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Huang C, Chen L, Li J, Ma J, Luo J, Lv Q, Xiao J, Gao P, Chai W, Li X, Zhang M, Hu F, Hu D, Qin P. Mitochondrial DNA Copy Number and Risk of Diabetes Mellitus and Metabolic Syndrome. J Clin Endocrinol Metab 2023; 109:e406-e417. [PMID: 37431585 DOI: 10.1210/clinem/dgad403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/12/2023]
Abstract
CONTEXT Mitochondrial DNA (mtDNA) plays a key role in diabetes mellitus and metabolic syndrome (MetS). An increasing number of studies have reported the association between mtDNA copy number (mtDNA-CN) and the risk of diabetes mellitus and MetS; however, the associations remain conflicted and a systematic review and meta-analysis on the association between mtDNA-CN and diabetes mellitus and MetS is lacking. OBJECTIVE We aimed to investigate the association of mtDNA-CN and diabetes mellitus and MetS using a systematic review and meta-analysis of observational studies. METHODS PubMed, EMBASE, and Web of Science were searched up to December 15, 2022. Random-effect models were used to summarize the relative risks (RRs) and 95% CIs. RESULTS A total of 19 articles were included in the systematic review and 6 articles (12 studies) in the meta-analysis involving 21 714 patients with diabetes (318 870 participants) and 5031 MetS (15 040 participants). Compared to the highest mtDNA-CN, the summary RR (95% CIs) for the lowest mtDNA-CN were 1.06 (95% CI, 1.01-1.12; I2 = 79.4%; n = 8) for diabetes (prospective study: 1.11 (1.02-1.21); I2 = 22.6%; n = 4; case-control: 1.27 (0.66-2.43); I2 = 81.8%; n = 2; cross-sectional: 1.01 (0.99-1.03); I2 = 74.7%; n = 2), and 1.03 (0.99-1.07; I2 = 70.6%; n = 4) for MetS (prospective: 2.87 (1.51-5.48); I2 = 0; n = 2; cross-sectional: 1.02 (1.01-1.04); I2 = 0; n = 2). CONCLUSION Decreased mtDNA-CN was associated with increased risk of diabetes mellitus and MetS when limited to prospective studies. More longitudinal studies are warranted.
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Affiliation(s)
- Cuihong Huang
- Center for Clinical Epidemiology and Evidence-based Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
- School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Lifang Chen
- Department of Cardiovascular Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Jiangtao Li
- Department of Cardiovascular Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Juanjuan Ma
- Center for Clinical Epidemiology and Evidence-based Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Jun Luo
- Department of Cardiovascular Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Qian Lv
- Department of Cardiovascular Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Jian Xiao
- Department of Cardiovascular Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Pan Gao
- Department of Neurology, Shenzhen University General Hospital, Shenzhen, 518000, Guangdong, China
| | - Wen Chai
- Department of Neurology, Shenzhen University General Hospital, Shenzhen, 518000, Guangdong, China
| | - Xu Li
- Department of Neurosurgery, The Second Affiliated Hospital of Shenzhen University, Shenzhen, 518000, Guangdong, China
| | - Ming Zhang
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, 518000, Guangdong, China
| | - Fulan Hu
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, 518000, Guangdong, China
| | - Dongsheng Hu
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, 518000, Guangdong, China
| | - Pei Qin
- Center for Clinical Epidemiology and Evidence-based Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
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Todosenko N, Khaziakhmatova O, Malashchenko V, Yurova K, Bograya M, Beletskaya M, Vulf M, Gazatova N, Litvinova L. Mitochondrial Dysfunction Associated with mtDNA in Metabolic Syndrome and Obesity. Int J Mol Sci 2023; 24:12012. [PMID: 37569389 PMCID: PMC10418437 DOI: 10.3390/ijms241512012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 07/22/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
Metabolic syndrome (MetS) is a precursor to the major health diseases associated with high mortality in industrialized countries: cardiovascular disease and diabetes. An important component of the pathogenesis of the metabolic syndrome is mitochondrial dysfunction, which is associated with tissue hypoxia, disruption of mitochondrial integrity, increased production of reactive oxygen species, and a decrease in ATP, leading to a chronic inflammatory state that affects tissues and organ systems. The mitochondrial AAA + protease Lon (Lonp1) has a broad spectrum of activities. In addition to its classical function (degradation of misfolded or damaged proteins), enzymatic activity (proteolysis, chaperone activity, mitochondrial DNA (mtDNA)binding) has been demonstrated. At the same time, the spectrum of Lonp1 activity extends to the regulation of cellular processes inside mitochondria, as well as outside mitochondria (nuclear localization). This mitochondrial protease with enzymatic activity may be a promising molecular target for the development of targeted therapy for MetS and its components. The aim of this review is to elucidate the role of mtDNA in the pathogenesis of metabolic syndrome and its components as a key component of mitochondrial dysfunction and to describe the promising and little-studied AAA + LonP1 protease as a potential target in metabolic disorders.
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Affiliation(s)
- Natalia Todosenko
- Center for Immunology and Cellular Biotechnology, Immanuel Kant Baltic Federal University, 236001 Kaliningrad, Russia; (N.T.); (O.K.); (V.M.); (K.Y.); (M.B.); (M.B.); (M.V.); (N.G.)
| | - Olga Khaziakhmatova
- Center for Immunology and Cellular Biotechnology, Immanuel Kant Baltic Federal University, 236001 Kaliningrad, Russia; (N.T.); (O.K.); (V.M.); (K.Y.); (M.B.); (M.B.); (M.V.); (N.G.)
| | - Vladimir Malashchenko
- Center for Immunology and Cellular Biotechnology, Immanuel Kant Baltic Federal University, 236001 Kaliningrad, Russia; (N.T.); (O.K.); (V.M.); (K.Y.); (M.B.); (M.B.); (M.V.); (N.G.)
| | - Kristina Yurova
- Center for Immunology and Cellular Biotechnology, Immanuel Kant Baltic Federal University, 236001 Kaliningrad, Russia; (N.T.); (O.K.); (V.M.); (K.Y.); (M.B.); (M.B.); (M.V.); (N.G.)
| | - Maria Bograya
- Center for Immunology and Cellular Biotechnology, Immanuel Kant Baltic Federal University, 236001 Kaliningrad, Russia; (N.T.); (O.K.); (V.M.); (K.Y.); (M.B.); (M.B.); (M.V.); (N.G.)
| | - Maria Beletskaya
- Center for Immunology and Cellular Biotechnology, Immanuel Kant Baltic Federal University, 236001 Kaliningrad, Russia; (N.T.); (O.K.); (V.M.); (K.Y.); (M.B.); (M.B.); (M.V.); (N.G.)
| | - Maria Vulf
- Center for Immunology and Cellular Biotechnology, Immanuel Kant Baltic Federal University, 236001 Kaliningrad, Russia; (N.T.); (O.K.); (V.M.); (K.Y.); (M.B.); (M.B.); (M.V.); (N.G.)
| | - Natalia Gazatova
- Center for Immunology and Cellular Biotechnology, Immanuel Kant Baltic Federal University, 236001 Kaliningrad, Russia; (N.T.); (O.K.); (V.M.); (K.Y.); (M.B.); (M.B.); (M.V.); (N.G.)
| | - Larisa Litvinova
- Center for Immunology and Cellular Biotechnology, Immanuel Kant Baltic Federal University, 236001 Kaliningrad, Russia; (N.T.); (O.K.); (V.M.); (K.Y.); (M.B.); (M.B.); (M.V.); (N.G.)
