1
|
Chiaratti MR, Chinnery PF. Modulating mitochondrial DNA mutations: factors shaping heteroplasmy in the germ line and somatic cells. Pharmacol Res 2022; 185:106466. [PMID: 36174964 DOI: 10.1016/j.phrs.2022.106466] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/21/2022] [Accepted: 09/23/2022] [Indexed: 11/30/2022]
Abstract
Until recently it was thought that most humans only harbor one type of mitochondrial DNA (mtDNA), however, deep sequencing and single-cell analysis has shown the converse - that mixed populations of mtDNA (heteroplasmy) are the norm. This is important because heteroplasmy levels can change dramatically during transmission in the female germ line, leading to high levels causing severe mitochondrial diseases. There is also emerging evidence that low level mtDNA mutations contribute to common late onset diseases such as neurodegenerative disorders and cardiometabolic diseases because the inherited mutation levels can change within developing organs and non-dividing cells over time. Initial predictions suggested that the segregation of mtDNA heteroplasmy was largely stochastic, with an equal tendency for levels to increase or decrease. However, transgenic animal work and single-cell analysis have shown this not to be the case during germ-line transmission and in somatic tissues during life. Mutation levels in specific mtDNA regions can increase or decrease in different contexts and the underlying molecular mechanisms are starting to be unraveled. In this review we provide a synthesis of recent literature on the mechanisms of selection for and against mtDNA variants. We identify the most pertinent gaps in our understanding and suggest ways these could be addressed using state of the art techniques.
Collapse
Affiliation(s)
- Marcos R Chiaratti
- Departamento de Genética e Evolução, Centro de Ciências Biológicas e da Saúde, Universidade Federal de São Carlos, São Carlos, Brazil.
| | - Patrick F Chinnery
- Department of Clinical Neurosciences, School of Clinical Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK; Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK.
| |
Collapse
|
2
|
Wan Y, Finkel T. The mitochondria regulation of stem cell aging. Mech Ageing Dev 2020; 191:111334. [PMID: 32818514 PMCID: PMC7541753 DOI: 10.1016/j.mad.2020.111334] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 08/09/2020] [Accepted: 08/11/2020] [Indexed: 01/07/2023]
Abstract
Mitochondrial dysfunction and stem cell exhaustion are among the nine separate hallmarks of aging. Emerging evidence however suggests that mitochondrial activity can have a profound influence on the self-renewal and function of stem cells, thus mechanistically linking mitochondrial function and stem cell decline. In this review, we discuss how accumulation of mtDNA mutations or alterations in mitochondrial dynamics, turnover, and signaling can modulate age-dependent stem cell function. Finally, we also describe how mitochondrial substrate utilization influences stem and progenitor activity. Together, this growing body of evidence suggests that modulation of mitochondrial activity might provide a strategy to slow or reverse age-dependent stem cell decline, and potentially, slow or reverse human aging.
Collapse
Affiliation(s)
- Yong Wan
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh/UPMC, USA; Aging Institute, University of Pittsburgh/UPMC, Pittsburgh, PA 15219, USA
| | - Toren Finkel
- Aging Institute, University of Pittsburgh/UPMC, Pittsburgh, PA 15219, USA; Division of Cardiology, Department of Medicine, University of Pittsburgh/UPMC, USA.
| |
Collapse
|
3
|
Su T, Grady JP, Afshar S, McDonald SAC, Taylor RW, Turnbull DM, Greaves LC. Inherited pathogenic mitochondrial DNA mutations and gastrointestinal stem cell populations. J Pathol 2018; 246:427-432. [PMID: 30146801 PMCID: PMC6282723 DOI: 10.1002/path.5156] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/02/2018] [Accepted: 08/12/2018] [Indexed: 01/07/2023]
Abstract
Inherited mitochondrial DNA (mtDNA) mutations cause mitochondrial disease, but mtDNA mutations also occur somatically and accumulate during ageing. Studies have shown that the mutation load of some inherited mtDNA mutations decreases over time in blood, suggesting selection against the mutation. However, it is unknown whether such selection occurs in other mitotic tissues, and where it occurs within the tissue. Gastrointestinal epithelium is a canonical mitotic tissue rapidly renewed by stem cells. Intestinal crypts (epithelium) undergo monoclonal conversion with a single stem cell taking over the niche and producing progeny. We show: (1) that there is a significantly lower mtDNA mutation load in the mitotic epithelium of the gastrointestinal tract when compared to the smooth muscle in the same tissue in patients with the pathogenic m.3243A>G and m.8344A>G mutations; (2) that there is considerable variation seen in individual crypts, suggesting changes in the stem cell population; (3) that this lower mutation load is reflected in the absence of a defect in oxidative phosphorylation in the epithelium. This suggests that there is selection against inherited mtDNA mutations in the gastrointestinal stem cells that is in marked contrast to the somatic mtDNA mutations that accumulate with age in epithelial stem cells leading to a biochemical defect. © 2018 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
Collapse
Affiliation(s)
- Tianhong Su
- Wellcome Centre for Mitochondrial ResearchInstitute of Neuroscience, Newcastle UniversityNewcastle upon TyneUK
| | - John P Grady
- Wellcome Centre for Mitochondrial ResearchInstitute of Neuroscience, Newcastle UniversityNewcastle upon TyneUK
| | - Sorena Afshar
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Campus for Ageing and VitalityNewcastle upon TyneUK
| | - Stuart AC McDonald
- Centre for Tumour Biology, Barts Cancer Institute, Queen Mary University of LondonLondonUK
| | - Robert W Taylor
- Wellcome Centre for Mitochondrial ResearchInstitute of Neuroscience, Newcastle UniversityNewcastle upon TyneUK
| | - Doug M Turnbull
- Wellcome Centre for Mitochondrial ResearchInstitute of Neuroscience, Newcastle UniversityNewcastle upon TyneUK
- LLHW Centre for Ageing and Vitality, Newcastle University Institute for Ageing, The Medical SchoolNewcastle upon TyneUK
| | - Laura C Greaves
- Wellcome Centre for Mitochondrial ResearchInstitute of Neuroscience, Newcastle UniversityNewcastle upon TyneUK
- LLHW Centre for Ageing and Vitality, Newcastle University Institute for Ageing, The Medical SchoolNewcastle upon TyneUK
| |
Collapse
|
4
|
Roles of Mitochondrial DNA Mutations in Stem Cell Ageing. Genes (Basel) 2018; 9:genes9040182. [PMID: 29584704 PMCID: PMC5924524 DOI: 10.3390/genes9040182] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/22/2018] [Accepted: 03/26/2018] [Indexed: 12/29/2022] Open
Abstract
Mitochondrial DNA (mtDNA) mutations accumulate in somatic stem cells during ageing and cause mitochondrial dysfunction. In this review, we summarize the studies that link mtDNA mutations to stem cell ageing. We discuss the age-related behaviours of the somatic mtDNA mutations in stem cell populations and how they potentially contribute to stem cell ageing by altering mitochondrial properties in humans and in mtDNA-mutator mice. We also draw attention to the diverse fates of the mtDNA mutations with different origins during ageing, with potential selective pressures on the germline inherited but not the somatic mtDNA mutations.
