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Yang X, Gan Y, Zhang Y, Liu Z, Geng J, Wang W. Microbial genotoxin-elicited host DNA mutations related to mitochondrial dysfunction, a momentous contributor for colorectal carcinogenesis. mSystems 2024; 9:e0088724. [PMID: 39189772 PMCID: PMC11406885 DOI: 10.1128/msystems.00887-24] [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] [Indexed: 08/28/2024] Open
Abstract
Gut microbe dysbiosis increases repetitive inflammatory responses, leading to an increase in the incidence of colorectal cancer. Recent studies have revealed that specific microbial species directly instigate mutations in the host nucleus DNA, thereby accelerating the progression of colorectal cancer. Given the well-established role of mitochondrial dysfunction in promoting colorectal cancer, it is reasonable to postulate that gut microbes may induce mitochondrial gene mutations, thereby inducing mitochondrial dysfunction. In this review, we focus on gut microbial genotoxins and their known and potential targets in mitochondrial genes. Consequently, we propose that targeted disruption of genotoxin transport pathways may effectively reduce the rate of mitochondrial gene mutations and yield substantial benefits for the prevention of colorectal carcinogenesis.
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Affiliation(s)
- Xue Yang
- Department of Infectious Disease and Hepatic Disease, The Affiliated Hospital of Kunming University of Science and Technology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
- School of Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Yumeng Gan
- Department of Infectious Disease and Hepatic Disease, The Affiliated Hospital of Kunming University of Science and Technology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
- School of Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Yuting Zhang
- Department of Infectious Disease and Hepatic Disease, The Affiliated Hospital of Kunming University of Science and Technology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Zhongjian Liu
- Institute of Basic and Clinical Medicine, First People's Hospital of Yunnan Province, Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Jiawei Geng
- Department of Infectious Disease and Hepatic Disease, The Affiliated Hospital of Kunming University of Science and Technology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
- School of Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Wenxue Wang
- Department of Infectious Disease and Hepatic Disease, The Affiliated Hospital of Kunming University of Science and Technology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
- School of Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
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2
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Bajpai A, Desai NN, Pandey S, Shukla C, Datta B, Basu S. Chimeric nanoparticles for targeting mitochondria in cancer cells. NANOSCALE ADVANCES 2022; 4:1112-1118. [PMID: 36131756 PMCID: PMC9419202 DOI: 10.1039/d1na00644d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 01/07/2022] [Indexed: 06/15/2023]
Abstract
Mitochondrial dysfunction is implicated in myriad diseases, including cancer. Subsequently, targeting mitochondrial DNA (mt-DNA) in cancer cells has emerged as an unorthodox strategy for anti-cancer therapy. However, approaches targeting only one component of the mitochondrial "central dogma" can be evaded by cancer cells through various mechanisms. To address this, herein, we have engineered mitochondria-targeting cholesterol-based chimeric nanoparticles (mt-CNPs) consisting of cisplatin, camptothecin, and tigecycline, which can simultaneously impair mt-DNA, mitochondrial topoisomerase I (mt-Top1), and mitochondrial ribosomes. mt-CNPs were characterized as being positively charged, spherical in shape, and 187 nm in diameter. Confocal microscopy confirmed that mt-CNPs efficiently localized into the mitochondria of A549 lung cancer cells within 6 h, followed by mitochondrial morphology damage and the subsequent generation of reactive oxygen species (ROS). mt-CNPs showed remarkable cancer-cell killing abilities compared to free-drug combinations in A549 (lung), HeLa (cervical), and MCF7 (breast) cancer cells. These mitochondria-targeting lipidic chimeric nanoparticles could be explored further to impair multiple targets in mitochondria, helping researchers to gain an understanding of mitochondrial translational and transcriptional machinery and to develop new strategies for cancer therapy.
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Affiliation(s)
- Aman Bajpai
- Discipline of Chemistry, Indian Institute of Technology (IIT) Gandhinagar Palaj Gandhinagar Gujarat 382355 India
| | - Nakshi Nayan Desai
- Discipline of Biological Engineering, Indian Institute of Technology (IIT) Gandhinagar Palaj Gandhinagar Gujarat 382355 India
| | - Shalini Pandey
- Discipline of Chemistry, Indian Institute of Technology (IIT) Gandhinagar Palaj Gandhinagar Gujarat 382355 India
| | - Chinmayee Shukla
- Discipline of Biological Engineering, Indian Institute of Technology (IIT) Gandhinagar Palaj Gandhinagar Gujarat 382355 India
| | - Bhaskar Datta
- Discipline of Chemistry, Indian Institute of Technology (IIT) Gandhinagar Palaj Gandhinagar Gujarat 382355 India
- Discipline of Biological Engineering, Indian Institute of Technology (IIT) Gandhinagar Palaj Gandhinagar Gujarat 382355 India
| | - Sudipta Basu
- Discipline of Chemistry, Indian Institute of Technology (IIT) Gandhinagar Palaj Gandhinagar Gujarat 382355 India
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3
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Bajpai A, Desai NN, Pandey S, Shukla C, Datta B, Basu S. Nanoparticle-Mediated Routing of Antibiotics into Mitochondria in Cancer Cells. ACS APPLIED BIO MATERIALS 2021; 4:6799-6806. [PMID: 35006980 DOI: 10.1021/acsabm.1c00527] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In recent years, antibiotics have emerged as alternative medicines in cancer therapy due to their capability of mitochondrial dysfunction in cancer cells. However, antibiotics render collateral damage in noncancerous cells by targeting mitochondrial transcription and translational machinery. To address this, herein, we have engineered three different mitochondria-targeted cationic antibiotic (tigecycline)-loaded nanoparticles from cholesterol conjugates. Dynamic light scattering and electron microscopy confirmed the spherical morphology and a less than 200 nm hydrodynamic diameter for these nanoparticles. The triphenylphosphine-coated tigecycline-loaded nanoparticle (Mito-TPP-Tig-NP) was shown to be homed into the mitochondria of A549 lung cancer cells compared to the other cationic nanoparticles. These Mito-TPP-Tig-NPs indeed triggered mitochondrial morphology damage and generation of reactive oxygen species (ROS). All the mitochondria-targeted tigecycline-loaded nanoparticles showed improved cancer cell killing ability in A549 and HeLa cervical cancer cells compared to free tigecycline. Moreover, Mito-TPP-Tig-NPs showed much less toxicity toward noncancerous human embryonic kidney cells (HEK293) compared to free tigecycline. These antibiotic-loaded mitochondria-targeted nanoparticles can open up an avenue toward anticancer therapy.
