Question · Q4 2025
Kevin asked about Kymera's expectations for IRF5 degradation in PBMCs and potentially skin in the multiple ascending dose (MAD) portion of the healthy volunteer study, and how much is known about IRF5 expression in healthy volunteers that impacts these expectations.
Answer
Nello Mainolfi, Founder, President, and CEO, explained that IRF5 can be reliably measured in PBMCs using mass spectrometry. However, IRF5 expression in healthy volunteer skin is extremely low, making it very challenging to measure. He suggested that assessing IRF5 expression in skin might be more feasible in patient populations with cutaneous manifestations, such as lupus or CLE.
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