AlM: To investigate expressions of matrix metalloproteinase-2 ( MMP-2 ) and extracellular matrix metalloproteinase inducer ( EMMPRlN) in retinoblastoma (Rb) and the relationships between MMP-2, EMMPRlN and tumor development.METHODS:lmmunohistochemical technique was used to detect expressions of MMP-2 and EMMPRlN in 39 cases of paraffin embedded Rb samples. Quantitative analysis of expressions of MMP-2 and EMMPRlN were assessed by measuring the mean gray scale of Rb tissue with LElCA lM50 Color Pathologic Analysis System. The differences of expressions of MMP-2 and EMMPRlN in each clinical and pathological stage were statistically analyzed, and the same step was also undertaken to study the relationship between Rb with MMP-2 positive expression and that with EMMPRlN positive expression.RESULTS:The positive expression rate of MMP-2 was 90% (Gray value: 109. 64 ± 14. 52; 35/39), and that of EMMPRlN was 85% (Gray value:108. 01±13. 60;33/39). The expressions of MMP - 2 and EMMPRlN were significantly higher in tumors of glaucomatous stage (Gray value:108. 21±11. 47 and 107. 56±14. 32) than those in intraocular stage ( Gray value: 121. 13 ± 11. 32 and 119. 34 ± 12. 66; P<0. 01 and P<0. 05). And the same conclusion can be concluded between those in extraocular stage (Gray value: 91. 03 ± 11. 71 and 92. 26 ± 12. 93) with those in glaucomatous stage (P<0. 01 and P<0. 05). The expressions of MMP-2 and EMMPRlN were significantly higher in tumors with optic nerve invasion (Gray value:103. 89±13. 39 and 105. 23±14. 00) than those without optic nerve invasion ( Gray value: 118. 39 ± 15. 11 and 117. 53±16. 13) (P<0. 01 and P<0. 05).CONCLUSlON:The positive expression levels of MMP-2 and EMMPRlN may correlate with tumor infiltration and metastasis.%目的：：探讨基质金属蛋白酶-2( matrix metalloproteinase-2, MMP-2)和细胞外基质金属蛋白酶诱导因子(extracellular matrix metalloproteinase inducer,EMMPRIN)在视网膜母细胞瘤( retinoblastoma,Rb)中的表达及其与临床病程的关系。方法：用免疫组织化学 SABC 法分别检测39例 Rb 中MMP-2及EMMPRIN的表达；用LEICA IM 50型全自动医学图像分析系统测量其平均灰度值,比较不同临床和病理阶段Rb中表达MMP-2和EMMPRIN的差异及二者阳性表达之间的关系。结果：Rb患者39例中MMP-2阳性表达35例(灰度值为109.64±14.52),占90％；EMMPRIN阳性表达33例(灰度值为108.01±13.60),占85％；青光眼期Rb中MMP-2和EMMPRIN 的表达(灰度值分别为108.21±11.47,107.56±14.32)明显高于眼内期(灰度值分别为121.13±11.32,119.34±12.66；P<0.01,P<0.05),眼外期二者表达(灰度值分别为91.03±11.71,92.26±12.93)明显高于青光眼期(P<0.01,P<0.05)；视神经浸润组Rb中MMP-2和EMMPRIN的表达(灰度值分别为103.89±13.39,105.23±14.00)明显高于无视神经浸润组(灰度值分别为118.39±15.11,117.53±16.13；P<0.01,P<0.05)。结论：MMP-2及EMMPRIN的表达水平可能与Rb的浸润转移有关。
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