Xem 1-6 trên 6 kết quả Neurotrophic signals
  • Prosaposin is a neurotrophic factor that has been demonstrated to mediate trophic signalling events in different cell types; it distributes to surface membranes of neural cells and also exists as a secreted protein in different body fluids. Prosaposin was demonstrated to form tightly bound complexes with a variety of gangliosides, and a functional role has been suggested for ganglioside–prosaposin complexes.

    pdf10p research12 29-04-2013 16 2   Download

  • The newestmember of themitogenactivatedprotein (MAP) kinase family of proteins, extracellular signal regulated kinase 5 (ERK5; also known as big-mitogen activated kinase 1 or BMK1) is widely expressed in many tissues including the brain. Although growth factor activation of ERK5 innon-neuronal cells has been shown to contribute to cell proliferation, differentiation and transformation, until recently no information was available on the role of ERK5 in neuronalsurvival.

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  • gp130 is the common signal transducing receptor subunit of interleukin (IL)-6-type cytokines. gp130 either homodimerizes in response to IL-6 and IL-11 or forms heterodimers with the leukemia inhibitory factor (LIF) receptor (LIFR) in response to LIF, oncostatin M (OSM), ciliary neurotrophic factor (CNTF), cardiotrophin-1 (CT-1) or cardiotrophinlike cytokine resulting in the onset of cytoplasmic tyrosine phosphorylation cascades. The extracellular parts of both gp130 and LIFR consist of several Ig-like and fibronectin type III-like domains.

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  • Neurodegenerative disorders are common and devastating. Rationally, the most effective treatments will target pathogenetic mechanisms. While alternative approaches, based on alleviating the symptoms of patients with Alzheimer disease, Parkinson disease, Huntington disease, prion disorders or amyotrophic lateral sclerosis, can be expected to reduce suffering, studies of pathogenesis of these agerelated disorderswill be most important for enabling early diagnosis and the creation of preventative and curative treatments.

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  • Ligand-induced oligomerization of receptors is a key step in initiating growth factor signaling. Nevertheless, complex biological responses often require additionaltrans-signaling mechanisms involving two or more signaling cascades. For cells of neuronal origin, it was shown that neurotrophic effects evoked by nerve growth factor or other neurotro-phins dependhighlyon the cooperativitywith cytokines that belong to the transforming growth factor b (TGF-b) superfamily.

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  • Glial cell line-derived neurotrophic factor family ligands act through the receptor tyrosine kinase Ret, which plays important roles during embryonic development for cell differentiation, survival, and migration. Ret signaling is markedly affected by compartmentalization of receptor complexes into membrane subdomains.

    pdf12p media19 06-03-2013 10 1   Download

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