- Laboratory of Cellular and Microfluidic Technologies, Siberian State Medical University, 634050 Tomsk, Russia
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Alwehaidah MS, AlFadhli S, Al-Kafaji G. Leukocyte mitochondrial DNA copy number is a potential non-invasive biomarker for psoriasis. PLoS One 2022; 17:e0270714. [PMID: 35767552 PMCID: PMC9242485 DOI: 10.1371/journal.pone.0270714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 06/16/2022] [Indexed: 11/18/2022] Open
Abstract
Abnormalities in the mitochondria have been linked to psoriasis, a chronic immune-mediated inflammatory skin disease. The mitochondrial DNA (mtDNA) is present in thousands of copies per cell and altered mtDNA copy number (mtDNA-CN), a common indicator of mitochondrial function, has been proposed as a biomarker for several diseases including autoimmune diseases. In this case–control study, we investigated whether the mtDNA-CN is related to psoriasis, correlates with the disease duration and severity, and can serve as a disease biomarker. Relative mtDNA-CN as compared with nuclear DNA was measured by a quantitative real-time polymerase chain reaction in peripheral blood buffy coat samples from 56 patients with psoriasis and 44 healthy controls. The receiver operating characteristic (ROC) curve analysis was performed to evaluate the value of mtDNA-CN as a biomarker. We found that the mtDNA-CN was significantly decreased in patients with psoriasis compared to healthy controls (93.6±5.3 vs. 205±71; P = 0.04). Sub-group analyses with stratification of patients based on disease duration under or over 10 years and disease severity indicated that the mtDNA-CN was significantly lower in patients with longer disease duration (74±4.3 in disease duration >10 years vs. 79±8.3 in disease duration <10 years, P = 0.009), and higher disease severity (72±4.3 in moderate-to-severe index vs. 88.3 ± 6 in mild index, P = 0.017). Moreover, the mtDNA-CN was negatively correlated with the disease duration and disease severity (r = -0.36, P = 0.006; r = -0.41, P = 0.003 respectively). The ROC analysis of mtDNA-CN showed an area under the curve (AUC) of 0.84 (95% confidence interval: 0.69–0.98; P = 0.002) for differentiating patients from healthy controls. Our study suggests that low mtDNA-CN may be an early abnormality in psoriasis and associates with the disease progression. Our study also suggests that mtDNA-CN may be a novel blood-based biomarker for the early detection of psoriasis.
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Affiliation(s)
- Materah Salem Alwehaidah
- Faculty of Allied Health, Department of Medical Laboratory, Kuwait University, State of Kuwait
- * E-mail: ,
| | - Suad AlFadhli
- Faculty of Allied Health, Department of Medical Laboratory, Kuwait University, State of Kuwait
| | - Ghada Al-Kafaji
- Department of Molecular Medicine and Al-Jawhara Centre for Molecular Medicine, Genetics, and Inherited Disorders, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Kingdom of Bahrain
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Panov A, Mayorov VI, Dikalov S. Metabolic Syndrome and β-Oxidation of Long-Chain Fatty Acids in the Brain, Heart, and Kidney Mitochondria. Int J Mol Sci 2022; 23:4047. [PMID: 35409406 PMCID: PMC9000033 DOI: 10.3390/ijms23074047] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 02/04/2023] Open
Abstract
We present evidence that metabolic syndrome (MetS) represents the postreproductive stage of the human postembryonic ontogenesis. Accordingly, the genes governing this stage experience relatively weak evolutionary selection pressure, thus representing the metabolic phenotype of distant ancestors with β-oxidation of long-chain fatty acids (FAs) as the primary energy source. Mitochondria oxidize at high-rate FAs only when succinate, glutamate, or pyruvate are present. The heart and brain mitochondria work at a wide range of functional loads and possess an intrinsic inhibition of complex II to prevent oxidative stress at periods of low functional activity. Kidney mitochondria constantly work at a high rate and lack inhibition of complex II. We suggest that in people with MetS, oxidative stress is the central mechanism of the heart and brain pathologies. Oxidative stress is a secondary pathogenetic mechanism in the kidney, while the primary mechanisms are kidney hypoxia caused by persistent hyperglycemia and hypertension. Current evidence suggests that most of the nongenetic pathologies associated with MetS originate from the inconsistencies between the metabolic phenotype acquired after the transition to the postreproductive stage and excessive consumption of food rich in carbohydrates and a sedentary lifestyle.
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Affiliation(s)
- Alexander Panov
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31201, USA;
| | - Vladimir I. Mayorov
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31201, USA;
| | - Sergey Dikalov
- Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232, USA;
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Chang CC, Chen PS, Lin JR, Chen YA, Liu CS, Lin TT, Chang HH. Mitochondrial DNA Copy Number Is Associated With Treatment Response and Cognitive Function in Euthymic Bipolar Patients Receiving Valproate. Int J Neuropsychopharmacol 2022; 25:525-533. [PMID: 34979555 PMCID: PMC9352174 DOI: 10.1093/ijnp/pyab095] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 12/20/2021] [Accepted: 01/02/2022] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Bipolar disorder (BD) is associated with cognitive impairment and mitochondrial dysfunction. However, the associations among mitochondrial DNA copy number (MCN), treatment response, and cognitive function remain elusive in BD patients. METHODS Sixty euthymic BD patients receiving valproate (VPA) and 66 healthy controls from the community were recruited. The indices of metabolic syndrome (MetS) were measured. Quantitative polymerase chain reaction analysis of blood leukocytes was used to measure the MCN. Cognitive function was measured by calculating perseverative errors and completed categories on the Wisconsin Card Sorting Test (WCST). The VPA treatment response was measured using the Alda scale. RESULTS BD patients had significantly higher MCN, triglyceride, and C-reactive protein (CRP) levels, waist circumference, and worse performance on the WCST than the controls. Regression models showed that BD itself and the VPA concentration exerted significant effects on increased MCN levels. Moreover, the receiver operating characteristic curve analysis showed that an MCN of 2.05 distinguished VPA responders from nonresponders, with an area under the curve of 0.705 and a sensitivity and specificity of 0.529 and 0.816, respectively. An MCN level ≥2.05 was associated with 5.39 higher odds of being a VPA responder (P = .006). BD patients who were stratified into the high-MCN group had a higher VPA response rate, better WCST performance, lower CRP level, and less MetS. CONCLUSIONS The study suggests a link between the peripheral MCN and cognitive function in BD patients. As an inflammatory status, MetS might modulate this association.