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Affiliation(s)
- Aman Bajpai
- Discipline of Chemistry, Indian Institute of Technology (IIT) Gandhinagar, Palaj, Gandhinagar, Gujarat 382355, India
| | - Nakshi Nayan Desai
- Discipline of Biological Engineering, Indian Institute of Technology (IIT) Gandhinagar, Palaj, Gandhinagar, Gujarat 382355, India
| | - Shalini Pandey
- Discipline of Chemistry, Indian Institute of Technology (IIT) Gandhinagar, Palaj, Gandhinagar, Gujarat 382355, India.,Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, Pune, Maharashtra 411008, India
| | - Chinmayee Shukla
- Discipline of Biological Engineering, Indian Institute of Technology (IIT) Gandhinagar, Palaj, Gandhinagar, Gujarat 382355, India
| | - Bhaskar Datta
- Discipline of Chemistry, Indian Institute of Technology (IIT) Gandhinagar, Palaj, Gandhinagar, Gujarat 382355, India.,Discipline of Biological Engineering, Indian Institute of Technology (IIT) Gandhinagar, Palaj, Gandhinagar, Gujarat 382355, India
| | - Sudipta Basu
- Discipline of Chemistry, Indian Institute of Technology (IIT) Gandhinagar, Palaj, Gandhinagar, Gujarat 382355, India
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4
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Marquez J, Flores J, Kim AH, Nyamaa B, Nguyen ATT, Park N, Han J. Rescue of TCA Cycle Dysfunction for Cancer Therapy. J Clin Med 2019; 8:jcm8122161. [PMID: 31817761 PMCID: PMC6947145 DOI: 10.3390/jcm8122161] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 11/30/2019] [Accepted: 12/04/2019] [Indexed: 02/07/2023] Open
Abstract
Mitochondrion, a maternally hereditary, subcellular organelle, is the site of the tricarboxylic acid (TCA) cycle, electron transport chain (ETC), and oxidative phosphorylation (OXPHOS)—the basic processes of ATP production. Mitochondrial function plays a pivotal role in the development and pathology of different cancers. Disruption in its activity, like mutations in its TCA cycle enzymes, leads to physiological imbalances and metabolic shifts of the cell, which contributes to the progression of cancer. In this review, we explored the different significant mutations in the mitochondrial enzymes participating in the TCA cycle and the diseases, especially cancer types, that these malfunctions are closely associated with. In addition, this paper also discussed the different therapeutic approaches which are currently being developed to address these diseases caused by mitochondrial enzyme malfunction.
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Affiliation(s)
- Jubert Marquez
- Department of Health Science and Technology, College of Medicine, Inje University, Busan 47392, Korea; (J.M.); (A.H.K.)
| | - Jessa Flores
- Department of Physiology, College of Medicine, Inje University, Busan 47392, Korea; (J.F.); (B.N.); (A.T.T.N.)
| | - Amy Hyein Kim
- Department of Health Science and Technology, College of Medicine, Inje University, Busan 47392, Korea; (J.M.); (A.H.K.)
| | - Bayalagmaa Nyamaa
- Department of Physiology, College of Medicine, Inje University, Busan 47392, Korea; (J.F.); (B.N.); (A.T.T.N.)
- Department of Hematology, Mongolian National University of Medical Sciences, Ulaanbaatar 14210, Mongolia
| | - Anh Thi Tuyet Nguyen
- Department of Physiology, College of Medicine, Inje University, Busan 47392, Korea; (J.F.); (B.N.); (A.T.T.N.)
| | - Nammi Park
- Cardiovascular and Metabolic Disease Center, Paik Hospital, Inje University, Busan 47392, Korea;
| | - Jin Han
- Department of Health Science and Technology, College of Medicine, Inje University, Busan 47392, Korea; (J.M.); (A.H.K.)
- Department of Physiology, College of Medicine, Inje University, Busan 47392, Korea; (J.F.); (B.N.); (A.T.T.N.)
