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Sun X, Wu Y, Wang Y, Xue Q, Cheng X, Zhang G, Zhu Y, Wang X. β-1,4-Galactosyltransferase-I activates proliferation and participates in intercellular contacts of lymphocytes. Hum Immunol 2014; 75:1019-25. [DOI: 10.1016/j.humimm.2014.08.199] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 08/18/2014] [Accepted: 08/18/2014] [Indexed: 11/29/2022]
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2
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Han Y, Zhou X, Ji Y, Shen A, Sun X, Hu Y, Wu Q, Wang X. Expression of beta-1,4-galactosyltransferase-I affects cellular adhesion in human peripheral blood CD4+ T cells. Cell Immunol 2009; 262:11-7. [PMID: 20202494 DOI: 10.1016/j.cellimm.2009.08.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Revised: 07/23/2009] [Accepted: 08/12/2009] [Indexed: 10/20/2022]
Abstract
beta-1,4-galactosyltransferase-I (beta-1,4-GalT-I) has two isoforms that differ only in the length of their cytoplasmic domains. In this study, we found that both the long and short isoforms of beta-1,4-GalT-I were expressed in human CD4(+) T lymphocytes, and localized in the cytoplasm and on the plasma membrane. The expression level of beta-1,4-GalT-I was increased in CD4(+) T cells after stimulation with interleukin (IL)-2, and was further increased after stimulation with IL-2+IL-12, but decreased after stimulation with IL-2+IL-4 when compared to stimulation with IL-2 alone. We also demonstrated that the cellular adhesion of CD4(+) T cells was significantly increased upon cytokine stimulation, and was inhibited by alpha-lactalbumin, indicating that the increase in adhesion was positively correlated with the expression and activity of long beta-1,4-GalT-I. Collectively, the data suggest that beta-1,4-GalT-I plays a role in the cellular adhesion of CD4(+) T cells.
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Affiliation(s)
- Yu Han
- Department of Microbiology and Immunology, Medical School of Nantong University, 19 Qixiu Road, Nantong, Jiangsu 226001, PR China
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3
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Qian J, Cheng C, Liu H, Chen J, Yan M, Niu S, Qin J, Sun L, Liu L, Gu J, Shen A. Expression of beta-1,4-galactosyltransferase-I in rat during inflammation. Inflammation 2007; 30:59-68. [PMID: 17372842 DOI: 10.1007/s10753-007-9022-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2006] [Accepted: 01/22/2007] [Indexed: 01/24/2023]
Abstract
beta-1,4-Galactosyltransferase-I (beta-1,4-GalT-I) which is one of the best-studied glycosyltransferases, plays a key role in the synthesis of selectin ligands such as sialy Lewis (sLe( x )) and sulfated sLe( x ). Previous studies showed that inflammatory responses of beta-1,4-GalT-I-deficient mice were impaired because of the defect in selectin-ligand biosynthesis. However, the expression of beta-1,4-GalT-I during inflammation and its biological function remains to be elucidated. Real-time PCR showed that intraperitoneal administration of LPS strongly induced beta-1,4-GalT-I mRNA expression in the lung, heart, liver, spleen, kidney, lymph node, hippocampus, and testis, as well as in the cerebral cortex. In the rat lung, liver and testis, LPS stimulation of beta-1,4-GalT-I mRNA expression is time-dependent and biphasic. Lectin-fluorescent staining with RCA-I showed that LPS induced expression of galactose-containing glycans in rat lung and liver to the higher lever. Morphology analysis observed that galactose-containing glycans and beta-1,4-GalT-I mRNA was mostly expressed in neutrophils, macrophages and endothelial cells. These findings indicated that beta-1,4-GalT-I may play an important role in the inflammation reaction.
