Abstract:
:We sought to model the mechanism by which leucocytes may be actively repulsed by a beta-chemokine signal. This model is used to interpret an apparent paradox in chemokine biology, whereby high levels of a T-cell chemoattractant, stromal cell derived factor-1 (SDF-1), are present in bone marrow and thymic tissues despite a paucity of mature T lymphocytes in these areas. We postulate the differential involvement in cell migration of the two binding sites on SDF-1 for its sole receptor, CXCR4, depending on whether high or low concentrations of SDF-1 are encountered by the cell. Site choice would be mediated by divergent affinities of the two binding interactions. We also propose differential signalling following SDF-1/CXCR4 interactions on the plasma membrane versus ligand/receptor complexes in endocytic vesicles. Preliminary data showing divergent susceptibility to kinase inhibitors depending on whether a cell is attracted to or repulsed by SDF-1, are consistent with this model. In terms of physical movement toward or away from a chemokine gradient, we compare the cycling of surface receptors during migration to the caterpillar drive of a tractor, which can change direction simply by altering the direction of rotation of its threads. Finally, the potential clinical implications of concentration-dependent, chemokine-based cell attraction and repulsion are discussed.
journal_name
Immunol Cell Bioljournal_title
Immunology and cell biologyauthors
Zlatopolskiy A,Laurence Jdoi
10.1046/j.1440-1711.2001.01015.xsubject
Has Abstractpub_date
2001-08-01 00:00:00pages
340-4issue
4eissn
0818-9641issn
1440-1711pii
icb1015journal_volume
79pub_type
杂志文章abstract::Neospora caninum is a coccidian parasite causative of clinical infections in a wide range of animal hosts. The maturation and activation of splenic conventional dendritic cells (cDCs) and plasmacytoid dendritic cells (pDCs) were studied here in BALB/c mice challenged intraperitoneal with N. caninum tachyzoites. The nu...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.2009.65
更新日期:2010-01-01 00:00:00
abstract::Follicular dendritic cells (FDC) play a crucial role in the regulation of humoral immunity. They are believed to be responsible for long-term persistence of antibody, due to their role in antibody response induction and their ability to retain antigen in immunogenic form for long periods. In this article, a regulatory...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.2017.55
更新日期:2017-10-01 00:00:00
abstract::Productive immune responses to T-cell-dependent antigens ultimately generate two long-lived compartments: memory B cells and bone marrow-resident plasma cells, which both arise from within germinal centres. The ability of a B-cell clone to populate these effector compartments requires its descendents to outcompete tho...
journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
doi:10.1038/sj.icb.7100148
更新日期:2008-02-01 00:00:00
abstract::Respiratory syncytial virus causes lower respiratory tract infections in infancy and old age, affecting also immunocompromised patients. The viral fusion protein is an important vaccine candidate eliciting antibody and cell-mediated immune responses. CD8(+) cytotoxic T lymphocytes (CTLs) are known to have a role in bo...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.2012.43
更新日期:2012-11-01 00:00:00
abstract::Natural suppressor (NS) cell line (Clone 59) was established from the bone marrow of adult C3H/Hej mice in the presence of WEHI-3 conditioned media. Clone 59 cells suppressed the generation of cytotoxic T lymphocytes from normal mouse spleen. This suppression was seen at a responder-to-suppressor cell ratio of 1000:1 ...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1995.51
更新日期:1995-08-01 00:00:00
abstract::γδ T cells producing interleukin-17A (γδT17) are thought to develop spontaneously in the thymus and to be maintained in the periphery. Previous studies suggested a role for T-helper 17 (Th17) cells in the maintenance of γδT17 via the expression of transforming growth factor-β1 (TGFβ1). However, we have previously foun...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.2016.94
更新日期:2017-03-01 00:00:00
abstract::Chronic HIV infection is associated with increased risk of cardiovascular disease (CVD), including in patients with virological suppression. Persistent innate immune activation may contribute to the development of CVD via activation of monocytes in these patients. We investigated whether changes in monocyte phenotype ...
