ObjectiveTo define the components of membranous labyrinth proteins which take part in the development of autoimmunity in experimental animals with autoimmune inner- ear disease(AIED). MethodsAn animal modee of AIED was es tablished by using homologous crude inner ear antigen to immune the guinea pig. The autoantibodies against inner ear antigenin the sera of animals were examined by immunoblotting assay. ResultsThe components of membranous labyrinth proteins were very complicated, which had five main bands in electrophoresis; most of immunized animals had only developed two sorts of autoantibod ies which were anti-68 kD and 136 kD membranous labyrinth proteins. There was no positive reaction in sera of control animals. Conclusion This results showed that the immune reactions against the 68 kD and 136 kD proteins of membranous labyrinth may be autoimmune bases for AIED in animals.

Objective: To study the correlation between the expression of CD44s, CD44v6 and theclinicopathological characters of laryngeal squamous cell carcinoma (LSCC) so as to analyze the role of them inoccurrence and progression of LSCC. Method:Expression of CD44 and CD44v6 in 46 cases of LSCC and 20 casesof adjacent normal tissues was inspected with immunohistochemical SP method. Result:The expression of CD44sincreased significantly in lymphnode metastasis group (94.4％) and stage Ⅲ～Ⅳ group (96.2％),but decreasedin non-lymphnode metastasis group (67.9％) and stage Ⅰ～Ⅱ group (55.0％). The expression of CD44v6 waslower (21.7％),which wasn′t associated with any clinicopathological characters. Conclusion:The role of CD44and CD44v6 in carcinoma maybe dependent on the species,type of carcinoma, and the expression of CD44s maybe a biologic marker to evaluate metastasis of LSCC.