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Saha P, Ajgaonkar S, Maniar D, Sahare S, Mehta D, Nair S. Current insights into transcriptional role(s) for the nutraceutical Withania somnifera in inflammation and aging. Front Nutr 2024; 11:1370951. [PMID: 38765810 PMCID: PMC11099240 DOI: 10.3389/fnut.2024.1370951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 04/15/2024] [Indexed: 05/22/2024] Open
Abstract
The health-beneficial effects of nutraceuticals in various diseases have received enhanced attention in recent years. Aging is a continuous process wherein physiological activity of an individual declines over time and is characterized by various indefinite hallmarks which contribute toward aging-related comorbidities in an individual which include many neurodegenerative diseases, cardiac problems, diabetes, bone-degeneration, and cancer. Cellular senescence is a homeostatic biological process that has an important function in driving aging. Currently, a growing body of evidence substantiates the connection between epigenetic modifications and the aging process, along with aging-related diseases. These modifications are now being recognized as promising targets for emerging therapeutic interventions. Considering that almost all the biological processes are modulated by RNAs, numerous RNA-binding proteins have been found to be linked to aging and age-related complexities. Currently, studies have shed light on the ability of the nutraceutical Withania somnifera (Ashwagandha) to influence RNA expression, stability, and processing, offering insights into its mechanisms of action. By targeting RNA-related pathways, Withania somnifera may exhibit promising effects in ameliorating age-associated molecular changes, which include modifications in gene expression and signaling networks. This review summarizes the potential role of Withania somnifera as a nutraceutical in modulating RNA-level changes associated with aging, encompassing both in vitro and in vivo studies. Taken together, the putative role(s) of Withania in modulation of key RNAs will provide insights into understanding the aging process and facilitate the development of various preventive and therapeutic strategies employing nutraceuticals for healthy aging.
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Affiliation(s)
- Praful Saha
- PhytoVeda Pvt. Ltd., Mumbai, India
- Viridis Biopharma Pvt. Ltd., Mumbai, India
| | - Saiprasad Ajgaonkar
- PhytoVeda Pvt. Ltd., Mumbai, India
- Viridis Biopharma Pvt. Ltd., Mumbai, India
| | - Dishant Maniar
- PhytoVeda Pvt. Ltd., Mumbai, India
- Viridis Biopharma Pvt. Ltd., Mumbai, India
| | - Simran Sahare
- PhytoVeda Pvt. Ltd., Mumbai, India
- Viridis Biopharma Pvt. Ltd., Mumbai, India
| | - Dilip Mehta
- PhytoVeda Pvt. Ltd., Mumbai, India
- Viridis Biopharma Pvt. Ltd., Mumbai, India
| | - Sujit Nair
- PhytoVeda Pvt. Ltd., Mumbai, India
- Viridis Biopharma Pvt. Ltd., Mumbai, India
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Tague LK, Oetjen KA, Mahadev A, Walter MJ, Anthony H, Kreisel D, Link DC, Gelman AE. Increased clonal hematopoiesis involving DNA damage response genes in patients undergoing lung transplantation. JCI Insight 2023; 8:e165609. [PMID: 36853803 PMCID: PMC10132147 DOI: 10.1172/jci.insight.165609] [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: 11/14/2022] [Accepted: 02/21/2023] [Indexed: 03/01/2023] Open
Abstract
BACKGROUNDCellular stressors influence the development of clonal hematopoiesis (CH). We hypothesized that environmental, inflammatory, and genotoxic stresses drive the emergence of CH in lung transplant recipients. METHODSWe performed a cross-sectional cohort study of 85 lung transplant recipients to characterize CH prevalence. We evaluated somatic variants using duplex error-corrected sequencing and germline variants using whole exome sequencing. We evaluated CH frequency and burden using χ2 and Poisson regression, and we evaluated associations with clinical and demographic variables and clinical outcomes using χ2, logistic regression, and Cox regression. RESULTSCH in DNA damage response (DDR) genes TP53, PPM1D, and ATM was increased in transplant recipients compared with a control group of older adults (28% versus 0%, adjusted OR [aOR], 12.9 [1.7-100.3], P = 0.0002). Age (OR, 1.13 [1.03-1.25], P = 0.014) and smoking history (OR 4.25 [1.02-17.82], P = 0.048) were associated with DDR CH. Germline variants predisposing to idiopathic pulmonary fibrosis were identified but not associated with CH. DDR CH was associated with increased cytomegalovirus viremia versus patients with no (OR, 7.23 [1.95-26.8], P = 0.018) or non-DDR CH (OR, 7.64 [1.77-32.89], P = 0.024) and mycophenolate discontinuation (aOR, 3.8 [1.3-12.9], P = 0.031). CONCLUSIONCH in DDR genes is prevalent in lung transplant recipients and is associated with posttransplant outcomes including cytomegalovirus activation and mycophenolate intolerance. FUNDINGNIH/NHLBI K01HL155231 (LKT), R25HL105400 (LKT), Foundation for Barnes-Jewish Hospital (LKT), Evans MDS Center at Washington University (KAO, MJW), ASH Scholar Award (KAO), NIH K12CA167540 (KAO), NIH P01AI116501 (AEG, DK), NIH R01HL094601 (AEG), and NIH P01CA101937 (DCL).
