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Berner MJ, Wall SW, Echeverria GV. Deregulation of mitochondrial gene expression in cancer: mechanisms and therapeutic opportunities. Br J Cancer 2024:10.1038/s41416-024-02817-1. [PMID: 39143326 DOI: 10.1038/s41416-024-02817-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 07/30/2024] [Accepted: 08/01/2024] [Indexed: 08/16/2024] Open
Abstract
"Reprogramming of energy metabolism" was first considered an emerging hallmark of cancer in 2011 by Hanahan & Weinberg and is now considered a core hallmark of cancer. Mitochondria are the hubs of metabolism, crucial for energetic functions and cellular homeostasis. The mitochondrion's bacterial origin and preservation of their own genome, which encodes proteins and RNAs essential to their function, make them unique organelles. Successful generation of mitochondrial gene products requires coordinated functioning of the mitochondrial 'central dogma,' encompassing all steps necessary for mtDNA to yield mitochondrial proteins. Each of these processes has several levels of regulation, including mtDNA accessibility and protection through mtDNA packaging and epigenetic modifications, mtDNA copy number through mitochondrial replication, mitochondrial transcription through mitochondrial transcription factors, and mitochondrial translation through mitoribosome formation. Deregulation of these mitochondrial processes in the context of cancers has only recently been appreciated, with most studies being correlative in nature. Nonetheless, numerous significant associations of the mitochondrial central dogma with pro-tumor phenotypes have been documented. Several studies have even provided mechanistic insights and further demonstrated successful pharmacologic targeting strategies. Based on the emergent importance of mitochondria for cancer biology and therapeutics, it is becoming increasingly important that we gain an understanding of the underpinning mechanisms so they can be successfully therapeutically targeted. It is expected that this mechanistic understanding will result in mitochondria-targeting approaches that balance anticancer potency with normal cell toxicity. This review will focus on current evidence for the dysregulation of mitochondrial gene expression in cancers, as well as therapeutic opportunities on the horizon.
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Affiliation(s)
- Mariah J Berner
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA
- Dan L Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Radiation Oncology, Baylor College of Medicine, Houston, TX, USA
| | - Steven W Wall
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA
- Dan L Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Radiation Oncology, Baylor College of Medicine, Houston, TX, USA
| | - Gloria V Echeverria
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA.
- Dan L Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA.
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA.
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA.
- Department of Radiation Oncology, Baylor College of Medicine, Houston, TX, USA.
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2
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Czarny P, Ziółkowska S, Kołodziej Ł, Watała C, Wigner-Jeziorska P, Bliźniewska-Kowalska K, Wachowska K, Gałecka M, Synowiec E, Gałecki P, Bijak M, Szemraj J, Śliwiński T. Single-Nucleotide Polymorphisms in Genes Maintaining the Stability of Mitochondrial DNA Affect the Occurrence, Onset, Severity and Treatment of Major Depressive Disorder. Int J Mol Sci 2023; 24:14752. [PMID: 37834200 PMCID: PMC10573273 DOI: 10.3390/ijms241914752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023] Open
Abstract
One of the key features of major depressive disorder (MDD, depression) is increased oxidative stress manifested by elevated levels of mtROS, a hallmark of mitochondrial dysfunction, which can arise from mitochondrial DNA (mtDNA) damage. Thus, the current study explores possibility that the single-nucleotide polymorphisms (SNPs) of genes encoding the three enzymes that are thought to be implicated in the replication, repair or degradation of mtDNA, i.e., POLG, ENDOG and EXOG, have an impact on the occurrence, onset, severity and treatment of MDD. Five SNPs were selected: EXOG c.-188T > G (rs9838614), EXOG c.*627G > A (rs1065800), POLG c.-1370T > A (rs1054875), ENDOG c.-394T > C (rs2977998) and ENDOG c.-220C > T (rs2997922), while genotyping was performed on 538 DNA samples (277 cases and 261 controls) using TaqMan probes. All SNPs of EXOG and ENDOG modulated the risk of depression, but the strongest effect was observed for rs1065800, while rs9838614 and rs2977998 indicate that they might influence the severity of symptoms, and, to a lesser extent, treatment effectiveness. Although the SNP located in POLG did not affect occurrence of the disease, the result suggests that it may influence the onset and treatment outcome. These findings further support the hypothesis that mtDNA damage and impairment in its metabolism play a crucial role not only in the development, but also in the treatment of depression.
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Affiliation(s)
- Piotr Czarny
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (S.Z.); (J.S.)
| | - Sylwia Ziółkowska
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (S.Z.); (J.S.)
| | - Łukasz Kołodziej
- Laboratory of Medical Genetics, Faculty of Biology and Environmental Protection, University of Lodz, 92-215 Lodz, Poland; (Ł.K.)
| | - Cezary Watała
- Department of Haemostatic Disorders, Medical University of Lodz, 92-215 Lodz, Poland;
| | - Paulina Wigner-Jeziorska
- Department of General Biochemistry, Faculty of Biology and Environmental Protection, University of Lodz, 90-136 Lodz, Poland;
| | | | - Katarzyna Wachowska
- Department of Adult Psychiatry, Medical University of Lodz, 91-229 Lodz, Poland; (K.B.-K.); (K.W.); (P.G.)
| | - Małgorzata Gałecka
- Department of Psychotherapy, Medical University of Lodz, 91-229 Lodz, Poland;
| | - Ewelina Synowiec
- Laboratory of Medical Genetics, Faculty of Biology and Environmental Protection, University of Lodz, 92-215 Lodz, Poland; (Ł.K.)
| | - Piotr Gałecki
- Department of Adult Psychiatry, Medical University of Lodz, 91-229 Lodz, Poland; (K.B.-K.); (K.W.); (P.G.)
| | - Michał Bijak
- Biohazard Prevention Centre, Faculty of Biology and Environmental Protection, University of Lodz, 90-136 Lodz, Poland;
| | - Janusz Szemraj
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (S.Z.); (J.S.)
| | - Tomasz Śliwiński
- Laboratory of Medical Genetics, Faculty of Biology and Environmental Protection, University of Lodz, 92-215 Lodz, Poland; (Ł.K.)
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3
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Xu Y, Yang Y, Wang Y, Su J, Chan T, Zhou J, Gong Y, Wang K, Gu Y, Zhang C, Wu G, Bi L, Qin X, Han J. Molecular fingerprints of nuclear genome and mitochondrial genome for early diagnosis of lung adenocarcinoma. J Transl Med 2023; 21:250. [PMID: 37038181 PMCID: PMC10084603 DOI: 10.1186/s12967-023-04099-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 03/30/2023] [Indexed: 04/12/2023] Open
Abstract
BACKGROUND Lung adenocarcinoma (LUAD) is the most prevalent subtype of lung cancer with high morbidity and mortality rates. Due to the heterogeneity of LUAD, its characteristics remain poorly understood. Exploring the clinical and molecular characteristics of LUAD is challenging but vital for early diagnosis. METHODS This observational and validation study enrolled 80 patients and 13 healthy controls. Nuclear and mtDNA-captured sequencings were performed. RESULTS This study identified a spectrum of nuclear and mitochondrial genome mutations in early-stage lung adenocarcinoma and explored their association with diagnosis. The correlation coefficient for somatic mutations in cfDNA and patient-matched tumor tissues was high in nuclear and mitochondrial genomes. The mutation number of highly mutated genes was evaluated, and the Least Absolute Shrinkage and Selection Operator (LASSO) established a diagnostic model. Receiver operating characteristic (ROC) curve analysis explored the diagnostic ability of the two panels. All models were verified in the testing cohort, and the mtDNA panel demonstrated excellent performance. This study identified somatic mutations in the nuclear and mitochondrial genomes, and detecting mutations in cfDNA displayed good diagnostic performance for early-stage LUAD. Moreover, detecting somatic mutations in the mitochondria may be a better tool for diagnosing early-stage LUAD. CONCLUSIONS This study identified specific and sensitive diagnostic biomarkers for early-stage LUAD by focusing on nuclear and mitochondrial genome mutations. This also further developed an early-stage LUAD-specific mutation gene panel for clinical utility. This study established a foundation for further investigation of LUAD molecular pathogenesis.
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Affiliation(s)
- Yichun Xu
- National Engineering Research Center for Biochip at Shanghai and Shanghai Biochip Limited Corporation, No.151, Libing Road, Shanghai, 201203, China.
- Department of Pathology, Shanghai Tongji Hospital, Tongji Hospital Affiliated to Tongji University, Shanghai, China.
| | - Yong Yang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, No.241, Huaihai West Road, Shanghai, China
| | - Yichao Wang
- Department of Oncology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, China
| | - Jun Su
- National Engineering Research Center for Biochip at Shanghai and Shanghai Biochip Limited Corporation, No.151, Libing Road, Shanghai, 201203, China
- Department of Pathology, Shanghai Tongji Hospital, Tongji Hospital Affiliated to Tongji University, Shanghai, China
| | - Tianlong Chan
- National Engineering Research Center for Biochip at Shanghai and Shanghai Biochip Limited Corporation, No.151, Libing Road, Shanghai, 201203, China
| | - Jiajing Zhou
- National Engineering Research Center for Biochip at Shanghai and Shanghai Biochip Limited Corporation, No.151, Libing Road, Shanghai, 201203, China
| | - Yi Gong
- National Engineering Research Center for Biochip at Shanghai and Shanghai Biochip Limited Corporation, No.151, Libing Road, Shanghai, 201203, China
- Department of Pathology, Shanghai Tongji Hospital, Tongji Hospital Affiliated to Tongji University, Shanghai, China
| | - Ke Wang
- Acupuncture Anesthesia Clinical Research Institute, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yifeng Gu
- Department of Oncology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, China
| | - Congmeng Zhang
- Department of Oncology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, China
| | - Guanjin Wu
- Department of Oncology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, China
| | - Ling Bi
- Department of Oncology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Ganhe Road, Shanghai, China
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiong Qin
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, No.241, Huaihai West Road, Shanghai, China.
| | - Junsong Han
- National Engineering Research Center for Biochip at Shanghai and Shanghai Biochip Limited Corporation, No.151, Libing Road, Shanghai, 201203, China.
- Department of Pathology, Shanghai Tongji Hospital, Tongji Hospital Affiliated to Tongji University, Shanghai, China.
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Darvin P, Sasidharan Nair V. Editorial: Understanding mitochondrial dynamics and metabolic plasticity in cancer stem cells: Recent advances in cancer treatment and potential therapeutic approaches. Front Oncol 2023; 13:1155774. [PMID: 36998468 PMCID: PMC10043494 DOI: 10.3389/fonc.2023.1155774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 03/07/2023] [Indexed: 03/15/2023] Open
Affiliation(s)
- Pramod Darvin
- Cancer Research Division, Rajiv Gandhi Centre for Biotechnology, Trivandrum, India
- *Correspondence: Pramod Darvin, ; Varun Sasidharan Nair,
| | - Varun Sasidharan Nair
- Department Experimental Immunology, Helmholtz Centre for Infection Research, Braunschweig, Germany
- *Correspondence: Pramod Darvin, ; Varun Sasidharan Nair,
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5
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Role of Mitophagy in Regulating Intestinal Oxidative Damage. Antioxidants (Basel) 2023; 12:antiox12020480. [PMID: 36830038 PMCID: PMC9952109 DOI: 10.3390/antiox12020480] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
The mitochondrion is also a major site for maintaining redox homeostasis between reactive oxygen species (ROS) generation and scavenging. The quantity, quality, and functional integrity of mitochondria are crucial for regulating intracellular homeostasis and maintaining the normal physiological function of cells. The role of oxidative stress in human disease is well established, particularly in inflammatory bowel disease and gastrointestinal mucosal diseases. Oxidative stress could result from an imbalance between ROS and the antioxidative system. Mitochondria are both the main sites of production and the main target of ROS. It is a vicious cycle in which initial ROS-induced mitochondrial damage enhanced ROS production that, in turn, leads to further mitochondrial damage and eventually massive intestinal cell death. Oxidative damage can be significantly mitigated by mitophagy, which clears damaged mitochondria. In this review, we aimed to review the molecular mechanisms involved in the regulation of mitophagy and oxidative stress and their relationship in some intestinal diseases. We believe the reviews can provide new ideas and a scientific basis for researching antioxidants and preventing diseases related to oxidative damage.
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Imamura M. Hypothesis: can transfer of primary neoplasm-derived extracellular vesicles and mitochondria contribute to the development of donor cell-derived hematologic neoplasms after allogeneic hematopoietic cell transplantation? Cytotherapy 2022; 24:1169-1180. [PMID: 36058790 DOI: 10.1016/j.jcyt.2022.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 07/06/2022] [Accepted: 07/13/2022] [Indexed: 01/31/2023]
Abstract
Allogeneic hematopoietic cell transplantation (allo-HCT) is an essential treatment option for various neoplastic and non-neoplastic hematologic diseases. Although its efficacy is modest, a significant proportion of patients experience relapse, graft-versus-host disease, infection or impaired hematopoiesis. Among these, the most frequent cause of post-transplant mortality is relapse, whereas the development of de novo hematologic neoplasms from donor cells after allo-HCT occurs on some occasion as a rare complication. The mechanisms involved in the pathogenesis of the de novo hematologic neoplasms from donor cells are complex, and a multifactorial process contributes to the development of this complication. Recently, extracellular vesicles, particularly exosomes, and mitochondria have been shown to play crucial roles in intercellular communication through the transfer of specific constituents, such as deoxyribonucleic acids, ribonucleic acids, lipids, metabolites and cytosolic and cell-surface proteins. Here, I discuss the potential causative roles of these subcellular components in the development of de novo hematologic neoplasms from donor cells after allo-HCT, in addition to other etiologies.
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Affiliation(s)
- Masahiro Imamura
- Department of Hematology, Sapporo Hokuyu Hospital, Sapporo, Japan.
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7
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Memon AA, Vats S, Sundquist J, Li Y, Sundquist K. Mitochondrial DNA Copy Number: Linking Diabetes and Cancer. Antioxid Redox Signal 2022; 37:1168-1190. [PMID: 36169625 DOI: 10.1089/ars.2022.0100] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent Advances: Various studies have suggested that mitochondrial DNA copy number (mtDNA-CN), a surrogate biomarker of mitochondrial dysfunction, is an easily quantifiable biomarker for chronic diseases, including diabetes and cancer. However, current knowledge is limited, and the results are controversial. This has been attributed mainly to methodology and study design. Critical Issues: The incidence of diabetes and cancer has increased significantly in recent years. Moreover, type 2 diabetes (T2D) has been shown to be a risk factor for cancer. mtDNA-CN has been associated with both T2D and cancer. However, it is not known whether mtDNA-CN plays any role in the association between T2D and cancer. Significance: In this review, we have discussed mtDNA-CN in diabetes and cancer, and reviewed the literature and methodology used in published studies so far. Based on the literature review, we have speculated how mtDNA-CN may act as a link between diabetes and cancer. Furthermore, we have provided some recommendations for reliable translation of mtDNA-CN as a biomarker. Future Directions: Further research is required to elucidate the role of mtDNA-CN in the association between T2D and cancer. If established, early lifestyle interventions, such as physical activity and diet control that improve mitochondrial function, may help preventing cancer in patients with T2D. Antioxid. Redox Signal. 37, 1168-1190.
