Competitive Affinity Release for Long-Term Delivery of Antibodies from Hydrogels
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Huynh, Vincent
[1
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Wylie, Ryan G.
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McMaster Univ, Dept Chem & Chem Biol, 1280 Main St W ABB 261A, Hamilton, ON L8S 4M1, CanadaMcMaster Univ, Dept Chem & Chem Biol, 1280 Main St W ABB 261A, Hamilton, ON L8S 4M1, Canada
Wylie, Ryan G.
[1
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[1] McMaster Univ, Dept Chem & Chem Biol, 1280 Main St W ABB 261A, Hamilton, ON L8S 4M1, Canada
With increased clinical use of antibodies, long-term delivery strategies are needed to decrease injection frequency and improve health outcomes. A three-component drug-delivery system was developed for competitive affinity release of a streptavidin-antibody conjugate from agarose-desthiobiotin hydrogels via controlled dissolution of sparingly soluble biotin derivatives. The antibody conjugate was localized in the hydrogel through streptavidin-desthiobiotin complexation. Dissolution of sparingly soluble biotin derivatives disrupts streptavidin-desthiobiotin complexation for controlled release of the antibody conjugate. Release was tuned by altering the total biotin derivative concentration without further hydrogel or antibody modification. First-order tunable release of bioactive Avastin, a therapeutic anti-VEGF antibody, was demonstrated from a non-cytotoxic system for over 100days.