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Immunosenescence

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https://www.readbyqxmd.com/read/28733462/human-t-cell-immunosenescence-and-inflammation-in-aging
#1
REVIEW
Arsun Bektas, Shepherd H Schurman, Ranjan Sen, Luigi Ferrucci
The aging process is driven by a finite number of inter-related mechanisms that ultimately lead to the emergence of characteristic phenotypes, including increased susceptibility to multiple chronic diseases, disability, and death. New assays and analytical tools have become available that start to unravel some of these mechanisms. A prevailing view is that aging leads to an imbalance between stressors and stress-buffering mechanisms that causes loss of compensatory reserve and accumulation of unrepaired damage...
July 21, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28731941/the-biology-of-aging-and-cancer-frailty-inflammation-and-immunity
#2
Xinwen Zhang, Xin Meng, Yiyin Chen, Sean X Leng, Haiyan Zhang
The majority of patients with common malignancies are older adults. Intrinsic complex biological changes of aging along with inflammation, immunosenescence, age-associated chronic diseases, and extrinsic environmental and psychosocial factors have significant impact on not only development and behavior of individual malignancies, but also physiologic reserve and vulnerability of older patients who suffer from them. As a result, clinical practice of geriatric oncology demands integration of careful geriatric assessment and management...
July 2017: Cancer Journal
https://www.readbyqxmd.com/read/28713963/sexual-dimorphism-of-frailty-and-cognitive-impairment-potential-underlying-mechanisms-review
#3
Qingwei Ruan, Grazia D'onofrio, Tao Wu, Antonio Greco, Daniele Sancarlo, Zhuowei Yu
The aim of the present study was to assess systematically gender differences in susceptibility to frailty and cognitive performance decline, and the underlying mechanisms. A systematic assessment was performed of the identified reviews of cohort, mechanistic and epidemiological studies. The selection criteria of the present study included: i) Sexual dimorphism of frailty, ii) sexual dimorphism of subjective memory decline (impairment) and atrophy of hippocampus during early life, iii) sexual dimorphism of late‑onset Alzheimer's disease and iv) sexual dimorphism mechanisms underlying frailty and cognitive impairment...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28710491/ageing-and-latent-cmv-infection-impact-on-maturation-differentiation-and-exhaustion-profiles-of-t-cell-receptor-gammadelta-t-cells
#4
Martine J Kallemeijn, Anne Mieke H Boots, Michèle Y van der Klift, Elisabeth Brouwer, Wayel H Abdulahad, Jan A N Verhaar, Jacques J M van Dongen, Anton W Langerak
Ageing is a broad cellular process, largely affecting the immune system, especially T-lymphocytes. Additionally to immunosenescence alone, cytomegalovirus (CMV) infection is thought to have major impacts on T-cell subset composition and exhaustion. These impacts have been studied extensively in TCRαβ+ T-cells, with reduction in naive, increase in effector (memory) subsets and shifts in CD4/CD8-ratios, in conjunction with morbidity and mortality in elderly. Effects of both ageing and CMV on the TCRγδ+ T-cell compartment remain largely elusive...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28708957/influenza-vaccination-in-the-elderly
#5
Smetana Jan, Chlibek Roman, Shaw Jana, Splino Miroslav, Prymula Roman
Seasonal influenza is a prevalent and serious annual illness resulting in widespread morbidity and economic disruption throughout the population; the elderly and immunocompromised are particularly vulnerable to serious sequelae and mortality. The changing demographics worldwide to an aging society have important implications for public health policy and pharmaceutical innovations. For instance, primary prevention via immunization is effective in reducing the burden of influenza illness among the elderly. However, the elderly may be insufficiently protected by vaccination due to the immunosenescence which accompanies aging...
