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Martinez D, Lavebratt C, Millischer V, de Jesus R. de Paula V, Pires T, Michelon L, Camilo C, Esteban N, Pereira A, Schalling M, Vallada H. Shorter telomere length and suicidal ideation in familial bipolar disorder. PLoS One 2022; 17:e0275999. [PMID: 36469522 PMCID: PMC9721487 DOI: 10.1371/journal.pone.0275999] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 09/27/2022] [Indexed: 12/12/2022] Open
Abstract
Bipolar Disorder (BD) has recently been related to a process of accelerated aging, with shortened leukocyte telomere length (LTL) in this population. It has also been observed that the suicide rate in BD patients is higher than in the general population, and more recently the telomere length variation has been described as shorter in suicide completers compared with control subjects. Objectives The aim of the present study was to investigate if there is an association between LTL and BD in families where two or more members have BD including clinical symptomatology variables, along with suicide behavior. Methods Telomere length and single copy gene ratio (T/S ratio) was measured using quantitative polymerase chain reaction in a sample of 143 relatives from 22 families, of which 60 had BD. The statistical analysis was performed with a polygenic mixed model. Results LTL was associated with suicidal ideation (p = 0.02) as that there is an interaction between suicidal ideation and course of the disorder (p = 0.02). The estimated heritability for LTL in these families was 0.68. In addition, covariates that relate to severity of disease, i.e. suicidal ideation and course of the disorder, showed an association with shorter LTL in BD patients. No difference in LTL between BD patients and healthy relatives was observed. Conclusion LTL are shorter in subjects with familial BD suggesting that stress related sub-phenotypes possibly accelerate the process of cellular aging and correlate with disease severity and suicidal ideation.
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Affiliation(s)
- Daniela Martinez
- Departamento & Instituto de Psiquiatria, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
- Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
- Laboratório de Genética e Cardiologia Molecular, Instituto do Coração, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Catharina Lavebratt
- Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Vincent Millischer
- Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Vanessa de Jesus R. de Paula
- Departamento & Instituto de Psiquiatria, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Thiago Pires
- Laboratório de Genética e Cardiologia Molecular, Instituto do Coração, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Leandro Michelon
- Departamento & Instituto de Psiquiatria, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Caroline Camilo
- Departamento & Instituto de Psiquiatria, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Nubia Esteban
- Laboratório de Genética e Cardiologia Molecular, Instituto do Coração, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Alexandre Pereira
- Laboratório de Genética e Cardiologia Molecular, Instituto do Coração, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Martin Schalling
- Departamento & Instituto de Psiquiatria, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
- Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Homero Vallada
- Departamento & Instituto de Psiquiatria, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
- Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- * E-mail:
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Al-Daghri NM, Sabico S, Ansari MG, Abdi S, Tripathi G, Chrousos GP, McTernan PG. Endotoxemia, vitamin D and premature biological ageing in Arab adults with different metabolic states. Saudi J Biol Sci 2022; 29:103276. [PMID: 35431594 PMCID: PMC9011112 DOI: 10.1016/j.sjbs.2022.03.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 02/15/2022] [Accepted: 03/19/2022] [Indexed: 11/30/2022] Open
Abstract
There are limited studies on the association of endotoxin, a potent mediator of gut-derived inflammation and telomere length (TL). We investigated (1) the influence of adiposity on endotoxin and TL amongst Saudi adults according to type 2 diabetes mellitus (T2DM) status and (2) the influence vitamin D may have on TL attrition. Anthropometric data and fasting blood samples were taken from 775 Saudi adults visiting different primary care centers in Riyadh [387 T2DM and 388 non-T2DM]. TL, derived from peripheral blood mononuclear cells, was analyzed by Quantitative real-time polymerase chain reaction and circulating endotoxin levels by Limulus Amebocyte Lysate assay. Subjects were stratified based on obesity and T2DM status. A significant lower TL was observed in the non-obese T2DM group as compared with their non-obese, non-T2DM counterparts (p = 0.002). Significant inverse associations between TL, endotoxin and endotoxin activity were observed in the cohort with obesity. Regression analysis showed that endotoxin was a significant predictor for TL in all subjects and even after stratification according to subgroups; with variances perceived in circulating TL stronger among non-T2DM obese (10%; p = 0.003) than non-T2DM non-obese (12%; p = 0.007). Also, in the non-T2DM group, TL and HDL-cholesterol predicted 29% of the variances perceived in 25(OH)D (p < 0.001). Taken together these findings show that circulating endotoxin and 25(OH)D are associated with premature biological ageing influenced by adiposity and metabolic state; suggesting future intervention studies to manipulate gut microbiome and or vitamin D levels may offer ways to mitigate premature TL attrition.
