Figure 6.

Fine morphological structure of A549 cells with or without apoptosis. The electron micrographs showed that (a) mature A549 cells were generally flat with irregular surfaces; (b) A549 progenitor cells were round with regular or irregular surfaces; (c, d) apoptotic A549 cells had blebs on their surfaces. (e) Semi-thin section of A549 cells with toluidine blue staining showing the HZ-treated apoptotic cells (*). HZ pigment deposited in the pneumocytes was frequently found in the HZ and HZ-IL-1β treatment groups (f). (A color version of this figure is available in the online journal.)