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Liver surgery induces an immediate mobilization of progenitor cells in liver cancer patients: A potential role for G-CSF. | LitMetric

AI Article Synopsis

Article Abstract

Background: In preclinical models recruitment of bone-marrow derived (endothelial) progenitor cells (BD(E)PCs) contributes to tumor growth and metastasis formation. Here we investigated whether these (E)PCs and mobilizing cytokines are released after partial hepatectomy or radiofrequency ablation (RFA) for liver tumors. In addition, we tested whether G-CSF could play a role in EPC mobilization in mice and in human volunteers.

Results: Patients undergoing partial hepatectomy or RFA showed an instantaneous release of EPCs following laparotomy and mobilization of the liver. Elevated EPC levels were maintained during the entire procedure, but dropped to near-baseline levels 4 h after completion of the procedure. Plasma G-CSF levels showed a 5-10-fold increase after the procedure and low-dose G-CSF administration to mice or healthy volunteers was sufficient to induce an immediate release of EPCs. Surgery also caused an increase in the plasma levels of VEGF, but not SDF-1alpha.

Methods: Before, during and after liver surgery plasma and mononuclear cells were collected from 12 patients undergoing partial hepatectomy or RFA. To explore the role of G-CSF C57Bl/6 mice and 20 human volunteers received G-CSF (0.3, 3 or 300microg). In all individuals, (E)PC numbers were determined by flow cytometry at predefined timepoints shortly after therapy. Plasma levels of G-CSF, VEGF and SDF-1alpha were measured by ELISA.

Conclusion: Compliant with previous published data concerning VDA and chemotherapy treatment, liver surgery induces an instantaneous release of EPCs, conceivably in response to elevated G-CSF levels. This suggests the value of exploring therapeutic avenues to prevent this process.

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Source
http://dx.doi.org/10.4161/cbt.9.9.11551DOI Listing

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