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dc.contributor.authorQuarmby, Steven L*
dc.contributor.authorKumar, Patricia*
dc.contributor.authorWang, Ji Min*
dc.contributor.authorMacro, Janet A*
dc.contributor.authorHutchinson, Jerry J*
dc.contributor.authorHunter, Robin D*
dc.contributor.authorKumar, Shant*
dc.date.accessioned2009-12-14T17:13:54Z
dc.date.available2009-12-14T17:13:54Z
dc.date.issued1999-03
dc.identifier.citationIrradiation induces upregulation of CD31 in human endothelial cells. 1999, 19 (3):588-97 Arterioscler. Thromb. Vasc. Biol.en
dc.identifier.issn1079-5642
dc.identifier.pmid10073961
dc.identifier.urihttp://hdl.handle.net/10541/87934
dc.description.abstractRadiation-induced vascular injury is believed to be a major factor contributing to parenchymal atrophy, fibrosis and necrosis in normal tissue after radiotherapy. In this study irradiation of human umbilical vein endothelial cells (HUVECs) significantly increased adherence of U-937 cells in a time-dependent manner. Given the potential multifunctional role of CD31 in the vasculature we have examined the possible effects of irradiation on levels of CD31 expression in HUVECs. Irradiation upregulated CD31 expression on HUVECs, independently of initial plating density and radiation-induced changes such as cell number, cell cycle stage, or cell size. CD31 mRNA levels were raised in irradiated HUVECs relative to controls. Both CD31 mRNA and surface protein showed similar changes, suggesting that the increase in mRNA in irradiated HUVECs is responsible for the elevation in cell surface protein. A semi-quantitative study of tissue specimens from patients who had received radiotherapy indicated that CD31 staining in the blood vessels from irradiated tissues was increased compared with controls. Endothelial CD31 is important in the transmigration of leukocytes. We have demonstrated that the incorporation of monoclonal antibody to CD31 significantly inhibited the transmigration of human peripheral blood leukocytes through a monolayer of irradiated HUVECs. Taken together these data strongly suggest that irradiation induces a marked increase in CD31 expression on endothelial cells as part of a general response to irradiation. Its upregulation may play an important role in the development of radiation-induced normal tissue damage and thus is a possible target for therapeutic intervention.
dc.language.isoenen
dc.subject.meshAlternative Splicing
dc.subject.meshAntibodies, Monoclonal
dc.subject.meshAntigens, CD31
dc.subject.meshBlotting, Northern
dc.subject.meshBlotting, Southern
dc.subject.meshCell Adhesion
dc.subject.meshCell Cycle
dc.subject.meshCell Movement
dc.subject.meshCell Size
dc.subject.meshEndothelium, Vascular
dc.subject.meshFibrosis
dc.subject.meshFlow Cytometry
dc.subject.meshGene Expression Regulation
dc.subject.meshHumans
dc.subject.meshLeukocytes
dc.subject.meshRNA, Messenger
dc.subject.meshReverse Transcriptase Polymerase Chain Reaction
dc.subject.meshU937 Cells
dc.subject.meshUmbilical Veins
dc.subject.meshUp-Regulation
dc.titleIrradiation induces upregulation of CD31 in human endothelial cells.en
dc.typeArticleen
dc.contributor.departmentDepartment of Pathological Sciences, University of Manchester, Christie Hospital, Metropolitan University of Manchester, Manchester, UK.en
dc.identifier.journalArteriosclerosis, Thrombosis, and Vascular biologyen
html.description.abstractRadiation-induced vascular injury is believed to be a major factor contributing to parenchymal atrophy, fibrosis and necrosis in normal tissue after radiotherapy. In this study irradiation of human umbilical vein endothelial cells (HUVECs) significantly increased adherence of U-937 cells in a time-dependent manner. Given the potential multifunctional role of CD31 in the vasculature we have examined the possible effects of irradiation on levels of CD31 expression in HUVECs. Irradiation upregulated CD31 expression on HUVECs, independently of initial plating density and radiation-induced changes such as cell number, cell cycle stage, or cell size. CD31 mRNA levels were raised in irradiated HUVECs relative to controls. Both CD31 mRNA and surface protein showed similar changes, suggesting that the increase in mRNA in irradiated HUVECs is responsible for the elevation in cell surface protein. A semi-quantitative study of tissue specimens from patients who had received radiotherapy indicated that CD31 staining in the blood vessels from irradiated tissues was increased compared with controls. Endothelial CD31 is important in the transmigration of leukocytes. We have demonstrated that the incorporation of monoclonal antibody to CD31 significantly inhibited the transmigration of human peripheral blood leukocytes through a monolayer of irradiated HUVECs. Taken together these data strongly suggest that irradiation induces a marked increase in CD31 expression on endothelial cells as part of a general response to irradiation. Its upregulation may play an important role in the development of radiation-induced normal tissue damage and thus is a possible target for therapeutic intervention.


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