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Affiliation(s)
- Ji Qian
- Department of Microbiology and Immunology, Medical School of Nantong University (Former Nantong Medical College), Nantong 226001, People's Republic of China
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4
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Jin GB, Unfricht DW, Fernandez SM, Lynes MA. Cytometry on a chip: cellular phenotypic and functional analysis using grating-coupled surface plasmon resonance. Biosens Bioelectron 2006; 22:200-6. [PMID: 16455238 DOI: 10.1016/j.bios.2005.12.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2005] [Revised: 12/08/2005] [Accepted: 12/20/2005] [Indexed: 11/29/2022]
Abstract
Grating-coupled surface plasmon resonance imaging (GCSPRI) is a method for the accurate assessment of both cell phenotype and function. In GCSPRI, cells and/or proteins of interest are flowed across antibodies immobilized on a gold-coated sensor chip. The surface of the chip is illuminated with monochromatic light that couples with surface plasmons in the gold. At a specific angle of incidence, the GCSPR angle, the maximum amount of coupling occurs. Shifts in the GCSPR angle can be correlated with refractive index changes following cell or analyte capture by the immobilized antibodies. In addition, GCSPRI can image the cells as they are being captured. GCSPRI's multiplexed format allows for the parallel assessment of up to 400 individual antibody regions. In this paper, we demonstrate GCSPRI's ability to identify cells and proteins of interest and compare results to a traditional flow cytometry system. This technology represents a fast and powerful method for the simultaneous assessment of cell phenotype and function.
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Affiliation(s)
- Guang-bi Jin
- Department of Molecular and Cell Biology, University of Connecticut, Storrs, CT 06269-3125, United States
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5
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Oligonucleotide-microarray analysis of peripheral-blood lymphocytes in severe asthma. ACTA ACUST UNITED AC 2005; 145:263-74. [PMID: 15902098 DOI: 10.1016/j.lab.2005.02.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
CD4 + lymphocytes play a key role in asthma pathogenesis, but much remains unknown about the genetic mechanisms that affect disease severity. In this study we sought to investigate global patterns of gene expression in CD4 + lymphocytes isolated from subjects with severe asthma through the use of microarray technology. CD4 + lymphocytes were separated from peripheral blood, total RNA was purified, and biotinylated complementary RNA was prepared and hybridized to Affymetrix HU133 chips (Affymetrix, Santa Clara, Calif). Using the robust multi-chip average procedure, we compared the messenger RNA expression profiles of more than 33,000 genes of CD4 + lymphocytes in subjects with severe ( n = 5) and mild ( n = 5) asthma. Forty genes had 2-fold mean expression differences or greater. Thirty-seven genes were up-regulated, including transforming growth factor-beta and those involved in T-cell activation, proliferation, and cytoskeletal changes. Three genes were down-regulated, including the T-cell-receptor delta locus. This study demonstrates a method by which CD4 + lymphocytes can be extracted from blood for the purpose of microarray analysis. Furthermore, we show that T-lymphocytes from the peripheral blood of subjects with severe and mild asthma differ in their gene-expression profiles, supporting the view that asthma is a systemic disease. These differentially expressed genes identify potential molecular targets for preventive and therapeutic options for severe asthma.
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García-Vallejo JJ, van Dijk W, van Die I, Gringhuis SI. Tumor necrosis factor-alpha up-regulates the expression of beta1,4-galactosyltransferase I in primary human endothelial cells by mRNA stabilization. J Biol Chem 2005; 280:12676-82. [PMID: 15668241 DOI: 10.1074/jbc.m410093200] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
During the course of an inflammatory response, the pro-inflammatory cytokine tumor necrosis factor-alpha (TNFalpha) triggers endothelial cells to increase the expression levels of adhesion molecules that are pivotal for the rolling, adhesion, and transmigration of leukocytes over the endothelial cell wall. Here we show that TNFalpha, in addition, has a regulatory function in the biosynthesis of proper carbohydrate molecules on endothelial cells that constitute ligands for adhesion molecules on leukocytes. Our data show that TNFalpha induced an increase in the expression of beta1,4-galactosyltransferase-1 (beta4GalT-1) in primary human umbilical vein endothelial cells in a time- and concentration-dependent manner. The beta4GalT-1 mRNA up-regulation correlated with an increase in the Golgi expression and catalytic activity of the enzyme. Furthermore, an enhanced incorporation of galactose was observed in newly synthesized glycoproteins. Analysis of the molecular mechanism behind the up-regulation of beta4GalT-1 showed that the increase in mRNA levels is due to an enhanced stability of the transcripts. These data strongly demonstrate that TNFalpha modulates the glycosylation of endothelial cells by a mechanism that directly enhances the stability of beta4GalT-1 mRNA transcripts.
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Affiliation(s)
- Juan Jesús García-Vallejo
- Department of Molecular Cell Biology and Immunology, Vrije Universiteit Medical Centre, 1007 MB Amsterdam, The Netherlands.
