Abstract：
:In the adult thymus the majority of thymocytes are at a non-proliferating end stage, during which 3% of all CD4+CD8+ cortical thymocytes are selected on the basis of appropriate T-cell antigen-receptor (TcR) specificity to become CD4-CD8+ or CD4+CD8- mature thymocytes. The selected mature cells gradually emigrate to the periphery. The 97% unselected, or positively rejected, CD4+CD8+ thymocytes die in the thymus. This 3-day end stage is, however, the product of around 2 weeks of proliferation by less mature thymocytes, which gives about a 10(5)-fold expansion from the hundred prothymocytes estimated to seed the thymus each day. Rearrangement and expression of TcR genes and a sequence of changes in surface antigens occurs during this prolonged period. Two sequential waves of expansion and differentiation appear to be involved. The first, about 1 week long, involves the less than 0.1% of thymocytes which still resemble the prothymocyte; this leads via a non-dividing interval to the second 1-week stage involving the 3% of CD4-CD8- thymocytes and then the CD4+CD8+ blasts.
journal_name
Semin Immunoljournal_title
Seminars in immunologyauthors
Shortman K,Egerton M,Spangrude GJ,Scollay Rsubject
Has Abstractpub_date
1990-01-01 00:00:00pages
3-12issue
1eissn
1044-5323issn
1096-3618journal_volume
2pub_type
杂志文章,评审abstract：:Protein tyrosine phosphatases (PTPs) are a family of enzymes that modulate the cellular level of tyrosine phosphorylation. Based on cellular location, they are classified as receptor like or intracellular PTPs. Structure and function studies have led to the understanding of the enzymatic mechanism of this class of enz...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1006/smim.2000.0209
更新日期：2000-02-01 00:00:00
abstract：:Helper T cell activation leads to transient expression of a ligand for the B cell surface protein, CD40. CD40 ligand can deliver helper T cell-derived contact signals to B lymphocytes that drive B cell activation and proliferation. Regulation of expression of CD40 ligand is analogous to that of other helper T cell-der...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1006/smim.1994.1037
更新日期：1994-10-01 00:00:00
abstract：:Advancing age is accompanied by profound changes in immune function; some are induced by the loss of critical niches that support development of naïve cells (e.g. thymic involution), others by the intrinsic physiology of long-lived cells attempting to maintain homeostasis, still others by extrinsic effects such as oxi...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2012.04.007
更新日期：2012-10-01 00:00:00
abstract：:Senescent cells (SCs) arise from normal cells in multiple organs due to inflammatory, metabolic, DNA damage, or tissue damage signals. SCs are non-proliferating but metabolically active cells that can secrete a range of pro-inflammatory and proteolytic factors as part of the senescence-associated secretory phenotype (...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2019.04.003
更新日期：2018-12-01 00:00:00
abstract：:Decades of basic research has established the importance of Ca2+ to various T cell functions, such as cytotoxicity, proliferation, differentiation and cytokine secretion. We now have a good understanding of how proximal TCR signaling initiates Ca2+ influx and how this influx subsequently changes transcriptional activi...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2020.101434
更新日期：2020-06-01 00:00:00
abstract：:The germinal center is a critical locus in the production of protective immunity, but its function is poorly understood. Studies of mutant forms of CD19 revealed differences in signaling in different compartments inside the germinal center, and structural findings indicate a selective role in the interaction with foll...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2007.12.007
更新日期：2008-02-01 00:00:00
abstract：:The mucosal surfaces of the lungs are a major portal of entry for virus infections and there are urgent needs for new vaccines that promote effective pulmonary immunity. However, we have only a rudimentary understanding of the requirements for effective cellular immunity in the respiratory tract. Recent studies have r...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2004.02.003
更新日期：2004-06-01 00:00:00
abstract：:Initially discovered as an initiator protease in apoptosis mediated by death receptors, caspase-8 is now known to have an apparently confounding opposing effect in securing cell survival. It is required to allow mouse embryo survival, and the survival of hematopoietic cells during their development and activation. Cla...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2014.03.005
更新日期：2014-06-01 00:00:00
abstract：:Follicular dendritic cells (FDCs) have important functions in the selection of memory B lymphocytes during germinal center reactions (GCR). They present native antigens to potential memory cells, of which only B cells with high affinity B cell receptors (BCR) can bind. These B lymphocytes survive, whereas nonbinding B...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/s1044-5323(02)00057-x
更新日期：2002-08-01 00:00:00
