A composition includes at least one biologically active agent covalently attached to a first polymerizing molecule that is adapted to undergo a free radical polymerization. The first polymerizing molecule retains the ability to undergo free radical polymerization after attachment of the bioactive agent thereto. The first polymerizing molecule is preferably biocompatible. The polymerizing molecule can, for example. be dihydroxyphenyl-L-alanine (DOPA) or tyrosine. The composition can also include a second component synthesized by reacting at least one core molecule having a plurality of reactive hydrogen groups with at least one multi-isocyanate functional molecule to create a conjugate including terminal isocyanate groups. The conjugate molecule is reacted with a second polymerizing molecule that is adapted to undergo a free radical polymerization. The second polymerizing molecule includes a reactive hydrogen to react with the isocyanate groups of the conjugate. The second polymerizing molecule retains the ability to undergo the free radical polymerization after reaction with the conjugate. In several embodiments, the first polymerizing molecule and the second polymerizing molecule are the same and dihydroxyphenyl-L-alanine (DOPA) or tyrosine.
一种组合物包括至少一种
生物活性剂,其共价附着在适合进行自由基聚合的第一聚合分子上。附着
生物活性剂后,第一聚合分子仍保留进行自由基聚合的能力。第一聚合分子最好是
生物相容性的。聚合分子可以是二羟基苯丙
氨酸(
DOPA)或
酪氨酸等。该组合物还可以包括通过将至少一个具有多个反应性氢基团的核心分子与至少一个多
异氰酸酯功能分子反应合成的第二成分,从而创建包括末端
异氰酸酯基团的共轭物。共轭分子与适合进行自由基聚合的第二聚合分子反应。第二聚合分子包括反应性氢,以与共轭体的
异氰酸酯基团反应。第二聚合分子在与共轭体反应后仍保留进行自由基聚合的能力。在几种实施方式中,第一聚合分子和第二聚合分子是相同的,例如二羟基苯丙
氨酸(
DOPA)或
酪氨酸。