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Shikonin suppresses the proliferation and colony formation of gastric cancer cells by regulating miR96/SOCS4 pathway
Abstract
Purpose: To investigate whether shikonin is able to inhibit cell proliferation and colony formation in gastric cancer (GC) cells and to elucidate the molecular mechanism.
Methods: Gastric cancer (GC) cell line SGC-7901 was used. The effects of shikonin on SGC-7901 cells were evaluated using Cell Counting Kit-8 (CCK-8) and soft-agar colony formation assays, respectively. Quantitative reverse transcription-polymerase chain reaction (qRT-PCR) was employed to measure miR-96 expression levels. The regulatory effect of miR-96 on SOCS4 was determined by luciferase activity assay, while the effect of shikonin and miR-96 overexpression on proliferating cell nuclear antigen (PCNA), cyclin D1, suppressor of cytokine signaling 4 (SOCS4), and JAK/STAT pathwayrelated protein expression levels were analyzed by western blots.
Results: The results show that shikonin dose-dependently suppressed the proliferation and colony formation of SGC-7901 cells. Western blot analysis revealed that PCNA and cyclin D1 were downregulated by shikonin treatment. Luciferase activity assay demonstrated that miR-96 is directly bound to SOCS4. Further results showed that miR-96 mimics reversed the effects of shikonin on SOCS4 and JAK/STAT pathway-related protein expression levels.
Conclusion: Shikonin suppresses proliferation and colony formation by regulating miR-96/SOCS4 pathway in SGC-7901 cells, providing a potential therapeutic target for GC.