Fig. 2: MSC-EV target injured neurons and inhibit apoptosis after SAH.

a, b Representative fluorescence images of brain sections stained with neuronal (NeuN) marker 48 h after SAH. PKH67-dyed EVs were administered by i.v. into SAH-affected rats (n = 3). c, d TUNEL staining of the cerebral cortex and hippocampus, respectively.