Bone morphogenic proteins (BMPs) signaling blockade induce neurogenesis and oligodendrogenesis. Differential screening-selected gene aberrative in neuroblastoma (DAN) is a glycoprotein that antagonizes BMPs. We found that DAN levels were higher in CSF compared to serum in all participants. CSF-DAN levels were elevated in RR-and progresssive MS patients compared to controls. Moreover, serum-DAN levels were reduced in those patients, but elevated in IFN-β1a treated patients. The main source of DAN is apparently CNS- resident cells. The enhanced levels of CSF-DAN in MS patients suggest a tendency to induce neurogenesis/oligodendrogenesis in the patients CNS. Our results suggest an unreported mode of action of IFN-β1a.
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The DAN gene family (DAN, Differential screening-selected gene Aberrant in Neuroblastoma) is a group of genes that is expressed during development and plays fundamental roles in limb bud formation and digitation, kidney formation and morphogenesis and left-right axis specification. During adulthood the expression of these genes are associated with diseases, including cancer. Although most of the attention to this group of genes has been dedicated to understanding its role in physiology and development, its evolutionary history remains poorly understood.
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Department of Paediatrics and Adolescent Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Kerpener Str. 62, 50937 Cologne, Germany.
Bone morphogenic proteins (BMPs) are important growth regulators in embryogenesis and postnatal homeostasis. Their tight regulation is crucial for successful embryonic development as well as tissue homeostasis in the adult organism. BMP inhibition by natural extracellular biologic antagonists represents the most intensively studied mechanistic concept of BMP growth factor regulation.
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The DAN (differential screening-selected gene aberrative in neuroblastoma) family are a group of secreted extracellular proteins which typically bind to and antagonize BMP (bone morphogenetic protein) ligands. Previous studies have revealed discrepancies between the oligomerization state of certain DAN family members, with SOST (a poor antagonist of BMP signaling) forming a monomer while Grem1, Grem2, and NBL1 (more potent BMP antagonists) form non-disulfide linked dimers. The protein SOSTDC1 (Sclerostin domain containing protein 1) is sequentially similar to SOST, but has been shown to be a better BMP inhibitor.
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