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J Clin Oncol. 2012 Feb 1;30(4):426-32. doi: 10.1200/JCO.2011.37.6236. Epub 2011 Dec 27.

Activation of peripheral-blood granulocytes is strongly correlated with patient outcome after immunotherapy with anti-GD2 monoclonal antibody and granulocyte-macrophage colony-stimulating factor.

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  • 1Memorial Sloan-Kettering Cancer Center, 1275 York Ave, New York, NY 10065, USA. cheungi@mskcc.org

Abstract

PURPOSE:

Adjuvant therapy using anti-GD2 monoclonal antibody and granulocyte-macrophage colony-stimulating factor (GM-CSF) has shown treatment success for patients with high-risk neuroblastoma (NB). Although there is ample evidence on how the antibody targets NB, in vivo contribution by GM-CSF remains unclear. This report investigates granulocyte activation and its correlation with treatment outcome.

PATIENTS AND METHODS:

Patients enrolled onto NCT00072358 received multiple treatment cycles, each consisting of anti-GD2 antibody 3F8 plus subcutaneous (SC) GM-CSF. Peripheral-blood (PB) samples from 151 patients were collected on day 0 and day 4 of cycle 1. PB from a subgroup of 35 patients had intravenous (IV) instead of SC GM-CSF during cycle 4. Samples were analyzed by flow cytometry for CD11a, CD63, CD87, and CD11b and its activation epitope CBRM1/5.

RESULTS:

Comparing cycle 1 day 4 PB samples with day 0 PB samples, five of five activation marker-positive granulocytes were significantly higher. The change in frequency and mean fluorescence intensity of CBRM1/5-positive granulocytes correlated with progression-free survival (PFS; P = .024 and P = .008, respectively). A multivariable analysis identified increasing CBRM1/5-positive granulocytes and missing killer immunoglobulin-like receptor ligand as positive independent prognostic factors for PFS, whereas second-line cyclophosphamide-based therapy before protocol entry negatively influenced outcome. Thirty-five patients who received SC GM-CSF at cycle 1 and IV GM-CSF at cycle 4 had significantly less CBRM1/5 activation after IV GM-CSF. In contrast, 63 patients who received SC GM-CSF at both cycles had comparable CBRM1/5 activation.

CONCLUSION:

GM-CSF-induced granulocyte activation in vivo is associated with improved patient outcome. This activation was more apparent when GM-CSF was given by the SC route instead of IV route.

PMID:
22203761
[PubMed - indexed for MEDLINE]
PMCID:
PMC3269968
Free PMC Article
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