Passive nuclear transport deviates from Fickian behavior in prostate and breast cell types

Area of Science:

• Cell Biology
• Biophysics

Background:

• Nuclear transport is vital for cell function and drug delivery.
• Understanding passive nuclear transport across cell types and states is limited.

Purpose of the Study:

• Investigate passive nuclear transport of various molecular weights (500-20,000 Da).
• Examine how cell phenotype changes affect nuclear transport.
• Explore implications for cellular transformation and cancer.

Main Methods:

• Utilized fluorescent molecular cargoes of varying sizes.
• Studied passive nuclear transport across multiple cell lines.
• Induced an invasive-like phenotype in breast cells using TGF-Beta.

Main Results:

• Observed cell-line-specific restrictions in nuclear transport.
• Passive nuclear uptake showed non-monotonic dependence on molecular weight, indicating non-Fickian transport.
• Phenotypic transformation altered nuclear permeability, mimicking cancer cell behavior.

Conclusions:

• Passive nuclear transport is complex and cell-specific.
• Phenotypic changes significantly impact nuclear permeability.
• Findings offer insights into biophysical alterations during cancer development.