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Adaptive immunity

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https://www.readbyqxmd.com/read/28214990/interactions-between-mesenchymal-stem-cells-and-the-immune-system
#1
REVIEW
Na Li, Jinlian Hua
In addition to being multi-potent, mesenchymal stem cells (MSCs) possess immunomodulatory functions that have been investigated as potential treatments in various immune disorders. MSCs can robustly interact with cells of the innate and adaptive immune systems, either through direct cell-cell contact or through their secretome. In this review, we discuss current findings regarding the interplay between MSCs and different immune cell subsets. We also draw attention to the mechanisms involved.
February 18, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28214857/epigenetic-alterations-in-cellular-immunity-new-insights-into-autoimmune-diseases
#2
Zijun Wang, Qianjin Lu, Zhihui Wang
Epigenetic modification is an additional regulator in immune responses as the genome-wide profiling somehow fails to explain the sophisticated mechanisms in autoimmune diseases. The effect of epigenetic modifications on adaptive immunity derives from their regulations to induce a permissive or negative gene expression. Epigenetic events, such as DNA methylation, histone modifications and microRNAs (miRNAs) are often found in T cell activation, differentiation and commitment which are the major parts in cellular immunity...
February 8, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214610/virosome-bound-antigen-enhances-dc-dependent-specific-cd4-t-cell-stimulation-inducing-a-th1-and-treg-profile-in-vitro
#3
Rebecca A M Blom, Mario Amacker, Christian Moser, R Maarten van Dijk, Raffaela Bonetti, Emilie Seydoux, Sean R R Hall, Christophe von Garnier, Fabian Blank
There is considerable interest to develop antigen-carriers for immune-modulatory clinical applications, but insufficient information is available on their effects on antigen-presenting cells. We employed virosomes coupled to ovalbumin (OVA) to study their interaction with murine bone marrow-derived dendritic cells (BMDCs) and modulation of downstream T cell responses. BMDCs were treated in vitro with virosomes or liposomes prior to determining BMDC phenotype, viability, and intra-cellular trafficking. Antigen-specific CD4(+) T cell activation was measured by co-culture of BMDCs with DO11...
February 15, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28214467/paxillin-a-crossroad-in-pathological-cell-migration
#4
REVIEW
Ana María López-Colomé, Irene Lee-Rivera, Regina Benavides-Hidalgo, Edith López
Paxilllin is a multifunctional and multidomain focal adhesion adapter protein which serves an important scaffolding role at focal adhesions by recruiting structural and signaling molecules involved in cell movement and migration, when phosphorylated on specific Tyr and Ser residues. Upon integrin engagement with extracellular matrix, paxillin is phosphorylated at Tyr31, Tyr118, Ser188, and Ser190, activating numerous signaling cascades which promote cell migration, indicating that the regulation of adhesion dynamics is under the control of a complex display of signaling mechanisms...
February 18, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28214099/lymph-node-stroma-dynamics-and-approaches-for-their-visualization
#5
REVIEW
Rebecca Gentek, Marc Bajénoff
Lymphoid stromal cells are best known as the architectural cells of lymphoid organs. For decades, they have been considered as inert elements of the immune system but this view has changed dramatically in recent years, when it was discovered that they are endowed with critical immunoregulatory functions. It is now accepted that without them, the adaptive immune response would be compromised, if not abrogated entirely. Here, we review the function of the major lymphoid stromal cell types; the way they remodel upon inflammation; discuss the available tools to track their behavior; and introduce several methodological approaches that we believe will help improving our knowledge of these pivotal cell types...
February 14, 2017: Trends in Immunology
https://www.readbyqxmd.com/read/28213733/the-localization-of-a-heterologous-displayed-antigen-in-the-baculovirus-budded-virion-determines-the-type-and-strength-of-induced-adaptive-immune-response
#6
Eugenia Tavarone, Guido Nicolás Molina, Sabrina Amalfi, Andrea Peralta, Paula Molinari, Oscar Taboga
In the search of strategies of presentation of heterologous antigens to elicit humoral or cellular immune responses that modulate and properly potentiate each type of response, researchers have been studying baculovirus (BV) as vaccine vectors with promising results. For some years, several research groups explored different antigen presentation approaches using the BV AcNPV by expressing polypeptides on the surface of budded virions or by de novo synthesis of heterologous antigens by transduction of mammalian cells...
February 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28213726/pd-1-and-pd-l1-antibodies-in-cancer-current-status-and-future-directions
#7
REVIEW
Arjun Vasant Balar, Jeffrey S Weber
Immunotherapy has moved to the center stage of cancer treatment with the recent success of trials in solid tumors with PD-1/PD-L1 axis blockade. Programmed death-1 or PD-1 is a checkpoint molecule on T cells that plays a vital role in limiting adaptive immune responses and preventing autoimmune and auto-inflammatory reactivity in the normal host. In cancer patients, PD-1 expression is very high on T cells in the tumor microenvironment, and PD-L1, its primary ligand, is variably expressed on tumor cells and antigen-presenting cells within tumors, providing a potent inhibitory influence within the tumor microenvironment...
