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. 2022 Jun 27;29(11):1731–1741. doi: 10.1038/s41417-022-00492-z

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — A The secondary mass spectrum result of S100A9 peptide. B, C Silver-staining assay after RNA pulldown showed that S100A9 binds to circ_0006156. D RIP assay showed that circ_0006156 binds to S100A9 in DU145 cells. E, F qRT–PCR and Western blot analyses showed that S100A9 protein, but not mRNA, was influenced after circ_0006156 knockdown or overexpression. G Western blot analysis of S100A9 expression after treatment with cycloheximide at the indicated time points in different groups. H S100A9 expression was increased after treatment with MG132. I Western blot analysis after co-IP showed that the ubiquitination level of S100A9 was decreased after overexpressing circ_0006156.