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TNFSF11, also known as Receptor Activator of Nuclear Factor-κB Ligand （RANKL）, is a crucial cytokine belonging to the tumor necrosis factor （TNF） superfamily. It is expressed on osteoblasts or T cells and binds to TNFRSF11B （OPG） and TNFRSF11A （RANK） on osteoclasts and precursor cells to regulate their differentiation and proliferation. RANKL plays a vital role in bone remodeling by stimulating osteoclast activity and is essential for maintaining bone homeostasis. In mice, the TNFSF11 gene is located on chromosome 14 and encodes a glycoprotein with an extracellular domain that can be cleaved and released into the bloodstream.
TNFSF11 is a key regulator of osteoclastogenesis and bone resorption. In bone organoid models, TNFSF11 signaling is essential for maintaining the balance between osteoblasts and osteoclasts. By manipulating TNFSF11 levels, researchers can study bone diseases such as osteoporosis and osteopetrosis in a more physiologically relevant context.
TNFSF11 is involved in the development and function of secondary lymphoid organs. In immune organoids, TNFSF11 signaling can influence the formation of lymphoid structures and the activation of immune cells. This makes it a valuable target for studying immune responses and developing new therapeutic strategies for autoimmune diseases.