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van der Linden J, Trap L, Scherer CV, Roks AJM, Danser AHJ, van der Pluijm I, Cheng C. Model Systems to Study the Mechanism of Vascular Aging. Int J Mol Sci 2023; 24:15379. [PMID: 37895059 PMCID: PMC10607365 DOI: 10.3390/ijms242015379] [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: 08/31/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Cardiovascular diseases are the leading cause of death globally. Within cardiovascular aging, arterial aging holds significant importance, as it involves structural and functional alterations in arteries that contribute substantially to the overall decline in cardiovascular health during the aging process. As arteries age, their ability to respond to stress and injury diminishes, while their luminal diameter increases. Moreover, they experience intimal and medial thickening, endothelial dysfunction, loss of vascular smooth muscle cells, cellular senescence, extracellular matrix remodeling, and deposition of collagen and calcium. This aging process also leads to overall arterial stiffening and cellular remodeling. The process of genomic instability plays a vital role in accelerating vascular aging. Progeria syndromes, rare genetic disorders causing premature aging, exemplify the impact of genomic instability. Throughout life, our DNA faces constant challenges from environmental radiation, chemicals, and endogenous metabolic products, leading to DNA damage and genome instability as we age. The accumulation of unrepaired damages over time manifests as an aging phenotype. To study vascular aging, various models are available, ranging from in vivo mouse studies to cell culture options, and there are also microfluidic in vitro model systems known as vessels-on-a-chip. Together, these models offer valuable insights into the aging process of blood vessels.
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Affiliation(s)
- Janette van der Linden
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus MC, 3015 GD Rotterdam, The Netherlands
- Department of Molecular Genetics, Cancer Genomics Center Netherlands, Erasmus MC, 3015 GD Rotterdam, The Netherlands
| | - Lianne Trap
- Department of Pulmonary Medicine, Erasmus MC, 3015 GD Rotterdam, The Netherlands
- Department of Internal Medicine, Erasmus MC, 3015 GD Rotterdam, The Netherlands
| | - Caroline V. Scherer
- Department of Molecular Genetics, Cancer Genomics Center Netherlands, Erasmus MC, 3015 GD Rotterdam, The Netherlands
| | - Anton J. M. Roks
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus MC, 3015 GD Rotterdam, The Netherlands
| | - A. H. Jan Danser
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus MC, 3015 GD Rotterdam, The Netherlands
| | - Ingrid van der Pluijm
- Department of Molecular Genetics, Cancer Genomics Center Netherlands, Erasmus MC, 3015 GD Rotterdam, The Netherlands
- Department of Vascular Surgery, Cardiovascular Institute, Erasmus MC, 3015 GD Rotterdam, The Netherlands
| | - Caroline Cheng
- Division of Experimental Cardiology, Department of Cardiology, Erasmus MC, 3015 GD Rotterdam, The Netherlands
- Department of Nephrology and Hypertension, Division of Internal Medicine and Dermatology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands
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2
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Bloom SI, Islam MT, Lesniewski LA, Donato AJ. Mechanisms and consequences of endothelial cell senescence. Nat Rev Cardiol 2023; 20:38-51. [PMID: 35853997 PMCID: PMC10026597 DOI: 10.1038/s41569-022-00739-0] [Citation(s) in RCA: 91] [Impact Index Per Article: 91.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/13/2022] [Indexed: 12/15/2022]
Abstract
Endothelial cells are located at the crucial interface between circulating blood and semi-solid tissues and have many important roles in maintaining systemic physiological function. The vascular endothelium is particularly susceptible to pathogenic stimuli that activate tumour suppressor pathways leading to cellular senescence. We now understand that senescent endothelial cells are highly active, secretory and pro-inflammatory, and have an aberrant morphological phenotype. Moreover, endothelial senescence has been identified as an important contributor to various cardiovascular and metabolic diseases. In this Review, we discuss the consequences of endothelial cell exposure to damaging stimuli (haemodynamic forces and circulating and endothelial-derived factors) and the cellular and molecular mechanisms that induce endothelial cell senescence. We also discuss how endothelial cell senescence causes arterial dysfunction and contributes to clinical cardiovascular diseases and metabolic disorders. Finally, we summarize the latest evidence on the effect of eliminating senescent endothelial cells (senolysis) and identify important remaining questions to be addressed in future studies.
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Affiliation(s)
- Samuel I Bloom
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
| | - Md Torikul Islam
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
| | - Lisa A Lesniewski
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT, USA
- Veterans Affairs Medical Center-Salt Lake City, Geriatric Research Education and Clinical Center, Salt Lake City, UT, USA
| | - Anthony J Donato
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA.
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT, USA.
- Veterans Affairs Medical Center-Salt Lake City, Geriatric Research Education and Clinical Center, Salt Lake City, UT, USA.
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA.
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3
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Zafirovic S, Macvanin M, Stanimirovic J, Obradovic M, Radovanovic J, Melih I, Isenovic E. Association Between Telomere Length and Cardiovascular Risk: Pharmacological Treatments Affecting Telomeres and Telomerase Activity. Curr Vasc Pharmacol 2022; 20:465-474. [PMID: 35986545 DOI: 10.2174/1570161120666220819164240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 06/03/2022] [Accepted: 06/06/2022] [Indexed: 01/25/2023]
Abstract
Telomeres represent the ends of chromosomes, and they are composed of an extensive number of - TTAGGG nucleotide sequence repeats in humans. Telomeres prevent chromosome degradation, participate in stabilization, and regulate the DNA repair system. Inflammation and oxidative stress have been identified as important processes causing cardiovascular disease and accelerating telomere shortening rate. This review investigates the link between telomere length and pathological vascular conditions from experimental and human studies. Also, we discuss pharmacological treatments affecting telomeres and telomerase activity.
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Affiliation(s)
- Sonja Zafirovic
- Department of Radiobiology and Molecular Genetics, VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Mirjana Macvanin
- Department of Radiobiology and Molecular Genetics, VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Julijana Stanimirovic
- Department of Radiobiology and Molecular Genetics, VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Milan Obradovic
- Department of Radiobiology and Molecular Genetics, VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Jelena Radovanovic
- Department of Radiobiology and Molecular Genetics, VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Irena Melih
- Faculty of Stomatology, Pancevo, University Business Academy, 21000 Novi Sad, Serbia
| | - Esma Isenovic
- Department of Radiobiology and Molecular Genetics, VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
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4
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Ait-Aissa K, Norwood-Toro LE, Terwoord J, Young M, Paniagua LA, Hader SN, Hughes WE, Hockenberry JC, Beare JE, Linn J, Kohmoto T, Kim J, Betts DH, LeBlanc AJ, Gutterman DD, Beyer AM. Noncanonical Role of Telomerase in Regulation of Microvascular Redox Environment With Implications for Coronary Artery Disease. FUNCTION (OXFORD, ENGLAND) 2022; 3:zqac043. [PMID: 36168588 PMCID: PMC9508843 DOI: 10.1093/function/zqac043] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/05/2022] [Accepted: 08/11/2022] [Indexed: 01/28/2023]
Abstract
Telomerase reverse transcriptase (TERT) (catalytic subunit of telomerase) is linked to the development of coronary artery disease (CAD); however, whether the role of nuclear vs. mitchondrial actions of TERT is involved is not determined. Dominant-negative TERT splice variants contribute to decreased mitochondrial integrity and promote elevated reactive oxygen species production. We hypothesize that a decrease in mitochondrial TERT would increase mtDNA damage, promoting a pro-oxidative redox environment. The goal of this study is to define whether mitochondrial TERT is sufficient to maintain nitric oxide as the underlying mechanism of flow-mediated dilation by preserving mtDNA integrity.Immunoblots and quantitative polymerase chain reaction were used to show elevated levels of splice variants α- and β-deletion TERT tissue from subjects with and without CAD. Genetic, pharmacological, and molecular tools were used to manipulate TERT localization. Isolated vessel preparations and fluorescence-based quantification of mtH2O2 and NO showed that reduction of TERT in the nucleus increased flow induced NO and decreased mtH2O2 levels, while prevention of mitochondrial import of TERT augmented pathological effects. Further elevated mtDNA damage was observed in tissue from subjects with CAD and initiation of mtDNA repair mechanisms was sufficient to restore NO-mediated dilation in vessels from patients with CAD. The work presented is the first evidence that catalytically active mitochondrial TERT, independent of its nuclear functions, plays a critical physiological role in preserving NO-mediated vasodilation and the balance of mitochondrial to nuclear TERT is fundamentally altered in states of human disease that are driven by increased expression of dominant negative splice variants.
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Affiliation(s)
- K Ait-Aissa
- Department of Internal Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - L E Norwood-Toro
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - J Terwoord
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - M Young
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - L A Paniagua
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA,Cardiovascular Innovation Institute, University of Louisville, Louisville, KY 40292, USA
| | - S N Hader
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - W E Hughes
- Department of Internal Medicine, University of Iowa, Iowa City, IA 52242, USA,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - J C Hockenberry
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - J E Beare
- Cardiovascular Innovation Institute, University of Louisville, Louisville, KY 40292, USA,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY 40292, USA
| | - J Linn
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - T Kohmoto
- Department of Surgery, Division of Cardiothoracic Surgery, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - J Kim
- Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, ON N6A 5C1, Canada
| | - D H Betts
- Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, ON N6A 5C1, Canada
| | - A J LeBlanc
- Cardiovascular Innovation Institute, University of Louisville, Louisville, KY 40292, USA,Department of Cardiovascular and Thoracic Surgery, School of Medicine, University of Louisville, Louisville, KY 40292, USA
| | - D D Gutterman
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - A M Beyer
- Address correspondence to A.M.B. (e-mail: )
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5
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Chen S, Chen L, Qi Y, Xu J, Ge Q, Fan Y, Chen D, Zhang Y, Wang L, Hou T, Yang X, Xi Y, Si J, Kang L, Wang L. Bifidobacterium adolescentis regulates catalase activity and host metabolism and improves healthspan and lifespan in multiple species. NATURE AGING 2021; 1:991-1001. [PMID: 37118342 DOI: 10.1038/s43587-021-00129-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 09/27/2021] [Indexed: 04/30/2023]
Abstract
To identify candidate bacteria associated with aging, we performed fecal microbiota sequencing in young, middle-aged and older adults, and found lower Bifidobacterium adolescentis abundance in older individuals aged ≥60 years. Dietary supplementation of B. adolescentis improved osteoporosis and neurodegeneration in a mouse model of premature aging (Terc-/-) and increased healthspan and lifespan in Drosophila melanogaster and Caenorhabditis elegans. B. adolescentis supplementation increased the activity of the catalase (CAT) enzyme in skeletal muscle and brain tissue from Terc-/- mice, and suppressed cellular senescence in mouse embryonic fibroblasts. Transgenic deletion of catalase (ctl-2) in C. elegans abolished the effects of B. adolescentis on the lifespan and healthspan. B. adolescentis feeding also led to changes in oxidative stress-associated metabolites in Terc-/- mouse feces. These results suggest a role for B. adolescentis in improving the healthspan and lifespan through the regulation of CAT activity and host metabolism.
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Affiliation(s)
- Shujie Chen
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Zhejiang, China
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Zhejiang, China
| | - Luyi Chen
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Zhejiang, China
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Zhejiang, China
| | - Yadong Qi
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Zhejiang, China
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Zhejiang, China
| | - Jilei Xu
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Zhejiang, China
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Zhejiang, China
| | - Qiwei Ge
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Zhejiang, China
- Department of Gastroenterology, Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, China
| | - Yuedan Fan
- Department of Neurobiology and Department of Neurosurgery of the First Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Zhejiang, China
| | - Du Chen
- Department of Neurobiology and Department of Neurosurgery of the First Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Zhejiang, China
| | - Yawen Zhang
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Zhejiang, China
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Zhejiang, China
| | - Lan Wang
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Zhejiang, China
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Zhejiang, China
| | - Tongyao Hou
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Zhejiang, China
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Zhejiang, China
| | - Xiaohang Yang
- Institute of Genetics and Department of Genetics, Division of Human Reproduction and Developmental Genetics of the Women's Hospital, Zhejiang University, Zhejiang, China
| | - Yongmei Xi
- Institute of Genetics and Department of Genetics, Division of Human Reproduction and Developmental Genetics of the Women's Hospital, Zhejiang University, Zhejiang, China
| | - Jianmin Si
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Zhejiang, China.
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Zhejiang, China.
| | - Lijun Kang
- Department of Neurobiology and Department of Neurosurgery of the First Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, China.
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Zhejiang, China.
| | - Liangjing Wang
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Zhejiang, China.
- Department of Gastroenterology, Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, China.