Collapse
|
5
|
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.
Collapse
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.
| |
Collapse
|
6
|
Yao YG, Kajigaya S, Young NS. Mitochondrial DNA mutations in single human blood cells. Mutat Res 2015; 779:68-77. [PMID: 26149767 DOI: 10.1016/j.mrfmmm.2015.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 06/16/2015] [Accepted: 06/18/2015] [Indexed: 01/07/2023]
Abstract
Determination mitochondrial DNA (mtDNA) sequences from extremely small amounts of DNA extracted from tissue of limited amounts and/or degraded samples is frequently employed in medical, forensic, and anthropologic studies. Polymerase chain reaction (PCR) amplification followed by DNA cloning is a routine method, especially to examine heteroplasmy of mtDNA mutations. In this review, we compare the mtDNA mutation patterns detected by three different sequencing strategies. Cloning and sequencing methods that are based on PCR amplification of DNA extracted from either single cells or pooled cells yield a high frequency of mutations, partly due to the artifacts introduced by PCR and/or the DNA cloning process. Direct sequencing of PCR product which has been amplified from DNA in individual cells is able to detect the low levels of mtDNA mutations present within a cell. We further summarize the findings in our recent studies that utilized this single cell method to assay mtDNA mutation patterns in different human blood cells. Our data show that many somatic mutations observed in the end-stage differentiated cells are found in hematopoietic stem cells (HSCs) and progenitors within the CD34(+) cell compartment. Accumulation of mtDNA variations in the individual CD34+ cells is affected by both aging and family genetic background. Granulocytes harbor higher numbers of mutations compared with the other cells, such as CD34(+) cells and lymphocytes. Serial assessment of mtDNA mutations in a population of single CD34(+) cells obtained from the same donor over time suggests stability of some somatic mutations. CD34(+) cell clones from a donor marked by specific mtDNA somatic mutations can be found in the recipient after transplantation. The significance of these findings is discussed in terms of the lineage tracing of HSCs, aging effect on accumulation of mtDNA mutations and the usage of mtDNA sequence in forensic identification.
Collapse
Affiliation(s)
- Yong-Gang Yao
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China.
| | - Sachiko Kajigaya
- Hematology Branch, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD 20892, USA
| | - Neal S Young
- Hematology Branch, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD 20892, USA
| |
Collapse
|
7
|
Won EJ, Kim HR, Park RY, Choi SY, Shin JH, Suh SP, Ryang DW, Szardenings M, Shin MG. Direct confirmation of quiescence of CD34+CD38- leukemia stem cell populations using single cell culture, their molecular signature and clinicopathological implications. BMC Cancer 2015; 15:217. [PMID: 25881148 PMCID: PMC4391681 DOI: 10.1186/s12885-015-1233-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 03/20/2015] [Indexed: 02/07/2023] Open
Abstract
Background The proliferating activity of a single leukemia stem cell and the molecular mechanisms for their quiescent property remain unknown, and also their prognostic value remains a matter of debate. Therefore, this study aimed to demonstrate the quiescence property and molecular signature of leukemia stem cell and their clinicopathological implications. Methods Single cell sorting and culture were performed in the various sets of hematopoietic stem cells including CD34+CD38- acute myeloid leukemia (AML) cell population (ASCs) from a total of 60 patients with AML, and 11 healthy controls. Their quiescence related-molecular signatures and clinicopathological parameters were evaluated in AML patients. Results Single cell plating efficiency of ASCs was significantly lower (8.6%) than those of normal hematopoietic stem cells i.e.: cord blood, 79.0%; peripheral blood, 45.3%; and bone marrow stem cell, 31.1%. Members of the TGFβ super-family signaling pathway were most significantly decreased; as well as members of the Wnt, Notch, pluripotency maintenance and hedgehog pathways, compared with non ASC populations. mtDNA copy number of ASCs was significantly lower than that of corresponding other cell populations. However, our data couldn’t support the prognostic value of the ASCs in AML. Conclusions ASCs showed remarkable lower plating efficiency and slower dividing properties at the single cell level. This quiescence is represented as a marked decrease in the mtDNA copy number and also linked with down-regulation of genes in various molecular pathways. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1233-x) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Eun Jeong Won
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, South Korea.
