title: Regulatory roles of interferon-inducible protein 204 on differentiation and vasculogenic activity of endothelial progenitor cells.
abstract: Endothelial progenitor cells (EPCs) have shown great potential in angiogenesis either by their differentiation into endothelial cells or by secretion of angiogenic factors. Interferon-inducible protein 204 (Ifi204) has been reported to participate in the regulation of cell growth and differentiation. However, its role in differentiation of EPCs remains unknown. We proposed that Ifi204 could modulate the differentiation and regenerative abilities of EPCs.
  
  
  
  Ifi204-expressing lentivirus and Ifi204 siRNA were introduced into EPCs to overexpress and suppress the expression of Ifi204. Using fluorescence-activated cell sorting, immunocytochemistry, and quantitative PCR, endothelial markers including CD31, VE-cadherin, and vWF were detected in the modified EPCs. An in-vitro incorporation assay and a colony-forming assay were also performed.
  
  
  
  Evidence showed that Ifi204 inhibition decreased the endothelial differentiation and vasculogenic activities of EPCs in vitro. In mice with hindlimb ischemia, downregulation of Ifi204 in EPCs, which was tracked by our newly synthesized nanofluorogen, impaired neovascularization, with a corresponding reduction in hindlimb blood reperfusion by postoperative day 14.
  
  
  
  Ifi204 is required for EPC differentiation and neovascularization in vitro and in vivo. The regulatory roles of Ifi204 in EPC differentiation may benefit the clinical therapy of ischemic vascular diseases.
authors: Institute for Cardiovascular Science & Department of Cardiovascular Surgery of The First Affiliated Hospital, Soochow University, 188 Shizi Street, Suzhou, 215006, China.|Institute for Cardiovascular Science, Soochow University, 708 Renmin Road, Suzhou, 215006, China.
authors: Junjie
authors: J
authors: Yang
authors: Institute for Cardiovascular Science & Department of Cardiovascular Surgery of The First Affiliated Hospital, Soochow University, 188 Shizi Street, Suzhou, 215006, China.
authors: Xiaofei
authors: X
authors: Zhang
authors: Institute for Cardiovascular Science & Department of Cardiovascular Surgery of The First Affiliated Hospital, Soochow University, 188 Shizi Street, Suzhou, 215006, China.
authors: Zhenao
authors: Z
authors: Zhao
authors: Department of Cardiovascular Surgery, Affiliated Shanghai 1st People's Hospital, Shanghai Jiaotong University, Shanghai, 200080, China.
authors: Xizhe
authors: X
authors: Li
authors: Institute for Cardiovascular Science & Department of Cardiovascular Surgery of The First Affiliated Hospital, Soochow University, 188 Shizi Street, Suzhou, 215006, China.
authors: Xu
authors: X
authors: Wang
authors: Institute for Cardiovascular Science & Department of Cardiovascular Surgery of The First Affiliated Hospital, Soochow University, 188 Shizi Street, Suzhou, 215006, China.
authors: Ming
authors: M
authors: Chen
authors: Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215006, China.
authors: Bo
authors: B
authors: Song
authors: Division of Research Animal Laboratory and Translational Medicine, Research and Development Center, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka, 569-8686, Japan. masaii@osaka-med.ac.jp.
authors: Masaaki
authors: M
authors: Ii
authors: Institute for Cardiovascular Science & Department of Cardiovascular Surgery of The First Affiliated Hospital, Soochow University, 188 Shizi Street, Suzhou, 215006, China. uuzyshen@aliyun.com.
authors: Zhenya
authors: Z
authors: Shen
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000502:physiology*; D049109:Cell Proliferation / Q000502:physiology; D002478:Cells, Cultured; D015536:Down-Regulation / Q000502:physiology; D042783:Endothelial Cells / Q000378:metabolism / Q000473:pathology / Q000502:physiology; D066026:Endothelial Progenitor Cells / Q000378:metabolism* / Q000502:physiology*; D006614:Hindlimb / Q000378:metabolism / Q000473:pathology; D061307:Human Umbilical Vein Endothelial Cells; D006801:Humans; D007511:Ischemia / Q000378:metabolism / Q000473:pathology; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D009389:Neovascularization, Pathologic / Q000378:metabolism* / Q000473:pathology; D018919:Neovascularization, Physiologic / Q000502:physiology*; D009687:Nuclear Proteins / Q000378:metabolism*; D010750:Phosphoproteins / Q000378:metabolism*; D012039:Regional Blood Flow / Q000502:physiology
chemical_list: C489664:Ifi16 protein, mouse; D009687:Nuclear Proteins; D010750:Phosphoproteins
keywords: Endothelial differentiation; Endothelial progenitor cells; Hindlimb ischemia; Ifi204; Vasculogenesis