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Jin Z, Liu X, Guo H, Chen S, Zhu X, Pan S, Wu Y. Sex-specific modulating role of social support in the associations between oxidative stress, inflammation, and telomere length in older adults. J Behav Med 2024; 47:1040-1051. [PMID: 39179728 DOI: 10.1007/s10865-024-00515-0] [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: 02/11/2024] [Accepted: 08/08/2024] [Indexed: 08/26/2024]
Abstract
Telomere length, a biomarker of human aging, is related to adverse health outcomes. Growing evidence indicates that oxidative stress and inflammation contributes to telomere shortening, whereas social support may protect from telomere shortening. Despite sex differences in telomere length and social support, little is known about whether there are sex differences in the relationship between oxidative stress/inflammation and telomere length, and sex-specific moderating roles of social support in older adults. Using data from the National Health and Nutrition Examination Survey (NHANES) 1999-2002, this study assessed whether the associations between oxidative stress/inflammation and telomere length vary with sex and explored social support as a moderator in these associations among 2289 older adults. Oxidative stress was measured based on serum Gamma-glutamyl transferase (GGT), and inflammation was measured based on C-reactive protein (CRP). After adjusting for the covariates, GGT was significantly associated with telomere length in females only (β = - 0.037, 95% CI = - 0.070, - 0.005), while CRP was associated with telomere length in males only (β = - 0.019, 95% CI = - 0.035, - 0.002). Moreover, high social support mitigated the negative association between GGT and telomere length, which was more evident in females. Furthermore, social support moderated the association between CRP and telomere length in males aged 70 and above. Our findings indicated that biological mechanisms related to telomere length may vary with sex, while social support plays a sex-specific moderating role.
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Affiliation(s)
- Zhou Jin
- Zhejiang Provincial Clinical Research Center for Mental Disorders, Wenzhou Key Laboratory of Basic and Translational Research for Mental Disorders, School of Mental Health and The Affiliated Wenzhou Kangning Hospital, Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Xuejian Liu
- Zhejiang Provincial Clinical Research Center for Mental Disorders, Wenzhou Key Laboratory of Basic and Translational Research for Mental Disorders, School of Mental Health and The Affiliated Wenzhou Kangning Hospital, Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Haonan Guo
- Department of Sociology, Faculty of Social Science, University of Macau, Avenida da Universidade, Taipa, Macau, China
| | - Sixuan Chen
- Zhejiang Provincial Clinical Research Center for Mental Disorders, Wenzhou Key Laboratory of Basic and Translational Research for Mental Disorders, School of Mental Health and The Affiliated Wenzhou Kangning Hospital, Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Xianghe Zhu
- Zhejiang Provincial Clinical Research Center for Mental Disorders, Wenzhou Key Laboratory of Basic and Translational Research for Mental Disorders, School of Mental Health and The Affiliated Wenzhou Kangning Hospital, Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Sipei Pan
- Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yili Wu
- Zhejiang Provincial Clinical Research Center for Mental Disorders, Wenzhou Key Laboratory of Basic and Translational Research for Mental Disorders, School of Mental Health and The Affiliated Wenzhou Kangning Hospital, Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China.
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Yadav S, Bhagat S, Singh S, Maurya PK. Comparative Study of Antioxidant Activity of Dextran-Coated Iron Oxide, Gold, and Silver Nanoparticles Against Age-Induced Oxidative Stress in Erythrocytes. J Gerontol A Biol Sci Med Sci 2024; 79:glae197. [PMID: 39120090 DOI: 10.1093/gerona/glae197] [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: 06/05/2024] [Indexed: 08/10/2024] Open
Abstract
Erythrocytes undergo several changes during human aging and age-related diseases and, thus, have been studied as biomarkers of the aging process. The present study aimed to explore the antioxidant ability of metal and metal oxide nanoparticles (NPs) such as iron oxide (Fe3O4), gold (Au), and silver (Ag) to mitigate age-related oxidative stress in human erythrocytes. Metal and metal oxide NPs behave like antioxidative enzymes, directly influencing redox pathways and thus have better efficiency. Additionally, biopolymer coatings such as dextran enhance the biocompatibility of these NPs. Therefore, dextran-coated Fe3O4, Au, and Ag NPs were synthesized using wet chemical methods and were characterized. Their hemocompatibility and ability to protect erythrocytes from age-induced oxidative stress were investigated. The Fe3O4 and Au NPs were observed to protect erythrocytes from hydrogen peroxide and age-induced oxidative damage, including decreased antioxidant levels, reduced activity of antioxidative enzymes, and increased amounts of oxidative species. Pretreatment with NPs preserved the morphology and membrane integrity of the erythrocyte. However, Ag NPs induced oxidative stress in erythrocytes similar to hydrogen peroxide. Therefore, dextran-coated Fe3O4 and Au nanoparticles have the potential to be employed as antioxidant therapies against age-related oxidative stress.