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Kim U, Siegel R, Ren X, Gunther CS, Gaasterland T, Roeder RG. Identification of transcription coactivator OCA-B-dependent genes involved in antigen-dependent B cell differentiation by cDNA array analyses. Proc Natl Acad Sci U S A 2003; 100:8868-73. [PMID: 12857960 PMCID: PMC166405 DOI: 10.1073/pnas.1033108100] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The tissue-specific transcriptional coactivator OCA-B is required for antigen-dependent B cell differentiation events, including germinal center formation. However, the identity of OCA-B target genes involved in this process is unknown. This study has used large-scale cDNA arrays to monitor changes in gene expression patterns that accompany mature B cell differentiation. B cell receptor ligation alone induces many genes involved in B cell expansion, whereas B cell receptor and helper T cell costimulation induce genes associated with B cell effector function. OCA-B expression is induced by both B cell receptor ligation alone and helper T cell costimulation, suggesting that OCA-B is involved in B cell expansion as well as B cell function. Accordingly, several genes involved in cell proliferation and signaling, such as Lck, Kcnn4, Cdc37, cyclin D3, B4galt1, and Ms4a11, have been identified as OCA-B-dependent genes. Further studies on the roles played by these genes in B cells will contribute to an understanding of B cell differentiation.
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Affiliation(s)
- Unkyu Kim
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA
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Paulin Y, Boukhelifa M, Derappe C, Giner M, Font J, Aubery M. Activity of proximal promoter of the human beta(1)-integrin gene was increased in Sézary syndrome. Leuk Res 2001; 25:487-92. [PMID: 11337022 DOI: 10.1016/s0145-2126(00)00149-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Changes in beta1-integrin expression have been involved in abnormal cellular interactions between malignant lymphocytes from Sézary (Sz) patients and keratinocytes. In this paper, we compare the activity of both distal and proximal promoters of the beta1-integrin gene in malignant lymphocytes from Sz patients with human normal lymphocytes. Activity of both beta1-integrin promoters was also analysed in human normal keratinocytes. Northern blot analysis shows that beta1-integrin mRNA expression is higher in malignant Sz lymphocytes than in normal lymphocytes. CAT assays show that the activity of proximal beta1-integrin promoter is markedly increased (up to 6-fold) in malignant lymphocytes from Sz patients, in comparison to normal lymphocytes. These results suggest that changes in activity of the proximal promoter of beta1-integrin subunit could be, in part, responsible for the abnormal cellular interactions between malignant lymphocytes and keratinocytes observed in Sz syndrome.
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Affiliation(s)
- Y Paulin
- Laboratoire de Glycobiologie et Reconnaissance Cellulaire, Université René-Descartes Paris V, UFR Biomédicale des Saints-Pères, 45, rue des Saints-Pères, 75006, Paris, France
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Freitas M, Cayuela C, Antoine JM, Piller F, Sapin C, Trugnan G. A heat labile soluble factor from Bacteroides thetaiotaomicron VPI-5482 specifically increases the galactosylation pattern of HT29-MTX cells. Cell Microbiol 2001; 3:289-300. [PMID: 11298652 DOI: 10.1046/j.1462-5822.2001.00113.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The aim of this work was to set up and validate an in vitro model to study a molecular response of an intestinal host cell line (HT29-MTX), to a non-pathogen microflora component. We found that Bacteroides thetaiotaomicron strain VPI-5482 had the capacity to change a specific glycosylation process in HT29-MTX cells via a mechanism that involved a soluble factor. Differentiated HT29-MTX cells were grown in the presence of 20% of spent culture supernatant from the B. thetaiotaomicron during 10 days. Glycosylation processes were followed using a large panel of lectins and analysed using confocal microscopy, western blotting and flow cytometry techniques. Our results show that a B. thetaiotaomicron soluble factor modified specifically the galactosylation pattern of HT29-MTX cells, whereas other glycosylation steps remained mainly unaffected. Further characterization of this soluble factor indicates that it is a heat labile, low molecular weight compound. Reverse transcript-PCR (RT-PCR) analysis was unable to show any significant change in mRNA expression level of the main galactosyltransferases expressed in HT29-MTX cells. By contrast, galactosyltransferase activities dramatically increased in HT29-MTX cells treated by the soluble extract of B. thetaiotaomicron, suggesting a post-translational regulation of these activities. Our in vitro model allowed us to study the cross-talk between a single bacteria and intestinal cells. The galactosylation process appears to be a target of this communication, thus uncovering a new window to study the functional consequences of co-operative symbiotic bacterial-host interactions.