abstract：:Despite the overwhelming success of immunization in reducing, and even eliminating, the global threats posed by a wide spectrum of infectious diseases, attempts to do the same for tuberculosis (TB) have failed to date. While most effective vaccines act by eliciting neutralizing antibodies, T cells are the primary medi...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2014.10.003
更新日期：2014-12-01 00:00:00
abstract：:A humoral immune response in the form of autoantibodies to tumor antigens occurs early during tumor development. Identification of antigens that induce an autoantibody response restricted to a cancer type has the potential to yield markers useful for early detection. A multitude of strategies are currently available f...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2020.101388
更新日期：2020-02-01 00:00:00
abstract：:After decades of slow progress, the last years have seen a rapid acceleration of the development of adjuvanted vaccines which have lately been approved for human use. These adjuvants consist of different components, e.g. aluminium salts, emulsions such as MF59 and AS03, Toll-like receptor (TLR) agonists (CpG ormonopho...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2018.05.001
更新日期：2018-10-01 00:00:00
abstract：:Celiac disease (CD) is an increasingly common disease of the small intestine that occurs in genetically susceptible subjects by ingestion of cereal gluten proteins. Gluten is highly abundant in the modern diet and well tolerated by most individuals. In CD, however, an erroneous but highly specific, adaptive immune res...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2015.11.001
更新日期：2015-09-01 00:00:00
abstract：:Since its first description by Wells and Osbourne in 1911, oral tolerance has intrigued researchers due to its potential for therapeutic applications. Oral tolerance can be defined as an inhibition of specific immune responsiveness to subsequent parenteral injections of proteins to which an individual or animal has be...
journal_title：Seminars in immunology
pub_type： 历史文章,杂志文章,评审
doi：10.1016/j.smim.2017.07.004
更新日期：2017-04-01 00:00:00
abstract：:From the earliest days in the field of tumor immunology three questions have been asked: do cancer cells express tumor-specific antigens, does the immune system recognize these antigens and if so, what is their biochemical nature? We now know that truly tumor-specific antigens exist, that they are caused by somatic mu...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2008.07.001
更新日期：2008-10-01 00:00:00
abstract：:Dysbiosis of gut microbiota occurs in many human chronic immune-mediated diseases, such as inflammatory bowel disease (IBD) and colitis-associated colorectal cancer (CAC). Reciprocally, uncontrolled immune responses, that may or may not be induced by dysbiosis, are central to the development of IBD and CAC. There has ...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2017.04.003
更新日期：2017-08-01 00:00:00
abstract：:The pursuit of clinical transplant tolerance has led to enhanced understanding of mechanisms underlying immune regulation, including the characterization of immune regulatory cells, in particular antigen-presenting cells (APC) and regulatory T cells (Treg), that may play key roles in promoting operational tolerance. D...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2011.06.007
更新日期：2011-08-01 00:00:00
abstract：:T helper (TH) cells can assume different phenotypes characterized by the secretion of distinct effector molecules. Interferon-gamma producing TH1 and IL-4 producing TH2 cells have long been recognized as important mediators of host defense, whereas regulatory T cells are known to suppress T cell responses. Recently, T...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2007.10.016
更新日期：2007-12-01 00:00:00
abstract：:Plasmacytoid dendritic cells (pDCs) are specialized sensors of viral nucleic acids that initiate protective immunity through the production of type I interferons (IFNs). Normally, pDCs fail to sense host-derived self-nucleic acids but do so when self-nucleic acids form complexes with endogenous antimicrobial peptides ...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2009.01.004
更新日期：2009-06-01 00:00:00
abstract：:The complement system covalently attaches C3d to microbial antigens which binds to CR2 on B lymphocytes, leading to a markedly enhanced adaptive immune response to that antigen. The enhancement is mediated by the cross-linking of the CR2-CD19 complex to mIg which augments the activation of several intracellular signal...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1006/smim.1998.0137
更新日期：1998-10-01 00:00:00
abstract：:In humans, blood is commonly monitored to provide surrogates of disease progression and assess immune status. However, the varied, rapid and atypical alterations in lymphocyte subsets which may occur in blood in response to pathogens, are not predictive of changes in the bulk of the immune system. A hallmark of human ...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1006/smim.1999.0169
更新日期：1999-04-01 00:00:00
abstract：:Secondary, so-called costimulatory, signals are critically required for the process of T cell activation. Since landmark studies defined that T cells receiving a T cell receptor signal without a costimulatory signal, are tolerized in vitro, the investigation of T cell costimulation has attracted intense interest. Earl...