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Affiliation(s)
- Somu Yadav
- Department of Biochemistry, Central University of Haryana, Mahendergarh, India
| | - Stuti Bhagat
- DBT-National Institute of Animal Biotechnology (NIAB), Hyderabad, Telangana, India
- DBT-Regional Centre for Biotechnology (RCB), Faridabad, Haryana, India
| | - Sanjay Singh
- DBT-National Institute of Animal Biotechnology (NIAB), Hyderabad, Telangana, India
- DBT-Regional Centre for Biotechnology (RCB), Faridabad, Haryana, India
| | - Pawan Kumar Maurya
- Department of Biochemistry, Central University of Haryana, Mahendergarh, India
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Yadav S, Bhagat S, Singh S, Maurya PK. Exploring the anti-aging effect of dextran and polyethylene glycol-coated cerium oxide nanoparticles in erythrocytes. Int J Biol Macromol 2024; 282:136700. [PMID: 39427790 DOI: 10.1016/j.ijbiomac.2024.136700] [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: 03/15/2024] [Revised: 10/01/2024] [Accepted: 10/17/2024] [Indexed: 10/22/2024]
Abstract
Oxidative stress generated during aging largely affects erythrocytes. Antioxidative therapies such as polyphenols and flavonoids face limitations like low bioavailability and reduced efficiency. Cerium oxide nanoparticles (CeONPs) can behave as antioxidative enzymes and thus have better efficiency. Additionally, biopolymer coatings such as polyethylene glycol and polysaccharides such as dextran enhance the biocompatibility of these NPs. Therefore, we synthesized and characterized bare, polyethylene glycol, dextran-coated CeONPs and examined their hemocompatibility and protective effect against age-induced oxidative stress in erythrocytes. Erythrocytes were obtained from 5 ml of fresh blood drawn from 52 healthy individuals aged 20-85 years with their consent. CeONPs were found to be protective against age-induced oxidative damage in erythrocytes such as reduced levels of antioxidants and increased levels of oxidative species. Pretreatment with NPs protected the morphology and membrane integrity of erythrocytes. Among the NPs investigated, dextran-coated CeONPs emerged as the most effective, providing a reassuring sign of progress in anti-aging research. Therefore, Dex-CeONPs can be used as potential antioxidant therapeutics against age-induced oxidative stress.
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Affiliation(s)
- Somu Yadav
- Department of Biochemistry, Central University of Haryana, Mahendergarh 123031, India; Department of Vocational Studies & Skill Development, Central University of Haryana, Mahendragarh, Haryana 123031, India
| | - Stuti Bhagat
- DBT-National Institute of Animal Biotechnology (NIAB), Opposite Journalist Colony, Near Gowlidoddy, Extended Q-City Road, Gachibowli, Hyderabad 500032, Telangana, India; DBT-Regional Centre for Biotechnology (RCB), Faridabad 121001, Haryana, India
| | - Sanjay Singh
- DBT-National Institute of Animal Biotechnology (NIAB), Opposite Journalist Colony, Near Gowlidoddy, Extended Q-City Road, Gachibowli, Hyderabad 500032, Telangana, India; DBT-Regional Centre for Biotechnology (RCB), Faridabad 121001, Haryana, India.
| | - Pawan Kumar Maurya
- Department of Biochemistry, Central University of Haryana, Mahendergarh 123031, India.
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Romero-Haro AA, Cantarero A, Alonso-Alvarez C. Early Oxidative Stress May Prevent a Red Ornament From Signaling Longevity. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART A, ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY 2024. [PMID: 39318264 DOI: 10.1002/jez.2868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 09/02/2024] [Accepted: 09/04/2024] [Indexed: 09/26/2024]
Abstract
Harsh early environmental conditions can exert delayed, long-lasting effects on phenotypes, including reproductive traits such as sexual signals. Indeed, adverse early conditions can accelerate development, increasing oxidative stress that may, in turn, impact adult sexual signals. Among signals, colorations produced by red ketocarotenoids seem to depend on mitochondrial functioning. Hence, they could reveal individual cell respiration efficiency. It has been hypothesized that these traits are unfalsifiable "index" signals of condition due to their deep connection to individual metabolism. Since mitochondrial dysfunction is frequently linked to aging, red ketocarotenoid-based ornaments could also be good signals of a critical fitness component: longevity. We tested this red color per longevity correlation in captive zebra finches. In addition, we experimentally decreased the synthesis of glutathione (a critical intracellular antioxidant) during the first days of the birds' life to resemble harsh early environmental conditions (e.g., undernutrition). Longevity was recorded until the death of the last bird (almost 9 years). Males, but not females, exhibiting a redder bill in early adulthood lived longer than males with paler bills, which agrees with some precedent studies. However, such bill redness-longevity connection was absent among males with inhibited glutathione synthesis. These findings may suggest that environmental factors can alter the reliability of red ketocarotenoid-based sexual signals, making them less unfalsifiable than believed.
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Affiliation(s)
- A A Romero-Haro
- Instituto de Investigación en Recursos Cinegéticos (IREC-CSIC-UCLM-JCCM), Ciudad Real, Spain
| | - A Cantarero
- Department of Physiology, Veterinary School, Complutense University of Madrid, Madrid, Spain
| | - C Alonso-Alvarez
- Evolutionary Ecology Department, National Museum of Natural Sciences-The Spanish National Research Council (MNCN-CSIC), Madrid, Spain
- Instituto Pirenaico de Ecología (IPE-CSIC), Jaca, Huesca, Spain
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Chen X, Liu B, Zhou J, Lin J, Jiang W, Xie R. Association between telomere length and erectile dysfunction: a cross-sectional study. Front Endocrinol (Lausanne) 2024; 15:1391013. [PMID: 39055058 PMCID: PMC11269092 DOI: 10.3389/fendo.2024.1391013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Accepted: 06/27/2024] [Indexed: 07/27/2024] Open
Abstract
Background Leukocyte telomere length (LTL) serves as a significant biomarker of aging. Erectile dysfunction (ED) is a commonly observed condition among middle-aged and older men. The objective of this study is to explore the potential association between LTL and ED. Methods We utilized data from the National Health and Nutrition Examination Survey (NHANES) to examine the association between LTL and ED. Weighted multivariate regression analyses were performed as the primary statistical method. Subgroup analyses were conducted to investigate specific population subsets, and restricted cubic spline (RCS) analyses were employed to assess the non-linear relationship between LTL and ED. Results The results of weighted multivariate regression analyses revealed a negative correlation between LTL and the risk of ED. Individuals with ED exhibited shorter LTL compared to those without ED. For each unit increase in LTL, there was a 54% reduction in the risk of ED (odds ratios[OR] 0.46, 95% confidence intervals[CI] 0.25-0.85). When LTL was considered as a categorical variable, the group with the longest LTL (Q5) had a 44% lower risk of ED compared to the group with the shortest LTL(Q1) (OR 0.56, 95% CI 0.39-0.81). A non-linear relationship was observed between TL and ED. Various sensitivity analyses were conducted to validate the stability of the results, and consistent findings were obtained. Conclusion The negative association between leukocyte LTL and ED suggests that delaying the shortening of LTL may decrease the risk of ED.
