SRSF1 and cancer: Denichenko et al. designed decoy oligonucleotides for three splicing factors, RBFOX1/2, polypyrimidine tract binding protein 1 (PTBP1), and SRSF1 [92]; their expressions are altered in various cancer types and are known to be involved in cancer progression [4, 83, 85, 93, 94].