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Mice carrying Collagen2a1-cre-mediated deletions of Lrp5 and/or Lrp6 were created and characterized.Mice lacking either gene alone were viable and fertile with normal knee morphology.Mice in which both Lrp5 and Lrp6 were conditionally ablated via Collagen2al-cre-mediated deletion displayed severe defects in skeletal development during embryogenesis.In addition,adult mice carrying Collagen2al-cre-mediated deletions of Lrp5 and/or Lrp6 displayed low bone mass suggesting that the Collagen2a1-cre transgene was active in cells that subsequently differentiated into osteoblasts.In both embryonic skeletal development and establishment of adult bone mass,Lrp5 and Lrp6 carry out redundant functions.
Mice carrying Collagen2a1-cre-mediated deletions of Lrp5 and / or Lrp6 were created and characterized. Mice lacking either gene alone were viable and fertile with normal knee morphology. Mice in both both Lrp5 and Lrp6 were conditionally ablated via Collagen2al-cre-mediated deletion displayed severe defects in skeletal development during embryogenesis. In addition, adult mice carrying Collagen2al-cre-mediated deletions of Lrp5 and / or Lrp6 displayed low bone mass suggesting that the Collagen2a1-cre transgene was active in cells that subsequently differentiated into osteoblasts. both embryonic skeletal development and establishment of adult bone mass, Lrp5 and Lrp6 carry out redundant functions.