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Single-dose Intravenous Gammaglobulin Can Stabilize Neutrophil Mac-1 Activation in Sickle Cell Pain Crisis

Overview
Journal Am J Hematol
Specialty Hematology
Date 2015 Jan 24
PMID 25616042
Citations 22
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Abstract

Intravenous immunoglobulin (IVIG) decreases neutrophil adhesion to endothelium and red blood cell-neutrophil interactions in sickle cell mice undergoing vaso-occlusion. In this Phase I clinical trial of sickle cell anemia (SCA) patients admitted with pain crisis, we evaluated the status of adhesion molecules on neutrophils in control and IVIG-treated subjects pre- and post-infusion up to 800 mg/kg, the same dose used in murine studies. Mac-1 function significantly decreased from baseline in the low-dose IVIG (200-400 mg/kg) cohorts. IVIG-related adverse events may have occurred in the high-dose (600-800 mg/kg) cohorts. There were no significant increases in neutrophil and leukocyte counts, suggesting that IVIG may more selectively inhibit Mac-1 function as opposed to neutrophil adhesion. This study provides the first in-human validation of pre-clinical murine studies that IVIG can decrease Mac-1 function.

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