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Affiliation(s)
| | - Karolyn A. Oetjen
- Division of Oncology, Section of Stem Cell Biology, Department of Medicine, Washington University in St. Louis, St. Louis, Missouri, USA
| | | | - Matthew J. Walter
- Division of Oncology, Section of Stem Cell Biology, Department of Medicine, Washington University in St. Louis, St. Louis, Missouri, USA
| | | | - Daniel Kreisel
- Department of Surgery, Division of Cardiothoracic Surgery, and
| | - Daniel C. Link
- Division of Oncology, Section of Stem Cell Biology, Department of Medicine, Washington University in St. Louis, St. Louis, Missouri, USA
- Department of Pathology & Immunology, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Andrew E. Gelman
- Department of Surgery, Division of Cardiothoracic Surgery, and
- Department of Pathology & Immunology, Washington University in St. Louis, St. Louis, Missouri, USA
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Telomere Length Changes in Cancer: Insights on Carcinogenesis and Potential for Non-Invasive Diagnostic Strategies. Genes (Basel) 2023; 14:genes14030715. [PMID: 36980987 PMCID: PMC10047978 DOI: 10.3390/genes14030715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/17/2023] Open
Abstract
Telomere dynamics play a crucial role in the maintenance of chromosome integrity; changes in telomere length may thus contribute to the development of various diseases including cancer. Understanding the role of telomeric DNA in carcinogenesis and detecting the presence of cell-free telomeric DNA (cf-telDNA) in body fluids offer a potential biomarker for novel cancer screening and diagnostic strategies. Liquid biopsy is becoming increasingly popular due to its undeniable benefits over conventional invasive methods. However, the organization and function of cf-telDNA in the extracellular milieu are understudied. This paper provides a review based on 3,398,017 cancer patients, patients with other conditions, and control individuals with the aim to shed more light on the inconsistent nature of telomere lengthening/shortening in oncological contexts. To gain a better understanding of biological factors (e.g., telomerase activation, alternative lengthening of telomeres) affecting telomere homeostasis across different types of cancer, we summarize mechanisms responsible for telomere length maintenance. In conclusion, we compare tissue- and liquid biopsy-based approaches in cancer assessment and provide a brief outlook on the methodology used for telomere length evaluation, highlighting the advances of state-of-the-art approaches in the field.
