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Related Experiment Videos

Computational modeling of morphogenesis regulated by mechanical feedback.

Ashok Ramasubramanian1, Larry A Taber

  • 1Department of Biomedical Engineering, Washington University, Campus Box 1097, St. Louis, MO 63130, USA.

Biomechanics and Modeling in Mechanobiology
|February 24, 2007
PubMed
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Mechanical forces drive tissue shape changes during development. This study proposes that changes in target stress, influenced by genes, regulate these morphogenetic processes using computational models.

Area of Science:

  • Developmental Biology
  • Biophysics
  • Computational Biology

Background:

  • Mechanical forces are crucial for embryonic development and morphogenesis.
  • The precise role of tissue stress in regulating these shape changes is not fully understood.

Purpose of the Study:

  • To investigate the hypothesis that changes in homeostatic tissue stress (target stress) drive morphogenetic processes.
  • To model how regional variations in target stress can lead to complex epithelial bending and tissue deformation.

Main Methods:

  • Utilized computational modeling with ABAQUS finite element code.
  • Incorporated growth and cytoskeletal contraction regulated by stress-based mechanical feedback.
  • Simulated bending of bilayered beams and invagination of cylindrical and spherical shells.

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Main Results:

  • Demonstrated that regional variations in target stress can induce complex morphogenetic behaviors.
  • Showcased how stress-based feedback regulates growth and cytoskeletal contraction.
  • Provided insights into the mechanical regulation of epithelial bending and tissue invagination.

Conclusions:

  • Changes in target stress, potentially gene-modulated, are a key mechanism driving morphogenesis.
  • Computational models offer valuable insights into the mechanical underpinnings of developmental shape changes.
  • Further mechanical considerations are essential for understanding morphogenetic mechanisms.