کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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3257252 | 1207402 | 2011 | 11 صفحه PDF | دانلود رایگان |
We have studied the effect of intravenous immunoglobulins (IVIG) on monocyte subpopulations and cytokine production in patients with CVID. The absolute number of CD14+CD16++ monocytes decreased on average 2.5-fold 4 h after IVIG and after 20 h returned to the baseline. The cytokine level in the supernatants of peripheral blood mononuclear cells (PBMC) after ex vivo LPS stimulation demonstrated the > 2-fold decrease in TNF production 4 h after IVIG. The TNF expression, which is higher in the CD14+CD16++ monocytes, was decreased in these cells by IVIG in 4/7 CVID cases. In vitro exposure of the healthy individuals' monocytes to the IVIG preparation resulted in reduced TNF production, which was overcome by blockade of the FcγRIIB in the CD14+CD16++ CD32Bhigh monocytes. Our data suggest that reduction in the number of CD14+CD16++ monocytes and the blockade of their cytokine production via triggering CD32B can contribute to the anti-inflammatory action of IVIG.
Journal: Clinical Immunology - Volume 139, Issue 2, May 2011, Pages 122–132