目的:探讨肾癌索拉非尼耐药相关长链非编码RNA(lncRNA-SRLR)对骨肉瘤U2OS细胞侵袭和转移的机制。方法:应用慢病毒空载对照(LV-NC)和慢病毒lncRNA-SRLR过表达载体(LV-over/SRLR)转染U2OS细胞，并建立细胞稳转株U2OS/NC和U2OS/SRLR。应用实时荧光定量PCR(qRT-PCR)法检测lncRNA-SRLR和赖氨酸羟化酶(PLOD2)mRNA的相对表达量。采用transwell和划痕实验检测细胞迁移和侵袭能力。采用酶联免疫吸附法(ELISA)法检测白细胞介素6(IL-6)的表达情况。采用荧光原位杂交技术(FISH)检测lncRNA-SRLR细胞定位。采用免疫荧光法检测PLOD2蛋白的表达情况。采用Western blot法检测PLOD2和FAK/STAT3通路相关蛋白的表达情况。结果:qRT-PCR检测结果显示，U2OS/NC和U2OS/SRLR细胞中lncRNA-SRLR mRNA的相对表达量分别为1.00±0.01和3 964.97±0.05，差异有统计学意义(n P<0.001)。PLOD2 mRNA在U2OS/SRLR细胞中的表达量为2.77±0.11，明显高于对照U2OS/NC细胞(1.00±0.04，n P<0.01)。划痕实验和侵袭实验均显示，U2OS/SRLR细胞的迁移和侵袭能力明显高于U20S/NC细胞(n P0.05)。免疫荧光检测结果显示，U2OS/SRLR细胞中PLOD2蛋白的表达明显高于U2OS/NC细胞。Western blot法检测结果显示，U2OS/SRLR细胞中PLOD2、p-FAK和p-STAT3等蛋白的相对表达量明显高于U2OS/NC细胞，差异有统计学意义(n P<0.01)。n 结论:lncRNA-SRLR可能通过作用于PLOD2，激活FAK/STAT3通路诱导了骨肉瘤U2OS细胞的侵袭和转移。“,”Objective:To explore the potential mechanism of sorafenib resistance associated long non-coding RNA (lncRNA-SRLR) promoted invasion and metastasis in U2OS osteosarcoma cells.Methods:We transfected U2OS cells with negative control lentivirus (LV-NC) or lncRNA-SRLR overexpressed lentivirus (LV-over/SRLR) particles. LV-NC and LV-over/SRLR stable transfected cells (U20S/NC and U20S/SRLR) were selected by primary cell culture medium containing puromycin. The mRNA expressions of lncRNA-SRLR and procollagen-lysine, procollagen-lysine 2-oxoglutarate 5-dioxygenase 2 (PLOD2) were detected by quantitative real-time polymerase chain reaction (qRT-PCR). The effect of lncRNA-SRLR on the invasion of U2OS cells were determined by wound-healing assay and Transwell migration assay. The effect of SRLR on the interleukin-6 (IL-6) secretion of U2OS cells was evaluated by enzyme-linked immunosorbent assay (ELISA) analysis. The subcellular distribution of SRLR in U2OS cells was detected by fluorescence in situ hybridization (FISH) analysis.The expression of PLOD2 in cells was detected by immunofluorescence (IF). The expressions of PLOD2 and focal adhesion kinase (FAK)/signal transducer and activator of transcription 3 (STAT3) signal pathway related proteins in U2OS/NC and U2OS/SRLR cells were detected by western blotting.Results:qRT-PCR assay showed that mRNA expressions of lncRNA-SRLR and PLOD2 in U2OS/SRLR cells were (3 964.97±0.05) and (2.77±0.11), respectively, significantly higher than those in U2OS/NC cells (n P<0.001 orn P<0.01). The results of wound-healing and Transwell migration assay showed that over-expression of SRLR markedly promoted the invasion ability of U2OS cells (n P0.05). The subcellular distribution assay revealed that lncRNA-SRLR is predominately located in the nucleus. The result of IF showed that compared with U2OS/NC cells, the expression of PLOD2 was up-regulated in U2OS/SRLR cells. The result of western blotting showed that over-expression of SRLR significantly increased the expression levels of PLOD2, phosphorylation (p)-FAK and p-STAT3 in U2OS cells (n P<0.01).n Conclusion:lncRNA-SRLR promotes invasion and metastasis of osteosarcoma by activating PLOD2-FAK/STAT3 signal axis.