Platelet-derived growth factor receptor β (PDGFRβ) is expressed in the brain mainly in brain capillary pericytes and levels of soluble PDGFRβ (sPDGFRβ) could be used as a biomarker of pericyte injury, as elevated sPDGFRβ levels in biofluids have been measured in patients with dementia [181]. Here, PDGFRB is linked to dementia.