LGR5在子宫内膜癌中的表达及其意义

目的:探讨富含亮氨酸重复序列G蛋白偶联受体5(LGR5)在子宫内膜癌中的表达情况及其与临床病理因素的关系。方法:采用免疫组织化学SABC法检测90例子宫内膜癌及30例正常子宫内膜组织中LGR5表达情况,并分析其与临床病理因素的关系。结果:LGR5在子宫内膜癌组织中的阳性表达率(63.3%)显著高于正常子宫内膜(23.3%)(P0.001)。LGR5在1/2肌层浸润组的阳性表达率(72.5%)显著高于≥1/2肌层浸润组(33.3%)(P=0.001)。LGR5的阳性表达率在年龄、病理类型、组织学分级、宫颈累及、淋巴结转移、FIGO分期组间差异均无统计学意义(P0.05)。多因素分析发现LGR5是子宫内膜癌有无肌层浸润的独立影响因素(OR=0.163,95%CI 0.034~0.772,P=0.022)。结论:LGR5在子宫内膜癌组织中表达上调,提示与肌层浸润深度相关,可能在子宫内膜癌的发生中起一定作用。

The Expression and Significance of LGR5 in Endometrial Cancer

Objective:To investigate the expression of Leucine-rich repeat-containing G protein-coupled receptor 5(LGR5) in endometrial cancer(EC) and their relationship with clinicopathological characteristics.Methods:Immunohistochemistry were performed to measure the LGR5 expression in EC(n =90) and normal endometrium tissue(n =30).The expression of LGR5 and its relationship with clinicopathological characteristics were analyzed.Results:The expression of LGR5 was significantly higher in EC than that in normal tissue (63.3％ vs 23.3％,P＜0.001).The expression of LGR5 in ＜ 1/2 myometrium infiltration group was higher than in ≥1/2 myometrium infiltration group(72.5％ vs 33.3％,P =0.001).There was no significant difference between the expression of LGR5 in different group of age,histological type,histological differentiation,cervical stroma invasion,lymph node metastasis,FIGO stage(P ＞ 0.05).Multivariate analysis showed that LGR5 was an independent influential factor of myometrium infiltration (OR =0.163,95％ CI 0.034 ～ 0.772,P =0.022).Conclusions:LGR5 is up-regulated in EC,and is correlated to myometrium infiltration.LGR5 may play an important role in EC tumorigenesis.