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Andrographis paniculata extract as an immunity modulator against cancer via telomerase inhibition. 3 Biotech 2022; 12:319. [PMID: 36245958 PMCID: PMC9549450 DOI: 10.1007/s13205-022-03373-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 09/20/2022] [Indexed: 11/04/2022] Open
Abstract
In accordance with the importance of telomerase inhibition as a potential target in cancer therapy, and increasing reports on the association between short telomeres and severe COVID-19 symptoms as well as extensive application of Andrographis paniculata as a remedy for both cancer and SARS-CoV-2, the present study aimed at investigating the impact of the plant’s extracts on telomerase activity (as an important enzyme regulating telomere length). Telomerase inhibition in MCF-7 cells treated with the Dichloromethane, ethanol, water, and methanol extracts of A. paniculata was assessed using Telomerase Repeated Amplification Protocol (TRAP). The above-mentioned extracts inhibited telomerase by 80.3 ± 1.4%, 78.5 ± 1.35%, 77.5 ± 1.81%, and 73.7 ± 1.81%, respectively. Furthermore, the flow cytometry analysis showed that the water and methanol extracts induced higher rates of total apoptosis by 32.8% and 25%, respectively, compared with dichloromethane (10.07%) and ethanol (10.7%) extracts. The inhibitory effect of A. paniculata on telomerase activity can be considered as a potential immunity modulator in cancer therapy; however, telomerase inhibition as a safe approach to SARS-CoV-2 is arguable. Two mechanisms can be considered accordingly; (a) reducing the existing population of short telomeres via telomerase inhibition in cancer cells (arresting proliferation and finally cell death) may decrease the susceptibility against SARS-CoV-2, especially in cancer patients or patients prone to cancer, and (b) increasing the population of short telomeres via telomerase inhibition in normal/somatic cells may increase the susceptibility against SARS-CoV-2. Therefore, the telomerase inhibition of A. paniculata as an immunity modulator in cancer and COVID-19 should be investigated, carefully.
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Telomeres and Cancer. Life (Basel) 2021; 11:life11121405. [PMID: 34947936 PMCID: PMC8704776 DOI: 10.3390/life11121405] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/01/2021] [Accepted: 12/06/2021] [Indexed: 12/18/2022] Open
Abstract
Telomeres cap the ends of eukaryotic chromosomes and are indispensable chromatin structures for genome protection and replication. Telomere length maintenance has been attributed to several functional modulators, including telomerase, the shelterin complex, and the CST complex, synergizing with DNA replication, repair, and the RNA metabolism pathway components. As dysfunctional telomere maintenance and telomerase activation are associated with several human diseases, including cancer, the molecular mechanisms behind telomere length regulation and protection need particular emphasis. Cancer cells exhibit telomerase activation, enabling replicative immortality. Telomerase reverse transcriptase (TERT) activation is involved in cancer development through diverse activities other than mediating telomere elongation. This review describes the telomere functions, the role of functional modulators, the implications in cancer development, and the future therapeutic opportunities.
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Wang P, Leung J, Lam A, Lee S, Calabrese DR, Hays SR, Golden JA, Kukreja J, Singer JP, Wolters PJ, Tang Q, Greenland JR. Lung transplant recipients with idiopathic pulmonary fibrosis have impaired alloreactive immune responses. J Heart Lung Transplant 2021; 41:641-653. [PMID: 34924263 PMCID: PMC9038662 DOI: 10.1016/j.healun.2021.11.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 11/08/2021] [Accepted: 11/17/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Telomere dysfunction is associated with idiopathic pulmonary fibrosis (IPF) and worse outcomes following lung transplantation. Telomere dysfunction may impair immunity by upregulating p53 and arresting proliferation, but its influence on allograft-specific immune responses is unknown. We hypothesized that subjects undergoing lung transplantation for IPF would have impaired T cell proliferation to donor antigens. METHODS We analyzed peripheral blood mononuclear cells (PBMC) from 14 IPF lung transplant recipients and 12 age-matched non-IPF subjects, before and 2 years after transplantation, as well as PBMC from 9 non-transplant controls. We quantified T cell proliferation and cytokine secretion to donor antigens. Associations between PBMC telomere length, measured by quantitative PCR, and T cell proliferation to alloantigens were evaluated with generalized estimating equation models. RESULTS IPF subjects demonstrated impaired CD8+ T cell proliferation to donor antigens pre-transplant (p < 0.05). IL-2, IL-7, and IL-15 cytokine stimulation restored T cell proliferation, while p53 upregulation blocked proliferation. IPF subjects had shorter PBMC telomere lengths than non-IPF subjects (p < 0.001), and short PBMC telomere length was associated with impaired CD8+ T cell proliferation to alloantigens (p = 0.002). CONCLUSIONS IPF as an indication for lung transplant is associated with short PBMC telomere length and impaired T cell responses to donor antigens. However, the rescue of proliferation following cytokine exposure suggests that alloimmune anergy could be overcome. Telomere length may inform immunosuppression strategies for IPF recipients.