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Affiliation(s)
- Ashfaque A Memon
- Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden
| | - Sakshi Vats
- Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden
| | - Jan Sundquist
- Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden
| | - Yanni Li
- Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden
| | - Kristina Sundquist
- Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden
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8
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Almeida J, Pérez-Figueroa A, Alves JM, Valecha M, Prado-López S, Alvariño P, Cameselle-Teijeiro JM, Chantada D, Fonseca MM, Posada D. Single-cell mtDNA heteroplasmy in colorectal cancer. Genomics 2022; 114:110315. [PMID: 35181467 DOI: 10.1016/j.ygeno.2022.110315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/31/2022] [Accepted: 02/14/2022] [Indexed: 11/19/2022]
Abstract
Human mitochondria can be genetically distinct within the same individual, a phenomenon known as heteroplasmy. In cancer, this phenomenon seems exacerbated, and most mitochondrial mutations seem to be heteroplasmic. How this genetic variation is arranged within and among normal and tumor cells is not well understood. To address this question, here we sequenced single-cell mitochondrial genomes from multiple normal and tumoral locations in four colorectal cancer patients. Our results suggest that single cells, both normal and tumoral, can carry various mitochondrial haplotypes. Remarkably, this intra-cell heteroplasmy can arise before tumor development and be maintained afterward in specific tumoral cell subpopulations. At least in the colorectal patients studied here, the somatic mutations in the single-cells do not seem to have a prominent role in tumorigenesis.
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Affiliation(s)
- João Almeida
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Portugal
| | - Andrés Pérez-Figueroa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Portugal; CINBIO, Universidade de Vigo, 36310 Vigo, Spain; Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Spain
| | - João M Alves
- CINBIO, Universidade de Vigo, 36310 Vigo, Spain; Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Spain
| | - Monica Valecha
- CINBIO, Universidade de Vigo, 36310 Vigo, Spain; Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Spain
| | - Sonia Prado-López
- CINBIO, Universidade de Vigo, 36310 Vigo, Spain; Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Spain
| | - Pilar Alvariño
- CINBIO, Universidade de Vigo, 36310 Vigo, Spain; Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Spain
| | - José Manuel Cameselle-Teijeiro
- Department of Pathology, Clinical University Hospital, Galician Healthcare Service (SERGAS), Santiago de Compostela, Spain; Medical Faculty, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Débora Chantada
- Department of Pathology, Hospital Álvaro Cunqueiro, Vigo, Spain
| | - Miguel M Fonseca
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Portugal
| | - David Posada
- CINBIO, Universidade de Vigo, 36310 Vigo, Spain; Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Spain; Department of Biochemistry, Genetics, and Immunology, Universidade de Vigo, 36310 Vigo, Spain.
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9
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Trecarichi A, Duggett NA, Granat L, Lo S, Malik AN, Zuliani-Álvarez L, Flatters SJL. Preclinical evidence for mitochondrial DNA as a potential blood biomarker for chemotherapy-induced peripheral neuropathy. PLoS One 2022; 17:e0262544. [PMID: 35015774 PMCID: PMC8752024 DOI: 10.1371/journal.pone.0262544] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 12/28/2021] [Indexed: 01/14/2023] Open
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a serious dose-limiting side effect of several first-line chemotherapeutic agents including paclitaxel, oxaliplatin and bortezomib, for which no predictive marker is currently available. We have previously shown that mitochondrial dysfunction is associated with the development and maintenance of CIPN. The aim of this study was to evaluate the potential use of mitochondrial DNA (mtDNA) levels and complex I enzyme activity as blood biomarkers for CIPN. Real-time qPCR was used to measure mtDNA levels in whole blood collected from chemotherapy- and vehicle-treated rats at three key time-points of pain-like behaviour: prior to pain development, at the peak of mechanical hypersensitivity and at resolution of pain-like behaviour. Systemic oxaliplatin significantly increased mtDNA levels in whole blood prior to pain development. Furthermore, paclitaxel- and bortezomib-treated animals displayed significantly higher levels of mtDNA at the peak of mechanical hypersensitivity. Mitochondrial complex I activity in whole blood was assessed with an ELISA-based Complex I Enzyme Activity Dipstick Assay. Complex I activity was not altered by any of the three chemotherapeutic agents, either prior to or during pain-like behaviour. These data demonstrate that blood levels of mtDNA are altered after systemic administration of chemotherapy. Oxaliplatin, in particular, is associated with higher mtDNA levels before animals show any pain-like behaviour, thus suggesting a potential role for circulating mtDNA levels as non-invasive predictive biomarker for CIPN.
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Affiliation(s)
- Annalisa Trecarichi
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
| | - Natalie A. Duggett
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
| | - Lucy Granat
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
| | - Samantha Lo
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
| | - Afshan N. Malik
- Department of Diabetes, School of Life Course Sciences, King’s College London, London, United Kingdom
| | - Lorena Zuliani-Álvarez
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
| | - Sarah J. L. Flatters
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
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10
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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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11
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Giaccherini M, Gentiluomo M, Fornili M, Lucenteforte E, Baglietto L, Campa D. Association between telomere length and mitochondrial copy number and cancer risk in humans: A meta-analysis on more than 300,000 individuals. Crit Rev Oncol Hematol 2021; 167:103510. [PMID: 34695574 DOI: 10.1016/j.critrevonc.2021.103510] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 10/13/2021] [Accepted: 10/14/2021] [Indexed: 12/17/2022] Open
Abstract
In the last decades the association of leukocyte telomere length (LTL) and mitochondrial copy number (mtDNAcn) with cancer risk has been the focus of many reports, however the relation is not yet completely understood. A meta-analysis of 112 studies including 64,184 cancer cases and 278,641 controls that analysed LTL and mtDNAcn in relation to cancer risk has been conducted to further our understanding of the topic. Stratified analyses for tumor type were also performed. Overall, no association was observed for all cancer combined neither for LTL nor mtDNAcn. Significant associations were detected for these biomarkers and specific cancer type; however, a large degree of heterogeneity was present, even within the same tumor type. Alternatives approaches based on polymorphic variants, such as polygenic risk scores and mendelian randomization, could be adopted to unravel the causal correlation of telomere length and mitochondrial copy number with cancer risk.
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Affiliation(s)
| | | | - Marco Fornili
- Department of Clinical and Experimental Medicine, University of Pisa, 56126, Pisa, Italy.
| | - Ersilia Lucenteforte
- Department of Clinical and Experimental Medicine, University of Pisa, 56126, Pisa, Italy.
| | - Laura Baglietto
- Department of Clinical and Experimental Medicine, University of Pisa, 56126, Pisa, Italy.
| | - Daniele Campa
- Department of Biology, University of Pisa, 56126, Pisa, Italy.
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12
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Association of Mitochondrial DNA Copy Number and Telomere Length with Prevalent and Incident Cancer and Cancer Mortality in Women: A Prospective Swedish Population-Based Study. Cancers (Basel) 2021; 13:cancers13153842. [PMID: 34359743 PMCID: PMC8345403 DOI: 10.3390/cancers13153842] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 12/09/2022] Open
Abstract
Changes in mitochondrial DNA copy number (mtDNA-CN) and telomere length have, separately, been proposed as risk factors for various cancer types. However, those results are conflicting. Here, mtDNA-CN and relative telomere length were measured in 3225 middle-aged women included in a large population-based prospective cohort. The baseline mtDNA-CN in patients with prevalent breast cancer was significantly higher (12.39 copies/µL) than cancer-free individuals. During an average of 15.2 years of follow-up, 520 patients were diagnosed with cancer. Lower mtDNA-CN was associated with decreased risk of genital organ cancer (hazard ratio (HR), 0.84), and shorter telomere length was associated with increased risk of urinary system cancer (HR, 1.79). Furthermore, mtDNA-CN was inversely associated with all-cause (HR, 1.20) and cancer-specific mortality (HR, 1.21) when considering all cancer types. Surprisingly, shorter telomere length was associated with decreased risk of cancer-specific mortality when considering all cancer types (HR, 0.85). Finally, lower mtDNA-CN and shorter telomere length were associated with increased risk of both all-cause and cancer-specific mortality in genital organ cancer patients. In this study population, we found that mtDNA-CN and telomere length were significantly associated with prevalent and incident cancer and cancer mortality. However, these associations were cancer type specific and need further investigation.
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13
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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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14
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Deciphering the genetic and epidemiological landscape of mitochondrial DNA abundance. Hum Genet 2020; 140:849-861. [PMID: 33385171 PMCID: PMC8099832 DOI: 10.1007/s00439-020-02249-w] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 12/15/2020] [Indexed: 12/13/2022]
Abstract
Mitochondrial (MT) dysfunction is a hallmark of aging and has been associated with most aging-related diseases as well as immunological processes. However, little is known about aging, lifestyle and genetic factors influencing mitochondrial DNA (mtDNA) abundance. In this study, mtDNA abundance was estimated from the weighted intensities of probes mapping to the MT genome in 295,150 participants from the UK Biobank. We found that the abundance of mtDNA was significantly elevated in women compared to men, was negatively correlated with advanced age, higher smoking exposure, greater body-mass index, higher frailty index as well as elevated red and white blood cell count and lower mortality. In addition, several biochemistry markers in blood-related to cholesterol metabolism, ion homeostasis and kidney function were found to be significantly associated with mtDNA abundance. By performing a genome-wide association study, we identified 50 independent regions genome-wide significantly associated with mtDNA abundance which harbour multiple genes involved in the immune system, cancer as well as mitochondrial function. Using mixed effects models, we estimated the SNP-heritability of mtDNA abundance to be around 8%. To investigate the consequence of altered mtDNA abundance, we performed a phenome-wide association study and found that mtDNA abundance is involved in risk for leukaemia, hematologic diseases as well as hypertension. Thus, estimating mtDNA abundance from genotyping arrays has the potential to provide novel insights into age- and disease-relevant processes, particularly those related to immunity and established mitochondrial functions.
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15
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Cocco MP, White E, Xiao S, Hu D, Mak A, Sleiman P, Yang M, Bobbitt KR, Gui H, Levin AM, Hochstadt S, Whitehouse K, Rynkowski D, Barczak AJ, Abecasis G, Blackwell TW, Kang HM, Nickerson DA, Germer S, Ding J, Lanfear DE, Gilliland F, Gauderman WJ, Kumar R, Erle DJ, Martinez F, Hakonarson H, Burchard EG, Williams LK. Asthma and its relationship to mitochondrial copy number: Results from the Asthma Translational Genomics Collaborative (ATGC) of the Trans-Omics for Precision Medicine (TOPMed) program. PLoS One 2020; 15:e0242364. [PMID: 33237978 PMCID: PMC7688161 DOI: 10.1371/journal.pone.0242364] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 10/30/2020] [Indexed: 02/07/2023] Open
Abstract
Background Mitochondria support critical cellular functions, such as energy production through oxidative phosphorylation, regulation of reactive oxygen species, apoptosis, and calcium homeostasis. Objective Given the heightened level of cellular activity in patients with asthma, we sought to determine whether mitochondrial DNA (mtDNA) copy number measured in peripheral blood differed between individuals with and without asthma. Methods Whole genome sequence data was generated as part of the Trans-Omics for Precision Medicine (TOPMed) Program on participants from the Study of Asthma Phenotypes and Pharmacogenomic Interactions by Race-ethnicity (SAPPHIRE) and the Study of African Americans, Asthma, Genes, & Environment II (SAGE II). We restricted our analysis to individuals who self-identified as African American (3,651 asthma cases and 1,344 controls). Mitochondrial copy number was estimated using the sequencing read depth ratio for the mitochondrial and nuclear genomes. Respiratory complex expression was assessed using RNA-sequencing. Results Average mitochondrial copy number was significantly higher among individuals with asthma when compared with controls (SAPPHIRE: 218.60 vs. 200.47, P<0.001; SAGE II: 235.99 vs. 223.07, P<0.001). Asthma status was significantly associated with mitochondrial copy number after accounting for potential explanatory variables, such as participant age, sex, leukocyte counts, and mitochondrial haplogroup. Despite the consistent relationship between asthma status and mitochondrial copy number, the latter was not associated with time-to-exacerbation or patient-reported asthma control. Mitochondrial respiratory complex gene expression was disproportionately lower in individuals with asthma when compared with individuals without asthma and other protein-encoding genes. Conclusions We observed a robust association between asthma and higher mitochondrial copy number. Asthma having an effect on mitochondria function was also supported by lower respiratory complex gene expression in this group.
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Affiliation(s)
- Maxwell P. Cocco
- Center for Individualized and Genomic Medicine Research (CIGMA), Department of Internal Medicine, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Evan White
- Center for Individualized and Genomic Medicine Research (CIGMA), Department of Internal Medicine, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Shujie Xiao
- Center for Individualized and Genomic Medicine Research (CIGMA), Department of Internal Medicine, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Donglei Hu
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
| | - Angel Mak
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
| | - Patrick Sleiman
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Mao Yang
- Center for Individualized and Genomic Medicine Research (CIGMA), Department of Internal Medicine, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Kevin R. Bobbitt
- Department of Public Health Sciences, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Hongsheng Gui
- Center for Individualized and Genomic Medicine Research (CIGMA), Department of Internal Medicine, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Albert M. Levin
- Department of Public Health Sciences, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Samantha Hochstadt
- Center for Individualized and Genomic Medicine Research (CIGMA), Department of Internal Medicine, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Kyle Whitehouse
- Center for Individualized and Genomic Medicine Research (CIGMA), Department of Internal Medicine, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Dean Rynkowski
- Center for Individualized and Genomic Medicine Research (CIGMA), Department of Internal Medicine, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Andrea J. Barczak
- Lung Biology Center and UCSF CoLabs, University of California San Francisco, San Francisco, California, United States of America
| | - Gonçalo Abecasis
- Center for Statistical Genetics, University of Michigan, Ann Arbor, Michigan, United States of America
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York, United States of America
| | - Thomas W. Blackwell
- Center for Statistical Genetics, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Hyun Min Kang
- Center for Statistical Genetics, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Deborah A. Nickerson
- Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America
- Northwest Genomics Center, Seattle, Washington, United States of America
- Brotman Baty Institute, Seattle, Washington, United States of America
| | - Soren Germer
- New York Genome Center, New York, New York, United States of America
| | - Jun Ding
- Human Statistical Genetics Unit, Laboratory of Genetics and Genomics, National Institute on Aging, National Institutes of Health, Bethesda, Maryland, United States of America
| | - David E. Lanfear
- Center for Individualized and Genomic Medicine Research (CIGMA), Department of Internal Medicine, Henry Ford Health System, Detroit, Michigan, United States of America
| | - Frank Gilliland
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - W. James Gauderman
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Rajesh Kumar
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - David J. Erle
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
- Lung Biology Center and UCSF CoLabs, University of California San Francisco, San Francisco, California, United States of America
| | - Fernando Martinez
- Arizona Respiratory Center and Department of Pediatrics, University of Arizona, Tucson, Arizona, United States of America
| | - Hakon Hakonarson
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Esteban G. Burchard
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
- Department of Bioengineering & Therapeutic Sciences, University of California San Francisco, San Francisco, California, United States of America
| | - L. Keoki Williams
- Center for Individualized and Genomic Medicine Research (CIGMA), Department of Internal Medicine, Henry Ford Health System, Detroit, Michigan, United States of America
- * E-mail:
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16
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Chang CW, Xu X, Li M, Xin D, Ding L, Wang YT, Liu Y. Pathogenic mutations reveal a role of RECQ4 in mitochondrial RNA:DNA hybrid formation and resolution. Sci Rep 2020; 10:17033. [PMID: 33046774 PMCID: PMC7552406 DOI: 10.1038/s41598-020-74095-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 09/21/2020] [Indexed: 11/09/2022] Open
Abstract
The synthesis of mitochondrial DNA (mtDNA) is a complex process that involves the formation and resolution of unusual nucleic acid structures, such as RNA:DNA hybrids. However, little is known about the enzymes that regulate these processes. RECQ4 is a DNA replication factor important for mtDNA maintenance, and here, we unveil a role of human RECQ4 in regulating the formation and resolution of mitochondrial RNA:DNA hybrids. Mitochondrial membrane protein p32 can block mtDNA synthesis by restricting RECQ4 mitochondrial localization via protein–protein interaction. We found that the interaction with p32 was disrupted not only by the previously reported cancer-associated RECQ4 mutation, del(A420-A463), but also by a clinical mutation of the adjacent residue, P466L. Surprisingly, although P466L mutant was present in the mitochondria at greater levels, unlike del(A420-A463) mutant, it failed to enhance mtDNA synthesis due to the accumulation of RNA:DNA hybrids throughout the mtDNA. Biochemical analysis revealed that P466L mutation enhanced RECQ4 annealing activity to generate RNA:DNA hybrids at the same time reduced its unwinding activity to resolve this structure. Hence, P466L mutation led to a reduced efficiency in completing mtDNA synthesis due to unresolved RNA:DNA hybrids across mtDNA.
