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Annual Review of Immunology

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https://www.readbyqxmd.com/read/28182501/disorders-of-the-jak-stat-pathway-in-t-cell-lymphoma-pathogenesis-implications-for-immunotherapy
#1
Thomas A Waldmann, Jing Chen
Common gamma receptor-dependent cytokines and their JAK/STAT pathways play pivotal roles in T cell immunity. Abnormal activation of this system was pervasive in diverse T cell malignancies assessed by pSTAT3/pSTAT5 phosphorylation. Activating mutations were described in some but not all cases. JAK1 and STAT3 were required for proliferation and survival of these T cell lines whether or not JAKs or STATs were mutated. Activating JAK and STAT mutations were not sufficient to initiate leukemic cell proliferation but rather only augmented signals from upstream in the cytokine pathway...
February 9, 2017: Annual Review of Immunology
https://www.readbyqxmd.com/read/28142324/memory-b-cells-of-mice-and-humans
#2
Florian Weisel, Mark Shlomchik
Wecomprehensively review memory B cells (MBCs), covering the definition of MBC and their identities and subsets, how MBCs are generated, where they are localized, how they are maintained, and how they are reactivated. Whereas naive B cells adopt multiple fates upon stimulation, MBCs are more restricted in their responses. Evolving work reveals that the MBC compartment in mice and humans consists of distinct subpopulations with differing effector functions. We discuss the various approaches to define subsets and subset-specific roles...
January 30, 2017: Annual Review of Immunology
https://www.readbyqxmd.com/read/28142323/intracellular-nucleic-acid-detection-in-autoimmunity
#3
John T Crowl, Elizabeth E Gray, Kathleen Pestal, Hannah E Volkman, Daniel B Stetson
Protective immune responses to viral infection are initiated by innate immune sensors that survey extracellular and intracellular space for foreign nucleic acids. The existence of these sensors raises fundamental questions about self/nonself discrimination because of the abundance of self-DNA and self-RNA that occupy these same compartments. Recent advances have revealed that enzymes that metabolize or modify endogenous nucleic acids are essential for preventing inappropriate activation of the innate antiviral response...
January 30, 2017: Annual Review of Immunology
https://www.readbyqxmd.com/read/28142322/microbes-and-cancer
#4
Amiran Dzutsev, Jonathan H Badger, Ernesto Perez-Chanona, Soumen Roy, Rosalba Salcedo, Carolyne K Smith, Giorgio Trinchieri
Commensal microorganisms (the microbiota) live on all the surface barriers of our body and are particularly abundant and diverse in the distal gut. The microbiota and its larger host represent a metaorganism in which the cross talk between microbes and host cells is necessary for health, survival, and regulation of physiological functions locally, at the barrier level, and systemically. The ancestral molecular and cellular mechanisms stemming from the earliest interactions between prokaryotes and eukaryotes have evolved to mediate microbe-dependent host physiology and tissue homeostasis, including innate and adaptive resistance to infections and tissue damage...
January 30, 2017: Annual Review of Immunology
https://www.readbyqxmd.com/read/28142321/understanding-human-autoimmunity-and-autoinflammation-through-transcriptomics
#5
Romain Banchereau, Alma-Martina Cepika, Jacques Banchereau, Virginia Pascual
Transcriptomics, the high-throughput characterization of RNAs, has been instrumental in defining pathogenic signatures in human autoimmunity and autoinflammation. It enabled the identification of new therapeutic targets in IFN-, IL-1- and IL-17-mediated diseases. Applied to immunomonitoring, transcriptomics is starting to unravel diagnostic and prognostic signatures that stratify patients, track molecular changes associated with disease activity, define personalized treatment strategies, and generally inform clinical practice...
January 30, 2017: Annual Review of Immunology
https://www.readbyqxmd.com/read/28125358/immunobiology-of-long-noncoding-rnas
#6
Maninjay K Atianand, Daniel R Caffrey, Katherine A Fitzgerald
The discovery of long noncoding RNAs (lncRNA) has provided a new perspective on gene regulation in diverse biological contexts. lncRNAs are remarkably versatile molecules that interact with RNA, DNA, or proteins to promote or restrain the expression of protein-coding genes. Activation of immune cells is associated with dynamic changes in expression of genes, the products of which combat infectious microorganisms, initiate repair, and resolve inflammatory responses in cells and tissues. Recent evidence indicates that lncRNAs play important roles in directing the development of diverse immune cells and controlling the dynamic transcriptional programs that are a hallmark of immune cell activation...