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Affiliation(s)
- Nasser M. Al-Daghri
- Biochemistry Department, Chair for Biomarkers of Chronic Diseases, King Saud University, Riyadh 11451, Saudi Arabia
- Corresponding authors.
| | - Shaun Sabico
- Biochemistry Department, Chair for Biomarkers of Chronic Diseases, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohammed G.A. Ansari
- Biochemistry Department, Chair for Biomarkers of Chronic Diseases, King Saud University, Riyadh 11451, Saudi Arabia
| | - Saba Abdi
- Biochemistry Department, Chair for Biomarkers of Chronic Diseases, King Saud University, Riyadh 11451, Saudi Arabia
| | - Gyanendra Tripathi
- Human Sciences Research Centre, School of Human Sciences, University of Derby, Derby, DE122 1GB, UK
| | - George P. Chrousos
- University Research Institute of Maternal and Child Health and Precision Medicine, UNESCO Chair on Adolescent Health Care, National and Kapodistrian University of Athens, 11527 Athens, Greece, Greece
| | - Philip G. McTernan
- Department of Biosciences, School of Science and Technology, Nottingham Trent University, Nottingham, NG1 8NS, UK
- Corresponding authors.
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Telomere length and telomere repeat-binding protein in children with sickle cell disease. Pediatr Res 2022; 91:539-544. [PMID: 33824452 PMCID: PMC8904250 DOI: 10.1038/s41390-021-01495-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 03/08/2021] [Accepted: 03/11/2021] [Indexed: 02/01/2023]
Abstract
BACKGROUND This study aimed to assess the telomere length and plasma telomere repeat-binding factor 2 (TRF2) levels in addition to other inflammatory markers in children with sickle cell disease (SCD). METHODS We enrolled 106 children (90 SCD and 26 controls) aged 1-15 years from the Hematology unit of King Fahad Medical City (KFMC), Saudi Arabia. Genomic DNA extracted from blood and leukocyte TL was determined using quantitative reverse transcription PCR, whereas TRF2, C-reactive protein, interleukin-6, and DNA oxidative damage were determined by using respective commercially available assays. RESULTS Leukocyte TL was inversely correlated with age in the SCD patients (r = -0.24, P = 0.02) and the controls (r = -0.68, P < 0.0001). In addition, SCD patients had significantly shorter TL (7.74 ± 0.81 kb) (P = 0.003) than controls (8.28 ± 0.73 kb). In contrast, no significant difference in TL among the SCD genotypes (HbSS and HbSβ0) has been observed. A modest, positive correlation was seen between TL and reticulocyte % (r = 0.21; P = 0.06). There were no significant differences in the TL and TRF2 concentrations between subjects with HbSS and HbSβ0 genotypes. CONCLUSIONS Short leukocyte TL was significantly associated with SCD. An inverse association was observed between TL and hemoglobin. Hydroxyurea treatment revealed no impact on TL. IMPACT This study explored the TL and plasma TRF2 in Saudi children with SCD. This is the first documentation that SCD children have shorter TL than their healthy counterparts, and no association between TL and TRF2 has been observed. Hydroxyurea treatment showed no impact on TL in children with SCD. This study is the first of its kind in children with SCD. It will pave the way for another study with a larger sample size in a diverse population to scrutinize these findings better.
