different treatment options. Several molecular markers easily assessable by routine immunohistochemical techniques hold promise for becoming widely available and cost-effective tools for a more reliable risk assessment, but none have yet entered routine clinical practice. Current research is therefore moving towards (i) identifying novel molecular markers; (ii) testing old and new markers in homogeneous patients' populations receiving homogeneous treatments; (iii) generating a multimarker panel that could be easily, and thus routinely, used in clinical practice; (iv) developing novel risk assessment tools, possibly combining standard clinical-pathological factors with molecular markers. This review analyses the emerging body of literature concerning novel biomarkers, ranging from genetic changes to altered expression of a huge variety of molecules, potentially involved in BC outcome and response to treatment. Findings suggest that some of these indicators, such as serum circulating tumor cells and tissue mitochondrial DNA, seem to be easily assessable and provide reliable information. Other markers, such as the phosphoinositide-3-kinase (PI3K)/AKT (serine-threonine kinase)/mTOR (mammalian target of rapamycin) pathway and epigenetic changes in DNA methylation seem to not only have prognostic/predictive value but also, most importantly, represent valuable therapeutic targets. Finally, there is increasing evidence that the development of novel risk assessment tools combining standard clinical-pathological factors with molecular markers represents a major quest in managing this poorly predictable disease.
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Jamali L, Banoei MM, Khalili E, Dadgar S, Houshmand M. Association of genetic variations in the mitochondrial D-loop with β-thalassemia. Mitochondrial DNA A DNA Mapp Seq Anal 2014; 27:1693-6. [PMID: 25230702 DOI: 10.3109/19401736.2014.958730] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Beta-thalassemia, one of the most common single-gene disorders, is the result of reduced or absent production of β-globin chains. Patients with β-thalassemia show weak genotype-phenotype correlations. Mitochondrial DNA polymorphisms are a potential source for different physiological and pathological characteristics and have been found to be associated as genetic modifiers with various pathophysiologies, including cancers and neurodegenerative diseases. A group of 35 patients with β-thalassemia was investigated for the presence of mtDNA D-loop polymorphisms in comparison with 504 normal controls. We found four mtDNA D-loop polymorphisms at nucleotides 16,069C > T, 16,189T > C, 16,319G > A, and 16,519T > C that showed significant differences between patients and normal subjects. There is no strong proof for the association of these polymorphisms with β-thalassemia. It is hypothesized that iron overload or its effects on sequestration of calcium or zinc can lead to oxidative stress and ROS production inside the mitochondria. Therefore, possible accompanying of mtDNA polymorphisms with β-thalassemia disease may complicate the genotype-phenotype correlation and could affect the clinical outcomes in the patients.
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Affiliation(s)
- Leila Jamali
- a Department of Medical Genetics , Special Medical Center , Tehran , Islamic Republic of Iran
| | - Mohammad Mehdi Banoei
- b S nyder Institute for Chronic Disorders, University of Calgary , Calgary , Alberta , Canada , and
| | - Elham Khalili
- a Department of Medical Genetics , Special Medical Center , Tehran , Islamic Republic of Iran
| | - Sepideh Dadgar
- a Department of Medical Genetics , Special Medical Center , Tehran , Islamic Republic of Iran
| | - Massoud Houshmand
- a Department of Medical Genetics , Special Medical Center , Tehran , Islamic Republic of Iran .,c Department of Medical Genetics , National Institute of Genetic Engineering and Biotechnology , Tehran , Islamic Republic of Iran
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