July 14, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28707376/immunosenescence-induced-by-plasma-from-individuals-with-obesity-caused-cell-signaling-dysfunction-and-inflammation
#6
Mariana Migliorini Parisi, Lucas Kich Grun, Patrícia Lavandoski, Letícia Biscaino Alves, Ivi Juliana Bristot, Rita Mattiello, Cláudio Corá Mottin, Fábio Klamt, Marcus Herbert Jones, Alexandre Vontobel Padoin, Fátima Costa Rodrigues Guma, Florencia María Barbé-Tuana
OBJECTIVE: To evaluate the consequences of plasma from individuals with obesity on parameters associated with immunosenescence in unrelated healthy peripheral blood mononuclear cells (PBMC). METHODS: Freshly isolated PBMC were incubated in media supplemented with 10% of plasma from individuals with obesity or control subjects for the first 4 hours of 24 to 120 hours of culture. RESULTS: Plasma from individuals with obesity modulated the phenotype of healthy PBMC, leading to a higher rate of apoptosis, lower amounts of phospho-γH2AX and -p53, and mitochondrial dysfunction...
July 14, 2017: Obesity
https://www.readbyqxmd.com/read/28700738/age-dependent-differences-in-the-kinetics-of-%C3%AE-%C3%AE-t-cells-after-influenza-vaccination
#7
Ulrik Stervbo, Dominika Pohlmann, Udo Baron, Cecilia Bozzetti, Karsten Jürchott, Julia Nora Mälzer, Mikalai Nienen, Sven Olek, Toralf Roch, Axel Ronald Schulz, Sarah Warth, Avidan Neumann, Andreas Thiel, Andreas Grützkau, Nina Babel
Immunosenescence is a hallmark of the aging immune system and is considered the main cause of a reduced vaccine efficacy in the elderly. Although γδ T cells can become activated by recombinant influenza hemagglutinin, their age-related immunocompetence during a virus-induced immune response has so far not been investigated. In this study we evaluate the kinetics of γδ T cells after vaccination with the trivalent 2011/2012 northern hemisphere seasonal influenza vaccine. We applied multi-parametric flow cytometry to a cohort of 21 young (19-30 years) and 23 elderly (53-67 years) healthy individuals...
2017: PloS One
https://www.readbyqxmd.com/read/28700679/aged-associated-cytomegalovirus-and-epstein-barr-virus-reactivation-and-cytomegalovirus-relationship-with-the-frailty-syndrome-in-older-women
#8
Ronaldo Luis Thomasini, Daniele Sirineu Pereira, Fabiana Souza Máximo Pereira, Elvis Cueva Mateo, Thamires Nader Mota, Gabrielle Gontijo Guimarães, Leani Souza Máximo Pereira, Cristiano Xavier Lima, Mauro Martins Teixeira, Antônio Lúcio Teixeira
Immunosenescence is an age-related reduction of immune system activity that can be associated with frailty. This study aimed to compare cytomegalovirus (CMV) and Epstein-Barr virus (EBV) reactivations (based on viremias) between young and elderly women who had a chronic CMV and/or EBV infection (i.e., an IgG+ serostatus) without an acute infection (i.e., an IgM- serostatus), and among the elderly group categorized according to frailty status. DNA was extracted from plasma using standard protocols and serostatus was determined by enzyme-linked immunosorbent assay...
2017: PloS One
https://www.readbyqxmd.com/read/28699360/mir-34a-and-mir-9-are-overexpressed-and-sirt-genes-are-downregulated-in-peripheral-blood-mononuclear-cells-of-aging-humans
#9
Magdalena Owczarz, Monika Budzinska, Anna Domaszewska-Szostek, Joanna Borkowska, Jacek Polosak, Magdalena Gewartowska, Przemyslaw Slusarczyk, Monika Puzianowska-Kuznicka
Increased expression of sirtuins lowers the risk of age-related diseases, while their role in the regulation of longevity is not firmly established. Since aging is associated with immunosenescence, we tested whether sirtuin expression was modified in peripheral blood mononuclear cells (PBMC) in an age-related manner and whether this might result from altered expression of the selected miRNAs. The expression of seven SIRT genes and of SIRT1 mRNA-interacting miR-9, miR-34a, miR-132, and miR-199a-5p was evaluated by real-time PCR in PBMC originating from young (Y, n = 57, mean age 27 ± 4...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28689651/frequencies-of-peripheral-immune-cells-in-older-adults-following-seasonal-influenza-vaccination-with-an-adjuvanted-vaccine
#10
David Goldeck, Heidi Theeten, Fakhri Hassouneh, Lilly Oettinger, Kilian Wistuba-Hamprecht, Nathalie Cools, Ourania E Tsitsilonis, Graham Pawelec
As age increases, immune responses and consequently protection following vaccination to seasonal influenza is commonly believed to decrease. Possible drivers of this immune dysfunction include immunosenescence, repeated exposure to the same seasonal influenza antigens, and prior infection with cytomegalovirus (CMV). Here, to determine immune parameters distinguishing vaccine humoral responders (R) from non-responders (NR) following vaccination, we surveyed broad peripheral blood "cellular immune correlates" of older adults vaccinated with Fluad® (an adjuvanted subunit influenza vaccine containing strains H1N1, H3N2 and B)...
