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Wang C, Liu H, Li XY, Ma J, Gu Z, Feng X, Xie S, Tang BS, Chen S, Wang W, Wang J, Zhang J, Chan P. High-depth whole-genome sequencing identifies structure variants, copy number variants and short tandem repeats associated with Parkinson's disease. NPJ Parkinsons Dis 2024; 10:134. [PMID: 39043730 PMCID: PMC11266557 DOI: 10.1038/s41531-024-00722-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 05/10/2024] [Indexed: 07/25/2024] Open
Abstract
While numerous single nucleotide variants and small indels have been identified in Parkinson's disease (PD), the contribution of structural variants (SVs), copy number variants (CNVs), and short tandem repeats (STRs) remains poorly understood. Here we investigated the association using the high-depth whole-genome sequencing data from 466 Chinese PD patients and 513 controls. Totally, we identified 29,561 SVs, 32,153 CNVs, and 174,905 STRs, and found that CNV deletions were significantly enriched in the end-proportion of autosomal chromosomes in PD. After genome-wide association analysis and replication in an external cohort of 352 cases and 547 controls, we validated that the 1.6 kb-deletion neighboring MUC19, 12.4kb-deletion near RXFP1 and GGGAAA repeats in SLC2A13 were significantly associated with PD. Moreover, the MUC19 deletion and the SLC2A13 5-copy repeat reduced the penetrance of the LRRK2 G2385R variant. Moreover, genes with these variants were dosage-sensitive. These data provided novel insights into the genetic architecture of PD.
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Affiliation(s)
- Chaodong Wang
- Department of Neurology & Neurobiology, Xuanwu Hospital of Capital Medical University, National Clinical Research Center for Geriatric Diseases, Beijing, 100053, China
| | - Hankui Liu
- BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, 518083, China
| | - Xu-Ying Li
- Department of Neurology & Neurobiology, Xuanwu Hospital of Capital Medical University, National Clinical Research Center for Geriatric Diseases, Beijing, 100053, China
| | - Jinghong Ma
- Department of Neurology & Neurobiology, Xuanwu Hospital of Capital Medical University, National Clinical Research Center for Geriatric Diseases, Beijing, 100053, China
| | - Zhuqin Gu
- Department of Neurology & Neurobiology, Xuanwu Hospital of Capital Medical University, National Clinical Research Center for Geriatric Diseases, Beijing, 100053, China
| | - Xiuli Feng
- National Human Genome Center in Beijing, Beijing Economic-Technological Development Zone, Beijing, 100176, China
| | - Shu Xie
- National Human Genome Center in Beijing, Beijing Economic-Technological Development Zone, Beijing, 100176, China
| | - Bei-Sha Tang
- Department of Neurology, Xiangya Hospital, Central South University, State Key Laboratory of Medical Genetics, Changsha, China
| | - Shengdi Chen
- Department of Neurology, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wei Wang
- BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, 518083, China
| | - Jian Wang
- BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, 518083, China
| | - Jianguo Zhang
- BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, 518083, China.
- Hebei Industrial Technology Research Institute of Genomics in Maternal & Child Health, Shijiazhuang, 050000, China.
| | - Piu Chan
- Department of Neurology & Neurobiology, Xuanwu Hospital of Capital Medical University, National Clinical Research Center for Geriatric Diseases, Beijing, 100053, China.
- Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China.
- Clinical Center for Parkinson's Disease, Capital Medical University, Key Laboratory for Neurodegenerative Disease of the Ministry of Education, Beijing Key Laboratory for Parkinson's Disease, Beijing, China.
- Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China.
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2
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Meltzer WA, Gupta A, Lin PN, Brown RA, Benyamien-Roufaeil DS, Khatri R, Mahurkar AA, Song Y, Taylor RJ, Zalzman M. Reprogramming Chromosome Ends by Functional Histone Acetylation. Int J Mol Sci 2024; 25:3898. [PMID: 38612707 PMCID: PMC11011970 DOI: 10.3390/ijms25073898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/26/2024] [Accepted: 03/28/2024] [Indexed: 04/14/2024] Open
Abstract
Cancers harness embryonic programs to evade aging and promote survival. Normally, sequences at chromosome ends called telomeres shorten with cell division, serving as a countdown clock to limit cell replication. Therefore, a crucial aspect of cancerous transformation is avoiding replicative aging by activation of telomere repair programs. Mouse embryonic stem cells (mESCs) activate a transient expression of the gene Zscan4, which correlates with chromatin de-condensation and telomere extension. Head and neck squamous cell carcinoma (HNSCC) cancers reactivate ZSCAN4, which in turn regulates the phenotype of cancer stem cells (CSCs). Our study reveals a new role for human ZSCAN4 in facilitating functional histone H3 acetylation at telomere chromatin. Next-generation sequencing indicates ZSCAN4 enrichment at telomere chromatin. These changes correlate with ZSCAN4-induced histone H3 acetylation and telomere elongation, while CRISPR/Cas9 knockout of ZSCAN4 leads to reduced H3 acetylation and telomere shortening. Our study elucidates the intricate involvement of ZSCAN4 and its significant contribution to telomere chromatin remodeling. These findings suggest that ZSCAN4 induction serves as a novel link between 'stemness' and telomere maintenance. Targeting ZSCAN4 may offer new therapeutic approaches to effectively limit or enhance the replicative lifespan of stem cells and cancer cells.
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Affiliation(s)
- W. Alex Meltzer
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA (A.G.); (P.N.L.); (R.A.B.); (D.S.B.-R.); (R.K.)
| | - Aditi Gupta
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA (A.G.); (P.N.L.); (R.A.B.); (D.S.B.-R.); (R.K.)
| | - Phyo Nay Lin
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA (A.G.); (P.N.L.); (R.A.B.); (D.S.B.-R.); (R.K.)
| | - Robert A. Brown
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA (A.G.); (P.N.L.); (R.A.B.); (D.S.B.-R.); (R.K.)
| | - Daniel S. Benyamien-Roufaeil
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA (A.G.); (P.N.L.); (R.A.B.); (D.S.B.-R.); (R.K.)
| | - Raju Khatri
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA (A.G.); (P.N.L.); (R.A.B.); (D.S.B.-R.); (R.K.)
| | - Anup A. Mahurkar
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD 21201, USA; (A.A.M.); (Y.S.)
| | - Yang Song
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD 21201, USA; (A.A.M.); (Y.S.)
| | - Rodney J. Taylor
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA;
- Marlene and Stewart Greenbaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Michal Zalzman
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA (A.G.); (P.N.L.); (R.A.B.); (D.S.B.-R.); (R.K.)
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA;
- Marlene and Stewart Greenbaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- The Center for Stem Cell Biology and Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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3
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Vellingiri B, Balasubramani K, Iyer M, Raj N, Elangovan A, Song K, Yeo HC, Jayakumar N, Kinoshita M, Thangarasu R, Narayanasamy A, Dayem AA, Prajapati VK, Gopalakrishnan AV, Cho SG. Role of Telomeres and Telomerase in Parkinson's Disease-A New Theranostics? Adv Biol (Weinh) 2023; 7:e2300097. [PMID: 37590305 DOI: 10.1002/adbi.202300097] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/19/2023] [Indexed: 08/19/2023]
Abstract
Parkinson's disease (PD) is a complex condition that is significantly influenced by oxidative stress and inflammation. It is also suggested that telomere shortening (TS) is regulated by oxidative stress which leads to various diseases including age-related neurodegenerative diseases like PD. Thus, it is anticipated that PD would result in TS of peripheral blood mononuclear cells (PBMCs). Telomeres protect the ends of eukaryotic chromosomes preserving them against fusion and destruction. The TS is a normal process because DNA polymerase is unable to replicate the linear ends of the DNA due to end replication complications and telomerase activity in various cell types counteracts this process. PD is usually observed in the aged population and progresses over time therefore, disparities among telomere length in PBMCs of PD patients are recorded and it is still a question whether it has any useful role. Here, the likelihood of telomere attrition in PD and its implications concerning microglia activation, ageing, oxidative stress, and the significance of telomerase activators are addressed. Also, the possibility of telomeres and telomerase as a diagnostic and therapeutic biomarker in PD is discussed.
