کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9279421 | 1593515 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spinoculation of heparan sulfate deficient cells enhances HSV-1 entry, but does not abolish the need for essential glycoproteins in viral fusion
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موضوعات مرتبط
علوم زیستی و بیوفناوری
ایمنی شناسی و میکروب شناسی
ویروس شناسی
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چکیده انگلیسی
Cell surface heparan sulfate functions as a co-receptor in HSV-1 entry. In order to study its significance in context with specific gD receptors (nectin-1, HVEM, and 3-O-sulfated heparan sulfate) a low speed centrifugation based virus inoculation (spinoculation) method was used. The experiments were performed at 1200Â ÃÂ g using glycosylaminoglycan positive (GAG+) or deficient (GAGâ) cells expressing gD receptors. Clearly, spinoculation of GAGâ nectin-1 or HVEM cells enhanced significantly viral entry compared to similar but unspun cells. The enhanced entry was due to increased virus deposition at the cell surface and not due to pelleting of the virus. Among the gD receptors, spinoculated GAGâ HVEM cells showed restoration of HSV-1 entry compared to unspinoculated GAG+ HVEM cells. In contrast, spinoculated GAGâ nectin-1 cells showed less entry than unspinoculated GAG+ nectin-1 cells. GAGâ 3-O-sulfotransferase-expressing cells or heparinase treated GAG+ 3-O-sulfated heparan sulfate cells, in contrast, remained resistant to entry even after spinoculation. To investigate further, any potential effects of centrifugation on membrane fusion, a virus-free cell fusion assay was performed. Clearly, spinning had no effects on cell fusion, nor could it replace the need for all four essential glycoproteins. Taken together these results suggest that heparan sulfate plays a role of an attachment receptor, which could be substituted by spinoculation. This effect, however, varies with the gD receptor used, which in turn, could be used as a means for identifying gD receptor usage for entry into a cell type.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Virological Methods - Volume 128, Issues 1â2, September 2005, Pages 104-112
Journal: Journal of Virological Methods - Volume 128, Issues 1â2, September 2005, Pages 104-112
نویسندگان
Perry M. Scanlan, Vaibhav Tiwari, Susmita Bommireddy, Deepak Shukla,