Ying Liu

Publications (4)3.39 Total impact

• Article: A novel strategy to engineer small-diameter vascular grafts from marrow-derived mesenchymal stem cells.

  Jie Zhao, Liangqi Liu, Jing Wei, Dongyang Ma, Wenxin Geng, Xingrong Yan, Jun Zhu, Huicong Du, Ying Liu, Liwen Li, Fulin Chen
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  ABSTRACT: Tissue-engineered blood vessels have mainly relied on endothelial cells (ECs), smooth muscle cells (SMCs), and biocompatible materials. However, long-term results have revealed several material-related failures, such as stenosis, thromboembolization, and the risk of infection. Furthermore, SMCs from elderly persons have reduced capacity in proliferation and collagen production. Mesenchymal stem cells (MSCs) have the ability to differentiate into multiple cell lineages, including osteoblasts, chondrocytes, ECs, and SMCs. In the current experiment, rabbit MSCs were cultured to form a cell sheet. A tissue-engineered vascular graft (TEVG) was fabricated by rolling the MSC sheet around a mandrel. The TEVG was implanted into a defect of the common carotid artery after it was examined macroscopically and microscopically. Hematoxylin and eosin staining showed that cell sheet was composed of five to seven layers of cells with the thickness of 40-50 µm. Results from the adhesion assay revealed that MSCs had similar antiplatelet adhesion property to ECs. Histological analysis of TEVGs showed that the layers of the cell sheet had fully fused in vitro. After implantation, TEVGs had excellent patency and integrated well with the native vessel. The structure of the TEVGs was similar to that of the native artery 4 weeks after implantation. Electron microscopy showed that the implanted TEVGs endothelialized. These results indicated that a completely biological TEVG could be assembled with autologous MSCs. These TEVGs are useful for revascularization in humans, which would reduce the occurrence of complications caused by foreign materials.
  Artificial Organs 07/2011; 36(1):93-101. · 2.00 Impact Factor
• Article: A genetically synthetic protein-based cationic polymer for siRNA delivery.

  Ying Liu, Zhilong Jia, Liwen Li, Fulin Chen
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  ABSTRACT: In recent years, a large number of researchers have paid much attention on small interfering RNA (siRNA) after the advent of RNA interference technology, which has been harnessed as an efficient way of sequence-specific gene silencing in gene therapy, enables elucidation of gene functions, and the identification of new drug targets. Despite tremendous progress has been made in novel delivery systems and vectors via formulation of polyplexes and conjugations, such as cationic polymers (LPEI, BPEI), cationic liposome (DOTAP), peptides (CPP), unmet needs still exist. Many cationic agents used for condensing siRNA often exhibits severe cytotoxicity, which limits clinical applications, and is obliged to be handled. Thus great interest in searching for novel and sophisticated polymeric vectors has been spurred. Herein we proposed a genetically synthetic protein-based polymer, which is also referred to as elastin-like polypeptides (ELPs) excerpted from human tropoelastin highly repetitive sequence, Val-Pro-Gly-Xaa-Gly, where the "guest residue" Xaa is any amino acid except Pro. Thus, if we alternate the "guest residue" Xaa to Lys or Arg, to a significant extent, it can emerge as a powerful cationic polymer for siRNA delivery carrier, and hopefully it will be put into practice in the near future.
  Medical Hypotheses 10/2010; 76(2):239-40. · 1.39 Impact Factor
• Article: Service Composition Based Software Solution Design: A Case Study in Automobile Supply Chain.

  Tong Mo, Jingmin Xu, Zhongjie Wang, Yufei Ma, He Yuan Huang, Yuan Wang, Ying Liu, Jun Zhu, Xiaofei Xu
  IJSSMET. 01/2010; 1:19-32.
• Conference Proceeding: A segment-based approach for reconcilable model transformation.

  Xin Zhou, Ying Liu, Jun Zhu
  Proceedings of the 6th joint meeting of the European Software Engineering Conference and the ACM SIGSOFT International Symposium on Foundations of Software Engineering, 2007, Dubrovnik, Croatia, September 3-7, 2007, Companion Papers; 01/2007