Capstan Therapeutics has successfully dosed the first participants in a Phase 1 trial of CPTX2309, an innovative in vivo CAR-T therapy targeting B cell-mediated autoimmune disorders.
CPTX2309 uses targeted lipid nanoparticles to deliver anti-CD19 CAR mRNA directly to CD8+ T cells, eliminating the need for chemotherapy, cell manipulation, or viral vectors.
The therapy demonstrated rapid, deep, and transient B cell depletion in preclinical studies, with B cell repopulation occurring predominantly with naïve B cells.
The Phase 1 trial in healthy volunteers will evaluate safety, tolerability, and pharmacodynamic activity to determine optimal dosing for future autoimmune disease studies.