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Zhao G, Guo D, Li L, Yang C, Dong J. The Association between Dietary Magnesium Intake and Telomere Length in Adults with Hypertension. J Nutr Health Aging 2022; 26:1010-1015. [PMID: 36437769 DOI: 10.1007/s12603-022-1856-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Dietary micronutrients are significantly associated with telomere length, as shown in multiple studies. However, no study has investigated the association between magnesium intake and telomere length in adults with hypertension. METHODS Participants were included from the National Health and Nutrition Examination Survey (NHANES) in 1999-2000 and 2001-2002. Dietary magnesium intake was assessed using the 24 - hour recall method and the telomere length of leukocytes was measured using polymerase chain reaction (PCR). A multivariate regression model was then used to assess the association between dietary magnesium intake and telomere length in adults with hypertension. RESULTS Our final analysis included 2199 hypertensive adults (46.79% males) with a mean dietary magnesium intake of 254.82±133.47 mg/day. Linear regression, adjusted for race, sex, age, smoking, uric acid, and other variables, showed that every 1 mg increase in dietary magnesium intake was associated with a 0.20 (95% CI: 0.01, 0.39, p = 0.043) longer telomere length in all participants. In the ≥45 years age group, there was a statistically significant association between the telomere length and dietary magnesium (95% CI: 0.16, 0.63, p <0.001). CONCLUSIONS This study suggests that increased magnesium intake is associated with a longer telomere length in hypertensive adults, especially in those ≥45 years of age. However, further research is needed to determine a causal relationship.
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Affiliation(s)
- G Zhao
- Jianzeng Dong, MD, Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, China,
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Heritability of telomere length across three generations of Korean families. Pediatr Res 2020; 87:1060-1065. [PMID: 31783399 PMCID: PMC7199797 DOI: 10.1038/s41390-019-0699-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/19/2019] [Accepted: 11/02/2019] [Indexed: 11/08/2022]
Abstract
BACKGROUND Leukocyte telomere length (LTL), an indicator of aging, is influenced by both genetic and environmental factors; however, its heritability is unknown. We determined heritability and inheritance patterns of telomere length across three generations of families. METHODS We analyzed 287 individuals from three generations of 41 Korean families, including newborns, parents, and grandparents. LTL (the ratio of telomere repeat copy number to single gene copy number) was measured by quantitative real-time PCR. We estimated heritability using the SOLAR software maximum-likelihood variance component methods and a pedigree dataset. With adjustment for age and length of marriage, Pearson's partial correlation was performed for spousal pairs. RESULTS Heritability of LTL was high in all participants (h2 = 0.64). There were no significant differences in correlation coefficients of telomere length between paternal and maternal lines. There was a positive LTL correlation in grandfather-grandmother pairs (r = 0.25, p = 0.03) but not in father-mother pairs. After adjusting for age and length of marriage, the relationship between telomere lengths in grandfathers and grandmothers disappeared. There were inverse correlations between spousal rank differences of telomere length and length of marriage. CONCLUSIONS LTL is highly heritable without a sex-specific inheritance pattern and may be influenced by a shared environment.
