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Immunosenescence

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https://www.readbyqxmd.com/read/29349889/t-cell-immunoglobulin-and-itim-domain-contributes-to-cd8-t-cell-immunosenescence
#1
Yangzi Song, Beibei Wang, Rui Song, Yu Hao, Di Wang, Yuxin Li, Yu Jiang, Ling Xu, Yaluan Ma, Hong Zheng, Yaxian Kong, Hui Zeng
Aging is associated with immune dysfunction, especially T-cell defects, which result in increased susceptibility to various diseases. Previous studies showed that T cells from aged mice express multiple inhibitory receptors, providing evidence of the relationship between T-cell exhaustion and T-cell senescence. In this study, we showed that T-cell immunoglobulin and immunoreceptor tyrosine-based inhibitory motif (ITIM) domain (TIGIT), a novel co-inhibitory receptor, was upregulated in CD8+ T cells of elderly adults...
January 19, 2018: Aging Cell
https://www.readbyqxmd.com/read/29341892/premature-aging-in-behavior-and-immune-functions-in-tyrosine-hydroxylase-haploinsufficient-female-mice-a-longitudinal-study
#2
A Garrido, J Cruces, N Ceprián, C Hernández-Sánchez, M De la Fuente
Aging is accompanied by impairment in the nervous, immune, and endocrine systems as well as in neuroimmunoendocrine communication. In this context, there is an age-related alteration of the physiological response to acute stress, which is modulated by catecholamine (CA), final products of the sympathetic-adreno-medullary axis. The involvement of CA in essential functions of the nervous system is consistent with the neuropsychological deficits found in mice with haploinsufficiency (hemizygous; HZ) of tyrosine hydroxylase (TH) enzyme (TH-HZ)...
January 13, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29288715/inflammation-and-neutrophil-immunosenescence-in-health-and-disease-targeted-treatments-to-improve-clinical-outcomes-in-the-elderly
#3
REVIEW
William Drew, Daisy V Wilson, Elizabeth Sapey
Despite increasing longevity, many old people are not in good health. There has been an increase in the prevalence of age-associated multi-morbidity (two or more chronic conditions in the same person). Also, severe infections, such as pneumonia, remain significant causes of mortality and morbidity in this aging group. Many chronic health conditions share risk factors such as increasing age, smoking, a sedentary life style and being part of a lower socioeconomic group. However, despite this, multi-morbidities often co-occur more commonly than would be predicted...
December 27, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29285399/fighting-against-a-protean-enemy-immunosenescence-vaccines-and-healthy-aging
#4
Giuseppe Del Giudice, Jörg J Goronzy, Beatrix Grubeck-Loebenstein, Paul-Henri Lambert, Tomas Mrkvan, Jeffrey J Stoddard, T Mark Doherty
The progressive increase of the aged population worldwide mandates new strategies to ensure sustained health and well-being with age. The development of better and/or new vaccines against pathogens that affect older adults is one pivotal intervention in approaching this goal. However, the functional decline of various physiological systems, including the immune system, requires novel approaches to counteract immunosenescence. Although important progress has been made in understanding the mechanisms underlying the age-related decline of the immune response to infections and vaccinations, knowledge gaps remain, both in the areas of basic and translational research...
2018: NPJ Aging and Mechanisms of Disease
https://www.readbyqxmd.com/read/29259496/immunosenescence-in-aging-between-immune-cells-depletion-and-cytokines-up-regulation
#5
REVIEW
Maria Teresa Ventura, Marco Casciaro, Sebastiano Gangemi, Rosalba Buquicchio
Background: The immunosenescence is a relatively recent chapter, correlated with the linear extension of the average life began in the nineteenth century and still in progress. The most important feature of immunosenescence is the accumulation in the "immunological space" of memory and effector cells as a result of the stimulation caused by repeated clinical and subclinical infections and by continuous exposure to antigens (inhalant allergens, food, etc.). This state of chronic inflammation that characterizes senescence has a significant impact on survival and fragility...
