SRSF3 and oral cavity squamous cell carcinoma: In oral squamous cell carcinoma cells, polypyrimidine tract binding protein (PTBP) 1 and PTBP2 were shown to bind to exonic splicing suppressors of SRSF3 exon 4 to prevent its inclusion, leading to the upregulation of full-length SRSF3 (SRSF3-FL).