The Noggin Null Mouse Phenotype Is Strain Dependent and Haploinsufficiency Leads to Skeletal Defects

    January 2006 in “ Developmental Dynamics ”
    Przemko Tylżanowski, Liese Mebis, Frank P. Luyten
    TLDR Noggin gene inactivation causes skeletal defects in mice, varying by genetic background.
    The study examined the effects of Noggin gene inactivation and haploinsufficiency in mice, revealing that phenotypes were strain-dependent. In Noggin null mice, skeletal development was disrupted, with altered bone mineralization and delayed ossification, particularly in hind limbs, and impaired muscle differentiation. The study found that Noggin haploinsufficiency led to skeletal defects, such as carpal and tarsal fusions in 100% of heterozygous mice across three genetic backgrounds, and kyphosis in 30% of CD1 mice. The research highlighted the importance of genetic background in Noggin-related phenotypes and suggested that genetic modifier screens could further elucidate Noggin's role in development. The study involved backcrossing mice for at least 14 generations and analyzing a minimum of six embryos per genotype from three or more litters.
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