keyword
MENU ▼
Read by QxMD icon Read
search

Innate memory

keyword
https://www.readbyqxmd.com/read/28817118/altered-marginal-zone-and-innate-like-b-cells-in-aged-senescence-accelerated-samp8-mice-with-defective-igg1-responses
#1
Isabel Cortegano, Mercedes Rodríguez, Isabel Martín, Maria Carmen Prado, Carolina Ruíz, Rafael Hortigüela, Mario Alía, Marçal Vilar, Helena Mira, Eva Cano, Mercedes Domínguez, Belén de Andrés, María Luisa Gaspar
Aging has a strong impact on the activity of the immune system, enhancing susceptibility to pathogens and provoking a predominant pre-inflammatory status, whereas dampening responses to vaccines in humans and mice. Here, we demonstrate a loss of marginal zone B lymphocytes (MZ, CD19(+)CD45R(+)CD21(++)CD23(lo)) and a decrease of naive B cells (CD19(+)IgD(+)), whereas there is an enhancement of a CD19(+)CD45R(lo) innate-like B cell population (B1REL) and the so-called aged B cell compartment (ABC, CD45R(+)CD21(lo)CD23(lo)CD5(-)CD11b(-)) in aged senescence-accelerated (SAMP8) mice but not in aged senescence-resistant (SAMR1) mice...
August 17, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28815218/capturing-the-systemic-immune-signature-of-a-norovirus-infection-an-n-of-1-case-study-within-a-clinical-trial
#2
Antony J Cutler, Joao Oliveira, Ricardo C Ferreira, Ben Challis, Neil M Walker, Sarah Caddy, Jia Lu, Helen E Stevens, Deborah J Smyth, Marcin L Pekalski, Jane Kennet, Kara M D Hunter, Ian Goodfellow, Linda S Wicker, John A Todd, Frank Waldron-Lynch
BACKGROUND:  The infection of a participant with norovirus during the adaptive study of interleukin-2 dose on regulatory T cells in type 1 diabetes (DILT1D) allowed a detailed insight into the cellular and cytokine immune responses to this prevalent gastrointestinal pathogen. METHODS:  Serial blood, serum and peripheral blood mononuclear cell (PBMC) samples were collected pre-, and post-development of the infection. To differentiate between the immune response to norovirus and to control for the administration of a single dose of aldesleukin (recombinant interleukin-2, rIL-2) alone, samples from five non-infected participants administered similar doses were analysed in parallel...
2017: Wellcome Open Research
https://www.readbyqxmd.com/read/28809949/maturation-dependent-expression-of-aim2-in-human-b-cells
#3
Alexandra Svensson, Marianela Patzi Churqui, Kerstin Schlüter, Liza Lind, Kristina Eriksson
Intracellular DNA- and RNA-sensing receptors, such as the IFN-inducible protein Absent in Melanoma 2 (AIM2), serve as host sensors against a wide range of infections. Immune sensing and inflammasome activation by AIM2 has been implicated in innate antiviral recognition in many experimental systems using cell-lines and animal models. However, little is known about the expression and function of AIM2 in freshly isolated human cells. In this study we investigated the expression of AIM2 in different cell types derived from human cord and adult peripheral blood, in steady state and following in vitro-activation...
2017: PloS One
https://www.readbyqxmd.com/read/28807929/human-mucosal-associated-invariant-t-mait-cells-possess-capacity-for-b-cell-help
#4
Michael S Bennett, Shubhanshi Trivedi, Anita S Iyer, J Scott Hale, Daniel T Leung
Mucosal-associated invariant T (MAIT) cells are an innate-like T-cell subset, restricted by the nonclassic MHC class I-related protein MR1 and enriched at mucosal sites. Human studies have shown an association between MAIT cells and pathogen-specific antibody responses. In this study, we investigate the effect of human MAIT cells on B cells ex vivo. We found that supernatants from microbe- or cytokine-stimulated MAIT cells, when added to purified autologous B cells, increase frequencies of plasmablasts and promote IgA, IgG, and IgM production...
August 14, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28806274/transfusion-related-immunomodulation-a-reappraisal
#5
Lyla A Youssef, Steven L Spitalnik
PURPOSE OF REVIEW: This review summarizes current and prior observations regarding transfusion-related immunomodulation (TRIM) and puts these ideas into a modern immunological context, incorporating concepts from innate, adaptive, and nutritional immunity. We propose that TRIM research focus on determining whether there are specific, well-defined immunosuppressive effects from transfusing 'pure' red blood cells (RBCs) themselves, along with the by-products produced by the stored RBCs as a result of the 'storage lesion...