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Dugdale HL, Richardson DS. Heritability of telomere variation: it is all about the environment! Philos Trans R Soc Lond B Biol Sci 2019; 373:rstb.2016.0450. [PMID: 29335377 PMCID: PMC5784070 DOI: 10.1098/rstb.2016.0450] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2017] [Indexed: 01/07/2023] Open
Abstract
Individual differences in telomere length have been linked to survival and senescence. Understanding the heritability of telomere length can provide important insight into individual differences and facilitate our understanding of the evolution of telomeres. However, to gain accurate and meaningful estimates of telomere heritability it is vital that the impact of the environment, and how this may vary, is understood and accounted for. The aim of this review is to raise awareness of this important, but much under-appreciated point. We outline the factors known to impact telomere length and discuss the fact that telomere length is a trait that changes with age. We highlight statistical methods that can separate genetic from environmental effects and control for confounding variables. We then review how well previous studies in vertebrate populations including humans have taken these factors into account. We argue that studies to date either use methodological techniques that confound environmental and genetic effects, or use appropriate methods but lack sufficient power to fully separate these components. We discuss potential solutions. We conclude that we need larger studies, which also span longer time periods, to account for changing environmental effects, if we are to determine meaningful estimates of the genetic component of telomere length. This article is part of the theme issue ‘Understanding diversity in telomere dynamics'.
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Affiliation(s)
- Hannah L Dugdale
- Faculty of Biological Sciences, School of Biology, University of Leeds, Leeds LS2 9JT, UK
| | - David S Richardson
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, Norfolk NR4 7TJ, UK
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Awada Z, Sleiman F, Mailhac A, Mouneimne Y, Tamim H, Zgheib NK. BPA exposure is associated with non-monotonic alteration in ESR1 promoter methylation in peripheral blood of men and shorter relative telomere length in peripheral blood of women. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2019; 29:118-128. [PMID: 29643374 DOI: 10.1038/s41370-018-0030-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 12/01/2017] [Accepted: 12/29/2017] [Indexed: 05/20/2023]
Abstract
The aim of this study was to evaluate the potential association of urinary Bisphenol A (BPA) levels with estrogen receptor alpha (ESR1) promoter % methylation and relative telomere length in a sample of 482 participants. Urinary BPA concentration was measured using organic phase extraction followed by high performance liquid chromatography mass spectroscopy. Peripheral blood ESR1 promoter % methylation and relative telomere length were measured using direct bisulfite sequencing and real-time polymerase chain reaction, respectively. The mean ± SD urinary BPA concentration adjusted for urinary creatinine was 2.90 ± 4.81 (μg/g creatinine) with a median of 1.86 μg/g creatinine (min-max: <LOD -69.85). There was a potentially non-monotonic relationship between adjusted urinary BPA concentrations and ESR1 promoter % methylation in men. As a matter of fact, for the lowest tertile of ESR1 promoter % methylation, the OR and 95% CI of the middle and highest tertiles of urinary adjusted BPA were 2.54 (1.01-6.39) and 1.64 (0.55-4.86) when compared to the lowest BPA tertile, respectively. After adjustment for potential confounders, similar results remained in men and appeared in the whole cohort. As for relative telomere length, there was a significant trend whereby higher adjusted urinary BPA concentrations were significantly associated with shorter relative telomere length in females. For instance, for the shortest relative telomere length tertile, the OR and 95% CI of the middle and highest tertiles of urinary adjusted BPA were 2.91 (1.38-6.16) and 3.19 (1.57-6.49) when compared to the lowest BPA tertile, respectively. This trend remained significant after adjustment for potential confounders.
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Affiliation(s)
- Z Awada
- Department of Pharmacology and Toxicology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - F Sleiman
- Department of Pharmacology and Toxicology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - A Mailhac
- Clinical Research Institute, Faculty of Medicine, American University of Beirut Medical Center, Beirut, Lebanon
| | - Y Mouneimne
- Kamal A. Shair Central Research Science Laboratory, Faculty of Arts and Sciences, American University of Beirut, Beirut, Lebanon
| | - H Tamim
- Clinical Research Institute, Faculty of Medicine, American University of Beirut Medical Center, Beirut, Lebanon.
| | - N K Zgheib
- Department of Pharmacology and Toxicology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon.
