title: Correlation Between Daam2 Expression Changes and Demyelination in Guillain-Barre Syndrome.
abstract: Wnt signaling has been implicated in developmental and regenerative myelination of the CNS and PNS. The present translational investigation was undertaken to assess whether a soluble factor like Wnt may be responsible for the critically important skeletal muscle neuromuscular junction-Schwann cell communication. Specifically, three key aspects were examined: (a) whether the expression of Daam2, disheveled-associated activator of morphogenesis, a key Wnt signaling downstream effector, and PIP5K is changed in the demyelinating conditions and under different stages of progress of clinical recovery of patients with Guillain-Barre syndrome; (b) whether critical protein interactions of Daam2 with disheveled and Arf6 are changed; and (c) whether expression of c-Jun/Krox, a key negative regulator of remyelination, is changed. Daam2 was elevated in acute presentation in GB syndrome. Reduction occurred with clinical improvement of the patients. With progressive clinical improvement, c-Jun/Krox expression significantly reduced with time. Wnt signaling likely causes immediate early gene activation and transcriptional shutdown of factors critical for formation and maintenance of myelination. Whether the findings of the present study are specific to pathophysiology of demyelination in acute infectious polyradiculopathy and multiple sclerosis or a generalized aspect of demyelinating diseases merits to be examined in future studies.
authors: Department of Neurology, Hospital of Chongqing Armed Police Force, Chongqing, 404000, China.
authors: Quanquan
authors: Q
authors: Cui
authors: Chongqing University of Medical Science, No.1 Yixueyuan Road, Yuzhong District, Chongqing, 400016, China. Cd7476@gmail.com.
authors: Peng
authors: P
authors: Xie
mesh_terms: D000328:Adult; D000368:Aged; D002478:Cells, Cultured; D003711:Demyelinating Diseases / Q000378:metabolism* / Q000473:pathology; D005260:Female; D020275:Guillain-Barre Syndrome / Q000378:metabolism* / Q000473:pathology*; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins / Q000378:metabolism*; D008297:Male; D008840:Microfilament Proteins; D008875:Middle Aged; D009186:Myelin Sheath / Q000378:metabolism*; D012583:Schwann Cells / Q000166:cytology*; D015398:Signal Transduction / Q000502:physiology; D020741:rho GTP-Binding Proteins
chemical_list: C478654:DAAM2 protein, human; D047908:Intracellular Signaling Peptides and Proteins; D008840:Microfilament Proteins; D020741:rho GTP-Binding Proteins
keywords: Acute demyelinating polyneuropathy; Demyelination; Neuronal Wnt signaling; Remyelination; Transcriptional inhibition