TLR2基因稳定沉默膀胱癌细胞株T739-TLR2Δ建立及生物学特征鉴定

目的 通过载体表达的RNA干扰技术(RNAi)阻断小鼠膀胱癌T739细胞TLR2基因的表达,建立TLR2基因稳定沉默的细胞株.方法 构建3种pcDNATM6.2-GW/EmGFPmiR-TLR2重组质粒,脂质体法转染T739细胞,用RT-PCR法筛选干扰效果最强的重组质粒.再将该重组质粒转染T739细胞,用杀稻瘟菌素筛选抗性细胞克隆,即获得TLR2受体及其mRNA稳定表达最低的稳转细胞株,并鉴定其生物学特征.结果 测序结果显示设计合成的DNA片段已正确插入载体,将沉默效果最强的重组质粒pcDNATM6.2-GW/EmGFPmiR-TLR2转染T739细胞,筛选出有效沉默T739细胞TLR2基因表达的细胞株T739-TLR2△.TLR2 mRNA和受体表达分别下降95%和90%以上;T739-TLR2△细胞增殖指数降低、群体倍增时间延长,未发现明显凋亡细胞.结论 构建pcDNATM6.2-GW/EmGFPmiR-TLR2重组质粒能稳定抑制T739细胞TLR2表达,可用于研究TLR2基因在T739细胞的功能与作用.

Establishment of a bladder cancer cell line with toll-like receptor 2 gene knockdown and identification of its biological characteristics

Objective To establish a murine bladder cancer cell line with stable silencing of toll-like receptor 2 (TLR2) expression. Methods Three different recombinant plasmids pcDNATM 6.2-GW/EmGFPmiR-TLR2 were constructed and transfected into T739 cells via lipofectamine. The recombinant plasmid with the strongest interference effect was selected by RT-PCR and transfected into T739 cells. The Blasticidin-resistant cell clones were screened to obtain bladder cancer cell lines with TLR2 gene knockdown, and the biologi...