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Zgheib NK, Sleiman F, Nasreddine L, Nasrallah M, Nakhoul N, Isma'eel H, Tamim H. Short Telomere Length is Associated with Aging, Central Obesity, Poor Sleep and Hypertension in Lebanese Individuals. Aging Dis 2018; 9:77-89. [PMID: 29392083 PMCID: PMC5772860 DOI: 10.14336/ad.2017.0310] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 03/10/2017] [Indexed: 12/20/2022] Open
Abstract
In Lebanon, data stemming from national cross-sectional surveys indicated significant increasing trends in the prevalence of cardiovascular diseases and associated behavioral and age-related risk factors. To our knowledge, no data are available on relative telomere length (RTL) as a potential biomarker for age-related diseases in a Lebanese population. The aim of this study was to evaluate whether there is an association between RTL and demographic characteristics, lifestyle habits and diseases in the Lebanese. This was a cross-sectional study of 497 Lebanese subjects. Peripheral blood RTL was measured by amplifying telomere and single copy gene using real-time PCR. Mean ± SD RTL was 1.42 ± 0.83, and it was categorized into 3 tertiles. Older age (P=0.002) and wider waist circumference (WC) (P=0.001) were statistically significantly associated with shorter RTL. Multinomial logistic regression showed that subjects who had some level of sleeping difficulty had a statistically significantly shorter RTL when compared to those with no sleeping difficulties at all [OR (95% CI): 2.01 (1.11-3.62) in the first RTL tertile]. Importantly, statistically significantly shorter RTL was found with every additional 10 cm of WC [OR (95% CI): 1.30 (1.11-1.52) for first RTL tertile]. In addition, and after performing the multivariate logistic regression and adjusting for “predictors” of RTL, the odds of having hypertension or being treated for hypertension were higher in patients who had shorter RTL: OR (95% CI): 2.45 (1.36-4.44) and 2.28 (1.22-4.26) in the first RTL tertiles respectively with a similar trend, though not statistically significant, in the second RTL tertiles. This is the first study in Lebanon to show an association between age, central obesity, poor sleep and hypertension and RTL. It is hoped that telomere length measurement be potentially used as a biomarker for biological age and age-related diseases and progression in the Lebanese.
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Affiliation(s)
- Nathalie K Zgheib
- 1Department of Pharmacology & Toxicology, Faculty of Medicine, American University of Beirut, Lebanon
| | - Fatima Sleiman
- 1Department of Pharmacology & Toxicology, Faculty of Medicine, American University of Beirut, Lebanon
| | - Lara Nasreddine
- 2Department of Nutrition & Food Sciences, Faculty of Agriculture and Food Sciences, American University of Beirut, Lebanon
| | - Mona Nasrallah
- 3Department of Internal Medicine, Faculty of Medicine, American University of Beirut Medical Center, Lebanon
| | - Nancy Nakhoul
- 3Department of Internal Medicine, Faculty of Medicine, American University of Beirut Medical Center, Lebanon
| | - Hussain Isma'eel
- 3Department of Internal Medicine, Faculty of Medicine, American University of Beirut Medical Center, Lebanon
| | - Hani Tamim
- 3Department of Internal Medicine, Faculty of Medicine, American University of Beirut Medical Center, Lebanon.,4Clinical Research Institute, Faculty of Medicine, American University of Beirut Medical Center, Lebanon
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Mundstock E, Sarria EE, Zatti H, Mattos Louzada F, Kich Grun L, Herbert Jones M, Guma FTCR, Mazzola In Memoriam J, Epifanio M, Stein RT, Barbé-Tuana FM, Mattiello R. Effect of obesity on telomere length: Systematic review and meta-analysis. Obesity (Silver Spring) 2015; 23:2165-74. [PMID: 26407932 DOI: 10.1002/oby.21183] [Citation(s) in RCA: 141] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 05/08/2015] [Accepted: 05/11/2015] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The main objective of this systematic review is to assess the effects of obesity on telomere length. METHODS The following databases were searched: MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library), LILACS, SPORTdiscus, and Web of Science from inception to August 2014. The search was performed using the following combinations of terms: telomere AND "overweight" OR "obesity" OR "adiposity," without language restriction. RESULTS Sixty-three original studies were included in this systematic review, comprising 119,439 subjects. Thirty-nine studies showed either weak or moderate correlation between obesity and telomere length; however, they showed an important heterogeneity. CONCLUSIONS There is a tendency toward demonstrating negative correlation between obesity and telomere length. The selected studies showed weak to moderate correlation for the main search, and there was an important heterogeneity. For this reason, the causal relationship of obesity and telomere length remains open. Additional controlled longitudinal studies are needed to investigate this issue.