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Affiliation(s)
- Ping Wang
- Department of Medicine, University of California San Francisco, San Francisco, California
| | - Joey Leung
- Department of Surgery, University of California San Francisco, San Francisco, California
| | - Alice Lam
- Department of Surgery, University of California San Francisco, San Francisco, California
| | - Seoyeon Lee
- Department of Medicine, University of California San Francisco, San Francisco, California
| | - Daniel R Calabrese
- Department of Medicine, University of California San Francisco, San Francisco, California; Medical Service, San Francisco VA Health Care System, San Francisco, California
| | - Steven R Hays
- Department of Medicine, University of California San Francisco, San Francisco, California
| | - Jeffery A Golden
- Department of Medicine, University of California San Francisco, San Francisco, California
| | - Jasleen Kukreja
- Department of Surgery, University of California San Francisco, San Francisco, California
| | - Jonathan P Singer
- Department of Medicine, University of California San Francisco, San Francisco, California
| | - Paul J Wolters
- Department of Medicine, University of California San Francisco, San Francisco, California
| | - Qizhi Tang
- Department of Surgery, University of California San Francisco, San Francisco, California
| | - John R Greenland
- Department of Medicine, University of California San Francisco, San Francisco, California; Medical Service, San Francisco VA Health Care System, San Francisco, California.
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Pousa PA, Souza RM, Melo PHM, Correa BHM, Mendonça TSC, Simões-e-Silva AC, Miranda DM. Telomere Shortening and Psychiatric Disorders: A Systematic Review. Cells 2021; 10:1423. [PMID: 34200513 PMCID: PMC8227190 DOI: 10.3390/cells10061423] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 05/28/2021] [Accepted: 05/31/2021] [Indexed: 12/23/2022] Open
Abstract
Telomeres are aging biomarkers, as they shorten while cells undergo mitosis. The aim of this study was to evaluate whether psychiatric disorders marked by psychological distress lead to alterations to telomere length (TL), corroborating the hypothesis that mental disorders might have a deeper impact on our physiology and aging than it was previously thought. A systematic search of the literature using MeSH descriptors of psychological distress ("Traumatic Stress Disorder" or "Anxiety Disorder" or "depression") and telomere length ("cellular senescence", "oxidative stress" and "telomere") was conducted on PubMed, Cochrane Library and ScienceDirect databases. A total of 56 studies (113,699 patients) measured the TL from individuals diagnosed with anxiety, depression and posttraumatic disorders and compared them with those from healthy subjects. Overall, TL negatively associates with distress-related mental disorders. The possible underlying molecular mechanisms that underly psychiatric diseases to telomere shortening include oxidative stress, inflammation and mitochondrial dysfunction linking. It is still unclear whether psychological distress is either a cause or a consequence of telomere shortening.
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Affiliation(s)
- Pedro A. Pousa
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais 30130-100, Brazil; (P.A.P.); (R.M.S.); (P.H.M.M.); (B.H.M.C.); (T.S.C.M.); (A.C.S.-e.-S.)
| | - Raquel M. Souza
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais 30130-100, Brazil; (P.A.P.); (R.M.S.); (P.H.M.M.); (B.H.M.C.); (T.S.C.M.); (A.C.S.-e.-S.)
| | - Paulo Henrique M. Melo
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais 30130-100, Brazil; (P.A.P.); (R.M.S.); (P.H.M.M.); (B.H.M.C.); (T.S.C.M.); (A.C.S.-e.-S.)
| | - Bernardo H. M. Correa
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais 30130-100, Brazil; (P.A.P.); (R.M.S.); (P.H.M.M.); (B.H.M.C.); (T.S.C.M.); (A.C.S.-e.-S.)
| | - Tamires S. C. Mendonça
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais 30130-100, Brazil; (P.A.P.); (R.M.S.); (P.H.M.M.); (B.H.M.C.); (T.S.C.M.); (A.C.S.-e.-S.)
| | - Ana Cristina Simões-e-Silva
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais 30130-100, Brazil; (P.A.P.); (R.M.S.); (P.H.M.M.); (B.H.M.C.); (T.S.C.M.); (A.C.S.-e.-S.)
