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Spatial and temporal expression of the beta1D integrin during mouse development

A van der Flier¹, A C Gaspar, S Thorsteinsdóttir

¹Division of Cell Biology, The Netherlands Cancer Institute, Amsterdam.

Developmental Dynamics : an Official Publication of the American Association of Anatomists

|February 12, 1998

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The beta1D integrin subunit is crucial for mature cardiac and skeletal muscle structure and function. Its expression increases significantly during development, becoming the primary variant in adult muscle cells.

Area of Science:

Muscle Biology
Cellular and Molecular Medicine
Developmental Biology

Background:

Integrin beta1 subunits are critical for cell adhesion and signaling.
Beta1D is a muscle-specific integrin beta1 isoform.
Understanding beta1D's role is key to muscle health.

Purpose of the Study:

Characterize beta1D expression in muscle development.
Investigate beta1D's association with alpha subunits.
Determine beta1D's functional role in mature muscle.

Main Methods:

Monoclonal antibodies specific for beta1D.
Immunoprecipitation studies.
Expression analysis during mouse development.

Main Results:

Related Experiment Videos

Beta1D expression is induced upon myoblast differentiation.
Beta1D associates with multiple alpha subunits (alpha3A, alpha5, alpha7A/B).
Beta1D expression increases during development, replacing beta1A in adult cardiac and skeletal muscle.

Conclusions:

Beta1D is essential for the cytoarchitecture of mature muscle.
Beta1D contributes to the functional integrity of cardiac and skeletal muscle cells.
Beta1D is concentrated at key structural sites like myotendinous junctions and costameres.