WNT1-induced secreted protein-1 (WISP1) is expressed at high levels in osteoblasts and their precursors. WIPS1 plays an important role in various aspects of bone formation. Scientists at the NIH generated Wisp1-deficient (Wisp1-/-) mice. Deletion of Wisp1 resulted in a decrease in bone mineral density, total bone volume, bone thickness, and biomechanical strength. Wisp1 knockout mouse model can be used to study the molecular mechanisms of bone turnover and patho/physiology of tissues that express WISP1. The animal is only available from MMRRC.