RE: Poster link24 Oct 2024 12:32
Conclusions from the poster:
AVA6103 is a novel peptide drug conjugate (PDC) based on proprietary pre|CISION® technology which incorporates a dipeptide that is specifically cleaved by Fibroblast Activation Protein α (FAP) which results in tumor-specific delivery of the exatecan warhead directly to tumor cells uUsing AVA6103Gen Two pre|CISION® compounds, characterized by varying two key pieces of the chemical structure of pre|CISION® exatecan (the capping group [A] and self-immolative linker [B]), we can modulate both FAP enzyme efficiency (kcat/Km) and the PK properties of each compound–The therapeutic index of exatecan is significantly increased by pre|CISION®enabling, specifically the MTD of compound 1 was 75 times that of conventional exatecan in a daily dosing regimen –
AVA6103 optimizes the bystander effect, where the conjugate is only cleaved by FAP+ fibroblasts, and released exatecan can enter FAP- cancer cells uIn a Patient-derived xenograft model, high intratumoral warhead concentrations are seen at 4hr and 24hr timepoints for several pre|CISION® exatecan compounds, with up to 50-fold higher warhead concentrations in the tumor vs. plasma
pre|CISION® exatecan demonstrates tumor growth inhibition in an efficacy study, where HEK-FAP tumors treated with Compound 1 displayed no growth over a three-week period, and increased survival vs. vehicle treated tumors
50 fold concentrate in tumour, also massive!!