- Cardiovascular and Metabolic Disease Center, Paik Hospital, Inje University, Busan 47392, Korea;
- Correspondence: ; Tel.: +8251-890-8748
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5
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Mahalaxmi I, Santhy K. An overview about mitochondrial DNA mutations in ovarian cancer. ALEXANDRIA JOURNAL OF MEDICINE 2019. [DOI: 10.1016/j.ajme.2017.05.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Iyer Mahalaxmi
- Department of Zoology, Avinashilingam Institute for Home Science and Higher Education for Women, India
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Walther-António MRS, Chen J, Multinu F, Hokenstad A, Distad TJ, Cheek EH, Keeney GL, Creedon DJ, Nelson H, Mariani A, Chia N. Potential contribution of the uterine microbiome in the development of endometrial cancer. Genome Med 2016; 8:122. [PMID: 27884207 PMCID: PMC5123330 DOI: 10.1186/s13073-016-0368-y] [Citation(s) in RCA: 219] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 10/13/2016] [Indexed: 12/19/2022] Open
Abstract
Background Endometrial cancer studies have led to a number of well-defined but mechanistically unconnected genetic and environmental risk factors. One of the emerging modulators between environmental triggers and genetic expression is the microbiome. We set out to inquire about the composition of the uterine microbiome and its putative role in endometrial cancer. Methods We undertook a study of the microbiome in samples taken from different locations along the female reproductive tract in patients with endometrial cancer (n = 17), patients with endometrial hyperplasia (endometrial cancer precursor, n = 4), and patients afflicted with benign uterine conditions (n = 10). Vaginal, cervical, Fallopian, ovarian, peritoneal, and urine samples were collected aseptically both in the operating room and the pathology laboratory. DNA extraction was followed by amplification and high-throughput next generation sequencing (MiSeq) of the 16S rDNA V3-V5 region to identify the microbiota present. Microbiota data were summarized using both α-diversity to reflect species richness and evenness within bacterial populations and β-diversity to reflect the shared diversity between bacterial populations. Statistical significance was determined through the use of multiple testing, including the generalized mixed-effects model. Results The microbiome sequencing (16S rDNA V3-V5 region) revealed that the microbiomes of all organs (vagina, cervix, Fallopian tubes, and ovaries) are significantly correlated (p < 0.001) and that there is a structural microbiome shift in the cancer and hyperplasia cases, distinguishable from the benign cases (p = 0.01). Several taxa were found to be significantly enriched in samples belonging to the endometrial cancer cohort: Firmicutes (Anaerostipes, ph2, Dialister, Peptoniphilus, 1–68, Ruminococcus, and Anaerotruncus), Spirochaetes (Treponema), Actinobacteria (Atopobium), Bacteroidetes (Bacteroides and Porphyromonas), and Proteobacteria (Arthrospira). Of particular relevance, the simultaneous presence of Atopobium vaginae and an uncultured representative of the Porphyromonas sp. (99 % match to P. somerae) were found to be associated with disease status, especially if combined with a high vaginal pH (>4.5). Conclusions Our results suggest that the detection of A. vaginae and the identified Porphyromonas sp. in the gynecologic tract combined with a high vaginal pH is statistically associated with the presence of endometrial cancer. Given the documented association of the identified microorganisms with other pathologies, these findings raise the possibility of a microbiome role in the manifestation, etiology, or progression of endometrial cancer that should be further investigated. Electronic supplementary material The online version of this article (doi:10.1186/s13073-016-0368-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | - Jun Chen
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, 55905, USA
| | - Francesco Multinu
- Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Alexis Hokenstad
- Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Tammy J Distad
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA
| | - E Heidi Cheek
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Gary L Keeney
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Douglas J Creedon
- Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, MN, 55905, USA.,Present Address: North Memorial Medical Center, Robbinsdale, MN, 55442, USA
| | - Heidi Nelson
- Department of Surgery, Mayo Clinic, Rochester, MN, 55905, USA.,Center for Individualized Medicine, Mayo Clinic, Rochester, MN, 55905, USA
| | - Andrea Mariani
- Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, MN, 55905, USA.
| | - Nicholas Chia
- Department of Surgery, Mayo Clinic, Rochester, MN, 55905, USA. .,Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA. .,Center for Individualized Medicine, Mayo Clinic, Rochester, MN, 55905, USA.
