title: Liposome-mediated transfection with extract from neonatal rat cardiomyocytes induces transdifferentiation of human adipose-derived stem cells into cardiomyocytes.
abstract: OBJECTIVE
  Recent studies indicate that direct cell-to-cell interaction is involved in transdifferentiation of adult stem cells into cardiomyocytes. We investigated whether transdifferentiation of human adipose-tissue-derived stem cells could be achieved by transfecting the cells with a nuclear neonatal cardiomyocyte extract using a liposome-based transfection system.
  
  
  METHODS
  In this study, we isolated stem cells derived from human subcutaneous adipose tissue. These cells were transfected with nuclear protein extracts from either isolated cardiomyocytes or whole hearts of neonatal rats. Results. We found that transfection induced expression of the cardiac markers alpha-sarcomeric actin, Nkx2.5, troponin I and troponin T after 1-3 weeks. Whole-heart protein extracts showed the additional capacity to induce differentiation into endothelial-like and smooth muscle-like cells.
  
  
  CONCLUSIONS
  We demonstrate that transfection with nuclear protein extracts from neonatal rat cardiomyocytes can induce a cardiomyogenic differentiation pathway in human stem cells.
authors.affiliation: Department of Molecular Pathology, University of Texas, M D Anderson Cancer Center, Houston, Texas 77054, USA.
authors.forename: Kirstin
authors.initials: K
authors.lastname: Schimrosczyk
authors.forename: Yao-Hua
authors.initials: YH
authors.lastname: Song
authors.forename: Jody
authors.initials: J
authors.lastname: Vykoukal
authors.forename: Daynene
authors.initials: D
authors.lastname: Vykoukal
authors.forename: Xiaowen
authors.initials: X
authors.lastname: Bai
authors.forename: Michael
authors.initials: M
authors.lastname: Coleman
authors.forename: Alexander
authors.initials: A
authors.lastname: Krohn
authors.forename: Susanne
authors.initials: S
authors.lastname: Freyberg
authors.forename: Eckhard U
authors.initials: EU
authors.lastname: Alt
mesh_terms: D017667:Adipocytes / Q000166:cytology / Q000378:metabolism*; D000818:Animals; D000831:Animals, Newborn; D002454:Cell Differentiation; D019070:Cell Lineage; D054338:Cell Transdifferentiation; D002478:Cells, Cultured; D042783:Endothelial Cells / Q000378:metabolism; D005786:Gene Expression Regulation; D006801:Humans; D008081:Liposomes; D032383:Myocytes, Cardiac / Q000166:cytology / Q000378:metabolism*; D011506:Proteins / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics; D051381:Rats; D013234:Stem Cells / Q000166:cytology / Q000378:metabolism*; D014162:Transfection / Q000379:methods*; D019076:Transgenes / Q000235:genetics*
chemical_list: D008081:Liposomes; D011506:Proteins; D012333:RNA, Messenger