Retraction Note: Chrysophanol suppresses growth and metastasis of T cell acute lymphoblastic leukemia via miR-9/PD-L1 axis.

The Editor in Chief retracted this article (Yin et al., 2020) because of significant concerns regarding a number of Figures presented in this work, which question the integrity of the data. After publication, overlap was detected with figures in articles submitted and published within a close time frame.Figure 1C appears to contain similarities to Fig. 2G in an unrelated article by other authors (Sun et al., 2020)Figure 4K image labeled as TALL-104 cells appears to be similar to that published previously in unrelated articles with different labels: Fig. 2E (Zhang et al., 2020) labeled as A549 cells; and Fig. 3E[4, now retracted] labeled as HT29 cellsFigure 6K appears to contain images that have been published previously (Zhang et al., 2020) and also labeled as a different cell typeThe authors were unable to provide raw data and stated that the figures were obtained through a commercial lab hired to perform some of the experiments for this study.All authors agree to this retraction.