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Affiliation(s)
- Chou-Wei Chang
- Department of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, 91010-3000, USA
| | - Xiaohua Xu
- Department of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, 91010-3000, USA
| | - Min Li
- Department of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, 91010-3000, USA
| | - Di Xin
- Department of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, 91010-3000, USA
| | - Lin Ding
- J. Craig Venter Institute, San Diego, CA, 92037, USA
| | - Ya-Ting Wang
- Memorial Sloan Kettering, New York, NY, 10065, USA
| | - Yilun Liu
- Department of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, 91010-3000, USA.
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17
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Ebrahimi E, Akhavan MH, Akrami R, Mahmoodi M, Hesami S, Hashemi M, Razavi SM, Hadji M, Zendehdel K. Association between mitochondrial DNA content and opium exposure. J Biochem Mol Toxicol 2020; 34:e22559. [PMID: 33034947 DOI: 10.1002/jbt.22559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 04/10/2020] [Accepted: 05/29/2020] [Indexed: 01/09/2023]
Abstract
To date, not much study has been done to investigate the mitochondrial DNA (mtDNA) copy number as the potential biomarker for opium exposure. Here, we conducted a cross-sectional study to determine the relative mtDNA content as the potential biomarker for opium exposure. Quantitative real-time PCR was performed to investigate the mtDNA copy number variation across 205 individuals, including blood samples of 45 opium users, 41 cigarette users, 47 dual users, and 72 never users of any product. We found a significantly higher mtDNA content among the opium-only users (adjusted OR: 3.21; 95% CI: [1.34, 7.66]; P = .009) and dual users (adjusted OR: 2.64; 95% CI: [1.15, 6.1]; P = .02) compared to that in never users even after adjustment for confounding factors, age, and sex. Discordantly, analysis of mitochondrial DNA in cigarette smokers revealed an indirect association between cigarette smoking and mtDNA content although it was not statistically significant. The reason behind the increased mitochondrial DNA is unclear. The possible hypothesis is that there might be a way to compensate for the oxidative damage induced by opium consumption. Taken together, our findings indicated that the mtDNA copy number may alter during opium exposure. Since changes in the mitochondrial DNA copy number was associated with the etiology of many diseases including cancer, further investigations on the mtDNA copy number may shed light on the carcinogenicity of opium consumption and means for early detection among the populations who have been exposed to opium and its products.
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Affiliation(s)
- Elmira Ebrahimi
- Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran.,Cancer Biology Research Center, Cancer Institute, Imam Khomeini Hospital Complex, Tehran, Iran
| | - Mohammad H Akhavan
- Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran.,Department of Genetics, Faculty of Advanced Sciences and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Rahim Akrami
- Department of Epidemiology & Biostatistics, School of Public Health, Sabzevar University of Medical Sciences, Sabzevar, Iran.,Department of Epidemiology & Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Majid Mahmoodi
- Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran
| | - Sara Hesami
- Medical Genetics Department, Cancer Institute, Imam Khomeini Hospital, Tehran, Iran
| | - Mehrdad Hashemi
- Department of Genetics, Faculty of Advanced Sciences and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Seyed M Razavi
- Department of Occupational Health Engineering, School of Public Health, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Maryam Hadji
- Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran.,Health Science Unit, Faculty of Social Science, Tampere University, Tampere, Finland
| | - Kazem Zendehdel
- Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran.,Cancer Biology Research Center, Cancer Institute, Imam Khomeini Hospital Complex, Tehran, Iran
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18
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Leukocyte mitochondrial DNA copy number and built environment in Mexican Americans: a cross-sectional study. Sci Rep 2020; 10:14988. [PMID: 32917938 PMCID: PMC7486918 DOI: 10.1038/s41598-020-72083-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 08/17/2020] [Indexed: 12/15/2022] Open
Abstract
Mitochondrial DNA (mtDNA) copy number in leukocytes has been regarded as a biomarker for various environmental exposures and chronic diseases. Our previous study showed that certain demographic factors (e.g. age, gender, BMI, etc.) significantly affect levels of leukocyte mtDNA copy number in Mexican Americans. However, the effect of the built environment on leukocyte mtDNA copy number has not been studied previously. In this cross-sectional study, we examined the association between multiple components of the built environment with leukocyte mtDNA copy number among 5,502 Mexican American adults enrolled in Mano-A-Mano, the Mexican American Cohort Study (MACS). Based on the median levels of mtDNA copy number, the study population was stratified into low mtDNA copy number group (< median) and high mtDNA copy number group (≥ median). Among all built environment exposure variables, household density and road/intersection ratio were found to be statistically significant between groups with low and high mtDNA copy number (P < 0.001 and 0.002, respectively). In the multivariate logistic regression analysis, individuals living in areas with elevated levels of household density had 1.24-fold increased odds of having high levels of mtDNA copy number [Odds ratio (OR) = 1.24, 95% confidence interval (CIs) 1.08, 1.36]. Similarly, those living in areas with elevated levels of road/intersection ratio had 1.12-fold increased odds of having high levels of mtDNA copy number (OR = 1.12, 95% CI 1.01, 1.27). In further analysis, when both variables were analyzed together in a multivariate logistic regression model, the significant associations remained. In summary, our results suggest that selected built environment variables (e.g. population density and road/intersection ratio) may influence levels of mtDNA copy number in leukocytes in Mexican Americans.
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19
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Xu J, Chang WS, Tsai CW, Bau DT, Davis JW, Thompson TC, Logothetis CJ, Gu J. Mitochondrial DNA copy number in peripheral blood leukocytes is associated with biochemical recurrence in prostate cancer patients in African Americans. Carcinogenesis 2020; 41:267-273. [PMID: 31408512 DOI: 10.1093/carcin/bgz139] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 07/17/2019] [Accepted: 08/07/2019] [Indexed: 12/13/2022] Open
Abstract
Mitochondria play multiple important cellular functions. The purpose of this study was to evaluate whether leukocyte mitochondrial DNA copy number (mtDNAcn) is associated with aggressive prostate cancer (PCa) in African American (AA) men. We measured the mtDNAcn in peripheral blood leukocytes from 317 localized AA PCa patients and evaluated its associations with aggressive disease features at diagnosis and biochemical recurrence (BCR) after treatments. There was no significant difference in mtDNAcn among the clinical features at diagnosis, including age, prostate-specific antigen level, Gleason score and clinical stage under analysis of variance test. However, mtDNAcn was significantly associated with BCR in multivariate Cox analysis. Dichotomized into low and high mtDNAcn groups by the median value of mtDNAcn, patients with low mtDNAcn exhibited a significantly lower risk of BCR (hazard ratio = 0.32, 95% confidence interval: 0.13-0.79) compared to those with high mtDNAcn. There was a significant dose-response in tertile and quartile analyses (P for trend = 0.012 and 0.002, respectively). In Kaplan-Meier survival analyses, patients with higher mtDNAcn exhibited significantly shorter BCR-free survival time than those with lower mtDNAcn in dichotomous, tertile and quartile analyses, with long-rank P values of 0.017, 0.024 and 0.019, respectively. Our results showed for the first time that high leukocyte mtDNAcn was associated with worse prognosis in AA PCa patients.
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Affiliation(s)
- Junfeng Xu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Wen-Shin Chang
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Terry Fox Cancer Research Laboratory, China Medical University Hospital, Taichung, Taiwan
| | - Chia-Wen Tsai
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Terry Fox Cancer Research Laboratory, China Medical University Hospital, Taichung, Taiwan
| | - Da-Tian Bau
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Terry Fox Cancer Research Laboratory, China Medical University Hospital, Taichung, Taiwan
| | | | - Timothy C Thompson
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Christopher J Logothetis
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jian Gu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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20
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Rosa HS, Ajaz S, Gnudi L, Malik AN. A case for measuring both cellular and cell-free mitochondrial DNA as a disease biomarker in human blood. FASEB J 2020; 34:12278-12288. [PMID: 32729179 DOI: 10.1096/fj.202000959rr] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/26/2020] [Accepted: 06/30/2020] [Indexed: 12/14/2022]
Abstract
Circulating mitochondrial DNA (mtDNA), widely studied as a disease biomarker, comprises of mtDNA located within mitochondria, indicative of mitochondrial function, and cell-free (cf) mtDNA linked to inflammation. The purpose of this study was to determine the ranges of, and relationship between, cellular and cf mtDNA in human blood. Whole blood from 23 controls (HC) and 20 patients with diabetes was separated into peripheral blood mononuclear cells (PBMCs), plasma, and serum. Total DNA was isolated and mtDNA copy numbers were determined using absolute quantification. Cellular mtDNA content in PBMCs was higher than in peripheral blood and a surprisingly high level of cf mtDNA was present in serum and plasma of HC, with no direct relationship between cellular and cf mtDNA content within individuals. Diabetes patients had similar levels of cellular mtDNA compared to healthy participants but a significantly higher cf mtDNA content. Furthermore, only in patients with diabetes, we observed a correlation between whole blood and plasma mtDNA levels, indicating that the relationship between cellular and cf mtDNA content is affected by disease status. In conclusion, when evaluating mtDNA in human blood as a biomarker of mitochondrial dysfunction, it is important to measure both cellular and cf mtDNA.
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Affiliation(s)
- Hannah S Rosa
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Saima Ajaz
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Luigi Gnudi
- School of Cardiovascular Medicine & Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Afshan N Malik
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK.,School of Cardiovascular Medicine & Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
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21
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Wang SF, Chen S, Tseng LM, Lee HC. Role of the mitochondrial stress response in human cancer progression. Exp Biol Med (Maywood) 2020; 245:861-878. [PMID: 32326760 PMCID: PMC7268930 DOI: 10.1177/1535370220920558] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
IMPACT STATEMENT Dysregulated mitochondria often occurred in cancers. Mitochondrial dysfunction might contribute to cancer progression. We reviewed several mitochondrial stresses in cancers. Mitochondrial stress responses might contribute to cancer progression. Several mitochondrion-derived molecules (ROS, Ca2+, oncometabolites, exported mtDNA, mitochondrial double-stranded RNA, humanin, and MOTS-c), integrated stress response, and mitochondrial unfolded protein response act as retrograde signaling pathways and might be critical in the development and progression of cancer. Targeting these mitochondrial stress responses may be an important strategy for cancer treatment.
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Affiliation(s)
- Sheng-Fan Wang
- Department of Pharmacy, Taipei Veterans General Hospital, 112 Taipei
- School of Pharmacy, Taipei Medical University, 110 Taipei
- Department and Institute of Pharmacology, School of Medicine, National Yang-Ming University, 112 Taipei
| | - Shiuan Chen
- Department of Cancer Biology, Beckman Research Institute of the City of Hope, CA 91010, USA
| | - Ling-Ming Tseng
- Division of General Surgery, Department of Surgery, Comprehensive Breast Health Center, Taipei Veterans General Hospital, 112 Taipei
- Department of Surgery, School of Medicine, National Yang-Ming University, 112 Taipei
| | - Hsin-Chen Lee
- Department and Institute of Pharmacology, School of Medicine, National Yang-Ming University, 112 Taipei
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22
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Gyllenhammer LE, Entringer S, Buss C, Wadhwa PD. Developmental programming of mitochondrial biology: a conceptual framework and review. Proc Biol Sci 2020; 287:20192713. [PMID: 32345161 PMCID: PMC7282904 DOI: 10.1098/rspb.2019.2713] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Research on mechanisms underlying the phenomenon of developmental programming of health and disease has focused primarily on processes that are specific to cell types, organs and phenotypes of interest. However, the observation that exposure to suboptimal or adverse developmental conditions concomitantly influences a broad range of phenotypes suggests that these exposures may additionally exert effects through cellular mechanisms that are common, or shared, across these different cell and tissue types. It is in this context that we focus on cellular bioenergetics and propose that mitochondria, bioenergetic and signalling organelles, may represent a key cellular target underlying developmental programming. In this review, we discuss empirical findings in animals and humans that suggest that key structural and functional features of mitochondrial biology exhibit developmental plasticity, and are influenced by the same physiological pathways that are implicated in susceptibility for complex, common age-related disorders, and that these targets of mitochondrial developmental programming exhibit long-term temporal stability. We conclude by articulating current knowledge gaps and propose future research directions to bridge these gaps.
