Amino acid-based poly(ester urea)s (PEU) are emerging as a class of polymers that have shown promise in regenerative medicine applications. Embodiments of the invention relate to the synthesis of PEUs carrying pendent “clickable” groups on modified tyrosine amino acids. The pendent species include alkyne, azide, alkene, tyrosine-phenol, and ketone groups. PEUs with M
w
exceeding 100k Da were obtained via interfacial polycondensation methods and the concentration of pendent groups was varied by copolymerization. The incorporation of derivatizable functionalities is demonstrated using
1
H NMR and UV-Vis spectroscopy methods. Electrospinning was used to fabricate PEU nanofibers with a diameters ranging from 350 nm to 500 nm. The nanofiber matricies possess mechanical strengths suitable for tissue engineering (Young's modulus: 300±45 MPa; tensile stress: 8.5±1.2 MPa). A series of bioactive peptides and fluorescent molecules were conjugated to the surface of the nanofibers following electrospinning using bio-orthogonal reactions in aqueous media.
基于
氨基酸的聚酯
脲(PEU)是一类聚合物,在再生医学应用中表现出了很大的潜力。本发明实施例涉及合成携带修饰
酪氨酸氨基酸上的“可点击”基团的PEU。这些悬挂物种包括
炔烃、偶氮、烯烃、
酪氨酸酚和酮基团。通过界面缩聚法获得了分子量超过100k Da的PEU,并通过共聚反应改变了悬挂基团的浓度。使用1H NMR和UV-Vis光谱方法证明了可衍生化官能团的合并。使用电纺法制备了直径在350 nm至500 nm之间的PEU纳米纤维。纳米纤维基体具有适用于组织工程的机械强度(杨氏模量:300±45 MPa;拉伸应力:8.5±1.2 MPa)。使用
生物正交反应在
水介质中电纺后将一系列
生物活性肽和荧光分子连接到纳米纤维表面。