Table 1

Effect of ambroxol on silica-induced nitric oxide production in macrophages

CompoundNitric Oxide (μM)
Without SilicaWith Silica
Control2.10  ± 0.084.18  ± 0.17
+ Ambroxol
  5 μM2.32  ± 0.131-a
  10 μM1.79  ± 0.111-a
  50 μM1.16  ± 0.121-a
  100 μM1.32  ± 0.091-a 0.89  ± 0.141-a
+ Staurosporine 100 nM2.16  ± 0.091.88  ± 0.211-a
+ Genistein 10 μM2.08  ± 0.053.00  ± 0.171-a
+ NMMA 500 μM0.45  ± 0.071-a 1.08  ± 0.151-a
+ L-NIL 50 μM0.46  ± 0.051-a 1.59  ± 0.181-a
+ L-NIL 100 μM0.38  ± 0.061-a 1.23  ± 0.061-a

Alveolar macrophages (3 × 105 cells) were incubated with various compounds in the presence or absence of 50 μg/ml silica for 6 h. Data represent mean ± S.E.M. of five and six replicate values in two separate experiments.

  • 1-a  Statistically different from intact macrophages or silica alone (P < 0.05).