趋化因子受体CXCR4的表达与垂体腺瘤侵袭性关系的初步研究

Relationship between invasiveness and CXCR4 expression in human pituitary adenomas

目的探讨趋化因子受体CXCR4表达与腺瘤侵袭性的关系及其临床意义。方法收集西南医院近年经手术切除的临床资料完整的78例垂体腺瘤标本及5例正常垂体组织,均经10%的甲醛固定、石蜡包埋。联合运用Knosp影像学标准及任祖渊标准、参考术中情况,将肿瘤标本分为侵袭性与非侵袭组;运用免疫组化的方法检测这83例标本中CXCR4蛋白表达情况;分析CXCR4表达与垂体腺瘤侵袭性的内在关系。结果免疫组化实验结果显示CXCR4蛋白在正常垂体组织中及垂体腺瘤中均有表达,但在侵袭性垂体腺瘤组织中表达显著增高(P<0.01);在不同组织类型的垂体腺瘤中也均有表达,但无明显差别(P>0.05)。结论初步提示趋化因子受体CXCR4表达水平和垂体腺瘤侵袭性相关,与组织类型无关。CXCR4可作为评价肿瘤侵袭性的一项有效指标。

Objective To explore the relationship between chemokine receptor CXCR4 expression and invasiveness of pituitary adenomas. Methods A total of 78 pituitary adenoma specimens with comprehensive clinical data were surgically removed in Southwest hospital and 5 normal pituitary tissue samples were used as control. All the samples were fixed with 10 % formalin and then embedded with paraffin. Every case history was reviewed in detail. All the specimens were divided into invasive group （35 cases） and non-invasive group （43 cases） by the combined application of Knosp imaging diagnosis standard and Renzuyuan＇ s standard and referring to all operation records. The expressions of CXCR4 protein in 83 specimens were examined by immunohistochemistry. The relation between the expression of CXCR4 protein and invasiveness of the pituitary adenomas was analyzed. Results Immunohistochemistry showed that there was significantly high CXCR4 protein expression in invasive group and low in non-invasive group and normal pituitary tissue. There was a significant correlation between the expression level of CXCR4 protein and invasiveness of the pituitary adenomas （P 〈 0. 01 ） . There was no significant difference of the expression of CXCR4 protein among different histological types of pituitary adenomas （P 〉 0. 05）. Conclusion High CXCR4 protein expression is associated with the invasiveness of pituitary adenomas, suggesting that the expression of CXCR4 may have a value to assess the invasive pituitary adenomas.