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Antiviral Activities of Compounds Isolated from Pinus densiflora (Pine Tree) against the Influenza A Virus
| Content Provider | MDPI |
|---|---|
| Author | Ha, Thi Kim Quy Lee, Ba Wool Nguyen, Ngoc Hieu Cho, Hyo Moon Venkatesan, Thamizhiniyan Doan, Thi Phuong Kim, Eunhee Oh, Won Keun |
| Copyright Year | 2020 |
| Description | Pinus densiflora was screened in an ongoing project to discover anti-influenza candidates from natural products. An extensive phytochemical investigation provided 26 compounds, including two new megastigmane glycosides (1 and 2), 21 diterpenoids (3–23), and three flavonoids (24–26). The chemical structures were elucidated by a series of chemical reactions, including modified Mosher’s analysis and various spectroscopic measurements such as LC/MS and 1D- and 2D-NMR. The anti-influenza A activities of all isolates were screened by cytopathic effect (CPE) inhibition assays and neuraminidase (NA) inhibition assays. Ten candidates were selected, and detailed mechanistic studies were performed by various assays, such as Western blot, immunofluorescence, real-time PCR and flow cytometry. Compound 5 exerted its antiviral activity not by direct neutralizing virion surface proteins, such as HA, but by inhibiting the expression of viral mRNA. In contrast, compound 24 showed NA inhibitory activity in a noncompetitive manner with little effect on viral mRNA expression. Interestingly, both compounds 5 and 24 were shown to inhibit nitric oxide (NO) production and inducible nitric oxide synthase (iNOS) expression in a dose-dependent manner. Taken together, these results provide not only the chemical profiling of P. densiflora but also anti-influenza A candidates. |
| Starting Page | 711 |
| e-ISSN | 2218273X |
| DOI | 10.3390/biom10050711 |
| Journal | Biomolecules |
| Issue Number | 5 |
| Volume Number | 10 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-05-04 |
| Access Restriction | Open |
| Subject Keyword | Biomolecules Integrative and Complementary Medicine Pinus Densiflora Anti-influenza Neuraminidase H1n1 Cytopathic Effect Anti-inflammation |
| Content Type | Text |
| Resource Type | Article |
