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Immunosenescence

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https://www.readbyqxmd.com/read/27932110/effect-of-cytomegalovirus-infection-on-survival-of-older-kidney-transplant-patients-d-r-impact-of-valganciclovir-prophylaxis-versus-preemptive-therapy
#1
E Luna, F Caravaca, F Ferreira, N Fernandez, P Martín, M L Vargas, J Saenz de Santamaría, G Garcia Pino, L Azevedo, A Muñoz Sanz
BACKGROUND: Kidney transplant patients with D+/R+ serology can be treated with either prophylaxis or preemptive valganciclovir. The older transplant population suffers severe immunosenescence, especially patients with latent cytomegalovirus (CMV) infection (R+). They are more likely to develop indirect CMV effects. Likewise, many patients have significant cardiovascular comorbidity, which makes them more sensitive to these indirect effects. The aim of this study was to evaluate the incidence of CMV viremia and indirect effects on survival, comparing prophylaxis (V) against preemptive (P) valganciclovir in an older kidney transplant population...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27919492/corrigendum-to-immunologic-mechanisms-of-fingolimod-and-the-role-of-immunosenescence-in-the-risk-of-cryptococcal-infection-a-case-report-and-review-of-literature-mult-scler-relat-disord-9-2016-158-162
#2
Elena Grebenciucova, Anthony T Reder, Jacqueline T Bernard
No abstract text is available yet for this article.
November 2016: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/27907136/immune-activation-and-bacterial-translocation-a-link-between-impaired-immune-recovery-and-frequent-visceral-leishmaniasis-relapses-in-hiv-infected-patients
#3
Maria Luciana Silva-Freitas, Glaucia Fernandes Cota, Talia S Machado-de-Assis, Carmem Giacoia-Gripp, Ana Rabello, Alda M Da-Cruz, Joanna R Santos-Oliveira
The maintenance of chronic immune activation due to leishmaniasis or even due to microbial translocation is associated with immunosenescence and may contribute to frequent relapses. Our aim was to investigate whether patients with HIV-associated visceral leishmaniasis (VL/HIV) who experience a single episode of VL have different immunological behaviors in comparison to those who experience frequent relapses. VL/HIV patients were allocated to non-relapsing (NR, n = 6) and relapsing (R, n = 11) groups and were followed from the active phase of VL up to 12 months post-treatment (mpt)...
2016: PloS One
https://www.readbyqxmd.com/read/27903254/mir-96-mir-145-and-mir-9-expression-increases-and-igf-1r-and-foxo1-expression-decreases-in-peripheral-blood-mononuclear-cells-of-aging-humans
#4
Monika Budzinska, Magdalena Owczarz, Eliza Pawlik-Pachucka, Malgorzata Roszkowska-Gancarz, Przemyslaw Slusarczyk, Monika Puzianowska-Kuznicka
BACKGROUND: In mammals, the IGF-1 pathway affects the phenotype of aging. Since the function of the immune system is modulated by IGF-1, it is plausible that immunosenescence might in part result from altered control by this pathway. We therefore examined whether the expression of IGF-1R, FOXO1, and FOXO3a in peripheral blood mononuclear cells (PBMC) changes with age and if this might be due to changes in the expression of select miRNAs. METHODS: The expression of IGF-1R, FOXO1, FOXO3a, as well as of miR-9, miR-96, miR-99a, miR-132, miR-145, and miR-182 was examined in PBMC of young (27...
November 30, 2016: BMC Geriatrics
https://www.readbyqxmd.com/read/27885527/insights-into-mortality-patterns-and-causes-of-death-through-a-process-point-of-view-model
#5
James J Anderson, Ting Li, David J Sharrow
Process point of view (POV) models of mortality, such as the Strehler-Mildvan and stochastic vitality models, represent death in terms of the loss of survival capacity through challenges and dissipation. Drawing on hallmarks of aging, we link these concepts to candidate biological mechanisms through a framework that defines death as challenges to vitality where distal factors defined the age-evolution of vitality and proximal factors define the probability distribution of challenges. To illustrate the process POV, we hypothesize that the immune system is a mortality nexus, characterized by two vitality streams: increasing vitality representing immune system development and immunosenescence representing vitality dissipation...