journal_title：Seminars in immunology
pub_type： 杂志文章
doi：10.1016/j.smim.2011.04.002
更新日期：2011-08-01 00:00:00
abstract：:The tyrosine activating motif (TAM) is a conserved signaling motif present in many hematopoietic receptors. Although the exact definition and the function of these motifs is not known, it is likely that these motifs bind and activate protein tyrosine kinases. Here we summarize the data regarding tyrosine kinase intera...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/1044-5323(95)90003-9
更新日期：1995-02-01 00:00:00
abstract：:In a panel of wild mice trapped in different geographical regions, the concomitant expression of V beta 17 T cell receptors and I-E histocompatibility molecules is frequent. By Southern blot analysis, eight forms of V beta 17 genes have been distinguished that encode five kinds of V beta 17 domains. Populations of Asi...
journal_title：Seminars in immunology
pub_type： 杂志文章
doi：
更新日期：1992-10-01 00:00:00
abstract：:B cells require signals from multiple sources for their development from precursor cells, and differentiation into effector cells. BAFF has been identified as a critical regulator of B cell development and differentiation. Defects in the production of BAFF and/or expression of its receptors have been associated with a...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2006.04.004
更新日期：2006-10-01 00:00:00
abstract：:Multiple monoclonal and polyclonal antibody preparations have been shown to neutralize HIV-1 infection in vitro. Upon direct testing in humans, however, many of these have failed to demonstrate clinical efficacy. Hu-PBL-SCID mice offer a model system in which to test the pre-clinical efficacy of antibody preparations....
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1006/smim.1996.0033
更新日期：1996-08-01 00:00:00
abstract：:Interferon epsilon (IFNε) is a type I IFN with unusual patterns of expression and therefore, function. It is constitutively expressed by reproductive tract epithelium and regulated by hormones during estrus cycle, reproduction, and menopause and by exogenous hormones. The IFNe protein is encoded by a gene in the type ...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2019.101328
更新日期：2019-06-01 00:00:00
abstract：:Cellular activation is mainly defined as the response of a cell to exogenous signals eventually leading to changes in protein expression and cellular function. Originally, macrophage activation was mainly associated with phagocytic function. Later other effector functions such as cytokine secretion, upregulation of ce...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2016.03.009
更新日期：2015-12-01 00:00:00
abstract：:The ability of the immune system to discriminate between healthy-self, abnormal-self, and non-self has been attributed mainly to alarmins signaling as "danger signals". It is now evident, however, that alarmins are much more complex and can perform specialized functions that can regulate a wide spectrum of processes r...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2018.08.004
更新日期：2018-08-01 00:00:00
abstract：:Antibody production is crucial for a successful vaccine response. Beyond the ability of vitamin A (VA) and its active metabolite, all-trans-retinoic acid (RA) to restore growth in VA-deficient animals, supplementation with VA and/or treatment with RA can augment antibody responses in both VA-deficient and VA-adequate ...
journal_title：Seminars in immunology
pub_type： 杂志文章,评审
doi：10.1016/j.smim.2008.08.004
更新日期：2009-02-01 00:00:00
