The above article, published online on 24 June 2015 in Wiley Online Library (https://onlinelibrary.wiley.com/doi/abs/10.1002/cbin.10506), has been retracted by agreement with the journal Editor, Sergio Schenkman, and John Wiley & Sons Ltd. The retraction has been agreed because the authors have not provided a signed Copyright Transfer Agreement. Reference Zhang, A., Lu, F., Yang, Y., Ren, X., Li, Z. and Zhang, W. (2015), MicroRNA-217 overexpression induces drug resistance and invasion of breast cancer cells by targeting PTEN signaling. Cell Biol Int. Accepted Author Manuscript. doi:10.1002/cbin.10506.