Abstract:
:T cell polarization and redistribution of cellular components are critical to processes such as activation, migration, and potentially HIV infection. Here, we investigate the effects of CD4 engagement on the redistribution and localization of chemokine receptors, CXCR4 and CCR5, adhesion molecules, and lipid raft components including cholesterol, GM1, and glycosyl-phosphatidylinositol (GPI)-anchored proteins. We demonstrate that anti-CD4-coated beads (alpha CD4-B) rapidly induce co-capping of chemokine receptors as well as GPI-anchored proteins and adhesion molecules with membrane cholesterol and lipid rafts on human T cell lines and primary T cells to the area of bead-cell contact. This process was dependent on the presence of cellular cholesterol, cytoskeletal reorganization, and lck signaling. Lck-deficient JCaM 1.6 cells failed to cap CXCR4 or lipid rafts to alpha CD4-B. Biochemical analysis reveals that CXCR4 and LFA-1 are recruited to lipid rafts upon CD4 but not CD45 engagement. Furthermore, we also demonstrate T cell capping of both lipid rafts and chemokine receptors at sites of contact with HIV-infected cells, despite the binding of an HIV inhibitory mAb to CXCR4. We conclude that cell surface rearrangements in response to CD4 engagement may serve as a means to enhance cell-to-cell signaling at the immunological synapse and modulate chemokine responsiveness, as well as facilitate HIV entry and expansion by synaptic transmission.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Nguyen DH,Giri B,Collins G,Taub DDdoi
10.1016/j.yexcr.2004.11.022keywords:
subject
Has Abstractpub_date
2005-04-01 00:00:00pages
559-69issue
2eissn
0014-4827issn
1090-2422pii
S0014-4827(04)00700-1journal_volume
304pub_type
杂志文章abstract::Allograft Inflammatory Factor-1 (AIF-1) is a cytoplasmic calcium-binding protein expressed in vascular smooth muscle cells (VSMC) in response to injury or cytokine stimulation. AIF-1 contains a partially conserved EF-hand calcium-binding domain, and participates in VSMC activation by activation of Rac1 and induction o...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2005.03.002
更新日期:2005-07-01 00:00:00
abstract::A monoclonal antibody raised against microtubule-associated protein-1 (MAP-1) binds to nuclei of normal human fibroblasts, its binding site being detected as intranuclear immunofluorescent dots. The percentage of cells showing these dots increased with insulin, hydrocortisone, epidermal growth factor (EGF), and transf...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(85)90480-x
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journal_title:Experimental cell research
pub_type: 杂志文章
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abstract::Hypopharyngeal squamous cell carcinoma (HSCC) is a relatively rare malignancy and has the worst prognosis among head and neck cancer. Metastasis is the major cause of poor prognosis in HSCC patients. In this study, we found that 3-phosphoinositide-dependent protein kinase 1 (PDK1 or PDPK1) was overexpressed in HSCC. T...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2019.111746
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abstract::Senescent human diploid fibroblasts, TIG-1, had labelling indices of about 0.5-3% when labelled with [3H]thymidine for 3 days in fresh medium containing 10% fetal bovine serum. When these cells were infected with SV40, the percentage of nuclei incorporating [3H]thymidine increased by about 10-fold. The frequency of T-...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(83)90450-0
更新日期:1983-03-01 00:00:00
abstract::Two genes, KIN1 and KIN2, were isolated in Saccharomyces cerevisiae by their homology to the protein kinase family of viral oncogenes. In previous studies, we identified the yeast KIN1 gene product (pp145KIN1) and KIN2 gene product (pp145KIN2) as 145 kDa phosphoproteins with serine/threonine protein kinase activity. W...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1994.1177
更新日期:1994-07-01 00:00:00
abstract::In this study, a somatic cell genetic approach was used to study the regulation of liversolidusbonesoliduskidney alkaline phosphatase (ALPL) gene expression in osteoblasts. ALPL plays an important role in skeletal mineralization and serves as a good index of bone formation. A series of intertypic hybrids constructed b...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:
更新日期:1996-07-10 00:00:00
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journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(92)90350-h
更新日期:1992-07-01 00:00:00
abstract::The effects of non-drug-containing liposomes of different compositions and sizes on the proliferation of nine cancer-derived and one normal cultured human cell lines were determined. Stearylamine- and cardiolipin-containing liposomes were toxic (ID50) at 200 microM liposomal lipid concentrations or less, whereas phosp...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(87)90262-x
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journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1994.1247
更新日期:1994-09-01 00:00:00
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journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(88)90357-6
更新日期:1988-11-01 00:00:00
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journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2003.12.016
更新日期:2004-04-15 00:00:00
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journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1999.4566
更新日期:1999-08-25 00:00:00
abstract::A monoclonal antibody, G8, which recognizes a form of tubulin (G8-tubulin) with a novel distribution in Rat-1 cells and Potorous tridactylis kidney (Ptk-2) cells was isolated. G8 labeled the interphase cytoskeleton of Rat-1 fibroblasts but not mitotic spindles or midbodies. G8 also stained a fiber network in some but ...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(89)90345-5
