Dissection of SAP-dependent and SAP-independent SLAM family signaling in NKT cell development and humoral immunity. 2017

Shasha Chen, and Chenxu Cai, and Zehua Li, and Guangao Liu, and Yuande Wang, and Marzenna Blonska, and Dan Li, and Juan Du, and Xin Lin, and Meixiang Yang, and Zhongjun Dong
Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100086, China.

Signaling lymphocytic activation molecule (SLAM)-associated protein (SAP) mutations in X-linked lymphoproliferative disease (XLP) lead to defective NKT cell development and impaired humoral immunity. Because of the redundancy of SLAM family receptors (SFRs) and the complexity of SAP actions, how SFRs and SAP mediate these processes remains elusive. Here, we examined NKT cell development and humoral immunity in mice completely deficient in SFR. We found that SFR deficiency severely impaired NKT cell development. In contrast to SAP deficiency, SFR deficiency caused no apparent defect in follicular helper T (TFH) cell differentiation. Intriguingly, the deletion of SFRs completely rescued the severe defect in TFH cell generation caused by SAP deficiency, whereas SFR deletion had a minimal effect on the defective NKT cell development in SAP-deficient mice. These findings suggest that SAP-dependent activating SFR signaling is essential for NKT cell selection; however, SFR signaling is inhibitory in SAP-deficient TFH cells. Thus, our current study revises our understanding of the mechanisms underlying T cell defects in patients with XLP.

