RESUMO
Objective To explore the relationship between CD146(MCAM),microvessel density(MVD)in renal cell carcinoma(RCC) and its clinic-pathology,and to explore their correlation with clinic-pathologic parameter of RCC. Methods Immunohistochemisty was employed to determine the expression of CD146 and MVD in 43 RCC tissues and 20 normal control renal tissues. Results The positive expression of CD146 in RCC(90.7 ％,39/43) was remarkably higher than that in normal renal tissue(30.0 ％,6/20)(x2=27.77,P＜0.05).The expression of CD146 was not correlated with the category of RCC (x2=1.37,all P ＞0.05),but had a significant correlation to(the tumor volume x2=7.57)clinical stage(r=0.62) and metastasis of RCC(x2=19.99,P＜0.05). The MVD of RCC [(78.00±23.10)/200HP]was significantly higher than that of normal renal tissue [(23.05±7.93)/200HP].The MVD of CD146 was not correlated with the tumor volume and category of RCC (t=1.33,t=1.46,au P＞ 0.05),but had a significant correlation to clinical stage and metastasis of RCC (t=2.37,t=2.10,P＜ 0.05). There was a positive correlation between expression of CD146 and MVD in RCC(r=0.74,P＜0.05). Conclusion The overexpression of CD146 in RCC has a significant relation with tumor angiogenesis.The expression of CD146 and angiogenesis might serve as an important indicator of the development, progress and metastasis of RCC.
RESUMO
Four different strains of Leptospira were subcultured in CGM in contrast with in Korthof medium for three years. The antigenic components of these Leptospira grown in the two medium were analysed by the methods of MAT, CIE and SDS-PAGE. The results showed that:1, the antigenic components of Leptospira were very complex and had more than twenty bands stained with Coomassie brilIiant blue in SDS-FAGE pattern; 2. the antigenicity of Leptospira subcultured in CGM for many generations was relative stability and the same as that in Korthof medium.