| | - Hye-Ran Kim
- College of Korean Medicine, Dongshin University, Naju, South Korea.
| | - Ra-Young Park
- Brain Korea 21 Project, Center for Biomedical Human Resources, Chonnam National University, Gwangju, South Korea.
| | - Seok-Yong Choi
- Brain Korea 21 Project, Center for Biomedical Human Resources, Chonnam National University, Gwangju, South Korea.
| | - Jong Hee Shin
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, South Korea.
| | - Soon-Pal Suh
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, South Korea.
| | - Dong-Wook Ryang
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, South Korea.
| | - Michael Szardenings
- Department of Cell Therapy, Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany.
| | - Myung-Geun Shin
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, South Korea. .,Brain Korea 21 Project, Center for Biomedical Human Resources, Chonnam National University, Gwangju, South Korea. .,Environment Health Center for Childhood Leukemia and Cancer, Chonnam National University Hwasun Hospital, Hwasun, South Korea.
| |
Collapse
|
8
|
Venderbosch S, van Vliet S, Craenmehr MHC, Simmer F, de Haan AFJ, Punt CJA, Koopman M, Nagtegaal ID. Mitochondrial microsatellite instability in patients with metastatic colorectal cancer. Virchows Arch 2015; 466:495-502. [PMID: 25697538 PMCID: PMC4422840 DOI: 10.1007/s00428-015-1733-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 02/02/2015] [Indexed: 12/20/2022]
Abstract
Mitochondrial microsatellite instability (mtMSI), a change in length in mtDNA microsatellite sequences between normal and tumor tissue, has been described as a frequent occurrence in colorectal cancer (CRC). We evaluated the prevalence and prognostic value of mtMSI and its relation to nuclear microsatellite instability (MSI) in patients with metastatic CRC (mCRC). At six loci (D310, D514, D16184, ND1, ND5, and COX1), the mitochondrial DNA sequence was analyzed in normal and tumor tissue, and the mtMSI status was determined. We evaluated the prevalence and outcome in terms of overall survival (OS) in 83 CRC patients with a MSI tumor (including 39 patients with Lynch syndrome) and in 99 mCRC patients with a microsatellite stable (MSS) tumor. A meta-analysis was performed to compare our findings with existing data. mtMSI at the D-loop region was found in 54.4 % (99 out of 182) of all patients. Prevalence of mtMSI was most pronounced at the D310 locus (50.5 %). Prevalence of mtMSI at the D-loop region was not different among patients with MSI compared to MSS tumors. There was no effect of mtMSI on prognosis in patients with MSI or MSS tumors. Prevalence of mtMSI was high in mCRC patients with both MSI and MSS tumors, but there was no correlation with prognosis. mtMSI was particularly present at the D310 locus.
Collapse
Affiliation(s)
- S. Venderbosch
- Department of Pathology, Radboud University Medical Center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
- Department of Medical Oncology, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - S. van Vliet
- Department of Pathology, Radboud University Medical Center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| | - M. H. C. Craenmehr
- Department of Pathology, Radboud University Medical Center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| | - F. Simmer
- Department of Pathology, Radboud University Medical Center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| | - A. F. J. de Haan
- Department for Health Evidence, Section Biostatistics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - C. J. A. Punt
- Department of Medical Oncology, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - M. Koopman
- Department of Medical Oncology, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - I. D. Nagtegaal
- Department of Pathology, Radboud University Medical Center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| |
Collapse
|
9
|
Kim HR, Won SJ, Fabian C, Kang MG, Szardenings M, Shin MG. Mitochondrial DNA aberrations and pathophysiological implications in hematopoietic diseases, chronic inflammatory diseases, and cancers. Ann Lab Med 2014; 35:1-14. [PMID: 25553274 PMCID: PMC4272938 DOI: 10.3343/alm.2015.35.1.1] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 08/07/2014] [Accepted: 11/11/2014] [Indexed: 12/25/2022] Open
Abstract
Mitochondria are important intracellular organelles that produce energy for cellular development, differentiation, and growth. Mitochondrial DNA (mtDNA) presents a 10- to 20-fold higher susceptibility to genetic mutations owing to the lack of introns and histone proteins. The mtDNA repair system is relatively inefficient, rendering it vulnerable to reactive oxygen species (ROS) produced during ATP synthesis within the mitochondria, which can then target the mtDNA. Under conditions of chronic inflammation and excess stress, increased ROS production can overwhelm the antioxidant system, resulting in mtDNA damage. This paper reviews recent literature describing the pathophysiological implications of oxidative stress, mitochondrial dysfunction, and mitochondrial genome aberrations in aging hematopoietic stem cells, bone marrow failure syndromes, hematological malignancies, solid organ cancers, chronic inflammatory diseases, and other diseases caused by exposure to environmental hazards.