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Affiliation(s)
- Lauren E Gyllenhammer
- Development, Health and Disease Research Program, School of Medicine, Irvine, CA, USA.,Department of Pediatrics, School of Medicine, Irvine, CA, USA
| | - Sonja Entringer
- Development, Health and Disease Research Program, School of Medicine, Irvine, CA, USA.,Department of Pediatrics, School of Medicine, Irvine, CA, USA.,Charité-Universitätsmedizin Berlin, Institute of Medical Psychology, Berlin, Germany
| | - Claudia Buss
- Development, Health and Disease Research Program, School of Medicine, Irvine, CA, USA.,Department of Pediatrics, School of Medicine, Irvine, CA, USA.,Charité-Universitätsmedizin Berlin, Institute of Medical Psychology, Berlin, Germany
| | - Pathik D Wadhwa
- Development, Health and Disease Research Program, School of Medicine, Irvine, CA, USA.,Department of Pediatrics, School of Medicine, Irvine, CA, USA.,Department of Psychiatry and Human Behaviour, School of Medicine, Irvine, CA, USA.,Department of Obstetrics and Gynecology, School of Medicine, Irvine, CA, USA.,Department of Epidemiology, University of California, School of Medicine, Irvine, CA, USA
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23
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Cai N, Fňašková M, Konečná K, Fojtová M, Fajkus J, Coomber E, Watt S, Soranzo N, Preiss M, Rektor I. No Evidence of Persistence or Inheritance of Mitochondrial DNA Copy Number in Holocaust Survivors and Their Descendants. Front Genet 2020; 11:87. [PMID: 32211017 PMCID: PMC7069217 DOI: 10.3389/fgene.2020.00087] [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: 10/10/2019] [Accepted: 01/27/2020] [Indexed: 12/19/2022] Open
Abstract
Mitochondrial DNA copy number has been previously shown to be elevated with severe and chronic stress, as well as stress-related pathology like Major Depressive Disorder (MDD) and post-traumatic stress disorder (PTSD). While experimental data point to likely recovery of mtDNA copy number changes after the stressful event, time needed for full recovery and whether it can be achieved are still unknown. Further, while it has been shown that stress-related mtDNA elevation affects multiple tissues, its specific consequences for oogenesis and maternal inheritance of mtDNA has never been explored. In this study, we used qPCR to quantify mtDNA copy number in 15 Holocaust survivors and 102 of their second- and third-generation descendants from the Czech Republic, many of whom suffer from PTSD, and compared them to controls in the respective generations. We found no significant difference in mtDNA copy number in the Holocaust survivors compared to controls, whether they have PTSD or not, and no significant elevation in descendants of female Holocaust survivors as compared to descendants of male survivors or controls. Our results showed no evidence of persistence or inheritance of mtDNA changes in Holocaust survivors, though that does not rule out effects in other tissues or mitigating mechanism for such changes.
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Affiliation(s)
- Na Cai
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom.,European Bioinformatics Institute (EMBL-EBI), Wellcome Genome Campus, Hinxton, United Kingdom
| | - Monika Fňašková
- Neuroscience Centre, CEITEC, Masaryk University, Brno, Czechia.,1st Neurology Department, Hospital St Anne and School of Medicine, Masaryk University, Brno, Czechia
| | - Klára Konečná
- Mendel Centre for Plant Genomics and Proteomics, CEITEC, Masaryk University, Brno, Czechia.,National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czechia
| | - Miloslava Fojtová
- Mendel Centre for Plant Genomics and Proteomics, CEITEC, Masaryk University, Brno, Czechia.,National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czechia
| | - Jiří Fajkus
- Mendel Centre for Plant Genomics and Proteomics, CEITEC, Masaryk University, Brno, Czechia.,National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czechia
| | - Eve Coomber
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | - Stephen Watt
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | - Nicole Soranzo
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | - Marek Preiss
- Neuroscience Centre, CEITEC, Masaryk University, Brno, Czechia
| | - Ivan Rektor
- Neuroscience Centre, CEITEC, Masaryk University, Brno, Czechia
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24
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Gentiluomo M, Katzke VA, Kaaks R, Tjønneland A, Severi G, Perduca V, Boutron-Ruault MC, Weiderpass E, Ferrari P, Johnson T, Schulze MB, Bergmann M, Trichopoulou A, Karakatsani A, La Vecchia C, Palli D, Grioni S, Panico S, Tumino R, Sacerdote C, Bueno-de-Mesquita B, Vermeulen R, Sandanger TM, Quirós JR, Rodriguez-Barranco M, Amiano P, Colorado-Yohar S, Ardanaz E, Sund M, Khaw KT, Wareham NJ, Schmidt JA, Jakszyn P, Morelli L, Canzian F, Campa D. Mitochondrial DNA Copy-Number Variation and Pancreatic Cancer Risk in the Prospective EPIC Cohort. Cancer Epidemiol Biomarkers Prev 2020; 29:681-686. [PMID: 31932413 PMCID: PMC7611119 DOI: 10.1158/1055-9965.epi-19-0868] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 10/28/2019] [Accepted: 01/07/2020] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Mitochondrial DNA (mtDNA) copy number in peripheral blood has been found to be associated with risk of developing several cancers. However, data on pancreatic ductal adenocarcinoma (PDAC) are very limited. METHODS To further our knowledge on this topic, we measured relative mtDNA copy number by a quantitative real-time PCR assay in peripheral leukocyte samples of 476 PDAC cases and 357 controls nested within the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort. RESULTS We observed lower mtDNA copy number with advancing age (P = 6.54 × 10-5) and with a high body mass index (BMI) level (P = 0.004) and no association with sex, smoking behavior, and alcohol consumption. We found an association between increased mtDNA copy number and decreased risk of developing PDAC with an odds ratios (OR) of 0.35 [95% confidence interval (CI), 0.16-0.79; P = 0.01] when comparing the fifth quintile with the first using an unconditional logistic regression and an OR of 0.19 (95% CI, 0.07-0.52; P = 0.001) with a conditional analysis. Analyses stratified by BMI showed an association between high mtDNA copy number and decreased risk in the stratum of normal weight, consistent with the main analyses. CONCLUSIONS Our results suggest a protective effect of a higher number of mitochondria, measured in peripheral blood leukocytes, on PDAC risk. IMPACT Our findings highlight the importance of understanding the mitochondrial biology in pancreatic cancer.
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Affiliation(s)
- Manuel Gentiluomo
- Department of Biology, University of Pisa, Pisa, Italy
- Genomic Epidemiology Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Verena A Katzke
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Rudolf Kaaks
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Anne Tjønneland
- Danish Cancer Society Research Center, Copenhagen, Denmark
- Department of Public Health, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Gianluca Severi
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, Villejuif, France
- Gustave Roussy, Villejuif, France
| | - Vittorio Perduca
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, Villejuif, France
- Gustave Roussy, Villejuif, France
- Laboratoire de Mathématiques Appliquées MAP5 (UMR CNRS 8145), Université Paris Descartes, Paris, France
| | - Marie-Christine Boutron-Ruault
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, Villejuif, France
- Gustave Roussy, Villejuif, France
| | - Elisabete Weiderpass
- International Agency for Research on Cancer, World Health Organization, Lyon, France
| | - Pietro Ferrari
- International Agency for Research on Cancer, World Health Organization, Lyon, France
| | - Theron Johnson
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Matthias B Schulze
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
- Institute of Nutritional Sciences, University of Potsdam, Nuthetal, Germany
| | - Manuela Bergmann
- Human Study Center, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
| | | | - Anna Karakatsani
- Hellenic Health Foundation, Athens, Greece
- Pulmonary Medicine Department, School of Medicine, National and Kapodistrian University of Athens, Attikon University Hospital, Haidari, Greece
| | - Carlo La Vecchia
- Hellenic Health Foundation, Athens, Greece
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milano, Italy
| | - Domenico Palli
- Cancer Risk Factors and Life-Style Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network - ISPRO, Florence, Italy
| | - Sara Grioni
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milano, Italy
| | - Salvatore Panico
- Dipartimento di medicina clinica e chirurgia, Federico II University, Naples, Italy
| | - Rosario Tumino
- Cancer Registry and Histopathology Department, Azienda Sanitaria Provinciale Ragusa (ASP), Ragusa, Italy
| | - Carlotta Sacerdote
- Unit of Cancer Epidemiology, Città della Salute e della Scienza University Hospital and Center for Cancer Prevention (CPO), Turin, Italy
| | - Bas Bueno-de-Mesquita
- Department for Determinants of Chronic Diseases (DCD), National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
- Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, St. Mary's Campus, London, United Kingdom
| | - Roel Vermeulen
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands
- Environmental Epidemiology Division, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
| | - Torkjel M Sandanger
- Departement of Community Medicine, UiT-the Arctic University of Norway, Troms, Norway
| | | | - Miguel Rodriguez-Barranco
- Andalusian School of Public Health (EASP), Granada, Spain
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Universidad de Granada, Granada, Spain
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | - Pilar Amiano
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
- Public Health Division of Gipuzkoa, Biodonostia Research Institute, Health Department, San Sebastian, Spain
| | - Sandra Colorado-Yohar
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
- Department of Epidemiology, Murcia Regional Health Council, IMIB-Arrixaca, Murcia, Spain
- Research Group on Demography and Health, National Faculty of Public Health, University of Antioquia, MedellÌn, Colombia
| | - Eva Ardanaz
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
- Navarra Public Health Institute, Pamplona, Spain
- IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - Malin Sund
- Department of Surgical and Perioperative Sciences/Surgery, Umeå University, Umeå, Sweden
| | - Kay-Tee Khaw
- University of Cambridge, School of Clinical Medicine Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Nicholas J Wareham
- MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge, United Kingdom
| | - Julie A Schmidt
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom
| | - Paula Jakszyn
- Unit of Nutrition and Cancer, Cancer Epidemiology Research Program, Catalan Institute of Oncology-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain
- Facultat Ciències Salut Blanquerna, Universitat Ramon Llull, Barcelona, Spain
| | - Luca Morelli
- General Surgery, Department of Surgery, Translational and New Technologies, University of Pisa, Pisa, Italy
- EndoCAS (Center for Computer Assisted Surgery), University of Pisa, Pisa, Italy
| | - Federico Canzian
- Genomic Epidemiology Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Daniele Campa
- Department of Biology, University of Pisa, Pisa, Italy.
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25
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Liu B, Song L, Zhang L, Wu M, Wang L, Cao Z, Zhang B, Xu S, Wang Y. Prenatal aluminum exposure is associated with increased newborn mitochondrial DNA copy number. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 252:330-335. [PMID: 31158661 DOI: 10.1016/j.envpol.2019.05.116] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/15/2019] [Accepted: 05/22/2019] [Indexed: 05/15/2023]
Abstract
Aluminum is a widely distributed metal that has been reported to have embryotoxicity and fetotoxicity in animal studies. However, there has been no study of the association between prenatal aluminum exposure and newborn mitochondrial DNA copy number (mtDNAcn). We aimed to investigate the effect of prenatal aluminum exposure on newborn mtDNAcn. A total of 762 mother-newborn pairs were recruited between November 2013 and March 2015 in Wuhan city, China. We measured maternal urinary aluminum concentrations at three trimesters of pregnancy. Relative mtDNAcn was measured in DNA extracted from umbilical cord blood samples. We used generalized estimating equations to assess the relationship between prenatal aluminum exposure and newborn mtDNAcn. The geometric means of creatinine corrected aluminum concentrations were 31.0 μg/g Cr (95% CI: 27.6, 34.7), 40.9 μg/g Cr (95% CI: 35.7, 46.8) and 58.4 μg/g Cr (95% CI: 51.2, 67.4) for the first, second and third trimesters, respectively. After adjustment for potential confounding factors, a doubling of maternal urinary aluminum concentrations during the second and third trimesters was related to 3.16% (95% CI: 0.88, 5.49) and 4.20% (95% CI: 1.64, 6.81) increases in newborn mtDNAcn, respectively, while the association between maternal urinary aluminum concentration during the first trimester and newborn mtDNAcn was not significant (percent difference: 0.70%, 95% CI: -2.25, 3.73). Prenatal aluminum exposure during the second and third trimesters was positively associated with newborn mtDNAcn. Further studies are essential to elucidate on the potential health consequences of newborn mtDNAcn.
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Affiliation(s)
- Bingqing Liu
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, 430030, Hubei, Wuhan, China
| | - Lulu Song
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, 430030, Hubei, Wuhan, China
| | - Lina Zhang
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, 430030, Hubei, Wuhan, China
| | - Mingyang Wu
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, 430030, Hubei, Wuhan, China
| | - Lulin Wang
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, 430030, Hubei, Wuhan, China
| | - Zhongqiang Cao
- Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Hongkong Road 100, 430030, Hubei, Wuhan, China
| | - Bin Zhang
- Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Hongkong Road 100, 430030, Hubei, Wuhan, China
| | - Shunqing Xu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Youjie Wang
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, 430030, Hubei, Wuhan, China.
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26
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Circulating Mitochondrial DNA is Linked to Progression and Prognosis of Epithelial Ovarian Cancer. Transl Oncol 2019; 12:1213-1220. [PMID: 31271962 PMCID: PMC6609736 DOI: 10.1016/j.tranon.2019.05.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/12/2019] [Accepted: 05/15/2019] [Indexed: 02/08/2023] Open
Abstract
As peripheral blood contains fluctuated levels of circulating cell-free mitochondrial DNA (ccf mtDNA), we aimed to evaluate ccf mtDNA as a biomarker for diagnosis and prognosis of epithelial ovarian cancer (EOC). In the present study, we recruited 165 EOC patients and 60 healthy women. Quantitative RT-PCR was applied to amplify 79-bp and 230-bp fragments of the mitochondrial 16 s RNA gene in sera of these participants. MtDNA integrity was defined as the ratio of long to short mtDNA fragments. We observed that the levels of mtDNA79 and mtDNA230 were significantly increased (P = .0001), whereas the mtDNA integrity (P = .0001) was decreased in EOC patients compared with those in healthy controls. MtDNA79 showed a sensitivity of 90.3% and a specificity of 81.7% (AUC = 0.900) to discriminate EOC from healthy controls. Moreover, the amounts of mtDNA79 (P = .0001, P = .012, P = .039) and mtDNA230 (P = .0001, P = .042) continuously raised from healthy controls over FIGO I-II to FIGO III and IV, with highest levels of mtDNA79 (P = .0001) and mtDNA230 (P = .0001) in FIGO III and IV. Increasing levels of mtDNA79 (P = .003, P = .0001) and mtDNA230 (P = .041, P = .0001) were also associated with lymph node metastasis and CA125 values. The higher levels of mtDNA79 (P = .0001; HR 3.2, 95%CI:1.6-6.3) and mtDNA230 (borderline P = .048, HR 0.9, 95%CI:0.9-1.0) also correlated with poor patients' overall survival, of which mtDNA79 could act as an independent factor for overall survival. Our data show a significant association of increasing levels of ccf mtDNA with EOC progress and poor prognosis.