February 17, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28213473/central-role-of-t-helper-17-cells-in-chronic-hypoxia-induced-pulmonary-hypertension
#8
Levi D Maston, David T Jones, Wieslawa Giermakowska, Tamara A Howard, Judy L Cannon, Wei Wang, Yongyi Wei, Weimin Xuan, Thomas C Resta, Laura V Gonzalez Bosc
RATIONALE: Inflammation is a prominent pathologic feature in pulmonary arterial hypertension as demonstrated by pulmonary vascular infiltration of inflammatory cells, including T and B lymphocytes. However, the contribution of the adaptive immune system is not well characterized in pulmonary hypertension caused by chronic hypoxia. CD4(+) T cells are required for initiating and maintaining inflammation, suggesting these cells could play an important role in the pathogenesis of hypoxic pulmonary hypertension...
February 17, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28213330/drug-discovery-strategies-in-the-field-of-tumor-energy-metabolism-limitations-by-metabolic-flexibility-and-metabolic-resistance-to-chemotherapy
#9
REVIEW
N D Amoedo, E Obre, R Rossignol
The search for new drugs capable of blocking the metabolic vulnerabilities of human tumors has now entered the clinical evaluation stage, but several projects already failed in phase I or phase II. In particular, very promising in vitro studies could not be translated in vivo at preclinical stage and beyond. This was the case for most glycolysis inhibitors that demonstrated systemic toxicity. A more recent example is the inhibition of glutamine catabolism in lung adenocarcinoma that failed in vivo despite a strong addiction of several cancer cell lines to glutamine in vitro...
February 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28212948/the-importance-of-the-glycosylation-of-antimicrobial-peptides-natural-and-synthetic-approaches
#10
REVIEW
Natalia G Bednarska, Brendan W Wren, Sam J Willcocks
Glycosylation is one of the most prevalent post-translational modifications of a protein, with a defining impact on its structure and function. Many of the proteins involved in the innate or adaptive immune response, including cytokines, chemokines, and antimicrobial peptides (AMPs), are glycosylated, contributing to their myriad activities. The current availability of synthetic coupling and glycoengineering technology makes it possible to customise the most beneficial glycan modifications for improved AMP stability, microbicidal potency, pathogen specificity, tissue or cell targeting, and immunomodulation...
February 14, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28212924/ibd-immunopathogenesis-a-comprehensive-review-of-inflammatory-molecules
#11
REVIEW
Jae Hyon Park, Laurent Peyrin-Biroulet, Michael Eisenhut, Jae Il Shin
Inflammatory molecules play a crucial role in the pathogenesis of inflammatory bowel disease (IBD) such as ulcerative colitis and Crohn's disease, both of which are chronic inflammatory conditions of the gastrointestinal tract. Abnormal expressions of pro-and anti-inflammatory molecules have been described to cause an imbalance to the gut innate and adaptive immunity, and recently a large portion of research in IBD has been geared towards identifying novel molecules that may be used as potential therapeutic targets...
February 14, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/28212890/annexin-a1-influences-in-breast-cancer-controversies-on-contributions-to-tumour-host-and-immunoediting-processes
#12
REVIEW
Yan Tu, Cameron N Johnstone, Alastair G Stewart
Annexin A1 is a multifunctional protein characterised by its actions in modulating the innate and adaptive immune response. Accumulating evidence of altered annexin A1 expression in many human tumours raises interest in its functional role in cancer biology. In breast cancer, altered annexin A1 expression levels suggest a potential influence on tumorigenic and metastatic processes. However, reports of conflicting results reveal a relationship that is much more complex than first conceptualised. In this review, we explore the diverse actions of annexin A1 on breast tumour cells and various host cell types, including stromal immune and structural cells, particularly in the context of cancer immunoediting...
February 14, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28212734/role-of-granule-proteases-in-the-life-and-death-of-neutrophils
#13
REVIEW
Charaf Benarafa, Hans-Uwe Simon
Neutrophils constitute a crucial component of the innate immune defenses against microbes. Produced in the bone marrow and patrolling in blood vessels, neutrophils are recruited to injured tissues and are immediately active to contain pathogen invasion. Neutrophils undergo programmed cell death by multiple, context-specific pathways, which have consequences on immunopathology and disease outcome. Studies in the last decade indicate additional functions for neutrophils - or a subset of neutrophils - in modulating adaptive responses and tumor progression...
January 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28212624/understanding-the-response-to-endurance-exercise-using-a-systems-biology-approach-combining-blood-metabolomics-transcriptomics-and-mirnomics-in-horses
#14
Núria Mach, Yuliaxis Ramayo-Caldas, Allison Clark, Marco Moroldo, Céline Robert, Eric Barrey, Jesús Maria López, Laurence Le Moyec
BACKGROUND: Endurance exercise in horses requires adaptive processes involving physiological, biochemical, and cognitive-behavioral responses in an attempt to regain homeostasis. We hypothesized that the identification of the relationships between blood metabolome, transcriptome, and miRNome during endurance exercise in horses could provide significant insights into the molecular response to endurance exercise. For this reason, the serum metabolome and whole-blood transcriptome and miRNome data were obtained from ten horses before and after a 160 km endurance competition...