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7
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Ghosh S, Dungdung SR, Choudhury ST, Chakraborty S, Das N. Mitochondria protection with ginkgolide B-loaded polymeric nanocapsules prevents diethylnitrosamine-induced hepatocarcinoma in rats. Nanomedicine (Lond) 2014; 9:441-56. [DOI: 10.2217/nnm.13.56] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Aim: Hepatocellular carcinoma (HCC) has no successful pharmacotherapeutic remedy. The aim of this study was to ascertain whether ginkgolide B (GB)-loaded polymeric nanocapsules can prevent diethylnitrosamine (DEN)-induced HCC in rats. Materials & methods: GB was fabricated in two types of nanocapsules of which one was polyethylene glycol coated (N1GB) and the other was uncoated (N2GB). These nanocapsules were orally gavaged during DEN-induced HCC development in rats. Results: Nanocapsulation of GB enabled aqueous suspension and slow time-dependent release of the compound. Anticarcinogenic potential of N2GB was reflected by its ability in the management of DEN-induced reactive oxygen species generation, mitochondrial dysfunction, p53, NF-κB, inducible nitric oxide synthase, COX-2 and VEGF expressions, and induction of apoptosis in cancer cells in the rat liver. Conclusion: Positive zeta-potential on N2GB surface might have offered higher hepatic accumulation of GB, especially at the electron-dense organelle mitochondria. Mitochondria protection against DEN-induced oxidative damage ensured HCC prevention. Original submitted 27 June 2012; Revised submitted 4 December 2012; Published online 7 June 2013
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Affiliation(s)
- Swarupa Ghosh
- Cell Biology & Physiology Division, Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Kolkata-700032, India
| | - Sandhya Rekha Dungdung
- Cell Biology & Physiology Division, Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Kolkata-700032, India
| | - Somsubhra Thakur Choudhury
- Drug Development, Diagnostics & Biotechnology Division, Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Kolkata-700032, India
| | - Somsuta Chakraborty
- Drug Development, Diagnostics & Biotechnology Division, Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Kolkata-700032, India
| | - Nirmalendu Das
- Drug Development, Diagnostics & Biotechnology Division, Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Kolkata-700032, India
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8
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Abstract
PARK2 (PARKIN) is an E3 ubiquitin ligase involved in multiple signaling pathways and cellular processes. Activity of PARK2 is tightly regulated through inter- and intra-molecular interactions. Dysfunction of PARK2 is associated with the progression of parkinsonism. Notably, frequent PARK2 inactivation has been identified in various human cancers. Park2-deficient mice are more susceptible to tumorigenesis, indicating its crucial role as a tumor suppressor. However, biological studies also show that PARK2 possesses both pro-survival and growth suppressive functions. Here, we summarize the genetic lesions of PARK2 in human cancers and discuss the current knowledge of PARK2 in cancer progression. We further highlight future efforts for the study of PARK2 in cancer.
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9
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Parr RL, Jakupciak JP, Birch-Machin MA, Dakubo GD. The mitochondrial genome: a biosensor for early cancer detection? ACTA ACUST UNITED AC 2013; 1:169-82. [PMID: 23489304 DOI: 10.1517/17530059.1.2.169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Mutations in the mitochondrial genome have been reported as biomarkers for the detection of cancer. Hallmarks of cancer development include the accumulation of genetic alterations in the mitochondrial and nuclear genomes. Damage to mitochondria affects energy metabolism, generation of reactive oxygen species, apoptosis, cell growth and other processes that contribute to the neoplastic process. Furthermore, mitochondrial DNA mutations occur frequently in cancer. Little work has been done to link a pathway between mitochondrial mutations and cancer etiology. Volumes of work have been reported on the association of mitochondrial mutations and almost all types of cancer including the use of body fluids for early detection. This review examines the measurement of mitochondrial mutations for the application of detecting human tumor tissue.
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Affiliation(s)
- Ryan L Parr
- Vice President of Research, Genesis Genomics, Inc., 290 Munro Street, Ste 1000, Thunder Bay, Ontario, P7A 7T1, Canada +1 807 346 8100; +1 807 346 8105 ;
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10
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Grzybowska-Szatkowska L, Slaska B. Mitochondrial DNA and carcinogenesis (review). Mol Med Rep 2012; 6:923-30. [PMID: 22895648 DOI: 10.3892/mmr.2012.1027] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2012] [Accepted: 07/26/2012] [Indexed: 11/05/2022] Open
Abstract
The role of the mitochondria in the process of carcinogenesis has drawn researchers' attention since the discovery of respiratory deficit in cells, particularly those characterized by rapid proliferation. The deficit was assumed to stimulate further differentiation of the cells and initiate the process of neoplastic transformation. As many as 25-80% of somatic mutations in mitochondrial DNA (mtDNA) are found in various neoplasms. These mutations are considered to trigger the neoplastic transformation through shifts of cell energy resources, an increase in the mitochondrial oxidative stress and modulation of apoptosis. The question arises as to whether the mtDNA mutations precede a neoplasm or whether they are a result of changes and processes that take place during neoplastic proliferation.
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11
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Morfouace M, Lalier L, Bahut M, Bonnamain V, Naveilhan P, Guette C, Oliver L, Gueguen N, Reynier P, Vallette FM. Comparison of spheroids formed by rat glioma stem cells and neural stem cells reveals differences in glucose metabolism and promising therapeutic applications. J Biol Chem 2012; 287:33664-74. [PMID: 22782899 DOI: 10.1074/jbc.m111.320028] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Cancer stem cells (CSCs) are thought to be partially responsible for cancer resistance to current therapies and tumor recurrence. Dichloroacetate (DCA), a compound capable of shifting metabolism from glycolysis to glucose oxidation, via an inhibition of pyruvate dehydrogenase kinase was used. We show that DCA is able to shift the pyruvate metabolism in rat glioma CSCs but has no effect in rat neural stem cells. DCA forces CSCs into oxidative phosphorylation but does not trigger the production of reactive oxygen species and consecutive anti-cancer apoptosis. However, DCA, associated with etoposide or irradiation, induced a Bax-dependent apoptosis in CSCs in vitro and decreased their proliferation in vivo. The former phenomenon is related to DCA-induced Foxo3 and p53 expression, resulting in the overexpression of BH3-only proteins (Bad, Noxa, and Puma), which in turn facilitates Bax-dependent apoptosis. Our results demonstrate that a small drug available for clinical studies potentiates the induction of apoptosis in glioma CSCs.