November 24, 2016: Biogerontology
https://www.readbyqxmd.com/read/27879545/epstein-barr-virus-associated-mucocutaneous-ulcer-in-a-patient-with-t-cell-acute-lymphoblastic-leukemia-importance-of-accurate-diagnosis-and-conservative-management
#6
Anant Vatsayan, Ashish Gupta, Sanjay Ahuja, Rachel Egler, Rose C Beck, Yousif Matloub
Epstein-Barr virus-associated mucocutaneous ulcer (EBV-MCU) is a recently characterized entity that falls under the spectrum of EBV-lymphoproliferative disorders. First described in 2010 by Dojcinov et al, it is an EBV-driven localized proliferation of B cells, occurring in mucocutaneous tissues including the skin, the oropharynx, and the gastrointestinal tract of immunosuppressed patients in the absence of an intact T-cell repertoire. Typically, it has been described in elderly patients with age-related immunosenescence and patients who are on immunosuppressive therapy...
November 22, 2016: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/27876574/the-emerging-role-of-ecm-crosslinking-in-t-cell-mobility-as-a-hallmark-of-immunosenescence-in-humans
#7
REVIEW
Jean-Francois Moreau, Thomas Pradeu, Andrea GRignolio, Christine Nardini, Filippo Castiglione, Paolo Tieri, Miriam Capri, Stefano Salvioli, Jean-Luc Taupin, Paolo Garagnani, Claudio Franceschi
Immunosenescence is thought to result from cellular aging and to reflect exposure to environmental stressors and antigens, including cytomegalovirus (CMV). However, not all of the features of immunosenescence are consistent with this view, and this has led to the emergence of the sister theory of "inflammaging". The recently discovered diffuse tissue distribution of resident memory T cells (TRM) which don't recirculate, calls these theories into question. These cells account for most T cells residing in barrier epithelia which sit in and travel through the extracellular matrix (ECM)...
November 19, 2016: Ageing Research Reviews
https://www.readbyqxmd.com/read/27876197/vaccination-of-special-populations-protecting-the-vulnerable
#8
REVIEW
Mark Doherty, Ruprecht Schmidt-Ott, Jose Ignacio Santos, Lawrence R Stanberry, Annika M Hofstetter, Susan L Rosenthal, Anthony L Cunningham
One of the strategic objectives of the 2011-2020 Global Vaccine Action Plan is for the benefits of immunisation to be equitably extended to all people. This approach encompasses special groups at increased risk of vaccine-preventable diseases, such as preterm infants and pregnant women, as well as those with chronic and immune-compromising medical conditions or at increased risk of disease due to immunosenescence. Despite demonstrations of effectiveness and safety, vaccine uptake in these special groups is frequently lower than expected, even in developed countries with vaccination strategies in place...
December 20, 2016: Vaccine
https://www.readbyqxmd.com/read/27875822/cellular-senescence-immunosenescence-and-hiv
#9
Tamàs Fülöp, Georges Herbein, Andrea Cossarizza, Jacek M Witkowski, Eric Frost, Gilles Dupuis, Graham Pawelec, Anis Larbi
Aging is a complex biological process that leads to several physiological changes. Among these changes, the most striking are those involving the innate and adaptive parts of the immune system. Furthermore, these changes are associated with a low-grade inflammation called inflamm-aging, which is the result of several lifelong antigenic stimulations, including chronic viral infections such as cytomegalovirus. Immunosenescence, concomitantly with inflamm-aging, is considered as the leading cause of age-related diseases including cardiovascular, neurodegenerative and metabolic diseases, and cancer...