August 12, 2017: Current Opinion in Hematology
https://www.readbyqxmd.com/read/28804609/therapeutic-effects-of-ellagic-acid-on-memory-hippocampus-electrophysiology-deficits-and-elevated-tnf-%C3%AE-level-in-brain-due-to-experimental-traumatic-brain-injury
#6
Shahram Mashhadizadeh, Yaghoub Farbood, Mahin Dianat, Ali Khodadadi, Alireza Sarkaki
OBJECTIVES: Cognitive defects such as learning and memory impairment are amongst the most repetitious sequelae after sever and moderate traumatic brain injury (TBI). It was suggested that ellagic acid (EA), an innate phenol product, display neuroprotective properties against oxidative and inflammatory damages after brain injury. The object of the current study was therapeutic properties of EA on blood-brain barrier (BBB) interruption and elevated content of TNF-α in brain tissue followed by neurologic aftereffects, cognitive and brain electrophysiology deficits as outcomes of diffuse TBI in rat...
April 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28804462/heat-acclimation-mediated-cross-tolerance-origins-in-within-life-epigenetics
#7
REVIEW
Michal Horowitz
The primary outcome of heat acclimation is increased thermotolerance, which stems from enhancement of innate cytoprotective pathways. These pathways produce "ON CALL" molecules that can combat stressors to which the body has never been exposed, via cross-tolerance mechanisms (heat acclimation-mediated cross-tolerance-HACT). The foundation of HACT lies in the sharing of generic stress signaling, combined with tissue/organ- specific protective responses. HACT becomes apparent when acclimatory homeostasis is achieved, lasts for several weeks, and has a memory...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28798473/performance-on-innate-behaviour-during-early-development-as-a-function-of-stress-level
#8
Soojin Ryu, Rodrigo J De Marco
What is the relationship between the level of acute stress and performance on innate behaviour? The diversity of innate behaviours and lack of sufficient data gathered under the same experimental conditions leave this question unresolved. While evidence points to an inverted-U shaped relationship between the level of acute stress and various measures of learning and memory function, it is unknown the extent to which such a non-linear function applies to performance on innate behaviour, which develops without example or practice under natural circumstances...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28795800/prompt-and-robust-humoral-immunity-elicited-by-a-conjugated-chimeric-malaria-antigen-with-a-truncated-flagellin
#9
Fangxia Guo, Yong Dong Liu, Chun Zhang, Qi Wang, Lianyan Wang, Yuhui Gao, Jingxiu Bi, Heng Wang, Zhiguo Su
As one of the pathogen-associated molecular patterns (PAMPs), flagellin is recently utilized as a potent adjuvant for many subunit vaccines. In this study, a truncated flagellin (tFL) with deletion of the hypervariable regions was adopted as a carrier-adjuvant by chemical conjugation with a chimeric malaria antigen M.RCAg-1 (M312) via a hetero-bifunctional PEG linker. After boosting immunization in mice without any extra adjuvants, the M312-PEG-tFL conjugates elicited 100-1,000 times higher M312-specific antibody titers than M312, and 10-100 times higher than the physical mixture of M312 and tFL...
August 10, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28794018/redefining-memory-building-the-case-for-adaptive-nk-cells
#10
Silke Paust, Catherine A Blish, R Keith Reeves
Classically, natural killer (NK) cells have been defined by nonspecific innate killing of virus-infected and tumor cells. However, burgeoning evidence suggests that the functional repertoire of NK cells is far more diverse than has been previously appreciated, thus raising the possibility that there could be unexpected functional specialization and even adaptive capabilities among NK cell subpopulations. Some of the first evidence that NK cells respond in an antigen-specific fashion came from experiments revealing that subpopulations of murine NK cells could respond to a specific MCMV protein, and that in the absence of T and B cells, murine NK cells also mediated adaptive immune responses to a secondary challenge with specific haptens...
