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JCS ePress
online publication date 15 Feb 2005
doi: 10.1242/jcs.01678
Research Article
Loss of
10
1 integrin expression leads to moderate dysfunction of growth plate chondrocytes
Therese Bengtsson,
Attila Aszodi,
Claudia Nicolae,
Ernst B. Hunziker,
Evy Lundgren-Åkerlund,
and
Reinhard Fässler*
* Author for correspondence (e-mail: faessler{at}biochem.mpg.de)
Integrin
10
1 is a collagen-binding integrin expressed on chondrocytes. In order to unravel the role of the
10 integrin during development, we generated mice carrying a constitutive deletion of the
10 integrin gene. The mutant mice had a normal lifespan and were fertile but developed a growth retardation of the long bones. Analysis of the skeleton revealed defects in the growth plate after birth characterized by a disturbed columnar arrangement of chondrocytes, abnormal chondrocyte shape and reduced chondrocyte proliferation. Electron microscopy of growth plates from newborn mice revealed an increased number of apoptotic chondrocytes and reduced density of the collagen fibrillar network compared to these structures in control mice. These results demonstrate that integrin
10
1 plays a specific role in growth plate morphogenesis and function.
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