Abstract
Background
Targeted regulation of drug-resistant gene expression through lncRNA has emerged as a novel research direction for overcoming immune resistance in osteosarcoma. However, the specific effects and regulatory mechanisms of lncRNA-TIL1H on immune resistance in osteosarcoma remain unclear.
Objective
To explore the mechanism by which lncRNA-TIL1H targets the regulation of the drug-resistant genes MDR1 and RAD21.
Methods
Clinical samples including osteosarcoma tissues and adjacent tissues were collected for qPCR and WB analysis of lncRNA-TIL1H expression as well as MDR1 and RAD21. Acquisition of drug-resistant osteosarcoma cells by cisplatin treatment MG-63/R. The cells were divided into four groups: MG-63, MG-63/R, si-NC-MG-63/R, and si-TIL1H-MG-63/R group. Cell proliferation and colony formation, and migration and invasion were detected by CCK-8, Transwell and scratch assays. In addition, the effects on osteosarcoma after interfering with lncRNA-TIL1H were further explored by the animal experiments, including HE staining and immunohistochemistry.
Results
The expression of lncRNA-TIL1H and the drug-resistant genes MDR1 and RAD21 significantly increased in osteosarcoma. si-TIL1H effectively inhibited cell proliferation, invasion, migration and decreased the expression of drug-resistant genes in MG-63/R. Finally, the animal experiments revealed that si-lncRNA-TIL1H inhibited tumor proliferation.
Conclusion
The expression of lncRNA-TIL1H in MG-63/R promotes the upregulation of drug-resistant genes MDR1 and RAD21, leading to the occurrence of immune resistance and accelerating osteosarcoma progression.
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