We, the Publisher and Editor of Artificial Cells, Nanomedicine, and Biotechnology, are issuing an Expression of Concern for the following article:
Article title: Shikonin inhibits proliferation, migration, invasion and promotes apoptosis in NCI-N87 cells via inhibition of PI3K/AKT signal pathway
Authors: Liushun Jia, Zhen Zhu, Hongbo Li and Yaofeng Li
Journal: Artificial Cells, Nanomedicine, and Biotechnology
Bibliometrics: Volume 47, Number 01, pages 2662–2669
DOI: https://doi.org/10.1080/21691401.2019.1632870
After publication of this article, questions about the scientific integrity of the article content were brought to the Publisher and Editor’s attention. We have reached out to the authors requesting that they supply information that would confirm the article’s integrity, but the authors have not responded to our queries within the requested timeframe. Therefore, as we continue to work through the issues raised, we advise readers to interpret the information presented in the article with due caution.