Retraction Note: Bone mesenchymal stem cell-derivedexosomal microRNA-29b-3p preventshypoxic-ischemic injury in rat brain byactivating the PTEN-mediated Aktsignaling pathway.

An amendment to this paper has been published and can be accessed via the original article.

Retraction to: J Neuroinflammation 17, 46 (2020)

https://doi.org/10.1186/s12974-020-1725-8

The authors have retracted this article [1] because they have been unable to replicate the results of their study. After publication they expanded the sample size and repeated the measurements, and found that miR-29b-3p was not always down-regulated in the rat MCAO model and OGD cell model. In addition, when the processing time was doubled, miR-29b-3p showed an upward trend. The conclusions presented are therefore not reliable. All authors agree with this retraction.