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Affiliation(s)
| | | | | | | | - Wei Jiang
- *Correspondence: Ruoyun Xie, ; Wei Jiang,
| | - Ruoyun Xie
- *Correspondence: Ruoyun Xie, ; Wei Jiang,
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Xu W, Yang T, Zhang J, Li H, Guo M. Rhodiola rosea: a review in the context of PPPM approach. EPMA J 2024; 15:233-259. [PMID: 38841616 PMCID: PMC11147995 DOI: 10.1007/s13167-024-00367-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 05/08/2024] [Indexed: 06/07/2024]
Abstract
A natural "medicine and food" plant, Rhodiola rosea (RR) is primarily made up of organic acids, phenolic compounds, sterols, glycosides, vitamins, lipids, proteins, amino acids, trace elements, and other physiologically active substances. In vitro, non-clinical and clinical studies confirmed that it exerts anti-inflammatory, antioxidant, and immune regulatory effects, balances the gut microbiota, and alleviates vascular circulatory disorders. RR can prolong life and has great application potential in preventing and treating suboptimal health, non-communicable diseases, and COVID-19. This narrative review discusses the effects of RR in preventing organ damage (such as the liver, lung, heart, brain, kidneys, intestines, and blood vessels) in non-communicable diseases from the perspective of predictive, preventive, and personalised medicine (PPPM/3PM). In conclusion, as an adaptogen, RR can provide personalised health strategies to improve the quality of life and overall health status.
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Affiliation(s)
- Wenqian Xu
- Henan University of Traditional Chinese Medicine, Zhengzhou, China
| | | | - Jinyuan Zhang
- The Third People’s Hospital of Henan Province, Zhengzhou, China
| | - Heguo Li
- Department of Spleen, Stomach, Liver and Gallbladder, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, China
| | - Min Guo
- Department of Spleen, Stomach, Liver and Gallbladder, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, China
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Hînganu MV, Cucu RP, Costan VV, Lozneanu L, Tamaș C, Calistru AE, Hristian L, Hînganu D. Aging of Superficial Musculoaponeurotic System of the Face-Novel Biomarkers and Micro-CT Relevance of Facial Anti-Gravity Support. Diagnostics (Basel) 2024; 14:1126. [PMID: 38893653 PMCID: PMC11172020 DOI: 10.3390/diagnostics14111126] [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: 04/17/2024] [Revised: 05/21/2024] [Accepted: 05/23/2024] [Indexed: 06/21/2024] Open
Abstract
The soft superficial tissues of the face are against gravity through an intricate network of ligaments and ligamentous attachments. The aim of this investigation is to delineate the relationship between the muscular, fibrous, and vascular components of the superficial musculoaponeurotic system of the face (SMAS) at the level of its periosteal fixation areas from advanced radiological and novel biomarkers' perspectives. These areas represent key points underlying skin aging and the longevity of restorative surgery results. Methods: This study was carried out on 37 surgical specimens, excised from patients admitted for surgery. On the excised specimens, we used special immunohistochemical techniques, such as markers for collagen type III, angiogenesis, vascular endothelium (I-CAM2) and muscle fibers (MYH2). We performed a micro-CT evaluation of these 37 specimens. Results: The results of this study showed different radiologic and IHC characteristics of the means of periosteal fixation of the SMAS. Evidence of morphohistological and radiological peculiarities of the retaining ligaments highlights new data for future functional studies of these structures. Our research must be continued with larger groups of subjects and through detailed methodological studies of vascular microperfusion and could represent an important new step in biotissue engineering and the customization of surgical techniques involving the sub-SMAS layers.
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Affiliation(s)
- Marius Valeriu Hînganu
- Department of Morpho-Functional Sciences I, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (M.V.H.); (L.L.); (D.H.)
| | - Ramona Paula Cucu
- Department of Oral and Maxillo-Facial Surgery, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania;
| | - Victor-Vlad Costan
- Department of Oral and Maxillo-Facial Surgery, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania;
| | - Ludmila Lozneanu
- Department of Morpho-Functional Sciences I, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (M.V.H.); (L.L.); (D.H.)
| | - Camelia Tamaș
- Department of Plastic and Reconstructive Surgery, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania;
| | - Anca Elena Calistru
- Department of Pedotechnics, “Ion Ionescu de la Brad” University of Life Sciences, 700490 Iasi, Romania;
| | - Liliana Hristian
- Department of Engineering and Design of Textile Products, “Gheorghe Asachi” Technical University of Iași, 700050 Iasi, Romania
| | - Delia Hînganu
- Department of Morpho-Functional Sciences I, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (M.V.H.); (L.L.); (D.H.)
