Quantitative analysis of virus and plasmid trafficking in cells

Area of Science:

• Biophysics
• Cell Biology
• Molecular Biology

Background:

• Intracellular transport of DNA carriers is crucial for effective gene delivery.
• Understanding particle trafficking within the cytoplasm is key to optimizing delivery systems.
• Cellular organization influences the efficiency of reaching the nucleus.

Purpose of the Study:

• To develop a physical model for intracellular transport of DNA carriers, including viruses and plasmid DNA.
• To analyze the dynamics of particle movement (diffusion and active transport) within the cytoplasm.
• To quantify the impact of degradation and cellular environment on nuclear delivery efficiency.

Main Methods:

• Combined theoretical and numerical approaches to model particle trafficking.
• Developed a physical model incorporating diffusion, active transport along microtubules, and degradation rates.
• Utilized stochastic descriptions and computational simulations to analyze viral trajectories.

Main Results:

• The model captures the epochal nature of viral trajectories (diffusion vs. active transport).
• Degradation rates provide estimates for delivery limitations within the cytoplasm.
• Calculated probabilities and mean times for particles to reach nuclear pores from the cell membrane.

Conclusions:

• The developed model accurately analyzes viral trajectories and quantitatively estimates nuclear delivery success.
• The findings provide a framework for understanding and improving gene delivery strategies.
• This research contributes to the fundamental understanding of intracellular transport mechanisms for gene therapy applications.