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Affiliation(s)
- Eduardo Mundstock
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS). Departament: Centro Infant, Biomedical Research Institute, Porto Alegre, Brazil
| | - Edgar E Sarria
- School of Medicine, Department of Biology and Pharmacy, Universidade De Santa Cruz Do Sul (UNISC), Santa Cruz, Brazil
| | - Helen Zatti
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS). Departament: Centro Infant, Biomedical Research Institute, Porto Alegre, Brazil
| | - Fernanda Mattos Louzada
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS). Departament: Centro Infant, Biomedical Research Institute, Porto Alegre, Brazil
| | - Lucas Kich Grun
- Departmento De Bioquímica, ICBS, Universidade Federal Do Rio Grande Do Sul (UFRGS), Porto Alegre, Brazil
| | - Marcus Herbert Jones
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS). Departament: Centro Infant, Biomedical Research Institute, Porto Alegre, Brazil
| | - Fátima T C R Guma
- Departmento De Bioquímica, ICBS, Universidade Federal Do Rio Grande Do Sul (UFRGS), Porto Alegre, Brazil
| | - João Mazzola In Memoriam
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS). Departament: Centro Infant, Biomedical Research Institute, Porto Alegre, Brazil
| | - Matias Epifanio
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS). Departament: Centro Infant, Biomedical Research Institute, Porto Alegre, Brazil
| | - Renato T Stein
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS). Departament: Centro Infant, Biomedical Research Institute, Porto Alegre, Brazil
| | - Florencia M Barbé-Tuana
- Departmento De Bioquímica, ICBS, Universidade Federal Do Rio Grande Do Sul (UFRGS), Porto Alegre, Brazil
| | - Rita Mattiello
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS). Departament: Centro Infant, Biomedical Research Institute, Porto Alegre, Brazil
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Jenkins AJ, Joglekar MV, Hardikar AA, Keech AC, O'Neal DN, Januszewski AS. Biomarkers in Diabetic Retinopathy. Rev Diabet Stud 2015; 12:159-95. [PMID: 26676667 DOI: 10.1900/rds.2015.12.159] [Citation(s) in RCA: 164] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
There is a global diabetes epidemic correlating with an increase in obesity. This coincidence may lead to a rise in the prevalence of type 2 diabetes. There is also an as yet unexplained increase in the incidence of type 1 diabetes, which is not related to adiposity. Whilst improved diabetes care has substantially improved diabetes outcomes, the disease remains a common cause of working age adult-onset blindness. Diabetic retinopathy is the most frequently occurring complication of diabetes; it is greatly feared by many diabetes patients. There are multiple risk factors and markers for the onset and progression of diabetic retinopathy, yet residual risk remains. Screening for diabetic retinopathy is recommended to facilitate early detection and treatment. Common biomarkers of diabetic retinopathy and its risk in clinical practice today relate to the visualization of the retinal vasculature and measures of glycemia, lipids, blood pressure, body weight, smoking, and pregnancy status. Greater knowledge of novel biomarkers and mediators of diabetic retinopathy, such as those related to inflammation and angiogenesis, has contributed to the development of additional therapeutics, in particular for late-stage retinopathy, including intra-ocular corticosteroids and intravitreal vascular endothelial growth factor inhibitors ('anti-VEGFs') agents. Unfortunately, in spite of a range of treatments (including laser photocoagulation, intraocular steroids, and anti-VEGF agents, and more recently oral fenofibrate, a PPAR-alpha agonist lipid-lowering drug), many patients with diabetic retinopathy do not respond well to current therapeutics. Therefore, more effective treatments for diabetic retinopathy are necessary. New analytical techniques, in particular those related to molecular markers, are accelerating progress in diabetic retinopathy research. Given the increasing incidence and prevalence of diabetes, and the limited capacity of healthcare systems to screen and treat diabetic retinopathy, there is need to reliably identify and triage people with diabetes. Biomarkers may facilitate a better understanding of diabetic retinopathy, and contribute to the development of novel treatments and new clinical strategies to prevent vision loss in people with diabetes. This article reviews key aspects related to biomarker research, and focuses on some specific biomarkers relevant to diabetic retinopathy.
