Scientists Discover Molecular 'Switch' in Brown Fat with Potential to Treat Bone Disease
Researchers at McGill University have identified a molecular 'switch' in mice that activates an energy-burning system in brown fat, which could lead to new treatments for bone disease. This discovery, published in Nature, reveals a second heat-generating pathway in brown fat, previously unknown, that operates alongside the classic system. The team, led by Lawrence Kazak, found that glycerol attaches to an enzyme called TNAP, activating this alternative pathway. This finding is significant as TNAP plays a crucial role in bone health, particularly in calcification, which strengthens bone tissue. Mutations in TNAP can lead to hypophosphatasia, a disorder causing soft bones, fractures, and skeletal deformities. The research builds on previous work that led to enzyme replacement therapy for hypophosphatasia patients. 