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Affiliation(s)
- Balachandar Vellingiri
- Stem Cell and Regenerative Medicine/Translational Research, Department of Zoology, School of Basic Sciences, Central University of Punjab, Bathinda, Punjab, 151401, India
| | - Kiruthika Balasubramani
- Human Molecular Cytogenetics and Stem Cell Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, Tamil Nadu, 641046, India
| | - Mahalaxmi Iyer
- Department of Biotechnology, Karpagam Academy of Higher Education (Deemed to be University), Coimbatore, Tamil Nadu, 641021, India
| | - Neethu Raj
- Human Molecular Cytogenetics and Stem Cell Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, Tamil Nadu, 641046, India
| | - Ajay Elangovan
- Stem Cell and Regenerative Medicine/Translational Research, Department of Zoology, School of Basic Sciences, Central University of Punjab, Bathinda, Punjab, 151401, India
| | - Kwonwoo Song
- Department of Stem Cell and Regenerative Biotechnology, Molecular and Cellular Reprogramming Center and Institute of Advanced Regenerative Science, Konkuk University, Seoul, 05029, Republic of Korea
| | - Han-Cheol Yeo
- Department of Stem Cell and Regenerative Biotechnology, Molecular and Cellular Reprogramming Center and Institute of Advanced Regenerative Science, Konkuk University, Seoul, 05029, Republic of Korea
| | - Namitha Jayakumar
- Department of Biotechnology, Sri Ramakrishna College of Arts and Science, Coimbatore, Tamil Nadu, 641006, India
| | - Masako Kinoshita
- Department of Neurology, National Hospital Organization Utano National Hospital, Ondoyama-Cho, Narutaki, Ukyo-Ku, Kyoto, 616-8255, Japan
| | - Ravimanickam Thangarasu
- Department of Zoology, School of Science, Tamil Nadu Open University, Saidapet, Chennai, 600015, India
| | - Arul Narayanasamy
- Disease Proteomics Laboratory, Department of Zoology, Bharathiar University, Coimbatore, Tamil Nadu, 641046, India
| | - Ahmed Abdal Dayem
- Department of Stem Cell and Regenerative Biotechnology, Molecular and Cellular Reprogramming Center and Institute of Advanced Regenerative Science, Konkuk University, Seoul, 05029, Republic of Korea
| | - Vijay Kumar Prajapati
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, Dhaula Kuan, New Delhi, 110021, India
| | - Abilash Valsala Gopalakrishnan
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India
| | - Ssang-Goo Cho
- Department of Stem Cell and Regenerative Biotechnology, Molecular and Cellular Reprogramming Center and Institute of Advanced Regenerative Science, Konkuk University, Seoul, 05029, Republic of Korea
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Ortega-Vázquez A, Sánchez-Badajos S, Ramírez-García MÁ, Alvarez-Luquín D, López-López M, Adalid-Peralta LV, Monroy-Jaramillo N. Longitudinal Changes in Mitochondrial DNA Copy Number and Telomere Length in Patients with Parkinson's Disease. Genes (Basel) 2023; 14:1913. [PMID: 37895262 PMCID: PMC10606744 DOI: 10.3390/genes14101913] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 09/30/2023] [Accepted: 10/05/2023] [Indexed: 10/29/2023] Open
Abstract
Parkinson's disease (PD) pathophysiology includes mitochondrial dysfunction, neuroinflammation, and aging as its biggest risk factors. Mitochondrial DNA copy number (mtDNA-CN) and telomere length (TL) are biological aging markers with inconclusive results regarding their association with PD. A case-control study was used to measure TL and mtDNA-CN using qPCR in PBMCs. PD patients were naive at baseline (T0) and followed-up at one (T1) and two (T2) years after the dopaminergic treatment (DRT). Plasmatic cytokines were determined by ELISA in all participants, along with clinical parameters of patients at T0. While TL was shorter in patients vs. controls at all time points evaluated (p < 0.01), mtDNA-CN showed no differences. An increase in mtDNA-CN and TL was observed in treated patients vs. naive ones (p < 0.001). Our statistical model analyzed both aging markers with covariates, showing a strong correlation between them (r = 0.57, p < 0.01), and IL-17A levels positively correlating with mtDNA-CN only in untreated patients (r = 0.45, p < 0.05). TL and mtDNA-CN could be useful markers for monitoring inflammation progression or treatment response in PD. DRT might modulate TL and mtDNA-CN, reflecting a compensatory mechanism to counteract mitochondrial dysfunction in PD, but this needs further investigation.
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Affiliation(s)
- Alberto Ortega-Vázquez
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Unidad Xochimilco, Mexico City 04960, Mexico; (A.O.-V.); (M.L.-L.)
| | - Salvador Sánchez-Badajos
- Doctorado en Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, Unidad Xochimilco, Mexico City 04960, Mexico;
| | | | - Diana Alvarez-Luquín
- Laboratorio de Reprogramación Celular del Instituto de Fisiología Celular UNAM en el Instituto Nacional de Neurología y Neurocirugía, Mexico City 14269, Mexico; (D.A.-L.); (L.V.A.-P.)
| | - Marisol López-López
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Unidad Xochimilco, Mexico City 04960, Mexico; (A.O.-V.); (M.L.-L.)
| | - Laura Virginia Adalid-Peralta
- Laboratorio de Reprogramación Celular del Instituto de Fisiología Celular UNAM en el Instituto Nacional de Neurología y Neurocirugía, Mexico City 14269, Mexico; (D.A.-L.); (L.V.A.-P.)
| | - Nancy Monroy-Jaramillo
- Departamento de Genética, Instituto Nacional de Neurología y Neurocirugía, Mexico City 14269, Mexico;
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5
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Asghar M, Odeh A, Fattahi AJ, Henriksson AE, Miglar A, Khosousi S, Svenningsson P. Mitochondrial biogenesis, telomere length and cellular senescence in Parkinson's disease and Lewy body dementia. Sci Rep 2022; 12:17578. [PMID: 36266468 PMCID: PMC9584960 DOI: 10.1038/s41598-022-22400-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 10/14/2022] [Indexed: 01/13/2023] Open
Abstract
Progressive age is the single major risk factor for neurodegenerative diseases. Cellular aging markers during Parkinson's disease (PD) have been implicated in previous studies, however the majority of studies have investigated the association of individual cellular aging hallmarks with PD but not jointly. Here, we have studied the association of PD with three aging hallmarks (telomere attrition, mitochondrial dysfunction, and cellular senescence) in blood and the brain tissue. Our results show that PD patients had 20% lower mitochondrial DNA copies but 26% longer telomeres in blood compared to controls. Moreover, telomere length in blood was positively correlated with medication (Levodopa Equivalent Daily Dose, LEDD) and disease duration. Similar results were found in brain tissue, where patients with Parkinson's disease (PD), Parkinson's disease dementia (PDD) and Dementia with Lewy Bodies (DLB) showed (46-95%) depleted mtDNA copies, but (7-9%) longer telomeres compared to controls. In addition, patients had lower mitochondrial biogenesis (PGC-1α and PGC-1β) and higher load of a cellular senescence marker in postmortem prefrontal cortex tissue, with DLB showing the highest effect among the patient groups. Our results suggest that mitochondrial dysfunction (copy number and biogenesis) in blood might be a valuable marker to assess the risk of PD. However, further studies with larger sample size are needed to evaluate these findings.
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Affiliation(s)
- Muhammad Asghar
- grid.4514.40000 0001 0930 2361Department of Biology, Lund University, Lund, Sweden ,grid.465198.7Division of Infectious Diseases, Department of Medicine Solna, Karolinska Institutet, Solna, Sweden
| | - Amani Odeh
- grid.465198.7Division of Infectious Diseases, Department of Medicine Solna, Karolinska Institutet, Solna, Sweden
| | - Ahmad Jouni Fattahi
- grid.8993.b0000 0004 1936 9457Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Alexandra Edwards Henriksson
- grid.465198.7Division of Infectious Diseases, Department of Medicine Solna, Karolinska Institutet, Solna, Sweden
| | - Aurelie Miglar
- grid.465198.7Division of Infectious Diseases, Department of Medicine Solna, Karolinska Institutet, Solna, Sweden
| | - Shervin Khosousi
- grid.465198.7Department of Clinical Neuroscience, Karolinska Institutet, Solna, Sweden ,grid.13097.3c0000 0001 2322 6764Basal and Clinical Neuroscience, Institute of Psychiatry, King’s College London, Psychology & Neuroscience, London, UK
| | - Per Svenningsson
- grid.465198.7Department of Clinical Neuroscience, Karolinska Institutet, Solna, Sweden ,grid.13097.3c0000 0001 2322 6764Basal and Clinical Neuroscience, Institute of Psychiatry, King’s College London, Psychology & Neuroscience, London, UK
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Tacheva T, Zienolddiny S, Dimov D, Vlaykova D, Vlaykova T. The leukocyte telomere length, single nucleotide polymorphisms near TERC gene and risk of COPD. PeerJ 2021; 9:e12190. [PMID: 34824901 PMCID: PMC8590800 DOI: 10.7717/peerj.12190] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 08/30/2021] [Indexed: 12/12/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is characterized by irreversible airflow obstruction and is associated with chronic local and systemic inflammation and oxidative stress. The enhanced oxidative stress and inflammation have been reported to affect telomere length (TL). Furthermore, a number of SNPs at loci encoding the main components of the telomerase genes, TERT and TERC have been shown to correlate with TL. We aimed to explore the leukocyte TL and genotypes for single nucleotide polymorphisms, rs12696304 (C > G) and rs10936599 (C > T) near TERC in COPD cases and matched healthy controls using q-PCR technologies. Successful assessment of TL was performed for 91 patients and 88 controls. The patients had shorter TL (17919.36 ± 1203.01 bp) compared to controls (21 271.48 ± 1891.36 bp) although not significant (p = 0.137). The TL did not associate with the gender, age, spirometric indexes, smoking habits but tended to correlate negatively with BMI (Rho = − 0.215, p = 0.076) in the controls, but not in COPD patients. The genotype frequencies of the SNPs rs12696304 and rs10936599 were compared between patients and controls and the odds ratios (OR) for developing COPD were calculated. The carriers of the common homozygous (CC) genotypes of the SNPs had higher risk for COPD, compared to carriers of the variants alleles (rs12696304 CG+GG vs. CC; OR: 0.615, 95% CI [0.424–0.894], p = 0.011 and for rs10936599 CT+TT vs. CC OR = 0.668, 95% CI [0.457–0.976], p = 0.044). Analysis on the combined effects of the TERCrs12696304 (C > G) and rs10936599 (C > T) genotypes, CC/CC genotype combination was associated with higher risk for COPD (p < 0.0001) and marginally lower FEV1% pr. in patients with GOLD II (p = 0.052). There was no association between the SNP genotypes and TL. In summary, our results suggest that COPD patients may have shorter TL, and rs12696304 and rs10936599 near TERC may affect the risk of COPD independently of TL.