2017: Interdisciplinary Topics in Gerontology and Geriatrics
https://www.readbyqxmd.com/read/27867379/convergence-of-innate-and-adaptive-immunity-during-human-aging
#10
REVIEW
Branca I Pereira, Arne N Akbar
Aging is associated with profound changes in the human immune system, a phenomenon referred to as immunosenescence. This complex immune remodeling affects the adaptive immune system and the CD8(+) T cell compartment in particular, leading to the accumulation of terminally differentiated T cells, which can rapidly exert their effector functions at the expenses of a limited proliferative potential. In this review, we will discuss evidence suggesting that senescent αβCD8(+) T cells acquire the hallmarks of innate-like T cells and use recently acquired NK cell receptors as an alternative mechanism to mediate rapid effector functions...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27866236/effects-of-physical-exercise-on-markers-of-cellular-immunosenescence-a-systematic-review
#11
REVIEW
H Cao Dinh, I Beyer, T Mets, O O Onyema, R Njemini, W Renmans, M De Waele, K Jochmans, S Vander Meeren, I Bautmans
Aging affects negatively the immune system, defined as immunosenescence, which increases the susceptibility of elderly persons to infection, autoimmune disease, and cancer. There are strong indications that physical exercise in elderly persons may prevent the age-related decline in immune response without significant side effects. Consequently, exercise is being considered as a safe mode of intervention to reduce immunosenescence. The aim of this review was to appraise the existing evidence regarding the impact of exercise on surface markers of cellular immunosenescence in either young and old humans or animals...
November 19, 2016: Calcified Tissue International
https://www.readbyqxmd.com/read/27861555/p16ink4a-expression-and-immunologic-aging-in-chronic-hiv-infection
#12
Susan Pereira Ribeiro, Jeffrey M Milush, Edecio Cunha-Neto, Esper G Kallas, Jorge Kalil, Luiz Felipe D Passero, Peter W Hunt, Steven G Deeks, Douglas F Nixon, Devi SenGupta
Chronic HIV infection is characterized by increased immune activation and immunosenescence. p16 INK4a (p16) is a member of the cyclin-dependent kinase antagonist family that inhibits cellular proliferation, and its protein expression increases during normal chronological aging. However, some infectious diseases can increase the expression of this anti-proliferative protein, potentially accelerating immunological aging and dysfunction. In order to investigate the immunological aging in HIV patients, p16 protein expression was evaluated by flow cytometry, in T cell subsets in a cohort of chronically HIV-infected patients on and off ART as well as age-matched healthy controls...
2016: PloS One
https://www.readbyqxmd.com/read/27853459/immunosenescence-related-transcriptomic-and-immunologic-changes-in-older-individuals-following-influenza-vaccination
#13
Richard B Kennedy, Inna G Ovsyannikova, Iana H Haralambieva, Ann L Oberg, Michael T Zimmermann, Diane E Grill, Gregory A Poland
The goal of annual influenza vaccination is to reduce mortality and morbidity associated with this disease through the generation of protective immune responses. The objective of the current study was to examine markers of immunosenescence and identify immunosenescence-related differences in gene expression, gene regulation, cytokine secretion, and immunologic changes in an older study population receiving seasonal influenza A/H1N1 vaccination. Surprisingly, prior studies in this cohort revealed weak correlations between immunosenescence markers and humoral immune response to vaccination...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27824893/an-age-associated-decline-in-thymic-output-differs-in-dog-breeds-according-to-their-longevity
#14
Angela Holder, Stephanie Mella, Donald B Palmer, Richard Aspinall, Brian Catchpole
The age associated decline in immune function is preceded in mammals by a reduction in thymic output. Furthermore, there is increasing evidence of a link between immune competence and lifespan. One approach to determining thymic output is to quantify signal joint T cell receptor excision circles (sj-TRECs), a method which has been developed and used in several mammalian species. Life expectancy and the rate of aging vary in dogs depending upon their breed. In this study, we quantified sj-TRECs in blood samples from dogs of selected breeds to determine whether there was a relationship between longevity and thymic output...
2016: PloS One
https://www.readbyqxmd.com/read/27821203/ageing-alters-the-impact-of-nutrition-on-immune-function
#15
Parveen Yaqoob
Immunosenescence during ageing is a major challenge which weakens the ability of older individuals to respond to infection or vaccination. There has been much interest in dietary strategies to improve immunity in older people, but there is an assumption that modulation of the immune response in older people will be based on the same principles as for younger adults. Recent evidence suggests that ageing fundamentally alters the impact of nutrition on immune function. As a result, interpretation of data from studies investigating the impact of diet on immune function is highly dependent on subject age...
