잔나비걸상 Elfvingia applananta 자실체의 수용성성분 EA의 varicella zoster virus(Oka strain; VZV/oka)에 대한 항바이러스효과를 plaque reduction assay에 따라 실험한 결과 EA는 용량의존적으로 plaque 형성을 억제하였으며 $EC_{50}$는 $464.14;{mu}g/ml$이었다. EA와 단백질성 항바이러스제인 interferon(IFN) alpha 및 IFN gamma와의 병용시험 결과, 단독처리시와 병용처리시에 m(slope) value가 서로 유사한 값을 보였으므로 이들은 상호 배타적인 약물(mutually exclusive drug)임을 알 수 있었고, IFN alpha와의 병용시 combination index(CI)는 f(a)가 0.50에서 0.90인 유효농도 범위내에서 $0.83{sim}1.09$의 값을 나타내어 부분적 상승 또는 상가효과를 보였으며, IFN gamma와의 병용시에는 $1.20{sim}1.24$를 나타내어 길항효과를 보였으므로, IFN alpha와의 병용이 IFN gamma와의 병용보다 더 우수한 병용효과를 나타내었다.
To search for less toxic antiviral agents from Basidiomycetes, the water soluble components (=EA), were isolated from the carpophores of Elfvingia applanata (Pers.) Karst. Anti-varicella zoster virus (Oka strain; anti-VZV/Oka) activity of EA was examined in MRC-5 cells by plaque reduction assay in vitro. And the combined antiviral effects of EA with interferon (IFN) alpha or IFN gamma were examined on the multiplication of VZV/Oka. EA exhibited a dose-dependent reduction in the plaque formation of VZV/Oka with 50% effective concentration $(EC_{50})$ of $464.14;{mu}g/ml$. The results of the combination assay were evaluated by the combination index (CI) that was calculated by the multiple drug effect analysis. The combination of EA with IFN alpha showed partially synergistic or additive effects with CI values of $0.83{sim}1.09$ for 50%, 70%, 90% effective levels, and those with IFN gamma showed antagonism with CI values of $1.20{sim}1.24$.