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Affiliation(s)
- Tanya Tacheva
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, Stara Zagora, Bulgaria
| | - Shanbeh Zienolddiny
- Section for Toxicology and Biological Work Environment, National Institute of Occupational Health, Oslo, Norway
| | - Dimo Dimov
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, Stara Zagora, Bulgaria
| | - Denitsa Vlaykova
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, Stara Zagora, Bulgaria
| | - Tatyana Vlaykova
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, Stara Zagora, Bulgaria.,Department of Medical Biochemistry, Medical University - Plovdiv, Plovdiv, Bulgaria
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7
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Martin-Ruiz C, Williams-Gray CH, Yarnall AJ, Boucher JJ, Lawson RA, Wijeyekoon RS, Barker RA, Kolenda C, Parker C, Burn DJ, Von Zglinicki T, Saretzki G. Senescence and Inflammatory Markers for Predicting Clinical Progression in Parkinson's Disease: The ICICLE-PD Study. JOURNAL OF PARKINSONS DISEASE 2021; 10:193-206. [PMID: 31868677 PMCID: PMC7029330 DOI: 10.3233/jpd-191724] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Background: Cognitive decline is a frequent complication of Parkinson’s disease (PD) and the identification of predictive biomarkers for it would help in its management. Objective: Our aim was to analyse whether senescence markers (telomere length, p16 and p21) or their change over time could help to better predict cognitive and motor progression of newly diagnosed PD patients. We also compared these senescence markers to previously analysed markers of inflammation for the same purpose. Methods: This study examined the association of blood-derived markers of cell senescence and inflammation with motor and cognitive function over time in an incident PD cohort (the ICICLE-PD study). Participants (154 newly diagnosed PD patients and 99 controls) underwent physical and cognitive assessments over 36 months of follow up. Mean leukocyte telomere length and the expression of senescence markers p21 and p16 were measured at two time points (baseline and 18 months). Additionally, we selected five inflammatory markers from existing baseline data. Results: We found that PD patients had shorter telomeres at baseline and 18 months compared to age-matched healthy controls which also correlated to dementia at 36 months. Baseline p16 levels were associated with faster rates of motor and cognitive decline over 36 months in PD cases, while a simple inflammatory summary score at baseline best predicted cognitive score over this same time period in PD patients. Conclusion: Our study suggests that both inflammatory and senescence markers (p16) are valuable predictors of clinical progression in PD patients.
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Affiliation(s)
- Carmen Martin-Ruiz
- The NIHR Newcastle Biomedical Research Centre, Newcastle University, Campus for Ageing and Vitality, Newcastle Upon Tyne, UK.,Biosciences Institute, Newcastle University, Campus for Ageing and Vitality, Newcastle Upon Tyne, UK
| | - Caroline H Williams-Gray
- Department of Clinical Neurosciences, John Van Geest Centre for Brain Repair, University of Cambridge, Cambridge, UK
| | - Alison J Yarnall
- The NIHR Newcastle Biomedical Research Centre, Newcastle University, Campus for Ageing and Vitality, Newcastle Upon Tyne, UK.,Translational and Clinical Research Institute, Newcastle University, UK.,The Newcastle upon Tyne Hospitals NHS Foundation Trust (NUTH), Newcastle Upon Tyne, UK
| | - John J Boucher
- The NIHR Newcastle Biomedical Research Centre, Newcastle University, Campus for Ageing and Vitality, Newcastle Upon Tyne, UK.,Current address: Department of Neurology, University College Hospital, Galway, Ireland
| | - Rachael A Lawson
- Translational and Clinical Research Institute, Newcastle University, UK.,The Newcastle upon Tyne Hospitals NHS Foundation Trust (NUTH), Newcastle Upon Tyne, UK
| | - Ruwani S Wijeyekoon
- Department of Clinical Neurosciences, John Van Geest Centre for Brain Repair, University of Cambridge, Cambridge, UK
| | - Roger A Barker
- Department of Clinical Neurosciences, John Van Geest Centre for Brain Repair, University of Cambridge, Cambridge, UK.,WT-MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Claire Kolenda
- The NIHR Newcastle Biomedical Research Centre, Newcastle University, Campus for Ageing and Vitality, Newcastle Upon Tyne, UK
| | - Craig Parker
- The NIHR Newcastle Biomedical Research Centre, Newcastle University, Campus for Ageing and Vitality, Newcastle Upon Tyne, UK
| | - David J Burn
- Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, The Newcastle upon Tyne Hospitals NHS Foundation Trust (NUTH), Newcastle Upon Tyne, UK
| | - Thomas Von Zglinicki
- Biosciences Institute, Newcastle University, Campus for Ageing and Vitality, Newcastle Upon Tyne, UK
| | - Gabriele Saretzki
- Biosciences Institute, Newcastle University, Campus for Ageing and Vitality, Newcastle Upon Tyne, UK
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8
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Ageing affects subtelomeric DNA methylation in blood cells from a large European population enrolled in the MARK-AGE study. GeroScience 2021; 43:1283-1302. [PMID: 33870444 PMCID: PMC8190237 DOI: 10.1007/s11357-021-00347-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 02/23/2021] [Indexed: 11/23/2022] Open
Abstract
Ageing leaves characteristic traces in the DNA methylation make-up of the genome. However, the importance of DNA methylation in ageing remains unclear. The study of subtelomeric regions could give promising insights into this issue. Previously reported associations between susceptibility to age-related diseases and epigenetic instability at subtelomeres suggest that the DNA methylation profile of subtelomeres undergoes remodelling during ageing. In the present work, this hypothesis has been tested in the context of the European large-scale project MARK-AGE. In this cross-sectional study, we profiled the DNA methylation of chromosomes 5 and 21 subtelomeres, in more than 2000 age-stratified women and men recruited in eight European countries. The study included individuals from the general population as well as the offspring of nonagenarians and Down syndrome subjects, who served as putative models of delayed and accelerated ageing, respectively. Significant linear changes of subtelomeric DNA methylation with increasing age were detected in the general population, indicating that subtelomeric DNA methylation changes are typical signs of ageing. Data also show that, compared to the general population, the dynamics of age-related DNA methylation changes are attenuated in the offspring of centenarian, while they accelerate in Down syndrome individuals. This result suggests that subtelomeric DNA methylation changes reflect the rate of ageing progression. We next attempted to trace the age-related changes of subtelomeric methylation back to the influence of diverse variables associated with methylation variations in the population, including demographics, dietary/health habits and clinical parameters. Results indicate that the effects of age on subtelomeric DNA methylation are mostly independent of all other variables evaluated.
