Geldanamycin, an inhibitor of heat shock protein 90, inhibits chronic
ethanol-induced TH accumulation. A, cells were treated without
(lane 1) or with 100 mm ethanol for 24 h (lane
2), or with 100 mm ethanol for 24 h to which different doses
of GA were added for the last 9 h of ethanol treatment (lanes
3–5). TH protein levels were analyzed as described above. The
histogram depicts the mean percentage change in the ratio of TH to actin
± S.D. from three experiments. *, p < 0.05, lanes 2
versus 1, or 4 versus 2; **, p < 0.01, lanes 5
versus 2. B, cells were treated without (Con), or with
100 mm ethanol for 12 h (Et 12h) or 24 h (Et
24h), or 100 mm ethanol for 24 h in which 1 μm
GA was added for the last 9 h (Et 24h/GA 9h). Protein levels
of HSP90 and actin were measured by Western blot analysis. The histogram
depicts the mean ratio of HSP90 to actin ± S.D. from three
experiments.