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Affiliation(s)
- Marie Morfouace
- UMR INSERM 892-CNRS 6299, Centre de Recherche en Cancérologie Nantes-Angers, Nantes, France
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12
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Chen PL, Chen CF, Chen Y, Guo XE, Huang CK, Shew JY, Reddick RL, Wallace DC, Lee WH. Mitochondrial genome instability resulting from SUV3 haploinsufficiency leads to tumorigenesis and shortened lifespan. Oncogene 2012; 32:1193-201. [PMID: 22562243 PMCID: PMC3416964 DOI: 10.1038/onc.2012.120] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Mitochondrial dysfunction has been a hallmark of cancer. However, whether it has a causative role awaits to be elucidated. Here, using an animal model derived from inactivation of SUV3, a mitochondrial helicase, we demonstrated that mSuv3+/- mice harbored increased mitochondrial DNA (mtDNA) mutations and decreased mtDNA copy numbers, leading to tumor development in various sites and shortened lifespan. These phenotypes were transmitted maternally, indicating the etiological role of the mitochondria. Importantly, reduced SUV3 expression was observed in human breast tumor specimens compared with corresponding normal tissues in two independent cohorts. These results demonstrated for the first time that maintaining mtDNA integrity by SUV3 helicase is critical for cancer suppression.
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Affiliation(s)
- P-L Chen
- Department of Biological Chemistry, School of Medicine, University of California, Irvine, CA, USA.
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13
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Compton S, Kim C, Griner NB, Potluri P, Scheffler IE, Sen S, Jerry DJ, Schneider S, Yadava N. Mitochondrial dysfunction impairs tumor suppressor p53 expression/function. J Biol Chem 2011; 286:20297-312. [PMID: 21502317 DOI: 10.1074/jbc.m110.163063] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Recently, mitochondria have been suggested to act in tumor suppression. However, the underlying mechanisms by which mitochondria suppress tumorigenesis are far from being clear. In this study, we have investigated the link between mitochondrial dysfunction and the tumor suppressor protein p53 using a set of respiration-deficient (Res(-)) mammalian cell mutants with impaired assembly of the oxidative phosphorylation machinery. Our data suggest that normal mitochondrial function is required for γ-irradiation (γIR)-induced cell death, which is mainly a p53-dependent process. The Res(-) cells are protected against γIR-induced cell death due to impaired p53 expression/function. We find that the loss of complex I biogenesis in the absence of the MWFE subunit reduces the steady-state level of the p53 protein, although there is no effect on the p53 protein level in the absence of the ESSS subunit that is also essential for complex I assembly. The p53 protein level was also reduced to undetectable levels in Res(-) cells with severely impaired mitochondrial protein synthesis. This suggests that p53 protein expression is differentially regulated depending upon the type of electron transport chain/respiratory chain deficiency. Moreover, irrespective of the differences in the p53 protein expression profile, γIR-induced p53 activity is compromised in all Res(-) cells. Using two different conditional systems for complex I assembly, we also show that the effect of mitochondrial dysfunction on p53 expression/function is a reversible phenomenon. We believe that these findings will have major implications in the understanding of cancer development and therapy.
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Affiliation(s)
- Shannon Compton
- Pioneer Valley Life Sciences Institute, Springfield, Massachusetts 01107, USA
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14
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de Moura MB, dos Santos LS, Van Houten B. Mitochondrial dysfunction in neurodegenerative diseases and cancer. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2010; 51:391-405. [PMID: 20544881 DOI: 10.1002/em.20575] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Mitochondria are important integrators of cellular function and therefore affect the homeostatic balance of the cell. Besides their important role in producing adenosine triphosphate through oxidative phosphorylation, mitochondria are involved in the control of cytosolic calcium concentration, metabolism of key cellular intermediates, and Fe/S cluster biogenesis and contributed to programmed cell death. Mitochondria are also one of the major cellular producers of reactive oxygen species (ROS). Several human pathologies, including neurodegenerative diseases and cancer, are associated with mitochondrial dysfunction and increased ROS damage. This article reviews how dysfunctional mitochondria contribute to Alzheimer's disease, Parkinson's disease, Huntington's disease, and several human cancers.
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Affiliation(s)
- Michelle Barbi de Moura
- Department of Pharmacology and Chemical Biology, University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania, USA
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15
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Chang HW, Chuang LY, Cheng YH, Gu DL, Huang HW, Yang CH. An introduction to mitochondrial informatics. Methods Mol Biol 2010; 628:259-74. [PMID: 20238086 DOI: 10.1007/978-1-60327-367-1_14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In this chapter, we review the public resources available for human mitochondrial DNA and protein related bioinformatics, with a special focus on mitochondrial single nucleotide polymorphisms (mtSNPs). We also review our own freeware tool V-MitoSNP, giving an overview of its implementation and program workflow. Apart from these, we review several protocols for the graphic input of genes, keywords, gene searching by sequence, mtSNP searching by sequence, restriction enzyme mining, primer design, and virtual electrophoresis for PCR-RFLP genotyping. Some databases with similar function are integrated and compared.