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6
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Lekva T, Roland MCP, Estensen ME, Norwitz ER, Tilburgs T, Henriksen T, Bollerslev J, Normann KR, Magnus P, Olstad OK, Aukrust P, Ueland T. Dysregulated non-coding telomerase RNA component and associated exonuclease XRN1 in leucocytes from women developing preeclampsia-possible link to enhanced senescence. Sci Rep 2021; 11:19735. [PMID: 34611223 PMCID: PMC8492805 DOI: 10.1038/s41598-021-99140-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 09/21/2021] [Indexed: 02/08/2023] Open
Abstract
Senescence in placenta/fetal membranes is a normal phenomenon linked to term parturition. However, excessive senescence which may be induced by telomere attrition, has been associated with preeclampsia (PE). We hypothesized that the telomerase complex in peripheral blood mononuclear cells (PBMC) and circulating telomere associated senescence markers would be dysregulated in women with PE. We measured long non-coding (nc) RNA telomerase RNA component (TERC) and RNAs involved in the maturation of TERC in PBMC, and the expression of TERC and 5′–3′ Exoribonuclease 1 (XRN1) in extracellular vesicles at 22–24 weeks, 36–38 weeks and, 5-year follow-up in controls and PE. We also measured telomere length at 22–24 weeks and 5-year follow-up. The circulating senescence markers cathelicidin antimicrobial peptide (CAMP), β-galactosidase, stathmin 1 (STMN1) and chitotriosidase/CHIT1 were measured at 14–16, 22–24, 36–38 weeks and at 5-year follow-up in the STORK study and before delivery and 6 months post-partum in the ACUTE PE study. We found decreased expression of TERC in PBMC early in pregnant women who subsequently developed PE. XRN1 involved in the maturation of TERC was also reduced in pregnancy and 5-year follow-up. Further, we found that the senescence markers CAMP and β-galactosidase were increased in PE pregnancies, and CAMP remained higher at 5-year follow-up. β-galactosidase was associated with atherogenic lipid ratios during pregnancy and at 5-year follow-up, in PE particularly. This study suggests a potential involvement of dysfunctional telomerase biology in the pathophysiology of PE, which is not restricted to the placenta.
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Affiliation(s)
- Tove Lekva
- Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway.
| | - Marie Cecilie Paasche Roland
- Department of Obstetrics, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,National Research Center for Women's Health, Oslo University Hospital, Oslo, Norway
| | - Mette E Estensen
- Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | | | - Tamara Tilburgs
- Division of Immunobiology, Center of Inflammation and Tolerance, Cincinnati, OH, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Tore Henriksen
- Department of Obstetrics, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Jens Bollerslev
- Faculty of Medicine, University of Oslo, Oslo, Norway.,Section of Specialized Endocrinology, Department of Endocrinology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Kjersti R Normann
- Faculty of Medicine, University of Oslo, Oslo, Norway.,Section of Specialized Endocrinology, Department of Endocrinology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Per Magnus
- Centre for Fertility and Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Ole Kristoffer Olstad
- The Blood Cell Research Group, Department of Medical Biochemistry, Oslo University Hospital, Ullevål, Oslo, Norway
| | - Pål Aukrust
- Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway.,Section of Clinical Immunology and Infectious Diseases, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,K.G. Jebsen Inflammatory Research Center, University of Oslo, Oslo, Norway.,K. G. Jebsen Thrombosis Research and Expertise Center, University of Tromsø, Tromsø, Norway
| | - Thor Ueland
- Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway.,K.G. Jebsen Inflammatory Research Center, University of Oslo, Oslo, Norway.,K. G. Jebsen Thrombosis Research and Expertise Center, University of Tromsø, Tromsø, Norway
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7
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Loh NY, Noordam R, Christodoulides C. Telomere length and metabolic syndrome traits: A Mendelian randomisation study. Aging Cell 2021; 20:e13445. [PMID: 34312982 PMCID: PMC8373272 DOI: 10.1111/acel.13445] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 07/05/2021] [Accepted: 07/09/2021] [Indexed: 12/13/2022] Open
Abstract
Observational studies have revealed associations between short leucocyte telomere length (LTL), a TL marker in somatic tissues and multiple Metabolic Syndrome (MetS) traits. Animal studies have supported these findings by showing that increased telomere attrition leads to adipose tissue dysfunction and insulin resistance. We investigated the associations between genetically instrumented LTL and MetS traits using Mendelian Randomisation (MR). Fifty-two independent variants identified at FDR<0.05 from a genome-wide association study (GWAS) including 78,592 Europeans and collectively accounting for 2.93% of LTL variance were selected as genetic instruments for LTL. Summary-level data for MetS traits and for the MetS as a binary phenotype were obtained from the largest publicly available GWAS and two-sample MR analyses were used to estimate the associations of LTL with these traits. The combined effect of the genetic instruments was modelled using inverse variance weighted regression and sensitivity analyses with MR-Egger, weighted-median and MR-PRESSO were performed to test for and correct horizonal pleiotropy. Genetically instrumented longer LTL was associated with higher waist-to-hip ratio adjusted for body mass index (β = 0.045 SD, SE = 0.018, p = 0.01), raised systolic (β = 1.529 mmHg, SE = 0.332, p = 4x10-6 ) and diastolic (β = 0.633 mmHg, SE = 0.222, p = 0.004) blood pressure, and increased MetS risk (OR = 1.133, 95% CI 1.057-1.215). Consistent results were obtained in sensitivity analyses, which provided no evidence of unbalanced horizontal pleiotropy. Telomere shortening might not be a major driver of cellular senescence and dysfunction in human adipose tissue. Future experimental studies should examine the mechanistic bases for the links between longer LTL and increased upper-body fat distribution and raised blood pressure.
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Affiliation(s)
- Nellie Y. Loh
- Oxford Centre for Diabetes, Endocrinology and Metabolism Radcliffe Department of Medicine University of Oxford Oxford UK
| | - Raymond Noordam
- Department of Internal Medicine Section of Gerontology and Geriatrics Leiden University Medical Center Leiden The Netherlands
| | - Constantinos Christodoulides
- Oxford Centre for Diabetes, Endocrinology and Metabolism Radcliffe Department of Medicine University of Oxford Oxford UK
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8
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Hoffmann J, Richardson G, Haendeler J, Altschmied J, Andrés V, Spyridopoulos I. Telomerase as a Therapeutic Target in Cardiovascular Disease. Arterioscler Thromb Vasc Biol 2021; 41:1047-1061. [PMID: 33504179 DOI: 10.1161/atvbaha.120.315695] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Shortened telomeres have been linked to numerous chronic diseases, most importantly coronary artery disease, but the underlying mechanisms remain ill defined. Loss-of-function mutations and deletions in telomerase both accelerate telomere shortening but do not necessarily lead to a clinical phenotype associated with atherosclerosis, questioning the causal role of telomere length in cardiac pathology. The differential extranuclear functions of the 2 main components of telomerase, telomerase reverse transcriptase and telomerase RNA component, offer important clues about the complex relationship between telomere length and cardiovascular pathology. In this review, we critically discuss relevant preclinical models, genetic disorders, and clinical studies to elucidate the impact of telomerase in cardiovascular disease and its potential role as a therapeutic target. We suggest that the antioxidative function of mitochondrial telomerase reverse transcriptase might be atheroprotective, making it a potential target for clinical trials. Graphic Abstract: A graphic abstract is available for this article.
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Affiliation(s)
- Jedrzej Hoffmann
- Department of Medicine, Cardiology, Goethe University Hospital, Frankfurt, Germany (J.H.)
| | - Gavin Richardson
- Institute of Biosciences, Newcastle University, United Kingdom (G.R.)
| | - Judith Haendeler
- Institute of Clinical Chemistry and Laboratory Diagnostic, Medical Faculty and University Hospital Duesseldorf and Heinrich-Heine-University Duesseldorf, Germany (J.H., J.A.)
| | - Joachim Altschmied
- Institute of Clinical Chemistry and Laboratory Diagnostic, Medical Faculty and University Hospital Duesseldorf and Heinrich-Heine-University Duesseldorf, Germany (J.H., J.A.).,IUF - Leibniz Research Institute for Environmental Medicine (J.A.)
| | - Vicente Andrés
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain (V.A.).,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Spain (V.A.)
| | - Ioakim Spyridopoulos
- Translational and Clinical Research Institute, Newcastle University, United Kingdom (I.S.).,Freeman Hospital, Cardiothoracic Centre, Newcastle Upon Tyne Hospital Trust, United Kingdom (I.S.)
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9
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Relative Telomere Length in Peripheral Blood Cells and Hypertension Risk among Mine Workers: A Case-Control Study in Chinese Coal Miners. BIOMED RESEARCH INTERNATIONAL 2020; 2020:5681096. [PMID: 33354567 PMCID: PMC7735841 DOI: 10.1155/2020/5681096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/18/2020] [Accepted: 11/25/2020] [Indexed: 02/07/2023]
Abstract
Hypertension is a common chronic disease in middle-aged and elderly people and is an important risk factor for many cardiovascular diseases. Its pathogenesis remains unclear. Epidemiological studies have found that the loss of telomere length in peripheral blood cells can increase the risk of coronary heart disease, myocardial infarction, and other diseases. However, a correlation between loss of telomere length and hypertension has not been established. In this study, we aimed to explore the association between telomere length and the risk of essential hypertension (EH) in Chinese coal miners. A case-control study was performed with 215 EH patients and 222 healthy controls in a large coal mining group located in North China. Face-to-face interviews were conducted by trained staff with the necessary medical knowledge. Relative telomere length (RTL) was measured by a quantitative real-time PCR assay using DNA extracted from peripheral blood. In the control group, the age-adjusted RTL was statistically significantly lower in miners performing hard physical labour compared with nonphysical labour (P = 0.043). A significantly shorter age-adjusted RTL was found in the control group of participants who consumed alcohol regularly compared with those who do not consume alcohol (P = 0.024). Age-adjusted RTL was negatively correlated with body mass index (BMI) and alcohol consumption. Hypertension was also found to be significantly correlated with factors such as age, BMI, alcohol consumption, smoking, and tea consumption. Our results suggest that RTL is associated with hypertension in coal miners.
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10
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Dominic A, Banerjee P, Hamilton DJ, Le NT, Abe JI. Time-dependent replicative senescence vs. disturbed flow-induced pre-mature aging in atherosclerosis. Redox Biol 2020; 37:101614. [PMID: 32863187 PMCID: PMC7767754 DOI: 10.1016/j.redox.2020.101614] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/07/2020] [Accepted: 06/18/2020] [Indexed: 12/19/2022] Open
Abstract
Accumulation of senescent cells has a causative role in the pathology of age-related disorders including atherosclerosis (AS) and cardiovascular diseases (CVDs). However, the concept of senescence is now drastically changing, and the new concept of senescence-associated reprogramming/stemness has emerged, suggesting that senescence is not merely related to “cell cycle arrest” or halting various cellular functions. It is well known that disturbed flow (D-flow) accelerates pre-mature aging and plays a significant role in the development of AS. We will discuss in this review that pre-mature aging induced by D-flow is not comparable to time-dependent aging, particularly with a focus on the possible involvement of senescence-associated secretory phenotype (SASP) in senescence-associated reprogramming/stemness, or increasing cell numbers. We will also present our outlook of nicotinamide adenine dinucleotides (NAD)+ deficiency-induced mitochondrial reactive oxygen species (mtROS) in evoking SASP by activating DNA damage response (DDR). MtROS plays a key role in developing cross-talk between nuclear-mitochondria, SASP, and ultimately atherosclerosis formation. Although senescence induced by time and various stress factors is a classical concept, we wish that the readers will see the undergoing Copernican-like change in this concept, as well as to recognize the significant contrast between pre-mature aging induced by D-flow and time-dependent aging.
