Breakthrough in RNA Extraction from Precision-Cut Lung Slices Boosts Human Lung Research

Scientists at the University of California, San Diego, have developed a refined method to extract high-quality RNA from precision-cut lung slices (PCLS), overcoming a longstanding challenge in respiratory research. These PCLS—thin sections of living human lung tissue—retain complex cellular architecture and are critical for studying diseases like COPD, asthma, and pulmonary fibrosis. However, the use of agarose, a gel-like substance used to support tissue during slicing, has historically interfered with RNA isolation, leading to degraded samples and inconsistent results. The new protocol, published in Nature Biomedical Engineering, uses a modified enzymatic digestion step that effectively removes agarose without damaging RNA integrity. This advancement enables more accurate gene expression profiling, allowing researchers to analyze real-time molecular responses in human lung tissue. With this breakthrough, studies on drug efficacy, immune responses, and disease mechanisms can now rely on more reliable data. The method’s scalability and compatibility with existing lab workflows make it a transformative tool for biomedical research. As the field moves toward personalized medicine, these improved PCLS models could accelerate the development of targeted therapies for lung diseases worldwide.