Neurogranin (NRGN), a postsynaptic protein involved in memory consolidation, predicts cognitive deterioration in prodromal Alzheimer’s disease47, and fatty acid-binding protein, heart (FABP3), involved in fatty acid metabolism and lipid transport, is a biomarker candidate for AD, subarachnoid hemorrhage and TBI48–50, where the levels in serum can predict mortality48. This evidence concerns the gene NRGN and Alzheimer disease.