Abstract
Activity-dependent neuroprotector (ADNP) is a neuroprotective molecule containing an 8-amino acid peptide, NAPVSIPQ (NAP), that is sufficient for its neuroprotective effects. To assess the expression of ADNP in the human immune system in normal subjects and multiple sclerosis patients. MaterialsandMethods: ADNP expression was assessed in peripheral blood mononuclear cells (PBMCs) from healthy donors and multiple sclerosis (MS) patients using staining with anti-ADNP (NAP) antibodies and markers for T cells, B cells, monocytes and natural killer cells. ADNP mRNA was determined in peripheral blood from MS patients (n = 24) and matched controls (n = 21). Expression of activation markers CD69 and CD154 and of IFN-gamma was assessed by flow cytometry in stimulated PBMCs. Effects of NAP on immune cell proliferation was assessed by tritiated thymidine incorporation. Monocytes, B cells and T cells, but not regulatory (CD4+CD25+) T cells expressed ADNP. NAP peptide decreased the expression of CD69, CD154 and IFN-gamma in PBMC and caused suppressed anti-CD3-/anti-CD28-stimulated PBMC proliferation. ADNP mRNA was reduced in MS compared to control peripheral blood. ADNP is expressed in many immune system cells. ADNP mRNA is reduced in PBMCs...Continue Reading
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