HSPA1A and Alzheimer disease: More specifically, increased levels of heat shock protein family A member 1A (HSPA1A), aminopeptidase Puromycin Sensitive (NPEPPS) and Prostaglandin F2 Receptor Inhibitor (PTGFRN) were found in the cerebrospinal fluid of AD patients and could represent useful markers to monitor the progression of the disease [158,159].