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2016 ; 133
(ä): 62-72
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Discovery of cyclosporine A and its analogs as broad-spectrum anti-influenza
drugs with a high in vitro genetic barrier of drug resistance
#MMPMID27478032
Ma C
; Li F
; Musharrafieh RG
; Wang J
Antiviral Res
2016[Sep]; 133
(ä): 62-72
PMID27478032
show ga
As the number of drug-resistant influenza viruses continues to increase,
antivirals with novel mechanisms of action are urgently needed. Among the two
classes of FDA-approved antiviral drugs, neuraminidase (NA) inhibitors,
oseltamivir, zanamivir, and peramivir, are currently the only choice for the
prevention and treatment of influenza virus infection. Due to the antigenic drift
and antigenic shift, it will only be a matter of time before influenza viruses
become completely resistant to these NA inhibitors. In pursuing the next
generation of antiviral drugs with complementary mechanisms of action to those of
the NA inhibitors, we have identified a natural product, cyclosporine A (CsA)
(1), as a desired drug candidate. In this study, we discovered that CsA (1) and
its analogs have broad-spectrum antiviral activity against multiple influenza A
and B strains, including strains that are resistant to either NA or M2 inhibitors
or both. Moreover, CsA (1) displays a high in vitro genetic barrier of drug
resistance than oseltamivir carboxylate Mechanistic studies revealed that CsA (1)
acts at the intermediate step of viral replication post viral fusion. Its
antiviral mechanism is independent of inhibiting the isomerase activity of
cyclophilin A (CypA), and CsA (1) has no effect on the viral polymerase activity
The potent antiviral efficacy of CsA (1), coupled with the high in vitro genetic
barrier of drug resistance and novel mechanism of action, renders CsA (1) a
promising anti-influenza drug candidate for further development.
|Animals
[MESH]
|Antiviral Agents/chemistry/*pharmacology
[MESH]
|Cell Line
[MESH]
|Cyclosporine/chemistry/*pharmacology
[MESH]
|Dogs
[MESH]
|Drug Resistance, Viral
[MESH]
|Genome, Viral
[MESH]
|Genotype
[MESH]
|Humans
[MESH]
|Influenza A virus/classification/*drug effects/enzymology/genetics
[MESH]
|Influenza B virus/classification/*drug effects/enzymology/genetics
[MESH]