GFAP and ischemia: Interestingly, TUNEL‐positive cells were only detected in neurons following cerebral I/R injury, while neither GFAP‐positive astrocytes nor Iba‐1‐positive microglia showed any TUNEL immunoreactivity, indicating that neurons are the most sensitive cell type in the ischemic brain and RIPC reduces ischemia‐induced neuronal apoptosis.