Regarding purine metabolism, ENTPD2, NME3, PNP, and PRUNE RNAs are deregulated in the frontal cortex in AD (91), whereas ADA, AK1, ENTPD1, NME1, NME3, NME4, NME6, PNP, and PRUNE are upregulated in rpDLB with changes less marked in DLB. The gene discussed is ENTPD2; the disease is Alzheimer disease.