2017: Clinical and Molecular Allergy: CMA
https://www.readbyqxmd.com/read/29247791/immune-senescence-and-biomarkers-profile-of-bambu%C3%A3-aged-population-based-cohort
#6
Karen Cecília Lima Torres, Vitor Bortolo de Rezende, Maria Luiza Lima-Silva, Lorena Júnia de Souza Santos, Carla Gabriela Costa, Juliana Vaz de Melo Mambrini, Sérgio William Viana Peixoto, Eduardo Tarazona-Santos, Olindo Assis Martins Filho, Maria Fernanda Lima-Costa, Andréa Teixeira-Carvalho
During immunosenescence many proinflammatory markers such as cytokines and chemokines are increased. This process called by Franceschi and colleagues as inflammaging is associated with chronic inflammation and the ethiology and pathophysiolgy of many ageing diseases as Alzheimer's and atherosclerosis. The knowledge of immune profile during ageing may provide some interventions that would improve the immune function in elderly and quality of life for old people. However, the identification of a group of potential biomarkers to monitor the ageing process is very difficult...
December 13, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29242543/the-twilight-of-immunity-emerging-concepts-in-aging-of-the-immune-system
#7
REVIEW
Janko Nikolich-Žugich
Immunosenescence is a series of age-related changes that affect the immune system and, with time, lead to increased vulnerability to infectious diseases. This Review addresses recent developments in the understanding of age-related changes that affect key components of immunity, including the effect of aging on cells of the (mostly adaptive) immune system, on soluble molecules that guide the maintenance and function of the immune system and on lymphoid organs that coordinate both the maintenance of lymphocytes and the initiation of immune responses...
January 2018: Nature Immunology
https://www.readbyqxmd.com/read/29225343/advances-in-the-understanding-and-treatment-of-sepsis-induced-immunosuppression
#8
REVIEW
Fabienne Venet, Guillaume Monneret
Sepsis is defined as a life-threatening organ dysfunction that is caused by a dysregulated host response to infection. Sepsis can induce acute kidney injury and multiple organ failures and represents the most common cause of death in the intensive care unit. Sepsis initiates a complex immune response that varies over time, with the concomitant occurrence of both pro-inflammatory and anti-inflammatory mechanisms. As a result, most patients with sepsis rapidly display signs of profound immunosuppression, which is associated with deleterious consequences...
December 11, 2017: Nature Reviews. Nephrology
https://www.readbyqxmd.com/read/29209103/hiv-as-a-cause-of-immune-activation-and-immunosenescence
#9
REVIEW
T Sokoya, H C Steel, M Nieuwoudt, T M Rossouw
Systemic immune activation has emerged as an essential component of the immunopathogenesis of HIV. It not only leads to faster disease progression, but also to accelerated decline of overall immune competence. HIV-associated immune activation is characterized by an increase in proinflammatory mediators, dysfunctional T regulatory cells, and a pattern of T-cell-senescent phenotypes similar to those seen in the elderly. These changes predispose HIV-infected persons to comorbid conditions that have been linked to immunosenescence and inflamm-ageing, such as atherosclerosis and cardiovascular disease, neurodegeneration, and cancer...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29182479/vaccination-choices-for-older-people-looking-beyond-age-specific-approaches
#10
Richard Aspinall, Pierre Olivier Lang
To improve the ability of vaccines to protect older individuals we can no longer consider those over 65 years of age to be an homogenous population termed the "elderly" displaying a condition termed immunosenescence. Area Covered: The most recent figures from the US Census Bureau indicate that the global population exceeds 7,400 million. Of these more than 657 million are currently over 65, an age often designated by policy makers as permitting them access to concessions, pensions and social care benefits. But the spill-over consequences of these policies are the impact they have on access to different vaccine formulations...
November 28, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/29176992/immunosenescence-in-persons-with-spinal-cord-injury-in-relation-to-urinary-tract-infections-a-cross-sectional-study
#11
David Pavlicek, Jörg Krebs, Simona Capossela, Alessandro Bertolo, Britta Engelhardt, Jürgen Pannek, Jivko Stoyanov
Background: Individuals with a spinal cord injury (SCI), despite specialized rehabilitation and good health care, have a reduced life expectancy. Infectious diseases, such as pneumonias, infected pressure sores and urinary tract infections (UTI) have been identified as the leading causes of mortality. We hypothesise that a premature onset of immune frailty occurs in SCI, possibly caused also by recurrent urinary tract infections.A cross sectional study was performed comparing blood and urine samples between able bodied controls (n = 84) and persons with spinal cord injury (n = 85)...