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Affiliation(s)
- M Freitas
- Danone VITAPOLE, 15 avenue Galilée, 92350 Le Plessis Robinson, France
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Pasqualetto V, Lemaire S, Neel D, Aubery M, Berger EG, Derappe C. Phorbol ester treatment of HL 60 leukemia cells results in increase of beta-(1 --> 4)-galactosyltransferase. Carbohydr Res 2000; 328:301-5. [PMID: 11072837 DOI: 10.1016/s0008-6215(00)00116-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We previously showed that HL 60 leukemia cells exhibit various changes in their cellular glycans after phorbol 12-myristate 13-acetate (PMA) treatment. These changes could originate largely from changes in one or several glycosyltransferases. In this report, we show using enzymatic measures, fluorescence microscopy, immunoblotting and Northern blot that beta-(1 --> 4)-galactosyltransferase I (GalT I) activity was higher (> x 2) in PMA-treated compared with untreated HL 60 cells. Immunoblotting showed an increased intensity of the GalT I band at 49 kDa and Northern blot a weak increase of the GalT I transcript band, after PMA treatment. Moreover, Northern blot performed after actinomycin-D treatment of the cells, which inhibits transcription, suggests that the observed increase of GalT I expression could originate, in part, from increase of the stability of GalT I transcripts.
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Affiliation(s)
- V Pasqualetto
- Université de Paris V-René Descartes, UFR Biomédicale des Saints-Pères, France
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11
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Braut-Boucher F, Font J, Pichon J, Paulin Y, Boukhélifa M, Aubery M, Derappe C. T lymphocytes from Sézary syndrome patients express beta1 integrins whose beta(1-6)-branched N-linked oligosaccharides reflect their adhesive capacity. Leuk Res 1998; 22:947-52. [PMID: 9766755 DOI: 10.1016/s0145-2126(98)00094-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Sézary syndrome (Sz), characterized by slowly progressing clonal proliferation of CD4+, CD45 RO+ T cells, has several forms that are distinguished according to the epidermotropic properties of the pathological cells. In a recent paper (Derappe C, Haentjens G, Lemaire S, Feugeas JP, Lebbe C, Pasqualetto V, Bussel A, Aubery M, Néel D. Leukemia 1996;10:138), we observed that T lymphocytes from most of the Sézary patients [Szbeta(1-6)+] expressed high levels of beta(1-6)-GlcNAc-branched N-linked oligosaccharides while T lymphocytes from other patients [Szbeta(1-6)-] did not. Because this observation suggests the possibility of two forms of Sz, distinguished according to the expression rate of these glycans, we looked for a possible relationship between this expression rate and T-cell adhesiveness. Using an original protocol (Braut-Boucher F, Pichon J, Rat P, Adolphe M, Aubery M, Font J. J Immunol Methods 1995;178:41), we observed that T lymphocytes obtained from the Szbeta(1-6)+ patients adhered less to normal keratinocyte monolayers than T lymphocytes from Szbeta(1-6)- patients and normal donors. As assessed by FACS analysis, all the integrin-subunits studied were more expressed on Szbeta(1-6)-, especially alpha4, alpha5, beta1 and beta2, than on Szbeta(1-6)+ and normal lymphocytes. Although these results suggest that beta1- and beta2-integrin expression is involved in the adhesive properties of these T-cells, other factors, such as glycosylation, may also contribute. To demonstrate this possibility, we sought the presence of beta(1-6)-GlcNAc-branched N-linked oligosaccharides on beta1 integrins expressed by T lymphocytes from Sz patients. Immunoblot experiments, performed using the specific lectin from Phaseolus vulgaris (Leukoagglutinin form), showed that only the beta1 integrin subunit expressed by T lymphocytes from Szbeta(1-6)+ patients carried these glycans, supporting the concept of the involvement of T-cell glycosylation in the evolution of Sz.
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Affiliation(s)
- F Braut-Boucher
- Laboratoire de Glycobiologie et Cancérologie Cellulaires, Université René-Descartes-Paris V, UFR Biomédicale, France
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