To clarify whether MYCL as well as MYC, MYCN and ASCL1 were transcriptionally suppressed by JQ1 in SCLC cells, we further performed mRNA microarray analysis in 12 of the 14 SCLC cell lines, which were collected after 24 hours of culture with and without 1.0 μM of JQ1. This evidence concerns the gene MYCN and small cell lung carcinoma.