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https://www.readbyqxmd.com/read/28523126/transforming-growth-factor-%C3%AE-a-master-regulator-of-the-gut-microbiota-and-immune-cell-interactions
#1
REVIEW
David Bauché, Julien C Marie
The relationship between host organisms and their microbiota has co-evolved towards an inter-dependent network of mutualistic interactions. This interplay is particularly well studied in the gastrointestinal tract, where microbiota and host immune cells can modulate each other directly, as well as indirectly, through the production and release of chemical molecules and signals. In this review, we define the functional impact of transforming growth factor-beta (TGF-β) on this complex interplay, especially through its modulation of the activity of local regulatory T cells (Tregs), type 17 helper (Th17) cells, innate lymphoid cells (ILCs) and B cells...
April 2017: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28518119/analysis-of-cell-suspensions-isolated-from-solid-tissues-by-spectral-flow-cytometry
#2
Sandrine Schmutz, Mariana Valente, Ana Cumano, Sophie Novault
Flow cytometry has been used for the past 40 years to define and analyze the phenotype of lymphoid and other hematopoietic cells. Initially restricted to the analysis of a few fluorochromes, currently there are dozens of different fluorescent dyes, and up to 14-18 different dyes can be combined at a time. However, several limitations still impair the analytical capabilities. Because of the multiplicity of fluorescent probes, data analysis has become increasingly complex due to the need of large, multi-parametric compensation matrices...
May 5, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28508352/pediatric-precursor-b-acute-lymphoblastic-leukemia-are-t-helper-cells-the-missing-link-in-the-infectious-etiology-theory
#3
REVIEW
Simone Bürgler, David Nadal
Precursor B acute lymphoblastic leukemia (BCP-ALL), the most common childhood malignancy, arises from an expansion of malignant B cell precursors in the bone marrow. Epidemiological studies suggest that infections or immune responses to infections may promote such an expansion and thus BCP-ALL development. Nevertheless, a specific pathogen responsible for this process has not been identified. BCP-ALL cells critically depend on interactions with the bone marrow microenvironment. The bone marrow is also home to memory T helper (Th) cells that have previously expanded during an immune response in the periphery...
December 2017: Molecular and Cellular Pediatrics
https://www.readbyqxmd.com/read/28501894/influence-of-ageing-on-the-microarchitecture-of-the-spleen-and-lymph-nodes
#4
REVIEW
Vivian M Turner, Neil A Mabbott
The elderly have a decreased response to vaccination and an increased susceptibility to infectious diseases. The spleen and lymph nodes are important secondary lymphoid organs where immune cells can rapidly respond to pathogenic material in the blood and lymph in order to mount long-term adaptive immune responses to those pathogens. In aged mice and humans structural changes occur to both the spleen and lymph nodes. These structural changes affect the functioning of the immune cells within, which may ultimate result in less effective or decreased immune responses...
May 13, 2017: Biogerontology
https://www.readbyqxmd.com/read/28497429/pathogenesis-and-fdg-pet-ct-findings-of-epstein-barr-virus-related-lymphoid-neoplasms
#5
REVIEW
Akira Toriihara, Reiko Nakajima, Ayako Arai, Masashi Nakadate, Koichiro Abe, Kazunori Kubota, Ukihide Tateishi
Epstein-Barr virus (EBV) is one of the most common viruses, infecting more than 90% of the adult population worldwide. EBV genome is detected in some lymphoid neoplasms. Not only their histopathological subtypes, but also their backgrounds and their clinical courses are variable. A number of B-cell lymphoproliferative disorders associated with the immunocompromised state are related to EBV infection. The incidences of these disorders have been increasing along with generalization of organ transplantations and use of immunosuppressive treatments...
May 11, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28497350/synovial-cellular-and-molecular-markers-in-rheumatoid-arthritis
#6
REVIEW
M Asif Amin, David A Fox, Jeffrey H Ruth
The profound alterations in the structure, cellular composition, and function of synovial tissue in rheumatoid arthritis (RA) are the basis for the persistent inflammation and cumulative joint destruction that are hallmarks of this disease. In RA, the synovium develops characteristics of a tertiary lymphoid organ, with extensive infiltration of lymphocytes and myeloid cells. Concurrently, the fibroblast-like synoviocytes undergo massive hyperplasia and acquire a tissue-invasive phenotype. In this review, we summarize key components of these processes, focusing on recently-described roles of selected molecular markers of these cellular components of RA synovitis...
