Lymphoblastoid cell lines (LCLs) from eight different RSTS patients (four carrying
CREBBP mutations and four carrying
EP300 mutations, listed in
Table S1) [20 (
link),51 (
link),52 (
link),53 (
link)] and seven healthy donors were obtained in collaboration with the Gaslini Genetic Bank service (Telethon Network of Genetic Biobanks); their use was approved by Ethics Committee of Università degli Studi di Milano (Comitato Etico number 99/20, 17 November 2020). Cells were maintained in
RPMI 1640 culture medium supplemented with
L-glutamine (Euroclone, Pero, Italy), 20%
fetal bovine serum (Euroclone, Pero, Italy), and
penicillin/streptomycin (Euroclone, Pero, Italy), and cultured in an incubator with 5% CO
2 at 37 °C.
LCLs were exposed to four different HDAC inhibitors: Trichostatin A (TSA) (sc-3511, Santa Cruz Biotechnology, Dallas, TX, USA),
Suberoylanilide hydroxamic acid (SAHA) (MK0683, Selleckchem, Houston, TX, USA),
Valproic acid (VPA) (P4543, Sigma Aldrich, St. Louis, MO, USA), and Sodium Butyrate (NaB) (B5887, Sigma-Aldrich, St. Louis, MO, USA). We tested three different concentrations for each HDACi (
Table S2) [54 (
link),55 (
link),56 (
link),57 (
link),58 (
link),59 (
link)] and selected the maximum dose and timing of exposure, ensuring acceptable LCLs survival (data not shown). Cells were incubated with vehicles (H
2O or DMSO) at the maximum time (24 h), TSA 2 µM for 2 h, SAHA 2 µM for 24 h, VPA 2 mM for 24 h, or NaB 5 mM for 24 h as suggested from the literature (
Table S2). Data were normalized on untreated cells and in vehicles for accounting for proliferation rate differences in basal condition between HD and RSTS lines.
Di Fede E., Ottaviano E., Grazioli P., Ceccarani C., Galeone A., Parodi C., Colombo E.A., Bassanini G., Fazio G., Severgnini M., Milani D., Verduci E., Vaccari T., Massa V., Borghi E, & Gervasini C. (2021). Insights into the Role of the Microbiota and of Short-Chain Fatty Acids in Rubinstein–Taybi Syndrome. International Journal of Molecular Sciences, 22(7), 3621.