Framework to function: mechanosensitive regulators of gene transcription.

Area of Science:

• Cellular and Molecular Mechanobiology
• Biophysics
• Gene Regulation

Background:

• Traditionally, changes in cell stiffness and environment were viewed as aging or disease outcomes.
• Emerging understanding highlights mechanical factors as causative mediators of cell growth and organ size control.
• Mechanical cues initiate rapid nuclear translocation of transcriptional co-factors.

Purpose of the Study:

• To review the molecular mechanisms linking biophysical stimuli to gene-specific transcription.
• To elucidate how cytoplasmic actin dynamics changes are communicated within cells.
• To highlight the collaborative role of MRTFs, YAP, and TAZ as mechano-effectors.

Main Methods:

• Review of existing literature on mechanobiology and transcriptional regulation.
• Focus on molecular pathways involving actin dynamics, YAP, TAZ, and MRTFs.
• Analysis of how mechanical signals trigger nuclear localization and gene expression.

Main Results:

• Biophysical stimuli, such as matrix stiffness, directly impact cell behavior and organ size.
• Mechanical cues induce rapid cytoplasmic-to-nuclear translocation of transcriptional co-factors like MRTFs, YAP, and TAZ.
• These co-factors initiate specific transcriptional programs in response to mechanical signals.

Conclusions:

• MRTF, YAP, and TAZ function collaboratively as key mechano-effectors in cellular responses.
• Understanding these molecular mechanisms is crucial for comprehending cell growth and organ homeostasis.
• Mechanobiology offers new insights into fundamental physiological and pathological processes.