Anti-Osteoprotegerin/TNFRSF11B Antibody Picoband® Fluoro488 Conjugated

Tumor necrosis factor receptor superfamily member 11B (TNFRSF11B), also known as OPG, is a protein that in humans is encoded by the TNFRSF11B gene. OPG is a cytokine receptor, and a member of the tumor necrosis factor (TNF) receptor superfamily. By analysis of radiation hybrids, TNFRSF11B gene was mapped to chromosome 8q24. OPG is a decoy receptor for the receptor activator of nuclear factor kappa B ligand (RANKL) . By binding RANKL, OPG inhibits nuclear kappa B (NF-κB) which is a central and rapid acting transcription factor for immune-related genes, and a key regulator of inflammation, innate immunity, and cell survival and differentiation. OPG binding to RANKL on osteoblast/stromal cells, blocks the RANKL-RANK ligand interaction between osteoblast/stromal cells and ostepclast precursors.

Highly expressed in adult lung, heart, kidney, liver, spleen, thymus, prostate, ovary, small intestine, thyroid, lymph node, trachea, adrenal gland, testis, and bone marrow. Detected at very low levels in brain, placenta and skeletal muscle. Highly expressed in fetal kidney, liver and lung.

Angiogenesis, Cancer, Cardiovascular, Cell Biology, Cell Cycle, Cell Cycle Inhibitors, Cytoskeleton/ECM, Developmental Biology, Extracellular Matrix, Lineage Markers, Lineage Specification, Mesenchymal Stem Cells, Protein Phosphorylation, Receptor Tyrosine Kinases, Signal Transduction, Stem Cells, Structures, Tyrosine Kinases

Acts as decoy receptor for TNFSF11/RANKL and thereby neutralizes its function in osteoclastogenesis. Inhibits the activation of osteoclasts and promotes osteoclast apoptosis in vitro. Bone homeostasis seems to depend on the local ratio between TNFSF11 and TNFRSF11B. May also play a role in preventing arterial calcification. May act as decoy receptor for TNFSF10/TRAIL and protect against apoptosis. TNFSF10/TRAIL binding blocks the inhibition of osteoclastogenesis.

1. Krakauer T (2008) . Nuclear factor-kappa B: fine-tuning a central integrator of diverse biologic stimuli. Int. Rev. Immunol. 27 (5) : 286–92. 2. Khosla S (December 2001) . Minireview: the OPG/RANKL/RANK system. Endocrinology 142 (12) : 5050–5. 3. Schoppet M, Preissner KT, Hofbauer LC (April 2002) . RANK ligand and osteoprotegerin: paracrine regulators of bone metabolism and vascular function. Arterioscler. Thromb. Vasc. Biol. 22 (4) : 549–53.