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Table 2 Inhibitory effects of AK extracts and AK fractions on neuraminidase from recombinant influenza virus A (rvH1N1).

From: In Vitro inhibitory activity of Alpinia katsumadai extracts against influenza virus infection and hemagglutination

Extracts and layers

IC50 (μg/mL) a

EtOH extract (AK-1)

153.1 ± 22.1

EtOAc fraction (AK-2)

13.2 ± 2.0

H2O fraction (AK-3)

25.0 ± 4.1

40% methanol fraction (AK-5)

13.8 ± 2.4

H2O extract (AK-9)

20.4 ± 0.7

Polysaccharide fraction (AK-10)

62.6 ± 4.2

Supernatant fraction (AK-11)

-

  1. a All extracts and fractions were examined in a set of duplicated experiment; IC50 values of extracts and fractions represent the concentration that caused 50% enzyme activity loss.