| | - Débora M. Miranda
- Department of Pediatrics, Laboratory of Molecular Medicine, UFMG, Belo Horizonte, Minas Gerais 30130-100, Brazil
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Bose S, Suescún AV, Song J, Castillo-González C, Aklilu BB, Branham E, Lynch R, Shippen DE. tRNA ADENOSINE DEAMINASE 3 is required for telomere maintenance in Arabidopsis thaliana. PLANT CELL REPORTS 2020; 39:1669-1685. [PMID: 32959123 PMCID: PMC7655638 DOI: 10.1007/s00299-020-02594-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/04/2020] [Indexed: 05/05/2023]
Abstract
KEY MESSAGE: tRNA Adenosine Deaminase 3 helps to sustain telomere tracts in a telomerase-independent fashion, likely through regulating cellular metabolism. Telomere length maintenance is influenced by a complex web of chromatin and metabolism-related factors. We previously reported that a lncRNA termed AtTER2 regulates telomerase activity in Arabidopsis thaliana in response to DNA damage. AtTER2 was initially shown to partially overlap with the 5' UTR of the tRNA ADENOSINE DEAMINASE 3 (TAD3) gene. However, updated genome annotation showed that AtTER2 was completely embedded in TAD3, raising the possibility that phenotypes ascribed to AtTER2 could be derived from TAD3. Here we show through strand-specific RNA-Seq, strand-specific qRT-PCR and bioinformatic analyses that AtTER2 does not encode a stable lncRNA. Further examination of the original tad3 (ter2-1/tad3-1) mutant revealed expression of an antisense transcript driven by a cryptic promoter in the T-DNA. Hence, a new hypomorphic allele of TAD3 (tad3-2) was examined. tad3-2 mutants showed hypersensitivity to DNA damage, but no deregulation of telomerase, suggesting that the telomerase phenotype of tad3-1 mutants reflects an off-target effect. Unexpectedly, however, tad3-2 plants displayed progressive loss of telomeric DNA over successive generations that was not accompanied by alteration of terminal architecture or end protection. The phenotype was exacerbated in plants lacking the telomerase processivity factor POT1a, indicating that TAD3 promotes telomere maintenance through a non-canonical, telomerase-independent pathway. The transcriptome of tad3-2 mutants revealed significant dysregulation of genes involved in auxin signaling and glucosinolate biosynthesis, pathways that intersect the stress response, cell cycle regulation and DNA metabolism. These findings indicate that the TAD3 locus indirectly contributes to telomere length homeostasis by altering the metabolic profile in Arabidopsis.
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Affiliation(s)
- Sreyashree Bose
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA
| | - Ana Victoria Suescún
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA
- Facultad de Ciencias, Instituto de Ciencias Ambientales Y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
| | - Jiarui Song
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA
| | | | - Behailu Birhanu Aklilu
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA
- KWS Gateway Research Center, LLC, 1005 N Warson Rd, BRDG Park, St. Louis, MO, 63132, USA
| | - Erica Branham
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA
| | - Ryan Lynch
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA
| | - Dorothy E Shippen
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA.
- Department of Biochemistry and Biophysics, 300 Olsen Blvd, Room 413, College Station, TX, 77843-2128, USA.
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The Role of Telomerase and Telomeres in Interstitial Lung Diseases: From Molecules to Clinical Implications. Int J Mol Sci 2019; 20:ijms20122996. [PMID: 31248154 PMCID: PMC6627617 DOI: 10.3390/ijms20122996] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/12/2019] [Accepted: 06/15/2019] [Indexed: 02/07/2023] Open
Abstract
Telomeres are distal chromosome regions associated with specific protein complexes that protect the chromosome against degradation and aberrations. Telomere maintenance capacity is an essential indication of healthy cell populations, and telomere damage is observed in processes such as malignant transformation, apoptosis, or cell senescence. At a cellular level, telomere damage may result from genotoxic stress, decreased activity of telomerase enzyme complex, dysfunction of shelterin proteins, or changes in expression of telomere-associated RNA such as TERRA. Clinical evidence suggests that mutation of telomerase genes (Tert/Terc) are associated with increased risk of congenital as well as age-related diseases (e.g., pneumonitis, idiopathic pulmonary fibrosis (IPF), dyskeratosis congenita, emphysema, nonspecific interstitial pneumonia, etc.). Thus, telomere length and maintenance can serve as an important prognostic factor as well as a potential target for new strategies of treatment for interstitial lung diseases (ILDs) and associated pulmonary pathologies.
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