Respiratory Research (2020) 21:161

https://doi.org/10.1186/s12931-020-01426-9

The Editors-in-Chief have retracted this article. Concerns with Fig. 6B were previously addressed with a correction [1] but more image irregularities have been identified, specifically:

Figure 2D: theShp(KO) + CS panel appears to partially overlap with the MK-2206 + CS MMP-9 panel of Fig. 2C in a previously published article [2].

Figure 5A: there appears to be a splice in the Pro-MMP-9 band.

Figure 7A: the JNK 1.25 and 2.5 blots appear to be identical to the JNK //- and +// blots in Fig. 7B.

The Editors-in-Chief therefore no longer have confidence in the results reported in this article.

Authors Ya-nan Liu Jian Shen, Jian-cang Zhou, Hui-juan Shen, Qiang Shu, Qiang-min Xie and Yicheng Xie agree with this retraction. The other authors have not responded to correspondence regarding this retraction.