2017: Immunity & Ageing: I & A
https://www.readbyqxmd.com/read/29172948/the-effect-of-frailty-on-hai-response-to-influenza-vaccine-among-community-dwelling-adults-%C3%A2-50%C3%A2-years-of-age
#12
Krissy K Moehling, Mary Patricia Nowalk, Chyongchiou Jeng Lin, Marnie Bertolet, Ted M Ross, Chalise E Carter, Michael Susick, Sean G Saul, A Murat Kaynar, Joyce T Bromberger, Richard K Zimmerman
The immune response to vaccine antigens is less robust in older adults because of changes in the aging immune system. Frailty, the multi-dimensional syndrome marked by losses in function and physiological reserve, is increasingly prevalent with advancing age. Frailty accelerates this immunosenescence but the consequence of frailty on immune response specific to influenza vaccine among older adults, is mixed. An observational, prospective study of 114 adults was conducted in the fall of 2013 to assess the association of physical frailty with immune response to standard dose influenza vaccine in community-dwelling adults ≥ 50 years of age...
November 27, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29165313/t-cell-differentiation-and-cd56-levels-in-polypoidal-choroidal-vasculopathy-and-neovascular-age-related-macular-degeneration
#13
Yousif Subhi, Marie Krogh Nielsen, Christopher Rue Molbech, Akio Oishi, Amardeep Singh, Mogens Holst Nissen, Torben Lykke Sørensen
Polypoidal choroidal vasculopathy (PCV) and neovascular age-related macular degeneration (AMD) are prevalent age-related diseases characterized by exudative changes in the macula. Although they share anatomical and clinical similarities, they are also distinctly characterized by their own features, e.g. vascular abnormalities in PCV and drusen-mediated progression in neovascular AMD. PCV remains etiologically uncharacterized, and ongoing discussion is whether PCV and neovascular AMD share the same etiology or constitute two substantially different diseases...
November 20, 2017: Aging
https://www.readbyqxmd.com/read/29161459/ageing-impairs-parasite-specific-antibody-responses-in-cystic-echinococcosis
#14
G Mourglia-Ettlin, S Miles, A Hernández, S Dematteis
Humoral immunity wanes during healthy ageing, increasing susceptibility to infections in the elderly. In this sense, information about parasite infections and human immunosenescence is scarce. Cystic echinococcosis (CE) is an infectious disease caused by the larval stage of the cestode parasite Echinococcus granulosus, whose prevalence in humans shows an increase with host age. Susceptibility to human CE has been associated with humoral immunity to some extent, and, therefore, we have here analysed the influence of host age on the serological profile of young, middle-aged and aged patients...
November 21, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/29142466/higher-pd-1-expression-concurrent-with-exhausted-cd8-t-cells-in-patients-with-de-novo-acute-myeloid-leukemia
#15
Jiaxiong Tan, Shaohua Chen, Yuhong Lu, Danlin Yao, Ling Xu, Yikai Zhang, Lijian Yang, Jie Chen, Jing Lai, Zhi Yu, Kanger Zhu, Yangqiu Li
Objective: To investigate the association between the T cell inhibitory receptor programmed death 1 (PD-1) and T cell exhaustion status in T cells from patients with de novo acute myeloid leukemia (AML) and AML in complete remission (CR). Methods: Surface expression of PD-1 and the exhaustion and immunosenescence markers CD244 and CD57 on CD3+, CD4+ and CD8+ T cells from peripheral blood samples from 20 newly diagnosed, untreated AML patients and 10 cases with AML in CR was analyzed by flow cytometry...
