The toxicity of lead on human neuroblastoma cells was alleviated by HUC-MSC-derived exosomes through miR-26a-5p/PTEN pathway.

Lead is a ubiquitous environmental chemical with various toxic damage to human body. This investigation aimed to explore the intervention effect of human umbilical cord mesenchymal stem cells derived exosomes (HUC-MSC-exo) on the neurotoxicity of lead and the relevant mechanism. Differential gradient ultracentrifugation was adopted to isolate HUC-MSC-exo.