February 17, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28212439/correction-type-i-interferon-receptor-deficiency-in-dendritic-cells-facilitates-systemic-murine-norovirus-persistence-despite-enhanced-adaptive-immunity
#15
Timothy J Nice, Lisa C Osborne, Vesselin T Tomov, David Artis, E John Wherry, Herbert W Virgin
[This corrects the article DOI: 10.1371/journal.ppat.1005684.].
February 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28211194/a-field-reciprocal-transplant-experiment-reveals-asymmetric-costs-of-migration-between-lake-and-river-ecotypes-of-three-spined-sticklebacks-gasterosteus-aculeatus
#16
Joshka Kaufmann, Tobias L Lenz, Martin Kalbe, Manfred Milinski, Christophe Eizaguirre
Theory of local adaptation predicts that non-adapted migrants will suffer increased costs compared to local residents. Ultimately this process can result in the reduction of gene flow and culminate in speciation. Here, we experimentally investigated the relative fitness of migrants in foreign habitats, focusing on diverging lake and river ecotypes of three-spined sticklebacks. A reciprocal transplant experiment performed in the field revealed asymmetric costs of migration: while mortality of river fish was increased under lake conditions, lake migrants suffered from reduced growth relative to river residents...
February 17, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28209996/transient-cannabinoid-receptor-2-blockade-during-immunization-heightens-intensity-and-breadth-of-antigen-specific-antibody-responses-in-young-and-aged-mice
#17
Emmanuel Dotsey, Irina Ushach, Egest Pone, Rie Nakajima, Algis Jasinskas, Donovan A Argueta, Andrea Dillon, Nicholas DiPatrizio, Huw Davies, Albert Zlotnik, Peter D Crompton, Philip L Felgner
The hallmark of vaccines is their ability to prevent the spread of infectious pathogens and thereby serve as invaluable public health tool. Despite their medical relevance, there is a gap in our understanding of the physiological factors that mediate innate and adaptive immune response to vaccines. The endocannabinoid (eCB) system is a critical modulator of homeostasis in vertebrates. Our results indicate that macrophages and dendritic cells produce the endocannabinoid, 2-arachidonoyl-sn-glycerol (2-AG) upon antigen activation...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28209780/microtubule-associated-protein-4-map4-controls-nanovesicle-dynamics-and-t-cell-activation
#18
Eugenio Bustos-Morán, Noelia Blas-Rus, Noa Martin-Cófreces, Francisco Sánchez-Madrid
The Immune Synapse (IS) is a specialized structure formed at the contact area between T lymphocytes and antigen-presenting cells (APC), essential for the adaptive immune response. Proper T cell activation requires its polarization towards the APC, which is highly dependent on the tubulin cytoskeleton. Microtubule associated protein-4 (MAP4) is a microtubule (MT)-stabilizing protein that controls MTs in physiological processes such as cell division, migration, vesicular transport or primary cilia formation. In this study, we have assessed the role of MAP4 in T cell activation...
February 16, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28209587/genome-surgery-using-cas9-ribonucleoproteins-for-the-treatment-of-age-related-macular-degeneration
#19
Kyoungmi Kim, Sung Wook Park, Jin Hyoung Kim, Seung Hwan Lee, Daesik Kim, Taeyoung Koo, Kwang-Eun Kim, Jeong Hun Kim, Jin-Soo Kim
RNA-guided genome surgery using CRISPR-Cas9 nucleases has shown promise for the treatment of diverse genetic diseases. Yet, the potential of such nucleases for therapeutic applications in nongenetic diseases is largely unexplored. Here, we focus on age-related macular degeneration (AMD), a leading cause of blindness in adults, which is associated with retinal overexpression of, rather than mutations in, the VEGFA gene. Subretinal injection of preassembled, Vegfa gene-specific Cas9 ribonucleoproteins (RNPs) into the adult mouse eye gave rise to mutagenesis at the target site in the retinal pigment epithelium...
February 16, 2017: Genome Research
https://www.readbyqxmd.com/read/28209402/chemokine-receptor-patterns-and-right-heart-failure-in-mechanical-circulatory-support
#20
Aditi Nayak, Colin Neill, Robert L Kormos, Luigi Lagazzi, Indrani Halder, Charles McTiernan, Jennifer Larsen, Ana Inashvili, Jeffrey Teuteberg, Timothy N Bachman, Karen Hanley-Yanez, Dennis M McNamara, Marc A Simon
BACKGROUND: Right ventricular failure (RVF) complicates 9% to 44% of left ventricular assist device (LVAD) implants post-operatively. Current prediction scores perform only modestly in validation studies, and do not include immune markers. Chemokines are inflammatory signaling molecules with a fundamental role in cardiac physiology and stress adaptation. In this study we investigated chemokine receptor regulation in LVAD recipients who develop RVF. METHODS: Expression of chemokine receptor (CCR) genes 3 to 8 were examined in the peripheral blood of 111 LVAD patients, collected 24 hours before implant...
December 23, 2016: Journal of Heart and Lung Transplantation
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