May 11, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/28489883/bmp-7-induces-apoptosis-in-human-germinal-center-b-cells-and-is-influenced-by-tgf-%C3%AE-receptor-type-i-alk5
#7
Lise K Bollum, Kanutte Huse, Morten P Oksvold, Baoyan Bai, Vera I Hilden, Lise Forfang, Sun Ok Yoon, Sébastien Wälchli, Erlend B Smeland, June H Myklebust
Selection and maturation of B cells into plasma cells producing high-affinity antibodies occur in germinal centers (GC). GCs form transiently in secondary lymphoid organs upon antigen challenge, and the GC reaction is a highly regulated process. TGF-β is a potent negative regulator, but the influence of other family members including bone morphogenetic proteins (BMPs) is less known. Studies of human peripheral blood B lymphocytes showed that BMP-6 suppressed plasmablast differentiation, whereas BMP-7 induced apoptosis...
2017: PloS One
https://www.readbyqxmd.com/read/28486951/cd30-expression-in-extranodal-natural-killer-t-cell-lymphoma-nasal-type-among-622-cases-of-mature-t-cell-and-natural-killer-cell-lymphoma-at-a-single-institution-in-south-china
#8
Yanfen Feng, Huilan Rao, Yiyan Lei, Yuhua Huang, Fang Wang, Yu Zhang, Shaoyan Xi, Qiuliang Wu, Jianyong Shao
BACKGROUND: Mature T-cell and natural killer (NK)-cell lymphomas compose a heterogeneous group of non-Hodgkin lymphomas, and extranodal NK/T-cell lymphoma, nasal type (ENKTL) is an aggressive subtype with sporadic CD30 expression. However, the significance of CD30 expression in ENKTL is controversial. We aimed to classify a large cohort of patients with mature T-cell and NK-cell lymphomas according to the 2016 World Health Organization (WHO) classification guidelines and to study the association between CD30 expression and prognosis of patients with ENKTL...
May 10, 2017: Chinese Journal of Cancer
https://www.readbyqxmd.com/read/28484459/human-cytomegalovirus-induced-degradation-of-cytip-modulates-dendritic-cell-adhesion-and-migration
#9
Linda Grosche, Christina Draßner, Petra Mühl-Zürbes, Lisa Kamm, Vu Thuy Khanh Le-Trilling, Mirko Trilling, Alexander Steinkasserer, Christiane S Heilingloh
As potent antigen-presenting cells, dendritic cells (DCs) are essential for the initiation of effective antiviral immune responses. Viruses and especially herpesviruses, which are able to establish lifelong persistence, exploit several immune evasion mechanisms targeting DC biology. Our group has previously shown that the α-herpesvirus herpes simplex virus type 1 inhibits mature DC (mDC) migration by inducing adhesion via degrading the cellular protein CYTIP (cytohesin-1 interacting protein), an important negative regulator of β2-integrin activity...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28479485/new-insights-into-the-pathogenesis-of-giant-cell-arteritis
#10
REVIEW
Francesco Ciccia, Aroldo Rizzo, Angelo Ferrante, Giuliana Guggino, Stefania Croci, Alberto Cavazza, Carlo Salvarani, Giovanni Triolo
Giant cell arteritis (GCA) is an inflammatory chronic disease occurring exclusively in elderly individuals. Until recently, the disease has been considered a unique disease resulting from the interaction in the walls of susceptible arteries, between an unknown infectious agents with local dendritic cells (DCs), activated CD4 T cells and effector macrophages. Recent evidence has shown that this view was too simplistic and has clarified many of the pathogenetic aspects of the disease. Many genetic studies recently published have identified different new genes, including cytokines, adhesion molecules and regulators of innate immunity, as crucial players in the development and progression of GCA...
