Circle Pharma vs Pliant Therapeutics
Side-by-side comparison of AI visibility scores, market position, and capabilities
Circle Pharma develops orally deliverable macrocycle drug candidates targeting intracellular protein-protein interactions in cancer; raised $90M Series B in 2023 led by Novo Holdings and Foresite Capital; headquartered in San Francisco;
About
Circle Pharma is a clinical-stage biopharmaceutical company founded in 2016 by Matthew Jacobson, Siegfried Bhagwati, and Grace Aldrovandi, headquartered in San Francisco, California. The company is developing a new class of therapeutics — cell-permeable macrocycles — designed to inhibit intracellular protein-protein interactions (PPIs) that have historically been considered "undruggable." Protein-protein interactions control critical cellular processes including cell division, apoptosis (programmed cell death), and gene expression. Dysregulation of these interactions drives many cancers, but their large, flat interaction surfaces are difficult to block with small molecules, and biologics (antibodies) cannot cross cell membranes to reach intracellular targets. Circle Pharma's macrocycles are medium-sized ring-shaped molecules engineered to be both cell-permeable and orally bioavailable — a combination rarely achieved — enabling them to reach and inhibit these targets.
Pliant Therapeutics is a clinical-stage biotech (Nasdaq: PLRX) developing integrin inhibitors for fibrotic diseases, with lead program bexotegrast in Phase 2b/3 trials for idiopathic pulmonary fibrosis.
About
Pliant Therapeutics develops small molecule integrin inhibitors targeting the pathological tissue scarring (fibrosis) that drives diseases including idiopathic pulmonary fibrosis (IPF), primary sclerosing cholangitis (PSC), and nonalcoholic steatohepatitis (NASH/MASH). Integrins are cell surface receptors that activate TGF-β, the master regulator of fibrosis — blocking specific integrin subtypes (αvβ6, αvβ1) can halt or reverse fibrosis progression without broadly suppressing immunity.
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