更新日期:1989-10-01 00:00:00
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journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/0014-4827(83)90355-5
更新日期:1983-12-01 00:00:00
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journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1993.1296
更新日期:1993-11-01 00:00:00
abstract::The formation of capillaries during development and tissue repair is likely to involve active reorganization of the actin cytoskeleton, although few studies have addressed this issue. Here, we have utilized an in vitro model of capillary morphogenesis whereby human umbilical vein endothelial cells are suspended within...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1999.4460
更新日期:1999-05-25 00:00:00
abstract::Mutation R453W in A-type lamins, that are major nuclear envelope proteins, generates Emery-Dreifuss muscular dystrophy. We previously showed that mouse myoblasts expressing R453W-lamin A incompletely exit the cell cycle and differentiate into myocytes with a low level of multinucleation. Here we attempted to improve d...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2008.01.018
更新日期:2008-04-01 00:00:00
abstract::The effect of hydrocortisone (HC) on PDGF beta-receptor expression was studied in the human malignant mesothelioma cell line Mero-14. HC was found to induce a time- and dose-dependent increase of PDGF beta-receptor mRNA. Nuclear run off analysis revealed that HC induced increased transcription of the PDGF beta-recepto...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/s0014-4827(05)80074-6
更新日期:1992-05-01 00:00:00
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journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1997.3644
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abstract::Deregulation of the bone morphogenetic protein (BMP) pathway has been documented in colorectal cancer (CRC). Previously, we investigated possible associations between urokinase-type plasminogen activator (uPA) deficiency and expression of extracellular constituents of BMP signaling in a newly developed mouse model of ...
journal_title:Experimental cell research
pub_type: 杂志文章
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journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1998.4156
更新日期:1998-10-10 00:00:00
abstract::The NF-kappaB/RelA family of transcription factors regulates inducible transcription of a large number of genes in response to diverse stimuli. Little is known, however, about the location of NF-kappaB in the cytoplasm and the transport mechanism to the nucleus. We found that NF-kappaB is associated with the actin-bin...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2007.12.001
更新日期:2008-03-10 00:00:00
abstract::Tetrahymena 14-nm filament-forming protein (49K protein) is a structural protein which is involved in activity of the pronuclei during conjugation (O. Numata, T. Sugai, and Y. Watanabe (1985) Nature (London) 314, 192-194). Using monoclonal and polyclonal antibodies, we here demonstrate the presence of a cross-reactive...
journal_title:Experimental cell research
pub_type: 杂志文章
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abstract::The linker histone subtype H1.1 belongs to the group of main-type histones and is synthesized in somatic tissues as well as in germ cells during the S phase of the cell cycle. In adult mice the histone gene H1.1 is expressed mainly in thymus, spleen, and testis. The single-copy gene coding for the H1.1 protein was eli...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1999.4767
更新日期:2000-02-25 00:00:00
abstract::Tubular epithelial-to-mesenchymal transition (EMT) plays a crucial role in the progression of renal tubular interstitial fibrosis (TIF), which subsequently leads to chronic kidney disease (CKD) and eventually, end-stage renal disease (ESRD). We propose that augmenter of liver regeneration (ALR), a member of the newly ...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2014.07.001
更新日期:2014-10-01 00:00:00
abstract::U73122, a phospholipase C inhibitor, dose dependently blocks the cGMP-induced Ca2+ release in sea urchin eggs and homogenates. U73122 inhibition was prevented by cotreatment with dithiothreitol (DTT), but DTT is ineffective when eggs or homogenates were pretreated with U73122. U73122 action is different from the other...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1998.4070
更新日期:1998-07-10 00:00:00
abstract::Matrix metalloproteinases (MMPs) play a key role in cellular invasion and growth. Recent observations on tumor tissue samples suggest that MMP activity is altered in relation to cell density. Therefore, we examined MMP(-1,-2,-3,-8,-9,-10,-11 and -13) and TIMP-1/-2 expression of well-defined cell densities in breast ca...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1016/j.yexcr.2004.12.019
更新日期:2005-04-15 00:00:00
abstract::In preliminary experiments it was established that the hypertrophic and hyperplastic responses of neonatal cardiac myocytes in culture were associated with enhanced expression of IGF-1 and IGF-1 receptors in these cells. Therefore, to determine the role of IGF-1 receptors on myocyte growth, cells were exposed to antis...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1994.1343
更新日期:1994-12-01 00:00:00
abstract::The double-stranded RNA-dependent kinase, PKR, is encoded by an interferon inducible gene and is largely responsible for the anti-viral effects of this cytokine. Recent studies have shown that PKR may also play a role in the regulation of normal cellular growth. Although numerous examples of viral strategies for inact...
journal_title:Experimental cell research
pub_type: 杂志文章
doi:10.1006/excr.1998.4201
更新日期:1998-11-01 00:00:00