Figure 1: (a) Control mice ( ) and mice after CCAO ( ) were subjected to latex perfusion for visualization of the collateral vessel network. Red arrows indicate the ipsilateral ACA. (b) Quantification of the external vessel diameters (* versus control mice). (c) Gene expression analyses of the PDGF-βR, VEGFR2, PDGF- and VEGF-ligands, and receptor-targeting PTPs in the ACA ( ). PCA: posterior cerebral artery, PComA: posterior communicating artery, MCA: middle cerebral artery, and ACA: anterior cerebral artery.