Oroxylin A shows limited antiviral activity towards dengue virus
Issued Date
2022-12-01
Resource Type
eISSN
17560500
Scopus ID
2-s2.0-85129445920
Pubmed ID
35509105
Journal Title
BMC Research Notes
Volume
15
Issue
1
Rights Holder(s)
SCOPUS
Bibliographic Citation
BMC Research Notes Vol.15 No.1 (2022)
Suggested Citation
Ratanakomol T., Roytrakul S., Wikan N., Smith D.R. Oroxylin A shows limited antiviral activity towards dengue virus. BMC Research Notes Vol.15 No.1 (2022). doi:10.1186/s13104-022-06040-0 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/83545
Title
Oroxylin A shows limited antiviral activity towards dengue virus
Author(s)
Other Contributor(s)
Abstract
Objective: The mosquito transmitted dengue virus (DENV) the causative agent of dengue fever (DF) remains a significant public health burden in many countries. Thailand, along with many countries in Asia and elsewhere, has a long history of using traditional medicines to combat febrile diseases such as DF. Screening bioactive compounds from traditional medicines reported to have antipyretic or anti-inflammatory activity may lead to the development of potent antivirals. In this study oroxylin A (OA), a flavonoid derivative found in Oroxylum indicum (commonly called the Indian trumpet flower or tree of Damocles), was screened for antiviral activity towards DENV. Results: Cytotoxicity analysis in BHK-21 cells showed a 50% cytotoxic concentration (CC50) of 534.17 µM. The compound showed no direct virucidal activity towards DENV, and pre-treatment of cells had no effect on virus production. A deficit was seen in virus production when cells were post-infection treated with oroxylin A. Under conditions of post-infection treatment, the EC50 value was 201.1 µM, giving a selectivity index (SI) value of 2.66. Accumulation of DENV E protein inside the cell was seen under conditions of post-infection treatment, suggesting that oroxylin A may exert some effects at the virus assembly/egress stages of the replication cycle.