METHODS FOR POST-FABRICATION FUNCTIONALIZATION OF POLY(ESTER UREAS)
    6.
    发明公开
    METHODS FOR POST-FABRICATION FUNCTIONALIZATION OF POLY(ESTER UREAS) 审中-公开
    VERFAHREN ZUR FUNKTIONALISIERUNG VON POLY(ESTERHARNSTOFFEN)NACH DER HERSTELLUNG

    公开(公告)号:EP3052471A4

    公开(公告)日:2017-06-14

    申请号:EP14848810

    申请日:2014-09-30

    申请人: UNIV AKRON

    摘要: 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 Mw 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 1H 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.

    摘要翻译: 基于氨基酸的聚(酯脲)(PEU)正在成为一类在再生医学应用中显示出前景的聚合物。 本发明的实施方案涉及在修饰的酪氨酸氨基酸上携带悬挂的“可点击”基团的PEU的合成。 悬挂物种包括炔烃,叠氮化物,烯烃,酪氨酸 - 苯酚和酮基团。 通过界面缩聚法获得Mw超过100kDa的PEU,并且通过共聚改变侧基的浓度。 使用1 H NMR和UV-Vis光谱学方法证实了可衍生官能团的结合。 静电纺丝被用于制造直径范围从350nm到500nm的PEU纳米纤维。 纳米纤维材料具有适合于组织工程学的机械强度(杨氏模量:300±45MPa;拉伸应力:8.5±1.2MPa)。 在含水介质中使用生物正交反应进行电纺丝后,将一系列生物活性肽和荧光分子缀合至纳米纤维的表面。