Immunofluorescence of ZO-1 (red), claudin-1, claudin-5 and claudin-7(green) in NHBE, exposed to 100mM alcohol for 24 hours ± Gö-6976, a PKCα inhibitor, or myristolated-Zeta, a PKCζ inhibitor (Note: Images are compressed Z stacks). Both ZO-1 and claudin-1 are localized to the cell membrane in control cells. Exposure to 100mM alcohol reduced ZO-1, claudin-1, claudin-5 and claudin-7 localization at the plasma membrane in alcohol-treated NHBE cells. In addition there also appears to be a shift in membrane localization of ZO-1 and claudins to a cytoplasmic localization in NHBE cells. Pretreatment with Gö-6976 prevented ZO-1, claudin-1, claudin-5, and claudin-7 alcohol-induced protein changes, while myristolated- Zeta did not. Bar equals 10μm.