Quantification of Cell-Substrate Adhesion Area and Cell Shape Distributions in MCF7 Cell Monolayers

Area of Science:

• Cell Biology
• Biophysics
• Microscopy

Background:

• Confluent adherent cell monolayers are crucial models for studying cellular dynamics.
• Quantifying focal adhesions and cell shape provides insights into cell-cell interactions and substrate adhesion.
• Understanding these parameters is vital for characterizing forces like actomyosin contractility.

Purpose of the Study:

• To present novel methods for quantifying focal adhesion parameters (number, size) and cell shape descriptors in cell monolayers.
• To enable detailed analysis of cell adhesion and shape using standard confocal imaging techniques.
• To provide a versatile protocol applicable to various stained cellular structures.

Main Methods:

• Utilized confocal microscopy on stained cell monolayers (paxillin for focal adhesions, junction plakoglobin and actin for cell borders).
• Employed standard cell culture and staining protocols with single focal plane images.
• Performed image analysis using publicly available image processing software.

Main Results:

• Successfully quantified the number and size distribution of focal adhesions.
• Characterized cell shape using cell shape index and other descriptors.
• Demonstrated the ability to differentiate cell shape distributions within monolayers.

Conclusions:

• The presented methods offer a robust approach to quantify key parameters of adherent cell monolayers.
• These protocols can be adapted for analyzing various cellular structures, enhancing their utility.
• The quantification of focal adhesions and cell shape aids in understanding dynamic cellular forces and tissue mechanics.