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27
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Baek JH, Son H, Jeong YH, Park SW, Kim HJ. Chronological Aging Standard Curves of Telomere Length and Mitochondrial DNA Copy Number in Twelve Tissues of C57BL/6 Male Mouse. Cells 2019; 8:cells8030247. [PMID: 30875959 PMCID: PMC6468494 DOI: 10.3390/cells8030247] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/11/2019] [Accepted: 03/12/2019] [Indexed: 12/18/2022] Open
Abstract
The changes in telomere length and mitochondrial DNA copy number (mtDNAcn) are considered to be aging markers. However, many studies have provided contradictory or only fragmentary information about changes of these markers in animal models, due to inaccurate analysis methods and a lack of objective aging standards. To establish chronological aging standards for these two markers, we analyzed telomere length and mtDNAcn in 12 tissues-leukocytes, prefrontal cortex, hippocampus, pituitary gland, adrenal gland, retina, aorta, liver, kidney, spleen, skeletal muscle, and skin-from a commonly used rodent model, C57BL/6 male mice aged 2⁻24 months. It was found that at least one of the markers changed age-dependently in all tissues. In the leukocytes, hippocampus, retina, and skeletal muscle, both markers changed age-dependently. As a practical application, the aging marker changes were analyzed after chronic immobilization stress (CIS) to see whether CIS accelerated aging or not. The degree of tissue-aging was calculated using each standard curve and found that CIS accelerated aging in a tissue-specific manner. Therefore, it is expected that researchers can use our standard curves to objectively estimate tissue-specific aging accelerating effects of experimental conditions for least 12 tissues in C57BL/6 male mice.
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Affiliation(s)
- Ji Hyeong Baek
- Department of Anatomy and Convergence Medical Sciences, Gyeongsang National University School of Medicine, Jinju 52727, Korea.
- Institute of Health Sciences, Bio Anti-aging Medical Research Center, Gyeongsang National University, Jinju 52727, Korea.
| | - Hyeonwi Son
- Department of Anatomy and Convergence Medical Sciences, Gyeongsang National University School of Medicine, Jinju 52727, Korea.
- Institute of Health Sciences, Bio Anti-aging Medical Research Center, Gyeongsang National University, Jinju 52727, Korea.
| | - Young-Hoon Jeong
- Institute of Health Sciences, Bio Anti-aging Medical Research Center, Gyeongsang National University, Jinju 52727, Korea.
- Department of Internal Medicine, Gyeongsang National University School of Medicine and Cardiovascular Center, Gyeongsang National University Changwon Hospital, Changwon 51472, Korea.
| | - Sang Won Park
- Institute of Health Sciences, Bio Anti-aging Medical Research Center, Gyeongsang National University, Jinju 52727, Korea.
- Department of Pharmacology and Convergence Medical Sciences, Gyeongsang National University School of Medicine, Jinju 52727, Korea.
| | - Hyun Joon Kim
- Department of Anatomy and Convergence Medical Sciences, Gyeongsang National University School of Medicine, Jinju 52727, Korea.
- Institute of Health Sciences, Bio Anti-aging Medical Research Center, Gyeongsang National University, Jinju 52727, Korea.
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28
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Berky AJ, Ryde IT, Feingold B, Ortiz EJ, Wyatt LH, Weinhouse C, Hsu-Kim H, Meyer JN, Pan WK. Predictors of mitochondrial DNA copy number and damage in a mercury-exposed rural Peruvian population near artisanal and small-scale gold mining: An exploratory study. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2019; 60:197-210. [PMID: 30289587 PMCID: PMC6452630 DOI: 10.1002/em.22244] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 07/22/2018] [Accepted: 07/31/2018] [Indexed: 05/22/2023]
Abstract
Mitochondrial DNA (mtDNA) copy number (CN) and damage in circulating white blood cells have been proposed as effect biomarkers for pollutant exposures. Studies have shown that mercury accumulates in mitochondria and affects mitochondrial function and integrity; however, these data are derived largely from experiments in model systems, rather than human population studies that evaluate the potential utility of mitochondrial exposure biomarkers. We measured mtDNA CN and damage in white blood cells (WBCs) from 83 residents of nine communities in the Madre de Dios region of the Peruvian Amazon that vary in proximity to artisanal and small-scale gold mining. Prior research from this region reported high levels of mercury in fish and a significant association between food consumption and human total hair mercury level of residents. We observed that mtDNA CN and damage were both associated with consumption of fruit and vegetables, higher diversity of fruit consumed, residential location, and health characteristics, suggesting common environmental drivers. Surprisingly, we observed negative associations of mtDNA damage with both obesity and age. We did not observe any association between total hair mercury or, in contrast to previous results, age, with either mtDNA damage or CN. The results of this exploratory study highlight the importance of combining epidemiological and laboratory research in studying the effects of stressors on mitochondria, suggesting that future work should incorporate nutritional and social characteristics, and caution should be taken when applying conclusions from epidemiological studies conducted in the developed world to other regions, as results may not be easily translated. Environ. Mol. Mutagen. 60: 197-210, 2019. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Axel J. Berky
- Nicholas School of the Environment, Box 90328, Duke University, Durham, NC 27708, USA
| | - Ian T. Ryde
- Nicholas School of the Environment, Box 90328, Duke University, Durham, NC 27708, USA
| | - Beth Feingold
- University of Albany, School of Public Health, Rensselaer, NY 12144, USA
| | - Ernesto J. Ortiz
- Duke Global Health Institute, Duke University, 310 Trent Dr, Durham, NC 27710, USA
| | - Lauren H. Wyatt
- Nicholas School of the Environment, Box 90328, Duke University, Durham, NC 27708, USA
| | - Caren Weinhouse
- Duke Global Health Institute, Duke University, 310 Trent Dr, Durham, NC 27710, USA
| | - Heileen Hsu-Kim
- Department of Civil and Engineering, Box 90287, Duke University, Durham, NC 27708, USA
| | - Joel N. Meyer
- Nicholas School of the Environment, Box 90328, Duke University, Durham, NC 27708, USA
- Corresponding authors: William Pan, Duke Global Health Institute, 310 Trent Drive, Campus Box 90519, Durham, NC 27708, fax 681-7748, , Joel N. Meyer, Nicholas School of the Environment, Box 90328, Duke University, Durham, NC 27708, USA,
| | - William K. Pan
- Nicholas School of the Environment, Box 90328, Duke University, Durham, NC 27708, USA
- Duke Global Health Institute, Duke University, 310 Trent Dr, Durham, NC 27710, USA
- Corresponding authors: William Pan, Duke Global Health Institute, 310 Trent Drive, Campus Box 90519, Durham, NC 27708, fax 681-7748, , Joel N. Meyer, Nicholas School of the Environment, Box 90328, Duke University, Durham, NC 27708, USA,
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29
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Abstract
Mitochondria are essential intracellular organelles that are responsible for energy metabolism, cell growth, and differentiation, redox homeostasis, oncogenic signaling, and apoptosis. These multifunctional organelles have been implicated in cancer initiation, progression, and metastasis, relapse, and acquired drug resistance due to metabolic alterations in transformed cells. Maternally inherited mitochondrial DNA (mtDNA) is thought to contribute to cancer development and prognosis and proposed as a therapeutic target for cancer treatment. In this review, we summarize the current knowledge of mtDNA alterations, with a specific focus on somatic changes, germline variants, haplogroups, large deletions, and mtDNA content changes associated with cancer susceptibility and prognosis. We also discuss the potential of mtDNA as biomarkers of cancer detection and targets of cancer treatment. Deeper understanding of the mechanisms underlying these associations requires further investigation.
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30
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Wang L, Lv H, Ji P, Zhu X, Yuan H, Jin G, Dai J, Hu Z, Su Y, Ma H. Mitochondrial DNA copy number is associated with risk of head and neck squamous cell carcinoma in Chinese population. Cancer Med 2018; 7:2776-2782. [PMID: 29673117 PMCID: PMC6010846 DOI: 10.1002/cam4.1452] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Revised: 11/10/2017] [Accepted: 11/14/2017] [Indexed: 12/23/2022] Open
Abstract
Mitochondria show the special role in cellular bioenergy and many essential physiological activities. Previous researches have suggested that variations of mitochondrial DNA copy number contribute to development of different types of carcinomas. However, the relationship of mtDNA copy number in peripheral blood leukocytes (PBLs) with the risk of head and neck squamous cell carcinoma (HNSCC) is still inconclusive. We investigated the association of mtDNA with HNSCC risk through a case-control study including 570 HNSCC cases and 597 cancer-free controls. mtDNA copy number in PBLs was measured by real-time qPCR. Logistic regression was performed to estimate the association between the mtDNA copy number in PBLs and HNSCC risk. A U-shaped relation between the mtDNA copy number and HNSCC risk was found. Compared with those in the second quartile group, the adjusted odds ratios (ORs) and 95% confidence interval (CI) for those in the first and the forth quartile groups were 1.95 (1.37-2.76) and 2.16 (1.53-3.04), respectively. Using restricted cubic spline analysis, we confirmed such a significant U-shaped relation. Furthermore, the U-shaped association remained significant in different subgroups stratified by age, gender, tobacco smoking, and alcohol consumption. Both extremely low and high mtDNA copy numbers had significant associations with the increased HNSCC risk.
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Affiliation(s)
- Lihua Wang
- Department of EpidemiologySchool of Public HealthNanjing Medical UniversityNanjing211166China
| | - Hong Lv
- Department of EpidemiologySchool of Public HealthNanjing Medical UniversityNanjing211166China
| | - Pei Ji
- Department of EpidemiologySchool of Public HealthNanjing Medical UniversityNanjing211166China
| | - Xun Zhu
- Department of EpidemiologySchool of Public HealthNanjing Medical UniversityNanjing211166China
| | - Hua Yuan
- Jiangsu Key Laboratory of Oral DiseasesNanjing Medical UniversityNanjing210029China
| | - Guangfu Jin
- Department of EpidemiologySchool of Public HealthNanjing Medical UniversityNanjing211166China
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and TreatmentCollaborative Innovation Center of Cancer MedicineNanjing Medical UniversityNanjing211166China
| | - Juncheng Dai
- Department of EpidemiologySchool of Public HealthNanjing Medical UniversityNanjing211166China
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and TreatmentCollaborative Innovation Center of Cancer MedicineNanjing Medical UniversityNanjing211166China
| | - Zhibin Hu
- Department of EpidemiologySchool of Public HealthNanjing Medical UniversityNanjing211166China
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and TreatmentCollaborative Innovation Center of Cancer MedicineNanjing Medical UniversityNanjing211166China
| | - Yuxiong Su
- Oral and Maxillofacial SurgeryFaculty of DentistryThe University of Hong KongHong Kong
| | - Hongxia Ma
- Department of EpidemiologySchool of Public HealthNanjing Medical UniversityNanjing211166China
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and TreatmentCollaborative Innovation Center of Cancer MedicineNanjing Medical UniversityNanjing211166China
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Associations of blood mitochondrial DNA copy number with social-demographics and cancer risk: results from the Mano-A-Mano Mexican American Cohort. Oncotarget 2018; 9:25491-25502. [PMID: 29876003 PMCID: PMC5986640 DOI: 10.18632/oncotarget.25321] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 04/16/2018] [Indexed: 11/25/2022] Open
Abstract
The relationship between blood mitochondrial DNA (mtDNA) copy number and subsequent cancer risk has been investigated previously. However, such association has never been examined in Mexican Americans. In the current study, we examined association between social-demographic factors and blood mtDNA copy number, as well as longitudinal relationship between cancer and mtDNA copy number, among 10,802 Mexican Americans in the Mano-A-Mano Mexican American Cohort. Overall, mtDNA copy number was statistically significantly higher among participants who developed cancer during the study period than among cancer-free controls (0.17 vs 0.13, P = 0.007). Among cancer-free control participants, mtDNA copy number significantly differed by social-demographic characteristics. However, there was a large degree of heterogeneity in these effects across the mtDNA copy number distribution. In the longitudinal analysis, we observed that higher mtDNA copy number was positively associated with increased risk of all cancer types (adjusted hazard ratio [HR], 1.13; 95% confidence interval [CI], 1.09–1.17). Participants with mtDNA copy number in the fourth (highest) quartile had a higher risk of all cancer (adjusted HR, 2.12; 95% CI, 1.65–2.73) than did participants in the first (lowest) quartile. In summary, our results in Mexican Americans support an association between increased mtDNA copy number and cancer risk. Our results also suggest that mtDNA copy number may be influenced by social and demographic factors.
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Grazioli S, Pugin J. Mitochondrial Damage-Associated Molecular Patterns: From Inflammatory Signaling to Human Diseases. Front Immunol 2018; 9:832. [PMID: 29780380 PMCID: PMC5946030 DOI: 10.3389/fimmu.2018.00832] [Citation(s) in RCA: 241] [Impact Index Per Article: 40.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 04/05/2018] [Indexed: 12/20/2022] Open
Abstract
Over the recent years, much has been unraveled about the pro-inflammatory properties of various mitochondrial molecules once they are leaving the mitochondrial compartment. On entering the cytoplasm or the extracellular space, mitochondrial DAMPs (also known as mitochondrial alarmins) can become pro-inflammatory and initiate innate and adaptive immune responses by activating cell surface and intracellular receptors. Current evidence indicates that uncontrolled and excessive release of mitochondrial DAMPs is associated with severity, has prognosis value in human diseases, and contributes to the dysregulated process observed in numerous inflammatory and autoimmune conditions, as well as in ischemic heart disease and cancer. Herein, we review that the expanding research field of mitochondrial DAMPs in innate immune responses and the current knowledge on the association between mitochondrial DAMPs and human diseases.
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Affiliation(s)
- Serge Grazioli
- Pediatric Intensive Care Unit, Department of Pediatrics, University Hospital of Geneva, University of Geneva, Geneva, Switzerland.,Department of Microbiology and Molecular Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Jérôme Pugin
- Intensive Care Unit, Department of Anesthesiology, Faculty of Medicine, University Hospital of Geneva, University of Geneva, Geneva, Switzerland
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Campa D, Barrdahl M, Santoro A, Severi G, Baglietto L, Omichessan H, Tumino R, Bueno-de-Mesquita HB, Peeters PH, Weiderpass E, Chirlaque MD, Rodríguez-Barranco M, Agudo A, Gunter M, Dossus L, Krogh V, Matullo G, Trichopoulou A, Travis RC, Canzian F, Kaaks R. Mitochondrial DNA copy number variation, leukocyte telomere length, and breast cancer risk in the European Prospective Investigation into Cancer and Nutrition (EPIC) study. Breast Cancer Res 2018; 20:29. [PMID: 29665866 PMCID: PMC5905156 DOI: 10.1186/s13058-018-0955-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 03/13/2018] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Leukocyte telomere length (LTL) and mitochondrial genome (mtDNA) copy number and deletions have been proposed as risk markers for various cancer types, including breast cancer (BC). METHODS To gain a more comprehensive picture on how these markers can modulate BC risk, alone or in conjunction, we performed simultaneous measurements of LTL and mtDNA copy number in up to 570 BC cases and 538 controls from the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort. As a first step, we measured LTL and mtDNA copy number in 96 individuals for which a blood sample had been collected twice with an interval of 15 years. RESULTS According to the intraclass correlation (ICC), we found very good stability over the time period for both measurements, with ICCs of 0.63 for LTL and 0.60 for mtDNA copy number. In the analysis of the entire study sample, we observed that longer LTL was strongly associated with increased risk of BC (OR 2.71, 95% CI 1.58-4.65, p = 3.07 × 10- 4 for highest vs. lowest quartile; OR 3.20, 95% CI 1.57-6.55, p = 1.41 × 10- 3 as a continuous variable). We did not find any association between mtDNA copy number and BC risk; however, when considering only the functional copies, we observed an increased risk of developing estrogen receptor-positive BC (OR 2.47, 95% CI 1.05-5.80, p = 0.04 for highest vs. lowest quartile). CONCLUSIONS We observed a very good correlation between the markers over a period of 15 years. We confirm a role of LTL in BC carcinogenesis and suggest an effect of mtDNA copy number on BC risk.