January 11, 2017: Annual Review of Immunology
https://www.readbyqxmd.com/read/28125357/mucosal-ecological-network-of-epithelium-and-immune-cells-for-gut-homeostasis-and-tissue-healing
#7
Yosuke Kurashima, Hiroshi Kiyono
The intestinal epithelial barrier includes columnar epithelial, Paneth, goblet, enteroendocrine, and tuft cells as well as other cell populations, all of which contribute properties essential for gastrointestinal homeostasis. The intestinal mucosa is covered by mucin, which contains antimicrobial peptides and secretory IgA and prevents luminal bacteria, fungi, and viruses from stimulating intestinal immune responses. Conversely, the transport of luminal microorganisms-mediated by M, dendritic, and goblet cells-into intestinal tissues facilitates the harmonization of active and quiescent mucosal immune responses...
January 11, 2017: Annual Review of Immunology
https://www.readbyqxmd.com/read/28125356/the-biology-and-underlying-mechanisms-of-cross-presentation-of-exogenous-antigens-on-mhc-i-molecules
#8
Friedrich M Cruz, Jeff D Colbert, Elena Merino, Barry A Kriegsman, Kenneth L Rock
To monitor the health of cells, the immune system tasks antigen-presenting cells with gathering antigens from other cells and bringing them to CD8 T cells in the form of peptides bound to MHC-I molecules. Most cells would be unable to perform this function because they use their MHC-I molecules to exclusively present peptides derived from the cell's own proteins. However, the immune system evolved mechanisms for dendritic cells and some other phagocytes to sample and present antigens from the extracellular milieu on MHC-I through a process called cross-presentation...
January 11, 2017: Annual Review of Immunology
https://www.readbyqxmd.com/read/27912315/genetics-of-infectious-and-inflammatory-diseases-overlapping-discoveries-from-association-and-exome-sequencing-studies
#9
David Langlais, Nassima Fodil, Philippe Gros
Genome technologies have defined a complex genetic architecture in major infectious, inflammatory, and autoimmune disorders. High density marker arrays and Immunochips have powered genome-wide association studies (GWAS) that have mapped nearly 450 genetic risk loci in 22 major inflammatory diseases, including a core of common genes that play a central role in pathological inflammation. Whole-exome and whole-genome sequencing have identified more than 265 genes in which mutations cause primary immunodeficiencies and rare forms of severe inflammatory bowel disease...
December 1, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27912316/th2-cells-in-health-and-disease
#10
Toshinori Nakayama, Kiyoshi Hirahara, Atsushi Onodera, Yusuke Endo, Hiroyuki Hosokawa, Kenta Shinoda, Damon J Tumes, Yoshitaka Okamoto
Helper T (Th) cell subsets direct immune responses by producing signature cytokines. Th2 cells produce IL-4, IL-5, and IL-13, which are important in humoral immunity and protection from helminth infection and are central to the pathogenesis of many allergic inflammatory diseases. Molecular analysis of Th2 cell differentiation and maintenance of function has led to recent discoveries that have refined our understanding of Th2 cell biology. Epigenetic regulation of Gata3 expression by chromatin remodeling complexes such as Polycomb and Trithorax is crucial for maintaining Th2 cell identity...
November 28, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27860528/the-lymphatic-system-integral-roles-in-immunity
#11
Gwendalyn J Randolph, Stoyan Ivanov, Bernd H Zinselmeyer, Joshua P Scallan
The lymphatic vasculature is not considered a formal part of the immune system, but it is critical to immunity. One of its major roles is in the coordination of the trafficking of antigen and immune cells. However, other roles in immunity are emerging. Lymphatic endothelial cells, for example, directly present antigen or express factors that greatly influence the local environment. We cover these topics herein and discuss how other properties of the lymphatic vasculature, such as mechanisms of lymphatic contraction (which immunologists traditionally do not take into account), are nonetheless integral in the immune system...
November 14, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27168247/broadly-neutralizing-antibodies-to-hiv-and-their-role-in-vaccine-design
#12
Dennis R Burton, Lars Hangartner
HIV employs multiple means to evade the humoral immune response, particularly the elicitation of and recognition by broadly neutralizing antibodies (bnAbs). Such antibodies can act antivirally against a wide spectrum of viruses by targeting relatively conserved regions on the surface HIV envelope trimer spike. Elicitation of and recognition by bnAbs are hindered by the arrangement of spikes on virions and the relatively difficult access to bnAb epitopes on spikes, including the proximity of variable regions and a high density of glycans...
May 20, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27168246/tissue-tregs
#13
Marisella Panduro, Christophe Benoist, Diane Mathis
The immune system is responsible for defending an organism against the myriad of microbial invaders it constantly confronts. It has become increasingly clear that the immune system has a second major function: the maintenance of organismal homeostasis. Foxp3(+)CD4(+) regulatory T cells (Tregs) are important contributors to both of these critical activities, defense being the primary purview of Tregs circulating through lymphoid organs, and homeostasis ensured mainly by their counterparts residing in parenchymal tissues...