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Affiliation(s)
| | | | - Jhih-Rong Lin
- Institute of Clinical Pharmacy and Pharmaceutical Sciences College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yi-An Chen
- Institute of Clinical Pharmacy and Pharmaceutical Sciences College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chin-San Liu
- Vascular and Genomic Research Center, Changhua Christian Hospital, Changhua, Taiwan,Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Ta-Tsung Lin
- Vascular and Genomic Research Center, Changhua Christian Hospital, Changhua, Taiwan
| | - Hui Hua Chang
- Correspondence: Hui Hua Chang, PhD, Institute of Clinical Pharmacy and Pharmaceutical Sciences, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan ()
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Agius R, Pace NP, Fava S. Reduced leukocyte mitochondrial copy number in metabolic syndrome and metabolically healthy obesity. Front Endocrinol (Lausanne) 2022; 13:886957. [PMID: 35957819 PMCID: PMC9357898 DOI: 10.3389/fendo.2022.886957] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 06/29/2022] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVE This study aimed to investigate the associations between peripheral blood leukocyte mitochondrial copy number, metabolic syndrome, and adiposity-related body composition phenotypes in a high prevalence population. METHODS A single center cross-sectional study was conducted, consisting of 521 middle-aged subjects of Maltese-Caucasian ethnicity. Participants were stratified according to the presence of metabolic syndrome and different metabolic health definitions based on NCEP-ATP III criteria. Relative leukocyte mitochondrial DNA copy number was determined by quantitative polymerase chain reaction and corrected for leukocyte and platelet count. The associations between mitochondrial copy number and metabolic syndrome components was evaluated and adjusted for age and gender. RESULTS Significant negative correlations between mtDNA copy number and BMI, waist circumference, triglyceride levels, fasting plasma glucose, HbA1c, HOMA-IR and hsCRP were observed, along with a positive correlation with HDL-C levels. Mitochondrial copy number was lower in individuals with metabolic syndrome. When compared to metabolically healthy normal weight subjects, a reduction in mtDNA copy number was observed in both the metabolically healthy and unhealthy obese categories. CONCLUSION Our data supports the association between reduced leukocyte mtDNA copy number, obesity, and metabolic syndrome. This investigation expands on the spectrum of associations between mtDNA copy number and metabolic phenotypes in different populations and underpins the role of mitochondrial dysfunction in the development and progression of metabolic syndrome and its components.
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Affiliation(s)
- Rachel Agius
- Faculty of Medicine and Surgery, University of Malta, Msida, Malta
- Department of Medicine, Mater Dei Hospital, Msida, Malta
| | - Nikolai Paul Pace
- Faculty of Medicine and Surgery, University of Malta, Msida, Malta
- Centre for Molecular Medicine and Biobanking, University of Malta, Msida, Malta
- *Correspondence: Nikolai Paul Pace,
| | - Stephen Fava
- Faculty of Medicine and Surgery, University of Malta, Msida, Malta
- Department of Medicine, Mater Dei Hospital, Msida, Malta
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Association of Mitochondrial DNA Copy Number and Telomere Length with Prevalent and Incident Cancer and Cancer Mortality in Women: A Prospective Swedish Population-Based Study. Cancers (Basel) 2021; 13:cancers13153842. [PMID: 34359743 PMCID: PMC8345403 DOI: 10.3390/cancers13153842] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 12/09/2022] Open
Abstract
Changes in mitochondrial DNA copy number (mtDNA-CN) and telomere length have, separately, been proposed as risk factors for various cancer types. However, those results are conflicting. Here, mtDNA-CN and relative telomere length were measured in 3225 middle-aged women included in a large population-based prospective cohort. The baseline mtDNA-CN in patients with prevalent breast cancer was significantly higher (12.39 copies/µL) than cancer-free individuals. During an average of 15.2 years of follow-up, 520 patients were diagnosed with cancer. Lower mtDNA-CN was associated with decreased risk of genital organ cancer (hazard ratio (HR), 0.84), and shorter telomere length was associated with increased risk of urinary system cancer (HR, 1.79). Furthermore, mtDNA-CN was inversely associated with all-cause (HR, 1.20) and cancer-specific mortality (HR, 1.21) when considering all cancer types. Surprisingly, shorter telomere length was associated with decreased risk of cancer-specific mortality when considering all cancer types (HR, 0.85). Finally, lower mtDNA-CN and shorter telomere length were associated with increased risk of both all-cause and cancer-specific mortality in genital organ cancer patients. In this study population, we found that mtDNA-CN and telomere length were significantly associated with prevalent and incident cancer and cancer mortality. However, these associations were cancer type specific and need further investigation.
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Fazzini F, Lamina C, Raftopoulou A, Koller A, Fuchsberger C, Pattaro C, Del Greco FM, Döttelmayer P, Fendt L, Fritz J, Meiselbach H, Schönherr S, Forer L, Weissensteiner H, Pramstaller PP, Eckardt K, Hicks AA, Kronenberg F. Association of mitochondrial DNA copy number with metabolic syndrome and type 2 diabetes in 14 176 individuals. J Intern Med 2021; 290:190-202. [PMID: 33453124 PMCID: PMC8359248 DOI: 10.1111/joim.13242] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 11/24/2020] [Accepted: 12/14/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Mitochondria play an important role in cellular metabolism, and their dysfunction is postulated to be involved in metabolic disturbances. Mitochondrial DNA is present in multiple copies per cell. The quantification of mitochondrial DNA copy number (mtDNA-CN) might be used to assess mitochondrial dysfunction. OBJECTIVES We aimed to investigate the cross-sectional association of mtDNA-CN with type 2 diabetes and the potential mediating role of metabolic syndrome. METHODS We examined 4812 patients from the German Chronic Kidney Disease (GCKD) study and 9364 individuals from the Cooperative Health Research in South Tyrol (CHRIS) study. MtDNA-CN was measured in whole blood using a plasmid-normalized qPCR-based assay. RESULTS In both studies, mtDNA-CN showed a significant correlation with most metabolic syndrome parameters: mtDNA-CN decreased with increasing number of metabolic syndrome components. Furthermore, individuals with low mtDNA-CN had significantly higher odds of metabolic syndrome (OR = 1.025; 95% CI = 1.011-1.039, P = 3.19 × 10-4 , for each decrease of 10 mtDNA copies) and type 2 diabetes (OR = 1.027; 95% CI = 1.012-1.041; P = 2.84 × 10-4 ) in a model adjusted for age, sex, smoking and kidney function in the meta-analysis of both studies. Mediation analysis revealed that the association of mtDNA-CN with type 2 diabetes was mainly mediated by waist circumference in the GCKD study (66%) and by several metabolic syndrome parameters, especially body mass index and triglycerides, in the CHRIS study (41%). CONCLUSIONS Our data show an inverse association of mtDNA-CN with higher risk of metabolic syndrome and type 2 diabetes. A major part of the total effect of mtDNA-CN on type 2 diabetes is mediated by obesity parameters.