UI MeSH Term Description Entries
D008232 Lymphoproliferative Disorders Disorders characterized by proliferation of lymphoid tissue, general or unspecified. Duncan's Syndrome,X-Linked Lymphoproliferative Syndrome,Duncan Disease,Epstein-Barr Virus Infection, Familial Fatal,Epstein-Barr Virus-Induced Lymphoproliferative Disease In Males,Familial Fatal Epstein-Barr Infection,Immunodeficiency 5,Immunodeficiency, X-Linked Progressive Combined Variable,Lymphoproliferative Disease, X-Linked,Lymphoproliferative Syndrome, X-Linked, 1,Purtilo Syndrome,X-Linked Lymphoproliferative Disease,X-Linked Lymphoproliferative Disorder,Disease, Duncan,Disease, X-Linked Lymphoproliferative,Diseases, X-Linked Lymphoproliferative,Disorder, Lymphoproliferative,Disorder, X-Linked Lymphoproliferative,Disorders, Lymphoproliferative,Disorders, X-Linked Lymphoproliferative,Epstein Barr Virus Induced Lymphoproliferative Disease In Males,Epstein Barr Virus Infection, Familial Fatal,Familial Fatal Epstein Barr Infection,Immunodeficiency 5s,Immunodeficiency, X Linked Progressive Combined Variable,Lymphoproliferative Disease, X Linked,Lymphoproliferative Diseases, X-Linked,Lymphoproliferative Disorder,Lymphoproliferative Disorder, X-Linked,Lymphoproliferative Disorders, X-Linked,Lymphoproliferative Syndrome, X-Linked,Lymphoproliferative Syndromes, X-Linked,Purtilo Syndromes,Syndrome, Purtilo,Syndrome, X-Linked Lymphoproliferative,Syndromes, Purtilo,Syndromes, X-Linked Lymphoproliferative,X Linked Lymphoproliferative Disease,X Linked Lymphoproliferative Disorder,X Linked Lymphoproliferative Syndrome,X-Linked Lymphoproliferative Diseases,X-Linked Lymphoproliferative Disorders,X-Linked Lymphoproliferative Syndromes
D000071176 Signaling Lymphocytic Activation Molecule Family Type-I membrane glycoproteins that are expressed primarily on the surface of CD4 or CD8-positive T-CELLS; NATURAL KILLER CELLS; and some populations of B CELLS. They are characterized by an N-terminal, extracellular IMMUNOGLOBULIN-LIKE DOMAIN and a membrane-proximal IMMUNOGLOBULIN C2-SET DOMAIN. SLAMF receptors typically signal through homophilic interactions and are important for mediating the immune response and immune cell differentiation. SLAM Family Receptors,SLAMF Receptors,Signaling Lymphocytic Activation Molecule Family Receptors,Signaling Lymphocytic Activation Molecule Receptors,Signaling Lymphocytic Activation Molecules
D000071177 Signaling Lymphocytic Activation Molecule Family Member 1 A 70-kDa SLAM family receptor that consists of an extracellular IMMUNOGLOBULIN-LIKE DOMAIN and an IMMUNOGLOBULIN C2-SET DOMAIN. It is expressed primarily by THYMOCYTES and activated T-LYMPHOCYTES, as well as by MACROPHAGES and DENDRITIC CELLS. It binds SLAMF1 receptors on other cells to mediate T-cell maturation and proliferation. It is also a receptor for the MEASLES VIRUS. CD150 Antigen,CDw150 Protein,SLAM Protein,SLAM Receptor,SLAMF1 Protein,SLAMF1 Receptor,Antigen, CD150
D000071179 Signaling Lymphocytic Activation Molecule Associated Protein A signal transducing adaptor protein that contains a single SH2 DOMAIN and is essential for the regulation of SLAM FAMILY RECEPTORS in the immune response. Mutations in the SLAM-associated protein gene have been identified in cases of X-LINKED LYMPHOPROLIFERATIVE DISEASE. SH2D1A Protein,SLAM-Associated Protein,SLAM Associated Protein
D000072183 Phosphatidylinositol-3,4,5-Trisphosphate 5-Phosphatases Phosphoinositide phosphatases that catalyze the dephosphorylation (hydrolysis) of phosphatidylinositol-3,4,5-trisphosphate (PtdIns(3,4,5)P(3)) to produce PtdIns(3,4)P(2), which negatively regulates the PI3K ( 3-PHOSPHOINOSITIDE-DEPENDENT PROTEIN KINASES) pathways. They contain an SH2 DOMAIN and STERILE ALPHA MOTIF and have important functions in regulating the immune response and other cellular processes in vertebrates. SHIP Phosphatases,Src Homology 2 Domain-Containing Inositol Phosphatases,Phosphatases, SHIP,Src Homology 2 Domain Containing Inositol Phosphatases
D000075722 Promyelocytic Leukemia Zinc Finger Protein A Kruppel-type transcription factor consisting of an N-terminal BTB DOMAIN and nine CYS2-HIS2 ZINC FINGERS. It localizes to the nucleus and regulates cell cycle progression and gene expression for tissue development and homeostasis; it may also function as an epigenetic regulator through its interactions with HISTONE DEACETYLASE. Genetic rearrangements involving the ZBTB16 gene are associated with ACUTE PROMYELOCYTIC LEUKEMIA. PLZF Protein,Promyelocytic Leukaemia Zinc Finger Protein,ZBTB16 Protein,Zinc Finger and BTB Domain Containing 16 Protein
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000950 Antigens, Ly A group of lymphocyte surface antigens located on mouse LYMPHOCYTES. Specific Ly antigens are useful markers for distinguishing subpopulations of lymphocytes. Ly Antigens
D015398 Signal Transduction The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway. Cell Signaling,Receptor-Mediated Signal Transduction,Signal Pathways,Receptor Mediated Signal Transduction,Signal Transduction Pathways,Signal Transduction Systems,Pathway, Signal,Pathway, Signal Transduction,Pathways, Signal,Pathways, Signal Transduction,Receptor-Mediated Signal Transductions,Signal Pathway,Signal Transduction Pathway,Signal Transduction System,Signal Transduction, Receptor-Mediated,Signal Transductions,Signal Transductions, Receptor-Mediated,System, Signal Transduction,Systems, Signal Transduction,Transduction, Signal,Transductions, Signal
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus

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