Controlling spatial organization of the cell - using surface micro-pillar patterns to manipulate Golgi morphology and...

Area of Science:

• Cell Biology
• Biophysics
• Mechanobiology

Background:

• Cells sense and respond to mechanical cues from their environment.
• Physical cues like surface topography and confinement influence cell shape and function.
• Organelle architecture's response to mechanical cues remains underexplored.

Purpose of the Study:

• Investigate the Golgi-specific transcriptional program during cellular adaptation to pillar-induced confinement.
• Utilize bone marrow-derived mesenchymal stem cells as a model system.
• Understand how extracellular mechanical cues affect organelle structural reorganization.

Main Methods:

• Employing seven distinct polystyrene micro-pillar designs to create varied confinement levels.
• Analyzing gene expression of functionally relevant Golgi genes.
• Correlating gene expression changes with Golgi structural organization and confinement levels.

Main Results:

• Each micro-pillar design elicited a unique gene expression fingerprint for Golgi-related genes.
• The number of affected genes correlated with the degree of confinement and Golgi disruption.
• Demonstrated a direct link between physical cues and specific transcriptional responses in the Golgi.

Conclusions:

• Pillar-enhanced substrates serve as a model to study cellular adaptation to mechanical cues.
• Extracellular mechanical forces, specifically confinement, induce significant Golgi-specific transcriptional changes.
• Highlights the importance of physical cues in regulating organelle structure and cellular fate.