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Affiliation(s)
- F. Fazzini
- From theDepartment of Genetics and PharmacologyInstitute of Genetic EpidemiologyMedical University of InnsbruckInnsbruckAustria
| | - C. Lamina
- From theDepartment of Genetics and PharmacologyInstitute of Genetic EpidemiologyMedical University of InnsbruckInnsbruckAustria
| | - A. Raftopoulou
- Eurac ResearchInstitute for BiomedicineAffiliated Institute of the University of LübeckBolzanoItaly
| | - A. Koller
- From theDepartment of Genetics and PharmacologyInstitute of Genetic EpidemiologyMedical University of InnsbruckInnsbruckAustria
| | - C. Fuchsberger
- Eurac ResearchInstitute for BiomedicineAffiliated Institute of the University of LübeckBolzanoItaly
| | - C. Pattaro
- Eurac ResearchInstitute for BiomedicineAffiliated Institute of the University of LübeckBolzanoItaly
| | - F. M. Del Greco
- Eurac ResearchInstitute for BiomedicineAffiliated Institute of the University of LübeckBolzanoItaly
| | - P. Döttelmayer
- From theDepartment of Genetics and PharmacologyInstitute of Genetic EpidemiologyMedical University of InnsbruckInnsbruckAustria
| | - L. Fendt
- From theDepartment of Genetics and PharmacologyInstitute of Genetic EpidemiologyMedical University of InnsbruckInnsbruckAustria
| | - J. Fritz
- Department of Medical StatisticsInformatics and Health EconomicsMedical University of InnsbruckInnsbruckAustria
- Department of Integrative PhysiologyUniversity of Colorado BoulderBoulderCOUSA
| | - H. Meiselbach
- Department of Nephrology and HypertensionFriedrich‐Alexander Universität Erlangen‐Nürnberg (FAU)ErlangenGermany
| | - S. Schönherr
- From theDepartment of Genetics and PharmacologyInstitute of Genetic EpidemiologyMedical University of InnsbruckInnsbruckAustria
| | - L. Forer
- From theDepartment of Genetics and PharmacologyInstitute of Genetic EpidemiologyMedical University of InnsbruckInnsbruckAustria
| | - H. Weissensteiner
- From theDepartment of Genetics and PharmacologyInstitute of Genetic EpidemiologyMedical University of InnsbruckInnsbruckAustria
| | - P. P. Pramstaller
- Eurac ResearchInstitute for BiomedicineAffiliated Institute of the University of LübeckBolzanoItaly
| | - K.‐U. Eckardt
- Department of Nephrology and HypertensionFriedrich‐Alexander Universität Erlangen‐Nürnberg (FAU)ErlangenGermany
- Department of Nephrology and Medical Intensive CareCharité – Universitätsmedizin BerlinBerlinGermany
| | - A. A. Hicks
- Eurac ResearchInstitute for BiomedicineAffiliated Institute of the University of LübeckBolzanoItaly
| | - F. Kronenberg
- From theDepartment of Genetics and PharmacologyInstitute of Genetic EpidemiologyMedical University of InnsbruckInnsbruckAustria
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Yang K, Forman MR, Monahan PO, Graham BH, Chan AT, Zhang X, De Vivo I, Giovannucci EL, Tabung FK, Nan H. Insulinemic Potential of Lifestyle Is Inversely Associated with Leukocyte Mitochondrial DNA Copy Number in US White Adults. J Nutr 2020; 150:2156-2163. [PMID: 32492151 PMCID: PMC7398789 DOI: 10.1093/jn/nxaa146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 03/18/2020] [Accepted: 05/01/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Poor lifestyles have been linked to insulin insensitivity/hyperinsulinemia, which may contribute to downstream changes such as inflammation and oxidative damage and the development of chronic diseases. As a biomarker of intracellular oxidative stress, leukocyte mitochondrial DNA copy number (mtDNA-CN) has been related to lifestyle factors including diet and weight. No epidemiologic study has examined the relation between combined insulinemic potential of lifestyle and mtDNA-CN. OBJECTIVES Our aim was to examine the association between Empirical Lifestyle Index for Hyperinsulinemia (ELIH) and leukocyte mtDNA-CN in US men and women. METHODS This cross-sectional analysis included 2835 white adults without cancers, diabetes, or cardiovascular disease at blood collection, including 2160 women from the Nurses' Health Study and 675 men from the Health Professionals Follow-Up Study. ELIH is an index based on plasma C-peptide that characterizes the insulinemic potential of lifestyle (diet, body weight, and physical activity). Relative mtDNA-CN in peripheral blood leukocytes was measured by qPCR-based assay. RESULTS We found a significant inverse association between ELIH and mtDNA-CN. In multivariable-adjusted linear models, absolute least squares means ± SDs of mtDNA-CN z score across ELIH quintiles in women were as follows: Q1: 0.14 ± 0.05; Q2: 0.04 ± 0.06; Q3: 0.008 ± 0.05; Q4: 0.01 ± 0.05; and Q5: -0.06 ± 0.05 (P-trend = 0.006). Means ± SDs in men were as follows: Q1: 0.25 ± 0.09; Q2: 0.23 ± 0.09; Q3: 0.07 ± 0.09; Q4: 0.02 ± 0.09; and Q5: -0.04 ± 0.09 (P-trend = 0.007). Means ± SDs in all participants were as follows: Q1: 0.16 ± 0.05; Q2: 0.07 ± 0.05; Q3: 0.01 ± 0.05; Q4: 0.01 ± 0.05; and Q5: -0.05 ± 0.05 (P-trend = 0.0004). CONCLUSIONS Hyperinsulinemic lifestyles (i.e., higher ELIH) were associated with lower leukocyte mtDNA-CN among subjects without major diseases, suggesting that the difference in lifestyle insulinemic potential may be related to excessive oxidative stress damage.
