Affilin - Precision Targeting Technology for Protein Drug Conjugates - Medical / Health Care
Several of the Navigo-created, ready-to-go Affilin molecules against solid tumor targets are currently developed as protein-drug conjugates (PDCs), by combining them to a half-life extending module and an engineered toxin-carrying moiety. Compared to notoriously difficult-to-produce and inhomogeneous Antibody-Drug Conjugates (ADCs), Affilin®-based PDCs have clear advantages. They are easily assembled from a specificity-conferring Affilin®, a half-life extending module and a toxin-carrying moiety. Each of those modules can separately be optimized for its particular task and together they can be flexibly assembled into final drug candidates.
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Affilin®-based PDCs can be single chain molecules, with engineered targeted carrier domains for specific drug conjugation sites and thus have a distinct Affilin®-drug ratio for minimal adverse effects. ADC manufacturability issues are greatly simplified by single chain Affilin®-drug conjugate expression in E. coli.
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Affilin -Based Protein-Drug Conjugates
In a modular approach, the specificity conferring Affilin® targeting unit is coupled to a carrier unit with engineered sites for site-specific coupling of a cytotoxic payload. A half-life extending module can optionally also be added (not shown). By separating the carrier unit from the targeting unit, either one can be optimized and adjusted independently. Due to site-specific coupling, Affilin®-drug conjugates ensure homogenous end-products with defined drug-Affilin® ratios.