May 20, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27168245/exploiting-mucosal-immunity-for-antiviral-vaccines
#14
Akiko Iwasaki
Mucosal surfaces provide a remarkably effective barrier against potentially dangerous pathogens. Therefore, enhancing mucosal immunity through vaccines-strengthening that first line of defense-holds significant promise for reducing the burden of viral diseases. The large and varied class of viral pathogens, however, continues to present thorny challenges to vaccine development. Two primary difficulties exist: Viruses exhibit a stunning diversity of strategies for evading the host immune response, and even when we understand the nature of effective immune protection against a given virus, eliciting that protection is technically challenging...
May 20, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27168244/protein-kinase-c-enzymes-in-the-hematopoietic-and-immune-systems
#15
Amnon Altman, Kok-Fai Kong
The protein kinase C (PKC) family, discovered in the late 1970s, is composed of at least 10 serine/threonine kinases, divided into three groups based on their molecular architecture and cofactor requirements. PKC enzymes have been conserved throughout evolution and are expressed in virtually all cell types; they represent critical signal transducers regulating cell activation, differentiation, proliferation, death, and effector functions. PKC family members play important roles in a diverse array of hematopoietic and immune responses...
May 20, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27168243/fate-mapping-and-quantitation-of-hematopoiesis-in-vivo
#16
Thomas Höfer, Katrin Busch, Kay Klapproth, Hans-Reimer Rodewald
Hematopoietic stem cells (HSCs) and downstream progenitors have long been studied based on phenotype, cell purification, proliferation, and transplantation into myeloablated recipients. These experiments, complemented by data on expression profiles, mouse mutants, and humans with hematopoietic defects, are the foundation for the current hematopoietic differentiation tree. However, there are fundamental gaps in our knowledge of the quantitative and qualitative operation of the HSC/progenitor system under physiological and pathological conditions in vivo...
May 20, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27168242/retinoic-acid-and-retinoic-acid-receptors-as-pleiotropic-modulators-of-the-immune-system
#17
Alexandre Larange, Hilde Cheroutre
Vitamin A is a multifunctional vitamin implicated in a wide range of biological processes. Its control over the immune system and functions are perhaps the most pleiotropic not only for development but also for the functional fate of almost every cell involved in protective or regulatory adaptive or innate immunity. This is especially key at the intestinal border, where dietary vitamin A is first absorbed. Most effects of vitamin A are exerted by its metabolite, retinoic acid (RA), which through ligation of nuclear receptors controls transcriptional expression of RA target genes...
May 20, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27168241/heterogeneity-of-human-cd4-t-cells-against-microbes
#18
Federica Sallusto
CD4(+) T helper (Th) cells play a central role in the adaptive immune response by providing help to B cells and cytotoxic T cells and by releasing different types of cytokines in tissues to mediate protection against a wide range of pathogenic microorganisms. These functions are performed by different types of Th cells endowed with distinct migratory capacities and effector functions. Here we discuss how studies of the human T cell response to microbes have advanced our understanding of Th cell functional heterogeneity, in particular with the discovery of a distinct Th1 subset involved in the response to Mycobacteria and the characterization of two types of Th17 cells specific for extracellular bacteria or fungi...
May 20, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27168240/the-innate-lymphoid-cell-precursor
#19
Isabel E Ishizuka, Michael G Constantinides, Herman Gudjonson, Albert Bendelac
The discovery of tissue-resident innate lymphoid cell populations effecting different forms of type 1, 2, and 3 immunity; tissue repair; and immune regulation has transformed our understanding of mucosal immunity and allergy. The emerging complexity of these populations along with compounding issues of redundancy and plasticity raise intriguing questions about their precise lineage relationship. Here we review advances in mapping the emergence of these lineages from early lymphoid precursors. We discuss the identification of a common innate lymphoid cell precursor characterized by transient expression of the transcription factor PLZF, and the lineage relationships of innate lymphoid cells with conventional natural killer cells and lymphoid tissue inducer cells...
May 20, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27168239/mechanisms-of-pediatric-inflammatory-bowel-disease
#20
Joanna M Peloquin, Gautam Goel, Eduardo J Villablanca, Ramnik J Xavier
Inflammatory bowel disease (IBD), including Crohn disease and ulcerative colitis, is characterized by chronic intestinal inflammation due to a complex interaction of genetic determinants, disruption of mucosal barriers, aberrant inflammatory signals, loss of tolerance, and environmental triggers. Importantly, the incidence of pediatric IBD is rising, particularly in children younger than 10 years. In this review, we discuss the clinical presentation of these patients and highlight environmental exposures that may affect disease risk, particularly among people with a background genetic risk...
May 20, 2016: Annual Review of Immunology
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