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Affiliation(s)
- Keming Yang
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA,Department of Epidemiology, Richard M. Fairbanks School of Public Health, Indiana University, Indianapolis, IN, USA
| | - Michele R Forman
- Department of Nutrition Science, College of Health and Human Science, Purdue Center for Cancer Research, Purdue University, West Lafayette, IN, USA
| | - Patrick O Monahan
- Department of Biostatistics, School of Medicine and Richard M. Fairbanks School of Public Health, Indiana University, Indianapolis, IN, USA
| | - Brett H Graham
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Andrew T Chan
- Clinical and Translational Epidemiology Unit and Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA,Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Xuehong Zhang
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA,Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Immaculata De Vivo
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Edward L Giovannucci
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA,Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Fred K Tabung
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA,Department of Internal Medicine, The Ohio State University College of Medicine and Comprehensive Cancer Center, Columbus, OH, USA,Address correspondence to FKT (e-mail: )
| | - Hongmei Nan
- Department of Epidemiology, Richard M. Fairbanks School of Public Health, Indiana University, Indianapolis, IN, USA,Department of Global Health, Richard M. Fairbanks School of Public Health, Indiana University, Indianapolis, IN, USA,IU Melvin and Bren Simon Cancer Center, Indiana University, Indianapolis, IN, USA,Address correspondence to HN (e-mail: )
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10
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Mitochondrial DNA content and deletion ratio are associated with metabolic syndrome in a general population exposed to pesticide. Mol Cell Toxicol 2020. [DOI: 10.1007/s13273-020-00079-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Yang XJ, Tian S, Ma QH, Sun HP, Xu Y, Pan CW. Leukocyte-related parameters in older adults with metabolic syndrome. Endocrine 2020; 68:312-319. [PMID: 32140984 DOI: 10.1007/s12020-020-02243-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 02/24/2020] [Indexed: 12/11/2022]
Abstract
PURPOSE We aimed to examine the association between leukocyte-related parameters and the risk of metabolic syndrome (MetS) in community-dwelling older Chinese adults, with a special focus on assessing the diagnostic ability of leukocyte-related parameters in detecting MetS and the potential interaction effect of sex in the leukocyte-MetS relationship. METHODS Study sample was from the Weitang Geriatric Diseases Study, which included 4579 individuals aged 60 years or above. MetS was diagnosed based on the Adult Treatment Panel III criteria. Leukocyte-related parameters were assessed using an automated hematology analyzer. RESULTS The adjusted odds ratio (95% confidence interval (CI)) of MetS for the highest quartile of leukocyte-related parameters (leukocyte, lymphocyte, neutrophil, monocyte, eosinophil, and basophil), when compared with the lowest quartile were 2.87 (2.30, 3.59), 2.69 (2.15, 3.36), 2.09 (1.67, 2.62), 2.12 (1.71, 2.64), 1.62 (1.31, 2.00), and 1.36 (1.11, 1.65), respectively. Adding leukocyte, lymphocyte, monocyte, and neutrophil to a model containing conventional risk factors improved risk prediction for MetS. Furthermore, significant interactions between leukocyte, monocyte, neutrophil, and sex on MetS were observed (all P value for interaction <0.01). CONCLUSION The numbers of total leukocytes, lymphocyte, monocyte, neutrophil, and eosinophil counts were elevated in older adults with MetS, suggesting that leukocyte-related parameters may be meaningful biomarkers for MetS. Adding leukocyte-related parameters to the conventional models increased the ability of predicting MetS among older adults. These parameters may be useful biomarkers for further risk appraisal of MetS in older adults.
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Affiliation(s)
- Xue-Jiao Yang
- School of Public Health, Medical College of Soochow University, Suzhou, China
| | - Shun Tian
- School of Public Health, Medical College of Soochow University, Suzhou, China
| | - Qing-Hua Ma
- The 3rd People's Hospital of Xiangcheng District, Suzhou, China
| | - Hong-Peng Sun
- School of Public Health, Medical College of Soochow University, Suzhou, China
| | - Yong Xu
- School of Public Health, Medical College of Soochow University, Suzhou, China
| | - Chen-Wei Pan
- School of Public Health, Medical College of Soochow University, Suzhou, China.
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12
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Wu S, Li X, Meng S, Fung T, Chan AT, Liang G, Giovannucci E, De Vivo I, Lee JH, Nan H. Fruit and vegetable consumption, cigarette smoke, and leukocyte mitochondrial DNA copy number. Am J Clin Nutr 2019; 109:424-432. [PMID: 30721920 PMCID: PMC6367969 DOI: 10.1093/ajcn/nqy286] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 09/21/2018] [Indexed: 12/11/2022] Open
Abstract
Background Mitochondrial dysfunction is an important component of the aging process and has been implicated in the development of many human diseases. Mitochondrial DNA copy number (mtDNAcn), an indirect biomarker of mitochondrial function, is sensitive to oxidative damage. Few population-based studies have investigated the impact of fruit and vegetable consumption and cigarette smoke (2 major sources of exogenous antioxidants and oxidants) on leukocyte mtDNAcn. Objectives We investigated the association between fruit and vegetable consumption, cigarette smoke, and leukocyte mtDNAcn based on data from the Nurses' Health Study (NHS). Methods Data from 2769 disease-free women in the NHS were used to examine the cross-sectional associations between dietary sources of antioxidants, cigarette smoke, and leukocyte mtDNAcn. In vitro cell-based experiments were conducted to support the findings from the population-based study. Results In the multivariable-adjusted model, both whole-fruit consumption and intake of flavanones (a group of antioxidants abundant in fruit) were positively associated with leukocyte mtDNAcn (P-trend = 0.005 and 0.02, respectively), whereas pack-years of smoking and smoking duration were inversely associated with leukocyte mtDNAcn (P-trend = 0.01 and 0.007, respectively). These findings are supported by in vitro cell-based experiments showing that the administration of naringin, a major flavanone in fruit, led to a substantial increase in mtDNAcn in human leukocytes, whereas exposure to nicotine-derived nitrosamine ketone, a key carcinogenic ingredient of cigarette smoke, resulted in a significant decrease in mtDNAcn of cells (all P < 0.05). Further in vitro studies showed that alterations in leukocyte mtDNAcn were functionally linked to the modulation of mitochondrial biogenesis and function. Conclusions Fruit consumption and intake of dietary flavanones were associated with increased leukocyte mtDNAcn, whereas cigarette smoking was associated with decreased leukocyte mtDNAcn, which is a promising biomarker for oxidative stress-related health outcomes.
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Affiliation(s)
- Shaowei Wu
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, China
| | - Xin Li
- Department of Epidemiology, Richard M Fairbanks School of Public Health, Indiana University, Indianapolis, IN
| | | | - Teresa Fung
- Nutrition, Harvard TH Chan School of Public Health, Boston, MA
- Department of Nutrition, Simmons College, Boston, MA
| | - Andrew T Chan
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Geyu Liang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Edward Giovannucci
- Departments of Epidemiology
- Nutrition, Harvard TH Chan School of Public Health, Boston, MA
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Immaculata De Vivo
- Departments of Epidemiology
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Jin Hyup Lee
- Department of Food and Biotechnology
- Institutes of Natural Sciences, Korea University, Sejong, Republic of Korea
| | - Hongmei Nan
- Department of Epidemiology, Richard M Fairbanks School of Public Health, Indiana University, Indianapolis, IN
- Indiana University Melvin and Bren Simon Cancer Center, Indianapolis, IN
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13
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Depression, telomeres and mitochondrial DNA: between- and within-person associations from a 10-year longitudinal study. Mol Psychiatry 2018; 23:850-857. [PMID: 28348385 DOI: 10.1038/mp.2017.48] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 12/21/2016] [Accepted: 01/17/2017] [Indexed: 12/16/2022]
Abstract
Alterations in cellular aging, indexed by leukocyte telomere length (LTL) and mitochondrial DNA copy number (mtDNAcn), might partly account for the increased health risks in persons with depression. Although some studies indeed found cross-sectional associations of depression with LTL and mtDNAcn, the longitudinal associations remain unclear. This 10-year longitudinal study examined between- and within-person associations of depressive symptoms with LTL and mtDNAcn in a large community sample. Data are from years 15, 20 and 25 follow-up evaluations in 977 subjects from the Coronary Artery Risk Development in Young Adults study. Depressive symptoms (years 15, 20, 25) were assessed with the Center for Epidemiologic Studies Depression (CES-D) scale; LTL (years 15, 20, 25) and mtDNAcn (years 15, 25) were measured in whole blood by quantitative PCR. With mixed-model analyses, we explored between- and within-person associations between CES-D scores and cellular aging markers. Results showed that high levels of depressive symptomatology throughout the 10-year time span was associated with shorter average LTL over 10 years (B=-4.2; P=0.014) after covarying for age, sex, race and education. However, no within-person association was found between depressive symptoms and LTL at each year (B=-0.8; P=0.548). Further, we found no between-person (B=-0.2; P=0.744) or within-person (B=0.4; P=0.497) associations between depressive symptomatology and mtDNAcn. Our results provide evidence for a long-term, between-person relationship of depressive symptoms with LTL, rather than a dynamic and direct within-person relationship. In this study, we found no evidence for an association between depressive symptoms and mtDNAcn.