August 9, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28790368/signs-of-innate-immune-activation-and-premature-immunosenescence-in-psoriasis-patients
#11
Liisi Šahmatova, Elena Sügis, Marina Šunina, Helen Hermann, Ele Prans, Maire Pihlap, Kristi Abram, Ana Rebane, Hedi Peterson, Pärt Peterson, Külli Kingo, Kai Kisand
Psoriasis is a chronic inflammatory disease that affects skin and is associated with systemic inflammation and many serious comorbidities ranging from metabolic syndrome to cancer. Important discoveries about psoriasis pathogenesis have enabled the development of effective biological treatments blocking the T helper 17 pathway. However, it has not been settled whether psoriasis is a T cell-mediated autoimmune disease or an autoinflammatory disorder that is driven by exaggerated innate immune signalling. Our comparative gene expression and hierarchical cluster analysis reveal important gene circuits involving innate receptors...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28783663/memory-phenotype-cd4-t-cells-spontaneously-generated-under-steady-state-conditions-exert-innate-th1-like-effector-function
#12
Takeshi Kawabe, Dragana Jankovic, Shuko Kawabe, Yuefeng Huang, Ping-Hsien Lee, Hidehiro Yamane, Jinfang Zhu, Alan Sher, Ronald N Germain, William E Paul
Conventional CD4(+) T cells are composed of naïve, pathogen-specific memory, and pathogen-independent memory-phenotype (MP) cells under steady state. Naïve and pathogen-specific memory cells play key roles in adaptive immunity, whereas the homeostatic mechanisms regulating the generation of MP cells and their biological functions are unclear. We show that MP cells are autonomously generated from peripheral naïve cells in the absence of infectious stimulation in a T cell receptor (TCR)- and CD28-dependent manner...
June 16, 2017: Science Immunology
https://www.readbyqxmd.com/read/28781750/natural-killer-cells-in-herpesvirus-infections
#13
REVIEW
Christian Münz, Obinna Chijioke
Natural killer (NK) cells are potent innate cytotoxic lymphocytes for the destruction of infected and transformed cells. Although they were originally considered to be ready-made assassins after their hematopoietic development, it has recently become clear that their activity is regulated by mechanisms such as repertoire composition, licensing, priming, and adaptive memory-like differentiation. Some of these mechanisms are influenced by infectious disease agents, including herpesviruses. In this review, we will compare expansion, stimulation, and effector functions of NK cell populations after infections with β- and γ 1-herpesviruses because, though closely related, these pathogens seem to drive completely opposite NK cell responses...
2017: F1000Research
https://www.readbyqxmd.com/read/28768856/non-encapsidated-5-copy-back-defective-interfering-genomes-produced-by-recombinant-measles-viruses-are-recognized-by-rig-i-and-lgp2-but-not-mda5
#14
Marie Mura, Chantal Combredet, Valérie Najburg, Raul Y Sanchez David, Frédéric Tangy, Anastassia V Komarova
Attenuated Measles virus (MV) is one of the most effective and safe vaccine available, making it an attractive candidate vector to prevent other infectious diseases. Yet the great capacity of this vaccine still needs to be understood at the molecular level. MV vaccine strains have different type-I interferon-inducing abilities, that partially depend on the presence of 5' copy-back defective interfering genomes (DI-RNAs). DI-RNAs are pathogen associated molecular patterns recognized by RIG-I-like receptors (RLRs: RIG-I, MDA5 and LGP2) that activate innate immune signalling and shape the adaptive immune response...
August 2, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28768726/cutting-edge-2b4-mediated-coinhibition-of-cd4-t-cells-underlies-mortality-in-experimental-sepsis
#15
Ching-Wen Chen, Rohit Mittal, Nathan J Klingensmith, Eileen M Burd, Cox Terhorst, Greg S Martin, Craig M Coopersmith, Mandy L Ford
Sepsis is a leading cause of death in the United States, but the mechanisms underlying sepsis-induced immune dysregulation remain poorly understood. 2B4 (CD244, SLAM4) is a cosignaling molecule expressed predominantly on NK cells and memory CD8(+) T cells that has been shown to regulate T cell function in models of viral infection and autoimmunity. In this article, we show that 2B4 signaling mediates sepsis lymphocyte dysfunction and mortality. 2B4 expression is increased on CD4(+) T cells in septic animals and human patients at early time points...
