Objective To evaluate effect of the non-fused recombinant antigen in immuno diagnosis of echinococcosis. Methods The coding sequence of the target gene was cloned into prokaryotic non-fusion expression vector pQE30 ( + ) and expressed in E. coli. The recombinant protein was identified by SDS-PAGE and Western Blot, purified with affinity chromatography and used in ELISA to detect specific antibody in patients' sera. Results SDS-PAGE and Western blot demonstrated that Echinococcus multilocularis immunodominant major surface antigen gene was highly expressed in E. coli. The result of ELISA showed that out of 68 echinococcosis sera, 66 samples (97.1% ) were detected positively by the assay. Only 2 samples (2% ) were positive in 100 sera from cases with other infective diseases including cysticercosis or healthy persons. The sensitivity and specificity of the assay were 97.1% and 98% respectively. Conclusion Echinococcus multilocularis immunodominant major surface antigen gene has been highly expressed in E. coli in non-fusion form. ELISA with the recombinant protein is highly sensitive and genus-specific for echinococcosis diagnosis.

OBJECTIVE: To investigate the expression of interleukin 17 in laryngeal squamous cell carcinoma tissues, and to evaluate the value of interleukin-17 in the biological behavior and prognosis of laryngeal squamous cell carcinoma. METHOD: Expressions of IL-17 were analyzed in 71 laryngeal squamous cell carcinoma samples and 21 cases of adjacent tissues of carcinoma as control by immunohistochemistry. RESULT: The expression of IL-17 in laryngeal squamous cell carcinoma tissues was obviously higher than that in adjacent tissues (P < 0.05). The expression of IL-17 was associated with tumor T staging, tumor differentiation, regional lymph node metastasis, distant metastasis and recurrence (P < 0.05). Log-rank test showed that the prognosis of patients was related to the primary tumor site, tumor stage, regional lymph node metastasis, distant metastasis and IL-17 expression (P < 0.05), While Cox multiple factors analysis showed that IL-17 was not an independent prognostic factors. CONCLUSION The expression of IL-17 may be the vital index in laryngeal squamous cell carcinoma, and it can provide some theoretical basis for the anti-tumor immunotherapy for laryngeal squamous cell carcinoma.
Adult ; Aged ; Aged, 80 and over ; Carcinoma, Squamous Cell ; metabolism ; pathology ; Female ; Humans ; Interleukin-17 ; metabolism ; Laryngeal Neoplasms ; metabolism ; pathology ; Male ; Middle Aged ; Prognosis