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14
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Guyatt AL, Burrows K, Guthrie PAI, Ring S, McArdle W, Day INM, Ascione R, Lawlor DA, Gaunt TR, Rodriguez S. Cardiometabolic phenotypes and mitochondrial DNA copy number in two cohorts of UK women. Mitochondrion 2018; 39:9-19. [PMID: 28818596 PMCID: PMC5832987 DOI: 10.1016/j.mito.2017.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 06/06/2017] [Accepted: 08/10/2017] [Indexed: 12/14/2022]
Abstract
The mitochondrial genome is present at variable copy number between individuals. Mitochondria are vulnerable to oxidative stress, and their dysfunction may be associated with cardiovascular disease. The association of mitochondrial DNA copy number with cardiometabolic risk factors (lipids, glycaemic traits, inflammatory markers, anthropometry and blood pressure) was assessed in two independent cohorts of European origin women, one in whom outcomes were measured at mean (SD) age 30 (4.3) years (N=2278) and the second at 69.4 (5.5) years (N=2872). Mitochondrial DNA copy number was assayed by quantitative polymerase chain reaction. Associations were adjusted for smoking, sociodemographic status, laboratory factors and white cell traits. Out of a total of 12 outcomes assessed in both cohorts, mitochondrial DNA copy number showed little or no association with the majority (point estimates were close to zero and nearly all p-values were >0.01). The strongest evidence was for an inverse association in the older cohort with insulin (standardised beta [95%CI]: -0.06, [-0.098, -0.022], p=0.002), but this association did not replicate in the younger cohort. Our findings do not provide support for variation in mitochondrial DNA copy number having an important impact on cardio-metabolic risk factors in European origin women.
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Affiliation(s)
- Anna L Guyatt
- MRC Integrative Epidemiology Unit, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK; School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK
| | - Kimberley Burrows
- MRC Integrative Epidemiology Unit, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK; School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK
| | - Philip A I Guthrie
- School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK
| | - Sue Ring
- MRC Integrative Epidemiology Unit, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK; School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK
| | - Wendy McArdle
- MRC Integrative Epidemiology Unit, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK; School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK
| | - Ian N M Day
- School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK
| | - Raimondo Ascione
- Bristol Heart Institute, School of Clinical Sciences, University of Bristol, Bristol, UK
| | - Debbie A Lawlor
- MRC Integrative Epidemiology Unit, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK; School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK
| | - Tom R Gaunt
- MRC Integrative Epidemiology Unit, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK; School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK
| | - Santiago Rodriguez
- MRC Integrative Epidemiology Unit, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK; School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol BS8 2BN, UK.
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15
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Lien LM, Chiou HY, Yeh HL, Chiu SY, Jeng JS, Lin HJ, Hu CJ, Hsieh FI, Wei YH. Significant Association Between Low Mitochondrial DNA Content in Peripheral Blood Leukocytes and Ischemic Stroke. J Am Heart Assoc 2017; 6:JAHA.117.006157. [PMID: 29151031 PMCID: PMC5721740 DOI: 10.1161/jaha.117.006157] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Background Cumulative evidence has shown that low mitochondrial DNA (mtDNA) content is related to elevated oxidative stress and atherosclerosis, which play important roles in ischemic stroke. The objective of this study was to explore the association between mtDNA content in peripheral blood leukocytes and ischemic stroke. Methods and Results A total of 350 patients with first‐ever ischemic stroke and 350 healthy controls were recruited in this case‐control study. The mtDNA content in peripheral blood leukocytes was determined by quantitative real‐time polymerase chain reaction. The levels of oxidized glutathione, reduced glutathione, and 8‐hydroxy‐2′‐deoxyguanosine were measured by ELISA kits. Multivariate logistic regression models were used to analyze the relationship between mtDNA content in peripheral blood leukocytes and ischemic stroke. Our results show that mtDNA content of patients with ischemic stroke was notably lower compared with controls. A significant association was found between low mtDNA content and ischemic stroke. Furthermore, significant interactions were identified between low mtDNA and proven risk factors in patients with ischemic stroke. The levels of oxidized glutathione and 8‐hydroxy‐2′‐deoxyguanosine were significantly greater in patients with ischemic stroke compared with controls. Conclusions Our results demonstrate that low mtDNA content in peripheral blood leukocytes is associated with ischemic stroke. The relationship of low mtDNA content and ischemic stroke was particularly notable in individuals who had low mtDNA content combined with diabetes mellitus, metabolic syndrome, or cigarette smoking. Oxidative stress may be one of the contributory factors to decreased mtDNA content in patients with ischemic stroke.
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Affiliation(s)
- Li-Ming Lien
- Department of Neurology, Shin-Kong WHS Memorial Hospital, Taipei, Taiwan.,School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hung-Yi Chiou
- School of Public Health, College of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Hsu-Ling Yeh
- Department of Neurology, Shin-Kong WHS Memorial Hospital, Taipei, Taiwan.,School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Shang-Yen Chiu
- School of Public Health, College of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Jiann-Shing Jeng
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
| | - Huey-Juan Lin
- Department of Neurology, Chi-Mei Medical Center, Tainan, Taiwan
| | - Chaur-Jong Hu
- School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Department of Neurology, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Fang-I Hsieh
- School of Public Health, College of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Yau-Huei Wei
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan.,Center for Mitochondrial Medicine and Free Radical Research, Changhua Christian Hospital, Changhua City, Taiwan
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16
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Kim JY, Choi J, Park I, Huh J, Son JW, Kim K, Park KS, Cha SK, Sohn J, Jung DH, Koh SB. A prospective study of leucocyte mitochondrial DNA content and deletion in association with the metabolic syndrome. DIABETES & METABOLISM 2017; 43:280-283. [DOI: 10.1016/j.diabet.2016.09.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 09/25/2016] [Indexed: 01/07/2023]
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17
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Alegría-Torres JA, Velázquez-Villafaña M, López-Gutiérrez JM, Chagoyán-Martínez MM, Rocha-Amador DO, Costilla-Salazar R, García-Torres L. Association of Leukocyte Telomere Length and Mitochondrial DNA Copy Number in Children from Salamanca, Mexico. Genet Test Mol Biomarkers 2016; 20:654-659. [PMID: 27622310 DOI: 10.1089/gtmb.2016.0176] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
AIM The purpose of this study was to determine if there is a correlation between telomere length (TL) and mitochondrial DNA copy number (mtDNAcn) in children. METHODS Leukocyte TL and mtDNAcn were measured by real-time PCR in 98 Mexican children 6-12 years of age from Salamanca, México. RESULTS A positive association was found between TL and mtDNAcn after a natural log transformation (Pearson correlation r = 0.72; p < 0.0001). No correlation between age and body mass index (BMI) biomarkers was found, and no differences according to sex were observed. After adjustment for these variables, a linear regression model showed an association between TL and mtDNAcn (β = 0.739, 95% confidence interval 0.594; 0.885, p < 0.0001). CONCLUSIONS A strong positive correlation between TL and mtDNAcn was found in the study population; age, sex, and BMI seemed to have no effect on this correlation.
