The invention provides new aliphatic diester-di-acid-containing PEA polymer compositions with significant improvement in hydrolytic degradation rates as compared to aliphatic di-acid-containing PEA polymers. The di-acids used in the invention PEA compositions include non-toxic fatty aliphatic homologs. These molecules inherently contain two-ester groups, which easily can be cleaved by biotic (enzymatic) and abiotic hydrolysis. Additional di-acid-type compounds useful for active polycondensation are α,ω-alkylene dicarboxylates composed of short aliphatic non toxic diols and di-acids. In addition, the invention PEA polymer compositions optionally can include a second monomer, such as a C-protected L-lysine-based monomer, to introduce additional chain flexibility into the polymer. The invention PEA polymer compositions are useful for delivery of bioactive agents when administered internally.
该发明提供了含有新的脂肪族二酯二酸的
PEA聚合物组合物,其在
水解降解速率方面与含有脂肪族二酸的
PEA聚合物相比具有显着改善。该发明
PEA组合物中使用的二酸包括无毒脂肪族同系物。这些分子固有地包含两个酯基团,可以很容易地被
生物(酶促)和非
生物水解切断。用于活性缩聚的其他二酸型化合物包括由短链脂肪族无毒二醇和二酸组成的α,ω-烷基二
羧酸酯。此外,该发明
PEA聚合物组合物可以选择性地包括第二单体,例如基于C-保护的
L-赖氨酸单体,以在聚合物中引入额外的链柔性。该发明
PEA聚合物组合物在内部给药时用于传递
生物活性剂。