July 6, 2017: Vaccine
https://www.readbyqxmd.com/read/28689093/immune-checkpoint-inhibitors-and-elderly-people-a%C3%A2-review
#11
REVIEW
Amaury Daste, Charlotte Domblides, Marine Gross-Goupil, Camille Chakiba, Amandine Quivy, Valérie Cochin, Erwan de Mones, Nicolas Larmonier, Pierre Soubeyran, Alain Ravaud
Immune checkpoint inhibitors, including targeting programmed cell death 1, programmed cell death ligand 1, and cytotoxic T lymphocyte antigen 4 pathways, are a new type of cancer treatment. This approach of targeting the immune system has demonstrated dramatic efficacy for several cancers, and various drugs have been approved by health authorities and are used in clinical practice. Elderly patients (≥65 years) represent most of the cancers diagnosed and deaths by age group, with an increase expected over the next decade...
July 6, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28687893/erratum-to-the-role-of-gender-and-labour-status-in-immunosenescence-of-65-polish-population
#12
Magdalena Dudkowska, Dorota Janiszewska, Anna Karpa, Katarzyna Broczek, Michal Dabrowski, Ewa Sikora
No abstract text is available yet for this article.
July 7, 2017: Biogerontology
https://www.readbyqxmd.com/read/28687075/seasonal-influenza-vaccination-coverage-and-its-determinants-among-nursing-homes-personnel-in-western-france
#13
Christelle Elias, Anna Fournier, Anca Vasiliu, Nicolas Beix, Rémi Demillac, Hélène Tillaut, Yvonnick Guillois, Serge Eyebe, Bastien Mollo, Pascal Crépey
BACKGROUND: Influenza-associated deaths is an important risk for the elderly in nursing homes (NHs) worldwide. Vaccination coverage among residents is high but poorly effective due to immunosenescence. Hence, vaccination of personnel is an efficient way to protect residents. Our objective was to quantify the seasonal influenza vaccination (IV) coverage among NH for elderly workers and identify its determinants in France. METHODS: We conducted a cross-sectional study in March 2016 in a randomized sample of NHs of the Ille-et-Vilaine department of Brittany, in western France...
July 7, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28684670/role-of-hormones-in-the-regulation-of-rack1-expression-as-a-signaling-checkpoint-in-immunosenescence
#14
REVIEW
Marco Racchi, Erica Buoso, Melania Ronfani, Melania M Serafini, Marilisa Galasso, Cristina Lanni, Emanuela Corsini
Immunosenescence defines the decline in immune function that occurs with aging. This has been associated, at least in part, with defective cellular signaling via protein kinase C (PKC) signal transduction pathways. Our data suggest reduced PKC activation and consequently reduced response to lipopolysaccharide (LPS) stimulation and cytokine release. The lack of PKC activation seems to be dependent on the reduced expression of the receptor for activated C kinase 1 (RACK1), a scaffolding protein involved in multiple signal transduction cascades...
July 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28681110/recent-advances-in-cmv-tropism-latency-and-diagnosis-during-aging
#15
Sean X Leng, Jeremy Kamil, John G Purdy, Niels A Lemmermann, Matthias J Reddehase, Felicia D Goodrum
Human cytomegalovirus (CMV) is one of the largest viruses known to cause human diseases. Chronic CMV infection, as defined by anti-CMV IgG serology, increases with age and is highly prevalent in older adults. It has complex biology with significant immunologic and health consequences. This article aims to summarize research findings presented at the 6th International Workshop on CMV and Immunosenescence that relate to advances in the areas of CMV tropism, latency, CMV manipulation of cell metabolism, and T cell memory inflation, as well as novel diagnostic evaluation and translational research of chronic CMV infection in older adults...
