E-Cadherin Regulates Mitochondrial Membrane Potential in Cancer Cells

Area of Science:

• Cell Biology
• Cancer Research
• Biophysics

Background:

• Epithelial cancer cells exhibit elevated mitochondrial membrane potential (ΔΨm), linked to increased invasiveness and metastasis.
• Mechanisms regulating cancer cell ΔΨm within the tumor microenvironment (TME) are not fully understood.

Purpose of the Study:

• To investigate how biophysical confinement cues in the TME regulate cancer cell ΔΨm.
• To elucidate the role of E-cadherin in mediating these effects.

Main Methods:

• Utilized an in vitro micropatterning platform to mimic TME biophysical confinement.
• Analyzed spatial distribution of ΔΨm in cancer cell micropatterns.
• Manipulated E-cadherin expression and adhesion in breast cancer cell lines (MDA-MB-231 and MCF-7).

Main Results:

• Micropatterning induced spatial ΔΨm distribution correlating with E-cadherin levels.
• E-cadherin-negative MDA-MB-231 cells showed different ΔΨm patterns than high E-cadherin expressing MCF-7 cells.
• E-cadherin disruption/knockout increased central ΔΨm in MCF-7 cells; overexpression decreased it in both cell types.

Conclusions:

• E-cadherin plays a critical role in regulating cancer cell ΔΨm under biophysical confinement.
• Intercellular adhesion mediated by E-cadherin influences mitochondrial function in the TME.
• Findings provide insights into cancer cell adaptation to the tumor microenvironment.