Cationic Hybrid Hydrogels from Amino-Acid-Based Poly(ester amide): Fabrication, Characterization, and Biological Properties
作者:Jun Wu、Dequn Wu、Martha A. Mutschler、Chih-Chang Chu
DOI:10.1002/adfm.201103147
日期:2012.9.25
decreases the compressive modulus of hydrogels. When compared with a pure Pluronic hydrogel, the cationic Arg‐UPEAs/Pluronic hybridhydrogels greatly improve the attachment and proliferation of human fibroblasts on hydrogel surfaces. A bovine aortic endothelial cells (BAEC) viability test in the interior of the hydrogels shows that the positively charged hybridhydrogels can significantly improve the viability
Development of a biocompatible and biodegradable hybrid hydrogel platform for sustained release of ionic drugs
作者:Jun Wu、Xin Zhao、Dequn Wu、Chih-Chang Chu
DOI:10.1039/c4tb00576g
日期:——
We have developed and characterized a new hydrogel platform for ionic drug delivery, incorporating cationic, anionic, and temperature responsive precursors. In vitro biological assays show that these polymers have excellent biocompatibility, controllable biodegradability, and sustained ionic drug release capability.
THERMORESPONSIVE ARGININE-BASED HYDROGELS AS BIOLOGIC CARRIERS
申请人:Chu Chih-Chang
公开号:US20110008441A1
公开(公告)日:2011-01-13
Cationic poly(ester amide) (PEA)-based hydrogels are provided. The hydrogels are fabricated from unsaturated L-arginine base poly(ester-amide) (UArg-PEA) precursors, pluronicDA precursors, or a combination of UArg-PEA and pluronicDA precursors at predetermined precursor composition ratios. PluronicDA/UArg-PEA hybrid hydrogels and pure pluronicDA based hydrogels are thermoresponsive and biodegradable, while pure UArg-PEA base hydrogels are biodegradable but not thermoresponsive. UArg-PEA based, pluronicDA based and hybrid hydrogels can be synthesized from unsaturated arginine-based PEA salts and/or unsaturated pluronic acid polymers. Unsaturated pluronic acid polymers can be synthesized by reacting pluronic acid with acryloylchloride to provided functional vinyl groups at the two chain ends of pluronic acid. The hydrogels can be used to carry and/or release molecules or compounds such as bioactive compounds, can function as biologic carriers for a variety of biomedical applications.
Epoxy-containing poly(ester amides) and method of use
申请人:Katsarava Ramaz
公开号:US20080050419A1
公开(公告)日:2008-02-28
The invention provides aliphatic epoxy-containing PEA polymer compositions with film-forming properties. The aliphatic epoxy di-acids used in the invention PEA compositions include non-toxic fatty aliphatic epoxy homologs. A second, C-protected L-lysine-based monomer can be introduced into the polymer to provide additional chain flexibility. The invention PEA polymer compositions are useful for delivery of bioactive agents when administered internally or used in the manufacture of implantable medical devices. Biodegradable hydrogels can be made using the invention epoxy-containing PEAs.
Bioactive stents for type II diabetics and methods for use thereof
申请人:Carpenter W. Kenneth
公开号:US20050238689A1
公开(公告)日:2005-10-27
The present invention is based on the discovery that a vascular stent or other implantable medical device can be coated with a biodegradable biocompatible polymer to which is attached a bioligand that specifically captures progenitors of endothelial cells (PECs) from the circulating blood to promote endogenous formation of healthy endothelium in Type II diabetics. In one embodiment, the bioligand is a peptide that specifically binds to an integrin receptor on PECs. The invention also provides methods for using such vascular stents and other implantable devices to promote vascular healing in Type II diabetics, for example following mechanical intervention.
本发明基于以下发现:在血管支架或其他植入式医疗设备上涂覆一种可生物降解的生物相容性聚合物,聚合物上附着一种生物配体,该生物配体可从循环血液中特异性捕获内皮细胞祖细胞(PECs),从而促进 II 型糖尿病患者健康内皮的内源性形成。在一个实施方案中,生物配体是一种能与 PECs 上的整合素受体特异性结合的多肽。本发明还提供了使用此类血管支架和其他植入装置促进 II 型糖尿病患者血管愈合的方法,例如在机械干预之后。