CTIF (cap-binding complex dependent translation initiation factor) is a specialized translation initiation factor that mediates cap-dependent translation during the pioneer round of mRNA translation. CTIF specifically functions with the nuclear cap-binding complex (CBC) component CBP80 to recruit the 40S ribosomal subunit via interactions with eIF3, enabling translation of newly exported mRNAs at the nuclear pore complex 1. Unlike steady-state translation mediated by cytoplasmic eIF4E, CTIF is uniquely required for CBC-dependent translation immediately following mRNA export 1. CTIF also plays a critical role in nonsense-mediated mRNA decay (NMD), functioning as part of the mRNA quality control surveillance pathway 2. In NMD, CTIF associates with the key factor UPF1 and participates in aggresome-targeting machinery for disposal of misfolded polypeptides generated from NMD substrates 2. Clinically, CTIF variants show disease relevance: a genome-wide association study identified rs2046243 in CTIF as significantly associated with earlier amyotrophic lateral sclerosis (ALS) onset by approximately 1.29 years, with functional evidence suggesting this variant increases CTIF expression in brain tissue 3. Additionally, SNPs in CTIF showed possible associations with hearing function in children, though results were not consistently replicated across cohorts 4.