Role Of Cd2 And Its Ligands In T Cell Activation
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Role Of Cd2 And Its Ligands In T Cell Activation
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Author : Bin Li
language : en
Publisher:
Release Date : 2022
Role Of Cd2 And Its Ligands In T Cell Activation written by Bin Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
CD2 is a transmembrane molecule and a "non-canonical" member of the signaling lymphocyte activation molecule (SLAM) family of receptors that is expressed on T cells and NK cells. Its ligands, mouse CD48 and human CD58, are widely expressed on hematopoietic cells including antigen-presenting cells (APCs) and T cells. Previous studies indicated that CD2 promotes T-cell receptor (TCR) signaling when it is engaged by its ligands displayed on APCs. However, the supporting experimental data were rather controversial, and there is no general agreement about the role of CD2 in T cell activation. To study the function of CD2 and its ligands in T cells, we examined T cell functions in newly generated mouse strains lacking CD2 or CD48 in the C57BL/6 background. Compared to wild-type (WT) mice, T cells from CD2-deficient ("knock-out"; KO) mice had severe activation defects. Surprisingly, expression of CD48 on T cells, not on APCs, was also necessary for optimal T cell responses. We found evidence of CD2 interacted with CD48 in cis on T cells and observed their co-localization by confocal microscopy and fluorescence resonance energy transfer (FRET). The only exception was CD2-dependent cytotoxicity, which required CD48 both on T cells and on APCs. Mechanistic studies using mass spectrometry and structure-function analyses revealed that the cis interactions between CD2 and CD48 on T cells boosted TCR signaling, an effect that correlated with the capacity of CD2 to recruit the kinase Lck. Similarly, our further study revealed that the cis interactions between CD2 and CD58 on human T cells were also necessary for maximal TCR signaling and T cell activation. Taken together, our studies provide clear evidence that cis interactions between CD2 and its ligands on T cells are important in TCR signaling and T cell activation. Modulation of these cis interactions can be a promising approach to suppress or enhance T cell activation in a therapeutic setting.
The Leucocyte Antigen Factsbook
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Author : A. Neil Barclay
language : en
Publisher: Elsevier
Release Date : 1997-06-22
The Leucocyte Antigen Factsbook written by A. Neil Barclay and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-06-22 with Medical categories.
A volume in the popular FactsBook Series, the First Edition of The Leucocyte Antigen FactsBook was hugely successful. The new Second Edition has been completely revised, updated, and expanded by 65% to include new findings and up-to-date key references. The introductory chapters have also been updated, especially in terms of nomenclature, the role of the World Wide Web, and new structural data. The Leucocyte Antigen FactsBook, Second Edition contains more than 200 entries, with approximately 70 new entries, on all the molecules specifically expressed in the surface of cells of the haematopoietic system, including all characterized CD antigens, antigen receptors, MHC antigens, adhesion molecules, and cytokine receptors. This FactsBook will be of enormous value to immunologists, cell biologists, biochemists, and endocrinologists. Key Features* Completely up-to-date* Revised and expanded to include over 70 new entries* More than 200 entries in total, plus additional introductory material* New structural data* New nomenclature for CD and related molecules covered
The Role Of The Cd2 Glycoprotein In T Cell Activation And Adhesion
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Author : William Chun Hahn
language : en
Publisher:
Release Date : 1992
The Role Of The Cd2 Glycoprotein In T Cell Activation And Adhesion written by William Chun Hahn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with CD antigens categories.
Immunological Synapse
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Author : Takashi Saito
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-12-03
Immunological Synapse written by Takashi Saito and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-12-03 with Medical categories.
The proper physiological functioning of most eukaryotic cells requires their assembly into multi-cellular tissues that form organized organ systems. Cells of the immune system develop in bone marrow and lymphoid organs, but as the cells mature they leave these organs and circulate as single cells. Antigen receptors (TCRs) of T cells search for membrane MHC proteins that are bound to peptides derived from infectious pathogens or cellular transformations. The detection of such speci?c peptide–MHC antigens initiates T cell activation, adhesion, and immune-effectors functions. Studies of normal and transformed T cell lines and of T cells from transgenic mice led to comprehensive understanding of the mole- lar basis of antigen-receptor recognition and signaling. In spite of these remarkable genetic and biochemical advances, other key physiological mechanisms that par- cipate in sensing and decoding the immune context to induce the appropriate cellular immune responses remain unresolved. TCR recognition is tightly regulated to trigger sensitive but balanced T cell responses that result in the effective elimination of the pathogens while minimizing collateral damage to the host. The sensitivity of TCR recognition has to be properly tempered to prevent unintended activation by self-peptide–MHC complexes that cause autoimmune diseases. It is likely that once the TCR is engaged by a peptide– MHC and TCR signaling begins, additional regulatory mechanisms, involving other receptors, would increase the ?delity of the response.