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Affiliation(s)
- Hsueh-Wei Chang
- Department of Biomedical Science and Environmental Biology, Center of Excellence for Environmental Medicine, Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung, Taiwan
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Molecular oncology focus - is carcinogenesis a 'mitochondriopathy'? J Biomed Sci 2010; 17:31. [PMID: 20416110 PMCID: PMC2876137 DOI: 10.1186/1423-0127-17-31] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2010] [Accepted: 04/25/2010] [Indexed: 01/08/2023] Open
Abstract
Mitochondria are sub-cellular organelles that produce adenosine triphosphate (ATP) through oxidative phosphorylation (OXPHOS). As suggested over 70 years ago by Otto Warburg and recently confirmed with molecular techniques, alterations in respiratory activity and in mitochondrial DNA (mtDNA) appear to be common features of malignant cells. Somatic mtDNA mutations have been reported in many types of cancer cells, and some reports document the prevalence of inherited mitochondrial DNA polymorphisms in cancer patients. Nevertheless, a careful reanalysis of methodological criteria and methodology applied in those reports has shown that numerous papers can't be used as relevant sources of data for systematic review, meta-analysis, or finally for establishment of clinically applicable markers. In this review technical and conceptual errors commonly occurring in the literature are summarized. In the first place we discuss, why many of the published papers cannot be used as a valid and clinically useful sources of evidence in the biomedical and healthcare contexts. The reasons for introduction of noise in data and in consequence - bias for the interpretation of the role of mitochondrial DNA in the complex process of tumorigenesis are listed. In the second part of the text practical aspects of mtDNA research and requirements necessary to fulfill in order to use mtDNA analysis in clinics are shown. Stringent methodological criteria of a case-controlled experiment in molecular medicine are indicated. In the third part we suggest, what lessons can be learned for the future and propose guidelines for mtDNA analysis in oncology. Finally we conclude that, although several conceptual and methodological difficulties hinder the research on mitochondrial patho-physiology in cancer cells, this area of molecular medicine should be considered of high importance for future clinical practice.
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Czarnecka AM, Klemba A, Semczuk A, Plak K, Marzec B, Krawczyk T, Kofler B, Golik P, Bartnik E. Common mitochondrial polymorphisms as risk factor for endometrial cancer. Int Arch Med 2009; 2:33. [PMID: 19863780 PMCID: PMC2775024 DOI: 10.1186/1755-7682-2-33] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Accepted: 10/28/2009] [Indexed: 01/15/2023] Open
Abstract
Endometrial carcinoma is the most commonly diagnosed gynaecological cancer in developed countries. Although the molecular genetics of this disease has been in the focus of many research laboratories for the last 20 years, relevant prognostic and diagnostic markers are still missing. At the same time mitochondrial DNA mutations have been reported in many types of cancer during the last two decades. It is therefore very likely that the mitochondrial genotype is one of the cancer susceptibility factors. To investigate the presence of mtDNA somatic mutations and distribution of inherited polymorphisms in endometrial adenocarcinoma patients we analyzed the D-loop sequence of cancer samples and their corresponding normal tissues and moreover performed mitochondrial haplogroup analysis. We detected 2 somatic mutation and increased incidence of mtDNA polymorphisms, in particular 16223C (80% patients, p = 0.005), 16126C (23%, p = 0.025) and 207A (19%, p = 0.027). Subsequent statistical analysis revealed that endometrial carcinoma population haplogroup distribution differs from the Polish population and that haplogroup H (with its defining polymorphism - C7028T) is strongly underrepresented (p = 0.003), therefore might be a cancer-protective factor. Our report supports the notion that mtDNA polymorphisms establish a specific genetic background for endometrial adenocarcinoma development and that mtDNA analysis may result in the development of new molecular tool for cancer detection.
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Affiliation(s)
- Anna M Czarnecka
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Pawinskiego 5a, 02-106, Warsaw, Poland.,School of Molecular Medicine, Medical University of Warsaw, Zwirki i Wigury 61, 02-091 Warsaw, Poland
| | - Aleksandra Klemba
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Pawinskiego 5a, 02-106, Warsaw, Poland
| | - Andrzej Semczuk
- II Clinic and Ward of Gynecology, Medical University of Lublin, Lublin, Poland
| | - Katarzyna Plak
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Pawinskiego 5a, 02-106, Warsaw, Poland
| | - Barbara Marzec
- Department of Human Genetics, Lublin University School of Medicine, Lublin, Poland
| | - Tomasz Krawczyk
- Clinical Pathology Laboratory, Monument Institute of Polish Mothers Health Center, Lodz, Poland
| | - Barbara Kofler
- Department of Pediatrics, University Hospital Salzburg, Paracelsus Medical University, Müllner Hauptstr 48, A-5020 Salzburg, Austria
| | - Pawel Golik
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Pawinskiego 5a, 02-106, Warsaw, Poland.,Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawinskiego 5a, 02-106 Warsaw, Poland
| | - Ewa Bartnik
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Pawinskiego 5a, 02-106, Warsaw, Poland.,Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawinskiego 5a, 02-106 Warsaw, Poland
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Kim HH, Kim T, Kim E, Park JK, Park SJ, Joo H, Kim HJ. The Mitochondrial Warburg Effect: A Cancer Enigma. ACTA ACUST UNITED AC 2009. [DOI: 10.4051/ibc.2009.2.0007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Partridge MA, Huang SXL, Kibriya MG, Ahsan H, Davidson MM, Hei TK. Environmental mutagens induced transversions but not transitions in regulatory region of mitochondrial DNA. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2009; 72:301-4. [PMID: 19184745 DOI: 10.1080/15287390802526381] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
One of the long-term objectives of the research in our laboratory was to determine whether mitochondrial DNA (mtDNA) mutations were generated in cell lines exposed to a variety of known mutagens. Many of these mutagens are known to increase oxidative stress in the cell, and one potential outcome of this would be an increased incidence of point mutations in mtDNA. Recently, there has been some controversy regarding the validity of point mutations in the regulatory region of mtDNA as a predictive or causative marker for carcinogenesis. Studies were undertaken to assess whether nuclear mutagens such as arsenic (As), asbestos, and ultraviolet (UV) and gamma-radiation, induced both heteroplasmic and homoplasmic point mutations in mtDNA. A direct sequencing approach was used to reduce the occurrence of experimental errors and cross-checked all base changes with databases of known polymorphisms. Our results showed that, while base changes did occur, there was no marked difference between the number of changes in treated and untreated cells. Furthermore, in human lymphocyte samples from subjects exposed to As, most of these base changes were previously reported. Interestingly, there was an increase in the number of transversions (purine ( pyrimidine) in smokers from a human population study, but as with the findings in cell culture samples, there was no difference in the total number of base changes. Data suggest that only a change in the number of rare transversions would be indicative of an increase in point mutations in mtDNA after exposure to mutagens.