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9
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Potential roles of telomeres and telomerase in neurodegenerative diseases. Int J Biol Macromol 2020; 163:1060-1078. [DOI: 10.1016/j.ijbiomac.2020.07.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/23/2020] [Accepted: 07/06/2020] [Indexed: 12/16/2022]
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10
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Levstek T, Kozjek E, Dolžan V, Trebušak Podkrajšek K. Telomere Attrition in Neurodegenerative Disorders. Front Cell Neurosci 2020; 14:219. [PMID: 32760251 PMCID: PMC7373805 DOI: 10.3389/fncel.2020.00219] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/19/2020] [Indexed: 12/13/2022] Open
Abstract
Telomere attrition is increased in various disorders and is therefore a potential biomarker for diagnosis and/or prognosis of these disorders. The contribution of telomere attrition in the pathogenesis of neurodegenerative disorders is yet to be fully elucidated. We are reviewing the current knowledge regarding the telomere biology in two common neurodegenerative disorders, Alzheimer's disease (AD), and Parkinson's disease (PD). Furthermore, we are discussing future prospective of telomere research in these disorders. The majority of studies reported consistent evidence of the accelerated telomere attrition in AD patients, possibly in association with elevated oxidative stress levels. On the other hand in PD, various studies reported contradictory evidence regarding telomere attrition. Consequently, due to the low specificity and sensitivity, the clinical benefit of telomere length as a biomarker of neurodegenerative disease development and progression is not yet recognized. Nevertheless, longitudinal studies in large carefully selected cohorts might provide further elucidation of the complex involvement of the telomeres in the pathogenesis of neurodegenerative diseases. Telomere length maintenance is a complex process characterized by environmental, genetic, and epigenetic determinants. Thus, in addition to the selection of the study cohort, also the selection of analytical methods and types of biological samples for evaluation of the telomere attrition is of utmost importance.
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Affiliation(s)
- Tina Levstek
- Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Eva Kozjek
- Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Vita Dolžan
- Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Katarina Trebušak Podkrajšek
- Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
- Clinical Institute for Special Laboratory Diagnostics, University Children’s Hospital, University Medical Centre Ljubljana, Ljubljana, Slovenia
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11
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A Dual Face of APE1 in the Maintenance of Genetic Stability in Monocytes: An Overview of the Current Status and Future Perspectives. Genes (Basel) 2020; 11:genes11060643. [PMID: 32545201 PMCID: PMC7349382 DOI: 10.3390/genes11060643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 12/24/2022] Open
Abstract
Monocytes, which play a crucial role in the immune system, are characterized by an enormous sensitivity to oxidative stress. As they lack four key proteins responsible for DNA damage response (DDR) pathways, they are especially prone to reactive oxygen species (ROS) exposure leading to oxidative DNA lesions and, consequently, ROS-driven apoptosis. Although such a phenomenon is of important biological significance in the regulation of monocyte/macrophage/dendritic cells’ balance, it also a challenge for monocytic mechanisms that have to provide and maintain genetic stability of its own DNA. Interestingly, apurinic/apyrimidinic endonuclease 1 (APE1), which is one of the key proteins in two DDR mechanisms, base excision repair (BER) and non-homologous end joining (NHEJ) pathways, operates in monocytic cells, although both BER and NHEJ are impaired in these cells. Thus, on the one hand, APE1 endonucleolytic activity leads to enhanced levels of both single- and double-strand DNA breaks (SSDs and DSBs, respectively) in monocytic DNA that remain unrepaired because of the impaired BER and NHEJ. On the other hand, there is some experimental evidence suggesting that APE1 is a crucial player in monocytic genome maintenance and stability through different molecular mechanisms, including induction of cytoprotective and antioxidant genes. Here, the dual face of APE1 is discussed.
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12
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Martínez-Cué C, Rueda N. Cellular Senescence in Neurodegenerative Diseases. Front Cell Neurosci 2020; 14:16. [PMID: 32116562 PMCID: PMC7026683 DOI: 10.3389/fncel.2020.00016] [Citation(s) in RCA: 152] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 01/21/2020] [Indexed: 01/10/2023] Open
Abstract
Cellular senescence is a homeostatic biological process characterized by a permanent state of cell cycle arrest that can contribute to the decline of the regenerative potential and function of tissues. The increased presence of senescent cells in different neurodegenerative diseases suggests the contribution of senescence in the pathophysiology of these disorders. Although several factors can induce senescence, DNA damage, oxidative stress, neuroinflammation, and altered proteostasis have been shown to play a role in its onset. Oxidative stress contributes to accelerated aging and cognitive dysfunction stages affecting neurogenesis, neuronal differentiation, connectivity, and survival. During later life stages, it is implicated in the progression of cognitive decline, synapse loss, and neuronal degeneration. Also, neuroinflammation exacerbates oxidative stress, synaptic dysfunction, and neuronal death through the harmful effects of pro-inflammatory cytokines on cell proliferation and maturation. Both oxidative stress and neuroinflammation can induce DNA damage and alterations in DNA repair that, in turn, can exacerbate them. Another important feature associated with senescence is altered proteostasis. Because of the disruption in the function and balance of the proteome, senescence can modify the proper synthesis, folding, quality control, and degradation rate of proteins producing, in some diseases, misfolded proteins or aggregation of abnormal proteins. There is an extensive body of literature that associates cellular senescence with several neurodegenerative disorders including Alzheimer’s disease (AD), Down syndrome (DS), and Parkinson’s disease (PD). This review summarizes the evidence of the shared neuropathological events in these neurodegenerative diseases and the implication of cellular senescence in their onset or aggravation. Understanding the role that cellular senescence plays in them could help to develop new therapeutic strategies.
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Affiliation(s)
- Carmen Martínez-Cué
- Department of Physiology and Pharmacology, Faculty of Medicine, University of Cantabria, Santander, Spain
| | - Noemí Rueda
- Department of Physiology and Pharmacology, Faculty of Medicine, University of Cantabria, Santander, Spain
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13
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Hu H, Chen C, Shi S, Li B, Duan S. The gene mutations and subtelomeric DNA methylation in immunodeficiency, centromeric instability and facial anomalies syndrome. Autoimmunity 2019; 52:192-198. [PMID: 31476899 DOI: 10.1080/08916934.2019.1657846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Immunodeficiency, centromeric instability and facial anomalies syndrome (ICF) is a rare autosomal recessive disorder, which is characteristic of a severe impairment of immunity. In the genetic aspect, ICF is featured with mutations primarily located in the specific genes (DNMT3B for ICF1, ZBTB24 for ICF2, CDCA7 for ICF3, and HELLS for ICF4). The subtelomeric region is defined as 500 kb at the terminal of each autosomal arm. And subtelomeric DNA fragments can partially regulate key biological activities, including chromosome movement and localization in the nucleus. In this review, we updated and summarized gene mutations in ICF based on the previous review. In addition, we focused on the correlation between subtelomeric DNA methylation and ICF. The relationship between subtelomeric methylation and telomere length in ICF was also summarized.
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Affiliation(s)
- Haochang Hu
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - Chujia Chen
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - Shanping Shi
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - Bin Li
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - Shiwei Duan
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
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14
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Baroli B, Loi E, Solari P, Kasture A, Moi L, Muroni P, Kasture S, Setzu MD, Liscia A, Zavattari P. Evaluation of oxidative stress mechanisms and the effects of phytotherapic extracts on Parkinson's disease Drosophila PINK1B9 model. FASEB J 2019; 33:11028-11034. [PMID: 31291788 DOI: 10.1096/fj.201901010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Oxidative stress is commonly observed in both idiopathic and genetic cases of Parkinson's disease (PD). It plays an important role in the degeneration of dopaminergic neurons, and it has been associated with altered telomere length (TL). There is currently no cure for PD, and extracts of antioxidative plant, such as Mucuna pruriens and Withania somnifera, are commonly used in Ayurveda to treat patients with PD. In this study, we evaluated 2 enzymatic markers of oxidative stress, glutathione (GSH) system and superoxide dismutase (SOD), and TL in a Drosophila melanogaster model for PD [phosphatase and tensin homolog-induced putative kinase 1 (PINK1)B9]. This evaluation was also performed after treatment with the phytoextracts. PINK1B9 mutants showed a decrease in GSH amount and SOD activity and unexpected longer telomeres compared with wild-type flies. M. pruriens treatment seemed to have a beneficial effect on the oxidative stress conditions. On the other hand, W. somnifera treatment did not show any improvements in the studied oxidative stress mechanisms and even seemed to favor the selection of flies with longer telomeres. In summary, our study suggests the importance of testing antioxidant phytoextracts in a PINK1B9 model to identify beneficial effects for PD.-Baroli, B., Loi, E., Solari, P., Kasture, A., Moi, L., Muroni, P., Kasture, S., Setzu, M. D., Liscia, A., Zavattari, P. Evaluation of oxidative stress mechanisms and the effects of phytotherapic extracts on Parkinson's disease Drosophila PINK1B9 model.
