High-throughput Mucus Microrheology for Phenotyping and Disease Modeling.

Area of Science:

• Biophysics
• Biomaterials Science
• Medical Diagnostics

Background:

• Mucus is vital for epithelial barrier function, capturing inhaled particles and pathogens.
• Altered mucus rheology and impaired clearance are hallmarks of respiratory diseases, increasing infection risk.
• Current rheology assays are not suitable for small mucus volumes from in vitro or ex vivo models.

Purpose of the Study:

• To develop a scalable, user-friendly rheometry assay for measuring mucus microrheology.
• To enable detailed study of mucus rheology in disease models and clinical settings.
• To overcome limitations in data accessibility and resource constraints for mucus rheology research.

Main Methods:

• Development of a high-throughput protocol using Differential Dynamic Microscopy (DDM).
• Measurement of frequency-dependent microrheology in minuscule mucus samples (3-10 μL) using standard epifluorescence microscopy.
• Validation with human respiratory mucus from air-liquid-interface (ALI) cultures and clinical cervical mucus samples.

Main Results:

• The DDM-based method reliably measures microrheology of small mucus volumes.
• The assay is user-friendly, requires no specialized equipment, and significantly reduces measurement time.
• Successful application in assessing mucus rheology in airway disease models and clinical samples.

Conclusions:

• The developed DDM method provides a powerful tool for studying mucus rheology across various mucosal systems.
• This advancement facilitates research into disease mechanisms and therapeutic strategies for conditions involving altered mucus.
• The assay's accessibility promotes broader adoption by researchers, accelerating discoveries in mucosal immunology and disease.