How memory and adaptation cost shape cell phenotypic dynamics in response to fluctuating environments.

Area of Science:

• Cellular Biology
• Systems Biology
• Theoretical Biology

Background:

• Cells must adapt to environmental fluctuations for survival.
• Adaptation speed depends on how cells 'forget' past conditions.
• Molecular memory mechanisms influence cellular responses.

Purpose of the Study:

• Investigate the impact of two memory models (undated vs. dated) on cellular adaptation.
• Analyze how memory type affects responses to different environmental change patterns.
• Explore the role of adaptation costs in cellular decision-making.

Main Methods:

• Phenomenological modeling of cellular memory.
• Simulation of cellular responses to single-step, periodic, and stochastic environmental changes.
• Analysis of adaptation dynamics and cellular benefits.

Main Results:

• Dated memory enables faster adaptation to single environmental perturbations.
• Optimal memory strategy in periodic environments is context-dependent (period, capacity).
• Both memory types offer similar benefits in stochastic environments.
• Adaptation costs can improve decision-making by delaying response but harm in sudden changes.

Conclusions:

• Cellular memory type significantly influences adaptation dynamics.
• Environmental predictability and cell's memory capacity shape optimal adaptation strategies.
• Adaptation costs play a crucial role in balancing response speed and accuracy.