PMID- 22670776 OWN - NLM STAT- MEDLINE DCOM- 20120820 LR - 20211021 IS - 1365-2249 (Electronic) IS - 0009-9104 (Print) IS - 0009-9104 (Linking) VI - 169 IP - 1 DP - 2012 Jul TI - Intravenous immunoglobulin does not increase FcgammaRIIB expression levels on monocytes in children with immune thrombocytopenia. PG - 33-7 LID - 10.1111/j.1365-2249.2012.04591.x [doi] AB - Intravenous immunoglobulin (IVIG) produces a rapid and prolonged increase in the platelet counts of children with immune thrombocytopenia (ITP). The mechanism of IVIG efficacy in a murine model of ITP has been reported to operate through an IVIG-mediated increase in the expression of the inhibitory Fc receptor FcgammaRIIB(CD32B) on splenic macrophages. This investigation examined whether IVIG administration results in a similar increase in FcgammaRIIB expression on peripheral blood CD14(+) monocytes in 20 children with ITP. FcgammaRIIB expression on peripheral blood monocytes was measured by flow cytometry in ITP patients, before and after IVIG therapy, as well as in control subjects. Peripheral blood monocytes were labelled with fluorescent-specific antibodies. There were no significant differences in the absolute number of [corrected] CD14(+) CD32B(+) monocytes, and [corrected] the percentages of CD14(+) CD32B(+) cells in mononuclear cells or monocytes. [corrected]. We suggest that IVIG does not increase FcgammaRIIB expression in peripheral blood monocytes in children with ITP. CI - (c) 2012 The Authors. Clinical and Experimental Immunology (c) 2012 British Society for Immunology. FAU - Shimomura, M AU - Shimomura M AD - Department of Pediatrics, Yamaguchi University Graduate School of Medicine, Ube, Japan. r004um@yamaguchi-u.ac.jp FAU - Hasegawa, S AU - Hasegawa S FAU - Seki, Y AU - Seki Y FAU - Fukano, R AU - Fukano R FAU - Hotta, N AU - Hotta N FAU - Ichiyama, T AU - Ichiyama T LA - eng PT - Journal Article PL - England TA - Clin Exp Immunol JT - Clinical and experimental immunology JID - 0057202 RN - 0 (FCGR3B protein, human) RN - 0 (Fc gamma receptor IIB) RN - 0 (GPI-Linked Proteins) RN - 0 (Immunoglobulins, Intravenous) RN - 0 (Lipopolysaccharide Receptors) RN - 0 (Receptors, IgG) SB - IM EIN - Clin Exp Immunol. 2014 Aug;177(2):554 MH - Acute Disease MH - Animals MH - Case-Control Studies MH - Child MH - Child, Preschool MH - Female MH - Flow Cytometry MH - GPI-Linked Proteins/blood/immunology MH - Humans MH - Immunoglobulins, Intravenous/*administration & dosage MH - Infant MH - Lipopolysaccharide Receptors/blood/immunology MH - Macrophages/immunology MH - Male MH - Mice MH - Monocytes/*immunology MH - Platelet Count MH - Receptors, IgG/biosynthesis/*blood/immunology MH - Thrombocytopenia/*immunology PMC - PMC3390471 EDAT- 2012/06/08 06:00 MHDA- 2012/08/21 06:00 PMCR- 2013/07/01 CRDT- 2012/06/08 06:00 PHST- 2012/06/08 06:00 [entrez] PHST- 2012/06/08 06:00 [pubmed] PHST- 2012/08/21 06:00 [medline] PHST- 2013/07/01 00:00 [pmc-release] AID - 10.1111/j.1365-2249.2012.04591.x [doi] PST - ppublish SO - Clin Exp Immunol. 2012 Jul;169(1):33-7. doi: 10.1111/j.1365-2249.2012.04591.x.