3.2 Biocompatibility Biocompatibility study of PHA film was tested with Vero cell, a monkey kidney cell line, as an animal testing model. Vero cells grown on tissue culture plate (TCP) presented a typical fibroblast morphology (Figure 2a). However, Vero cells were
unable to adhere on sodium hypochlorite casted film and consequently cell lysis was observed after 24 h (Figure 2b). It may cause from the toxicity of sodium hypochlorite, which still remain on PHA film, to animal cell. For chloroform casted film, Vero could attach on surface but they were unable to develop a normal fibroblast appearance. Accordingly, no cell proliferation on casted film was observed (Figure 2c)