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Affiliation(s)
- Biancamaria Baroli
- Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy
| | - Eleonora Loi
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Paolo Solari
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Ameya Kasture
- Department of Neurobiology, University of Vienna, Vienna, Austria
| | - Loredana Moi
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Patrizia Muroni
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | | | | | - Anna Liscia
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Patrizia Zavattari
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
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15
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Hu H, Li B, Duan S. The Alteration of Subtelomeric DNA Methylation in Aging-Related Diseases. Front Genet 2019; 9:697. [PMID: 30687384 PMCID: PMC6333653 DOI: 10.3389/fgene.2018.00697] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 12/12/2018] [Indexed: 12/20/2022] Open
Abstract
The telomere is located at the end of the chromosome and consists of a non-coding, repetitive DNA sequence. As the cell divides, the length of telomere gradually decreases. A very short telomere can terminate mitosis, and thus telomere length becomes a hallmark of cellular aging. The 500 kb region of each autosomal arm terminal is the so-called subtelomeric region. Both telomere and subtelomere have high-density DNA repeats. Telomeres do not contain genes or CpG sequences, while subtelomeres contain small amounts of genes and high-density CpG sequences, and DNA methylation often occurs in subtelomeres. Previous studies have shown that aberrant methylation of subtelomeric DNA exists in many diseases, and it has a certain effect on the regulation of telomere length. In this review, we focus on the correlation between subtelomeric DNA methylation and aging-related diseases. We also summarize the relationship between subtelomeric methylation and telomere length in different diseases.
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Affiliation(s)
- Haochang Hu
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, China
| | - Bin Li
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, China
| | - Shiwei Duan
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, China
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16
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Kritsilis M, V Rizou S, Koutsoudaki PN, Evangelou K, Gorgoulis VG, Papadopoulos D. Ageing, Cellular Senescence and Neurodegenerative Disease. Int J Mol Sci 2018; 19:E2937. [PMID: 30261683 PMCID: PMC6213570 DOI: 10.3390/ijms19102937] [Citation(s) in RCA: 233] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 09/16/2018] [Accepted: 09/19/2018] [Indexed: 01/10/2023] Open
Abstract
Ageing is a major risk factor for developing many neurodegenerative diseases. Cellular senescence is a homeostatic biological process that has a key role in driving ageing. There is evidence that senescent cells accumulate in the nervous system with ageing and neurodegenerative disease and may predispose a person to the appearance of a neurodegenerative condition or may aggravate its course. Research into senescence has long been hindered by its variable and cell-type specific features and the lack of a universal marker to unequivocally detect senescent cells. Recent advances in senescence markers and genetically modified animal models have boosted our knowledge on the role of cellular senescence in ageing and age-related disease. The aim now is to fully elucidate its role in neurodegeneration in order to efficiently and safely exploit cellular senescence as a therapeutic target. Here, we review evidence of cellular senescence in neurons and glial cells and we discuss its putative role in Alzheimer's disease, Parkinson's disease and multiple sclerosis and we provide, for the first time, evidence of senescence in neurons and glia in multiple sclerosis, using the novel GL13 lipofuscin stain as a marker of cellular senescence.
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Affiliation(s)
- Marios Kritsilis
- Laboratory of Histology & Embryology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Street, Goudi, 115-27 Athens, Greece.
| | - Sophia V Rizou
- Laboratory of Histology & Embryology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Street, Goudi, 115-27 Athens, Greece.
| | - Paraskevi N Koutsoudaki
- Laboratory of Histology & Embryology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Street, Goudi, 115-27 Athens, Greece.
| | - Konstantinos Evangelou
- Laboratory of Histology & Embryology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Street, Goudi, 115-27 Athens, Greece.
| | - Vassilis G Gorgoulis
- Laboratory of Histology & Embryology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Street, Goudi, 115-27 Athens, Greece.
| | - Dimitrios Papadopoulos
- Laboratory of Histology & Embryology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Street, Goudi, 115-27 Athens, Greece.
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17
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Vera E, Bosco N, Studer L. Generating Late-Onset Human iPSC-Based Disease Models by Inducing Neuronal Age-Related Phenotypes through Telomerase Manipulation. Cell Rep 2017; 17:1184-1192. [PMID: 27760320 DOI: 10.1016/j.celrep.2016.09.062] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 08/19/2016] [Accepted: 09/20/2016] [Indexed: 12/21/2022] Open
Abstract
Modeling late-onset disorders such as Parkinson's disease (PD) using iPSC technology remains a challenge, as current differentiation protocols yield cells with the properties of fetal-stage cells. Here, we tested whether it is possible to accelerate aging in vitro to trigger late-onset disease phenotypes in an iPSC model of PD. In order to manipulate a factor that is involved in natural aging as well as in premature aging syndromes, we used telomere shortening as an age-inducing tool. We show that shortened telomeres result in age-associated as well as potentially disease-associated phenotypes in human pluripotent stem cell (hPSC)-derived midbrain dopamine (mDA) neurons. Our approach provides proof of concept for the further validation of telomere shortening as an induced-aging tool for late-onset-disease modeling.
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Affiliation(s)
- Elsa Vera
- Center for Stem Cell Biology, Sloan-Kettering Institute, 1275 York Ave., New York, NY 10065, USA; Developmental Biology Program, Sloan-Kettering Institute, 1275 York Ave., New York, NY 10065, USA.
| | - Nazario Bosco
- Laboratory for Cell Biology and Genetics, The Rockefeller University, 1230 York Avenue, Box 159, New York, NY 10065, USA
| | - Lorenz Studer
- Center for Stem Cell Biology, Sloan-Kettering Institute, 1275 York Ave., New York, NY 10065, USA; Developmental Biology Program, Sloan-Kettering Institute, 1275 York Ave., New York, NY 10065, USA
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18
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Thanseem I, Viswambharan V, Poovathinal SA, Anitha A. Is telomere length a biomarker of neurological disorders? Biomark Med 2017; 11:799-810. [PMID: 30669856 DOI: 10.2217/bmm-2017-0032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Telomeres are DNA-protein complexes that form protective caps at the termini of chromosomes, maintaining genomic stability. In this review, we provide a comprehensive overview on the usefulness of telomere length (TL) as biomarkers of neurological disorders. The implications of TL in relation to cognitive ability, cognitive aging and cognitive decline in neurodegenerative disorders are also briefly discussed. Our review suggests that at present it is difficult to draw a reliable conclusion regarding the contribution of TL to neurological disorders. Further, it needs to be examined whether leukocyte TL, which is generally considered as a surrogate marker of TL in other tissues, serves as an indicator of central nervous system TL.
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Affiliation(s)
- Ismail Thanseem
- Department of Neurogenetics, Institute for Communicative & Cognitive Neurosciences (ICCONS), Shoranur, Palakkad 679 523, Kerala, India
| | - Vijitha Viswambharan
- Department of Neurogenetics, Institute for Communicative & Cognitive Neurosciences (ICCONS), Shoranur, Palakkad 679 523, Kerala, India
| | - Suresh A Poovathinal
- Department of Neurology, Institute for Communicative & Cognitive Neurosciences (ICCONS), Shoranur, Palakkad 679 523, Kerala, India
| | - Ayyappan Anitha
- Department of Neurogenetics, Institute for Communicative & Cognitive Neurosciences (ICCONS), Shoranur, Palakkad 679 523, Kerala, India
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19
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Horvath S, Ritz BR. Increased epigenetic age and granulocyte counts in the blood of Parkinson's disease patients. Aging (Albany NY) 2016; 7:1130-42. [PMID: 26655927 PMCID: PMC4712337 DOI: 10.18632/aging.100859] [Citation(s) in RCA: 262] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
It has been a long standing hypothesis that blood tissue of PD Parkinson's disease (PD) patients may exhibit signs of accelerated aging. Here we use DNA methylation based biomarkers of aging (“epigenetic clock”) to assess the aging rate of blood in two ethnically distinct case-control data sets. Using n=508 Caucasian and n=84 Hispanic blood samples, we assess a) the intrinsic epigenetic age acceleration of blood (IEAA), which is independent of blood cell counts, and b) the extrinsic epigenetic age acceleration rate of blood (EEAA) which is associated with age dependent changes in blood cell counts. Blood of PD subjects exhibits increased age acceleration according to both IEAA (p=0.019) and EEAA (p=6.1×10−3). We find striking differences in imputed blood cell counts between PD cases and controls. Compared to control subjects, PD subjects contains more granulocytes (p=1.0×10−9 in Caucasians, p=0.00066 in Hispanics) but fewer T helper cells (p=1.4×10−6 in Caucasians, p=0.0024 in Hispanics) and fewer B cells (p=1.6×10−5 in Caucasians, p=4.5×10−5 in Hispanics). Overall, this study shows that the epigenetic age of the immune system is significantly increased in PD patients and that granulocytes play a significant role.