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Barade A, Lakshmi KM, Korula A, Abubacker FN, Kulkarni UP, Abraham A, Mathews V, George B, Edison ES. Comparison of telomere length in patients with bone marrow failure syndromes and healthy controls. Eur J Haematol 2024; 112:810-818. [PMID: 38213291 DOI: 10.1111/ejh.14173] [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: 09/21/2023] [Revised: 01/02/2024] [Accepted: 01/03/2024] [Indexed: 01/13/2024]
Abstract
INTRODUCTION During normal aging, telomeric DNA is gradually lost in dividing somatic cells, and critically short telomeres lead to replicative senescence, apoptosis, or chromosomal instability. We studied telomere length in bone marrow failure syndromes (BMFS) compared to normal healthy population. METHODS Peripheral blood was collected from the participants, and genomic DNA was extracted. Relative telomere length was measured using a quantitative polymerase chain reaction. Statistical analysis was performed using SPSS and GraphPad Prism 8.2 software. RESULTS The median age of normal Indian population was 31 (0-60) years. As expected, telomere length (TL) showed a decline with age and no difference in TL between males and females. The median age of 650 patients with aplastic anemia (AA) was 30 (1-60) years. TL was significantly shorter in patients with AA compared to healthy controls (p < .001). In FA and MDS patients, TL was significantly shorter than age-matched healthy controls (p = .028; p < .001), respectively. There was no difference between the median TL in age-matched AA and FA patients (p = .727). However, patients with MDS had shorter TL than age-matched AA (p = .031). CONCLUSION TL in BMF syndrome patients was significantly shorter than age-matched healthy controls.
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Affiliation(s)
- Aruna Barade
- Department of Haematology, Christian Medical College, Vellore, India
- Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, India
| | - Kavitha M Lakshmi
- Department of Haematology, Christian Medical College, Vellore, India
| | - Anu Korula
- Department of Haematology, Christian Medical College, Vellore, India
| | | | - Uday P Kulkarni
- Department of Haematology, Christian Medical College, Vellore, India
| | - Aby Abraham
- Department of Haematology, Christian Medical College, Vellore, India
| | - Vikram Mathews
- Department of Haematology, Christian Medical College, Vellore, India
| | - Biju George
- Department of Haematology, Christian Medical College, Vellore, India
| | - Eunice S Edison
- Department of Haematology, Christian Medical College, Vellore, India
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Dilixiati D, Kadier K, Laihaiti D, Lu JD, Azhati B, Rexiati M. Association between leucocyte telomere length and erectile dysfunction in US adults: a secondary study based on 2001-2002 NHANES data. BMJ Open 2024; 14:e077808. [PMID: 38643009 PMCID: PMC11033652 DOI: 10.1136/bmjopen-2023-077808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 03/04/2024] [Indexed: 04/22/2024] Open
Abstract
OBJECTIVE We aimed to explore the association between the leucocyte telomere length (LTL) and erectile dysfunction (ED) among a nationally representative sample of US adults. DESIGN Secondary population-based study. SETTING The National Health and Nutrition Examination Survey (NHANES) (2001-2002). PARTICIPANTS A total of 1694 male participants were extracted from the NHANES database for 2001-2002. PRIMARY AND SECONDARY OUTCOME MEASURES The primary focus of the study was to determine the association between the LTL and ED, using multivariate logistic regression and restricted cubic spline models for examination. The secondary outcome measures involved conducting stratified subgroup analyses to exclude interactions of different variables with the LTL. RESULTS Participants with ED had shorter LTLs than those without ED (p<0.05). After adjusting for confounding factors, compared with the reference lowest LTL quartile, the ORs and 95% CIs for the second, third and fourth LTL quartiles were (OR 1.51; 95% CI 1.01 to 2.26), (OR 1.79; 95% CI 1.24 to 2.58) and (OR 1.25; 95% CI 0.74 to 2.11), respectively. In addition, restricted cubic splines showed an inverted J-curve relationship between the LTL and ED. At an LTL of 1.037, the curve showed an inflection point. The ORs (95% CI) of ED on the left and right sides of the inflection point were (OR 1.99; 95% CI 0.39 to 10.20; p=0.385) and (OR 0.17; 95% CI 0.03 to 0.90; p=0.039). CONCLUSION Our results demonstrated an inverted J-curve relationship between the LTL and ED. When the LTL was ≥1.037, the incidence of ED decreased with increasing LTL.
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Affiliation(s)
- Diliyaer Dilixiati
- Department of Urology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Kaisaierjiang Kadier
- Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Duolikun Laihaiti
- Department of Joint Surgery, Changji Branch of First Affiliated Hospital of Xinjiang Medical University, Changji, China
| | - Jian-De Lu
- Department of Urology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Baihetiya Azhati
- Department of Urology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Mulati Rexiati
- Department of Urology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
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Gao C. Investigating the association between blood metabolites and telomere length: A mendelian randomization study. PLoS One 2024; 19:e0298172. [PMID: 38457472 PMCID: PMC10923442 DOI: 10.1371/journal.pone.0298172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 01/19/2024] [Indexed: 03/10/2024] Open
Abstract
BACKGROUND Telomere length refers to the protective cap at the end of chromosomes, and it plays a crucial role in many diseases. The objective of this study is to explore the relationship between blood metabolites and telomere length, aiming to identify novel biological factors that influence telomere length. METHODS In this study, we extracted genome-wide association study (GWAS) data for blood metabolites from a sample of 7824 Europeans. Additionally, GWAS data for telomere length were obtained from the Open GWAS database (GWAS ID: ieu-b-4879). The primary analysis of this study utilized the random inverse variance weighted (IVW) method. Complementary analyses were also conducted using the MR-Egger and weighted median approaches. Sensitivity analyses were performed to assess the robustness of the findings. These included the Cochran Q test, MR-Egger intercept test, MR-PRESSO, and leave-one-out analysis. To investigate the possibility of reverse causation, reverse MR analysis was conducted. Additionally, multivariable MR was utilized to evaluate the direct effect of metabolites on telomere length. RESULTS The results suggested a potential association between 15-methylpalmitate, taurocholate, levulinate, and X-12712 and telomere length. MVMR analysis further showed that 15-methylpalmitate, taurocholate, and levulinate can directly influence telomere length, regardless of other metabolites. CONCLUSIONS This study suggests that 15-methylpalmitate, taurocholate, and levulinate are likely factors correlated with telomere length. These findings will contribute to the development of strategies for protecting telomeres, preventing related diseases, and establishing a new biological foundation for achieving healthy aging.