May 4, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/28477107/assaying-radiosensitivity-of-ataxia-telangiectasia
#11
Hailiang Hu, Shareef Nahas, Richard A Gatti
Ataxia-Telangiectasia (A-T) is a prototypical genomic instability disorder with multi-organ deficiency and it is caused by the defective function of a single gene, ATM (Ataxia-Telangiectasia Mutated). Radiosensitivity, among the pleiotropic symptoms of A-T, reflects the basic physiological functions of ATM protein in the double strand break (DSB)-induced DNA damage response (DDR) and also restrains A-T patients from the conventional radiation therapy for their lymphoid malignancy. In this chapter, we describe two methods that have been developed in our lab to assess the radiosensitivity of A-T patients: (1) Colony Survival Assay (CSA) and (2) Flow Cytometry of phospho-SMC1 (FC-pSMC1)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28475283/cd69-from-activation-marker-to-metabolic-gatekeeper
#12
REVIEW
Danay Cibrián, Francisco Sánchez-Madrid
CD69 is a membrane-bound, type II C-lectin receptor. It is a classical early marker of lymphocyte activation due to its rapid appearance on the surface of the plasma membrane after stimulation. CD69 is expressed by several subsets of tissue resident immune cells, including resident memory T (TRM) cells and gamma delta (γδ) T cells, and is therefore considered a marker of tissue retention. Recent evidence has revealed that CD69 regulates some specific functions of selected T-cell subsets, determining the migration-retention ratio as well as the acquisition of effector or regulatory phenotypes...
May 5, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28466063/immunomodulatory-and-prophylactic-efficacy-of-herbal-extracts-against-experimentally-induced-chicken-infectious-anaemia-in-chicks-assessing-the-viral-load-and-cell-mediated-immunity
#13
Shyma K Latheef, K Dhama, Hari Abdul Samad, Mohd Yaqoob Wani, M Asok Kumar, M Palanivelu, Yashpal Singh Malik, S D Singh, Rajendra Singh
Chicken infectious anaemia virus (CIAV) is an economically important and a highly immunosuppressive virus affecting poultry industry worldwide. In this study we assessed the immunomodulatory effects of four herbal preparations namely Withania somnifera, Tinospora cordifolia, Azadirachta indica and E Care Se Herbal in resisting the viral multiplication and immunosuppression inflicted by CIAV in chicks. Day-old chicks (n = 90) were randomly and equally divided into six groups (Groups A-F). Groups A-D were administered with purified extracts of W...
March 2017: Virusdisease
https://www.readbyqxmd.com/read/28465341/invariant-nkt-cells-contribute-to-chronic-lymphocytic-leukemia-surveillance-and-prognosis
#14
Francesca Gorini, Laura Azzimonti, Gloria Delfanti, Lydia Scarfò, Cristina Scielzo, Maria Teresa Bertilaccio, Pamela Ranghetti, Alessandro Gulino, Claudio Doglioni, Arianna Di Napoli, Miriam Capri, Claudio Franceschi, Federico Caligaris-Cappio, Paolo Ghia, Matteo Bellone, Paolo Dellabona, Giulia Casorati, Claudia de Lalla
Chronic lymphocytic leukemia (CLL) is characterized by the expansion of malignant CD5(+) B lymphocytes in blood, bone marrow and lymphoid organs. CD1d-restricted invariant Natural Killer T (iNKT) cells are innate-like T lymphocytes strongly implicated in tumor surveillance. We investigated the impact of iNKT cells in the natural history of the disease both in Eμ;-Tcl1 (Tcl1) CLL mouse model and 68 CLL patients. We found that Tcl1-CLL cells express CD1d and iNKT cells critically delay the disease onset, but become functionally impaired upon disease progression...
May 2, 2017: Blood
https://www.readbyqxmd.com/read/28464174/inverse-correlation-of-lymphoid-leukemia-incidence-and-anemia-prevalence-among-preschool-children
#15
Frank D Groves
OBJECTIVE: The relation between the prevalence of anemia and incidence of childhood acute lymphoblastic leukemia was explored using international cross-sectional data as well as US time-series data. METHODS: Lymphoid leukemia incidence rates for various countries from the International Agency for Research on Cancer were regressed on anemia prevalence rates from the World Health Organization in a cross-sectional analysis. Four decades of acute lymphoblastic leukemia incidence (from the Surveillance, Epidemiology, and End Results Program cancer registries) and anemia prevalence (from the National Health and Nutrition Examination Survey) also were examined in a time-series analysis...
