Retraction Note: Downregulation of CDKL1 suppresses neuroblastoma cell proliferation, migration and invasion

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**Retraction Note: Cellular & Molecular Biology Letters (2019) 24:19 ** 10.1186/s11658-019-0139-z

The Editor-in-Chief has retracted this article because of concerns regarding the figures presented in this work. These concerns call into question the article's overall scientific soundness. An investigation conducted after its publication discovered the following issues:

• The second GAPDH band in Fig. 1B appears to overlap with the GADPH band in Fig. 2E in [1];
• The third CDKL1 band in Fig. 1B appears to overlap, when flipped and re-scaled, with the Ftl1, Duodenum band in Fig. 1A in [2];
• The micrograph shown in Panel GFP, siCDKL1 of Fig. 2B appears to overlap with the micrograph shown in Panel GFP, shZFR of Fig. 2a in [3];
• The GAPDH band in Fig. 2D appears to overlap, when flipped and re-scaled, with the GADPH, MG-63 band in Fig. 2C in [4];
• The assay shown in Panel 0h, NC in Fig. 4A appears to overlap with the assay shown in Panel 0h, pcDNA in Fig. 4A in [5].

The Editor-in-Chief therefore no longer has confidence in the integrity of the research presented in this article.

The authors have not replied to correspondence from the Publisher.