Antiviral activity of diarylheptanoid stereoisomers against respiratory syncytial virus in vitro and in vivo
作者:Katsuhiko Konno、Motofumi Miura、Masaharu Toriyama、Shigeyasu Motohashi、Rie Sawamura、Wataru Watanabe、Hiroki Yoshida、Masahiko Kato、Ryuichi Yamamoto、Ken Yasukawa、Masahiko Kurokawa
DOI:10.1007/s11418-013-0743-6
日期:2013.10
We previously showed that (5S)-5-hydroxy-7-(4-hydroxyphenyl)-1-phenylhept-3-one (AO-0011) and (5S)-5-methoxy-1,7-diphenylhept-3-one (AO-0016) isolated from Alpinia officinarum exhibited stronger anti-influenza virus activity and anti-respiratory syncytial virus (RSV) activity, respectively, than the other isolated diarylheptanoids. In this study, we synthesized an enantiomer (AO-0503) and racemate (AO-0504) of AO-0011 and an enantiomer (AO-0514) of AO-0016. The anti-RSV activities of the three stereoisomers (AO-0503, AO-0504, and AO-0514) and AO-0011 were examined in vitro and in vivo to evaluate the stereoisomeric effect on anti-RSV activity. In a plaque reduction assay using human epidermoid carcinoma cells, all four diarylheptanoids significantly exhibited anti-RSV activity, and AO-0514 and AO-0016 exhibited stronger anti-RSV activity than AO-0503, AO-0504, and AO-0011. In a murine RSV infection model, all four diarylheptanoids with anti-RSV activity in vitro were also significantly effective in reducing virus titers in the lungs of RSV-infected mice. In the histopathological analysis of RSV-infected lungs, the oral administration of even AO-0514, which showed the lowest reduction of virus titers in the lungs, was significantly effective in reducing the infiltration of lymphocytes and in reducing the interferon-γ level, which is a marker of severity of pneumonia due to RSV infection, in bronchoalveolar lavage fluids prepared from RSV-infected mice. Although the stereoisomeric effects of diarylheptanoids on anti-RSV activity varied moderately, all four diarylheptanoids examined were suggested to ameliorate pneumonia and have a potential anti-RSV activity in vivo. They are possibly mother compounds for the development of an anti-RSV drug in the future.
的影响,但AO-0514和AO-0016表现出更强的抗RSV活性。在用人类表皮癌细胞进行的斑块减少试验中,所有四种二芳基庚烷均表现出显著的抗RSV活性,并且AO-0514和AO-0016表现出比AO-0503、AO-0504和AO-0011更强的抗RSV活性。在小鼠RSV感染模型中,所有四种在体外具有抗RSV活性的二芳基庚烷在降低感染RSV的小鼠肺部病毒滴度方面也表现出显著的效果。在对感染RSV的肺部进行组织病理学分析时,口服给药甚至AO-0514(其在肺部病毒滴度降低方面表现最低)在降低淋巴细胞浸润和降低因RSV感染引起的肺炎严重程度的标志物——支气管肺泡灌洗液中的干扰素-γ水平方面也表现出显著的效果。尽管二芳基庚烷对抗RSV活性的立体异构体效应的影响,但AO-0514和AO-0016表现出更强的抗RSV活性。在用人类表皮癌细胞进行的斑块减少试验中,所有四种二芳基庚烷均表现出显著的抗RSV活性,并且AO-0514和AO-0016表现出比AO-0503、AO-0