Modeling Extracellular Vesicles-Mediated Interactions of Cells in the Tumor Microenvironment

Area of Science:

• Cell biology
• Biophysics
• Systems biology

Background:

• Extracellular vesicles (EVs) mediate intercellular communication, influencing critical biological processes such as cancer progression, inflammation, and apoptosis.
• EVs act as external stimuli, modulating receptor pathways and particle release in target cells.
• This communication can form biological feedback loops, where donor and target cells influence each other's release rates.

Purpose of the Study:

• To mathematically model the frequency response of cellular internalization of EVs.
• To adapt the unilateral communication model to a closed-loop system for analyzing bilateral interactions.
• To investigate the impact of cell distance and EV reaction rates on overall cell release.

Main Methods:

• Derivation of the frequency response for an EV internalization function within a unilateral communication framework.
• Adaptation of the unilateral model to a closed-loop system to determine the frequency response of bilateral cell interactions.
• Analysis of overall cell release, combining natural and induced release mechanisms.

Main Results:

• The frequency response of the unilateral internalization function was successfully derived.
• The model was extended to accurately represent bilateral communication systems.
• Cellular release patterns were quantified and compared based on varying inter-cell distances and EV reaction kinetics.

Conclusions:

• The study provides a mathematical framework for understanding EV-mediated intercellular communication dynamics.
• The findings highlight the importance of spatial arrangement and reaction rates in modulating cellular responses to EVs.
• This work contributes to a deeper understanding of how EVs orchestrate complex biological processes within the tumor microenvironment.