Collapse
Affiliation(s)
- Hye-Ran Kim
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea. ; Brain Korea 21 Project, Center for Biomedical Human Resources, Chonnam National University, Gwangju, Korea
| | - Stephanie Jane Won
- Department of Integrative Biology, University of California, Berkeley, CA, USA
| | - Claire Fabian
- Department of Cell Therapy, Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany
| | - Min-Gu Kang
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea. ; Brain Korea 21 Project, Center for Biomedical Human Resources, Chonnam National University, Gwangju, Korea
| | - Michael Szardenings
- Department of Cell Therapy, Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany
| | - Myung-Geun Shin
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, Korea. ; Brain Korea 21 Project, Center for Biomedical Human Resources, Chonnam National University, Gwangju, Korea. ; Environment Health Center for Childhood Leukemia and Cancer, Chonnam National University Hwasun Hospital, Hwasun, Korea
| |
Collapse
|
10
|
Greaves LC, Nooteboom M, Elson JL, Tuppen HAL, Taylor GA, Commane DM, Arasaradnam RP, Khrapko K, Taylor RW, Kirkwood TBL, Mathers JC, Turnbull DM. Clonal expansion of early to mid-life mitochondrial DNA point mutations drives mitochondrial dysfunction during human ageing. PLoS Genet 2014; 10:e1004620. [PMID: 25232829 PMCID: PMC4169240 DOI: 10.1371/journal.pgen.1004620] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 07/21/2014] [Indexed: 01/03/2023] Open
Abstract
Age-related decline in the integrity of mitochondria is an important contributor to the human ageing process. In a number of ageing stem cell populations, this decline in mitochondrial function is due to clonal expansion of individual mitochondrial DNA (mtDNA) point mutations within single cells. However the dynamics of this process and when these mtDNA mutations occur initially are poorly understood. Using human colorectal epithelium as an exemplar tissue with a well-defined stem cell population, we analysed samples from 207 healthy participants aged 17-78 years using a combination of techniques (Random Mutation Capture, Next Generation Sequencing and mitochondrial enzyme histochemistry), and show that: 1) non-pathogenic mtDNA mutations are present from early embryogenesis or may be transmitted through the germline, whereas pathogenic mtDNA mutations are detected in the somatic cells, providing evidence for purifying selection in humans, 2) pathogenic mtDNA mutations are present from early adulthood (<20 years of age), at both low levels and as clonal expansions, 3) low level mtDNA mutation frequency does not change significantly with age, suggesting that mtDNA mutation rate does not increase significantly with age, and 4) clonally expanded mtDNA mutations increase dramatically with age. These data confirm that clonal expansion of mtDNA mutations, some of which are generated very early in life, is the major driving force behind the mitochondrial dysfunction associated with ageing of the human colorectal epithelium.
Collapse
Affiliation(s)
- Laura C. Greaves
- Newcastle University Centre for Brain Ageing and Vitality, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
- Wellcome Trust Centre for Mitochondrial Research, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
- * E-mail:
| | - Marco Nooteboom
- Wellcome Trust Centre for Mitochondrial Research, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Joanna L. Elson
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
- Centre for Human Metabolomics, North-West University, Potchefstroom, South Africa
| | - Helen A. L. Tuppen
- Wellcome Trust Centre for Mitochondrial Research, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Geoffrey A. Taylor
- Wellcome Trust Centre for Mitochondrial Research, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Daniel M. Commane
- Human Nutrition Research Centre, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Ramesh P. Arasaradnam
- Human Nutrition Research Centre, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Konstantin Khrapko
- Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Robert W. Taylor
- Wellcome Trust Centre for Mitochondrial Research, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Thomas B. L. Kirkwood
- Institute for Ageing and Health, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, United Kingdom
| | - John C. Mathers
- Newcastle University Centre for Brain Ageing and Vitality, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
- Human Nutrition Research Centre, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Douglass M. Turnbull
- Newcastle University Centre for Brain Ageing and Vitality, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
- Wellcome Trust Centre for Mitochondrial Research, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom
| |
Collapse
|
11
|
Affiliation(s)
- Myung Geun Shin
- Department of Laboratory Medicine, Medical School, Chonnam National University, Gwangju, Korea
- Center for Creative Biomedical Scientists, Chonnam National University, Gwangju, Korea
| |
Collapse
|
12
|
Yao YG, Kajigaya S, Samsel L, McCoy JP, Torelli G, Young NS. Apparent mtDNA sequence heterogeneity in single human blood CD34+ cells is markedly affected by storage and transport. Mutat Res 2013; 751-752:36-41. [PMID: 24044942 DOI: 10.1016/j.mrfmmm.2013.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 09/01/2013] [Accepted: 09/05/2013] [Indexed: 11/30/2022]
Abstract
Single CD34(+) cells from adult human peripheral blood show mtDNA sequence heterogeneity. In this study, we compared mtDNA sequence variation in single CD34(+) cells from peripheral blood (PB) mononuclear cells (MNCs) from the same donors but under different conditions of storage and transport: group I, MNCs from heparinized PB that inadvertently required six days to be transported to the testing laboratory; group II, MNCs which were isolated from PB within a day of phlebotomy and frozen prior to transportation and storage. We observed more cell death for MNCs of group I than group II. Concordantly, group I CD34(+) cells had a very low potential for hematopoietic colony formation in vitro compared with group II cells. CD34(+) cells of group II showed an unexpectedly higher level of mtDNA sequence heterogeneity than was present in group I cells. These observations suggest that reduced mtDNA sequence heterogeneity in single CD34(+) cells of group I was likely due to elimination of cells harboring mutations. CD34(+) cells that survive stress ex vivo may be more enriched in quiescent primitive hematopoietic stem cells, with fewer mtDNA mutations than are present in committed progenitors. Technically, attention is required to conditions of preparation of human blood samples for single cell mtDNA analysis.
