Anti-CNTF monoclonal antibody, clone 45849

The fouling of neurotransmitter during electrochemical detection can dramatically jeopardize the viability of the sensor. Several recent developments in electrode fabrication and design have helped mitigating this issue. For instance, carbon nanotube fiber (CNTF) electrodes were found to be more resistant to fouling than the traditional carbon fiber (CF) electrodes. Here, we investigate the fouling resistance of these two materials in the presence of albumin. Interestingly, our data shows that the presence of albumin reduces the impact of dopamine (DA) fouling in a dose-dependent manner. A protective effect from DA fouling was also observed for other thiol containing substances, thus hinting that the sulfur competes with the amine moiety for the nucleophilic binding to the oxidized catechol, a critical step initiating DA fouling, and therefore reduces the rate of DA polymerization on the electrode surface. Overall, this study furthers our understanding of the mechanisms controlling DA detection in situ, and suggests using solutions of albumin as a background for calibrating sensors. (C) 2016 Elsevier Ltd. All rights reserved.

The transition of differentiated Schwann cells to support of nerve repair after injury is accompanied by remodeling of the Schwann cell epigenome. The EED-containing polycomb repressive complex 2 (PRC2) catalyzes histone H3K27 methylation and represses key nerve repair genes such as Shh, Gdnf, and Bdnf, and their activation is accompanied by loss of H3K27 methylation. Analysis of nerve injury in mice with a Schwann cell-specific loss of EED showed the reversal of polycomb repression is required and a rate limiting step in the increased transcription of Neuregulin 1 (type I), which is required for efficient remyelination. However, mouse nerves with EED-deficient Schwann cells display slow axonal regeneration with significantly low expression of axon guidance genes, including Sema4f and Cntf. Finally, EED loss causes impaired Schwann cell proliferation after injury with significant induction of the Cdkn2a cell cycle inhibitor gene. Interestingly, PRC2 subunits and CDKN2A are commonly co-mutated in the transition from benign neurofibromas to malignant peripheral nerve sheath tumors (MPNST's). RNA-seq analysis of EED-deficient mice identified PRC2-regulated molecular pathways that may contribute to the transition to malignancy in neurofibromatosis.