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Affiliation(s)
- Daniele Campa
- Department of Biology, University of Pisa, Pisa, Italy
| | - Myrto Barrdahl
- Division of Cancer Epidemiology, German Cancer Research Center/Deutsches Krebsforschungszentrum (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Aurelia Santoro
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, Bologna, Italy
| | - Gianluca Severi
- Centre de Recherche en épidémiologie et Santé des populations (CESP), Faculté de médecine - Université Paris-Sud, Faculté de médecine - Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national de la santé et de la recherche médicale (INSERM), Université Paris-Saclay, 94805 Villejuif, France
- Institut Gustave Roussy, F-94805 Villejuif, France
| | - Laura Baglietto
- Centre de Recherche en épidémiologie et Santé des populations (CESP), Faculté de médecine - Université Paris-Sud, Faculté de médecine - Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national de la santé et de la recherche médicale (INSERM), Université Paris-Saclay, 94805 Villejuif, France
- Institut Gustave Roussy, F-94805 Villejuif, France
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Hanane Omichessan
- Centre de Recherche en épidémiologie et Santé des populations (CESP), Faculté de médecine - Université Paris-Sud, Faculté de médecine - Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national de la santé et de la recherche médicale (INSERM), Université Paris-Saclay, 94805 Villejuif, France
- Institut Gustave Roussy, F-94805 Villejuif, France
| | - Rosario Tumino
- Cancer Registry and Histopathology Department, “Civic - M.P. Arezzo” Hospital, Azienda Sanitaria Provinciale Di Ragusa, Ragusa, Italy
| | - H. B(as). Bueno-de-Mesquita
- Department for Determinants of Chronic Diseases (DCD), National Institute for Public Health and the Environment (RIVM), PO Box 1, 3720 BA Bilthoven, The Netherlands
- Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, St. Mary’s Campus, Norfolk Place, London, W2 1PG UK
- Department of Social & Preventive Medicine, Faculty of Medicine, University of Malaya, Pantai Valley, 50603 Kuala Lumpur, Malaysia
| | - Petra H. Peeters
- Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
- Department of Epidemiology and Biostatistics, Medical Research Council-Public Health England (MRC-PHE) Centre for Environment and Health, School of Public Health, Imperial College London, London, UK
| | - Elisabete Weiderpass
- Department of Community Medicine, Faculty of Health Sciences, University of Tromsø, The Arctic University of Norway, Tromsø, Norway
- Department of Research, Cancer Registry of Norway, Institute of Population-Based Cancer Research, Oslo, Norway
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
- Genetic Epidemiology Group, Folkhälsan Research Center, Helsinki, Finland
| | - Maria-Dolores Chirlaque
- Department of Epidemiology, Regional Health Council, Biomedical Research Institute of Murcia (IMIB-Arrixaca), Murcia, Spain
- Consorcio de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Department of Health and Social Sciences, Universidad de Murcia, Murcia, Spain
| | - Miguel Rodríguez-Barranco
- Consorcio de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Department of Health and Social Sciences, Universidad de Murcia, Murcia, Spain
- Escuela Andaluza de Salud Pública, Instituto de Investigación Biosanitaria (ibs.GRANADA), Hospitales Universitarios de Granada/Universidad de Granada, Granada, Spain
| | - Antonio Agudo
- Unit of Nutrition and Cancer, Bellvitge Biomedical Research Institute (IDIBELL), Catalan Institute of Oncology, L’Hospitalet de Llobregat, 08908 Barcelona, Spain
| | - Marc Gunter
- International Agency for Research on Cancer, Lyon, France
| | - Laure Dossus
- International Agency for Research on Cancer, Lyon, France
| | - Vittorio Krogh
- Epidemiology and Prevention Unit, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS)-Istituto Nazionale dei Tumori, Via Venezian, 120133 Milan, Italy
| | - Giuseppe Matullo
- Department Medical Sciences, University of Torino and Human Genetics Foundation (HuGeF), Torino, Italy
| | | | - Ruth C. Travis
- Cancer Epidemiology Unit, Nuffield Department of Population Health University of Oxford, Oxford, OX3 0NR UK
| | - Federico Canzian
- Genomic Epidemiology Group, German Cancer Research Center/Deutsches Krebsforschungszentrum (DKFZ), Heidelberg, Germany
| | - Rudolf Kaaks
- Division of Cancer Epidemiology, German Cancer Research Center/Deutsches Krebsforschungszentrum (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
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Jain A, Bakhshi S, Thakkar H, Gerards M, Singh A. Elevated mitochondrial DNA copy numbers in pediatric acute lymphoblastic leukemia: A potential biomarker for predicting inferior survival. Pediatr Blood Cancer 2018; 65. [PMID: 29134740 DOI: 10.1002/pbc.26874] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 09/27/2017] [Accepted: 10/02/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND Studies on mitochondrial DNA copy number reveal an increase or decrease in copy number that appears to be cancer specific, but data on acute lymphoblastic leukemia have been inconsistent regarding the significance of changes in mitochondrial DNA copies. The purpose of this pilot study was to analyze mitochondrial DNA copy number and mitochondrial DNA integrity. PROCEDURE Copy number and mitochondrial deletion ratios were estimated in the bone marrow of 51 patients and peripheral blood of 30 healthy controls using quantitative real-time PCR. The copy number values were correlated with prognostic markers in patients. RESULTS Significantly increased mitochondrial DNA copy number (P-value < 0.0001) and increased mitochondrial deletion ratios (P-value = 0.0018) were observed in patients compared with controls. The copy numbers were significantly decreased in patients after chemotherapy (P-value = 0.0232). Patients with higher copy numbers exhibited significantly inferior survival than patients with lower copy numbers (for event-free survival, P-value = 0.04 and overall survival, P-value = 0.1175). CONCLUSIONS Significant decreases in mitochondrial DNA copy number with therapy indicates that copy number could be evaluated as a potential marker for therapeutic efficacy and a higher mitochondrial DNA copy number could be a poor prognostic marker.
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Affiliation(s)
- Ayushi Jain
- Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Sameer Bakhshi
- Department of Medical Oncology, B.R. Ambedkar Institute Rotary Cancer Hospital, AIIMS, New Delhi, India
| | - Himani Thakkar
- Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Mike Gerards
- Maastricht Centre for Systems Biology (MaCS-Bio), Maastricht University, Maastricht, The Netherlands
| | - Archna Singh
- Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), New Delhi, India
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Qian Y, Butler TJ, Opsahl-Ong K, Giroux NS, Sidore C, Nagaraja R, Cucca F, Ferrucci L, Abecasis GR, Schlessinger D, Ding J. fastMitoCalc: an ultra-fast program to estimate mitochondrial DNA copy number from whole-genome sequences. Bioinformatics 2018; 33:1399-1401. [PMID: 28453676 DOI: 10.1093/bioinformatics/btw835] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 12/31/2016] [Indexed: 12/16/2022] Open
Abstract
Availability and Implementation fastMitoCalc is available at https://lgsun.irp.nia.nih.gov/hsgu/software/mitoAnalyzer/index.html. Contact jun.ding@nih.gov. Supplementary information Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Yong Qian
- Laboratory of Genetics and Genomics, National Institute on Aging, NIH, Baltimore, MD, USA
| | - Thomas J Butler
- Laboratory of Genetics and Genomics, National Institute on Aging, NIH, Baltimore, MD, USA
| | - Krista Opsahl-Ong
- Laboratory of Genetics and Genomics, National Institute on Aging, NIH, Baltimore, MD, USA
| | - Nicholas S Giroux
- Laboratory of Genetics and Genomics, National Institute on Aging, NIH, Baltimore, MD, USA
| | - Carlo Sidore
- Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche, Monserrato, Cagliari, Italy
| | - Ramaiah Nagaraja
- Laboratory of Genetics and Genomics, National Institute on Aging, NIH, Baltimore, MD, USA
| | - Francesco Cucca
- Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche, Monserrato, Cagliari, Italy
| | - Luigi Ferrucci
- Translational Gerontology Branch, National Institute on Aging, NIH, Baltimore, MD, USA
| | | | - David Schlessinger
- Laboratory of Genetics and Genomics, National Institute on Aging, NIH, Baltimore, MD, USA
| | - Jun Ding
- Laboratory of Genetics and Genomics, National Institute on Aging, NIH, Baltimore, MD, USA
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Choudhury AR, Singh KK. Mitochondrial determinants of cancer health disparities. Semin Cancer Biol 2017; 47:125-146. [PMID: 28487205 PMCID: PMC5673596 DOI: 10.1016/j.semcancer.2017.05.001] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 04/25/2017] [Accepted: 05/03/2017] [Indexed: 01/10/2023]
Abstract
Mitochondria, which are multi-functional, have been implicated in cancer initiation, progression, and metastasis due to metabolic alterations in transformed cells. Mitochondria are involved in the generation of energy, cell growth and differentiation, cellular signaling, cell cycle control, and cell death. To date, the mitochondrial basis of cancer disparities is unknown. The goal of this review is to provide an understanding and a framework of mitochondrial determinants that may contribute to cancer disparities in racially different populations. Due to maternal inheritance and ethnic-based diversity, the mitochondrial genome (mtDNA) contributes to inherited racial disparities. In people of African ancestry, several germline, population-specific haplotype variants in mtDNA as well as depletion of mtDNA have been linked to cancer predisposition and cancer disparities. Indeed, depletion of mtDNA and mutations in mtDNA or nuclear genome (nDNA)-encoded mitochondrial proteins lead to mitochondrial dysfunction and promote resistance to apoptosis, the epithelial-to-mesenchymal transition, and metastatic disease, all of which can contribute to cancer disparity and tumor aggressiveness related to racial disparities. Ethnic differences at the level of expression or genetic variations in nDNA encoding the mitochondrial proteome, including mitochondria-localized mtDNA replication and repair proteins, miRNA, transcription factors, kinases and phosphatases, and tumor suppressors and oncogenes may underlie susceptibility to high-risk and aggressive cancers found in African population and other ethnicities. The mitochondrial retrograde signaling that alters the expression profile of nuclear genes in response to dysfunctional mitochondria is a mechanism for tumorigenesis. In ethnic populations, differences in mitochondrial function may alter the cross talk between mitochondria and the nucleus at epigenetic and genetic levels, which can also contribute to cancer health disparities. Targeting mitochondrial determinants and mitochondrial retrograde signaling could provide a promising strategy for the development of selective anticancer therapy for dealing with cancer disparities. Further, agents that restore mitochondrial function to optimal levels should permit sensitivity to anticancer agents for the treatment of aggressive tumors that occur in racially diverse populations and hence help in reducing racial disparities.
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Affiliation(s)
| | - Keshav K Singh
- Departments of Genetics, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; Departments of Pathology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; Departments of Environmental Health, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; Center for Aging, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; UAB Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; Birmingham Veterans Affairs Medical Center, Birmingham, AL, 35294, USA.
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Singh B, Modica-Napolitano JS, Singh KK. Defining the momiome: Promiscuous information transfer by mobile mitochondria and the mitochondrial genome. Semin Cancer Biol 2017; 47:1-17. [PMID: 28502611 PMCID: PMC5681893 DOI: 10.1016/j.semcancer.2017.05.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 04/20/2017] [Accepted: 05/07/2017] [Indexed: 12/30/2022]
Abstract
Mitochondria are complex intracellular organelles that have long been identified as the powerhouses of eukaryotic cells because of the central role they play in oxidative metabolism. A resurgence of interest in the study of mitochondria during the past decade has revealed that mitochondria also play key roles in cell signaling, proliferation, cell metabolism and cell death, and that genetic and/or metabolic alterations in mitochondria contribute to a number of diseases, including cancer. Mitochondria have been identified as signaling organelles, capable of mediating bidirectional intracellular information transfer: anterograde (from nucleus to mitochondria) and retrograde (from mitochondria to nucleus). More recently, evidence is now building that the role of mitochondria extends to intercellular communication as well, and that the mitochondrial genome (mtDNA) and even whole mitochondria are indeed mobile and can mediate information transfer between cells. We define this promiscuous information transfer function of mitochondria and mtDNA as "momiome" to include all mobile functions of mitochondria and the mitochondrial genome. Herein, we review the "momiome" and explore its role in cancer development, progression, and treatment.
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Affiliation(s)
- Bhupendra Singh
- Department of Genetics, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | - Keshav K Singh
- Department of Genetics, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Environmental Health, Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL, USA; Center for Aging, University of Alabama at Birmingham, Birmingham, AL, USA; UAB Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA; Birmingham Veterans Affairs Medical Center, Birmingham, AL, USA.
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38
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Li H, Tian Z, Zhang Y, Yang Q, Shi B, Hou P, Ji M. Increased copy number of mitochondrial DNA predicts poor prognosis of esophageal squamous cell carcinoma. Oncol Lett 2017; 15:1014-1020. [PMID: 29422970 PMCID: PMC5772934 DOI: 10.3892/ol.2017.7416] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 09/22/2017] [Indexed: 01/10/2023] Open
Abstract
Change in mitochondrial DNA (mtDNA) copy number has been reported in esophageal squamous cell carcinoma (ESCC). However, its prognostic implication in ESCC remains largely unknown. Using reverse transcription-quantitative PCR assay, the mtDNA copy number was assessed in a cohort of patients with ESCC (n=141) and normal esophageal tissues (n=45), and the association between variable mtDNA levels and clinical outcomes of patients with ESCC were studied. Data revealed that ESCC patients exhibited an increased mtDNA content compared to control subjects. Furthermore, increased mtDNA content was associated with a significantly increased risk of cancer-associated mortality. This molecular event was associated with poorer survival in patients with ESCC, and was an independent predictor of patient survival. Data demonstrated that increased mtDNA content is a common genetic event in ESCC and may be a predictive factor of poor prognosis for ESCC patients.
