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| 1 | Bioactive extracellular matrix scaffolds engineered with proangiogenic proteoglycan mimetics and loaded with endothelial progenitor cells promote neovascularization and diabetic wound healing显示文摘Diabetic ischemic wound treatment remains a critical clinical challenge.Neovascularization plays a significant role in wound healing during all stages of the tissue repair process.Strategies that enhance angiogenesis and neovascularization and improve ischemic pathology may promote the healing of poor wounds,particularly diabetic wounds in highly ischemic conditions.We previously identified a cyclic peptide LXW7 that specifically binds to integrinαvβ3 on endothelial progenitor cells(EPCs)and endothelial cells(ECs),activates vascular endothelial growth factor(VEGF)receptors,and promotes EC growth and maturation.In this study,we designed and synthesized a multi-functional pro-angiogenic molecule by grafting LXW7 and collagen-binding peptides(SILY)to a dermatan sulfate(DS)glycosaminoglycan backbone,named LXW7-DS-SILY,and further employed this multi-functional molecule to functionalize collagen-based extracellular matrix(ECM)scaffolds.We confirmed that LXW7-DS-SILY modification significantly promoted EPC attachment and growth on the ECM scaffolds in vitro and supported EPC survival in vivo in the ischemic environment.When applied in an established Zucker Diabetic Fatty(ZDF)rat ischemic skin flap model,LXW7-DS-SILY-functionalized ECM scaffolds loaded with EPCs significantly improved wound healing,enhanced neovascularization and modulated collagen fibrillogenesis in the ischemic environment.Altogether,this study provides a promising novel treatment to accelerate diabetic ischemic wound healing,thereby reducing limb amputation and mortality of diabetic patients. | Siqi He Tanaya Walimbe Hongyuan Chen Kewa Gao Priyadarsini Kumar Yifan Wei Dake Hao Ruiwu Liu Diana L.Farmer Kit S.Lam Jianda Zhou Alyssa Panitch Aijun Wang | 2022 | Bioactive Materials2022，7，4： | 2 |
| 2 | 高分辨魔角旋转核磁共振技术 (HR/MAS)在固相合成中的应用显示文摘使用微量探头分析了不同树脂、溶剂、温度对1 HNMR线宽的影响 ,并运用高分辨魔角旋转核磁共振技术跟踪固相载体上羟基氨基酸的糖基化反应 .该研究表明使用高分辨魔角旋转核磁共振探头可以快速、直接鉴定树脂上的产物 ,是固相合成中重要的分析工具 . | 贺文义 姚念环 Kit S.LAM 刘刚 | 2003 | 波谱学杂志2003，20，2： | 1 |
| 3 | 核磁共振技术(NMR)在组合化学中的应用显示文摘对科学产生最大影响的分析方法是核磁共振技术 (NMR) ,它被广泛用于许多领域。本文结合作者的研究结果评述了NMR在组合化学中的应用 ,着重于NMR在固相合成的应用、液态NMR和NMR在高通量筛选中的应用。 | 姚念环 贺文义 刘刚 Kit S.LAM | 2004 | 化学进展2004，16，5： | 0 |
| 4 | 高分辨魔角核磁共振技术(HR/MAS)在固相合成中的应用显示文摘 九十年代初发展的高分辨魔角核磁共振技术直接用于跟踪固相合成反应,提供固载化化合物的结构信息.该技术采用魔角旋转消除非均相溶液中磁化率不同而造成的谱线加宽[1].…… | 姚念环 贺文义 Kit S.LAM 刘刚 | 2003 | 有机化学2003，23，z1： | 0 |
| 5 | A bio-instructive parylene-based conformal coating suppresses thrombosis and intimal hyperplasia of implantable vascular devices显示文摘Implantable vascular devices are widely used in clinical treatments for various vascular diseases. However, current approved clinical implantable vascular devices generally have high failure rates primarily due to their surface lacking inherent functional endothelium. Here, inspired by the pathological mechanisms of vascular device failure and physiological functions of native endothelium, we developed a new generation of bioactive parylene (poly(p-xylylene))-based conformal coating to address these challenges of the vascular devices. This coating used a polyethylene glycol (PEG) linker to introduce an endothelial progenitor cell (EPC) specific binding ligand LXW7 (cGRGDdvc) onto the vascular devices for preventing platelet adhesion and selectively capturing endogenous EPCs. Also, we confirmed the long-term stability and function of this coating in human serum. Using two vascular disease-related large animal models, a porcine carotid artery interposition model and a porcine carotid artery-jugular vein arteriovenous graft model, we demonstrated that this coating enabled rapid generation of self-renewable “living” endothelium on the blood contacting surface of the expanded polytetrafluoroethylene (ePTFE) grafts after implantation. We expect this easy-to-apply conformal coating will present a promising avenue to engineer surface properties of “off-the-shelf” implantable vascular devices for long-lasting performance in the clinical settings. | Dake Hao Jonathan Lin Ruiwu Liu Christopher Pivetti Kaeli Yamashiro Linda M.Schutzman Junichiro Sageshima Mimmie Kwong Nataliya Bahatyrevich Diana L.Farmer Misty D.Humphries Kit S.Lam Alyssa Panitch Aijun Wang | 2023 | Bioactive Materials2023，，10： | 0 |
| 6 | A bioactive material with dual integrin-targeting ligands regulates specific endogenous cell adhesion and promotes vascularized bone regeneration in adult and fetal bone defects显示文摘Significant progress has been made in designing bone materials capable of directing endogenous cells to promote vascularized bone regeneration.However,current strategies lack regulation of the specific endogenous cell populations for vascularized bone regeneration,thus leading to adverse tissue formation and decreased regenerative efficiency.Here,we engineered a biomaterial to regulate endogenous cell adhesion and promote vascularized bone regeneration.The biomaterial works by presenting two synthetic ligands,LLP2A and LXW7,explicitly targeting integrinsα4β1 andαvβ3,respectively,expressed on the surfaces of the cells related to bone formation and vascularization,such as mesenchymal stem cells(MSCs),osteoblasts,endothelial progenitor cells(EPCs),and endothelial cells(ECs).In vitro,the LLP2A/LXW7 modified biomaterial improved the adhesion of MSCs,osteoblasts,EPCs,and ECs via integrinα4β1 andαvβ3,respectively.In an adult rat calvarial bone defect model,the LLP2A/LXW7 modified biomaterial enhanced bone formation and vascularization by synergistically regulating endogenous cells with osteogenic and angiogenic potentials,such as DLX5^(+)cells,osteocalcin^(+)cells,CD34^(+)/CD45-cells and CD31^(+)cells.In a fetal sheep spinal bone defect model,the LLP2A/LXW7 modified biomaterial augmented bone formation and vascularization without any adverse effects.This innovative biomaterial offers an off-the-shelf,easy-to-use,and biologically safe product suitable for vascularized bone regeneration in both fetal and adult disease environments. | Dake Hao Ruiwu Liu Tomas Gonzalez Fernandez Christopher Pivetti Jordan Elizabeth Jackson Edwin Samuel Kulubya Hong-Jiang Jiang Hai-Yang Ju Wen-Liang Liu Alyssa Panitch Kit S.Lam JKent Leach Diana L.Farmer Aijun Wang | 2023 | Bioactive Materials2023，，2： | 0 |
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