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Affiliation(s)
- Abishai Dominic
- Department of Molecular and Cellular Biology Texas A&M Health Science Center, USA; Department of Cardio-Vascular Regeneration, Houston Methodist Research Institute, Texas, USA
| | - Priyanka Banerjee
- Department of Cardio-Vascular Regeneration, Houston Methodist Research Institute, Texas, USA
| | - Dale J Hamilton
- Department of Medicine, Center for Bioenergetics Houston Methodist Research Institute, Texas, USA
| | - Nhat-Tu Le
- Department of Cardio-Vascular Regeneration, Houston Methodist Research Institute, Texas, USA.
| | - Jun-Ichi Abe
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
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11
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Alcalde-Estévez E, Asenjo-Bueno A, Sosa P, Olmos G, Plaza P, Caballero-Mora MÁ, Rodríguez-Puyol D, Ruíz-Torres MP, López-Ongil S. Endothelin-1 induces cellular senescence and fibrosis in cultured myoblasts. A potential mechanism of aging-related sarcopenia. Aging (Albany NY) 2020; 12:11200-11223. [PMID: 32572011 PMCID: PMC7343454 DOI: 10.18632/aging.103450] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 05/20/2020] [Indexed: 02/06/2023]
Abstract
Endothelial dysfunction, with increased endothelin-1 (ET-1) synthesis, and sarcopenia, characterized by the loss of muscular mass and strength, are two aging–related conditions. However, a relationship between them has not been already established. The aim of this study was to determine whether ET-1 induces senescence and fibrosis in cultured murine myoblasts, which could be involved in the development of sarcopenia related to aging. For this purpose, myoblasts were incubated with ET-1 to assess cellular senescence, analyzed by senescence associated β-galactosidase activity and p16 expression; and fibrosis, assessed by fibronectin expression. ET-1 induced myoblast senescence and fibrosis through ETA receptor. The use of antioxidants and several antagonists revealed that ET-1 effect on senescence and fibrosis depended on ROS production and activation of PI3K-AKT-GSK pathway. To stress the in vivo relevance of these results, circulating ET-1, muscular strength, muscular fibrosis and p16 expression were measured in male C57Bl6 mice from 5-18-24-months-old. Old mice shown high levels of ET-1 correlated with muscular fibrosis, muscular p16 expression and loss of muscle strength. In conclusion, ET-1 promotes fibrosis and senescence in cultured myoblasts, similar results were found in old mice, suggesting a potential role for ET-1 in the development of sarcopenia related to aging.
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Affiliation(s)
- Elena Alcalde-Estévez
- Departamento Biología de Sistemas, Universidad de Alcalá, Alcalá de Henares, Madrid 28871, Spain
| | - Ana Asenjo-Bueno
- Unidad de Investigación de la Fundación para la Investigación Biomédica del Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid 28805, Spain
| | - Patricia Sosa
- Departamento Biología de Sistemas, Universidad de Alcalá, Alcalá de Henares, Madrid 28871, Spain
| | - Gemma Olmos
- Departamento Biología de Sistemas, Universidad de Alcalá, Alcalá de Henares, Madrid 28871, Spain.,Instituto Reina Sofía de Investigación Nefrológica (IRSIN) de la Fundación Renal Iñigo Álvarez de Toledo (FRIAT), Madrid 28003, Spain.,Area 3-Fisiología y Fisiopatología Renal y Vascular del IRYCIS, Madrid 28046, Spain
| | - Patricia Plaza
- Unidad de Investigación de la Fundación para la Investigación Biomédica del Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid 28805, Spain
| | | | - Diego Rodríguez-Puyol
- Instituto Reina Sofía de Investigación Nefrológica (IRSIN) de la Fundación Renal Iñigo Álvarez de Toledo (FRIAT), Madrid 28003, Spain.,Area 3-Fisiología y Fisiopatología Renal y Vascular del IRYCIS, Madrid 28046, Spain.,Servicio de Nefrología del Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid 28805, Spain
| | - María Piedad Ruíz-Torres
- Departamento Biología de Sistemas, Universidad de Alcalá, Alcalá de Henares, Madrid 28871, Spain.,Instituto Reina Sofía de Investigación Nefrológica (IRSIN) de la Fundación Renal Iñigo Álvarez de Toledo (FRIAT), Madrid 28003, Spain.,Area 3-Fisiología y Fisiopatología Renal y Vascular del IRYCIS, Madrid 28046, Spain
| | - Susana López-Ongil
- Unidad de Investigación de la Fundación para la Investigación Biomédica del Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid 28805, Spain.,Instituto Reina Sofía de Investigación Nefrológica (IRSIN) de la Fundación Renal Iñigo Álvarez de Toledo (FRIAT), Madrid 28003, Spain.,Area 3-Fisiología y Fisiopatología Renal y Vascular del IRYCIS, Madrid 28046, Spain
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12
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Cheng G, Wang L, Dai M, Wei F, Xu D. Shorter Leukocyte Telomere Length coupled with lower expression of Telomerase Genes in patients with Essential Hypertension. Int J Med Sci 2020; 17:2180-2186. [PMID: 32922179 PMCID: PMC7484671 DOI: 10.7150/ijms.48456] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 07/27/2020] [Indexed: 12/29/2022] Open
Abstract
Background: The essential hypertension (EH) pathophysiology remains poorly understood. Many studies indicate that reduced leukocyte telomere length (LTL) is involved in the EH pathogenesis, however, the direct analysis of arterial telomere length (ATL) from EH patients and normotensive individuals did not show a difference. To address these discrepant observations between LTL and ATL, we performed comprehensive analyses of LTL, telomerase gene expression and their genetic variants in healthy normotensive controls and EH patients. Methods: Sex-matched 206 EH patients and equal numbers of healthy controls were recruited. LTL, and the expression of two key telomerase components, telomerase reverse transcriptase (TERT) and internal RNA template (TERC) were determined using qPCR. Genetic variants of rs2736100 at the TERT and rs12696304 at the TERC loci were determined using TaqMan genotyping kits. Results: LTL was significantly shorter in EH patients than in their normotensive controls (0.96 ± 0.52 vs 1.19 ± 0.58, P = 0.001). Moreover, TERT and TERC expression in patients' leukocytes were substantially lower compare to that in healthy controls (TERT, 0.98 ± 0.98 vs 1.76 ± 1.75, P = 0.003; TERC, 1.26 ± 1.62 vs 4.69 ± 3.61, P < 0.001). However, there were no differences in the genetic variants of rs2736100 and rs12696304 between patient and control groups. Conclusions: EH patients have significantly shorter LTL, which may result from defective TERT and TERC expression in leukocytes. Collectively, lower telomerase expression contributes to shorter LTL observed in EH patients, and telomerase activators may be considered for EH therapy.
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Affiliation(s)
- Guanghui Cheng
- Central Research Laboratory, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, PR China
| | - Lina Wang
- Central Research Laboratory, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, PR China
| | - Mingkai Dai
- Central Research Laboratory, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, PR China
| | - Fengtao Wei
- Department of Cardiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, PR China
| | - Dawei Xu
- Department of Medicine, Division of Hematology, Bioclinicum and Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital Solna, SE-171 76 Solna, Sweden
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13
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Folgueras AR, Freitas-Rodríguez S, Velasco G, López-Otín C. Mouse Models to Disentangle the Hallmarks of Human Aging. Circ Res 2019; 123:905-924. [PMID: 30355076 DOI: 10.1161/circresaha.118.312204] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Model organisms have provided fundamental evidence that aging can be delayed and longevity extended. These findings gave rise to a new era in aging research aimed at elucidating the pathways and networks controlling this complex biological process. The identification of 9 hallmarks of aging has established a framework to evaluate the relative contribution of each hallmark and the interconnections among them. In this review, we revisit these hallmarks with the information obtained exclusively through the generation of genetically modified mouse models that have a significant impact on the aging process. We discuss within each hallmark those interventions that accelerate aging or that have been successful at increasing lifespan, with the final goal of identifying the most promising antiaging avenues based on the current knowledge provided by in vivo models.
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Affiliation(s)
- Alicia R Folgueras
- From the Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, Spain
| | - Sandra Freitas-Rodríguez
- From the Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, Spain
| | - Gloria Velasco
- From the Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, Spain
| | - Carlos López-Otín
- From the Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, Spain
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14
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Abstract
Cardiac ageing manifests as a decline in function leading to heart failure. At the cellular level, ageing entails decreased replicative capacity and dysregulation of cellular processes in myocardial and nonmyocyte cells. Various extrinsic parameters, such as lifestyle and environment, integrate important signalling pathways, such as those involving inflammation and oxidative stress, with intrinsic molecular mechanisms underlying resistance versus progression to cellular senescence. Mitigation of cardiac functional decline in an ageing organism requires the activation of enhanced maintenance and reparative capacity, thereby overcoming inherent endogenous limitations to retaining a youthful phenotype. Deciphering the molecular mechanisms underlying dysregulation of cellular function and renewal reveals potential interventional targets to attenuate degenerative processes at the cellular and systemic levels to improve quality of life for our ageing population. In this Review, we discuss the roles of extrinsic and intrinsic factors in cardiac ageing. Animal models of cardiac ageing are summarized, followed by an overview of the current and possible future treatments to mitigate the deleterious effects of cardiac ageing.
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15
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Affiliation(s)
- Andreas M Beyer
- From the Department of Medicine (A.M.B., L.E.N.T.) .,Cardiovascular Center (A.M.B., L.E.N.T.).,Department of Physiology (A.M.B.).,Redox Biology Program (A.M.B.), Medical College of Wisconsin, Milwaukee
| | - Laura E Norwood Toro
- From the Department of Medicine (A.M.B., L.E.N.T.).,Cardiovascular Center (A.M.B., L.E.N.T.)
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16
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TSC1 deletion in fibroblasts alleviates lipopolysaccharide-induced acute kidney injury. Clin Sci (Lond) 2018; 132:2087-2101. [PMID: 30185506 DOI: 10.1042/cs20180348] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 08/20/2018] [Accepted: 09/05/2018] [Indexed: 11/17/2022]
Abstract
Mechanistic target of rapamycin complex 1 (mTORC1) signaling is active in inflammation, but its involvement in septic acute kidney injury (AKI) has not been shown. mTORC1 activation (p-S6) in renal fibroblasts was increased in a mouse AKI model induced by 1.5 mg/kg lipopolysaccharide (LPS). Deletion of tuberous sclerosis complex 1 (TSC1), an mTORC1 negative regulator, in fibroblasts (Fibro-TSC1-/-) inhibited the elevation of serum creatinine and blood urea nitrogen in AKI compared with that in TSC1fl/fl control mice. Endothelin-1 (EDN1) and phospho-Jun-amino-terminal kinase (p-JNK) were up-regulated in Fibro-TSC1-/- renal fibroblasts after LPS challenge. Rapamycin, an mTORC1 inhibitor, and bosentan, an EDN1 antagonist, eliminated the difference in renal function between TSC1fl/fl and Fibro-TSC1-/- mice after LPS injection. Rapamycin restored LPS-induced up-regulation of EDN1, endothelin converting enzyme-1 (ECE1), and p-JNK in TSC1-knockdown mouse embryonic fibroblasts (MEFs). SP600125, a Jun-amino-terminal kinase (JNK) inhibitor, attenuated LPS-induced enhancement of EDN1 and ECE1 in TSC1-knockdown MEFs without a change in phospho-S6 ribosomal protein (p-S6) level. The results indicate that mTORC1-JNK-dependent up-regulation of ECE1 elevated EDN1 in TSC1-knockout renal fibroblasts and contributed to improvement of renal function in Fibro-TSC1-/- mice with LPS-induced AKI. Renal fibroblast mTORC1 plays an important role in septic AKI.
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17
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Telomere Biology and Thoracic Aortic Aneurysm. Int J Mol Sci 2017; 19:ijms19010003. [PMID: 29267201 PMCID: PMC5795955 DOI: 10.3390/ijms19010003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 12/13/2017] [Accepted: 12/19/2017] [Indexed: 12/27/2022] Open
Abstract
Ascending aortic aneurysms are mostly asymptomatic and present a great risk of aortic dissection or perforation. Consequently, ascending aortic aneurysms are a source of lethality with increased age. Biological aging results in progressive attrition of telomeres, which are the repetitive DNA sequences at the end of chromosomes. These telomeres play an important role in protection of genomic DNA from end-to-end fusions. Telomere maintenance and telomere attrition-associated senescence of endothelial and smooth muscle cells have been indicated to be part of the pathogenesis of degenerative vascular diseases. This systematic review provides an overview of telomeres, telomere-associated proteins and telomerase to the formation and progression of aneurysms of the thoracic ascending aorta. A better understanding of telomere regulation in the vascular pathology might provide new therapeutic approaches. Measurements of telomere length and telomerase activity could be potential prognostic biomarkers for increased risk of death in elderly patients suffering from an aortic aneurysm.