Collapse
Affiliation(s)
- Yong-Gang Yao
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China; Hematology Branch and Flow Cytometry Core Facility, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | | | | | | | | | | |
Collapse
|
13
|
Won EJ, Kim HR, Kim HY, Kook H, Kim HJ, Shin JH, Suh SP, Ryang DW, Shin MG. Diagnostic and Prognostic Value of Mitochondrial DNA Minisatellites after Stem Cell Transplantation. Biol Blood Marrow Transplant 2013; 19:918-24. [DOI: 10.1016/j.bbmt.2013.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 03/05/2013] [Indexed: 11/16/2022]
|
14
|
Lim SW, Kim HR, Kim HY, Huh JW, Kim YJ, Shin JH, Suh SP, Ryang DW, Kim HR, Shin MG. High-frequency minisatellite instability of the mitochondrial genome in colorectal cancer tissue associated with clinicopathological values. Int J Cancer 2012; 131:1332-41. [PMID: 22120612 DOI: 10.1002/ijc.27375] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Revised: 11/07/2011] [Accepted: 11/10/2011] [Indexed: 11/09/2022]
Abstract
Most studies of mitochondrial DNA (mtDNA) mutations in colorectal cancer have used case-control and case-database comparisons without searching their clinical relevance. This study was to investigate colorectal cancer tissue-specific mtDNA mutations from 54 matched colorectal cancer and adjacent normal tissues and then to evaluate their clinical values. This study focused on analyzing control region including mtDNA minisatellites and coding regions. Cancer tissue-specific mtDNA mutations were found in over half of the patients (59%). The patterns of mtDNA mutations were substitution only (13%), mtDNA minisatellite instability (mtMSI) (20%) and both mutations combined (26%). mtMSI in colorectal cancer was mainly occurred in the 303 polyC (35%) and 16184 poly C (19%) minisatellite. mtDNA copy number and hydrogen peroxide level were significantly increased in colorectal cancer tissue. The amount of mtDNA large deletions was significantly decreased in colorectal cancer tissue compared with those from matched normal mucosa (p = 0.03). The activity of the mitochondrial respiratory chain enzyme complexes I, II and III in colorectal cancer tissues was impaired. mtDNA haplogroup B4 might be closely associated with colorectal cancer risk. The patient group harboring cancer tissue-specific mtDNA mutations showed larger tumor sizes (p = 0.005) and more advanced TNM stages (p = 0.002). Thus, mtDNA mutations in colorectal cancer might be implicated in risk factors that induce poor outcomes and tumorigenesis.
Collapse
Affiliation(s)
- Sang Woo Lim
- Department of Surgery, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Yen HC, Hsu WC, Lin CL, Chen GW, Huang YH. Advantages and considerations in the confirmation of mitochondrial DNA mutations by denaturing HPLC and pyrosequencing. Ann N Y Acad Sci 2010; 1201:13-20. [DOI: 10.1111/j.1749-6632.2010.05626.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
16
|
Nooteboom M, Johnson R, Taylor RW, Wright NA, Lightowlers RN, Kirkwood TBL, Mathers JC, Turnbull DM, Greaves LC. Age-associated mitochondrial DNA mutations lead to small but significant changes in cell proliferation and apoptosis in human colonic crypts. Aging Cell 2010; 9:96-9. [PMID: 19878146 PMCID: PMC2816353 DOI: 10.1111/j.1474-9726.2009.00531.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Mitochondrial DNA (mtDNA) mutations are a cause of human disease and are proposed to have a role in human aging. Clonally expanded mtDNA point mutations have been detected in replicating tissues and have been shown to cause respiratory chain (RC) defects. The effect of these mutations on other cellular functions has not been established. Here, we investigate the consequences of RC deficiency on human colonic epithelial stem cells and their progeny in elderly individuals. We show for the first time in aging human tissue that RC deficiency attenuates cell proliferation and increases apoptosis in the progeny of RC deficient stem cells, leading to decreased crypt cell population.
Collapse
Affiliation(s)
- Marco Nooteboom
- Mitochondrial Research Group, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Wulfert M, Küpper AC, Tapprich C, Bottomley SS, Bowen D, Germing U, Haas R, Gattermann N. Analysis of mitochondrial DNA in 104 patients with myelodysplastic syndromes. Exp Hematol 2008; 36:577-86. [PMID: 18439489 DOI: 10.1016/j.exphem.2008.01.004] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2007] [Revised: 01/15/2008] [Accepted: 01/16/2008] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine the frequency and spectrum of somatic mutations of mitochondrial DNA (mtDNA) in bone marrow of patients with myelodysplastic syndrome (MDS). MATERIALS AND METHODS Analysis included 104 patients with MDS (24 refractory anemia, 32 refractory anemia with ringed sideroblasts, 34 refractory anemia with excess of blasts, 7 refractory anemia with excess of blasts in transformation to acute leukemia, and 7 chronic myelo-monocytic leukemia), 3 patients with acute myeloid leukemia from MDS, and 36 patients with myeloproliferative disease (23 chronic myeloid leukemia, 9 polycythemia vera, 4 idiopathic myelofibrosis). Mutation scanning was performed using heteroduplex analysis with denaturing high-performance liquid chromatography (dHPLC). The entire mitochondrial genome was amplified in 67 overlapping polymerase chain reaction fragments carefully optimized regarding DNA melting profiles. Abnormal dHPLC findings were confirmed by DNA sequencing. RESULTS Heteroplasmic mtDNA mutations, mostly transitions, were identified in 56% of MDS and 44% of myeloproliferative disorders patients. In MDS, mutation frequency increased with age and more-advanced disease. Mutational spectra showed no hot spots and were similar in different types of MDS. Heteroplasmic mutations generally did not represent known polymorphisms, and about half of them affected conserved amino acids or nucleotides. Mutations were less frequent in protein encoding genes (50 per 10(6) base pairs) than other mitochondrial genes (transfer RNAs, ribosomal RNAs, and control region; about 80 per 10(6) base pairs). CONCLUSIONS As mitochondria often show ultrastructural abnormalities in MDS, including pathological iron accumulation, mitochondrial dysfunction may contribute to MDS pathology. We found a high frequency of acquired mtDNA mutations in MDS. However, their functional importance remains unclear, considering that genotype correlates poorly with phenotype in mitochondrial diseases. The clonally expanded mtDNA mutations in MDS support the concept of age-related damage to mtDNA in hematopoietic stem cells.