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Affiliation(s)
- Michael A Partridge
- Center for Radiological Research, Columbia University, New York, NY 10032, USA
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20
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Bragoszewski P, Kupryjanczyk J, Bartnik E, Rachinger A, Ostrowski J. Limited clinical relevance of mitochondrial DNA mutation and gene expression analyses in ovarian cancer. BMC Cancer 2008; 8:292. [PMID: 18842121 PMCID: PMC2571110 DOI: 10.1186/1471-2407-8-292] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2008] [Accepted: 10/08/2008] [Indexed: 12/19/2022] Open
Abstract
Background In recent years, numerous studies have investigated somatic mutations in mitochondrial DNA in various tumours. The observed high mutation rates might reflect mitochondrial deregulation; consequently, mutation analyses could be clinically relevant. The purpose of this study was to determine if mutations in the mitochondrial D-loop region and/or the level of mitochondrial gene expression could influence the clinical course of human ovarian carcinomas. Methods We sequenced a 1320-base-pair DNA fragment of the mitochondrial genome (position 16,000-750) in 54 cancer samples and in 44 corresponding germline control samples. In addition, six transcripts (MT-ATP6, MT-CO1, MT-CYB, MT-ND1, MT-ND6, and MT-RNR1) were quantified in 62 cancer tissues by real-time RT-PCR. Results Somatic mutations in the D-loop sequence were found in 57% of ovarian cancers. Univariate analysis showed no association between mitochondrial DNA mutation status or mitochondrial gene expression and any of the examined clinicopathologic parameters. A multivariate logistic regression model revealed that the expression of the mitochondrial gene RNR1 might be used as a predictor of tumour sensitivity to chemotherapy. Conclusion In contrast to many previously published papers, our study indicates rather limited clinical relevance of mitochondrial molecular analyses in ovarian carcinomas. These discrepancies in the clinical utility of mitochondrial molecular tests in ovarian cancer require additional large, well-designed validation studies.
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Affiliation(s)
- Piotr Bragoszewski
- Department of Gastroenterology and Hepatology, Medical Center for Postgraduate Education at the Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Roentgena 5, Warsaw, Poland.
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21
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Mende S, Koch R, Schmiedel J, Reichmann H, Storch A. Association of mitochondrial disorders with lymphoid malignancies. Mitochondrion 2007; 7:401-3. [DOI: 10.1016/j.mito.2007.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2007] [Revised: 08/13/2007] [Accepted: 08/28/2007] [Indexed: 10/22/2022]
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Guan X, Geng T, Silva P, Smith EJ. Mitochondrial DNA sequence and haplotype variation analysis in the chicken (Gallus gallus). ACTA ACUST UNITED AC 2007; 98:723-6. [PMID: 17986471 DOI: 10.1093/jhered/esm094] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Although it is known to be useful for certain genotype:phenotype assignments, our knowledge of the nature and extent of variation in the entire chicken (Gallus gallus) mitochondrial genome (mtGenome) is limited. Here, we used experimental and in silico tools to identify nucleotide variants in the mtGenome, including the coding and non-coding (D-loop) regions. The distribution of the experimentally identified mitochondrial DNA variants in meat- (broilers) and egg-type (White Leghorn) chickens was also assessed. A total of 113 single-nucleotide polymorphisms (SNPs) were identified. The in silico analysis revealed a total of 91 SNPs, with 70 in the coding region and 21 in the non-coding region. Of the 41 experimentally identified SNPs, 27 were in the D-loop. Together, the experimentally identified SNPs in the non-coding region formed 11 haplotypes, whereas the 14 SNPs in the coding region formed 6. Though, 9 of the D-loop region haplotypes were observed only in broilers, 3 of the 6 haplotypes from the coding region occurred at a significantly higher frequency in broilers. To our knowledge, this investigation represents the first whole-mtGenome scan for variation and an evaluation, though limited in sample size, of the haplotype distribution in meat- and egg-type populations, using the SNPs and haplotypes identified.
