Retraction.

Retraction: "MicroRNA-4429 restrains colorectal cancer cell invasion and migration via regulating SMAD3-induced epithelial-mesenchymal transition," by Hongwen Li, Weijie Liang, Hongyu Zhang, Yifang Shui, and Zhe Zhang, J Cell Physiol. 2021; 5875-5884. The above article, published online on 3 March 2021 in Wiley Online Library (https://onlinelibrary.wiley.com/doi/10.1002/jcp.30271) has been retracted by agreement between the authors, the journal's Editor in Chief, Prof. Dr. Gregg Fields, and Wiley Periodicals LLC. The retraction has been agreed after the authors stated that unintentional errors occurred during the research process, and the experimental results cannot be verified. Thus, the conclusions are considered to be invalid.