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Affiliation(s)
- Chen Gao
- Head and Neck Surgeons, Clinical Oncology School of Fujian Medical University, Fujian Cancer Hospital, Fujian, China
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Dominguez LJ, Veronese N, Barbagallo M. Magnesium and the Hallmarks of Aging. Nutrients 2024; 16:496. [PMID: 38398820 PMCID: PMC10892939 DOI: 10.3390/nu16040496] [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] [Received: 12/31/2023] [Revised: 02/01/2024] [Accepted: 02/05/2024] [Indexed: 02/25/2024] Open
Abstract
Magnesium is an essential ion in the human body that regulates numerous physiological and pathological processes. Magnesium deficiency is very common in old age. Age-related chronic diseases and the aging process itself are frequently associated with low-grade chronic inflammation, called 'inflammaging'. Because chronic magnesium insufficiency has been linked to excessive generation of inflammatory markers and free radicals, inducing a chronic inflammatory state, we formerly hypothesized that magnesium inadequacy may be considered among the intermediaries helping us explain the link between inflammaging and aging-associated diseases. We show in this review evidence of the relationship of magnesium with all the hallmarks of aging (genomic instability, telomere attrition, epigenetic alterations, loss of proteostasis, deregulated nutrient sensing, mitochondrial dysfunction, cellular senescence, stem cell exhaustion, altered intercellular communication, disabled autophagy, dysbiosis, and chronic inflammation), which may positively affect the human healthspan. It is feasible to hypothesize that maintaining an optimal balance of magnesium during one's life course may turn out to be a safe and economical strategy contributing to the promotion of healthy aging. Future well-designed studies are necessary to further explore this hypothesis.
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Affiliation(s)
- Ligia J. Dominguez
- School of Medicine, “Kore” University of Enna, 94100 Enna, Italy;
- Geriatric Unit, Department of Medicine, University of Palermo, 90127 Palermo, Italy;
| | - Nicola Veronese
- Geriatric Unit, Department of Medicine, University of Palermo, 90127 Palermo, Italy;
| | - Mario Barbagallo
- Geriatric Unit, Department of Medicine, University of Palermo, 90127 Palermo, Italy;
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Yang H, Gong R, Liu M, Deng Y, Zheng X, Hu T. HOMA-IR is positively correlated with biological age and advanced aging in the US adult population. Eur J Med Res 2023; 28:470. [PMID: 37898776 PMCID: PMC10612177 DOI: 10.1186/s40001-023-01448-1] [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] [Received: 05/03/2023] [Accepted: 10/15/2023] [Indexed: 10/30/2023] Open
Abstract
BACKGROUND Insulin resistance (IR) had been reported to be associated with age; however, few studies have explored the association between IR and biological age (BA). The HOMA-IR value is a useful indicator of the extent of IR. This cross-sectional study is to explore the relationship between HOMA-IR and BA/advanced aging in the US population. METHODS This study is a cross-sectional analysis of National Health and Nutrition Examination Survey (NHANES) data. The survey comprised 12,266 people from the NHANES, and their full HOMA-IR data as well as BA data were extracted. Four multiple linear regressions were performed to analyze the association between HOMA-IR and BA, and four multiple logistic regression models were performed to analyze the association between HOMA-IR and advanced aging. In addition, trend tests and stratified analysis were performed and smoothed fitted curves were plotted to test the robustness of the results. RESULTS HOMA-IR was positively correlated with BA [β: 0.51 (0.39, 0.63)], and it was the same to advanced aging [OR: 1.05 (1.02, 1.07)], and both showed a monotonically increasing trend. The trend tests showed that the results were stable (all P for trend < 0.0001). The smoothed fitted curves showed that there were non-linear relationships between HOMA-IR and BA/advanced aging. And the stratified analysis indicated that the relationship between HOMA-IR and BA/advanced aging remained robust in all subgroups. CONCLUSION The study suggested that HOMA-IR is positively correlated with BA and advanced aging in the US adult population, with a monotonic upward trend. This is a new finding to reveal the relationship between HOMA-IR and age from new standpoint of BA rather than chronological age (CA). And it may contribute to a better understanding of human health aging and may aid future research in this field.
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Affiliation(s)
- Haifang Yang
- Medical College of Qinghai University, Xining, China
| | - Rongpeng Gong
- Medical College of Qinghai University, Xining, China
| | - Moli Liu
- Medical College of Qinghai University, Xining, China
| | - Ying Deng
- Department of Cardiology, The First Branch, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaoyu Zheng
- School of Clinical Medicine, Chongqing Medical and Pharmaceutical College, Chongqing, China.
| | - Tianyang Hu
- Precision Medicine Center, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China.
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Martyshkina YS, Tereshchenko VP, Bogdanova DA, Rybtsov SA. Reliable Hallmarks and Biomarkers of Senescent Lymphocytes. Int J Mol Sci 2023; 24:15653. [PMID: 37958640 PMCID: PMC10647376 DOI: 10.3390/ijms242115653] [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: 10/06/2023] [Revised: 10/20/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
The phenomenon of accumulation of senescent adaptive immunity cells in the elderly is attracting attention due to the increasing risk of global epidemics and aging of the global population. Elderly people are predisposed to various infectious and age-related diseases and are at higher risk of vaccination failure. The accumulation of senescent cells increases age-related background inflammation, "Inflammaging", causing lymphocyte exhaustion and cardiovascular, neurodegenerative, autoimmune and cancer diseases. Here, we present a comprehensive contemporary review of the mechanisms and phenotype of senescence in the adaptive immune system. Although modern research has not yet identified specific markers of aging lymphocytes, several sets of markers facilitate the separation of the aging population based on normal memory and exhausted cells for further genetic and functional analysis. The reasons for the higher predisposition of CD8+ T-lymphocytes to senescence compared to the CD4+ population are also discussed. We point out approaches for senescent-lymphocyte-targeting markers using small molecules (senolytics), antibodies and immunization against senescent cells. The suppression of immune senescence is the most relevant area of research aimed at developing anti-aging and anti-cancer therapy for prolonging the lifespan of the global population.
