Jérémie Le Pen _none

Our lab focuses on innate immunity to RNA viruses.

The genomes of humans and other animals harbor genes that have naturally evolved to combat viral infections and promote health. Our goal is to identify these antiviral strategies shaped by nature and uncover their mechanisms of action. 

Leveraging Dual Model Systems to Uncover Evolutionary Insights into Antiviral Immunity

By leveraging the strengths of both human cell systems and the C. elegans animal model organism, we gain complementary insights. Human cells reveal strategies critical for combating viruses directly relevant to human health, such as SARS-CoV-2, Influenza, and Yellow Fever. Meanwhile, C. elegans enables ambitious whole-organism experiments to explore antiviral defenses on a population scale. This dual approach allows us to address fundamental questions about the evolution of antiviral innate immunity.

Unraveling Virus-Host Interactions: From Gene to Mechanism

The interactions between viruses and their host cells provide unique opportunities to uncover core cellular processes. Our research begins by perturbing the host genome using approaches such as forward EMS mutagenesis and CRISPR-based knockout methods. We then perform an initial binary assessment—‘more virus or less virus?’—to identify key genetic factors. This approach often leads to unexpected explorations in areas such as foreign RNA sensing, cellular RNA quality control, and the molecular mechanisms underlying cell membrane fusion.

Understanding Individual Responses to Viral Infections: A Collaborative Approach

Collaboration is central to our mission. Why do different individuals exhibit varying susceptibility to viral infections? We partner with field biologists and human geneticists to investigate how genetic variation shapes individual responses to viral infections and live attenuated vaccines. These partnerships bridge basic science inquiries with translational applications, advancing personalized medicine and targeted antiviral therapies.