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[Polymeric systems with antithrombin activity for thermally activated targeting].
I L Valuev1, A V Pan, M A Rozenfel'd
1Toptchiev Institute of Petrochemical Synthesis, Moscow, 119912 Russia. ivaluev@ips.ac.ru
Prikladnaia Biokhimiia I Mikrobiologiia
|May 21, 2003
Summary
Researchers synthesized novel copolymers with lower critical solution temperature (LCST) and immobilized hirudin for antithrombin activity. Increasing hirudin content raised LCST, but activity decreased with higher copolymer levels.
Area of Science:
- Polymer Chemistry
- Biomaterials Science
Context:
- Development of advanced polymeric materials with tunable properties.
- Need for effective biomolecules immobilization strategies.
Purpose:
- To synthesize N,N-diethylacrylamide and N-acryloylphthalimide copolymers exhibiting lower critical solution temperature (LCST).
- To create polymeric systems with antithrombin activity by immobilizing hirudin onto these copolymers.
- To investigate the relationship between hirudin content, LCST, and antithrombin activity.
Summary:
- Radical copolymerization yielded N,N-diethylacrylamide and N-acryloylphthalimide copolymers with LCST.
- Immobilization of hirudin onto copolymer phthalimide groups created systems with both antithrombin activity and LCST.
- Increased hirudin content correlated with higher LCST, while antithrombin activity decreased inversely with copolymer content, reaching 6% of native hirudin activity.
Impact:
- Demonstrates a method for creating functional biomaterials with controlled thermal and biological properties.
- Highlights the trade-off between immobilization efficiency and retained biological activity in copolymer systems.
- Provides insights into the design of novel drug delivery or anticoagulant materials.