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이옥란 순천향의학연구소 2002 Journal of Soonchunhyang Medical Science Vol.8 No.2
This study was conducted to determine the worm tissue locality and antigenicity of 16~18kDa protein fraction separated from soluble crude antigen of Paragonimus iloktsuenensis. This fraction was obtained by SDS-PAGE, and regarded as the main antigenic protein fraction of D1 antigen seen in the early infection period (between 2~4 weeks of infection). After performing SDS-PAGE with soluble crude antigen, immune antibody (16~18-Ig) was prepared by immunizing gel antigenic emulsion(16~18A) of 16~18kDa protein fraction into a rabbit, and immune responses of worm tissues (tegument, intestinal epithelium, and vitelline gland) were observed using the immunogold labeling method. The results showed that 16~18kDa antigenic protein was present in all the tissues in which this protein was scarcely contained in the tegument, intestinal epithelium and vitelline gland. The antigenicity of intestinal tissue was significantly weak as compared with crude antigen(PIA). Although tissue antigenicity was not strong compared with the amount of protein, we believe that 16~18kDa antigenic protein was the main antigenic protein, being 64% of D1 antigenic protein and that the strong antigenicity of soluble antigen before the development of the vitelline gland(2 weeks before) was decided from this 16~18kDa antigenic protein originated from intestinal tissue.