August 2, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28760882/modified-vaccinia-virus-ankara-vector-induces-specific-cellular-and-humoral-responses-in-the-female-reproductive-tract-the-main-hiv-portal-of-entry
#16
Romain Marlin, Marie-Thérèse Nugeyre, Nicolas Tchitchek, Matteo Parenti, Hakim Hocini, Fahd Benjelloun, Claude Cannou, Nathalie Dereuddre-Bosquet, Yves Levy, Françoise Barré-Sinoussi, Gabriella Scarlatti, Roger Le Grand, Elisabeth Menu
The female reproductive tract (FRT) is one of the major mucosal invasion sites for HIV-1. This site has been neglected in previous HIV-1 vaccine studies. Immune responses in the FRT after systemic vaccination remain to be characterized. Using a modified vaccinia virus Ankara (MVA) as a vaccine model, we characterized specific immune responses in all compartments of the FRT of nonhuman primates after systemic vaccination. Memory T cells were preferentially found in the lower tract (vagina and cervix), whereas APCs and innate lymphoid cells were mainly located in the upper tract (uterus and fallopian tubes)...
July 31, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28751257/maternal-inflammation-induces-immune-activation-of-fetal-microglia-and-leads-to-disrupted-microglia-immune-responses-behavior-and-learning-performance-in-adulthood
#17
Wandert Schaafsma, Laura Bozal Basterra, Sabrina Jacobs, Nieske Brouwer, Peter Meerlo, Anne Schaafsma, Erik W G M Boddeke, Bart J L Eggen
Maternal inflammation during pregnancy can have detrimental effects on embryonic development that persist during adulthood. However, the underlying mechanisms and insights in the responsible cell types are still largely unknown. Here we report the effect of maternal inflammation on fetal microglia, the innate immune cells of the central nervous system (CNS). In mice, a challenge with LPS during late gestation stages (days 15-16-17) induced a pro-inflammatory response in fetal microglia. Adult whole brain microglia of mice that were exposed to LPS during embryonic development displayed a persistent reduction in pro-inflammatory activation in response to a re-challenge with LPS...
July 24, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28749614/dissecting-the-dynamics-of-trans-generational-immune-priming
#18
Joachim Kurtz, Sophie A O Armitage
The transfer of immunity from mother to offspring is a central way to endow the offspring with increased protection against pathogens. This phenomenon is not only found within the vertebrate domain: in some circumstances, invertebrate mothers can also give their offspring an immune kick-start, which is termed trans-generational immune priming (TGIP). TGIP has been uncovered for a number of invertebrate species, but it is not ubiquitously evident. The reasons for which are not known. In this issue of Molecular Ecology, Tate, Andolfatto, Demuth, and Graham () probe the molecular underpinnings of TGIP in concert with the temporal dynamics of the response in the red flour beetle, Tribolium castaneum, infected with the bacterium Bacillus thuringiensis (Figure )...
August 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28744287/ccr6-deficiency-impairs-iga-production-and-dysregulates-antimicrobial-peptide-production-altering-the-intestinal-flora
#19
Ya-Lin Lin, Peng-Peng Ip, Fang Liao
Intestinal immunity exists as a complex relationship among immune cells, epithelial cells, and microbiota. CCR6 and its ligand-CCL20 are highly expressed in intestinal mucosal tissues, such as Peyer's patches (PPs) and isolated lymphoid follicles (ILFs). In this study, we investigated the role of the CCR6-CCL20 axis in intestinal immunity under homeostatic conditions. CCR6 deficiency intrinsically affects germinal center reactions in PPs, leading to impairments in IgA class switching, IgA affinity, and IgA memory B cell production and positioning in PPs, suggesting an important role for CCR6 in T-cell-dependent IgA generation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28742882/t-cell-intrinsic-tlr2-stimulation-promotes-il-10-expression-and-suppressive-activity-by-cd45rbhi-t-cells
#20
Janice C Jun, Mark B Jones, Douglas M Oswald, Edward S Sim, Amruth R Jonnalagadda, Lori S C Kreisman, Brian A Cobb
While Toll-like receptors (TLRs) represent one of the best characterized innate immune pathways, evidence suggests that TLRs are not restricted to innate leukocytes and some epithelial cells, but are also expressed in T cells. Specifically, published evidence focusing on FoxP3+ regulatory T cells demonstrate that they express functional TLR2, which is already known among the TLR family for its association with immune suppression; however, little is known about the relationship between T cell-intrinsic TLR2 binding and cytokine production, T cell differentiation, or T cell receptor (TCR) stimulation...
2017: PloS One
keyword
keyword
45710
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"