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Affiliation(s)
- Yuliya S. Martyshkina
- Division of Immunobiology and Biomedicine, Center for Genetics and Life Sciences, Sirius University of Science and Technology, Olimpiyskiy Ave. b.1, Sirius 354340, Krasnodar Region, Russia; (Y.S.M.)
| | - Valeriy P. Tereshchenko
- Resource Center for Cell Technology and Immunology, Sirius University of Science and Technology, Olimpiyskiy Ave. b.1, Sirius 354340, Krasnodar Region, Russia
| | - Daria A. Bogdanova
- Division of Immunobiology and Biomedicine, Center for Genetics and Life Sciences, Sirius University of Science and Technology, Olimpiyskiy Ave. b.1, Sirius 354340, Krasnodar Region, Russia; (Y.S.M.)
| | - Stanislav A. Rybtsov
- Resource Center for Cell Technology and Immunology, Sirius University of Science and Technology, Olimpiyskiy Ave. b.1, Sirius 354340, Krasnodar Region, Russia
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14
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Tsikas D, Tsikas SA, Mikuteit M, Ückert S. Circulating and Urinary Concentrations of Malondialdehyde in Aging Humans in Health and Disease: Review and Discussion. Biomedicines 2023; 11:2744. [PMID: 37893117 PMCID: PMC10604150 DOI: 10.3390/biomedicines11102744] [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: 09/06/2023] [Revised: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
(1) Background: Malondialdehyde (MDA) is a major and stable product of oxidative stress. MDA circulates in the blood and is excreted in the urine in its free and conjugated forms, notably with L-lysine and L-serine. MDA is the most frequently measured biomarker of oxidative stress, namely lipid peroxidation. Oxidative stress is generally assumed to be associated with disease and to increase with age. Here, we review and discuss the literature concerning circulating and excretory MDA as a biomarker of lipid peroxidation in aging subjects with regard to health and disease, such as kidney disease, erectile dysfunction, and COVID-19. (2) Methods: Scientific articles, notably those reporting on circulating (plasma, serum) and urinary MDA, which concern health and disease, and which appeared in PubMed were considered; they formed the basis for evaluating the potential increase in oxidative stress, particularly lipid peroxidation, as humans age. (3) Results and Conclusions: The results reported in the literature thus far are contradictory. The articles considered in the present study are not supportive of the general view that oxidative stress increases with aging. Many functions of several organs, including the filtration efficiency of the kidneys, are physiologically reduced in men and women as they age. This effect is likely to result in the apparent "accumulation" of biomarkers of oxidative stress, concomitantly with the "accumulation" of biomarkers of an organ's function, such as creatinine. How free and conjugated MDA forms are transported in various organs (including the brain) and how they are excreted in the urine via the kidney is not known, and investigating these questions should be the objective of forthcoming studies. The age- and gender-related increase in circulating creatinine might be a useful factor to be taken into consideration when investigating oxidative stress and aging.
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Affiliation(s)
- Dimitrios Tsikas
- Core Unit Proteomics, Institute of Toxicology, Hannover Medical School, 30623 Hannover, Germany
| | - Stefanos A. Tsikas
- Dean’s of Office of Studies, Academic Controlling, Hannover Medical School, 30623 Hannover, Germany
| | - Marie Mikuteit
- Department of Rheumatology and Immunology, Hannover Medical School, 30623 Hannover, Germany
- Dean’s Office, Curriculum Development, Hannover Medical School, 30623 Hannover, Germany
| | - Stefan Ückert
- Department of Urology and Urological Oncology, Division of Surgery, Hannover Medical School, 30623 Hannover, Germany
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15
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Sharma R, Diwan B. Lipids and the hallmarks of ageing: From pathology to interventions. Mech Ageing Dev 2023; 215:111858. [PMID: 37652278 DOI: 10.1016/j.mad.2023.111858] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/21/2023] [Accepted: 08/28/2023] [Indexed: 09/02/2023]
Abstract
Lipids are critical structural and functional architects of cellular homeostasis. Change in systemic lipid profile is a clinical indicator of underlying metabolic pathologies, and emerging evidence is now defining novel roles of lipids in modulating organismal ageing. Characteristic alterations in lipid metabolism correlate with age, and impaired systemic lipid profile can also accelerate the development of ageing phenotype. The present work provides a comprehensive review of the extent of lipids as regulators of the modern hallmarks of ageing viz., cellular senescence, chronic inflammation, gut dysbiosis, telomere attrition, genome instability, proteostasis and autophagy, epigenetic alterations, and stem cells dysfunctions. Current evidence on the modulation of each of these hallmarks has been discussed with emphasis on inherent age-dependent deficiencies in lipid metabolism as well as exogenous lipid changes. There appears to be sufficient evidence to consider impaired lipid metabolism as key driver of the ageing process although much of knowledge is yet fragmented. Considering dietary lipids, the type and quantity of lipids in the diet is a significant, but often overlooked determinant that governs the effects of lipids on ageing. Further research using integrative approaches amidst the known aging hallmarks is highly desirable for understanding the therapeutics of lipids associated with ageing.