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Affiliation(s)
- Alicia J Jenkins
- NHMRC Clinical Trials Centre, University of Sydney, Camperdown, Sydney, Australia
| | - Mugdha V Joglekar
- NHMRC Clinical Trials Centre, University of Sydney, Camperdown, Sydney, Australia
| | | | - Anthony C Keech
- NHMRC Clinical Trials Centre, University of Sydney, Camperdown, Sydney, Australia
| | - David N O'Neal
- NHMRC Clinical Trials Centre, University of Sydney, Camperdown, Sydney, Australia
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Honig LS, Kang MS, Cheng R, Eckfeldt JH, Thyagarajan B, Leiendecker-Foster C, Province MA, Sanders JL, Perls T, Christensen K, Lee JH, Mayeux R, Schupf N. Heritability of telomere length in a study of long-lived families. Neurobiol Aging 2015; 36:2785-90. [PMID: 26239175 DOI: 10.1016/j.neurobiolaging.2015.06.017] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 06/08/2015] [Accepted: 06/10/2015] [Indexed: 11/30/2022]
Abstract
Chromosomal telomere length shortens with repeated cell divisions. Human leukocyte DNA telomere length (LTL) has been shown to shorten during aging. LTL shortening has correlated with decreased longevity, dementia, and other age-associated processes. Because LTL varies widely between individuals in a given age group, it has been hypothesized to be a marker of biological aging. However, the principal basis for the variation of human LTL has not been established, although various studies have reported heritability. Here, we use a family-based study of longevity to study heritability of LTL in 3037 individuals. We show that LTL is shorter in older individuals, and in males, and has a high heritability (overall h(2) = 0.54). In the offspring generation, who are in middle-life, we find an ordinal relationship: persons more-closely-related to elderly probands have longer LTL than persons less-closely-related, who nonetheless have longer LTL than unrelated spouses of the offspring generation. These results support a prominent genetic underpinning of LTL. Elucidation of such genetic bases may provide avenues for intervening in the aging process.
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Affiliation(s)
- Lawrence S Honig
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Medical Center, New York, NY, USA; Gertrude H. Sergievsky Center, Columbia University Medical Center, New York, NY, USA; Department of Neurology, Columbia University Medical Center, New York, NY, USA.
