NFIB is a transcription factor with critical roles in neuronal development and cell fate specification. As a DNA-binding transcription factor, NFIB recognizes palindromic sequences in promoter regions and directly regulates gene transcription 1. In the developing retina, NFIB is selectively expressed in late progenitor cells where it controls bipolar interneuron and Müller glia specification while promoting proliferative quiescence 1. NFIB is also essential for astrocyte differentiation from pluripotent stem cells, as its overexpression with SOX9 rapidly generates functional astrocytes resembling adult cells 2. Beyond development, NFIB functions as an oncogenic transcription factor in several cancers. In adenoid cystic carcinomas, NFIB participates in the pathogenic MYB-NFIB fusion translocation 3. In small cell lung cancer, NFIB is a direct target of ASCL1 and contributes to malignant behavior 4. In castration-resistant prostate cancer, NFIB upregulation drives epithelial-to-mesenchymal transition and metastasis by directly regulating EMT factors CDH1 and VIM 5. These findings establish NFIB as a multifunctional regulator spanning developmental processes and pathological conditions.