Abstract
GB004 is a small molecule prolyl hydroxylase inhibitor (PHDi) that stabilizes hypoxia inducible factors (HIF1-α), key transcription factors involved in the protective cellular responses at the intersection of hypoxia and inflammation. GB004 was selected based on its gut-targeted profile to limit systemic on-target effects associated with HIF1-α stabilization. Consistent with this, orally administered GB004 in a healthy non-human primate model engaged HIF-related genes in the gut, and, in animal models of colitis, demonstrated a significant reduction in disease activity, improvements in histologic measures, and greater exposure in GI tissue relative to plasma. GB004 is in clinical development for treatment of inflammatory bowel disease (IBD) and was shown to be safe in a single ascending dose study. The study described here evaluates the safety, tolerability, and pharmacokinetics (PK) of multiple daily doses of GB004 in plasma and colon biopsies.
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