The long term objective of Project V is to understand the biochemical events which direct the synthesis and deposition of myelin membranes in the CNS. Our basic hypothesis is that specific cell surface proteins are present on axonal membranes that participate in oligodendrocyte recognition, regulated membrane synthesis and the ordered wrapping and compaction of myelin membranes. We propose three different approaches toward identifying these proteins and elucidating their functional properties. The first approach is an extension of our previous studies which indicate that a specific oligodendrocyte adhesion receptor, a member of the integrin receptor family, may participate in the regulation of myelin gene expression. We plan to purify this receptor and clone the cDNA which encodes it. Antibodies against the receptor will be used to probe it's role in oligodendrocyte adhesion and myelin synthesis. The second section of this proposal is also directed at oligodendrocyte adhesion but here the emphasis is on the extracellular matrix component (ECM), produced by glial cells, which is recognized by oligodendrocytes in vitro. We plan to purify and characterize this component and determine if it is a previously recognized ECM protein. Antibodies directed against this protein will be used to determine its pattern of expression in developing brain. Our third plan of research includes two direct approaches toward the identification and purification of the axonal proteins which we propose to be involved in the process of myelin membrane wrapping. An in vitro myelination system will be used to screen a battery of anti-axonal membrane monoclonal antibodies for their ability to cause a specific disruption of oligodendrocyte-axon interactions and thus allow us to identify functional components of the machinery responsible for myelinogenesis. In addition to this immunological approach, we will carry out a more traditional biochemical search utilizing a bioassay for purification of these important axolemmal constituents.

Project Start
Project End
Budget Start
Budget End
Support Year
22
Fiscal Year
1995
Total Cost
Indirect Cost
Name
University of California Los Angeles
Department
Type
DUNS #
119132785
City
Los Angeles
State
CA
Country
United States
Zip Code
90095
Krityakiarana, Warin; Zhao, Paul M; Nguyen, Kevin et al. (2016) Proof-of Concept that an Acute Trophic Factors Intervention After Spinal Cord Injury Provides an Adequate Niche for Neuroprotection, Recruitment of Nestin-Expressing Progenitors and Regeneration. Neurochem Res 41:431-49
Espinosa-Jeffrey, Araceli; Blanchi, Bruno; Biancotti, Juan Carlos et al. (2016) Efficient Generation of Viral and Integration-Free Human Induced Pluripotent Stem Cell-Derived Oligodendrocytes. Curr Protoc Stem Cell Biol 38:2D.18.1-2D.18.27
Abad, Catalina; Cheung-Lau, Gardenia; Coûté-Monvoisin, Anne-Claire et al. (2015) Vasoactive intestinal peptide-deficient mice exhibit reduced pathology in trinitrobenzene sulfonic acid-induced colitis. Neuroimmunomodulation 22:203-12
Tsoa, Rosemarie W; Coskun, Volkan; Ho, Chi K et al. (2014) Spatiotemporally different origins of NG2 progenitors produce cortical interneurons versus glia in the mammalian forebrain. Proc Natl Acad Sci U S A 111:7444-9
Espinosa-Jeffrey, Araceli; Barajas, Socorro A R; Arrazola, Alfonso R et al. (2013) White matter loss in a mouse model of periventricular leukomalacia is rescued by trophic factors. Brain Sci 3:1461-82
Xue, Zhigang; Huang, Kevin; Cai, Chaochao et al. (2013) Genetic programs in human and mouse early embryos revealed by single-cell RNA sequencing. Nature 500:593-7
Yan, Yan; Zhou, Xiaofeng; Pan, Zui et al. (2013) Pro- and anti-mitogenic actions of pituitary adenylate cyclase-activating polypeptide in developing cerebral cortex: potential mediation by developmental switch of PAC1 receptor mRNA isoforms. J Neurosci 33:3865-78
de Vellis, Jean; Cole, Ruth (2012) Preparation of mixed glial cultures from postnatal rat brain. Methods Mol Biol 814:49-59
Ghiani, Cristina A; Mattan, Natalia S; Nobuta, Hiroko et al. (2011) Early effects of lipopolysaccharide-induced inflammation on foetal brain development in rat. ASN Neuro 3:
Hirose, Megumi; Niewiadomski, Pawel; Tse, Gary et al. (2011) Pituitary adenylyl cyclase-activating peptide counteracts hedgehog-dependent motor neuron production in mouse embryonic stem cell cultures. J Neurosci Res 89:1363-74

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