Innovative in vitro method to study ventilator induced lung injury

Area of Science:

• Pulmonary Medicine
• Biomedical Engineering
• Cell Biology

Background:

• Mechanical ventilation (MV) is crucial for critically ill patients but can cause ventilator-induced lung injury (VILI), leading to acute respiratory distress syndrome (ARDS) and increased mortality.
• Current in vitro models for VILI research often use static or constant pressure, failing to replicate dynamic MV conditions.
• There is a significant need for advanced research platforms and biomarkers to study VILI/ARDS and develop preventative strategies.

Purpose of the Study:

• To develop and validate a novel device capable of applying cyclical pressure to human bronchial cells cultured at an air-liquid interface (ALI).
• To mimic the mechanical stress experienced by lungs during mechanical ventilation.
• To analyze molecular and protein expression changes associated with VILI in response to cyclical pressure.

Main Methods:

• Development of a Cyclical Pressure ALI Device (CPAD) to apply dynamic stress to ALI-cultured human bronchial cells.
• Exposure of cells to cyclical pressure simulating mechanical ventilation.
• Analysis of differentially expressed genes and proteins related to VILI, ARDS, and innate immunity.

Main Results:

• The CPAD successfully applied cyclical stress to ALI-cultured human bronchial cells, mimicking MV conditions.
• Significant differential expression of genes associated with VILI/ARDS and innate immunity was observed.
• Increased expression of relevant proteins was detected, correlating with the applied mechanical stress.

Conclusions:

• The CPAD is an accessible and effective platform for studying functional and phenotypic changes in bronchial cells under conditions mimicking mechanical ventilation.
• This device facilitates the analysis of molecular responses to VILI and provides a potential avenue for future drug screening and development.
• The findings highlight the utility of CPAD in VILI/ARDS research for identifying biomarkers and therapeutic targets.