Functional microarray biochips promote micropatterned adhesion-cytoskeleton-nuclear coupling to guide endothelial...

Area of Science:

• Cell biology
• Biomaterials science
• Mechanobiology

Background:

• Microarray biochips enable precise spatial control of cell behavior.
• Geometric constraints influence cell adhesion, morphology, and mechanosensitive signaling.
• Understanding mechanotransduction is crucial for cellular responses.

Purpose of the Study:

• To explore nuclear force-sensing mechanotransduction in human umbilical vein endothelial cells (HUVECs) using a microengineered biochip.
• To investigate the role of spatial confinement in modulating cell signaling pathways.
• To establish a foundation for developing mechanically responsive biomaterials.

Main Methods:

• Fabrication of a microengineered biochip with patterned substrates.
• Culturing human umbilical vein endothelial cells (HUVECs) on the biochip.
• Analyzing focal adhesion nanoarchitectures, cytoskeletal structures, and Piezo1 ion channel activation.

Main Results:

• The patterned substrate facilitated organized assembly of focal adhesions and cytoskeletal structures.
• Mechanical interactions between the extracellular matrix and cytoskeleton enhanced signal transduction to the nucleus.
• Spatial confinement significantly amplified the integrin-cytoskeleton-Piezo1 signaling axis, enhancing Piezo1 activation and calcium influx.
• This amplification led to downstream signaling cascades regulating proliferation, migration, and differentiation.

Conclusions:

• Microarray biochips are effective platforms for studying cell mechanotransduction.
• Microtopographical cues are critical for modulating nuclear force-sensing mechanotransduction in endothelial cells.
• The integrin-cytoskeleton-Piezo1 signaling axis is a key pathway influenced by spatial confinement.