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Circular RNA circPTK2 modulates migration and invasion via miR-136/NFIB signaling on triple-negative breast cancer cells in vitro

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Abstract

Objective and background

Triple-negative breast cancer (TNBC) is an aggressive breast type of cancer with poor prognosis and high mortality rates. CircRNAs have been widely investigated, due to their crucial role in cancer progression. We aimed to elucidate the function of circPTK2 (has_circ_0003221) in TNBC and explore the mechanism in progression of TNBC.

Methods

qPCR was performed to validate the expression of circPTK2 and related mRNA in TNBC tissue and cell lines. CCK-8, EdU, Transwell assay were conducted to detect the proliferation, migration and invasion of circPTK2 and miR-136 on TNBC cells. RIP and dual-luciferase reporter assay were used to confirm the interaction among circPTK2, miR-136 and NFIB. Si-circPTK2, mimic and inhibitor of miR-136 were transfected in TNBC cells to confirm the mechanism of circPTK2 and miR-136 in TNBC cells.

Results

CircPTK2 were downregulated in TNBC tissues and cell lines. CircPTK2 significantly promoted the proliferation, migration, and invasion of TNBC cells. CircPTK2 was confirmed to be a sponge of miR-136, and directly regulated NFBI and AKT/PI3K pathway. A rescue assay validated circPTK2/miR-136/NFIB axis in TNBC cells.

Conclusion

CircPTK2 promoted TNBC progression and development. circPTK2/miR-136/NFIB might be an effective biomarker for TNBC.

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Authors and Affiliations

  1. Department of General Surgery, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China

    Meng Wang, Di Chen, Hanchao Zhang & Chengyu Luo

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  1. Meng Wang
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  2. Di Chen
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  3. Hanchao Zhang
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Correspondence to Chengyu Luo.

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Wang, M., Chen, D., Zhang, H. et al. Circular RNA circPTK2 modulates migration and invasion via miR-136/NFIB signaling on triple-negative breast cancer cells in vitro. Inflamm. Res. 71, 409–421 (2022). https://doi.org/10.1007/s00011-022-01548-4

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  • DOI: https://doi.org/10.1007/s00011-022-01548-4

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