Genetic evidence that SOST inhibits WNT signaling in the limb.
Genetic evidence that SOST inhibits WNT signaling in the limb.
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DOI:
10.1016/j.ydbio.2010.03.021
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发表时间:
2010-06-15
影响因子:
2.7
通讯作者:
Loots, Gabriela G.
中科院分区:
文献类型:
--
作者:
Collette, Nicole M.;Genetos, Damian C.;Murugesh, Deepa;Harland, Richard M.;Loots, Gabriela G.
SOST is a negative regulator of bone formation and mutations in human SOST are responsible for sclerosteosis. In addition to high bone mass, sclerosteosis patients occasionally display hand defects, suggesting that SOST may function embryonically. Here we report that overexpression of SOST leads to loss of posterior structures of the zeugopod and autopod by perturbing anterior-posterior and proximal-distal signaling centers in the developing limb. Mutant mice that overexpress SOST in combination with Grem1 and Lrp6 mutations display more severe limb defects than single mutants alone, while Sost-/- significantly rescues the Lrp6-/- skeletal phenotype, signifying that SOST gain-of-function impairs limb patterning by inhibition of WNT signaling through LRP5/6.
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