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Affiliation(s)
- Steve Horvath
- Department of Human Genetics, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA.,Department of Biostatistics, UCLA Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Beate R Ritz
- Department of Neurology, UCLA School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA.,Department of Epidemiology, UCLA Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA 90095, USA.,Department of Environmental Health, UCLA Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA 90095, USA
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20
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Scheffold A, Holtman IR, Dieni S, Brouwer N, Katz SF, Jebaraj BMC, Kahle PJ, Hengerer B, Lechel A, Stilgenbauer S, Boddeke EWGM, Eggen BJL, Rudolph KL, Biber K. Telomere shortening leads to an acceleration of synucleinopathy and impaired microglia response in a genetic mouse model. Acta Neuropathol Commun 2016; 4:87. [PMID: 27550225 PMCID: PMC4994259 DOI: 10.1186/s40478-016-0364-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 08/11/2016] [Indexed: 12/21/2022] Open
Abstract
Parkinson’s disease is one of the most common neurodegenerative disorders of the elderly and ageing hence described to be a major risk factor. Telomere shortening as a result of the inability to fully replicate the ends of linear chromosomes is one of the hallmarks of ageing. The role of telomere dysfunction in neurological diseases and the ageing brain is not clarified and there is an ongoing discussion whether telomere shortening is linked to Parkinson’s disease. Here we studied a mouse model of Parkinson’s disease (Thy-1 [A30P] α-synuclein transgenic mouse model) in the background of telomere shortening (Terc knockout mouse model). α-synuclein transgenic mice with short telomeres (αSYNtg/tg G3Terc-/-) developed an accelerated disease with significantly decreased survival. This accelerated phenotype of mice with short telomeres was characterized by a declined motor performance and an increased formation of α-synuclein aggregates. Immunohistochemical analysis and mRNA expression studies revealed that the disease end-stage brain stem microglia showed an impaired response in αSYNtg/tg G3Terc-/- microglia animals. These results provide the first experimental data that telomere shortening accelerates α-synuclein pathology that is linked to limited microglia function in the brainstem.
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21
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Wüllner U, Kaut O, deBoni L, Piston D, Schmitt I. DNA methylation in Parkinson's disease. J Neurochem 2016; 139 Suppl 1:108-120. [DOI: 10.1111/jnc.13646] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 03/21/2016] [Accepted: 04/15/2016] [Indexed: 12/29/2022]
Affiliation(s)
- Ullrich Wüllner
- German Center for Neurodegenerative Diseases (DZNE) and Department of Neurology; University of Bonn; Bonn Germany
| | - Oliver Kaut
- German Center for Neurodegenerative Diseases (DZNE) and Department of Neurology; University of Bonn; Bonn Germany
| | - Laura deBoni
- German Center for Neurodegenerative Diseases (DZNE) and Department of Neurology; University of Bonn; Bonn Germany
| | - Dominik Piston
- German Center for Neurodegenerative Diseases (DZNE) and Department of Neurology; University of Bonn; Bonn Germany
| | - Ina Schmitt
- German Center for Neurodegenerative Diseases (DZNE) and Department of Neurology; University of Bonn; Bonn Germany
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22
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Spivak IM, Mikhelson VM, Spivak DL. Telomere length, telomerase activity, stress, and aging. ADVANCES IN GERONTOLOGY 2016. [DOI: 10.1134/s2079057016010136] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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23
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Linkus B, Wiesner D, MeΔner M, Karabatsiakis A, Scheffold A, Rudolph KL, Thal DR, Weishaupt JH, Ludolph AC, Danzer KM. Telomere shortening leads to earlier age of onset in ALS mice. Aging (Albany NY) 2016; 8:382-93. [PMID: 26978042 PMCID: PMC4789589 DOI: 10.18632/aging.100904] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 01/27/2016] [Indexed: 12/11/2022]
Abstract
Telomere shortening has been linked to a variety of neurodegenerative diseases. Recent evidence suggests that reduced telomerase expression results in shorter telomeres in leukocytes from sporadic patients with amyotrophic lateral sclerosis (ALS) compared with healthy controls. Here, we have characterized telomere length in microglia, astroglia and neurons in human post mortem brain tissue from ALS patients and healthy controls. Moreover, we studied the consequences of telomerase deletion in a genetic mouse model for ALS. We found a trend towards longer telomeres in microglia in the brains of ALS patients compared to non-neurologic controls. Knockout of telomerase leading to telomere shortening accelerated the ALS phenotype inSOD1G93A-transgenic mice. Our results suggest that telomerase dysfunction might contribute to the age-related risk for ALS.
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Affiliation(s)
- Birgit Linkus
- Department of Neurology, Ulm University, 89081 Ulm, Germany
| | - Diana Wiesner
- Department of Neurology, Ulm University, 89081 Ulm, Germany
| | - Martina MeΔner
- Department of Neurology, Ulm University, 89081 Ulm, Germany
| | | | - Annika Scheffold
- Department of Internal Medicine III, Ulm University, 89081 Ulm, Germany
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24
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Forero DA, González-Giraldo Y, López-Quintero C, Castro-Vega LJ, Barreto GE, Perry G. Telomere length in Parkinson's disease: A meta-analysis. Exp Gerontol 2016; 75:53-5. [PMID: 26772888 DOI: 10.1016/j.exger.2016.01.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 12/24/2015] [Accepted: 01/04/2016] [Indexed: 12/17/2022]
Abstract
Parkinson's disease (PD) is a common and severe movement disorder. Differences in telomere length (TL) have been reported as possible risk factors for several neuropsychiatric disorders, including PD. Results from published studies for TL in PD are inconsistent, highlighting the need for a meta-analysis. In the current work, a meta-analysis of published studies for TL in PD was carried out. PubMed, Web of Science and Google Scholar databases were used to identify relevant articles that reported TL in groups of PD patients and controls. A random-effects model was used for meta-analytical procedures. The meta-analysis included eight primary studies, derived from populations of European and Asian descent, and did not show a significant difference in TL between 956 PD patients and 1284 controls (p value: 0.246). Our results show that there is no consistent evidence of shorter telomeres in PD patients and suggest the importance of future studies on TL and PD that analyze other populations and also include assessment of TL from different brain regions.
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Affiliation(s)
- Diego A Forero
- Laboratory of Neuropsychiatric Genetics, Biomedical Sciences Research Group, School of Medicine, Universidad Antonio Nariño, Bogotá, Colombia.
| | - Yeimy González-Giraldo
- Departamento de Nutrición y Bioquímica, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Catalina López-Quintero
- Department of Epidemiology and Biostatistics, College of Human Medicine, Michigan State University, East Lansing, MI, United States
| | - Luis J Castro-Vega
- INSERM, UMR970, Paris-Cardiovascular Research Center, F-75015 Paris, France
| | - George E Barreto
- Departamento de Nutrición y Bioquímica, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia; Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Santiago, Chile
| | - George Perry
- College of Sciences, University of Texas at San Antonio, San Antonio, TX, USA
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25
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Bernadotte A, Mikhelson VM, Spivak IM. Markers of cellular senescence. Telomere shortening as a marker of cellular senescence. Aging (Albany NY) 2016; 8:3-11. [PMID: 26805432 PMCID: PMC4761709 DOI: 10.18632/aging.100871] [Citation(s) in RCA: 285] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
The cellular senescence definition comes to the fact of cells irreversible proliferation disability. Besides the cell cycle arrest, senescent cells go through some morphological, biochemical, and functional changes which are the signs of cellular senescence. The senescent cells (including replicative senescence and stress-induced premature senescence) of all the tissues look alike. They are metabolically active and possess the set of characteristics in vitro and in vivo, which are known as biomarkers of aging and cellular senescence. Among biomarkers of cellular senescence telomere shortening is a rather elegant frequently used biomarker. Validity of telomere shortening as a marker for cellular senescence is based on theoretical and experimental data.
