Lnc-MALAT1, miR-125b, FOXQ1, PTGS2 and CDK5 in AD patients, PD patients and Ctrls. Comparisons of CSF lnc-MALAT1 (A), miR-125b (B), FOXQ1 (C), PTGS2 (D) and CDK5 (E) expressions among AD patients, PD patients and Ctrls. Comparisons of plasma lnc-MALAT1 (F), miR-125b (G), FOXQ1 (H), PTGS2 (I) and CDK5 (J) expressions among AD patients, PD patients and Ctrls. Comparisons among AD patients, PD patients and Ctrls were performed by Kruskal-Wallis H ran sum test. Multiple comparisons between groups were determined by Dunn’s test. P < 0.05 was considered significant. Lnc-MALAT1, long non-coding RNA metastasis-associated lung adenocarcinoma transcript 1; miR-125b, microRNA 125b; FOXQ1, forkhead box Q1; PTGS2, prostaglandin-endoperoxide synthase 2; CDK5, cyclin dependent kinase 5; AD, Alzheimer’s disease; PD, Parkinson’s disease; Ctrls, controls; CSF, cerebrospinal fluid.