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18
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Olmos G, Martínez‐Miguel P, Alcalde‐Estevez E, Medrano D, Sosa P, Rodríguez‐Mañas L, Naves‐Diaz M, Rodríguez‐Puyol D, Ruiz‐Torres MP, López‐Ongil S. Hyperphosphatemia induces senescence in human endothelial cells by increasing endothelin-1 production. Aging Cell 2017; 16:1300-1312. [PMID: 28857396 PMCID: PMC5676064 DOI: 10.1111/acel.12664] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/01/2017] [Indexed: 12/12/2022] Open
Abstract
Hyperphosphatemia is related to some pathologies, affecting vascular cell behavior. This work analyzes whether high concentration of extracellular phosphate induces endothelial senescence through up‐regulation of endothelin‐1 (ET‐1), exploring the mechanisms involved. The phosphate donor β‐glycerophosphate (BGP) in human endothelial cells increased ET‐1 production, endothelin‐converting enzyme‐1 (ECE‐1) protein, and mRNA expression, which depend on the AP‐1 activation through ROS production. In parallel, BGP also induced endothelial senescence by increasing p16 expression and the senescence‐associated β‐galactosidase (SA‐ß‐GAL) activity. ET‐1 itself was able to induce endothelial senescence, increasing p16 expression and SA‐ß‐GAL activity. In addition, senescence induced by BGP was blocked when different ET‐1 system antagonists were used. BGP increased ROS production at short times, and the presence of antioxidants prevented the effect of BGP on AP1 activation, ECE‐1 expression, and endothelial senescence. These findings were confirmed in vivo with two animal models in which phosphate serum levels were increased: seven/eight nephrectomized rats as chronic kidney disease models fed on a high phosphate diet and aged mice. Both models showed hyperphosphatemia, higher levels of ET‐1, and up‐regulation in aortic ECE‐1, suggesting a direct relationship between hyperphosphatemia and ET‐1. Present results point to a new and relevant role of hyperphosphatemia on the regulation of ET‐1 system and senescence induction at endothelial level, both in endothelial cells and aorta from two animal models. The mechanism involved showed a higher ROS production, which probably activates AP‐1 transcription factor and, as a result, ECE‐1 expression, increasing ET‐1 synthesis, which in consequence induces endothelial senescence.
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Affiliation(s)
- Gemma Olmos
- System Biology Department Alcala University Alcalá de Henares Madrid Spain
- Instituto Reina Sofía de Investigación Nefrológica IRSIN Madrid Spain
| | - Patricia Martínez‐Miguel
- Research Unit Biomedical Research Foundation from Príncipe de Asturias University Hospital Alcalá de Henares Madrid Spain
- Nephrology Section Biomedical Research Foundation from Príncipe de Asturias University Hospital Alcalá de Henares Madrid Spain
| | - Elena Alcalde‐Estevez
- Research Unit Biomedical Research Foundation from Príncipe de Asturias University Hospital Alcalá de Henares Madrid Spain
| | - Diana Medrano
- Research Unit Biomedical Research Foundation from Príncipe de Asturias University Hospital Alcalá de Henares Madrid Spain
| | - Patricia Sosa
- System Biology Department Alcala University Alcalá de Henares Madrid Spain
| | | | - Manuel Naves‐Diaz
- Instituto Reina Sofía de Investigación Nefrológica IRSIN Madrid Spain
- Bone and Mineral Research Unit Asturias Central University Hospital Oviedo Spain
| | - Diego Rodríguez‐Puyol
- Instituto Reina Sofía de Investigación Nefrológica IRSIN Madrid Spain
- Research Unit Biomedical Research Foundation from Príncipe de Asturias University Hospital Alcalá de Henares Madrid Spain
- Nephrology Section Biomedical Research Foundation from Príncipe de Asturias University Hospital Alcalá de Henares Madrid Spain
| | - María Piedad Ruiz‐Torres
- System Biology Department Alcala University Alcalá de Henares Madrid Spain
- Instituto Reina Sofía de Investigación Nefrológica IRSIN Madrid Spain
| | - Susana López‐Ongil
- Instituto Reina Sofía de Investigación Nefrológica IRSIN Madrid Spain
- Research Unit Biomedical Research Foundation from Príncipe de Asturias University Hospital Alcalá de Henares Madrid Spain
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19
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Ambasta RK, Kohli H, Kumar P. Multiple therapeutic effect of endothelial progenitor cell regulated by drugs in diabetes and diabetes related disorder. J Transl Med 2017; 15:185. [PMID: 28859673 PMCID: PMC5580204 DOI: 10.1186/s12967-017-1280-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 08/12/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Reduced levels of endothelial progenitor cells (EPCs) counts have been reported in diabetic mellitus (DM) patients and other diabetes-related disorder. EPCs are a circulating, bone marrow-derived cell population that appears to participate in vasculogenesis, angiogenesis and damage repair. These EPC may revert the damage caused in diabetic condition. We aim to identify several existing drugs and signaling molecule, which could alleviate or improve the diabetes condition via mobilizing and increasing EPC number as well as function. MAIN BODY Accumulated evidence suggests that dysregulation of EPC phenotype and function may be attributed to several signaling molecules and cytokines in DM patients. Hyperglycemia alone, through the overproduction of reactive oxygen species (ROS) via eNOS and NOX, can induce changes in gene expression and cellular behavior in diabetes. Furthermore, reports suggest that EPC telomere shortening via increased oxidative DNA damage may play an important role in the pathogenesis of coronary artery disease in diabetic patients. In this review, different type of EPC derived from different sources has been discussed along with cell-surface marker. The reduced number and immobilized EPC in diabetic condition have been mobilized for the therapeutic purpose via use of existing, and novel drugs have been discussed. Hence, evidence list of all types of drugs that have been reported to target the same pathway which affect EPC number and function in diabetes has been reviewed. Additionally, we highlight that proteins are critical in diabetes via polymorphism and inhibitor studies. Ultimately, a lucid pictorial explanation of diabetic and normal patient signaling pathways of the collected data have been presented in order to understand the complex signaling mystery underlying in the diseased and normal condition. CONCLUSION Finally, we conclude on eNOS-metformin-HSp90 signaling and its remedial effect for controlling the EPC to improve the diabetic condition for delaying diabetes-related complication. Altogether, the review gives a holistic overview about the elaborate therapeutic effect of EPC regulated by novel and existing drugs in diabetes and diabetes-related disorder.
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Affiliation(s)
- Rashmi K. Ambasta
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, DTU, Delhi, India
| | - Harleen Kohli
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, DTU, Delhi, India
| | - Pravir Kumar
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, DTU, Delhi, India
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20
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Cao T, Rajasingh S, Samanta S, Dawn B, Bittel DC, Rajasingh J. Biology and clinical relevance of noncoding sno/scaRNAs. Trends Cardiovasc Med 2017; 28:81-90. [PMID: 28869095 DOI: 10.1016/j.tcm.2017.08.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 07/18/2017] [Accepted: 08/04/2017] [Indexed: 12/15/2022]
Abstract
Small nucleolar RNAs (snoRNAs) are a group of noncoding RNAs that perform various biological functions, including biochemical modifications of other RNAs, precursors of miRNA, splicing, and telomerase activity. The small Cajal body-associated RNAs (scaRNAs) are a subset of the snoRNA family and collect in the Cajal body where they perform their canonical function to biochemically modify spliceosomal RNAs prior to maturation. Failure of sno/scaRNAs have been implicated in pathology such as congenital heart anomalies, neuromuscular disorders, and various malignancies. Thus, understanding of sno/scaRNAs demonstrates the clinical value.
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Affiliation(s)
- Thuy Cao
- Division of Cardiovascular Diseases, Department of Internal Medicine, Cardiovascular Research Institute, Kansas City, KS
| | - Sheeja Rajasingh
- Division of Cardiovascular Diseases, Department of Internal Medicine, Cardiovascular Research Institute, Kansas City, KS
| | - Saheli Samanta
- Division of Cardiovascular Diseases, Department of Internal Medicine, Cardiovascular Research Institute, Kansas City, KS
| | - Buddhadeb Dawn
- Division of Cardiovascular Diseases, Department of Internal Medicine, Cardiovascular Research Institute, Kansas City, KS
| | | | - Johnson Rajasingh
- Division of Cardiovascular Diseases, Department of Internal Medicine, Cardiovascular Research Institute, Kansas City, KS; Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, KS.
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21
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Mistriotis P, Andreadis ST. Vascular aging: Molecular mechanisms and potential treatments for vascular rejuvenation. Ageing Res Rev 2017; 37:94-116. [PMID: 28579130 DOI: 10.1016/j.arr.2017.05.006] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 05/22/2017] [Accepted: 05/25/2017] [Indexed: 12/14/2022]
Abstract
Aging is the main risk factor contributing to vascular dysfunction and the progression of vascular diseases. In this review, we discuss the causes and mechanisms of vascular aging at the tissue and cellular level. We focus on Endothelial Cell (EC) and Smooth Muscle Cell (SMC) aging due to their critical role in mediating the defective vascular phenotype. We elaborate on two categories that contribute to cellular dysfunction: cell extrinsic and intrinsic factors. Extrinsic factors reflect systemic or environmental changes which alter EC and SMC homeostasis compromising vascular function. Intrinsic factors induce EC and SMC transformation resulting in cellular senescence. Replenishing or rejuvenating the aged/dysfunctional vascular cells is critical to the effective repair of the vasculature. As such, this review also elaborates on recent findings which indicate that stem cell and gene therapies may restore the impaired vascular cell function, reverse vascular aging, and prolong lifespan.
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Affiliation(s)
- Panagiotis Mistriotis
- Bioengineering Laboratory, Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Amherst, NY 14260-4200, USA
| | - Stelios T Andreadis
- Bioengineering Laboratory, Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Amherst, NY 14260-4200, USA; Department of Biomedical Engineering, University at Buffalo, The State University of New York, Amherst, NY 14260-4200, USA; Center of Excellence in Bioinformatics and Life Sciences, Buffalo, NY 14203, USA.
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22
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Booth SA, Charchar FJ. Cardiac telomere length in heart development, function, and disease. Physiol Genomics 2017; 49:368-384. [DOI: 10.1152/physiolgenomics.00024.2017] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Telomeres are repetitive nucleoprotein structures at chromosome ends, and a decrease in the number of these repeats, known as a reduction in telomere length (TL), triggers cellular senescence and apoptosis. Heart disease, the worldwide leading cause of death, often results from the loss of cardiac cells, which could be explained by decreases in TL. Due to the cell-specific regulation of TL, this review focuses on studies that have measured telomeres in heart cells and critically assesses the relationship between cardiac TL and heart function. There are several lines of evidence that have identified rapid changes in cardiac TL during the onset and progression of heart disease as well as at critical stages of development. There are also many factors, such as the loss of telomeric proteins, oxidative stress, and hypoxia, that decrease cardiac TL and heart function. In contrast, antioxidants, calorie restriction, and exercise can prevent both cardiac telomere attrition and the progression of heart disease. TL in the heart is also indicative of proliferative potential and could facilitate the identification of cells suitable for cardiac rejuvenation. Although these findings highlight the involvement of TL in heart function, there are important questions regarding the validity of animal models, as well as several confounding factors, that need to be considered when interpreting results and planning future research. With these in mind, elucidating the telomeric mechanisms involved in heart development and the transition to disease holds promise to prevent cardiac dysfunction and potentiate regeneration after injury.
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Affiliation(s)
- S. A. Booth
- Faculty of Science and Technology, School of Applied and Biomedical Sciences, Federation University Australia, Balllarat, Australia
| | - F. J. Charchar
- Faculty of Science and Technology, School of Applied and Biomedical Sciences, Federation University Australia, Balllarat, Australia
- Department of Physiology, The University of Melbourne, Melbourne, Australia; and
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom
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23
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Lifespan adversity and later adulthood telomere length in the nationally representative US Health and Retirement Study. Proc Natl Acad Sci U S A 2016; 113:E6335-E6342. [PMID: 27698131 DOI: 10.1073/pnas.1525602113] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Stress over the lifespan is thought to promote accelerated aging and early disease. Telomere length is a marker of cell aging that appears to be one mediator of this relationship. Telomere length is associated with early adversity and with chronic stressors in adulthood in many studies. Although cumulative lifespan adversity should have bigger impacts than single events, it is also possible that adversity in childhood has larger effects on later life health than adult stressors, as suggested by models of biological embedding in early life. No studies have examined the individual vs. cumulative effects of childhood and adulthood adversities on adult telomere length. Here, we examined the relationship between cumulative childhood and adulthood adversity, adding up a range of severe financial, traumatic, and social exposures, as well as comparing them to each other, in relation to salivary telomere length. We examined 4,598 men and women from the US Health and Retirement Study. Single adversities tended to have nonsignificant relations with telomere length. In adjusted models, lifetime cumulative adversity predicted 6% greater odds of shorter telomere length. This result was mainly due to childhood adversity. In adjusted models for cumulative childhood adversity, the occurrence of each additional childhood event predicted 11% increased odds of having short telomeres. This result appeared mainly because of social/traumatic exposures rather than financial exposures. This study suggests that the shadow of childhood adversity may reach far into later adulthood in part through cellular aging.