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Affiliation(s)
- Alexandra Bernadotte
- Karolinska Institute, Department of Medical Biochemistry and Biophysics, Stockholm, 14157, Sweden
- St. Petersburg Institute of Bioregulation and Gerontology, Russian Academy of Sciences, Saint-Petersburg, 197110 Russia
| | - Victor M. Mikhelson
- Institute of Cytology, Russian Academy of Sciences, Saint-Petersburg, 194064, Russia
| | - Irina M. Spivak
- Institute of Cytology, Russian Academy of Sciences, Saint-Petersburg, 194064, Russia
- Saint-Petersburg's State University, Saint-Petersburg, 199034, Russia
- Saint-Petersburg's Polytechnic State University, Saint-Petersburg, 195251 Russia
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26
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Maltby VE, Graves MC, Lea RA, Benton MC, Sanders KA, Tajouri L, Scott RJ, Lechner-Scott J. Genome-wide DNA methylation profiling of CD8+ T cells shows a distinct epigenetic signature to CD4+ T cells in multiple sclerosis patients. Clin Epigenetics 2015; 7:118. [PMID: 26550040 PMCID: PMC4635618 DOI: 10.1186/s13148-015-0152-7] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Accepted: 10/29/2015] [Indexed: 01/20/2023] Open
Abstract
Background Multiple sclerosis (MS) is thought to be a T cell-mediated autoimmune disorder. MS pathogenesis is likely due to a genetic predisposition triggered by a variety of environmental factors. Epigenetics, particularly DNA methylation, provide a logical interface for environmental factors to influence the genome. In this study we aim to identify DNA methylation changes associated with MS in CD8+ T cells in 30 relapsing remitting MS patients and 28 healthy blood donors using Illumina 450K methylation arrays. Findings Seventy-nine differentially methylated CpGs were associated with MS. The methylation profile of CD8+ T cells was distinctive from our previously published data on CD4+ T cells in the same cohort. Most notably, there was no major CpG effect at the MS risk gene HLA-DRB1 locus in the CD8+ T cells. Conclusion CD8+ T cells and CD4+ T cells have distinct DNA methylation profiles. This case–control study highlights the importance of distinctive cell subtypes when investigating epigenetic changes in MS and other complex diseases.
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Affiliation(s)
- Vicki E Maltby
- Centre for Information Based Medicine, Hunter Medical Research Institute, Newcastle, Australia.,School of Biomedical Sciences and Pharmacy, University of Newcastle, Newcastle, Australia
| | - Moira C Graves
- Centre for Information Based Medicine, Hunter Medical Research Institute, Newcastle, Australia.,School of Medicine and Public Health, Univeristy of Newcastle, Newcastle, Australia
| | - Rodney A Lea
- Centre for Information Based Medicine, Hunter Medical Research Institute, Newcastle, Australia.,Insitute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
| | - Miles C Benton
- Insitute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
| | - Katherine A Sanders
- Centre for Information Based Medicine, Hunter Medical Research Institute, Newcastle, Australia.,Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia
| | - Lotti Tajouri
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia
| | - Rodney J Scott
- Centre for Information Based Medicine, Hunter Medical Research Institute, Newcastle, Australia.,Division of Molecular Medicine, Pathology North, Newcastle, Australia
| | - Jeannette Lechner-Scott
- Centre for Information Based Medicine, Hunter Medical Research Institute, Newcastle, Australia.,School of Medicine and Public Health, Univeristy of Newcastle, Newcastle, Australia.,Department of Neurology, Devision of Medicine, John Hunter Hospital, Newcastle, Australia
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27
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Degerman S, Domellöf M, Landfors M, Linder J, Lundin M, Haraldsson S, Elgh E, Roos G, Forsgren L. Long leukocyte telomere length at diagnosis is a risk factor for dementia progression in idiopathic parkinsonism. PLoS One 2014; 9:e113387. [PMID: 25501556 PMCID: PMC4264694 DOI: 10.1371/journal.pone.0113387] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 10/25/2014] [Indexed: 11/19/2022] Open
Abstract
Telomere length (TL) is regarded as a marker of cellular aging due to the gradual shortening by each cell division, but is influenced by a number of factors including oxidative stress and inflammation. Parkinson's disease and atypical forms of parkinsonism occur mainly in the elderly, with oxidative stress and inflammation in afflicted cells. In this study the relationship between blood TL and prognosis of 168 patients with idiopathic parkinsonism (136 Parkinson's disease [PD], 17 Progressive Supranuclear Palsy [PSP], and 15 Multiple System Atrophy [MSA]) and 30 controls was investigated. TL and motor and cognitive performance were assessed at baseline (diagnosis) and repeatedly up to three to five years follow up. No difference in TL between controls and patients was shown at baseline, nor any significant difference in TL stability or attrition during follow up. Interestingly, a significant relationship between TL at diagnosis and cognitive phenotype at follow up in PD and PSP patients was found, with longer mean TL at diagnosis in patients that developed dementia within three years.
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Affiliation(s)
- Sofie Degerman
- Department of Medical Biosciences, Umeå University, Umeå, Sweden
- * E-mail:
| | - Magdalena Domellöf
- Department of Pharmacology and Clinical Neuroscience, Umeå University, Umeå, Sweden
| | - Mattias Landfors
- Department of Medical Biosciences, Umeå University, Umeå, Sweden
| | - Jan Linder
- Department of Pharmacology and Clinical Neuroscience, Umeå University, Umeå, Sweden
| | | | | | - Eva Elgh
- Department of Community Medicine and Rehabilitation, Umeå University, Umeå, Sweden
| | - Göran Roos
- Department of Medical Biosciences, Umeå University, Umeå, Sweden
| | - Lars Forsgren
- Department of Pharmacology and Clinical Neuroscience, Umeå University, Umeå, Sweden
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28
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Abstract
In this manuscript we summarize the role of chronic stress as a potential trigger factor for Parkinson's disease. Underlying mechanisms and stress-induced changes to the neuronal networks have been highlighted. Examples of stress induced reversible symptoms that resemble parkinsonism in humans and in animal models raise the question whether emotional stress can cause striatal degeneration in susceptible patients. A Pubmed literature review searching for the terms 'Stress', 'Distress and Parkinson's disease', 'Emotional Distress and Parkinson's disease', 'Stress and Parkinson's disease', 'Prodromal Parkinson's disease', 'Non motor symptoms and Parkinson's disease', 'Paradoxical kinesia', 'Psychogenic parkinsonism', 'Functional somatic syndromes', 'Chronic fatigue syndrome', 'Irritable bowel syndrome', 'Fibromyalgia', 'Dopamine and fibromyalgia', 'Dopamine and chronic fatigue syndrome' and 'Dopamine and irritable bowel syndrome' was carried out until April 2013. Articles were also identified through searches of the authors' own files. Only papers published in English were reviewed. The final reference list was generated on the basis of originality and relevance to the broad scope of this viewpoint.
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Affiliation(s)
- Atbin Djamshidian
- The National Hospital for Neurology and Neurosurgery, Queen Square and the Reta Lila Weston Institute of Neurological Studies, UCL, London, UK
| | - Andrew J Lees
- The National Hospital for Neurology and Neurosurgery, Queen Square and the Reta Lila Weston Institute of Neurological Studies, UCL, London, UK
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29
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Eitan E, Hutchison ER, Mattson MP. Telomere shortening in neurological disorders: an abundance of unanswered questions. Trends Neurosci 2014; 37:256-63. [PMID: 24698125 PMCID: PMC4008659 DOI: 10.1016/j.tins.2014.02.010] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 02/24/2014] [Accepted: 02/25/2014] [Indexed: 11/24/2022]
Abstract
Telomeres, ribonucleoprotein complexes that cap eukaryotic chromosomes, typically shorten in leukocytes with aging. Aging is a primary risk factor for neurodegenerative disease (ND), and a common assumption has arisen that leukocyte telomere length (LTL) can serve as a predictor of neurological disease. However, the evidence for shorter LTL in Alzheimer's and Parkinson's patients is inconsistent. The diverse causes of telomere shortening may explain variability in LTL between studies and individuals. Additional research is needed to determine whether neuronal and glial telomeres shorten during aging and in neurodegenerative disorders, if and how LTL is related to brain cell telomere shortening, and whether telomere shortening plays a causal role in or exacerbates neurological disorders.
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Affiliation(s)
- Erez Eitan
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224, USA
| | - Emmette R Hutchison
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224, USA
| | - Mark P Mattson
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224, USA; Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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30
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Gaweda-Walerych K, Zekanowski C. The impact of mitochondrial DNA and nuclear genes related to mitochondrial functioning on the risk of Parkinson's disease. Curr Genomics 2014; 14:543-59. [PMID: 24532986 PMCID: PMC3924249 DOI: 10.2174/1389202914666131210211033] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 07/30/2013] [Accepted: 08/29/2013] [Indexed: 12/21/2022] Open
Abstract
Mitochondrial dysfunction and oxidative stress are the major factors implicated in Parkinson’s disease (PD)
pathogenesis. The maintenance of healthy mitochondria is a very complex process coordinated bi-genomically. Here, we
review association studies on mitochondrial haplogroups and subhaplogroups, discussing the underlying molecular
mechanisms. We also focus on variation in the nuclear genes (NDUFV2, PGC-1alpha, HSPA9, LRPPRC, MTIF3,
POLG1, and TFAM encoding NADH dehydrogenase (ubiquinone) flavoprotein 2, peroxisome proliferator-activated receptor
gamma coactivator 1-alpha, mortalin, leucine-rich pentatricopeptide repeat containing protein, translation initiation
factor 3, mitochondrial DNA polymerase gamma, and mitochondrial transcription factor A, respectively) primarily linked
to regulation of mitochondrial functioning that recently have been associated with PD risk. Possible interactions between
mitochondrial and nuclear genetic variants and related proteins are discussed.