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Affiliation(s)
- Heng Li
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China.,Department of Endocrinology, Xi'an Central Hospital, Xi'an, Shaanxi 710003, P.R. China
| | - Zhufang Tian
- Department of Endocrinology, Xi'an Central Hospital, Xi'an, Shaanxi 710003, P.R. China
| | - Yong Zhang
- Department of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Qi Yang
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Bingyin Shi
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Peng Hou
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Meiju Ji
- Center for Translational Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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39
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Kumar M, Srivastava S, Singh SA, Das AK, Das GC, Dhar B, Ghosh SK, Mondal R. Cell-free mitochondrial DNA copy number variation in head and neck squamous cell carcinoma: A study of non-invasive biomarker from Northeast India. Tumour Biol 2017; 39:1010428317736643. [PMID: 29072129 DOI: 10.1177/1010428317736643] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Head and neck squamous cell carcinoma is the most commonly diagnosed cancer worldwide. The lifestyle, food habits, and customary practices manifest the Northeast Indian population toward higher susceptibility to develop head and neck squamous cell carcinoma. Here, we have investigated the association of smoke and smokeless tobacco, and alcohol with copy number variation of cell-free mitochondrial DNA and cell-free nuclear DNA in cases and controls. Cell-free DNA from plasma was isolated from 50 head and neck squamous cell carcinoma cases and 50 controls with informed written consent using QIAamp Circulating Nucleic Acid Kit. Real-time polymerase chain reaction was done for copy number variation in cell-free mitochondrial DNA and cell-free nuclear DNA. Receiver operating characteristic curve analysis was performed to evaluate the diagnostic application between the two study groups using clinicopathological parameters. The levels of cell-free nuclear DNA and cell-free mitochondrial DNA of cases in association with smoke and smokeless tobacco, alcohol with smoking (p < 0.05) were significantly higher (p < 0.01 and p < 0.001, respectively) than controls. Using receiver operating characteristic curve analysis between head and neck squamous cell carcinoma cases and controls, we distinguished cell-free mitochondrial DNA (cutoff: 19.84 raw Ct; sensitivity: 84%; specificity: 100%; p < 0.001) and cell-free nuclear DNA (cutoff: 463,282 genomic equivalent/mL; sensitivity: 53%; specificity: 87%; p < 0.001). The copy number variation in cases (cell-free nuclear DNA: 5451.66 genomic equivalent/mL and cell-free mitochondrial DNA: 29,103,476.15 genomic equivalent/mL) and controls (cell-free nuclear DNA: 1650.9 genomic equivalent/mL and cell-free mitochondrial DNA: 9,189,312.54 genomic equivalent/mL), respectively. Our result indicates that the cell-free mitochondrial DNA content is highly associated with smoke and smokeless tobacco, betel quid chewing, and alcohol which shows greater promises, holding the key characteristics of diagnostic biomarkers, that is, minimal invasiveness, high specificity, and sensitivity.
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Affiliation(s)
- Manish Kumar
- 1 Molecular Medicine Laboratory, Department of Biotechnology, Assam University, Silchar, India
| | - Shilpee Srivastava
- 1 Molecular Medicine Laboratory, Department of Biotechnology, Assam University, Silchar, India
| | - Seram Anil Singh
- 2 Department of Applied Biology, University of Science and Technology, Meghalaya, India
| | | | | | - Bishal Dhar
- 1 Molecular Medicine Laboratory, Department of Biotechnology, Assam University, Silchar, India
| | - Sankar Kumar Ghosh
- 1 Molecular Medicine Laboratory, Department of Biotechnology, Assam University, Silchar, India.,4 University of Kalyani, Kalyani, India
| | - Rosy Mondal
- 5 Life Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, India
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40
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Quantification of mitochondrial DNA copy number in suspected cancer patients by a well optimized ddPCR method. BIOMOLECULAR DETECTION AND QUANTIFICATION 2017; 13:32-39. [PMID: 29021970 PMCID: PMC5634817 DOI: 10.1016/j.bdq.2017.08.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 07/21/2017] [Accepted: 08/04/2017] [Indexed: 12/22/2022]
Abstract
Changes in mitochondrial DNA (mtDNA) content is a useful clinical biomarker for various diseases, however results are controversial as several analytical factors can affect measurement of mtDNA. MtDNA is often quantified by taking ratio between a target mitochondrial gene and a reference nuclear gene (mtDNA/nDNA) using quantitative real time PCR often on two separate experiments. It measures relative levels by using external calibrator which may not be comparable across laboratories. We have developed and optimized a droplet digital PCR (ddPCR) based method for quantification of absolute copy number of both mtDNA and nDNA gene in whole blood. Finally, the role of mtDNA in suspected cancer patients referred to a cancer diagnostic center was investigated. Analytical factors which can result in false quantification of mtDNA have been optimized and both target and reference have been quantified simultaneously with intra- and inter-assay coefficient variances as 3.1% and 4.2% respectively. Quantification of mtDNA show that compared to controls, solid tumors (but not hematologic malignancies) and other diseases had significantly lower copy number of mtDNA. Higher mtDNA (highest quartile) was associated with a significantly lower risk of both solid tumors and other diseases, independent of age and sex. Receiver operating curve demonstrated that mtDNA levels could differentiate controls from patients with solid tumors and other diseases. Quantification of mtDNA by a well optimized ddPCR method showed that its depletion may be a hallmark of general illness and can be used to stratify healthy individuals from patients diagnosed with cancer and other chronic diseases.
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41
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Long X, Wang X, Chen Y, Guo X, Zhou F, Fan Y, Ge N, Guo M, Zhang Z, Dong G. Polymorphisms in POLG were associated with the prognosis and mtDNA content in hepatocellular carcinoma patients. Bull Cancer 2017; 104:500-507. [PMID: 28457473 DOI: 10.1016/j.bulcan.2017.02.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 02/16/2017] [Accepted: 02/20/2017] [Indexed: 11/27/2022]
Abstract
BACKGROUND POLG is a gene that codes for the catalytic subunit of the mitochondrial DNA polymerase, which is involved in the replication of mitochondrial DNA. Genetic variants in mitochondrial DNA polymerase-γ (POLG) have been associated with several malignancies. However, as an important metabolic tissue, association between genetic polymorphisms of POLG and the prognosis and mitochondrial DNA (mtDNA) content in hepatocellular carcinoma (HCC) remains unknown. Here we investigated the association between in POLG with the prognosis and mitochondrial DNA (mtDNA) content in hepatocellular carcinoma (HCC). METHODS Three nucleotide polymorphisms (SNPs) of rs1061316, rs2247233 and rs758130 in POLG were examined in 416 patients from two cohorts undergoing transcatheter arterial chemoembolization treatment. Leukocyte mtDNA content from 216 patients in cohort 2 was measured using a real-time PCR-based method. The association of SNPs with prognosis and of mtDNA content of patients was analyzed. RESULTS The rs758130 in POLG gene was significantly associated with the prognosis of patients in a dose-dependent manner. Moreover, GG genotype in rs1061316 showed significantly high mtDNA content, an indicator of better prognosis. CONCLUSIONS Our study for the first time demonstrates that rs1061316 and rs758130 in POLG is associated with the prognosis and leukocyte mtDNA content in HCC patients.
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Affiliation(s)
- Xiaoyu Long
- Fourth Military Medical University, Experimental Teaching Center of Basic Medicine, State Key Laboratory of Cancer Biology, Xi'an, China
| | - Xiaoyan Wang
- Fourth Military Medical University, Experimental Teaching Center of Basic Medicine, State Key Laboratory of Cancer Biology, Xi'an, China; Shaanxi Cancer Hospital, Department of Breast Cancer Center, Xi'an, China
| | - Yibing Chen
- Fourth Military Medical University, Experimental Teaching Center of Basic Medicine, State Key Laboratory of Cancer Biology, Xi'an, China
| | - Xu Guo
- Fourth Military Medical University, Experimental Teaching Center of Basic Medicine, State Key Laboratory of Cancer Biology, Xi'an, China
| | - Feng Zhou
- Fourth Military Medical University, Tangdu Hospital, Department of General Surgery, Xi'an, China; Xuzhou Medical University, Huaihai Hospital, Department of General Surgery, Xuzhou, Jiangsu, China
| | - Yongguo Fan
- Fourth Military Medical University, Tangdu Hospital, Department of General Surgery, Xi'an, China
| | - Naijian Ge
- Second Military Medical University, Eastern Hepatobiliary Surgery Hospital, Department of Radioactive Intervention, Shanghai, China
| | - Mei Guo
- PLA 451 Hospital, Xi'an, China
| | - Zhaohui Zhang
- Xuzhou Medical University, Huaihai Hospital, Department of General Surgery, Xuzhou, Jiangsu, China.
| | - Guanglong Dong
- The General Hospital of PLA, Department of General Surgery, Beijing, China.
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Moore A, Lan Q, Hofmann JN, Liu CS, Cheng WL, Lin TT, Berndt SI. A prospective study of mitochondrial DNA copy number and the risk of prostate cancer. Cancer Causes Control 2017; 28:529-538. [PMID: 28357528 DOI: 10.1007/s10552-017-0879-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 03/07/2017] [Indexed: 12/24/2022]
Abstract
PURPOSE Evidence suggests that mitochondrial DNA (mtDNA) copy number increases in response to DNA damage. Increased mtDNA copy number has been observed in prostate cancer (PCa) cells, suggesting a role in PCa development, but this association has not yet been investigated prospectively. METHODS We conducted a nested case-control study (793 cases and 790 controls) of men randomized to the screening arm of the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial (PLCO) to evaluate the association between pre-diagnosis mtDNA copy number, measured in peripheral blood leukocytes, and the risk of PCa. We used logistic regression to estimate odds ratios (OR) and 95% confidence intervals (CI) and polytomous logistic regression to analyze differences in associations by non-aggressive (Stage I/II AND Gleason grade < 8) or aggressive (Stage III/IV OR Gleason grade ≥ 8) PCa. RESULTS Although mtDNA copy number was not significantly associated with PCa risk overall (OR 1.23, 95% CI 0.97-1.55, p = 0.089), increasing mtDNA copy number was associated with an increased risk of non-aggressive PCa (OR 1.29, 95% CI 1.01-1.65, p = 0.044) compared to controls. No association was observed with aggressive PCa (OR 1.02, 95% CI 0.64-1.63, p = 0.933). Higher mtDNA copy number was also associated with increased PSA levels among controls (p = 0.014). CONCLUSIONS These results suggest that alterations in mtDNA copy number may reflect disruption of the normal prostate glandular architecture seen in early-stage disease, as opposed to reflecting the large number of tumor cells seen with advanced PCa.
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Affiliation(s)
- Amy Moore
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA.
| | - Qing Lan
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Jonathan N Hofmann
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Chin-San Liu
- Vascular and Genomic Research Center, Changhua Christian Hospital, 7F No. 235, Syuguang Rd., Changhua, 500, Taiwan
| | - Wen-Ling Cheng
- Vascular and Genomic Research Center, Changhua Christian Hospital, 7F No. 235, Syuguang Rd., Changhua, 500, Taiwan
| | - Ta-Tsung Lin
- Vascular and Genomic Research Center, Changhua Christian Hospital, 7F No. 235, Syuguang Rd., Changhua, 500, Taiwan
| | - Sonja I Berndt
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
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Kang MG, Kim YN, Lee JH, Szardenings M, Baek HJ, Kook H, Kim HR, Shin MG. Clinicopathological Implications of Mitochondrial Genome Alterations in Pediatric Acute Myeloid Leukemia. Ann Lab Med 2017; 36:101-10. [PMID: 26709256 PMCID: PMC4713842 DOI: 10.3343/alm.2016.36.2.101] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 08/21/2015] [Accepted: 11/10/2015] [Indexed: 01/25/2023] Open
Abstract
Background To the best of our knowledge, the association between pediatric AML and mitochondrial aberrations has not been studied. We investigated various mitochondrial aberrations in pediatric AML and evaluated their impact on clinical outcomes. Methods Sequencing, mitochondrial DNA (mtDNA) copy number determination, mtDNA 4,977-bp large deletion assessments, and gene scan analyses were performed on the bone marrow mononuclear cells of 55 pediatric AML patients and on the peripheral blood mononuclear cells of 55 normal controls. Changes in the mitochondrial mass, mitochondrial membrane potential, and intracellular reactive oxygen species (ROS) levels were also examined. Results mtDNA copy numbers were about two-fold higher in pediatric AML cells than in controls (P<0.0001). Furthermore, a close relationship was found between mtDNA copy number tertiles and the risk of pediatric AML. Intracellular ROS levels, mitochondrial mass, and mitochondrial membrane potentials were all elevated in pediatric AML. The frequency of the mtDNA 4,977-bp large deletion was significantly higher (P< 0.01) in pediatric AML cells, and pediatric AML patients harboring high amount of mtDNA 4,977-bp deletions showed shorter overall survival and event-free survival rates, albeit without statistical significance. Conclusions The present findings demonstrate an association between mitochondrial genome alterations and the risk of pediatric AML.
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Affiliation(s)
- Min-Gu Kang
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea.,Brain Korea 21 Plus Project, Chonnam National University Medical School, Gwangju, Korea
| | - Yu-Na Kim
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea.,Department of Pediatrics, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea
| | - Jun Hyung Lee
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea
| | - Michael Szardenings
- Department of Cell Therapy, Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany
| | - Hee-Jo Baek
- Department of Pediatrics, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea.,Environmental Health Center for Childhood Leukemia and Cancer, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea
| | - Hoon Kook
- Department of Pediatrics, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea.,Environmental Health Center for Childhood Leukemia and Cancer, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea
| | - Hye-Ran Kim
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea.,College of Korean Medicine, Dongshin University, Naju, Korea, Korea.
| | - Myung-Geun Shin
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea.,Environmental Health Center for Childhood Leukemia and Cancer, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea.,Brain Korea 21 Plus Project, Chonnam National University Medical School, Gwangju, Korea.
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Hu L, Yao X, Shen Y. Altered mitochondrial DNA copy number contributes to human cancer risk: evidence from an updated meta-analysis. Sci Rep 2016; 6:35859. [PMID: 27775013 PMCID: PMC5075889 DOI: 10.1038/srep35859] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 10/06/2016] [Indexed: 12/31/2022] Open
Abstract
Accumulating epidemiological evidence indicates that the quantitative changes in human mitochondrial DNA (mtDNA) copy number could affect the genetic susceptibility of malignancies in a tumor-specific manner, but the results are still elusive. To provide a more precise estimation on the association between mtDNA copy number and risk of diverse malignancies, a meta-analysis was conducted by calculating the pooled odds ratios (OR) and the 95% confidence intervals (95% CI). A total of 36 case-control studies involving 11,847 cases and 15,438 controls were finally included in the meta-analysis. Overall analysis of all studies suggested no significant association between mtDNA content and cancer risk (OR = 1.044, 95% CI = 0.866–1.260, P = 0.651). Subgroup analyses by cancer types showed an obvious positive association between mtDNA content and lymphoma and breast cancer (OR = 1.645, 95% CI = 1.117–2.421, P = 0.012; OR = 1.721, 95% CI = 1.130–2.622, P = 0.011, respectively), and a negative association for hepatic carcinoma. Stratified analyses by other confounding factors also found increased cancer risk in people with drinking addiction. Further analysis using studies of quartiles found that populations with the highest mtDNA content may be under more obvious risk of melanoma and that Western populations were more susceptible than Asians.
