SLC2A1 and Alzheimer disease: Quantitative immunoblotting and immunofluorescence imaging characterized disease-specific alterations.<h4>Results</h4>In AD, both endothelial (GLUT1<sub>55 kDa</sub>) and astrocytic (GLUT1<sub>45 kDa</sub>) isoforms were significantly reduced, along with MCT1, indicating widespread impairment of glucose and lactate transport.