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Molecules 2011, 16(8), 6489-6501; doi:10.3390/molecules16086489
Article

Inhibitory Effect and Possible Mechanism of Action of Patchouli Alcohol against Influenza A (H2N2) Virus

1, 1, 1, 1 and 2,*
1 Department of Endoscopy, the Third Affiliated Hospital, Harbin Medical University, Harbin 150040, China 2 Department of Anesthesiology, the Third Affiliated Hospital, Harbin Medical University, Harbin 150081, China
* Author to whom correspondence should be addressed.
Received: 13 May 2011 / Revised: 25 July 2011 / Accepted: 28 July 2011 / Published: 3 August 2011
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Abstract

In the present study, the anti-influenza A (H2N2) virus activity of patchouli alcohol was studied in vitro, in vivo and in silico. The CC50 of patchouli alcohol was above 20 µM. Patchouli alcohol could inhibit influenza virus with an IC50 of 4.03 ± 0.23 µM. MTT assay showed that the inhibition by patchouli alcohol appears strongly after penetration of the virus into the cell. In the influenza mouse model, patchouli alcohol showed obvious protection against the viral infection at a dose of 5 mg/kg/day. Flexible docking and molecular dynamic simulations indicated that patchouli alcohol was bound to the neuraminidase protein of influenza virus, with an interaction energy of –40.38 kcal mol–1. The invariant key active-site residues Asp151, Arg152, Glu119, Glu276 and Tyr406 played important roles during the binding process. Based on spatial and energetic criteria, patchouli alcohol interfered with the NA functions. Results presented here suggest that patchouli alcohol possesses anti-influenza A (H2N2) virus properties, and therefore is a potential source of anti-influenza agents for the pharmaceutical industry.
Keywords: patchouli alcohol; docking; neuraminidase; MTT; influenza virus; mice patchouli alcohol; docking; neuraminidase; MTT; influenza virus; mice
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Wu, H.; Li, B.; Wang, X.; Jin, M.; Wang, G. Inhibitory Effect and Possible Mechanism of Action of Patchouli Alcohol against Influenza A (H2N2) Virus. Molecules 2011, 16, 6489-6501.

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