骨肉瘤乳腺癌特异基因、Bcl-2及相关转录因子、雌激素受体mRNA的表达

mRNA expression of BCSG1,BTF,Bcl-2,ERα and ERβ in osteosarcoma and its significance

目的:探讨骨肉瘤乳腺癌特异基因1(breast carcinoma specific gene 1,BCSG1)、B细胞淋巴瘤/白血病-2(B cell lym-phoma/leukemia-2,Bcl-2)、Bcl-2相关转录因子(Bcl-2-associated transcription factor,BTF)和雌激素受体(estrogen receptor,ER)基因表达水平及意义。方法:用实时荧光定量RT-PCR技术检测16例低(未)分化骨肉瘤标本及成骨细胞系hFOB 1.19细胞株BCSG1、BTF、Bcl-2、ERα、ERβmRNA的表达,分析各指标间的相关性。结果:骨肉瘤组织中BCSG1、Bcl-2、ERα、ERβ的表达明显高于成骨细胞系hFOB 1.19细胞株(P<0.01),BTF表达两组无统计学差异;骨肉瘤组织ERα/ERβ显著高于成骨细胞系hFOB 1.19细胞株(P<0.01);肿瘤瘤体大小、患者性别对BCSG1、Bcl-2、BTF、ERα、ERβ的表达未见显著影响;骨肉瘤组织中BCSG1与ERα(r=0.696,P<0.01)、ERβ与Bcl-2(r=0.875,P<0.01)、ERα/ERβ与Bcl-2基因表达水平(r=-0.649,P<0.01)分别存在线性关系。结论:骨肉瘤组织中可能存在BCSG1增强ERα基因转录激活的作用,ERβ可能影响Bcl-2的表达。

Objective：To observe the mRNA expression of BCSG1 （breast carcinoma specific gene, BCSG1）, BTF（Bcl-2- associated transcription factor, BTF）, Bcl-2 （B cell lymphoma/leukemia-2, Bcl-2） and two subtypes of estrogen receptors in osteosarcoma and their implication. Methods： The expression of BCSG1, ERα, BTF, ERβ, and Bcl-2 mRNA were examined in 16 poorly differentiated osteosarcoma samples and a cell line hFOB 1. 19 by quantitative RT-PCR. The relationship between their expression was analyzed. Results： The mRNA expression of BCSG1, Bcl-2 and two subtypes of estrogen receptors in the osteosarcoma tissues was significantly higher than that in the osteoblast cell line of hFOB 1.19; the expression of BTF was not significantly different. ERα/ERβ in the osteosarcoma tissues was significantly higher than that in the hFOB 1.19 cells （P〈 0.01）. BCSG1, ERα, ERβ, Bcl-2 and BTF expression was not associated with the tumor size or patients gender. Correlation analysis showed there was a linear relationship between expression of BCSG1 and ERα, ERβ and Bcl-2, and ERα, ERβ ratio and Bcl-2. Conclusion： BCSG1 may enhance the activation of estrogen receptor α gene transcription, and ERβ may influence the expression of Bel-2 in osteosarcoma.