NFIC is a sequence-specific DNA-binding transcription factor that recognizes palindromic promoter elements and regulates transcription by RNA polymerase II. It binds the canonical sequence 5'-TTGGCNNNNNGCCAA-3' in viral and cellular promoters and serves as a co-factor in nutrient-responsive gene regulation; for example, NFIC recruits the histone demethylase JMJD1A to adipogenic gene loci in response to glucose stimulation, enabling chr19 remodeling and transcriptional activation 1. NFIC has broad roles in developmental and homeostatic contexts. During tooth development, NFIC is essential for odontoblast differentiation and dentin formation; Nfic-knockout mice exhibit dentin dysplasia type I-like phenotypes with enlarged pulp chambers and short roots 2. In the pancreas, NFIC regulates ribosomal biology and endoplasmic reticulum stress responses; its loss impairs acinar differentiation and restrains PDAC initiation by preventing Kras-driven pre-neoplastic lesion formation 3. NFIC also promotes fibroblast activation in pulmonary hypertension; AXL-driven PI3K-AKT signaling facilitates NFIC nuclear translocation in cardiac fibroblasts, leading to fibrotic gene transcription and right ventricular remodeling 4. In cancer, NFIC shows context-dependent functions. In gastric cancer, NFIC is upregulated and promotes cell viability and invasion, making it a target of the suppressive microRNA miR-9-5p 5. In advanced non-small cell lung cancer, a PD-L1 promoter variant (rs822336) shows allele-specific binding of NFIC and C/EBPβ, modulating immunotherapy response to anti-PD-1/PD-L1 agents such as nivolumab 6. NFIC also interacts with FOXA1 and CREB5 to promote castration-resistant prostate cancer progression and resistance to androgen receptor-targeting therapies 7.