title: Organ-specific antigens of Clonorchis sinensis.
abstract: This study was carried out to find out specific proteins from different organs of Clonorchis sinensis. Crude extract, organ-specific and excretory-secretory (ES) proteins were analyzed by immunoblot with infected human sera. The bands of 7- and 17-kDa were main component of intestinal fluid and ES protein and commonly found in all organspecific proteins. The 17-kDa protein was observed from ES antigen, intestinal fluid, eggs and sperms, 26- and 28-kDa proteins were from the uterus, vitellaria, and ovary, and 34-, 37-, 43- and 50-kDa proteins were mainly from the testis and sperms. Serum of mice immunized with sperms reacted to the 50-kDa protein by immunoblotting and immunohistochemical staining showed a positive reaction at the seminal receptacle and seminiferous tubule. The present results show that the 7-kDa protein is a common antigen of every part or organ of C. sinensis, but different organs express their specific antigenic protein bands.
authors.affiliation: Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul 110-799, Korea.
authors.forename: Shunyu
authors.initials: S
authors.lastname: Li
authors.forename: Byung-Suk
authors.initials: BS
authors.lastname: Chung
authors.forename: Min-Ho
authors.initials: MH
authors.lastname: Choi
authors.forename: Sung-Tae
authors.initials: ST
authors.lastname: Hong
mesh_terms: D000818:Animals; D000947:Antigens, Helminth / Q000032:analysis*; D003004:Clonorchis sinensis / Q000033:anatomy & histology / Q000276:immunology*; D005260:Female; D006801:Humans; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D011817:Rabbits
chemical_list: D000947:Antigens, Helminth