Collapse
Affiliation(s)
- Michael Wulfert
- Klinik für Hämatologie, Onkologie und Klinische Immunologie, Heinrich-Heine-Universität, Düsseldorf, Germany
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Lutz-Bonengel S, Sänger T, Parson W, Müller H, Ellwart JW, Follo M, Bonengel B, Niederstätter H, Heinrich M, Schmidt U. Single lymphocytes from two healthy individuals with mitochondrial point heteroplasmy are mainly homoplasmic. Int J Legal Med 2007; 122:189-97. [PMID: 17922134 DOI: 10.1007/s00414-007-0190-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Accepted: 07/26/2007] [Indexed: 11/26/2022]
Abstract
The nature of mitochondrial DNA heteroplasmy is still unclear. It could either be caused by two mitochondrial DNA (mtDNA) haplotypes coexisting within a single cell or by an admixture of homoplasmic cells, each of which contains only one type of mtDNA molecule. To address this question, single lymphocytes were separated by flow cytometry assisted cell sorting and analyzed by cycle sequencing or minisequencing. To attain the required PCR sensitivity, the reactions were carried out on the surface of chemically structured glass slides in a reaction volume of 1-2 microl. In this study, blood samples from two healthy donors showing mitochondrial point heteroplasmy in direct sequencing (195Y and 234R, respectively) were analyzed. Nearly 96% of single lymphocytes tested were found to be in a homoplasmic state, but heteroplasmic cells were also detected. These results suggest that mitochondrial point heteroplasmy in blood may well be mainly due to the mixture of homoplasmic cells.
Collapse
Affiliation(s)
- Sabine Lutz-Bonengel
- Institute of Legal Medicine, Albert Ludwig University Freiburg, Albertstrasse 9, 79104 Freiburg, Germany.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Gottlieb B, Beitel LK, Trifiro M. Will knowledge of human genome variation result in changing cancer paradigms? Bioessays 2007; 29:678-85. [PMID: 17563087 DOI: 10.1002/bies.20595] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Our incomplete understanding of carcinogenesis may be a significant reason why some cancer mortality rates are still increasing. This lack of understanding is likely due to a research approach that relies heavily on genetic comparison between cancerous and non-cancerous tissues and cells, which has led to the identification of genes of cancer proliferation rather than differentiation. Recent observations showing that a tremendous degree of natural human genetic variation occurs are likely to lead to a shift in the basic paradigms of cancer genetics, in that there is a need to consider both the nature of the genes involved, and the idea that not every genetic variation identified in these genes may be associated with carcinogenesis. Based on studies using LCM and micro-genetic analyses, we propose that significant cancer initiating events may take place during the very early stages of development of cancer-susceptible tissues and that using such techniques might greatly help us in our understanding of carcinogenesis.
Collapse
Affiliation(s)
- Bruce Gottlieb
- Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital, Montreal, Quebec, Canada.
| | | | | |
Collapse
|
20
|
Yao YG, Childs RW, Kajigaya S, McCoy JP, Young NS. Mitochondrial DNA sequence heterogeneity of single CD34+ cells after nonmyeloablative allogeneic stem cell transplantation. Stem Cells 2007; 25:2670-6. [PMID: 17628021 DOI: 10.1634/stemcells.2007-0269] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We applied a single-cell method to detect mitochondrial DNA (mtDNA) mutations to evaluate the reconstitution of hematopoietic stem cells (HSCs) and committed progenitor cells after nonmyeloablative allogeneic stem cell transplantation in humans. In a total of 1,958 single CD34(+) cells from six human leukocyte antigen-matched sibling donor and recipient pairs, individual CD34(+) clones were recognized based on the observed donor- or recipient-specific mtDNA sequence somatic alteration. There was no overall reduction of mtDNA heterogeneity among CD34(+) cells from the recipient after transplantation. Samples collected from two donors over time showed the persistence of certain CD34(+) clones marked by specific mutations. Our results demonstrate the feasibility of distinguishing donor and recipient individual CD34(+) clones based on mtDNA mutations during engraftment. HSCs were not limited in number, and similar mtDNA heterogeneity levels suggested representation of the total stem cell compartment during rapid hematopoietic reconstitution in the recipient. Disclosure of potential conflicts of interest is found at the end of this article.
Collapse
Affiliation(s)
- Yong-Gang Yao
- Hematology Branch, National Heart, Lung, and Blood Institute, NIH, Building 10 CRC, Room 3E-5140, 10 Center Drive, Bethesda, Maryland 20892-1202, USA.
