NFIA is a transcriptional regulator that binds palindromic DNA sequences 1 to control tissue-specific gene programs with broad metabolic and developmental significance. Mechanistically, NFIA facilitates chr1 accessibility and transcription factor binding; it co-localizes with PPARγ at brown-fat-specific enhancers, where NFIA binding precedes and facilitates PPARγ recruitment 1. In adipocytes, NFIA upregulates mitochondrial oxidative phosphorylation genes and brown-fat-specific programs while simultaneously suppressing proinflammatory cytokine genes like Ccl2, thereby improving glucose homeostasis and limiting weight gain 2. Beyond adipose tissue, NFIA regulates fatty acid metabolism in articular chondrocytes; its inhibition suppresses expression of metabolic enzymes ACACA and CPT2, restoring cellular homeostasis and protecting against osteoarthritis progression, particularly under obesity conditions 3. During retinal development, NFIA controls bipolar interneuron and Müller glia specification while promoting proliferative quiescence 4. NFIA also functions in erythroid cells, where it cooperates with NFIX to silence fetal hemoglobin genes HBG1/2 through direct repression and BCL11A stimulation 5. Clinically, NFIA haploinsufficiency causes Chromosome 1 deletion syndrome, characterized by macrocephaly, craniofacial dysmorphisms, intellectual disability, and urinary tract defects 6.