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Ait-Aissa K, Ebben JD, Kadlec AO, Beyer AM. Friend or foe? Telomerase as a pharmacological target in cancer and cardiovascular disease. Pharmacol Res 2016; 111:422-433. [PMID: 27394166 PMCID: PMC5026584 DOI: 10.1016/j.phrs.2016.07.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 07/01/2016] [Accepted: 07/02/2016] [Indexed: 12/20/2022]
Abstract
Aging, cancer, and chronic disease have remained at the forefront of basic biological research for decades. Within this context, significant attention has been paid to the role of telomerase, the enzyme responsible for lengthening telomeres, the nucleotide sequences located at the end of chromosomes found in the nucleus. Alterations in telomere length and telomerase activity are a common denominator to the underlying pathology of these diseases. While nuclear-specific, telomere-lengthening effects of telomerase impact cellular/organismal aging and cancer development, non-canonical, extra-nuclear, and non-telomere-lengthening contributions of telomerase have only recently been described and their exact physiological implications are ill defined. Although the mechanism remains unclear, recent reports reveal that the catalytic subunit of telomerase, telomerase reverse transcriptase (TERT), regulates levels of mitochondrial-derived reactive oxygen species (mtROS), independent of its established role in the nucleus. Telomerase inhibition has been the target of chemotherapy (directed or indirectly) for over a decade now, yet no telomerase inhibitor is FDA approved and few are currently in late-stage clinical trials, possibly due to underappreciation of the distinct extra-nuclear functions of telomerase. Moreover, evaluation of telomerase-specific therapies is largely limited to the context of chemotherapy, despite reports of the beneficial effects of telomerase activation in the cardiovascular system in relation to such processes as endothelial dysfunction and myocardial infarction. Thus, there is a need for better understanding of telomerase-focused cell and organism physiology, as well as development of telomerase-specific therapies in relation to cancer and extension of these therapies to cardiovascular pathologies. This review will detail findings related to telomerase and evaluate its potential to serve as a therapeutic target.
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Affiliation(s)
- Karima Ait-Aissa
- Department of Medicine
- Department of Physiology, Cardiovascular Center
| | - Johnathan D. Ebben
- Department of Pharmacology & Toxicology
- Cancer Center, Medical College of Wisconsin
| | - Andrew O. Kadlec
- Department of Medicine
- Department of Physiology, Cardiovascular Center
| | - Andreas M. Beyer
- Department of Medicine
- Department of Physiology, Cardiovascular Center
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Does Telomere Shortening Precede the Onset of Hypertension in Spontaneously Hypertensive Mice? Twin Res Hum Genet 2016; 19:422-9. [DOI: 10.1017/thg.2016.63] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Telomere length is widely considered as a marker of biological aging. Clinical studies have reported associations between reduced telomere length and hypertension. The aim of this study was to compare telomere length in hypertensive and normotensive mice at pre-disease and established disease time points to determine whether telomere length differs between the strains before and after the onset of disease. Genomic DNA was extracted from kidney and heart tissues of 4-, 12-, and 20-week-old male hypertensive (BPH/2J) and normotensive (BPN/3J) mice. Relative telomere length (T/S) was measured using quantitative PCR. Age was inversely correlated with telomere length in both strains. In 4-week-old pre-hypertensive animals, no difference in T/S was observed between BPH/2J and BPN/3J animals in kidney or heart tissue (kidney p = 0.14, heart p = 0.06). Once the animals had established disease, at 12 and 20 weeks, BPH/2J mice had significantly shorter telomeres when compared to their age-matched controls in both kidney (12 weeks p < 0.001 and 20 weeks p = 0.004) and heart tissues (12 weeks p < 0.001 and 20 weeks p < 0.001). This is the first study to show that differences in telomere lengths between BPH/2J and BPN/3J mice occur after the development of hypertension and do not cause hypertension in the BPH/2J mice.
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Tetzner A, Gebolys K, Meinert C, Klein S, Uhlich A, Trebicka J, Villacañas Ó, Walther T. G-Protein-Coupled Receptor MrgD Is a Receptor for Angiotensin-(1-7) Involving Adenylyl Cyclase, cAMP, and Phosphokinase A. Hypertension 2016; 68:185-94. [PMID: 27217404 DOI: 10.1161/hypertensionaha.116.07572] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 04/08/2016] [Indexed: 12/12/2022]
Abstract
Angiotensin (Ang)-(1-7) has cardiovascular protective effects and is the opponent of the often detrimental Ang II within the renin-angiotensin system. Although it is well accepted that the G-protein-coupled receptor Mas is a receptor for the heptapeptide, the lack in knowing initial signaling molecules stimulated by Ang-(1-7) prevented definitive characterization of ligand/receptor pharmacology as well as identification of further hypothesized receptors for the heptapeptide. The study aimed to identify a second messenger stimulated by Ang-(1-7) allowing confirmation as well as discovery of the heptapeptide's receptors. Ang-(1-7) elevates cAMP concentration in primary cells, such as endothelial or mesangial cells. Using cAMP as readout in receptor-transfected human embryonic kidney (HEK293) cells, we provided pharmacological proof that Mas is a functional receptor for Ang-(1-7). Moreover, we identified the G-protein-coupled receptor MrgD as a second receptor for Ang-(1-7). Consequently, the heptapeptide failed to increase cAMP concentration in primary mesangial cells with genetic deficiency in both Mas and MrgD Mice deficient in MrgD showed an impaired hemodynamic response after Ang-(1-7) administration. Furthermore, we excluded the Ang II type 2 receptor as a receptor for the heptapeptide but discovered that the Ang II type 2 blocker PD123319 can also block Mas and MrgD receptors. Our results lead to an expansion and partial revision of the renin-angiotensin system, by identifying a second receptor for Ang-(1-7), by excluding Ang II type 2 as a receptor for the heptapeptide, and by enforcing the revisit of such publications which concluded Ang II type 2 function by only using PD123319.
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Affiliation(s)
- Anja Tetzner
- From the Department of Pharmacology and Therapeutics, School of Medicine, School of Pharmacy, University College Cork (UCC), Cork, Ireland (A.T., K.G., C.M., A.U., T.W.); Departments Obstetrics (A.T., T.W.) and Pediatric Surgery (A.T., T.W.), University of Leipzig, Leipzig, Germany; Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany (C.M.); Department of Internal Medicine I, University of Bonn, Bonn, Germany (S.K., J.T.); and Computational Chemistry Department, Intelligent Pharma S.L., Barcelona, Spain (Ó.V.)
| | - Kinga Gebolys
- From the Department of Pharmacology and Therapeutics, School of Medicine, School of Pharmacy, University College Cork (UCC), Cork, Ireland (A.T., K.G., C.M., A.U., T.W.); Departments Obstetrics (A.T., T.W.) and Pediatric Surgery (A.T., T.W.), University of Leipzig, Leipzig, Germany; Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany (C.M.); Department of Internal Medicine I, University of Bonn, Bonn, Germany (S.K., J.T.); and Computational Chemistry Department, Intelligent Pharma S.L., Barcelona, Spain (Ó.V.)
| | - Christian Meinert
- From the Department of Pharmacology and Therapeutics, School of Medicine, School of Pharmacy, University College Cork (UCC), Cork, Ireland (A.T., K.G., C.M., A.U., T.W.); Departments Obstetrics (A.T., T.W.) and Pediatric Surgery (A.T., T.W.), University of Leipzig, Leipzig, Germany; Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany (C.M.); Department of Internal Medicine I, University of Bonn, Bonn, Germany (S.K., J.T.); and Computational Chemistry Department, Intelligent Pharma S.L., Barcelona, Spain (Ó.V.)
| | - Sabine Klein
- From the Department of Pharmacology and Therapeutics, School of Medicine, School of Pharmacy, University College Cork (UCC), Cork, Ireland (A.T., K.G., C.M., A.U., T.W.); Departments Obstetrics (A.T., T.W.) and Pediatric Surgery (A.T., T.W.), University of Leipzig, Leipzig, Germany; Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany (C.M.); Department of Internal Medicine I, University of Bonn, Bonn, Germany (S.K., J.T.); and Computational Chemistry Department, Intelligent Pharma S.L., Barcelona, Spain (Ó.V.)
| | - Anja Uhlich
- From the Department of Pharmacology and Therapeutics, School of Medicine, School of Pharmacy, University College Cork (UCC), Cork, Ireland (A.T., K.G., C.M., A.U., T.W.); Departments Obstetrics (A.T., T.W.) and Pediatric Surgery (A.T., T.W.), University of Leipzig, Leipzig, Germany; Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany (C.M.); Department of Internal Medicine I, University of Bonn, Bonn, Germany (S.K., J.T.); and Computational Chemistry Department, Intelligent Pharma S.L., Barcelona, Spain (Ó.V.)
| | - Jonel Trebicka
- From the Department of Pharmacology and Therapeutics, School of Medicine, School of Pharmacy, University College Cork (UCC), Cork, Ireland (A.T., K.G., C.M., A.U., T.W.); Departments Obstetrics (A.T., T.W.) and Pediatric Surgery (A.T., T.W.), University of Leipzig, Leipzig, Germany; Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany (C.M.); Department of Internal Medicine I, University of Bonn, Bonn, Germany (S.K., J.T.); and Computational Chemistry Department, Intelligent Pharma S.L., Barcelona, Spain (Ó.V.)
| | - Óscar Villacañas
- From the Department of Pharmacology and Therapeutics, School of Medicine, School of Pharmacy, University College Cork (UCC), Cork, Ireland (A.T., K.G., C.M., A.U., T.W.); Departments Obstetrics (A.T., T.W.) and Pediatric Surgery (A.T., T.W.), University of Leipzig, Leipzig, Germany; Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany (C.M.); Department of Internal Medicine I, University of Bonn, Bonn, Germany (S.K., J.T.); and Computational Chemistry Department, Intelligent Pharma S.L., Barcelona, Spain (Ó.V.)
| | - Thomas Walther
- From the Department of Pharmacology and Therapeutics, School of Medicine, School of Pharmacy, University College Cork (UCC), Cork, Ireland (A.T., K.G., C.M., A.U., T.W.); Departments Obstetrics (A.T., T.W.) and Pediatric Surgery (A.T., T.W.), University of Leipzig, Leipzig, Germany; Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University Heidelberg, Mannheim, Germany (C.M.); Department of Internal Medicine I, University of Bonn, Bonn, Germany (S.K., J.T.); and Computational Chemistry Department, Intelligent Pharma S.L., Barcelona, Spain (Ó.V.).
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Bautista-Niño PK, Portilla-Fernandez E, Vaughan DE, Danser AHJ, Roks AJM. DNA Damage: A Main Determinant of Vascular Aging. Int J Mol Sci 2016; 17:E748. [PMID: 27213333 PMCID: PMC4881569 DOI: 10.3390/ijms17050748] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/04/2016] [Accepted: 05/10/2016] [Indexed: 01/16/2023] Open
Abstract
Vascular aging plays a central role in health problems and mortality in older people. Apart from the impact of several classical cardiovascular risk factors on the vasculature, chronological aging remains the single most important determinant of cardiovascular problems. The causative mechanisms by which chronological aging mediates its impact, independently from classical risk factors, remain to be elucidated. In recent years evidence has accumulated that unrepaired DNA damage may play an important role. Observations in animal models and in humans indicate that under conditions during which DNA damage accumulates in an accelerated rate, functional decline of the vasculature takes place in a similar but more rapid or more exaggerated way than occurs in the absence of such conditions. Also epidemiological studies suggest a relationship between DNA maintenance and age-related cardiovascular disease. Accordingly, mouse models of defective DNA repair are means to study the mechanisms involved in biological aging of the vasculature. We here review the evidence of the role of DNA damage in vascular aging, and present mechanisms by which genomic instability interferes with regulation of the vascular tone. In addition, we present potential remedies against vascular aging induced by genomic instability. Central to this review is the role of diverse types of DNA damage (telomeric, non-telomeric and mitochondrial), of cellular changes (apoptosis, senescence, autophagy), mediators of senescence and cell growth (plasminogen activator inhibitor-1 (PAI-1), cyclin-dependent kinase inhibitors, senescence-associated secretory phenotype (SASP)/senescence-messaging secretome (SMS), insulin and insulin-like growth factor 1 (IGF-1) signaling), the adenosine monophosphate-activated protein kinase (AMPK)-mammalian target of rapamycin (mTOR)-nuclear factor kappa B (NFκB) axis, reactive oxygen species (ROS) vs. endothelial nitric oxide synthase (eNOS)-cyclic guanosine monophosphate (cGMP) signaling, phosphodiesterase (PDE) 1 and 5, transcription factor NF-E2-related factor-2 (Nrf2), and diet restriction.