| | | | | | | | | |
Collapse
|
21
|
Aikhionbare FO, Mehrabi S, Kumaresan K, Zavareh M, Olatinwo M, Odunsi K, Partridge E. Mitochondrial DNA sequence variants in epithelial ovarian tumor subtypes and stages. J Carcinog 2007; 6:1. [PMID: 17257433 PMCID: PMC1794240 DOI: 10.1186/1477-3163-6-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2006] [Accepted: 01/26/2007] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND A majority of primary ovarian neoplasms arise from cell surface epithelium of the ovaries. Although old age and a positive family history are associated risk factors, the etiology of the epithelial ovarian tumors is not completely understood. Additionally, knowledge of factors involved in the histogenesis of the various subtypes of this tumor as well as those factors that promote progression to advanced stages of ovarian malignancy are largely unknown. Current evidence suggests that mitochondrial alterations involved in cellular signaling pathways may be associated with tumorigenesis. METHODS In this study, we determined the presence of polymorphisms and other sequence variants of mitochondrial DNA (mtDNA) in 102 epithelial ovarian tumors including 10 matched normal tissues that paired with some of the tumors. High-resolution restriction endonucleases and PCR-based sequencing were used to assess the mtDNA variants spanning 3.3 kb fragment that comprised the D-Loop and 12S rRNA-tRNAphe, tRNAval, tRNAser, tRNAasp, tRNAlys, ATPase 6, ATPase 8, cytochrome oxidase I and II genes. RESULTS Three hundred and fifty-two (352) mtDNA sequence variants were identified, of which 238 of 352 (68%) have not been previously reported. There were relatively high frequencies of three mutations in the 12S rRNA gene at np 772, 773, and 780 in stage IIIC endometrioid tumors, two of which are novel (773delT and 780delC), and occurred with a frequency of 100% (7/7). Furthermore, two mutations were observed in serous tumors only at np 1657 in stage IV (10/10), and at np 8221delA in benign cystadenomas (3/3) and borderline tumors (4/4). A high frequency, 81% (13/16) of TC insertion at np 310 was found only in early stages of serous subtype (benign cystadenomas, 3/3; borderline tumors, 4/4; stage I tumors, 2/5 and matched normal tissues 4/4). CONCLUSION Our findings indicate that certain mtDNA mutations can reliably distinguish the different histologic subtypes of epithelial ovarian tumors. In addition, these data raise the possibility that certain mtDNA mutations may be useful biomarkers for predicting tumor aggressiveness and may play a potential role in tumorigenesis.
Collapse
Affiliation(s)
- Felix O Aikhionbare
- Department of Medicine, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Sharifeh Mehrabi
- Department of Medicine, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - K Kumaresan
- Department of Medicine, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Mojgan Zavareh
- Department of Medicine, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Moshood Olatinwo
- Department of Obstetrics and Gynecology, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Kunle Odunsi
- Department of Gynecologic Oncology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Edward Partridge
- University of Alabama, Comprehensive Cancer Center, Birmingham, AL 35294, USA
| |
Collapse
|
22
|
Yao YG, Ogasawara Y, Kajigaya S, Molldrem JJ, Falcão RP, Pintão MC, McCoy JP, Rizzatti EG, Young NS. Mitochondrial DNA sequence variation in single cells from leukemia patients. Blood 2007; 109:756-62. [PMID: 16946307 PMCID: PMC1785100 DOI: 10.1182/blood-2006-01-011007] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2006] [Accepted: 08/18/2006] [Indexed: 12/24/2022] Open
Abstract
A high frequency of mtDNA somatic mutation has been observed in many tumors as well as in aging tissues. In this study, we analyzed the mtDNA control region sequence variation in 3534 single normal cells and individual blasts from 18 patients with leukemia and 10 healthy donors, to address the mutation process in leukemic cells. We found significant differences in mtDNA sequence, as represented by the number of haplotypes and the mean number of cells with each nonaggregate haplotype in a population of cells, in patients compared to controls. Patients with similar clinical leukemia types, particularly acute myeloid leukemia (AML), did not show a uniform pattern of sequence variation in single blasts. Some patients at relapse presented a complex shift of major haplotypes in single cells. Four patients showed high frequencies of cells containing mutations 189, 260, 16150, and 16488, respectively, as a result of clonal expansion and could be considered as potential markers for their respective disease progression. To our knowledge, this is the first large-scale study of mtDNA variation in single malignant cells. Our results suggest that the somatic mutation process in leukemia is complex, leading to diverse levels of genetic alterations due to either intrinsic aspects of leukemia pathophysiology or chemotherapy effects.
Collapse
Affiliation(s)
- Yong-Gang Yao
- Hematology Branch and Flow Cytometry Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Yoji Ogasawara
- Hematology Branch and Flow Cytometry Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Sachiko Kajigaya
- Hematology Branch and Flow Cytometry Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Jeffrey J. Molldrem
- Department of Stem Cell Transplantation and Cellular Therapy, University of Texas M. D. Anderson Cancer Center, Houston, TX
| | - Roberto P. Falcão
- Division of Hematology, University of Sãtao Paulo at Ribeirao Preto Medical School, Ribeirão Preto, Brazil
| | - Maria-Carolina Pintão
- Division of Hematology, University of Sãtao Paulo at Ribeirao Preto Medical School, Ribeirão Preto, Brazil
| | - J. Philip McCoy
- Hematology Branch and Flow Cytometry Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Edgar Gil Rizzatti
- Division of Hematology, University of Sãtao Paulo at Ribeirao Preto Medical School, Ribeirão Preto, Brazil
| | - Neal S. Young
- Hematology Branch and Flow Cytometry Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| |
Collapse
|
23
|
Shin MG, Kim HJ, Kim HR, Lee IK, Kook H, Cho D, Kee SJ, Shin JH, Suh SP, Ryang DW. Mitochondrial DNA minisatellites as new markers for the quantitative determination of hematopoietic chimerism after allogeneic stem cell transplantation. Leukemia 2006; 21:369-73. [PMID: 17251903 DOI: 10.1038/sj.leu.2404502] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
24
|
Shin MG, Levin BC, Kim HJ, Kim HR, Lee IK, Cho D, Kee SJ, Shin JH, Suh SP, Ryang DW. Profiling of length heteroplasmies in the human mitochondrial DNA control regions from blood cells in the Korean population. Electrophoresis 2006; 27:1331-40. [PMID: 16502464 DOI: 10.1002/elps.200500551] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The length heteroplasmies in the hypervariable (HV) regions of mitochondrial DNA (mtDNA) from blood cells were examined in 57 healthy Korean donors. Interestingly, all the healthy Korean subjects displayed length heteroplasmies in both the HV1 and HV2 regions. Closer examination of the HV2 length heteroplasmies indicated that most of these donors (84%) exhibited a minimal 303-315 homopolymeric C (poly-C) tract frameshift of 1 bp (mixture of one major and minor mtDNA type). Sixteen percent of the donors however had poly-C tract frameshifts of 2 bp or more. The donor group with major length variants (two or more frameshifts) had about a two-fold decrease in mtDNA copy number compared with the group exhibiting only a 1 bp frameshift. This result supports the possibility that a severe frameshift in the 303-315 poly-C tract may also cause the impairment of mtDNA replication in hematopoietic tissue.
