title: Partial hepatectomy induces mobilization of a unique population of haematopoietic progenitor cells in human healthy liver donors.
abstract: OBJECTIVE
  Recent studies indicate that after transplantation, circulating bone marrow-derived stem cells migrate into the liver and contribute to liver regeneration. Whether such cells are actively recruited from the bone marrow for liver repair remains to be determined. In this regard, we investigated whether liver resection leads to a release of stem cell marker-positive (+) cells into the peripheral circulation.
  
  
  METHODS
  Peripheral blood samples from 11 living liver donors were analyzed by flow cytometry one day before and 12h after partial hepatectomy (PH) using antibodies against CD133, CD34, CD45, CD14, c-kit, bcrp-1. Immunomagnetic separation was performed to select CD133+ cells for functional assays in vitro.
  
  
  RESULTS
  A significant increase in the percentage of CD133+ cells could be demonstrated in all donors studied. Unexpectedly, virtually all CD133+ cells coexpressed CD45 and CD14, whereas only a small subset expressed CD34. No significant staining was observed for c-kit and bcrp-1. In culture, immunoselected CD133+ cells displayed characteristics of myelomonocytic precursors. In addition, enriched CD133+ generated an adherent cell population that expressed CK8, alpha-fetoprotein, and human albumin.
  
  
  CONCLUSIONS
  PH induces mobilization of a distinct population of myelomonocytic progenitor cells, which have hepatic differentiation potential in vitro, and might play a role in liver regeneration after PH in humans.
authors.affiliation: Department of Hepatobiliary Surgery and Visceral Transplantation, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany. gehling@uke.uni-hamburg.de
authors.forename: Ursula M
authors.initials: UM
authors.lastname: Gehling
authors.forename: Marc
authors.initials: M
authors.lastname: Willems
authors.forename: Maura
authors.initials: M
authors.lastname: Dandri
authors.forename: Jörg
authors.initials: J
authors.lastname: Petersen
authors.forename: Marc
authors.initials: M
authors.lastname: Berna
authors.forename: Michelle
authors.initials: M
authors.lastname: Thill
authors.forename: Tina
authors.initials: T
authors.lastname: Wulf
authors.forename: Lars
authors.initials: L
authors.lastname: Müller
authors.forename: Joerg M
authors.initials: JM
authors.lastname: Pollok
authors.forename: Kathleen
authors.initials: K
authors.lastname: Schlagner
authors.forename: Christiane
authors.initials: C
authors.lastname: Faltz
authors.forename: Dieter K
authors.initials: DK
authors.lastname: Hossfeld
authors.forename: Xavier
authors.initials: X
authors.lastname: Rogiers
mesh_terms: D015703:Antigens, CD / Q000235:genetics / Q000378:metabolism; D015415:Biomarkers / Q000378:metabolism; D002454:Cell Differentiation; D048430:Cell Shape; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000502:physiology*; D006498:Hepatectomy; D022781:Hepatocytes / Q000166:cytology; D006801:Humans; D018189:Immunomagnetic Separation; D008115:Liver Regeneration; D016031:Liver Transplantation; D019520:Living Donors
chemical_list: D015703:Antigens, CD; D015415:Biomarkers