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Affiliation(s)
- Paula K Bautista-Niño
- Department of Internal Medicine, Division of Vascular Medicine and Pharmacology, Erasmus Medical Center, Rotterdam 3015 CN, The Netherlands.
- Department of Epidemiology, Erasmus Medical Center, Rotterdam 3015 CN, The Netherlands.
| | - Eliana Portilla-Fernandez
- Department of Internal Medicine, Division of Vascular Medicine and Pharmacology, Erasmus Medical Center, Rotterdam 3015 CN, The Netherlands.
- Department of Epidemiology, Erasmus Medical Center, Rotterdam 3015 CN, The Netherlands.
| | - Douglas E Vaughan
- Department of Medicine & Feinberg Cardiovascular Research Institute, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
| | - A H Jan Danser
- Department of Internal Medicine, Division of Vascular Medicine and Pharmacology, Erasmus Medical Center, Rotterdam 3015 CN, The Netherlands.
| | - Anton J M Roks
- Department of Internal Medicine, Division of Vascular Medicine and Pharmacology, Erasmus Medical Center, Rotterdam 3015 CN, The Netherlands.
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Telomere Length Maintenance and Cardio-Metabolic Disease Prevention Through Exercise Training. Sports Med 2016; 46:1213-37. [DOI: 10.1007/s40279-016-0482-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Duraimani S, Schneider RH, Randall OS, Nidich SI, Xu S, Ketete M, Rainforth MA, Gaylord-King C, Salerno JW, Fagan J. Effects of Lifestyle Modification on Telomerase Gene Expression in Hypertensive Patients: A Pilot Trial of Stress Reduction and Health Education Programs in African Americans. PLoS One 2015; 10:e0142689. [PMID: 26571023 PMCID: PMC4646647 DOI: 10.1371/journal.pone.0142689] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 10/25/2015] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND African Americans suffer from disproportionately high rates of hypertension and cardiovascular disease. Psychosocial stress, lifestyle and telomere dysfunction contribute to the pathogenesis of hypertension and cardiovascular disease. This study evaluated effects of stress reduction and lifestyle modification on blood pressure, telomerase gene expression and lifestyle factors in African Americans. METHODS Forty-eight African American men and women with stage I hypertension who participated in a larger randomized controlled trial volunteered for this substudy. These subjects participated in either stress reduction with the Transcendental Meditation technique and a basic health education course (SR) or an extensive health education program (EHE) for 16 weeks. Primary outcomes were telomerase gene expression (hTERT and hTR) and clinic blood pressure. Secondary outcomes included lifestyle-related factors. Data were analyzed for within-group and between-group changes. RESULTS Both groups showed increases in the two measures of telomerase gene expression, hTR mRNA levels (SR: p< 0.001; EHE: p< 0.001) and hTERT mRNA levels (SR: p = 0.055; EHE: p< 0.002). However, no statistically significant between-group changes were observed. Both groups showed reductions in systolic BP. Adjusted changes were SR = -5.7 mm Hg, p< 0.01; EHE = -9.0 mm Hg, p < 0.001 with no statistically significant difference between group difference. There was a significant reduction in diastolic BP in the EHE group (-5.3 mm Hg, p< 0.001) but not in SR (-1.2 mm Hg, p = 0.42); the between-group difference was significant (p = 0.04). The EHE group showed a greater number of changes in lifestyle behaviors. CONCLUSION In this pilot trial, both stress reduction (Transcendental Meditation technique plus health education) and extensive health education groups demonstrated increased telomerase gene expression and reduced BP. The association between increased telomerase gene expression and reduced BP observed in this high-risk population suggest hypotheses that telomerase gene expression may either be a biomarker for reduced BP or a mechanism by which stress reduction and lifestyle modification reduces BP. TRIAL REGISTRATION ClinicalTrials.gov NCT00681200.
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Affiliation(s)
- Shanthi Duraimani
- Center for Natural Medicine and Prevention, Maharishi University of Management Research Institute, Maharishi Vedic City, Iowa, United States of America
- Department of Physiology and Health, Maharishi University of Management, Fairfield, Iowa, United States of America
- MUM Molecular Biology Laboratory, Maharishi University of Management, Fairfield Iowa, United States of America
| | - Robert H. Schneider
- Center for Natural Medicine and Prevention, Maharishi University of Management Research Institute, Maharishi Vedic City, Iowa, United States of America
- Department of Physiology and Health, Maharishi University of Management, Fairfield, Iowa, United States of America
| | - Otelio S. Randall
- Howard University College of Medicine, Department of Internal Medicine, Division of Cardiology, Washington DC, United States of America
| | - Sanford I. Nidich
- Center for Natural Medicine and Prevention, Maharishi University of Management Research Institute, Maharishi Vedic City, Iowa, United States of America
- Department of Physiology and Health, Maharishi University of Management, Fairfield, Iowa, United States of America
| | - Shichen Xu
- Howard University College of Medicine, Department of Internal Medicine, Division of Cardiology, Washington DC, United States of America
| | - Muluemebet Ketete
- Howard University College of Medicine, Department of Internal Medicine, Division of Cardiology, Washington DC, United States of America
| | - Maxwell A. Rainforth
- Center for Natural Medicine and Prevention, Maharishi University of Management Research Institute, Maharishi Vedic City, Iowa, United States of America
| | - Carolyn Gaylord-King
- Center for Natural Medicine and Prevention, Maharishi University of Management Research Institute, Maharishi Vedic City, Iowa, United States of America
| | - John W. Salerno
- Center for Natural Medicine and Prevention, Maharishi University of Management Research Institute, Maharishi Vedic City, Iowa, United States of America
| | - John Fagan
- Department of Physiology and Health, Maharishi University of Management, Fairfield, Iowa, United States of America
- MUM Molecular Biology Laboratory, Maharishi University of Management, Fairfield Iowa, United States of America
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Lian F, Wang J, Huang X, Wu Y, Cao Y, Tan X, Xu X, Hong Y, Yang L, Gao X. Effect of vegetable consumption on the association between peripheral leucocyte telomere length and hypertension: a case-control study. BMJ Open 2015; 5:e009305. [PMID: 26560064 PMCID: PMC4654285 DOI: 10.1136/bmjopen-2015-009305] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES Peripheral leucocyte telomere length has been suggested to be inversely associated with hypertension risk. Both telomere length and hypertension risk can be modified by certain dietary factors, such as fruit and vegetables. This study was to examine the potential effect of these dietary factors on the association between telomere length and hypertension risk. STUDY DESIGN A community-based case-control study. PARTICIPANTS 271 hypertensive patients and 455 normotensive controls aged 40-70 years and living in Yinzhou, Zhejiang Province, China. OUTCOME MEASURES Peripheral leucocyte relative telomere length (RTL) was measured using quantitative real-time PCR. Dietary intake was assessed by a brief semiquantitative food frequency questionnaire. The association between RTL and hypertension risk was analysed using logistic regression, and the modulatory effect of dietary intake on RTL-related hypertension risk was analysed using likelihood ratio tests. RESULTS Among controls, longer age-adjusted RTL was associated with higher vegetable intake (p=0.01). Individuals with longer age-adjusted RTL (based on median value) were 30% less likely to have hypertension (OR=0.70, 95% CI 0.52 to 0.96; p=0.03). The observed RTL-hypertension relationship appeared to be modified by vegetable intake-longer RTL was significantly associated with lower hypertension risk only in those with greater vegetable consumption (OR=0.28, 95% CI 0.14 to 0.57; p<0.001), but not in those with lower vegetable intake (P-interaction=0.008). CONCLUSIONS Certain dietary factors might modify telomere-related hypertension risk.
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Affiliation(s)
- Fuzhi Lian
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Jinquan Wang
- School of Life Science, Shihezi University, Shihezi, Xinjiang Uighur Autonomous Region, China
| | - Xianhong Huang
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Yinyin Wu
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Yifei Cao
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Xiaohua Tan
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Xianrong Xu
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Yu Hong
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Lei Yang
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
- School of Life Science, Shihezi University, Shihezi, Xinjiang Uighur Autonomous Region, China
| | - Xiang Gao
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, Pennsylvania, USA
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González-Núñez M, Riolobos AS, Castellano O, Fuentes-Calvo I, de los Ángeles Sevilla M, Oujo B, Pericacho M, Cruz-Gonzalez I, Pérez-Barriocanal F, ten Dijke P, López-Novoa JM. Heterozygous disruption of activin receptor-like kinase 1 is associated with increased arterial pressure in mice. Dis Model Mech 2015; 8:1427-39. [PMID: 26398936 PMCID: PMC4631783 DOI: 10.1242/dmm.019695] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 08/27/2015] [Indexed: 12/20/2022] Open
Abstract
The activin receptor-like kinase 1 (ALK-1) is a type I cell-surface receptor for the transforming growth factor-β (TGF-β) family of proteins. Hypertension is related to TGF-β1, because increased TGF-β1 expression is correlated with an elevation in arterial pressure (AP) and TGF-β expression is upregulated by the renin-angiotensin-aldosterone system. The purpose of this study was to assess the role of ALK-1 in regulation of AP using Alk1 haploinsufficient mice (Alk1(+/-)). We observed that systolic and diastolic AP were significantly higher in Alk1(+/-) than in Alk1(+/+) mice, and all functional and structural cardiac parameters (echocardiography and electrocardiography) were similar in both groups. Alk1(+/-) mice showed alterations in the circadian rhythm of AP, with higher AP than Alk1(+/+) mice during most of the light period. Higher AP in Alk1(+/-) mice is not a result of a reduction in the NO-dependent vasodilator response or of overactivation of the peripheral renin-angiotensin system. However, intracerebroventricular administration of losartan had a hypotensive effect in Alk1(+/-) and not in Alk1(+/+) mice. Alk1(+/-) mice showed a greater hypotensive response to the β-adrenergic antagonist atenolol and higher concentrations of epinephrine and norepinephrine in plasma than Alk1(+/+) mice. The number of brain cholinergic neurons in the anterior basal forebrain was reduced in Alk1(+/-) mice. Thus, we concluded that the ALK-1 receptor is involved in the control of AP, and the high AP of Alk1(+/-) mice is explained mainly by the sympathetic overactivation shown by these animals, which is probably related to the decreased number of cholinergic neurons.
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Affiliation(s)
- María González-Núñez
- Departamento de Fisiología y Farmacología, Universidad de Salamanca, Salamanca 37007, Spain Unidad de Fisiopatología Renal y Cardiovascular, Instituto 'Reina Sofía' de Investigación Nefrológica, Salamanca 37007, Spain Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca 37007, Spain
| | - Adela S Riolobos
- Departamento de Fisiología y Farmacología, Universidad de Salamanca, Salamanca 37007, Spain Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca 37007, Spain Instituto de Neurociencias de Castilla y León (INCYL), Salamanca 37008, Spain
| | - Orlando Castellano
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca 37007, Spain Instituto de Neurociencias de Castilla y León (INCYL), Salamanca 37008, Spain
| | - Isabel Fuentes-Calvo
- Departamento de Fisiología y Farmacología, Universidad de Salamanca, Salamanca 37007, Spain Unidad de Fisiopatología Renal y Cardiovascular, Instituto 'Reina Sofía' de Investigación Nefrológica, Salamanca 37007, Spain Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca 37007, Spain
| | | | - Bárbara Oujo
- Departamento de Fisiología y Farmacología, Universidad de Salamanca, Salamanca 37007, Spain Unidad de Fisiopatología Renal y Cardiovascular, Instituto 'Reina Sofía' de Investigación Nefrológica, Salamanca 37007, Spain Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca 37007, Spain
| | - Miguel Pericacho
- Departamento de Fisiología y Farmacología, Universidad de Salamanca, Salamanca 37007, Spain Unidad de Fisiopatología Renal y Cardiovascular, Instituto 'Reina Sofía' de Investigación Nefrológica, Salamanca 37007, Spain Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca 37007, Spain
| | - Ignacio Cruz-Gonzalez
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca 37007, Spain Departamento de Cardiología, Hospital Universitario de Salamanca, Salamanca 37007, Spain
| | - Fernando Pérez-Barriocanal
- Departamento de Fisiología y Farmacología, Universidad de Salamanca, Salamanca 37007, Spain Unidad de Fisiopatología Renal y Cardiovascular, Instituto 'Reina Sofía' de Investigación Nefrológica, Salamanca 37007, Spain Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca 37007, Spain
| | - Peter ten Dijke
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden 2333 ZA, The Netherlands
| | - Jose M López-Novoa
- Departamento de Fisiología y Farmacología, Universidad de Salamanca, Salamanca 37007, Spain Unidad de Fisiopatología Renal y Cardiovascular, Instituto 'Reina Sofía' de Investigación Nefrológica, Salamanca 37007, Spain Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca 37007, Spain
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Ma L, Li Y, Wang J. Telomeres and essential hypertension. Clin Biochem 2015; 48:1195-9. [PMID: 26169243 DOI: 10.1016/j.clinbiochem.2015.07.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 07/05/2015] [Accepted: 07/08/2015] [Indexed: 01/07/2023]
Abstract
OBJECTIVES This review aims to clarify the relationship between telomeres and essential hypertension. DESIGN AND METHODS A PubMed search and a critical review were performed relating to studies about the clinical and biological relevance of telomeres in essential hypertension. RESULTS Telomeres and telomerase activity play an important role in the occurrence and development of hypertension in both animal and human studies. CONCLUSIONS A more complete understanding of the molecular mechanisms underlying the development of hypertension could reduce the incidence of hypertension-related diseases.