The Immune Synapse
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Author : Cosima T. Baldari
language : en
Publisher: Springer Nature
Release Date : 2023-04-27
The Immune Synapse written by Cosima T. Baldari and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-04-27 with Science categories.
This new collection features the most up-to-date essential protocols that are currently being used to study the immune synapse. Beginning with methods for making biophysical measurements, the volume continues by covering the cell biology of synapses, methods for advanced substrate engineering, mechanobiology topics, new technologies to describe and manipulate synaptic components, as well as methods related to sites of action and immunotherapy. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step and readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and fully updated, The Immune Synapse: Methods and Protocols, Second Edition serves as an ideal practical guide for researchers working in this dynamic field. Chapters 5, 11, 18, 27, 30, and 32 are available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.
Structural Biology In Immunology
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Author : Chaim Putterman
language : en
Publisher: Academic Press
Release Date : 2018-05-14
Structural Biology In Immunology written by Chaim Putterman and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-14 with Medical categories.
Structural Biology in Immunology, Structure/Function of Novel Molecules of Immunologic Importance delivers important information on the structure and functional relationships in novel molecules of immunologic interest. Due to an increasingly sophisticated understanding of the immune system, the approach to the treatment of many immune-mediated diseases, including multiple sclerosis, systemic lupus erythematosus, rheumatoid arthritis, and inflammatory bowel disease has been dramatically altered. Furthermore, there is an increasing awareness of the critical role of the immune system in cancer biology. The improved central structure function relationships presented in this book will further enhance our ability to understand what defects in normal individuals can lead to disease. Describes novel/recently discovered immunomodulatory proteins, including antibodies and co-stimulatory or co-inhibitory molecules Emphasizes new biologic and small molecule drug design through the exploration of structure-function relationship Features a collaborative editorial effort, involving clinical immunologists and structural biologists Provides useful and practical insights on developing the necessary links between basic science and clinical therapy in immunology Gives interested parties a bridge to learn about computer modeling and structure based design principles
Molecular Biology Of The Cell
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Author : Bruce Alberts
language : en
Publisher:
Release Date : 2002
Molecular Biology Of The Cell written by Bruce Alberts and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Cytology categories.
Developing Costimulatory Molecules For Immunotherapy Of Diseases
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Author : Manzoor Ahmad Mir
language : en
Publisher: Academic Press
Release Date : 2015-05-25
Developing Costimulatory Molecules For Immunotherapy Of Diseases written by Manzoor Ahmad Mir and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-05-25 with Medical categories.
Developing Costimulatory Molecules for Immunotherapy of Diseases highlights the novel concept of reverse costimulation and how it can be effectively exploited to develop immunotherapy using either humanized antibodies against CD80, CD86, and other costimulatory molecules or CD28 fusinogenic proteins in the treatment of diseases, including allergies, asthma, rheumatoid arthritis, multiple sclerosis, lupus nephritis, severe psoriasis, vulgaris tuberculosis, thopoid, transplantation therapeutic, cancer, and inflammation. The text aims to provide the latest information on the complex roles and interactions within the CD28 and B7 costimulatory families, with the hope that targeting these families will yield new therapies for the treatment of inflammation, autoimmunity, transplantation, cancer, and other infectious diseases. Highlights the novel concept of reverse costimulation and how it can be effectively exploited to develop immunotherapy Provides the latest information on the complex roles and interactions within the CD28 and B7 costimulatory families Targets new therapies for the treatment of inflammation, autoimmunity, transplantation, cancer, and other infectious diseases
Lymphocyte Activation
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Author : L.E. Samelson
language : en
Publisher:
Release Date : 1994
Lymphocyte Activation written by L.E. Samelson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Medical categories.
Indoor Allergens
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1993-02-01
Indoor Allergens written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-02-01 with Science categories.
More than 50 million Americans, one out of five, suffer from hay fever, asthma, and other allergic diseases. Many of these conditions are caused by exposure to allergens in indoor environments such as the house, work, and schoolâ€"where we spend as much as 98 percent of our time. Developed by medical, public health, and engineering professionals working together, this unique volume summarizes what is known about indoor allergens, how they affect human health, the magnitude of their effect on various populations, and how they can be controlled. The book addresses controversies, recommends research directions, and suggests how to assist and educate allergy patients, as well as professionals. Indoor Allergens presents a wealth of information about common indoor allergens and their varying effects, from significant hay fever to life-threatening asthma. The volume discusses sources of allergens, from fungi and dust mites to allergenic chemicals, plants, and animals, and examines practical measures for their control. Indoor Allergens discusses how the human airway and immune system respond to inhaled allergens and assesses patient testing methods, covering the importance of the patient's medical history and outlining procedures and approaches to interpretation for skin tests, in vitro diagnostic tests, and tests of patients' pulmonary function. This comprehensive and practical volume will be important to allergists and other health care providers; public health professionals; specialists in building design, construction, and maintenance; faculty and students in public health; and interested allergy patients.