title: Differential bone marrow hematopoietic stem cells mobilization in hepatectomized patients.
abstract: BACKGROUND
  The involvement of bone marrow hematopoietic stem cells (BMHSC) mobilization during liver regeneration from hepatectomized patients is under debate. The main aim of this study was to investigate the role of BMHSC mobilization after hepatic resection in 33 patients with liver disease.
  
  
  RESULTS
  Mobilization of CD34(+) BMHSC after 72 h of surgery was found in peripheral blood of some, but not all, of the hepatectomized patients. These CD34(+) cells co-expressed other stem cells markers. The patients without BMHSC mobilization showed high levels of circulating and liver tissue BMHSC (CD34(+) cells) previous to surgery. Therefore, two types of patients: "mobilizers" and "non-mobilizers" were distinguished based on the values of CD34(+) cells before and after surgery. Changes in cytokines involved in the hepatic regeneration (HGF and TGF-β), and in BMHSC mobilization process (SCF, SDF-1, IL-12, or MMP-2), were detected in both groups. In addition, a higher activation previous to surgery of the SDF-1/CXCR4 axis in liver tissue was observed in non mobilizers patients compared to mobilizer patients.
  
  
  CONCLUSIONS
  BMHSC mobilization seems to be associated with variations in the levels of cytokines and proteolytic enzymes involved in hepatic regeneration and bone marrow matrix degradation. Hepatectomy may be an insufficient stimulus for BMSHC mobilization. The pre-hepatectomy higher levels CD34(+) cells in peripheral blood and liver, associated to the activation of hepatic SDF-1/CXCR4 axis, suggest a BMHSC mobilization process previous to surgery in non mobilizer patients.
authors.affiliation: Instituto Maimónides de Investigación Biomédica de Córdoba, (IMIBIC), Hospital Universitario Reina Sofía, Córdoba, Spain.
authors.forename: Carmen
authors.initials: C
authors.lastname: Herencia
authors.forename: Antonio
authors.initials: A
authors.lastname: Rodríguez-Ariza
authors.forename: Antonio
authors.initials: A
authors.lastname: Canalejo
authors.forename: Alvaro
authors.initials: A
authors.lastname: Naranjo
authors.forename: F Javier
authors.initials: FJ
authors.lastname: Briceño
authors.forename: Pedro
authors.initials: P
authors.lastname: López-Cillero
authors.forename: Manuel
authors.initials: M
authors.lastname: De la Mata
authors.forename: Juan R
authors.initials: JR
authors.lastname: Muñoz-Castañeda
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D018952:Antigens, CD34 / Q000378:metabolism*; D054377:Chemokine CXCL12 / Q000097:blood; D005260:Female; D019650:Hematopoietic Stem Cell Mobilization; D006412:Hematopoietic Stem Cells / Q000378:metabolism* / Q000502:physiology; D006498:Hepatectomy; D017228:Hepatocyte Growth Factor / Q000097:blood; D006801:Humans; D018664:Interleukin-12 / Q000097:blood; D019394:Ki-67 Antigen / Q000378:metabolism; D008099:Liver / Q000378:metabolism / Q000473:pathology / Q000601:surgery; D008115:Liver Regeneration / Q000502:physiology*; D008297:Male; D020778:Matrix Metalloproteinase 2 / Q000097:blood; D008875:Middle Aged; D019718:Receptors, CXCR4 / Q000097:blood; D015398:Signal Transduction / Q000502:physiology*; D019089:Stem Cell Factor / Q000097:blood; D016212:Transforming Growth Factor beta / Q000097:blood
chemical_list: D018952:Antigens, CD34; D054377:Chemokine CXCL12; C066855:HGF protein, human; D019394:Ki-67 Antigen; D019718:Receptors, CXCR4; D019089:Stem Cell Factor; D016212:Transforming Growth Factor beta; D018664:Interleukin-12; D017228:Hepatocyte Growth Factor; D020778:Matrix Metalloproteinase 2