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Affiliation(s)
- Lina Ma
- Department of Geriatrics, Xuan Wu Hospital, Capital Medical University, Beijing 100053, China.
| | - Yun Li
- Department of Geriatrics, Xuan Wu Hospital, Capital Medical University, Beijing 100053, China.
| | - Jieyu Wang
- Department of Geriatrics, Xuan Wu Hospital, Capital Medical University, Beijing 100053, China.
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Ramunas J, Yakubov E, Brady JJ, Corbel SY, Holbrook C, Brandt M, Stein J, Santiago JG, Cooke JP, Blau HM. Transient delivery of modified mRNA encoding TERT rapidly extends telomeres in human cells. FASEB J 2015; 29:1930-9. [PMID: 25614443 DOI: 10.1096/fj.14-259531] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 12/31/2014] [Indexed: 12/13/2022]
Abstract
Telomere extension has been proposed as a means to improve cell culture and tissue engineering and to treat disease. However, telomere extension by nonviral, nonintegrating methods remains inefficient. Here we report that delivery of modified mRNA encoding TERT to human fibroblasts and myoblasts increases telomerase activity transiently (24-48 h) and rapidly extends telomeres, after which telomeres resume shortening. Three successive transfections over a 4 d period extended telomeres up to 0.9 kb in a cell type-specific manner in fibroblasts and myoblasts and conferred an additional 28 ± 1.5 and 3.4 ± 0.4 population doublings (PDs), respectively. Proliferative capacity increased in a dose-dependent manner. The second and third transfections had less effect on proliferative capacity than the first, revealing a refractory period. However, the refractory period was transient as a later fourth transfection increased fibroblast proliferative capacity by an additional 15.2 ± 1.1 PDs, similar to the first transfection. Overall, these treatments led to an increase in absolute cell number of more than 10(12)-fold. Notably, unlike immortalized cells, all treated cell populations eventually stopped increasing in number and expressed senescence markers to the same extent as untreated cells. This rapid method of extending telomeres and increasing cell proliferative capacity without risk of insertional mutagenesis should have broad utility in disease modeling, drug screening, and regenerative medicine.
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Affiliation(s)
- John Ramunas
- *Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Clinical Sciences Research Center, Stanford University School of Medicine, Stanford, California, USA; Falk Cardiovascular Research Center, Stanford University School of Medicine, Stanford, California, USA; SpectraCell Laboratories, Inc., Houston, Texas, USA; and Department of Mechanical Engineering, Stanford University, Stanford, California, USA
| | - Eduard Yakubov
- *Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Clinical Sciences Research Center, Stanford University School of Medicine, Stanford, California, USA; Falk Cardiovascular Research Center, Stanford University School of Medicine, Stanford, California, USA; SpectraCell Laboratories, Inc., Houston, Texas, USA; and Department of Mechanical Engineering, Stanford University, Stanford, California, USA
| | - Jennifer J Brady
- *Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Clinical Sciences Research Center, Stanford University School of Medicine, Stanford, California, USA; Falk Cardiovascular Research Center, Stanford University School of Medicine, Stanford, California, USA; SpectraCell Laboratories, Inc., Houston, Texas, USA; and Department of Mechanical Engineering, Stanford University, Stanford, California, USA
| | - Stéphane Y Corbel
- *Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Clinical Sciences Research Center, Stanford University School of Medicine, Stanford, California, USA; Falk Cardiovascular Research Center, Stanford University School of Medicine, Stanford, California, USA; SpectraCell Laboratories, Inc., Houston, Texas, USA; and Department of Mechanical Engineering, Stanford University, Stanford, California, USA
| | - Colin Holbrook
- *Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Clinical Sciences Research Center, Stanford University School of Medicine, Stanford, California, USA; Falk Cardiovascular Research Center, Stanford University School of Medicine, Stanford, California, USA; SpectraCell Laboratories, Inc., Houston, Texas, USA; and Department of Mechanical Engineering, Stanford University, Stanford, California, USA
| | - Moritz Brandt
- *Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Clinical Sciences Research Center, Stanford University School of Medicine, Stanford, California, USA; Falk Cardiovascular Research Center, Stanford University School of Medicine, Stanford, California, USA; SpectraCell Laboratories, Inc., Houston, Texas, USA; and Department of Mechanical Engineering, Stanford University, Stanford, California, USA
| | - Jonathan Stein
- *Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Clinical Sciences Research Center, Stanford University School of Medicine, Stanford, California, USA; Falk Cardiovascular Research Center, Stanford University School of Medicine, Stanford, California, USA; SpectraCell Laboratories, Inc., Houston, Texas, USA; and Department of Mechanical Engineering, Stanford University, Stanford, California, USA
| | - Juan G Santiago
- *Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Clinical Sciences Research Center, Stanford University School of Medicine, Stanford, California, USA; Falk Cardiovascular Research Center, Stanford University School of Medicine, Stanford, California, USA; SpectraCell Laboratories, Inc., Houston, Texas, USA; and Department of Mechanical Engineering, Stanford University, Stanford, California, USA
| | - John P Cooke
- *Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Clinical Sciences Research Center, Stanford University School of Medicine, Stanford, California, USA; Falk Cardiovascular Research Center, Stanford University School of Medicine, Stanford, California, USA; SpectraCell Laboratories, Inc., Houston, Texas, USA; and Department of Mechanical Engineering, Stanford University, Stanford, California, USA
| | - Helen M Blau
- *Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Clinical Sciences Research Center, Stanford University School of Medicine, Stanford, California, USA; Falk Cardiovascular Research Center, Stanford University School of Medicine, Stanford, California, USA; SpectraCell Laboratories, Inc., Houston, Texas, USA; and Department of Mechanical Engineering, Stanford University, Stanford, California, USA
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Telomere length and polyunsaturated fatty acids. Nutrition 2014; 30:1218-21. [DOI: 10.1016/j.nut.2014.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 04/02/2014] [Indexed: 11/19/2022]
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De Mey JGR, Vanhoutte PM. End o' the line revisited: moving on from nitric oxide to CGRP. Life Sci 2014; 118:120-8. [PMID: 24747136 DOI: 10.1016/j.lfs.2014.04.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 04/04/2014] [Accepted: 04/05/2014] [Indexed: 12/24/2022]
Abstract
When endothelin-1(ET-1) was discovered it was hailed as the prototypical endothelium-derived contracting factor (EDCF). However, over the years little evidence emerged convincingly demonstrating that the peptide actually contributes to moment-to-moment changes in vascular tone elicited by endothelial cells. This has been attributed to the profound inhibitory effect of nitric oxide (NO) on both the production (by the endothelium) and the action (on vascular smooth muscle) of ET-1. Hence, the peptide is likely to initiate acute changes in vascular diameter only under extreme conditions of endothelial dysfunction when the NO bioavailability is considerably reduced if not absent. The present essay discusses whether or not this concept should be revised, in particular in view of the potent inhibitory effect exerted by calcitonin gene related peptide (CGRP) released from sensorimotor nerves on vasoconstrictor responses to ET-1.
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Affiliation(s)
- Jo G R De Mey
- Institute of Molecular Medicine, University of South Denmark, Odense, Denmark; Cardiovascular Research Institute Maastricht, Maastricht, the Netherlands
| | - Paul M Vanhoutte
- Institute of Molecular Medicine, University of South Denmark, Odense, Denmark; Department of Pharmacology and Pharmacy and State Key Laboratory for Pharmaceutical Biotechnology, University of Hong Kong, Hong Kong, China.
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Wu H, Roks AJ. Genomic instability and vascular aging: A focus on nucleotide excision repair. Trends Cardiovasc Med 2014; 24:61-8. [DOI: 10.1016/j.tcm.2013.06.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Revised: 06/19/2013] [Accepted: 06/20/2013] [Indexed: 11/26/2022]
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Zhang DH, Wen XM, Zhang L, Cui W. DNA Methylation of Human Telomerase Reverse Transcriptase Associated With Leukocyte Telomere Length Shortening in Hyperhomocysteinemia-Type Hypertension in Humans and in a Rat Model. Circ J 2014; 78:1915-23. [DOI: 10.1253/circj.cj-14-0233] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dong-hong Zhang
- Department of Clinical Laboratory, Peking Union Medical College Hospital and Peking Union Medical College
| | - Xue-mei Wen
- Department of Clinical Laboratory, Peking Union Medical College Hospital and Peking Union Medical College
| | - Lin Zhang
- Department of Clinical Laboratory, Peking Union Medical College Hospital and Peking Union Medical College
| | - Wei Cui
- Department of Clinical Laboratory, Peking Union Medical College Hospital and Peking Union Medical College
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Martínez-Miguel P, Medrano-Andrés D, Lopes-Martín V, Arribas-Gómez I, Rodríguez-Puyol M, Rodríguez-Puyol D, López-Ongil S. Regulation of endothelin-converting enzyme-1 (ECE-1) by the calcimimetic R-568. Pharmacol Res 2013; 76:106-18. [DOI: 10.1016/j.phrs.2013.07.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/17/2013] [Accepted: 07/24/2013] [Indexed: 11/28/2022]
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Puterman E, Epel ES, Lin J, Blackburn EH, Gross JJ, Whooley MA, Cohen BE. Multisystem resiliency moderates the major depression-telomere length association: findings from the Heart and Soul Study. Brain Behav Immun 2013; 33:65-73. [PMID: 23727245 PMCID: PMC3855878 DOI: 10.1016/j.bbi.2013.05.008] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 05/20/2013] [Accepted: 05/23/2013] [Indexed: 01/20/2023] Open
Abstract
Major depressive disorder (MDD) has been associated with reduced leukocyte telomere length (LTL). It is not known, however, whether psychosocial and behavioral protective factors moderate this association. In the current study, we examine whether multisystem resiliency--defined by healthy emotion regulation, strong social connections, and health behaviors (sleep and exercise)--predicts LTL and mitigates previously demonstrated associations between depression diagnosis and LTL. LTL was measured, using a quantitative PCR assay, in 954 patients with stable cardiovascular disease in the Heart and Soul Study. In a fully adjusted model, high multisystem resiliency predicted longer LTL (b=80.00, SE=27.17, p=.003), whereas each individual factor did not. Multisystem resiliency significantly moderated the MDD-LTL association (p=.02). Specifically, MDD was significantly related to LTL at 1 SD below the mean of multisystem resiliency (b=-142.86, SE=56.46, p=.01), but not at 1 SD above the mean (b=49.07, SE=74.51, p=.51). This study suggests that MDD associations with biological outcomes should be examined within a psychosocial-behavioral context, because this context shapes the nature of the direct relationship. Further research should explore the cognitive, neural, and other physiological pathways through which multisystem resiliency may confer biological benefit.
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Affiliation(s)
- Eli Puterman
- University of California San Francisco, 3333 California Street Suite 465, San Francisco, CA 94143-0848, United States.