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Affiliation(s)
- Jorge Alejandro Alegría-Torres
- 1 División de Ciencias Naturales y Exactas, Departamento de Farmacia, Campus Guanajuato, Universidad de Guanajuato , Guanajuato, México .,2 Laboratorio de Investigación Molecular en Nutrición, LIMON, Universidad del Centro de México UCEM , San Luis Potosí, México
| | - Marion Velázquez-Villafaña
- 1 División de Ciencias Naturales y Exactas, Departamento de Farmacia, Campus Guanajuato, Universidad de Guanajuato , Guanajuato, México
| | - Juan Manuel López-Gutiérrez
- 3 División de Ciencias de la Vida, Departamento de Ciencias Ambientales, Universidad de Guanajuato , Guanajuato, México
| | - Marcela M Chagoyán-Martínez
- 4 Unidad Interdisciplinaria de Ingeniería, Campus Guanajuato, Instituto Politécnico Nacional , Silao, Guanajuato, México
| | - Diana O Rocha-Amador
- 1 División de Ciencias Naturales y Exactas, Departamento de Farmacia, Campus Guanajuato, Universidad de Guanajuato , Guanajuato, México
| | - Rogelio Costilla-Salazar
- 3 División de Ciencias de la Vida, Departamento de Ciencias Ambientales, Universidad de Guanajuato , Guanajuato, México
| | - Lizeth García-Torres
- 2 Laboratorio de Investigación Molecular en Nutrición, LIMON, Universidad del Centro de México UCEM , San Luis Potosí, México
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18
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Effects of ginseng on peripheral blood mitochondrial DNA copy number and hormones in men with metabolic syndrome: A randomized clinical and pilot study. Complement Ther Med 2016; 24:40-6. [DOI: 10.1016/j.ctim.2015.12.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 08/14/2015] [Accepted: 12/01/2015] [Indexed: 12/31/2022] Open
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19
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Bersani FS, Morley C, Lindqvist D, Epel ES, Picard M, Yehuda R, Flory J, Bierer LM, Makotkine I, Abu-Amara D, Coy M, Reus VI, Lin J, Blackburn EH, Marmar C, Wolkowitz OM, Mellon SH. Mitochondrial DNA copy number is reduced in male combat veterans with PTSD. Prog Neuropsychopharmacol Biol Psychiatry 2016; 64:10-7. [PMID: 26120081 DOI: 10.1016/j.pnpbp.2015.06.012] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 06/21/2015] [Accepted: 06/23/2015] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Mitochondrial abnormalities may be involved in PTSD, although few studies have examined this. Mitochondrial DNA copy number (mtDNAcn) in blood cells is an emerging systemic index of mitochondrial biogenesis and function. The present study assessed mtDNAcn in male combat-exposed veterans with PTSD compared to those without PTSD as well as its correlation with clinical scales. METHODS mtDNAcn was assessed with a TaqMan multiplex assay in granulocytes of 43 male combat veterans with (n=43) or without (n=44) PTSD. Twenty of the PTSD subjects had co-morbid major depressive disorder (MDD). The Clinician Administered PTSD Scale (CAPS), the Positive and Negative Affect Schedule (PANAS), the Early Trauma Inventory (ETI) and the Beck Depression Inventory II (BDI-II) were used for the clinical assessments. All analyses were corrected for age and BMI. RESULTS mtDNAcn was significantly lower in subjects with PTSD (p<0.05). Within the PTSD group, those with moderate PTSD symptom severity had relatively higher mtDNAcn than those with mild or severe symptoms (p<0.01). Within the PTSD group, mtDNAcn was positively correlated with PANAS positive subscale ratings (p<0.01) but was not significantly correlated with PANAS negative subscale, ETI or BDI-II ratings. DISCUSSION This study provides the first evidence of: (i) a significant decrease of mtDNAcn in combat PTSD, (ii) a possible "inverted-U" shaped relationship between PTSD symptom severity and mtDNAcn within PTSD subjects, and (iii) a direct correlation of mtDNAcn with positive affectivity within PTSD subjects. Altered mtDNAcn in PTSD may reflect impaired energy metabolism, which might represent a novel aspect of its pathophysiology.
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Affiliation(s)
- Francesco Saverio Bersani
- Department of Psychiatry, University of California San Francisco, San Francisco, CA, USA; Department of Neurology and Psychiatry, Sapienza University of Rome, Rome, Italy
| | - Claire Morley
- Department of Psychiatry, University of California San Francisco, San Francisco, CA, USA
| | - Daniel Lindqvist
- Department of Psychiatry, University of California San Francisco, San Francisco, CA, USA; Department of Clinical Sciences, Section for Psychiatry, Lund University, Lund, Sweden
| | - Elissa S Epel
- Department of Psychiatry, University of California San Francisco, San Francisco, CA, USA; Center for Health and Community, University of California San Francisco, San Francisco, CA, USA
| | - Martin Picard
- Center for Mitochondrial and Epigenomic Medicine, The Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA, USA
| | - Rachel Yehuda
- Department of Psychiatry, MSSM/James J. Peters Veterans Administration Medical Center, New York, NY, USA
| | - Janine Flory
- Department of Psychiatry, MSSM/James J. Peters Veterans Administration Medical Center, New York, NY, USA
| | - Linda M Bierer
- Department of Psychiatry, MSSM/James J. Peters Veterans Administration Medical Center, New York, NY, USA
| | - Iouri Makotkine
- Department of Psychiatry, MSSM/James J. Peters Veterans Administration Medical Center, New York, NY, USA
| | - Duna Abu-Amara
- Department of Psychiatry, Steven and Alexandra Cohen Veterans Center for Posttraumatic Stress and Traumatic Brain Injury, New York, NY, USA
| | - Michelle Coy
- Department of Psychiatry, University of California San Francisco, San Francisco, CA, USA
| | - Victor I Reus
- Department of Psychiatry, University of California San Francisco, San Francisco, CA, USA
| | - Jue Lin
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA, USA
| | - Elizabeth H Blackburn
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA, USA
| | - Charles Marmar
- Department of Psychiatry, Steven and Alexandra Cohen Veterans Center for Posttraumatic Stress and Traumatic Brain Injury, New York, NY, USA
| | - Owen M Wolkowitz
- Department of Psychiatry, University of California San Francisco, San Francisco, CA, USA.