| | - Min Suk Kang
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Medical Center, New York, NY, USA
| | - Rong Cheng
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Medical Center, New York, NY, USA
| | - John H Eckfeldt
- Department Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | - Bharat Thyagarajan
- Department Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | | | - Michael A Province
- Division of Statistical Genomics, Department of Genetics, Washington University School of Medicine, St. Louis, MO, USA
| | - Jason L Sanders
- Department of Epidemiology, Center for Aging and Population Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Thomas Perls
- Section of Geriatrics, Department of Medicine, Boston Medical Center, Boston, MA, USA
| | - Kaare Christensen
- The Danish Aging Research Center, University of Southern Denmark, Odense, Denmark
| | - Joseph H Lee
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Medical Center, New York, NY, USA; Gertrude H. Sergievsky Center, Columbia University Medical Center, New York, NY, USA; Department of Epidemiology, Columbia University Medical Center, New York, NY, USA
| | - Richard Mayeux
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Medical Center, New York, NY, USA; Gertrude H. Sergievsky Center, Columbia University Medical Center, New York, NY, USA; Department of Neurology, Columbia University Medical Center, New York, NY, USA; Department of Epidemiology, Columbia University Medical Center, New York, NY, USA; Department of Psychiatry, Columbia University Medical Center, New York, NY, USA
| | - Nicole Schupf
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Medical Center, New York, NY, USA; Gertrude H. Sergievsky Center, Columbia University Medical Center, New York, NY, USA; Department of Psychiatry, Columbia University Medical Center, New York, NY, USA
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12
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Reichert S, Rojas ER, Zahn S, Robin JP, Criscuolo F, Massemin S. Maternal telomere length inheritance in the king penguin. Heredity (Edinb) 2014; 114:10-6. [PMID: 25052413 DOI: 10.1038/hdy.2014.60] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 04/24/2014] [Accepted: 05/07/2014] [Indexed: 01/07/2023] Open
Abstract
Telomeres are emerging as a biomarker for ageing and survival, and are likely important in shaping life-history trade-offs. In particular, telomere length with which one starts in life has been linked to lifelong survival, suggesting that early telomere dynamics are somehow related to life-history trajectories. This result highlights the importance of determining the extent to which telomere length is inherited, as a crucial factor determining early life telomere length. Given the scarcity of species for which telomere length inheritance has been studied, it is pressing to assess the generality of telomere length inheritance patterns. Further, information on how this pattern changes over the course of growth in individuals living under natural conditions should provide some insight on the extent to which environmental constraints also shape telomere dynamics. To fill this gap partly, we followed telomere inheritance in a population of king penguins (Aptenodytes patagonicus). We tested for paternal and maternal influence on chick initial telomere length (10 days old after hatching), and how these relationships changed with chick age (at 70, 200 and 300 days old). Based on a correlative approach, offspring telomere length was positively associated with maternal telomere length early in life (at 10 days old). However, this relationship was not significant at older ages. These data suggest that telomere length in birds is maternally inherited. Nonetheless, the influence of environmental conditions during growth remained an important factor shaping telomere length, as the maternal link disappeared with chicks' age.
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Affiliation(s)
- S Reichert
- 1] Département Ecologie, Physiologie et Ethologie, Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Strasbourg, France [2] CNRS, UMR 7178, Strasbourg, France
| | - E R Rojas
- 1] Département Ecologie, Physiologie et Ethologie, Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Strasbourg, France [2] CNRS, UMR 7178, Strasbourg, France
| | - S Zahn
- 1] Département Ecologie, Physiologie et Ethologie, Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Strasbourg, France [2] CNRS, UMR 7178, Strasbourg, France
| | - J-P Robin
- 1] Département Ecologie, Physiologie et Ethologie, Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Strasbourg, France [2] CNRS, UMR 7178, Strasbourg, France
| | - F Criscuolo
- 1] Département Ecologie, Physiologie et Ethologie, Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Strasbourg, France [2] CNRS, UMR 7178, Strasbourg, France
| | - S Massemin
- 1] Département Ecologie, Physiologie et Ethologie, Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Strasbourg, France [2] CNRS, UMR 7178, Strasbourg, France
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13
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Eisenberg DTA. Inconsistent inheritance of telomere length (TL): is offspring TL more strongly correlated with maternal or paternal TL? Eur J Hum Genet 2013; 22:8-9. [PMID: 24022299 DOI: 10.1038/ejhg.2013.202] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Affiliation(s)
- Dan T A Eisenberg
- 1] Department of Anthropology, University of Washington, Seattle, WA, USA [2] Center for Studies in Demography and Ecology, University of Washington, Seattle, WA, USA
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