May 2017: Southern Medical Journal
https://www.readbyqxmd.com/read/28461487/nasal-associated-lymphoid-tissues-nalts-support-the-recall-but-not-priming-of-influenza-virus-specific-cytotoxic-t-cells
#16
Angela Pizzolla, Zhongfang Wang, Joanna R Groom, Katherine Kedzierska, Andrew G Brooks, Patrick C Reading, Linda M Wakim
The lymphoid tissue that drains the upper respiratory tract represents an important induction site for cytotoxic T lymphocyte (CTL) immunity to airborne pathogens and intranasal vaccines. Here, we investigated the role of the nasal-associated lymphoid tissues (NALTs), which are mucosal-associated lymphoid organs embedded in the submucosa of the nasal passage, in the initial priming and recall expansion of CD8(+) T cells following an upper respiratory tract infection with a pathogenic influenza virus and immunization with a live attenuated influenza virus vaccine...
May 1, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28457909/critical-role-for-skin-derived-migratory-dcs-and-langerhans-cells-in-tfh-and-gc-responses-after-intradermal-immunization
#17
Clément Levin, Olivia Bonduelle, Charles Nuttens, Charlotte Primard, Bernard Verrier, Alexandre Boissonnas, Béhazine Combadière
Intradermal (ID) delivery of antigen represents a potent route of immunization that involves multiple blood- and skin-derived dendritic cell (DC) sub-populations endowed with specialized functions and dynamics in their ability to prime naïve CD4+ T cells in the draining lymph node (DLN). Yet, their individual contributions to the generation of CD4+ T follicular helper (TFH) cells and germinal centers (GCs) remain to be understood. We found that ID immunization of mice with a particle-based vaccine induced robust TFH and GC B cell responses in skin DLNs, which were completely abrogated when skin cell emigration was prevented...
April 27, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28456950/a-rapid-fluorescence-assay-for-measuring-sphingosine-1-phosphate-transporter-activity-in-erythrocytes
#18
Naoki Kobayashi, Tsuyoshi Nishi
Sphingosine-1-phosphate (S1P) is an intercellular signaling molecule that is present in the plasma and plays an important role in recruiting lymphocytes from the thymus and secondary lymphoid organs. Erythrocytes are the most abundant cells in the blood and substantially contribute to the S1P supply in the plasma by releasing intracellularly synthesized S1P via an S1P transporter. Thus, the S1P transporter in erythrocytes is a potential target for immuno-suppressing drugs.In this chapter, we describe a rapid method for measuring the activity of the erythrocyte S1P transporter by using the fluorescent S1P analog, 7-nitro-2-1,3-benzoxadiazol-4-yl (NBD)-labeled S1P...
April 30, 2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28453771/interplay-between-ifn-%C3%AE-and-il-6-impacts-the-inflammatory-response-and-expression-of-interferon-regulated-genes-in-environmental-induced-autoimmunity
#19
David M Cauvi, Gabrielle Cauvi, Christopher B Toomey, Eric Jacquinet, K Michael Pollard
IFN-γ has been found to be robustly important to disease pathogenesis in both idiopathic and induced models of murine lupus. In transgenic mice, over production of IFN-γ in the skin results in an inflammatory response and autoimmunity. This suggests that localized exposure to environmental factors that induce autoimmunity may be associated with expression of an IFN-γ dependent inflammatory response. Using murine mercury-induced autoimmunity (mHgIA), the severity of inflammation and proinflammatory cytokine expression, including the cellular source of IFN-γ, were assessed at the site of subcutaneous exposure and in secondary lymphoid organs...
April 26, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28452930/interplay-between-the-hepatitis-b-virus-and-innate-immunity-from-an-understanding-to-the-development-of-therapeutic-concepts
#20
REVIEW
Suzanne Faure-Dupuy, Julie Lucifora, David Durantel
The hepatitis B virus (HBV) infects hepatocytes, which are the main cell type composing a human liver. However, the liver is enriched with immune cells, particularly innate cells (e.g., myeloid cells, natural killer and natural killer T-cells (NK/NKT), dendritic cells (DCs)), in resting condition. Hence, the study of the interaction between HBV and innate immune cells is instrumental to: (1) better understand the conditions of establishment and maintenance of HBV infections in this secondary lymphoid organ; (2) define the role of these innate immune cells in treatment failure and pathogenesis; and (3) design novel immune-therapeutic concepts based on the activation/restoration of innate cell functions and/or innate effectors...
April 28, 2017: Viruses
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