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Non-homologous end-joining pathway associated with occurrence of myocardial infarction: gene set analysis of genome-wide association study data. PLoS One 2013; 8:e56262. [PMID: 23457540 PMCID: PMC3574159 DOI: 10.1371/journal.pone.0056262] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Accepted: 01/07/2013] [Indexed: 01/28/2023] Open
Abstract
PURPOSE DNA repair deficiencies have been postulated to play a role in the development and progression of cardiovascular disease (CVD). The hypothesis is that DNA damage accumulating with age may induce cell death, which promotes formation of unstable plaques. Defects in DNA repair mechanisms may therefore increase the risk of CVD events. We examined whether the joints effect of common genetic variants in 5 DNA repair pathways may influence the risk of CVD events. METHODS The PLINK set-based test was used to examine the association to myocardial infarction (MI) of the DNA repair pathway in GWAS data of 866 subjects of the GENetic DEterminants of Restenosis (GENDER) study and 5,244 subjects of the PROspective Study of Pravastatin in the Elderly at Risk (PROSPER) study. We included the main DNA repair pathways (base excision repair, nucleotide excision repair, mismatch repair, homologous recombination and non-homologous end-joining (NHEJ)) in the analysis. RESULTS The NHEJ pathway was associated with the occurrence of MI in both GENDER (P = 0.0083) and PROSPER (P = 0.014). This association was mainly driven by genetic variation in the MRE11A gene (PGENDER = 0.0001 and PPROSPER = 0.002). The homologous recombination pathway was associated with MI in GENDER only (P = 0.011), for the other pathways no associations were observed. CONCLUSION This is the first study analyzing the joint effect of common genetic variation in DNA repair pathways and the risk of CVD events, demonstrating an association between the NHEJ pathway and MI in 2 different cohorts.
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Cervelli T, Borghini A, Galli A, Andreassi MG. DNA damage and repair in atherosclerosis: current insights and future perspectives. Int J Mol Sci 2012; 13:16929-44. [PMID: 23443128 PMCID: PMC3546731 DOI: 10.3390/ijms131216929] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 11/20/2012] [Accepted: 12/05/2012] [Indexed: 11/16/2022] Open
Abstract
Atherosclerosis is the leading cause of morbidity and mortality among Western populations. Over the past two decades, considerable evidence has supported a crucial role for DNA damage in the development and progression of atherosclerosis. These findings support the concept that the prolonged exposure to risk factors (e.g., dyslipidemia, smoking and diabetes mellitus) leading to reactive oxygen species are major stimuli for DNA damage within the plaque. Genomic instability at the cellular level can directly affect vascular function, leading to cell cycle arrest, apoptosis and premature vascular senescence. The purpose of this paper is to review current knowledge on the role of DNA damage and DNA repair systems in atherosclerosis, as well as to discuss the cellular response to DNA damage in order to shed light on possible strategies for prevention and treatment.
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Affiliation(s)
- Tiziana Cervelli
- Institute of Clinical Physiology, CNR (The National Research Council), via Moruzzi 1, 56124 Pisa, Italy.
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Puterman E, Epel E. An intricate dance: Life experience, multisystem resiliency, and rate of telomere decline throughout the lifespan. SOCIAL AND PERSONALITY PSYCHOLOGY COMPASS 2012; 6:807-825. [PMID: 23162608 PMCID: PMC3496269 DOI: 10.1111/j.1751-9004.2012.00465.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Accumulation of life stressors predicts accelerated development and progression of diseases of aging. Telomere length, the DNA-based biomarker indicating cellular aging, is a mechanism of disease development, and is shortened in a dose response fashion by duration and severity of life stressor exposures. Telomere length captures the interplay between genetics, life experiences and psychosocial and behavioral factors. Over the past several years, psychological stress resilience, healthy lifestyle factors, and social connections have been associated with longer telomere length and it appears that these factors can protect individuals from stress-induced telomere shortening. In the current review, we highlight these findings, and illustrate that combining these `multisystem resiliency' factors may strengthen our understanding of aging, as these powerful factors are often neglected in studies of aging. In naturalistic studies, the effects of chronic stress exposure on biological pathways are rarely main effects, but rather a complex interplay between adversity and resiliency factors. We suggest that chronic stress effects can be best understood by directly testing if the deleterious effects of stress on biological aging processes, in this case the cell allostasis measure of telomere shortening, are mitigated in individuals with high levels of multisystem resiliency. Without attending to such interactions, stress effects are often masked and missed. Taking account of the cluster of positive buffering factors that operate across the lifespan will take us a step further in understanding healthy aging. While these ideas are applied to the telomere length literature for illustration, the concept of multisystem resiliency might apply to aging broadly, from cellular to systemic health.
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García G, Serrano I, Sánchez-Alonso P, Rodríguez-Puyol M, Alajarín R, Griera M, Vaquero JJ, Rodríguez-Puyol D, Álvarez-Builla J, Díez-Marqués ML. New losartan-hydrocaffeic acid hybrids as antihypertensive-antioxidant dual drugs: Ester, amide and amine linkers. Eur J Med Chem 2012; 50:90-101. [DOI: 10.1016/j.ejmech.2012.01.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 12/05/2011] [Accepted: 01/22/2012] [Indexed: 10/14/2022]
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Schwartz J, Bellinger D, Glass T. Exploring potential sources of differential vulnerability and susceptibility in risk from environmental hazards to expand the scope of risk assessment. Am J Public Health 2011; 101 Suppl 1:S94-101. [PMID: 22021315 DOI: 10.2105/ajph.2011.300272] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Genetic factors, other exposures, individual disease states and allostatic load, psychosocial stress, and socioeconomic position all have the potential to modify the response to environmental exposures. Moreover, many of these modifiers covary with the exposure, leading to much higher risks in some subgroups. These are not theoretical concerns; rather, all these patterns have already been demonstrated in studies of the effects of lead and air pollution. However, recent regulatory impact assessments for these exposures have generally not incorporated these findings. Therefore, differential risk and vulnerability is a critically important but neglected area within risk assessment, and should be incorporated in the future.
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Affiliation(s)
- Joel Schwartz
- Department of Environmental Health and Epidemiology, Harvard School of Public Health, and Harvard Center for Risk Analysis, Harvard University, Boston, MA 02215, USA.
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New and old mechanisms associated with hypertension in the elderly. Int J Hypertens 2011; 2012:150107. [PMID: 22046504 PMCID: PMC3199182 DOI: 10.1155/2012/150107] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Accepted: 08/19/2011] [Indexed: 12/23/2022] Open
Abstract
Hypertension is a widely prevalent and important risk factor for cardiovascular diseases that increase with aging. The hallmark of hypertension in the elderly is increased vascular dysfunction. However, the molecular mechanisms by which increased blood pressure leads to vascular injury and impaired endothelial function are not well defined. In the present paper, we will analyze several mechanisms described in the scientific literature involved in hypertension in the elderly as endothelial dysfunction, increased oxygen delivery to tissues, inflammation, cellular apoptosis, and increased concentration of active metabolites. Also, we will focus on new molecular mechanisms involved in hypertension such as telomeres shortening, progenitor cells, circulating microparticles, and epigenetic factors that have appeared as possible causes of hypertension in the elderly. These molecular mechanisms may elucidate different origin for hypertension in the elderly and provide us with new targets for hypertension treatment.
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Zhu H, Guo D, Li K, Pedersen-White J, Stallmann-Jorgensen IS, Huang Y, Parikh S, Liu K, Dong Y. Increased telomerase activity and vitamin D supplementation in overweight African Americans. Int J Obes (Lond) 2011; 36:805-9. [PMID: 21986705 DOI: 10.1038/ijo.2011.197] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE We aimed to investigate whether vitamin D supplementation modulates peripheral blood mononuclear cell (PBMC) telomerase activity in overweight African Americans. DESIGN A double blind, randomized and placebo-controlled clinical trial (#NCT01141192) was recently conducted. SUBJECTS AND METHODS African-American adults were randomly assigned to either the placebo, or the vitamin D group (60,000 IU per month (equivalent to ~2000 IU per day) oral vitamin D3 supplementation). Fresh PBMCs were collected from 37 subjects (18 in the placebo group and 19 in the vitamin D group), both at baseline and 16 weeks. PBMC telomerase activity was measured by the telomeric repeat amplification protocol. RESULTS Serum 25 hydroxyvitamin D levels increased from 40.7±15.7 at baseline to 48.1±17.5 nmol l(-1) at posttest (P=0.004) in the placebo group, and from 35.4±11.3 at baseline to 103.7±31.5 nmol l(-1) at posttests (P<0.0001) in the vitamin D group. In the vitamin D group, PBMC telomerase activity increased by 19.2% from baseline (1.56±0.29 absorbance reading unit (AU)) to posttest (1.86±0.42 AU, P<0.0001). The significance persisted after controlling for age, sex and body mass index (P=0.039). PBMC telomerase activity in the placebo group did not change from baseline (1.43±0.26 AU) to posttest (1.46±0.27 AU, P=0.157). CONCLUSION Vitamin D supplementation significantly increased PBMC telomerase activity in overweight African Americans. Our data suggest that vitamin D may improve telomere maintenance and prevent cell senescence and counteract obesity-induced acceleration of cellular aging.
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Affiliation(s)
- H Zhu
- Georgia Prevention Institute, Department of Pediatrics, Georgia Health Sciences University, Augusta, GA 30912, USA.
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Dimitroulis D, Katsargyris A, Klonaris C, Avgerinos ED, Fragou-Plemenou M, Kouraklis G, Liapis CD. Telomerase expression on aortic wall endothelial cells is attenuated in abdominal aortic aneurysms compared to healthy nonaneurysmal aortas. J Vasc Surg 2011; 54:1778-83. [PMID: 21917401 DOI: 10.1016/j.jvs.2011.06.079] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2011] [Revised: 06/21/2011] [Accepted: 06/21/2011] [Indexed: 01/25/2023]
Abstract
OBJECTIVE Linear chromosomes carry specific DNA structures at their ends called telomeres. The latter shorten with each successive cell division making their length a marker of cell age. Telomerase prevents such telomere attrition by adding back telomeric repeats at the telomere ends, thus playing an important role in cell aging. On the other hand, an abdominal aortic aneurysm (AAA) represents an age-related degenerative disorder. The aim of the present study was to investigate a potential correlation of telomerase expression with AAA formation. METHODS Aortic wall tissue samples were collected from 49 patients (mean age, 63.8 ± 4.4 years) with AAAs during open elective repair and from 24 deceased organ donors as controls (mean age, 60.5 ± 3.9 years). Telomerase expression on endothelial cells was detected by immunohistochemistry. Associations of telomerase positivity with AAAs and epidemiologic and clinical variables were investigated. RESULTS Telomerase expression was significantly decreased in patients with AAAs (11 of 49; 22.4%) compared to controls (19 of 24; 79.2%; P < .001). This association persisted after adjustment for age, gender, coronary artery disease (CAD), hypercholesterolemia, hypertension and smoking (odds ratio, 0.47; 95% confidence interval, 0.14-0.58; P < .01.). CONCLUSION Patients with AAAs have attenuated telomerase endothelial expression compared to controls, implying a protective role of telomerase against AAA formation. Further investigation of pathways involved in vascular aging may contribute to elucidation of AAA pathogenetic mechanisms.
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Affiliation(s)
- Dimitrios Dimitroulis
- Athens University Medical School, 2nd Surgical Department, Vascular Division, Laikon University General Hospital, Athens, Greece
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Fernández-Real JM, Moreno-Navarrete JM, Ortega F, Ricart W. Decreased serum creatinine concentration is associated with short telomeres of adipose tissue cells. Obesity (Silver Spring) 2011; 19:1511-4. [PMID: 21350437 DOI: 10.1038/oby.2011.31] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Decreased serum creatinine concentration has been recently described to constitute a new risk factor of type 2 diabetes. Increased free radicals have been consistently associated with decreased serum creatinine and with cellular senescence. Telomere length is considered as a biological marker for senescence. We aimed to study the association of telomere length with serum creatinine. Telomere length of subcutaneous adipose tissue cells was measured in a sample of obese and nonobese subjects (n = 49). Telomere length of subcutaneous adipose tissue cells was positively associated with serum creatinine (r = 0.40, P = 0.004), i.e., the lower the telomere length, the lower the serum creatinine, but not with glomerular filtration rate (GFR). In addition, telomere length was negatively associated with BMI (r = -0.45, P = 0.001) and systolic blood pressure (r = -0.41, P = 0.003). In a multiple linear regression analysis, BMI (P = 0.005), systolic blood pressure (P = 0.01) and telomere length (P = 0.03) independently contributed to 37% of serum creatinine variance after controlling for sex and age. In conclusion, the association of serum creatinine with a marker of cellular senescence suggests an underlying mechanism influencing both decreased serum creatinine and increased risk of type 2 diabetes.
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Affiliation(s)
- J M Fernández-Real
- Department of Diabetes, Endocrinology and Nutrition, Institut d'Investigació Biomédica de Girona, CIBERobn Fisiopatología de la Obesidad y Nutrición CB06/03/010, Girona, Spain.
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Abstract
Aging is a biological process that affects most cells, organisms and species. Human aging is associated with increased susceptibility to a variety of chronic diseases, including cardiovascular disease, Type 2 diabetes, neurological diseases and cancer. Despite the remarkable progress made during the last two decades, our understanding of the biology of aging remains incomplete. Telomere biology has recently emerged as an important player in the aging and disease process.
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