RPPH1 and Alzheimer disease: In contrast to the lncRNAs discussed above, Rpph1 (ribonuclease P RNA component H1) seems to exert a neuroprotective compensation mechanism in AD pathology through three different ceRNA axes: Rpph1/miR-326/PKM2 [41], Rpph1/miR-122/Wnt1 [42] and Rpph1/miR-330-5p/CD42 [43].