ABSTRACT
Objective:To detect the expression of long non-coding RNA (LncRNA) ARAP1-AS1 in pancreatic cancer, and to preliminarily explore its effects on the biological behaviors of proliferation, apoptosis, migration and invasion of pancreatic cancer cell.Methods:The pancreatic cancer tissue specimens and corresponding paracancerous tissue specimens of 25 patients were collected, and the expression of ARAP1-AS1 was detected by qPCR. Human pancreatic cancer cell line PANC-1 was cultured in vitro and divided into control group, siRNA-control group (transfected with siRNA control sequence), knockout group (transfected with ARAP1-AS1 siRNA), pcDNA3.1-control group (transfected with pcDNA3.1) and overexpression group (transfected with pcDNA3.1-ARAP1-AS1), qPCR method was used to detect the transfection efficiency, CCK-8 method was used to detect the cell proliferation ability, flow cytometry was used to detect the cell apoptosis, scratch test was used to detect the cell migration ability, Transwell method was used to detect the cell invasion ability, Western blot (WB) method was used to detect the expression of proliferating cell nuclear antigen (PCNA), B lymphoma-2 protein (Bcl-2), Bcl-2 related X protein (Bax), matrix metalloproteinase-9 (MMP-9) proteins.Results:The expression level of ARAP1-AS1 in pancreatic cancer tissues was significantly higher than that in adjacent tissues (2.26±0.13 vs 1.00±0.00) ( P<0.05). Compared with the siRNA-control group, the ARAP1-AS1 level (1.01±0.02 vs 0.29±0.03), PCNA, Bcl-2, MMP-9 protein levels, cell OD value (0.57±0.05 vs 0.23±0.03), scratch healing rate (78.53±7.02 vs 48.60±5.26), and number of invasions (229.63±22.59 vs 104.25±15.04) in PANC-1 cells of the knockout group were significantly reduced ( P<0.05), the Bax protein level and the apoptosis rate (4.52±0.42 vs 32.40±1.84) were significantly increased ( P<0.05). Compared with the pcDNA3.1-control group, the ARAP1-AS1 level (1.02±0.03 vs 2.06±0.08), PCNA, Bcl-2, MMP-9 protein levels, cell OD value (0.57±0.05 vs 0.90±0.08), scratch healing rate (77.65±6.67 vs 91.22±7.34), and number of invasions (225.34±19.65 vs 327.50±25.40) in PANC-1 cells of the overexpression group were significantly increased ( P<0.05), the Bax protein level and the apoptosis rate (4.58±0.48 vs 2.29±0.24) were significantly reduced ( P<0.05) . Conclusion:LncRNA ARAP1-AS1 is highly expressed in pancreatic cancer, which can promote the proliferation, migration and invasion of pancreatic cancer cells PANC-1, and reduce cell apoptosis.