The analysis of worm soluble antigens of Trichinella spiralis newborn larvae at different stages

Abstract

Objective To analyze the protein components and the immunoreactivity of Trichinella spiralis new born larva (NBL) soluble antigens at different stages in Dali,Yunnan.Methods The sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) was used to analyze protein components of the worm soluble antigens of NBL at different stages, and the Western-blot was used to analyze the immunoreactivity of the worm soluble antigens of NBL at different stages against T.spiralis infected rats.Results The results from SDS-PAGE analysis displayed that the worm soluble antigens of T.spiralis NBL on 24 h showed 36 protein bands with the range between Mr160000 and 10000,among which the 8 main bands were Mr73000,64000,58000,54000,46000,40000,34000 and 25000,respectively.The worm soluble antigens of T.spiralis NBL on 48 h displayed that 40 proteins bands with the range between 172000 and 10000,among which the 17 main bands were 120000,102000,89000,87000,79000,74000,72000,64000,58000,54000,46000,40000,34000,32000,25000,18000 and 10000,respectively.The results of Western-blot showed that 7 protein bands of the worm soluble antigens from T.spiralis NBL on 24 h reacted with the serum of rat anti-T.spiralis NBL.Whereas,14 protein bands of the worm soluble antigens from T.spiralis NBL on 48 h reacted with the serum of rat anti-T.spiralis NBL.Moreover,the negative serum had no cross-reactivity to corresponding proteins.Conclusion The worm soluble antigens of T.spiralis NBL on 24 h had 7 same protein components in comparison with NBL on 48 h.The protein components from the worm antigens of T.spiralis NBL increased during the development of the worm.Western-blot displayed that the serum of rat anti-T.spiralis NBL had stronger specific recognition to the 6 protein components from the worm soluble antigen of T.spiralis NBL both on 24 h and 48 h.Thus,these protein components had stronger immunoreactivity. Key words: Ttichinella spiralis; New born larvae; Worm soluble antigens; Protein components; Immunoreactivity