PINT-87aa, an 87-amino acid (aa) peptide, is encoded by the circular form of the long intergenic non-protein-coding RNA爌53-induced transcript (LINC-PINT). PINT-87aa directly interacts with polymerase associated factor complex (PAF1c) and inhibits the transcriptional elongation of multiple oncogenes. PINT-87aa suppresses glioblastoma cell proliferation in vitro and in vivo