CHST家族在临床无功能腺瘤组织中的表达及意义

Expression and meaning of CHSTs family in clinical non-functioning adenomas

目的探讨临床无功能腺瘤中碳水化合物硫转移酶(CHST)家族基因的RNA表达水平及其临床意义。方法收集90例临床无功能腺瘤的组织样本,反转录实时荧光定量聚合酶链反应(RT-qPCR)检测样本中的CHST1、CHST2、CHST7、CHST8、促卵泡激素亚单位β(FSHb)、POU结构域转录因子1(POU1F1)和类固醇生成因子1(SF-1)mRNA的表达水平;分析CHST家族mRNA水平和患者临床病理特征的关系;受试者工作特征(ROC)筛选具有诊断无功能腺瘤谱系分化的CHST分子。结果体积大的肿瘤CHST1基因和CHST7基因表达水平高于体积小的肿瘤(P=0.014,P=0.044),女性患者CHST2基因表达水平高于男性患者(P=0.016),侵袭性肿瘤的CHST8基因表达水平低于非侵袭肿瘤(P=0.044)。按照SF-1染色强弱分组,各组CHST1、CHST2、CHST7、CHST8基因表达水平的差异有统计学意义(P<0.05);按照PIT1染色强弱分组,各组CHST1、CHST7基因表达水平的差异有统计学意义(P<0.01)。相关性分析显示,CHST1水平与肿瘤体积和POU1F1水平呈正相关(r=0.322,P=0.002;r=0.686,P<0.001),与NR5A1水平呈负相关(r=-0.227,P=0.032);CHST7水平与POU1F1水平呈正相关(r=0.774,P<0.001);CHST8与FSHb、NR5A1水平呈正相关(r=0.485,P<0.001;r=0.725,P<0.001)。诊断未成熟POU1F1谱系,CHST1的ROC曲线下面积(AUC)为0.750(P=0.023);诊断SF-1谱系,CHST8的AUC为0.776(P=0.008),CHST1联合CHST8的AUC为0.823(P=0.002)。结论CHST家族参与临床无功能腺瘤的增殖和分化,CHST1联合CHST8具有诊断SF-1谱系分化的价值。

Objective To observe the RNA expression level of carbohydrate thiotransferase family(CHSTs)in non-functioning adenoma,and to analyze its clinical significance.Methods Ninety tissue samples of clinical non-functioning adenoma were collected.The mRNA expression levels of CHST1/2/7/8,folliclestimulating hormone subunitβ(FSHb),POU domain transcription factor 1(POU1F1)and steroid-producing factor 1(SF-1)were detected by real time fluorescence quantitative PCR(RT-qPCR).And receiver operating characteristic(ROC)curve was used to screen the CHST molecule possessing the function for diagnosing CHST molecule differentiated by non-functional adenoma lineage.Results The expression amounts of CHST1 gene and CHST7 gene in the tumors with large volume were higher than those with small tumors(P=0.014,P=0.044),and the CHST2 gene level in female patients was higher than that in male patients(P=0.016),and the CHST8 gene level in invasive tumors were lower than in non-invasive tumors(P=0.044).The grouping was conducted according to the intensity of SF-1 staining,there were statistically significant differences in CHST1/2/7/8 gene levels among all groups(P<0.05);the grouping was performed according to the intensity of PIT1 staining,there were statistically significant differences in CHST1/7 gene levels among all groups(P<0.01).The correlation analysis showed that the CHST1 level was positively correlated with the tumor volume and POU1F1 level(r=0.322,P=0.002;r=0.686,P<0.001)and negatively corre-lated with the NR5A1 level(r=-0.227,P=0.032).The CHST7 level was positively correlated with the POU1F1 level(r=0.774,P<0.001);the CHST8 level was positively correlated with the FSHb and NR5A1 levels(r=0.485,P<0.001;r=0.725,P<0.001).The area under ROC curve(AUC)of CHST1 for diagno-sing the immature POU1F1 lineage was 0[Key words]clinical non-functioning adenoma;carbohydrat.750(P=0.023).AUC of CHST8 for diagnosing SF-1 lineage was 0.776(P=0.008),and the AUC of CHST1 combined with CHST8 was 0.823(P=0.002).Conclusion The CHST family is involved in the proliferation and differentiation of clinical nonfunctional adenomas.CHST1 combined with CHST8 is valuable in the diagnosis of SF-1 lineage differentiation.