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Affiliation(s)
- Rohit Sharma
- Nutrigerontology Laboratory, Faculty of Applied Sciences & Biotechnology, Shoolini University, Solan 173229, India.
| | - Bhawna Diwan
- Nutrigerontology Laboratory, Faculty of Applied Sciences & Biotechnology, Shoolini University, Solan 173229, India
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16
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Romero-Haro AA, Figuerola J, Alonso-Alvarez C. Low Antioxidant Glutathione Levels Lead to Longer Telomeres: A Sex-Specific Link to Longevity? Integr Org Biol 2023; 5:obad034. [PMID: 37753451 PMCID: PMC10519275 DOI: 10.1093/iob/obad034] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 06/22/2023] [Accepted: 08/29/2023] [Indexed: 09/28/2023] Open
Abstract
Telomeres are repetitive DNA sequences at the end of chromosomes that protect them from degradation. They have been the focus of intense research because short telomeres would predict accelerated ageing and reduced longevity in vertebrates. Oxidative stress is considered a physiological driver of the telomere shortening and, consequently, short lifespan. Among molecules fighting against oxidative stress, glutathione is involved in many antioxidant pathways. Literature supports that oxidative stress may trigger a compensatory "hormetic" response increasing glutathione levels and telomere length. Here, we tested the link between total glutathione concentration and telomere length in captive birds (zebra finches; Taeniopygia guttata). Total glutathione levels were experimentally decreased during birds' growth using a specific inhibitor of glutathione synthesis (buthionine sulfoximine; BSO). We monitored the birds' reproductive performance in an outdoor aviary during the first month of life, and their longevity for almost 9 years. Among control individuals, erythrocyte glutathione levels during development positively predicted erythrocyte telomere length in adulthood. However, BSO-treated females, but not males, showed longer telomeres than control females in adulthood. This counterintuitive finding suggests that females mounted a compensatory response. Such compensation agrees with precedent findings in the same population where the BSO treatment increased growth and adult body mass in females but not males. BSO did not influence longevity or reproductive output in any sex. However, early glutathione levels and adult telomere length interactively predicted longevity only among control females. Those females with "naturally" low (non-manipulated) glutathione levels at the nestling age but capable of producing longer telomeres in adulthood seem to live longer. The results suggest that the capability to mount a hormetic response triggered by low early glutathione levels can improve fitness via telomere length. Overall, the results may indicate a sex-specific link between glutathione and telomere values. Telomerase activity and sexual steroids (estrogens) are good candidates to explain the sex-biased mechanism underlying the early-life impact of oxidative stress on adult telomere length.
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Affiliation(s)
- A A Romero-Haro
- Instituto de Investigación en Recursos Cinegéticos (IREC), CSIC-UCLM-JCCM, Ronda de Toledo 12, 13071Ciudad Real, 41092 Sevilla, Spain
| | - J Figuerola
- Estación Biológica de Doñana—CSIC, Sevilla, 28029 Madrid, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - C Alonso-Alvarez
- Evolutionary Ecology Department, National Museum of Natural Sciences (MNCN-CSIC), C/José Gutiérrez Abascal 2, 28006 Madrid, Spain
- Instituto Pirenaico de Ecología (IPE-CSIC) Avda. Nuestra Señora de la Victoria, 16. 22700 Jaca, Huesca, Spain
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17
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You Y, Chen Y, Wang X, Wei M, Zhang Q, Cao Q. Accelerometer-measured physical activity patterns are associated with phenotypic age: Isotemporal substitution effects. Heliyon 2023; 9:e19158. [PMID: 37810111 PMCID: PMC10558316 DOI: 10.1016/j.heliyon.2023.e19158] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 08/14/2023] [Accepted: 08/14/2023] [Indexed: 10/10/2023] Open
Abstract
Prolonged sitting appears to accelerate aging, while optimal physical activity patterns have been found to delay the process. It is an emerging topic, and no conclusions have been reached regarding the relationship between physical activity patterns and biomarkers-measured aging. Hence, the aim of this study was to investigate the association between sensor-based objectively measured physical activity and phenotypic age using a nationwide population from the National Health and Nutrition Examination Survey (NHANES) in the United States. Weighted linear regression models were performed to evaluate the association between sedentary behavior, light-intensity physical activity (LPA), moderate-to-vigorous physical activity (MVPA) and phenotypic age. A total of 6439 eligible participants were included and the weighted respondents were 49,964,300. Results showed that prolonged sitting was positively associated with phenotypic age in the fully adjusted model [β (95% CI): 0.009(0.007,0.011), p < 0.001], while increasing volume of LPA and MVPA was associated with younger phenotypic age using the fully adjusted model [β (95% CI): -0.010(-0.013,-0.006), p < 0.001; -0.062(-0.075,-0.048), p < 0.001]. By utilizing the Isotemporal Substitution Model, it was found that replacing 30 min of sedentary behavior with 30 min of LPA or MVPA per day was associated with estimated 0.4 or 1.9 years of phenotypic age reduction. According to the study's findings, maintaining a certain level of physical activity could delay the process of aging and intensity matters.
