Metadichol Induces Four Ubiquitin and Chromatin Genes- USP7, UBE3A, BCOR and PPIL4 at One Picogram per Milliliter

Ubiquitin-pathway enzymes and chromatin-associated co-regulators set the half-life, activity and processing of a large fraction of the regulatory proteome, yet few small molecules are known to alter their transcription in primary human cells. Here the response of four such genes to Metadichol, a nanoemulsion of long-chain policosanol alcohols, was measured in human peripheral blood mononuclear cells by quantitative real-time PCR across five concentrations spanning six orders of magnitude. All four genes responded. At 1 pg/mL every gene was significantly induced, with PPIL4 reaching 7.39-fold, UBE3A 6.57-fold, USP7 5.65-fold and BCOR 4.93-fold. The concentration–response was strongly non-monotonic: induction peaked at 1 pg/mL and declined at nanogram concentrations, where the BCOR and PPIL4 responses were no longer significant. At the lowest concentration tested, 0.1 pg/mL, the genes separated into two opposing groups, with BCOR and PPIL4 up-regulated while UBE3A and USP7 were suppressed to 0.42- and 0.62-fold. Pairwise correlation across the dose series resolved the same two groupings quantitatively: UBE3A with USP7 and BCOR with PPIL4. USP7 was the only gene significantly changed at every concentration tested. Because USP7 and UBE3A encode a deubiquitinase and an E3 ligase whose reported substrates include sirtuins, MYC, steroid receptors, clock proteins and NF-κB subunits, a transcript-level change in these two genes offers a route by which a single upstream event could propagate across many downstream proteins. The findings are transcript-level and do not establish changes in protein abundance or enzymatic activity, which remain to be tested.