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Affiliation(s)
- Katarzyna Gaweda-Walerych
- Laboratory of Neurogenetics, Mossakowski Medical Research Centre, Polish Academy of Sciences, Pawinskiego 5 str., 02-106 Warszawa, Poland
| | - Cezary Zekanowski
- Laboratory of Neurogenetics, Mossakowski Medical Research Centre, Polish Academy of Sciences, Pawinskiego 5 str., 02-106 Warszawa, Poland
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31
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Ghavami S, Shojaei S, Yeganeh B, Ande SR, Jangamreddy JR, Mehrpour M, Christoffersson J, Chaabane W, Moghadam AR, Kashani HH, Hashemi M, Owji AA, Łos MJ. Autophagy and apoptosis dysfunction in neurodegenerative disorders. Prog Neurobiol 2013; 112:24-49. [PMID: 24211851 DOI: 10.1016/j.pneurobio.2013.10.004] [Citation(s) in RCA: 722] [Impact Index Per Article: 65.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2012] [Revised: 10/08/2013] [Accepted: 10/15/2013] [Indexed: 12/12/2022]
Abstract
Autophagy and apoptosis are basic physiologic processes contributing to the maintenance of cellular homeostasis. Autophagy encompasses pathways that target long-lived cytosolic proteins and damaged organelles. It involves a sequential set of events including double membrane formation, elongation, vesicle maturation and finally delivery of the targeted materials to the lysosome. Apoptotic cell death is best described through its morphology. It is characterized by cell rounding, membrane blebbing, cytoskeletal collapse, cytoplasmic condensation, and fragmentation, nuclear pyknosis, chromatin condensation/fragmentation, and formation of membrane-enveloped apoptotic bodies, that are rapidly phagocytosed by macrophages or neighboring cells. Neurodegenerative disorders are becoming increasingly prevalent, especially in the Western societies, with larger percentage of members living to an older age. They have to be seen not only as a health problem, but since they are care-intensive, they also carry a significant economic burden. Deregulation of autophagy plays a pivotal role in the etiology and/or progress of many of these diseases. Herein, we briefly review the latest findings that indicate the involvement of autophagy in neurodegenerative diseases. We provide a brief introduction to autophagy and apoptosis pathways focusing on the role of mitochondria and lysosomes. We then briefly highlight pathophysiology of common neurodegenerative disorders like Alzheimer's diseases, Parkinson's disease, Huntington's disease and Amyotrophic lateral sclerosis. Then, we describe functions of autophagy and apoptosis in brain homeostasis, especially in the context of the aforementioned disorders. Finally, we discuss different ways that autophagy and apoptosis modulation may be employed for therapeutic intervention during the maintenance of neurodegenerative disorders.
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Affiliation(s)
- Saeid Ghavami
- Department of Human Anatomy and Cell Science, University of Manitoba, Winnipeg, Canada; Manitoba Institute of Child Health, Department of Physiology, University of Manitoba, Winnipeg, Canada; St. Boniface Research Centre, University of Manitoba, Winnipeg, Canada
| | - Shahla Shojaei
- Department of Biochemistry, Recombinant Protein Laboratory, Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Behzad Yeganeh
- Manitoba Institute of Child Health, Department of Physiology, University of Manitoba, Winnipeg, Canada; Hospital for Sick Children Research Institute, Department of Physiology and Experimental Medicine, University of Toronto, Canada
| | - Sudharsana R Ande
- Department of Internal Medicine, University of Manitoba, Winnipeg, Canada
| | - Jaganmohan R Jangamreddy
- Department of Clinical and Experimental Medicine (IKE), Integrative Regenerative Medicine Center (IGEN), Division of Cell Biology, Linkoping University, Linkoping, Sweden
| | - Maryam Mehrpour
- INSERM U845, Research Center "Growth & Signaling" Paris Descartes University Medical School, France
| | - Jonas Christoffersson
- Department of Clinical and Experimental Medicine (IKE), Integrative Regenerative Medicine Center (IGEN), Division of Cell Biology, Linkoping University, Linkoping, Sweden
| | - Wiem Chaabane
- Department of Clinical and Experimental Medicine (IKE), Integrative Regenerative Medicine Center (IGEN), Division of Cell Biology, Linkoping University, Linkoping, Sweden; Department of Biology, Faculty of Sciences, Tunis University, Tunis, Tunisia
| | | | - Hessam H Kashani
- Department of Human Anatomy and Cell Science, University of Manitoba, Winnipeg, Canada; Manitoba Institute of Child Health, Department of Physiology, University of Manitoba, Winnipeg, Canada
| | - Mohammad Hashemi
- Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran; Cellular and Molecular Biology Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Ali A Owji
- Department of Biochemistry, Recombinant Protein Laboratory, Medical School, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Marek J Łos
- Department of Clinical and Experimental Medicine (IKE), Integrative Regenerative Medicine Center (IGEN), Division of Cell Biology, Linkoping University, Linkoping, Sweden.
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32
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Anderson G, Maes M. Neurodegeneration in Parkinson's disease: interactions of oxidative stress, tryptophan catabolites and depression with mitochondria and sirtuins. Mol Neurobiol 2013; 49:771-83. [PMID: 24085563 DOI: 10.1007/s12035-013-8554-z] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 09/19/2013] [Indexed: 11/29/2022]
Abstract
The biological underpinnings to the etiology and course of neurodegeneration in Parkinson's disease are an area of extensive research that has yet to produce an early biological marker or disease-slowing or preventative treatment. Recent conceptualizations of Parkinson's disease have integrated immuno-inflammation and oxidative and nitrosative stress occurring in depression, somatization and peripheral inflammation into the course of Parkinson's disease. We review the data showing the importance of immuno-inflammatory processes and oxidative and nitrosative stress in such classically conceived 'comorbidities', suggesting that lifetime, prodromal and concurrent depression and somatization may be intricately involved in the etiology and course of Parkinson's disease, rather than psychiatric comorbidities. This produces a longer term developmental perspective of Parkinson's disease, which incorporates tryptophan catabolites (TRYCATs), lipid peroxidation, sirtuins, cyclic adenosine monophosphate, aryl hydrocarbon receptor, and circadian genes. This integrates wider bodies of data pertaining to neuronal loss in Parkinson's disease, emphasizing how these interact with susceptibility genes to drive changes in mitochondria, blood-brain barrier permeability and intercellular signalling. We review this data here in the context of neurodegeneration in Parkinson's disease and to the future directions indicated for slowing disease progression.
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33
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Thijssen PE, Tobi EW, Balog J, Schouten SG, Kremer D, El Bouazzaoui F, Henneman P, Putter H, Eline Slagboom P, Heijmans BT, van der Maarel SM. Chromatin remodeling of human subtelomeres and TERRA promoters upon cellular senescence: commonalities and differences between chromosomes. Epigenetics 2013; 8:512-21. [PMID: 23644601 PMCID: PMC3741221 DOI: 10.4161/epi.24450] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Subtelomeres are patchworks of evolutionary conserved sequence blocks and harbor the transcriptional start sites for telomere repeat containing RNAs (TERRA). Recent studies suggest that the interplay between telomeres and subtelomeric chromatin is required for maintaining telomere function. To further characterize chromatin remodeling of subtelomeres in relation to telomere shortening and cellular senescence, we systematically quantified histone modifications and DNA methylation at the subtelomeres of chromosomes 7q and 11q in primary human WI-38 fibroblasts. Upon senescence, both subtelomeres were characterized by a decrease in markers of constitutive heterochromatin, suggesting relative chromatin relaxation. However, we did not find increased levels of markers of euchromatin or derepression of the 7q VIPR2 gene. The repressed state of the subtelomeres was maintained upon senescence, which could be attributed to a rise in levels of facultative heterochromatin markers at both subtelomeres. While senescence-induced subtelomeric chromatin remodeling was similar for both chromosomes, chromatin remodeling at TERRA promoters displayed chromosome-specific patterns. At the 7q TERRA promoter, chromatin structure was co-regulated with the more proximal subtelomere. In contrast, the 11q TERRA promoter, which was previously shown to be bound by CCCTC-binding factor CTCF, displayed lower levels of markers of constitutive heterochromatin that did not change upon senescence, whereas levels of markers of facultative heterochromatin decreased upon senescence. In line with the chromatin state data, transcription of 11q TERRA but not 7q TERRA was detected. Our study provides a detailed description of human subtelomeric chromatin dynamics and shows distinct regulation of the TERRA promoters of 7q and 11q upon cellular senescence.
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Affiliation(s)
- Peter E Thijssen
- Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands
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