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Affiliation(s)
- Yanwei You
- Division of Sports Science & Physical Education, Tsinghua University, Beijing 100084, China
| | - Yuquan Chen
- Institute of Medical Information/Medical Library, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100020, China
| | - Xiaoxin Wang
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, Harbin 150081, China
| | - Mengxian Wei
- Division of Sports Science & Physical Education, Tsinghua University, Beijing 100084, China
| | - Qi Zhang
- Undergraduate Department, Taishan University, Taian 250111, China
| | - Qiang Cao
- Department of Earth Sciences, Kunming University of Science and Technology, Kunming 650093, China
- School of Pharmacy, Macau University of Science and Technology, Macau 999078, China
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18
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Doherty T, Dempster E, Hannon E, Mill J, Poulton R, Corcoran D, Sugden K, Williams B, Caspi A, Moffitt TE, Delany SJ, Murphy TM. A comparison of feature selection methodologies and learning algorithms in the development of a DNA methylation-based telomere length estimator. BMC Bioinformatics 2023; 24:178. [PMID: 37127563 PMCID: PMC10152624 DOI: 10.1186/s12859-023-05282-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 04/11/2023] [Indexed: 05/03/2023] Open
Abstract
BACKGROUND The field of epigenomics holds great promise in understanding and treating disease with advances in machine learning (ML) and artificial intelligence being vitally important in this pursuit. Increasingly, research now utilises DNA methylation measures at cytosine-guanine dinucleotides (CpG) to detect disease and estimate biological traits such as aging. Given the challenge of high dimensionality of DNA methylation data, feature-selection techniques are commonly employed to reduce dimensionality and identify the most important subset of features. In this study, our aim was to test and compare a range of feature-selection methods and ML algorithms in the development of a novel DNA methylation-based telomere length (TL) estimator. We utilised both nested cross-validation and two independent test sets for the comparisons. RESULTS We found that principal component analysis in advance of elastic net regression led to the overall best performing estimator when evaluated using a nested cross-validation analysis and two independent test cohorts. This approach achieved a correlation between estimated and actual TL of 0.295 (83.4% CI [0.201, 0.384]) on the EXTEND test data set. Contrastingly, the baseline model of elastic net regression with no prior feature reduction stage performed less well in general-suggesting a prior feature-selection stage may have important utility. A previously developed TL estimator, DNAmTL, achieved a correlation of 0.216 (83.4% CI [0.118, 0.310]) on the EXTEND data. Additionally, we observed that different DNA methylation-based TL estimators, which have few common CpGs, are associated with many of the same biological entities. CONCLUSIONS The variance in performance across tested approaches shows that estimators are sensitive to data set heterogeneity and the development of an optimal DNA methylation-based estimator should benefit from the robust methodological approach used in this study. Moreover, our methodology which utilises a range of feature-selection approaches and ML algorithms could be applied to other biological markers and disease phenotypes, to examine their relationship with DNA methylation and predictive value.
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Affiliation(s)
- Trevor Doherty
- School of Biological, Health and Sports Sciences, Technological University Dublin, Dublin, Ireland.
- SFI Centre for Research Training in Machine Learning, Technological University Dublin, Dublin, Ireland.
| | - Emma Dempster
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Eilis Hannon
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Jonathan Mill
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Richie Poulton
- Department of Psychology, University of Otago, Dunedin, 9016, New Zealand
| | - David Corcoran
- Center for Genomic and Computational Biology, Duke University, Durham, NC, 27708, USA
| | - Karen Sugden
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Ben Williams
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Avshalom Caspi
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Terrie E Moffitt
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Sarah Jane Delany
- School of Computer Science, Technological University Dublin, Dublin, Ireland
| | - Therese M Murphy
- School of Biological, Health and Sports Sciences, Technological University Dublin, Dublin, Ireland
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Identification of a Novel Wnt Antagonist Based Therapeutic and Diagnostic Target for Alzheimer's Disease Using a Stem Cell-Derived Model. Bioengineering (Basel) 2023; 10:bioengineering10020192. [PMID: 36829686 PMCID: PMC9952699 DOI: 10.3390/bioengineering10020192] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/12/2022] [Accepted: 10/13/2022] [Indexed: 02/05/2023] Open
Abstract
Currently, all the existing treatments for Alzheimer's disease (AD) fail to stall progression due to longer duration of time between onset of the symptoms and diagnosis of the disease, raising the necessity of effective diagnostics and novel treatment. Specific molecular regulation of the onset and progression of disease is not yet elucidated. This warranted investigation of the role of Wnt signaling regulators which are thought to be involved in neurogenesis. The AD model was established using amyloid beta (Aβ) in human mesenchymal stem cells derived from amniotic membranes which were differentiated into neuronal cell types. In vivo studies were carried out with Aβ or a Wnt antagonist, AD201, belonging to the sFRP family. We further created an AD201-knockdown in vitro model to determine the role of Wnt antagonism. BACE1 upregulation, ChAT and α7nAChR downregulation with synapse and functionality loss with increases in ROS confirmed the neurodegeneration. Reduced β-catenin and increased AD201 expression indicated Wnt/canonical pathway inhibition. Similar results were exhibited in the in vivo study along with AD-associated behavioural and molecular changes. AD201-knockdown rescued neurons from Aβ-induced toxicity. We demonstrated for the first time a role of AD201 in Alzheimer's disease manifestation, which indicates a promising disease target and biomarker.
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Lupatov AY, Yarygin KN. Telomeres and Telomerase in the Control of Stem Cells. Biomedicines 2022; 10:biomedicines10102335. [PMID: 36289597 PMCID: PMC9598777 DOI: 10.3390/biomedicines10102335] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/15/2022] [Accepted: 09/16/2022] [Indexed: 11/16/2022] Open
Abstract
Stem cells serve as a source of cellular material in embryogenesis and postnatal growth and regeneration. This requires significant proliferative potential ensured by sufficient telomere length. Telomere attrition in the stem cells and their niche cells can result in the exhaustion of the regenerative potential of high-turnover organs, causing or contributing to the onset of age-related diseases. In this review, stem cells are examined in the context of the current telomere-centric theory of cell aging, which assumes that telomere shortening depends not just on the number of cell doublings (mitotic clock) but also on the influence of various internal and external factors. The influence of the telomerase and telomere length on the functional activity of different stem cell types, as well as on their aging and prospects of use in cell therapy applications, is discussed.
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