| | - Synthia H Mellon
- Department of OB/GYN and Reproductive Science, University of California San Francisco, San Francisco, CA, USA
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Shen J, Wan J, Song R, Zhao H. Peripheral blood mitochondrial DNA copy number, length heteroplasmy and breast cancer risk: a replication study. Carcinogenesis 2015; 36:1307-13. [PMID: 26363030 DOI: 10.1093/carcin/bgv130] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 08/28/2015] [Indexed: 01/31/2023] Open
Abstract
Oxidative stress has consistently been linked to breast carcinogenesis, and mitochondria play a significant role in regulating reactive oxygen species generation. In our previous study, we found that increased levels of mitochondrial DNA (mtDNA) copy number and the presence of mitochondrial length heteroplasmies in the hypervariable (HV) regions 1 and 2 (HV1 and HV2) in peripheral blood are associated with increased risk of breast cancer. In current study with 1000 breast cancer cases and 1000 healthy controls, we intended to replicate our previous findings. Overall, levels of mtDNA copy number were significantly higher in breast cancer cases than healthy controls (mean: 1.17 versus 0.94, P < 0.001). In the multivariate linear regression analysis, increased mtDNA copy number levels were associated with a 1.32-fold increased risk of breast cancer [adjusted odds ratio (OR) = 1.32, 95% confidence interval (CI) = 1.15-1.67]. Breast cancer cases were more likely to have HV1 and HV2 region length heteroplasmies than healthy controls (P < 0.001, respectively). The existence of HV1 and HV2 length heteroplasmies was associated with 2.01- and 1.63-folds increased risk of breast cancer (for HV1: OR = 2.01, 95% CI = 1.66-2.42; for HV2: OR = 1.63, 95% CI = 1.34-1.92). Additionally, joint effects among mtDNA copy number, HV1 and HV2 length heteroplasmies were observed. Our results are consistent with our previous findings and further support the roles of mtDNA copy number and mtDNA length heteroplasmies that may play in the development of breast cancer.
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Affiliation(s)
- Jie Shen
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, 1155 Pressler Street, Houston, TX 77030, USA
| | - Jie Wan
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, 1155 Pressler Street, Houston, TX 77030, USA
| | - Renduo Song
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, 1155 Pressler Street, Houston, TX 77030, USA
| | - Hua Zhao
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, 1155 Pressler Street, Houston, TX 77030, USA
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Lee JY, Lee DC, Im JA, Lee JW. Mitochondrial DNA copy number in peripheral blood is independently associated with visceral fat accumulation in healthy young adults. Int J Endocrinol 2014; 2014:586017. [PMID: 24707289 PMCID: PMC3953665 DOI: 10.1155/2014/586017] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 12/22/2013] [Accepted: 01/01/2014] [Indexed: 11/17/2022] Open
Abstract
Aims. Visceral obesity is associated with an increased risk of cardiometabolic diseases and it is important to identify the underlying mechanisms. There is growing evidence that mitochondrial dysfunction is associated with metabolic disturbances related to visceral obesity. In addition, maintaining mitochondrial DNA (mtDNA) copy number is important for preserving mitochondrial function. Therefore, we investigated the relationship between mtDNA copy number and visceral fat in healthy young adults. Methods. A total of 94 healthy young subjects were studied. Biomarkers of metabolic risk factors were assessed along with body composition by computed tomography. mtDNA copy number was measured in peripheral leukocytes using real-time polymerase chain reaction (PCR) methods. Results. The mtDNA copy number correlated with BMI (r = -0.22, P = 0.04), waist circumference (r = -0.23, P = 0.03), visceral fat area (r = -0.28, P = -0.01), HDL-cholesterol levels (r = 0.25, P = 0.02), and hs-CRP (r = 0.32, P = 0.02) after adjusting for age and sex. Both stepwise and nonstepwise multiple regression analyses confirmed that visceral fat area was independently associated with mtDNA copy number (β = -0.33, P < 0.01, β = 0.32, and P = 0.03, resp.). Conclusions. An independent association between mtDNA content and visceral adiposity was identified. These data suggest that mtDNA copy number is a potential predictive marker for metabolic disturbances. Further studies are required to understand the causality and clinical significance of our findings.
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Affiliation(s)
- Jee-Yon Lee
- Department of Family Medicine, Severance Hospital, Yonsei University, College of Medicine, 250 Seongsanno, Seodaemun-gu 120-752, Republic of Korea
| | - Duk-Chul Lee
- Department of Family Medicine, Severance Hospital, Yonsei University, College of Medicine, 250 Seongsanno, Seodaemun-gu 120-752, Republic of Korea
| | - Jee-Aee Im
- Sport and Medicine Research Center, INTOTO Inc., 401 Dawoo BD, 90-6 Daeshin-Dong, Seodaemun-gu, Seoul 120-160, Republic of Korea
| | - Ji-Won Lee
- Department of Family Medicine, Severance Hospital, Yonsei University, College of Medicine, 250 Seongsanno, Seodaemun-gu 120-752, Republic of Korea
- *Ji-Won Lee:
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Hughes C, Waters M, Allen D, Obasanjo I. Translational toxicology: a developmental focus for integrated research strategies. BMC Pharmacol Toxicol 2013; 14:51. [PMID: 24079609 PMCID: PMC3850030 DOI: 10.1186/2050-6511-14-51] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 09/23/2013] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Given that toxicology studies the potential adverse effects of environmental exposures on various forms of life and that clinical toxicology typically focuses on human health effects, what can and should the relatively new term of "translational toxicology" be taken to mean? DISCUSSION Our assertion is that the core concept of translational toxicology must incorporate existing principles of toxicology and epidemiology, but be driven by the aim of developing safe and effective interventions beyond simple reduction or avoidance of exposure to prevent, mitigate or reverse adverse human health effects of exposures.The field of toxicology has now reached a point where advances in multiple areas of biomedical research and information technologies empower us to make fundamental transitions in directly impacting human health. Translational toxicology must encompass four action elements as follows: 1) Assessing human exposures in critical windows across the lifespan; 2) Defining modes of action and relevance of data from animal models; 3) Use of mathematical models to develop plausible predictions as the basis for: 4) Protective and restorative human health interventions. The discussion focuses on the critical window of in-utero development. SUMMARY Exposure assessment, basic toxicology and development of certain categories of mathematical models are not new areas of research; however overtly integrating these in order to conceive, assess and validate effective interventions to mitigate or reverse adverse effects of environmental exposures is our novel opportunity. This is what we should do in translational toxicology so that we have a portfolio of interventional options to improve human health that include both minimizing exposures and specific preventative/restorative/mitigative therapeutics.
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Affiliation(s)
- Claude Hughes
- Quintiles, Inc, North Carolina State University; Wake Forest University; Duke University Medical Center, Morrisville, NC, USA
| | - Michael Waters
- Integrated Laboratory Systems, Inc, Research Triangle Park, Durham, NC, USA
| | - David Allen
- Integrated Laboratory Systems, Inc, Research Triangle Park, Durham, NC, USA
| | - Iyabo Obasanjo
- Advanced Leadership Fellow, Harvard University, Cambridge, MA, USA
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Current world literature. Curr Opin Obstet Gynecol 2012; 24:470-8. [PMID: 23154665 DOI: 10.1097/gco.0b013e32835ae910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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