RESUMEN
BACKGROUND:In the cytotoxicity test of the mussel adhesive protein dressing for wound healing, because of positive charge properties of the protein, when extracting ratio is 1:9, the cel s exhibit poly-group phenomenon that results in errors in the cytotoxicity test of mussel adhesive protein samples. OBJECTIVE:According to the existing standards, to improve the leaching proportion and pretreatment of mussel adhesive protein dressing for wound healing based on the special properties and working condition of mussel adhesive protein. METHODS:(1) Extract method:Extract solution of mussel adhesive protein dressing was prepared with mussel adhesive protein dressing and cel medium at extracting ratios of 1:9 and 1:131. Then, L929 cel s were cultured in extract solutions of mussel adhesive protein dressing, natural latex and high-density polyethylene, respectively. (2) Method of direct contact:Distil ed water, solutions of mussel adhesive protein dressing, dimethyl sulfoxide and cel medium were used to culture L929 cel s. RESULTS AND CONCLUSION:When the extracting ratio was 1:9, the cel s agglomerated which is not suitable for cytotoxicity test. When the extracting ratio was 1:131, flocculated sediment and cel aggregation disappeared, the cytotoxicity test results showed no cytotoxicity with higher reliability. Direct contact method showed the samples had no cytotoxicity. The extract method with adjusted extracting radio or direct contact method can be applied to test the in vitro cytotoxicity of mussel adhesive protein dressing for wound healing.