NIPAL1 (NIPA-like domain containing 1) functions primarily as a magnesium transporter, with the ability to transport other divalent cations including Fe(2+), Sr(2+), Ba(2+), Mn(2+), Cu(2+) and Co(2+), though with much lower efficiency than Mg(2+) 1. The protein localizes to the Golgi apparatus and shows magnesium-dependent expression patterns 1. In pancreatic β-cells, NIPAL1 plays a conditional role in insulin secretion, where knockdown decreases both basal insulin secretion and total insulin content, while overexpression increases insulin content 1. NIPAL1 has emerged as a disease-relevant gene across multiple conditions. It serves as a tumor-promoting factor in oral squamous cell carcinoma, where expression correlates with cancer cell invasion and poorer disease-free survival 2. The gene is associated with gout susceptibility, particularly the renal underexcretion subtype, though functional analysis suggests an indirect role in urate handling 3. NIPAL1 variants are linked to invasive urothelial carcinoma in dogs, accounting for nearly 30% of disease risk in Shetland sheepdogs 4, and show associations with nasopharyngeal carcinoma, bone mineral density, and spondylosis in humans 567. These findings suggest NIPAL1's magnesium transport function may influence diverse pathological processes through altered cellular magnesium homeostasis.