UMC Utrecht Researchers Discover RNA Splicing's Role in Immune Response, Paving Way for Targeted Therapies
Researchers at University Medical Center (UMC) Utrecht have published a study in Nature Communications revealing a significant mechanism by which immune cells respond to infections. The study highlights the role of alternative RNA splicing in shaping immune responses, particularly in monocytes, a type of innate immune cell. Using long-read RNA sequencing, the researchers mapped full-length RNA transcripts in human monocytes before and after activation, identifying over 24,000 isoforms, many of which were previously unknown. The study found that immune activation leads to 'isoform switching,' where monocytes produce longer, fully functional RNA variants that enhance protein production. This discovery provides new insights into immune-mediated diseases like rheumatoid arthritis and lupus, suggesting that disease mechanisms may depend on the specific isoforms produced and their translation efficiency. 