Collapse
Affiliation(s)
- Myung-Geun Shin
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, South Korea.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Tehranchi R. Impact of growth factors in the regulation of apoptosis in low-risk myelodysplastic syndromes. Med Oncol 2006; 23:37-49. [PMID: 16645228 DOI: 10.1385/mo:23:1:137] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2005] [Revised: 11/30/1999] [Accepted: 03/28/2005] [Indexed: 11/11/2022]
Abstract
Increased apoptosis of hematopoietic progenitors is a hallmark of myelodysplastic syndromes (MDS) and results in ineffective hematopoiesis. Erythroid apoptosis is thought to be the main mechanism underlying the severe anemia observed in the low-risk subgroups, refractory anemia (RA) and RA with ringed sideroblasts (RARS). Treatment with erythropoietin (Epo) alone or in combination with granulocyte colony-stimulating factor (G-CSF) may significantly improve anemia and reduce bone marrow apoptosis. A synergistic effect between Epo and G-CSF has been observed in the clinic, in particular in RARS. However, the molecular mechanisms beyond the anti-apoptotic effect of these growth factors have not been fully understood. This paper outlines the potential mechanisms underlying the augmented apoptosis during the erythroid differentiation in low-risk MDS as well as the anti-apoptotic effect of the growth factors.
Collapse
Affiliation(s)
- R Tehranchi
- Hematopoietic Stem Cell Laboratory, Lund Strategic Research Center for Stem Cell Biology and Cell Therapy, SE-22184 Lund, Sweden.
| |
Collapse
|
26
|
Khaidakov M, Reis RJS. Possibility of selection against mtDNA mutations in tumors. Mol Cancer 2005; 4:36. [PMID: 16159390 PMCID: PMC1232865 DOI: 10.1186/1476-4598-4-36] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2005] [Accepted: 09/13/2005] [Indexed: 11/16/2022] Open
Abstract
Several studies of tumors have revealed substantial numbers of clonally expanded somatic mutations in mitochondrial DNA (mtDNA), not observed in adjacent intact tissues. These findings were interpreted as indicating the involvement of mtDNA mutations in tumorigenesis. Such comparisons, however, ignore an important confounding factor: the monoclonal origin of tumors as opposed to the highly polyclonal nature of normal tissues. Analysis of recently published data on the incidence of somatic mutations in nontumor monoclonal cells suggests that, contrary to the prevailing view, the process of tumorigenesis may be accompanied by active selection against detrimental mtDNA mutations.
Collapse
Affiliation(s)
- M Khaidakov
- Department of Geriatrics, University of Arkansas for Medical Sciences, John McClellan Veterans Medical Center, 4300 West 7Street, Little Rock, AR 72205, USA
| | - RJ Shmookler Reis
- Department of Geriatrics, University of Arkansas for Medical Sciences, John McClellan Veterans Medical Center, 4300 West 7Street, Little Rock, AR 72205, USA
| |
Collapse
|
27
|
Ogasawara Y, Nakayama K, Tarnowka M, McCoy JP, Kajigaya S, Levin BC, Young NS. Mitochondrial DNA spectra of single human CD34+ cells, T cells, B cells, and granulocytes. Blood 2005; 106:3271-84. [PMID: 16020515 PMCID: PMC1895318 DOI: 10.1182/blood-2005-01-0150] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Previously, we described the age-dependent accumulation of mitochondrial DNA (mtDNA) mutations, leading to a high degree of mtDNA heterogeneity among normal marrow and blood CD34+ clones and in granulocytes. We established a method for sequence analysis of single cells. We show marked, distinct mtDNA heterogeneity from corresponding aggregate sequences in isolated cells of 5 healthy adult donors-37.9% +/- 3.6% heterogeneity in circulating CD34+ cells, 36.4% +/- 14.1% in T cells, 36.0% +/- 10.7% in B cells, and 47.7% +/- 7.4% in granulocytes. Most heterogeneity was caused by poly-C tract variability; however, base substitutions were also prevalent, as follows: 14.7% +/- 5.7% in CD34+ cells, 15.2% +/- 9.0% in T cells, 15.4% +/- 6.7% in B cells, and 32.3% +/- 2.4% in granulocytes. Many poly-C tract length differences and specific point mutations seen in these same donors but assayed 2 years earlier were still present in the new CD34+ samples. Additionally, specific poly-C tract differences and point mutations were frequently shared among cells of the lymphoid and myeloid lineages. Secular stability and lineage sharing of mtDNA sequence variability suggest that mutations arise in the lymphohematopoietic stem cell compartment and that these changes may be used as a natural genetic marker to estimate the number of active stem cells.
Collapse
Affiliation(s)
- Yoji Ogasawara
- Hematology Branch and Flow Cytometry Core Facility, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), Bldg 10 CRC, 3E-5140, 9000 Rockville Pike, Bethesda, MD 20892-1202, USA
| | | | | | | | | | | | | |
Collapse
|