journal_title:Immunology and cell biology
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1038/icb.2013.84
更新日期:2014-02-01 00:00:00
abstract::The glycoprotein processing inhibitor castanospermine (CS) and the monosaccharide mannose-6-phosphate (M6P), as well as some sulfated polysaccharides (SPS), have been shown to inhibit inflammation in rat models of experimental autoimmune encephalomyelitis and adjuvant-induced arthritis. Here, the anti-inflammatory eff...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1994.55
更新日期:1994-10-01 00:00:00
abstract::FOXP3+ regulatory T (Treg) cells are indispensable for immune homeostasis, but their study in humans is complicated by heterogeneity within Treg, the difficulty in purifying Tregs using surface marker expression (e.g. CD25) and the transient expression of FOXP3 by activated effector cells. Here, we report that express...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.2015.90
更新日期:2016-03-01 00:00:00
abstract::CD8 T cells exhibit dynamic alterations in proliferation and apoptosis during various phases of the CD8 T-cell response, but the mechanisms that regulate cellular proliferation from the standpoint of CD8 T-cell memory are not well defined. The cyclin-dependent kinase inhibitor p27(Kip1) functions as a negative regulat...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.2012.71
更新日期:2013-02-01 00:00:00
abstract::During the development of the nervous system neurons extend axons through a complex embryonic environment. To find a correct target, often located at a long distance, the neuronal growth cones travel along highly specific and stereotyped pathways. Proper neuronal pathfinding is thought to be accomplished by the specif...
journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
doi:10.1038/icb.1995.90
更新日期:1995-12-01 00:00:00
abstract::This paper reports the isolation and characterization of sheep umbilical vein endothelial cells (ShUVEC) and examines the kinetics of the expression of intercellular cell adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1). In culture, the cells demonstrate the classical endothelial cell phenot...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1997.4
更新日期:1997-02-01 00:00:00
abstract::The present report provides the first extensive characterization of the OT-I TCR transgenic line, which produces MHC class I-restricted, ovalbumin-specific, CD8+ T cells (OT-I cells). These cells are shown to be positively selected in vivo in H-2b C57BL/6 mice and in bm5 mice, which express the Kbm5 mutant molecule. I...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1046/j.1440-1711.2000.00889.x
更新日期:2000-04-01 00:00:00
abstract::Using 'knockin' mice to track and ablate dendritic cells (DCs) expressing notably the langerin (Cd207) gene, it has been possible to identify five DC subsets within the skin and to assess whether functional specialization exists among them. The present review summarizes recent information concerning the phenotype and ...
journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
doi:10.1038/icb.2010.34
更新日期:2010-05-01 00:00:00
abstract::Infections caused by group A streptococcus (GAS) represent a public health problem in both developing and developed countries. The current available methods of prevention are either inadequate or ineffective, which is highlighted by the resurgence in invasive GAS infections over the past two decades. The management of...
journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
doi:10.1038/icb.2009.29
更新日期:2009-07-01 00:00:00
abstract::Adoptive transfer of tumor-specific cytotoxic T cells is a promising advance in cancer therapy. Similarly, checkpoint inhibition has shown striking clinical results in some patients. Here we combine adoptive cell transfer with ablation of the checkpoint protein Src homology 2-domain-containing phosphatase 1 (SHP-1, Pt...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.2016.45
更新日期:2016-09-01 00:00:00
abstract::The gut mucosal system must fulfil conflicting roles in suppressing immune responses against orally fed antigens (tolerance) while still retaining the ability to respond to potential enteric pathogens. It must also, to a large degree, not mount an immune response against commensal enteric bacteria and the administrati...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1046/j.1440-1711.2000.00883.x
更新日期:2000-02-01 00:00:00
abstract::Tumour cell heterogeneity is probably a principal cause of treatment failure and represents a formidable barrier for effective antibody-targeted chemotherapy. Idarubicin (Ida), a more potent and less cardiotoxic analogue of daunomycin, has been demonstrated to specifically target and eradicate homogeneous, cloned, mur...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1993.19
更新日期:1993-06-01 00:00:00
abstract::During an allergic inflammatory response in the airway, if a failure of the epithelial cell barrier occurs before the systemic immune response is triggered by allergens, more allergens can invade. Using a rat model of asthma, we previously found that mucosal mast cells, which localise to the epithelial layer of the ai...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.2010.90
更新日期:2011-02-01 00:00:00
abstract::Lymphocytes exchanged rapidly and extensively between mutually tolerant, allogeneic rats following surgical parabiosis. Tolerated allogeneic cells persisted for an extended period in parabiotic partners after separation. A rapid exchange of cells was also observed between parabiosed syngeneic pairs of normal and allog...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1987.29
更新日期:1987-06-01 00:00:00
abstract::The discovery of functional long noncoding RNAs (lncRNAs) coupled with the ever-increasing accessibility of genomic and transcriptomic technology has led to an explosion of functional and mechanistic investigation and discovery into what was once dismissed as junk DNA. Over the past decade, a significant number of lnc...
journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
doi:10.1038/icb.2015.2
更新日期:2015-03-01 00:00:00
abstract::Several histone deacetylases (HDACs) are involved in the regulation of forkhead box protein P3 (FOXP3) expression and function by affecting features of FOXP3 protein stability. FOXP3, a forkhead family transcription factor specially expressed in regulatory T (Treg) cells, controls the expression of many key immune-reg...
journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
doi:10.1038/icb.2011.101
更新日期:2012-01-01 00:00:00
abstract::Early pregnancy factor (EPF), an extracellular chaperonin 10 homologue, has immunosuppressive and growth factor properties. In order to carry out more extensive studies on the in vivo characteristics of EPF, a recombinant form of the molecule has been prepared. Recombinant human EPF (rEPF) was expressed in Escherichia...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1046/j.1440-1711.2000.00951.x
更新日期:2000-12-01 00:00:00
abstract::CD45 (lymphocyte common antigen) is a receptor-linked protein tyrosine phosphatase that is expressed on all leucocytes, and which plays a crucial role in the function of these cells. On T cells the extracellular domain of CD45 is expressed in several different isoforms, and the particular isoform(s) expressed depends ...
journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
doi:10.1038/icb.1997.68
更新日期:1997-10-01 00:00:00
abstract::There are estimated to be 350 million chronic carriers of hepatitis B infection worldwide. Patients with chronic hepatitis B are at risk of liver cirrhosis with associated mortality because of hepatocellular carcinoma and other complications. An important goal, therefore, is the development of an effective therapeutic...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1111/j.0818-9641.2004.01278.x
更新日期:2004-10-01 00:00:00
abstract::As host immunological defenses are impaired during HIV infection, it is difficult to elicit good responses when attempting to develop therapeutic vaccines against HIV. To try to solve this situation, adjuvants, particularly cytokines, are currently under evaluation. Owing to the fact that adenosine deaminase (ADA) is ...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.2009.53
更新日期:2009-11-01 00:00:00
abstract::A murine monoclonal antibody has been used to characterise a 45,000 Da antigen that is associated with the surface membrane of merozoites of the human malaria parasite Plasmodium falciparum. The antigen is a glycoprotein and incorporates myristic acid. ...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1987.48
更新日期:1987-10-01 00:00:00
abstract::In the developing forebrain, mounting evidence suggests that neural stem cell proliferation and differentiation is regulated by growth factors. In vitro in the presence of serum, stem cell proliferation is predominantly mediated by fibroblast growth factor-2 (FGF-2) whereas neuronal differentiation can be triggered by...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1046/j.1440-1711.1998.00762.x
更新日期:1998-10-01 00:00:00
abstract::The differentiation of myeloid cells into macrophages and granulocytes is accompanied by marked changes in adhesive phenotype. Here we seek to understand the regulation of expression and functionality of the VLA-4 (alpha 4 beta 1), LPAM-1 (alpha 4 beta 7) and HML-1 (alpha E beta 7) integrins on monocytes/macrophages a...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1996.67
更新日期:1996-10-01 00:00:00
abstract::The central pathogenic feature of AIDS is the dramatic loss of CD4+ lymphocytes. Despite more than a decade of intense research, the exact mechanism by which HIV causes this is still not understood. A major model for T cell depletion, proposed originally by Ameison and Capron in a report published in 1991, is that HIV...
journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
doi:10.1046/j.1440-1711.1999.00798.x
更新日期:1999-02-01 00:00:00