title: Monitoring transplanted adipose tissue-derived stem cells combined with heparin in the liver by fluorescence imaging using quantum dots.
abstract: Adipose tissue-derived stem cell (ASC) transplantation, when used in combination with heparin, has proven to be an effective treatment for acute liver failure in mice. However, the behavior and organ-specific accumulation of transplanted ASCs alone or in combination with heparin is poorly understood. In this paper, we investigated whether quantum dots (QDs) labeling using octa-arginine peptide (R8) for ASCs could be applied for in vivo fluorescence imaging in mice with acute liver failure, and analyzed the behavior and organ-specific accumulation of ASCs that were transplanted alone or in combination with heparin using an IVIS(®) Spectrum analysis. Almost all of the transplanted ASCs were observed to accumulate in the lungs within 10 min without heparin. However, when heparin was used in combination with the ASCs, the accumulation of the transplanted ASCs was found not only in the lungs but also in the liver. The region of interest (ROI) analysis of ex vivo fluorescence imaging showed that the accumulation rate of transplanted ASCs in the liver increased to about 30%. In the time course analysis, the accumulation rate of ASCs in the liver was about 10% in 1 day and was maintained at that level for at least 2 day. We observed that heparin was effective for increasing the accumulation of transplanted ASCs in the liver using fluorescence imaging technology. We suggest that fluorescence imaging by means of QDs labeling using R8 can be useful for tracing the transplanted cells.
authors.affiliation: Department of Advanced Medicine in Biotechnology and Robotics, Graduate School of Medicine, Nagoya University, Nagoya 461-0047, Japan. hiroshiy@med.nagoya-u.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yukawa
authors.forename: Masaki
authors.initials: M
authors.lastname: Watanabe
authors.forename: Noritada
authors.initials: N
authors.lastname: Kaji
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Okamoto
authors.forename: Manabu
authors.initials: M
authors.lastname: Tokeshi
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Miyamoto
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Noguchi
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Baba
authors.forename: Shuji
authors.initials: S
authors.lastname: Hayashi
mesh_terms: D000273:Adipose Tissue / Q000166:cytology*; D000818:Animals; D016207:Cytokines / Q000378:metabolism; D005453:Fluorescence; D006493:Heparin / Q000378:metabolism* / Q000627:therapeutic use; D008099:Liver / Q000166:cytology* / Q000378:metabolism*; D017114:Liver Failure, Acute / Q000601:surgery; D051379:Mice; D008810:Mice, Inbred C57BL; D009842:Oligopeptides / Q000378:metabolism / Q000627:therapeutic use; D045663:Quantum Dots; D033581:Stem Cell Transplantation / Q000379:methods*; D013234:Stem Cells / Q000166:cytology / Q000502:physiology*; D014018:Tissue Distribution
chemical_list: D016207:Cytokines; D009842:Oligopeptides; C500307:octa-arginine peptide; D006493:Heparin