Abstract: Three methods, ultra high pressure (UHP) treatment, UHP treatment followed by papain hydrolysis and concurrent UHP treatment and papain hydrolysis, were developed for eliminating allergens in water soluble protein extracted from Litopenaeus vannamei. One-factor-at-a-time and orthogonal array design methods were used to optimize the operating conditions. The effectiveness of the methods was examined by indirect enzyme-linked immunosorbent assay (ELISA). The optimal UHP treatment was performed under 150 MPa and for 35 min at 45 ℃ when used alone, and the OD492 nm of  antigen-antibody reaction was 0.1997. When used before papain hydrolysis, the optimal UHP treatment was performed under 350 MPa for 20 min at 45 ℃, and the OD492 nm of antigen-antibody reaction was 0.0492. When used concurrently with papain hydrolysis, the optimal UHP treatment was performed under 300 MPa for 35 min at 45 ℃, and the OD492 nm of antigen-antibody reaction was 0.05. These results demonstrate that UHP treatment followed by papain hydrolysis and their concurrent action were more effective in eliminating allergens in Litopenaeus vannamei. Therefore UHP has eliminating effect on allergens in Litopenaeus vannamei.

Key words: Litopenaeus vannamei, UHP treatment combined with enzymolysis, allergen elimination, ELISA