کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5839348 1123993 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Liu-He-Tang inhibited plaque formation by human respiratory syncytial virus infection in cell lines of the human respiratory tract
موضوعات مرتبط
علوم پزشکی و سلامت داروسازی، سم شناسی و علوم دارویی داروشناسی
پیش نمایش صفحه اول مقاله
Liu-He-Tang inhibited plaque formation by human respiratory syncytial virus infection in cell lines of the human respiratory tract
چکیده انگلیسی

Ethnopharmacological relevanceLiu-He-Tang (LHT) has been used to treat adult respiratory tract infection with productive cough and fever for a thousand years in ancient China. Adults with respiratory tract infection of human respiratory syncytial virus (HRSV) can have symptoms similar to those managed by LHT. Therefore, LHT is supposed to be beneficial for adult HRSV infection. However, LHT does not have any antiviral activity to support its use against HRSV infection.Aim of the studyHRSV is the most important virus causing serious pediatric respiratory tract infections worldwide. HRSV also contributes considerably to respiratory tract illness in adults. There is no effective therapeutic modality against HRSV infection. In order to find readily available agents to manage adult HRSV infection, this study tested the hypothesis that LHT has antiviral activity against HRSV-induced cytopathy.Materials and methodsEffect of the hot water extract of LHT on HRSV was tested by plaque reduction assay in both human upper (HEp-2) and low (A549) respiratory tract cell lines and also a human normal fibroblast cell line (WI-38). Ability of LHT to stimulate anti-viral cytokines was evaluated by enzyme-linked immunosorbent assay (ELISA).ResultsLHT could dose-dependently inhibit HRSV-induced plaque formation (p < 0.0001), especially in A549 cell. 300 μg/ml LHT nearly abolished plaque formation in A549 cells. LHT was more effective when given before viral inoculation (p < 0.0001). LHT dose-dependently inhibited viral attachment (p < 0.0001). Besides, LHT could inhibit HRSV internalization both time-dependently and dose-dependently (p < 0.0001). Furthermore, LHT stimulated epithelial cells to secrete IFN-β and TNF-α to counteract HRSV infection before infection becomes established.ConclusionsLHT has anti-HRSV activity that provides a basic support of its possible use in managing adult HRSV infection.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Ethnopharmacology - Volume 137, Issue 3, 11 October 2011, Pages 1149-1155
نویسندگان
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