October 2017: Chinese Journal of Cancer Research, Chung-kuo Yen Cheng Yen Chiu
https://www.readbyqxmd.com/read/29141943/anemia-at-older-age-etiologies-clinical-implications-and-management
#16
Reinhard Stauder, Peter Valent, Igor Theurl
Anemia is quite frequently diagnosed in older individuals and is a key indicator of various reactive and clonal conditions. Many underlying diseases, like the myelodysplastic syndromes (MDS), develop preferentially in elderly individuals. The prevalence of anemia at older age is increasing, and this is mainly due to more frequently applied diagnostics and demographic changes in our societies. The etiology of anemia at older age is complex and ranges from bone marrow failure syndromes to chronic kidney disease, and from nutritional deficiencies to inflammatory processes including inflammaging in immunosenescence...
November 15, 2017: Blood
https://www.readbyqxmd.com/read/29133294/proinflammatory-t-cell-status-associated-with-early-life-adversity
#17
Martha M C Elwenspoek, Xenia Hengesch, Fleur A D Leenen, Anna Schritz, Krystel Sias, Violetta K Schaan, Sophie B Mériaux, Stephanie Schmitz, Fanny Bonnemberger, Hartmut Schächinger, Claus Vögele, Jonathan D Turner, Claude P Muller
Early life adversity (ELA) has been associated with an increased risk for diseases in which the immune system plays a critical role. The ELA immune phenotype is characterized by inflammation, impaired cellular immunity, and immunosenescence. However, data on cell-specific immune effects are largely absent. Additionally, stress systems and health behaviors are altered in ELA, which may contribute to the generation of the ELA immune phenotype. The present investigation tested cell-specific immune differences in relationship to the ELA immune phenotype, altered stress parameters, and health behaviors in individuals with ELA (n = 42) and those without a history of ELA (control, n = 73)...
November 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29124387/effects-of-lactobacillus-coryniformis-k8-cect5711-on-the-immune-response-to-influenza-vaccination-and-the-assessment-of-common-respiratory-symptoms-in-elderly-subjects-a-randomized-controlled-trial
#18
Juristo Fonollá, Carlos Gracián, Jose A Maldonado-Lobón, Carlos Romero, Alicia Bédmar, Juan C Carrillo, Carmen Martín-Castro, Antonio L Cabrera, Jose M García-Curiel, Carlos Rodríguez, Sara Sanbonmatsu, Mercedes Pérez-Ruiz, Jose M Navarro, Mónica Olivares
PURPOSE: Elderly people are particularly vulnerable to seasonal influenza. Therefore, vaccination is strongly recommended. However, the vaccine efficacy is lower in the elderly, owing to immunosenescence. The objective of the present study was to evaluate the ability of the probiotic strain Lactobacillus coryniformis K8 CECT5711 to enhance the immune response to the influenza vaccine in the elderly and to assess the effects on symptoms related to respiratory infections. METHODS: A randomized, double-blind, placebo-controlled trial was conducted between November 2015 and April 2016...
November 9, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/29111233/age-and-immunity-what-is-immunosenescence
#19
REVIEW
Graham Pawelec
As is apparent from the many contributions to this Special Issue of the Journal, the impact of age on immunity is nefarious, with all manner of dysregulated responses attributed to "immunosenescence". These range from poorer responses to vaccination, lower capacity to mediate anti-cancer responses, more inflammation and tissue damage, along with autoimmunity and loss of control of persistent infections. Given the grave clinical implications of altered immune status in aged people, it is of paramount importance to understand the nature of and mechanisms responsible for "immunosenescence"...
October 27, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29103899/perturbation-of-the-t-cell-receptor-repertoire-occurs-with-increasing-age-in-dogs
#20
Angela Holder, Samantha M Mirczuk, Robert C Fowkes, Donald B Palmer, Richard Aspinall, Brian Catchpole
Immunosenescence is the gradual deterioration in immune system function associated with ageing. This decline is partly due to involution of the thymus, which leads to a reduction in the output of naive T cells into the circulating lymphocyte pool. Expansion of existing naive and memory T cell populations, to compensate for the reduction in thymic output, can lead to reduced diversity in the T cell repertoire with increasing age, resulting in impairment of immune responses to novel antigenic challenges, such as during infection and vaccination...
October 28, 2017: Developmental and Comparative Immunology
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