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Background : Chikungunya virus (CHIKV) is a re-emerging pathogen that has caused widespread outbreaks affecting millions of people around the globe. Currently, there is no specific therapeutic drug against CHIKV, with symptomatic treatment only to manage the disease. Pi3-akt signaling has been implicated in infection of several viruses including that of CHIKV. Effect of Pi3-akt signaling inhibitors on CHIKV replication was evaluated in this study.    Methods : Human primary dermal fibroblast cells were treated with inhibitors of the Pi3-akt signaling pathway. Suppression of CHIKV replication was evaluated as reduction in virus titer in cell supernatants. Effect of miltefosine (MF) on CHIKV replication was evaluated in pre and post treatment regimen. Inhibition of virus replication was determined by cell growth, virus titer and western blot.    Results : Inhibition of Akt-phosphorylation significantly inhibited CHIKV replication. No effect on CHIKV replication was observed after treatment with Pi3-kinase and mTOR activation inhibitors. Further, MF, an FDA-approved Akt-inhibitor, inhibited CHIKV replication in pre- and post-infection treatment regimens.    Conclusion : Data suggests that Akt-phosphorylation can be an amenable target of therapy against CHIKV infection. This is the first study to show inhibition of CHIKV replication by MF, and presents a case for further development of MF as an anti-CHIKV drug.

Miltefosine inhibits Chikungunya virus replication in human primary dermal fibroblasts