کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
3299462 | 1209929 | 2006 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The Hepatitis C Envelope 2 Protein Inhibits LFA-1-Transduced Protein Kinase C Signaling for T-Lymphocyte Migration
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کلمات کلیدی
موضوعات مرتبط
علوم پزشکی و سلامت
پزشکی و دندانپزشکی
بیماریهای گوارشی
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![عکس صفحه اول مقاله: The Hepatitis C Envelope 2 Protein Inhibits LFA-1-Transduced Protein Kinase C Signaling for T-Lymphocyte Migration The Hepatitis C Envelope 2 Protein Inhibits LFA-1-Transduced Protein Kinase C Signaling for T-Lymphocyte Migration](/preview/png/3299462.png)
چکیده انگلیسی
Background & Aims: The ability of viruses to escape the host immune response represents a globally important problem related to a wide variety of pathogens. Hepatitis C is one of the major causes of liver disease worldwide. Clearance rates of this virus are low, and this condition normally involves a chronic inflammatory process. This raises a possibility that the virus may have developed mechanisms enabling it to evade T-cell-mediated immune surveillance. The aim of this study was to investigate the effect of the hepatitis C envelope protein E2 on LFA-1-stimulated T-cell migration and macrophage inflammatory protein (MIP-1α, MIP-1β) secretion. Methods: T cells were stimulated through the leukocyte function-associated molecule-1 (LFA-1) receptor by incubating with either intracellular adhesion molecule 1 (ICAM-1)-Fc fusion protein or anti-LFA-1 immobilized on 8-well chamber slides. Subcellular localization of protein kinase C (PKC)-β, CD81, and LFA-1 was determined by immunofluorescence analysis. Lipid raft formation was assessed using the Cellomics Kineticscan reader. MIP-1α and MIP-1β levels were detected by enzyme-linked immunosorbent assay. Results: We report that the hepatitis C envelope protein E2 can dramatically inhibit T-lymphocyte motility and chemokine release induced via LFA-1 integrin ligation. We have demonstrated a novel T-lymphocyte-directed viral inhibitory mechanism involving the PKC-β enzyme as a definitive intracellular target. E2-CD81 interaction stimulates translocation of PKC-β to lipid rafts, thereby preventing its association with the centrosome and microtubule cytoskeleton, which is crucial to the process of T-cell migration. Conclusions: These studies identify a mechanism whereby the hepatitis C virus can evade the host immune response by inhibition of T-cell migration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gastroenterology - Volume 130, Issue 2, February 2006, Pages 482-492
Journal: Gastroenterology - Volume 130, Issue 2, February 2006, Pages 482-492
نویسندگان
Yuri Volkov, Aideen Long, Michael Freeley, Lucy Golden-Mason, Cliona O'Farrelly, Anne Murphy, Dermot Kelleher,