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Affiliation(s)
- Xiaojing Guan
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA 24061, USA
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23
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Yao YG, Bandelt HJ, Young NS. External contamination in single cell mtDNA analysis. PLoS One 2007; 2:e681. [PMID: 17668059 PMCID: PMC1930155 DOI: 10.1371/journal.pone.0000681] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2007] [Accepted: 06/19/2007] [Indexed: 12/31/2022] Open
Abstract
Background Mitochondrial DNA (mtDNA) variation in single hematopoietic cells, muscle fibers, oocytes, and from tiny amount of tumor tissues and degraded clinical specimens has been reported in many medical publications. External DNA contamination, notoriously difficult to avoid, threatens the integrity of such studies. Methodology/Principal Findings Employing a phylogenetic approach, we analyzed the geographic origins of mtDNA sequence anomalies observed during multiple studies of mtDNA sequence variation in a total of 7094 single hematopoietic cells. 40 events with irregular mtDNA patterns were detected: eight instances (from seven different haplotypes) could be traced to laboratory personnel; six cases were caused by sample cross-contamination. The sources of the remaining events could not be identified, and the anomalous sequence variation referred to matrilines from East Asia, Africa, or West Eurasia, respectively. These mtDNA sequence anomalies could be best explained by contamination. Conclusions Using the known world mtDNA phylogeny, we could distinguish the geographic origin of the anomalous mtDNA types, providing some useful information regarding the source of contamination. Our data suggest that routine mtDNA sequence analysis of laboratory personnel is insufficient to identify and eliminate all contaminants. A rate of 0.6% of external contamination in this study, while low, is not negligible: Unrecognized contaminants will be mistaken as evidence of remarkable somatic mutations associated with the development of cancer and other diseases. The effective contamination rate can increase by a factor of more than an order of magnitude in some studies that did not institute high standards. Our results are of particular relevance to mtDNA research in medicine, and such an approach should be adopted to maintain and improve quality control in single-cell analyses.
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Affiliation(s)
- Yong-Gang Yao
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, United States of America.
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Chuang LY, Yang CH, Cheng YH, Gu DL, Chang PL, Tsui KH, Chang HW. V-MitoSNP: visualization of human mitochondrial SNPs. BMC Bioinformatics 2006; 7:379. [PMID: 16907992 PMCID: PMC1564046 DOI: 10.1186/1471-2105-7-379] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2006] [Accepted: 08/15/2006] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mitochondrial single nucleotide polymorphisms (mtSNPs) constitute important data when trying to shed some light on human diseases and cancers. Unfortunately, providing relevant mtSNP genotyping information in mtDNA databases in a neatly organized and transparent visual manner still remains a challenge. Amongst the many methods reported for SNP genotyping, determining the restriction fragment length polymorphisms (RFLPs) is still one of the most convenient and cost-saving methods. In this study, we prepared the visualization of the mtDNA genome in a way, which integrates the RFLP genotyping information with mitochondria related cancers and diseases in a user-friendly, intuitive and interactive manner. The inherent problem associated with mtDNA sequences in BLAST of the NCBI database was also solved. DESCRIPTION V-MitoSNP provides complete mtSNP information for four different kinds of inputs: (1) color-coded visual input by selecting genes of interest on the genome graph, (2) keyword search by locus, disease and mtSNP rs# ID, (3) visualized input of nucleotide range by clicking the selected region of the mtDNA sequence, and (4) sequences mtBLAST. The V-MitoSNP output provides 500 bp (base pairs) flanking sequences for each SNP coupled with the RFLP enzyme and the corresponding natural or mismatched primer sets. The output format enables users to see the SNP genotype pattern of the RFLP by virtual electrophoresis of each mtSNP. The rate of successful design of enzymes and primers for RFLPs in all mtSNPs was 99.1%. The RFLP information was validated by actual agarose electrophoresis and showed successful results for all mtSNPs tested. The mtBLAST function in V-MitoSNP provides the gene information within the input sequence rather than providing the complete mitochondrial chromosome as in the NCBI BLAST database. All mtSNPs with rs number entries in NCBI are integrated in the corresponding SNP in V-MitoSNP. CONCLUSION V-MitoSNP is a web-based software platform that provides a user-friendly and interactive interface for mtSNP information, especially with regard to RFLP genotyping. Visual input and output coupled with integrated mtSNP information from MITOMAP and NCBI make V-MitoSNP an ideal and complete visualization interface for human mtSNPs association studies.
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Affiliation(s)
- Li-Yeh Chuang
- Department of Chemical Engineering, I-Shou University, 840, Taiwan
| | - Cheng-Hong Yang
- Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, 807, Taiwan
| | - Yu-Huei Cheng
- Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, 807, Taiwan
| | - De-Leung Gu
- Faculty of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
| | - Phei-Lang Chang
- Chang Gung Bioinformatics Center, Chang Gung Memorial Hospital, Chang Gung University, Taiwan
| | - Ke-Hung Tsui
- Chang Gung Bioinformatics Center, Chang Gung Memorial Hospital, Chang Gung University, Taiwan
| | - Hsueh-Wei Chang
- Faculty of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
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