November 8, 2016: Proceedings of the Nutrition Society
https://www.readbyqxmd.com/read/27799351/inflammation-immune-activation-immunosenescence-and-hormonal-biomarkers-in-the-frailty-related-phenotype-of-men-with-or-at-risk-for-hiv
#16
Kristine M Erlandson, Derek Ng, Lisa P Jacobson, Joseph B Margolick, Adrian S Dobs, Frank J Palella, Jordan E Lake, Hanhvy Bui, Lawrence Kingsley, Todd T Brown
BACKGROUND:  The extent to which inflammation, immune activation/immunosenescence, and hormonal abnormalities are driven by HIV or frailty is not clear. METHODS:  HIV-infected frail men (n=155) were matched to non-frail, HIV-infected (n=141) and HIV-uninfected (n=150) men by age, calendar year, and antiretroviral therapy (ART) use (HIV only). Frailty was defined by ≥3 frailty-related phenotype criteria (weight loss, exhaustion, low activity, slowness) at ≥2 visits, or at 1 visit with ≥1 criteria at ≥2 visits...
October 31, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27782930/biological-and-chronological-age-in-heart-failure-role-of-immunosenescence
#17
Mitja Lainscak, Cristiana Vitale
No abstract text is available yet for this article.
December 2016: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/27775813/t-cell-phenotypes-predictive-of-frailty-and-mortality-in-elderly-nursing-home-residents
#18
Jennie Johnstone, Robin Parsons, Fernando Botelho, Jamie Millar, Shelly McNeil, Tamas Fulop, Janet E McElhaney, Melissa K Andrew, Stephen D Walter, P J Devereaux, Mehrnoush Malek, Ryan R Brinkman, Jonathan Bramson, Mark Loeb
OBJECTIVES: To determine whether immune phenotypes associated with immunosenescence are predictive of frailty and mortality within 1-year in elderly nursing home residents. DESIGN: Cross sectional study of frailty; prospective cohort study of mortality. SETTING: Thirty-two nursing homes in four Canadian cities between September 2009 and October 2011. PARTICIPANTS: Nursing home residents aged 65 and older (N = 1,072, median age 86, 72% female)...
October 24, 2016: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/27754273/sy-17-3-role-of-cmv-induced-t-cell-senescence-in-the-pathophysiology-of-cardiovascular-disease
#19
Jong-Chan Youn
Immunosenescence, defined as the age-associated dysregulation and dysfunction of the immune system, is characterized by impaired protective immunity and decreased efficacy of vaccines. Immunosenescence affects both the innate and adaptive immune systems; however, the most notable changes are in T cell immunity and include thymic involution, the collapse of T cell receptor (TCR) diversity, an imbalance in T cell populations, and the clonal expansion of senescent T cells. An increasing number of immunological, clinical and epidemiological studies suggest that persistent Cytomegalovirus (CMV) infection is associated with accelerated aging of the immune system and T cell immunosenescence especially...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754205/apsh-yi-04-expansion-of-immunosenescent-t-cell-fraction-in-chronic-kidney-disease-patients-exploring-new-pathogenic-mechanisms-of-increased-arterial-stiffness
#20
Jong-Chan Youn, Hee Tae Yu, Hyeon Chang Kim, Suk-Won Choi, Seong-Woo Han, Kyu-Hyung Ryu, Eui-Cheol Shin, Sungha Park
OBJECTIVE: Chronic kidney disease (CKD) is associated with increased arterial stiffness, which is a well-known predictor of future cardiovascular events. However, the underlying mechanism of arterial stiffening in CKD is not well known. Accelerated immune aging, characterized by expansion of immunosenescent T cell fraction might be involved in the pathogenesis of arterial stiffening in CKD. We aimed to evaluate the relationship between arterial stiffness and immunosenescent T cell (CD8CD57 or CD8CD28 T cell) fraction in patients with CKD...
September 2016: Journal of Hypertension
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