July 5, 2017: GeroScience
https://www.readbyqxmd.com/read/28674537/increased-il-15-production-and-accumulation-of-highly-differentiated-cd8-effector-memory-t-cells-in-the-bone-marrow-of-persons-with-cytomegalovirus
#16
Luca Pangrazzi, Erin Naismith, Andreas Meryk, Michael Keller, Brigitte Jenewein, Klemens Trieb, Beatrix Grubeck-Loebenstein
Cytomegalovirus (CMV) has been described as a contributor to immunosenescence, thus exacerbating age-related diseases. In persons with latent CMV infection, the CD8(+) T cell compartment is irreversibly changed, leading to the accumulation of highly differentiated virus-specific CD8(+) T cells in the peripheral blood. The bone marrow (BM) has been shown to play a major role in the long-term survival of antigen-experienced T cells. Effector CD8(+) T cells are preferentially maintained by the cytokine IL-15, the expression of which increases in old age...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28669032/immunosenescence-the-role-of-aging-in-the-predisposition-to-neuro-infectious-complications-arising-from-the-treatment-of-multiple-sclerosis
#17
REVIEW
Elena Grebenciucova, Joseph R Berger
PURPOSE OF REVIEW: This review highlights some of the important changes in the immune system that occur in the process of normal aging. Immunosenescence as a concept is directly relevant to the world of neuro-inflammation, as it may be a contributing factor to the risks associated with some of the current immunosuppressive and immunomodulatory therapies used in treating multiple sclerosis (MS) and other inflammatory disorders. RECENT FINDINGS: Profound qualitative and quantitative changes occur in the adaptive and innate immunity compartments during aging...
August 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28659812/strength-training-decreases-inflammation-and-increases-cognition-and-physical-fitness-in-older-women-with-cognitive-impairment
#18
Matheus U Chupel, Fábio Direito, Guilherme E Furtado, Luciéle G Minuzzi, Filipa M Pedrosa, Juan C Colado, José P Ferreira, Edith Filaire, Ana M Teixeira
Introduction: Cognitive impairment that affects older adults is commonly associated with an inflammatory imbalance, resulting in decreased physical fitness. Exercise has been pointed to mitigate immunosenescence and cognitive impairment associated with aging, while increase in physical fitness. However, few studies explored the relationship between changes in cytokine concentration and improvement on cognition due to elastic band strength training. The aim of this study was to investigate the effects of strength training on pro-and anti-inflammatory cytokines, hematological markers and physical fitness of older women with cognitive impairment...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28654021/vitamin-c-aging-and-alzheimer-s-disease
#19
REVIEW
Fiammetta Monacelli, Erica Acquarone, Chiara Giannotti, Roberta Borghi, Alessio Nencioni
Accumulating evidence in mice models of accelerated senescence indicates a rescuing role of ascorbic acid in premature aging. Supplementation of ascorbic acid appeared to halt cell growth, oxidative stress, telomere attrition, disorganization of chromatin, and excessive secretion of inflammatory factors, and extend lifespan. Interestingly, ascorbic acid (AA) was also found to positively modulate inflamm-aging and immunosenescence, two hallmarks of biological aging. Moreover, ascorbic acid has been shown to epigenetically regulate genome integrity and stability, indicating a key role of targeted nutrition in healthy aging...
June 27, 2017: Nutrients
https://www.readbyqxmd.com/read/28646957/whither-vaccines
#20
Charlene M C Rodrigues, Marta V Pinto, Manish Sadarangani, Stanley A Plotkin
Currently used vaccines have had major effects on eliminating common infections, largely by duplicating the immune responses induced by natural infections. Now vaccinology faces more complex problems, such as waning antibody, immunosenescence, evasion of immunity by the pathogen, deviation of immunity by the microbiome, induction of inhibitory responses, and complexity of the antigens required for protection. Fortunately, vaccine development is now incorporating knowledge from immunology, structural biology, systems biology and synthetic chemistry to meet these challenges...
June 2017: Journal of Infection
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