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Affiliation(s)
- Liwen Hu
- Department of Cardiothoracic Surgery, Jinling Hospital, School of Clinical Medicine, Nanjing University, Nanjing, Jiangsu Province, P. R. China
| | - Xinyue Yao
- Institute of Laboratory Medicine, Jinling Hospital, School of Clinical Medicine, Nanjing University, Nanjing, Jiangsu Province, P. R. China
| | - Yi Shen
- Department of Cardiothoracic Surgery, Jinling Hospital, School of Clinical Medicine, Nanjing University, Nanjing, Jiangsu Province, P. R. China
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45
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Adjusting MtDNA Quantification in Whole Blood for Peripheral Blood Platelet and Leukocyte Counts. PLoS One 2016; 11:e0163770. [PMID: 27736919 PMCID: PMC5063275 DOI: 10.1371/journal.pone.0163770] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 09/14/2016] [Indexed: 12/28/2022] Open
Abstract
Alterations of mitochondrial DNA copy number (mtDNAcn) in the blood (mitochondrial to nuclear DNA ratio) appear associated with several systemic diseases, including primary mitochondrial disorders, carcinogenesis, and hematologic diseases. Measuring mtDNAcn in DNA extracted from whole blood (WB) instead of from peripheral blood mononuclear cells or buffy coat may yield different results due to mitochondrial DNA present in platelets. The aim of this work is to quantify the contribution of platelets to mtDNAcn in whole blood [mtDNAcn(WB)] and to propose a correction formula to estimate leukocytes' mtDNAcn [mtDNAcn(L)] from mtDNAcn(WB). Blood samples from 10 healthy adults were combined with platelet-enriched plasma and saline solution to produce artificial blood preparations. Aliquots of each sample were combined with five different platelet concentrations. In 46 of these blood preparations, mtDNAcn was measured by qPCR. MtDNAcn(WB) increased 1.07 (95%CI 0.86, 1.29; p<0.001) per 1000 platelets present in the preparation. We proved that leukocyte count should also be taken into account as mtDNAcn(WB) was inversely associated with leukocyte count; it increased 1.10 (95%CI 0.95, 1.25, p<0.001) per unit increase of the ratio between platelet and leukocyte counts. If hematological measurements are available, subtracting 1.10 the platelets/leukocyte ratio from mtDNAcn(WB) may serve as an estimation for mtDNAcn(L). Both platelet and leukocyte counts in the sample are important sources of variation if comparing mtDNAcn among groups of patients when mtDNAcn is measured in DNA extracted from whole blood. Not taking the platelet/leukocyte ratio into account in whole blood measurements, may lead to overestimation and misclassification if interpreted as leukocytes' mtDNAcn.
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46
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Bao D, Ba Y, Zhou F, Zhao J, Yang Q, Ge N, Guo X, Wu Z, Zhang H, Yang H, Wan S, Xing J. Alterations of telomere length and mtDNA copy number are associated with overall survival in hepatocellular carcinoma patients treated with transarterial chemoembolization. Cancer Chemother Pharmacol 2016; 78:791-9. [PMID: 27558242 DOI: 10.1007/s00280-016-3128-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 08/04/2016] [Indexed: 12/28/2022]
Abstract
PURPOSE Increasing evidence suggests that alterations in mitochondrial DNA (mtDNA) copy number (mtDNAcn) and relative telomere length (RTL) may be implicated in the tumorigenesis of several malignancies. Alterations of both RTL and mtDNAcn are generally accepted as independent biomarkers for predicting risk and prognosis in various cancers. The aim of this study was to evaluate the prognostic value of combining leukocyte RTL with mtDNAcn (RTL-mtDNAcn) in hepatocellular carcinoma (HCC). METHODS RTL and mtDNAcn in peripheral blood leukocytes (PBLs) were measured using a real-time PCR-based method in a total of 250 HCC patients treated with transcatheter arterial chemoembolization (TACE). We evaluated the associations between RTL and/or mtDNAcn and HCC overall survival using Kaplan-Meier curve analysis and Cox proportional hazards regression model. RESULTS We found that patients with longer leukocyte RTL or lower mtDNAcn had shorter overall survival time. The univariate analysis (HR 1.63, 95 % CI 1.23-2.17, P = 7.7 × 10(-4)) and multivariate analysis (HR 1.78, 95 % CI 1.31-2.42, P = 2.4 × 10(-4)) indicated that longer leukocyte RTL was significantly associated with poorer OS in HCC patients. Kaplan-Meier curve analysis showed that patients with longer RTL had shorter overall survival time than those with shorter RTL (log-rank P = 0.001). Patients with lower mtDNA copy number was significantly associated with poorer OS by Cox proportional hazards model using both univariate (HR 1.60, 95 % CI 1.21-2.13, P = 0.001) and multivariate analyses (HR 1.77, 95 % CI 1.30-2.41, P = 2.8 × 10(-4)). Kaplan-Meier curve analysis showed that patients with lower mtDNA content had significantly shorter overall survival time than those with higher mtDNA content (log-rank P = 0.001). Furthermore, combination of leukocyte RTL and mtDNAcn significantly improved the efficacy of predicting HCC prognosis. Patients with longer RTL and lower mtDNAcn exhibited a significantly poorer overall survival in both the univariate analysis (HR 2.21, 95 % CI 1.52-3.22, P = 3.5 × 10(-5)) and multivariate analysis (HR 2.60, 95 % CI 1.73-3.90, P = 4.3 × 10(-6)). The effect on patient prognosis was more evident in patients with longer RTL and lower mtDNAcn than in those with shorter RTL and lower mtDNA (HR 2.11, 95 % CI 1.34-3.32, P = 0.001) or in those with longer RTL and higher mtDNA (HR 2.10, 95 % CI 1.34-3.27, P = 0.001). CONCLUSIONS Our data suggest that combination of leukocyte RTL-mtDNAcn may be a potential efficient prognostic marker for HCC patients receiving the TACE treatment.
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Affiliation(s)
- Dengke Bao
- Institute of Pharmacy, Pharmaceutical College of Henan University, Kaifeng, 475004, Henan, China
| | - Yanna Ba
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shanxi, China
| | - Feng Zhou
- Department of General Surgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710032, Shanxi, China
| | - Jing Zhao
- Institute of Pharmacy, Pharmaceutical College of Henan University, Kaifeng, 475004, Henan, China
| | - Qi Yang
- Institute of Pharmacy, Pharmaceutical College of Henan University, Kaifeng, 475004, Henan, China
| | - Naijian Ge
- Department of Radioactive Intervention, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai, China
| | - Xu Guo
- State Key Laboratory of Cancer Biology, Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, Shanxi, China
| | - Zhenbiao Wu
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, Shanxi, China
| | - Hongxin Zhang
- Department of Pain Treatment, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, Shanxi, China
| | - Hushan Yang
- Division of Population Science, Department of Medical Oncology, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Shaogui Wan
- Institute of Pharmacy, Pharmaceutical College of Henan University, Kaifeng, 475004, Henan, China.
| | - Jinliang Xing
- State Key Laboratory of Cancer Biology, Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, Shanxi, China.
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Shen J, Song R, Lu Z, Zhao H. Mitochondrial DNA copy number in whole blood and glioma risk: A case control study. Mol Carcinog 2016; 55:2089-2094. [PMID: 26756431 DOI: 10.1002/mc.22453] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 12/03/2015] [Accepted: 12/15/2015] [Indexed: 11/12/2022]
Abstract
Alterations in mitochondrial DNA (mtDNA) copy number are observed in human gliomas. However, whether variations in mtDNA copy number in whole blood play any role in glioma carcinogenesis is still largely unknown. In current study with 395 glioma patients and 425 healthy controls, we intended to investigate the association between mtDNA copy number in whole blood and glioma risk. Overall, we found that levels of mtDNA copy number were significantly higher in glioma cases than healthy controls (mean: 1.48 vs. 1.32, P < 0.01). In both cases and controls, levels of mtDNA copy number were inversely correlated with age (P < 0.01, respectively). And in cases, newly diagnosed, glioblastoma (GBM), and high grade glioma patients had significantly lower mtDNA copy number than their counterparts (P = 0.02, P < 0.01, and P = 0.04, respectively). In the multivariate analysis, elevated mtDNA copy number levels were associated with a 1.63-fold increased risk of glioma (adjusted odds ratio (OR) = 1.63, 95% confidence interval (CI) = 1.23-2.14). In further quartile analysis, study subjects who had highest levels of mtNDA copy number had 1.75-fold increased risk of gliomas (adjOR = 1.75, 95%CI = 1.18-2.61). In brief, our findings support the role of mtDNA copy number in the glioma carcinogenesis. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Jie Shen
- Department of Epidemiology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Renduo Song
- Department of Epidemiology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Zhimin Lu
- Department of Neuro-Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Hua Zhao
- Department of Epidemiology, University of Texas MD Anderson Cancer Center, Houston, Texas
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48
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Rozovski U, Hazan-Halevy I, Barzilai M, Keating MJ, Estrov Z. Metabolism pathways in chronic lymphocytic leukemia. Leuk Lymphoma 2015; 57:758-65. [PMID: 26643954 DOI: 10.3109/10428194.2015.1106533] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Alterations in chronic lymphocytic leukemia (CLL) cell metabolism have been studied by several investigators. Unlike normal B lymphocytes or other leukemia cells, CLL cells, like adipocytes, store lipids and utilize free fatty acids (FFA) to produce chemical energy. None of the recently identified mutations in CLL directly affects metabolic pathways, suggesting that genetic alterations do not directly contribute to CLL cells' metabolic reprogramming. Conversely, recent data suggest that activation of STAT3 or downregulation of microRNA-125 levels plays a crucial role in the utilization of FFA to meet the CLL cells' metabolic needs. STAT3, known to be constitutively activated in CLL, increases the levels of lipoprotein lipase (LPL) that mediates lipoprotein uptake and shifts the CLL cells' metabolism towards utilization of FFA. Herein, we review the evidence for altered lipid metabolism, increased mitochondrial activity and formation of reactive oxygen species (ROS) in CLL cells, and discuss the possible therapeutic strategies to inhibit lipid metabolism pathways in patient with CLL.
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Affiliation(s)
- Uri Rozovski
- a Division of Hematology , Davidoff Cancer Center, Rabin Medical Center , Petach Tikva , Israel ;,b The Sackler Faculty of Medicine, Tel Aviv University , Tel Aviv , Israel
| | - Inbal Hazan-Halevy
- c Department of Cell Research and Immunology , George S. Wise Faculty of Life Sciences, The Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv , Israel
| | - Merav Barzilai
- b The Sackler Faculty of Medicine, Tel Aviv University , Tel Aviv , Israel ;,d Department of Hematology and Bone Marrow Transplantation , Tel-Aviv Sourasky Medical Center , Tel Aviv , Israel
| | - Michael J Keating
- e Department of Leukemia , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
| | - Zeev Estrov
- e Department of Leukemia , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
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Hashad DI, Elyamany AS, Salem PE. Mitochondrial DNA Copy Number in Egyptian Patients with Hepatitis C Virus-Related Hepatocellular Carcinoma. Genet Test Mol Biomarkers 2015; 19:604-9. [PMID: 26447820 DOI: 10.1089/gtmb.2015.0132] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
AIM To assess the use of mitochondrial DNA (mtDNA) content as a noninvasive molecular biomarker in hepatitis C virus-related hepatocellular carcinoma (HCV-HCC). MATERIALS AND METHODS A total of 135 participants were enrolled in the study. Equal numbers of subjects were enrolled in each of three clinically defined groups: those with HCV-related cirrhosis (HCV-cirrhosis), those with HCV-HCC, and a control group of age- and sex-matched healthy volunteers with no evidence of liver disease. mtDNA concentrations were determined using a quantitative real-time polymerase chain reaction (PCR) technique. RESULTS mtDNA content was lowest among the HCV-HCC cases. No statistically significant difference was observed between the group of HCV-cirrhosis and the control group as regards mtDNA level. HCC patients with multicentric hepatic lesions had significantly lower mtDNA content than HCC patients with less advanced disease. When a receiver operating characteristic curve analysis was used, a cutoff of 34 was assigned for mtDNA content to distinguish between HCV-HCC and HCV-cirrhosis patients who are not yet complicated by malignancy. Lower mtDNA content was associated with HCC risk when using either or both healthy controls and HCV-cirrhosis groups for reference. CONCLUSIONS mtDNA content analysis could serve as a noninvasive molecular biomarker that reflects tumor burden in HCV-HCC cases and could be used as a predictor of HCC risk in patients of HCV-cirrhosis. In addition, the nonsignificant difference of mtDNA level between HCV-cirrhosis patients and healthy controls could eliminate the gray zone created by the use of alpha-fetoprotein in some cirrhotic patients.
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Affiliation(s)
- Doaa I Hashad
- 1 Clinical Pathology Department, Alexandria University , Alexandria, Egypt
| | - Amany S Elyamany
- 2 Internal Medicine Department, Faculty of Medicine, Alexandria University , Alexandria, Egypt
| | - Perihan E Salem
- 2 Internal Medicine Department, Faculty of Medicine, Alexandria University , Alexandria, Egypt
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50
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Bassig BA, Friesen MC, Vermeulen R, Shu XO, Purdue MP, Stewart PA, Xiang YB, Chow WH, Zheng T, Ji BT, Yang G, Linet MS, Hu W, Zhang H, Zheng W, Gao YT, Rothman N, Lan Q. Occupational Exposure to Benzene and Non-Hodgkin Lymphoma in a Population-Based Cohort: The Shanghai Women's Health Study. ENVIRONMENTAL HEALTH PERSPECTIVES 2015; 123:971-7. [PMID: 25748391 PMCID: PMC4590744 DOI: 10.1289/ehp.1408307] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 03/04/2015] [Indexed: 05/15/2023]
Abstract
BACKGROUND The association between benzene exposure and non-Hodgkin lymphoma (NHL) has been the subject of debate as a result of inconsistent epidemiologic evidence. An International Agency for Research on Cancer (IARC) working group evaluated benzene in 2009 and noted evidence for a positive association between benzene exposure and NHL risk. OBJECTIVE We evaluated the association between occupational benzene exposure and NHL among 73,087 women enrolled in the prospective population-based Shanghai Women's Health Study. METHODS Benzene exposure estimates were derived using a previously developed exposure assessment framework that combined ordinal job-exposure matrix intensity ratings with quantitative benzene exposure measurements from an inspection database of Shanghai factories collected between 1954 and 2000. Associations between benzene exposure metrics and NHL (n = 102 cases) were assessed using Cox proportional hazard models, with study follow-up occurring from December 1996 through December 2009. RESULTS Women ever exposed to benzene had a significantly higher risk of NHL [hazard ratio (HR) = 1.87, 95% CI: 1.19, 2.96]. Compared with unexposed women, significant trends in NHL risk were observed for increasing years of benzene exposure (p(trend) = 0.006) and increasing cumulative exposure levels (p(trend) = 0.005), with the highest duration and cumulative exposure tertiles having a significantly higher association with NHL (HR = 2.07, 95% CI: 1.07, 4.01 and HR = 2.16, 95% CI: 1.17, 3.98, respectively). CONCLUSIONS Our findings, using a population-based prospective cohort of women with diverse occupational histories, provide additional evidence that occupational exposure to benzene is associated with NHL risk.
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Affiliation(s)
- Bryan A Bassig
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute (NCI), National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Bethesda, Maryland, USA
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