ABSTRACT
Objective To explore the expressions of growth factor receptor binding protein 2 -associated bin-ding protein -1 (Gab -1 )and glioma -associated oncogene homologue -1 (Gli -1 )in pediatric medulloblastoma,and to analyze their correlation between clinical and pathological characteristics and prognosis in pediatric medulloblastoma. Methods Elivision immunohistochemistry was used to detect the expressions of Gab -1 and Gli -1 protein in tissue microarray of 40 paraffin embedded pediatric medulloblastoma specimens.Chi -square test or Fisher exact test was used to analyze the correlation between Gab -1 and Gli -1 protein expressions with gender,age,tumor location and pathological subtypes.Follow -up data were handled by using Kaplan -Meier survival analysis and Cox regression anal-ysis.Results Positive expression ratios of Gab -1 and Gli -1 protein in 40 pediatric medulloblastoma were 35.0%and 55.0%,respectively.The positive expression rate of Gab -1 in medulloblastoma tissues had no statistical signifi-cance between different genders[male:30.4%(7 /23 cases)vs.female:41 .2%(7 /17 cases)],age[0.05).There were statistical differences of positive expression rate of Gli -1 protein in different age groups[0.05).Kaplan -Meier survival analysis showed that the age,the expressions of Gab -1 and Gli -1 protein were correlated with prognosis of pediatric medulloblastoma(all P <0.05).Cox regression indicated that the age,pathological subtypes and the expression of Gli -1 protein were independent prognostic indicators in pediatric medulloblastoma(all P <0.05).Conclusion Expression of Gab -1 and Gli -1 protein is significantly correlated with the prognosis of medulloblastoma,and the positive expression is a marker of unfavorable prognosis.