ABSTRACT
Objective To investigate the effects of LncRNA MT1JP on the migration and invasion of uveal melanoma cell,and explore its regulatory mechanism.Methods The expression level of LncRNA MT1JP in uveal melanoma cell line and normal retinal pigment epithelium cell line were measured by qRT-PCR.The SP6.5 cell line was divided into three groups,MT1JP group transfect with pcDNA3.1-MT1JP,siMT1JP group transfect with pcDNA3.1-siMT1JP and NC group transfect with negative pcDNA3.1 plasmid.The migration and invasion ability were measured by cell wound scratch assay and transwell assay.Western blot was used to measure the expression level of P53 protein.Results The expression level of LncRNA MT1JP in SP6.5 and M23 cell line was 0.20 ± 0.02 and 0.31 ± 0.01,respectively,which was significantly lower than 1.0 in ARPE-19 cell line (all P ＜0.01).The wound healing rate in siMT1JP group was 61.50 ± 3.70％.while,NC group was 20.0％ ± 2.10％,and MT1JP group was 10.6％ ± 1.7％,there was no statistical difference among three groups (all P ＜ 0.01).The invasion cell number was 75.6 ±6.8 in siMT1JP group,which was significantly more than 29.5 ± 3.9 in NC group,and 10.3 ±2.6 in MT1JP group,there was no statistical difference among three groups (all P ＜ 0.01).The expression level of P53 protein in siMT1JP group was 0.41 ± 0.04,which was significantly lower than 1.0 in NC group (P ＜ 0.01).However,the expression level of P53 protein in MT1JP group was 5.73 ±0.62,which was significantiy higher than 1.0 in NC group (P ＜ 0.01).Conclusion LncRNA MT1JP inhibits the migration and invasion of uveal melanoma cell,which may be associated with upregulation of P53 expression.