AIF1 and Stroke: Double immunofluorescence staining for microglial proliferation and apoptosis as revealed by Iba‐1/Ki‐67 and Iba‐1/TUNEL was performed in the penumbra as well as in the ischemic core in vehicle‐ and A151‐treated mice after MCAO; A151 reduced microglial cell death and proliferation in the penumbra after stroke (Appendix Fig S6).