• Login
    View Item 
    •   Home
    • Theses and Dissertations
    • Theses and Dissertations
    • View Item
    •   Home
    • Theses and Dissertations
    • Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of TUScholarShareCommunitiesDateAuthorsTitlesSubjectsGenresThis CollectionDateAuthorsTitlesSubjectsGenres

    My Account

    LoginRegister

    Help

    AboutPeoplePoliciesHelp for DepositorsData DepositFAQs

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    NERVE GROWTH FACTOR INDUCES MITOCHONDRIAL FISSION THAT IS REQUIRED FOR AXON BRANCHING

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    TETDEDXArmijoWeingart-temple-0 ...
    Size:
    3.496Mb
    Format:
    PDF
    Download
    Genre
    Thesis/Dissertation
    Date
    2019
    Author
    Armijo Weingart, Lorena Armijo
    Advisor
    Gallo, Gianluca
    Committee member
    Smith, George M.
    Kim, Seonhee
    Li, Shuxin
    Ma, Le
    Department
    Neuroscience
    Subject
    Cellular Biology
    Branch
    Mitochondria
    Nerve Growth Factor
    Neurotrophins
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/2559
    
    Metadata
    Show full item record
    DOI
    http://dx.doi.org/10.34944/dspace/2541
    Abstract
    The formation of axon collateral branches from the pre-existing shafts of axons is an important aspect of neurodevelopment and the response of the nervous system to injury. Both the actin filament and microtubule components of the cytoskeleton are required for the formation of axon branches. Recent work has begun to shed light on how these two elements of the cytoskeleton are integrated by proteins that functionally or physically link the cytoskeleton. While a number of signaling pathways have been determined as having a role in the formation of axon branches, the complexity of the downstream mechanisms and links to specific signaling pathways remain to be fully determined. Neurotrophins are growth factors that have a multitude of roles in the nervous system. In sensory neurons nerve growth factor (NGF) induces branching through activation of phosphoinositide 3-kinase (PI3K). Recently, mitochondria have emerged as major determinants of the sites of axon branching. In this work we reveal a new role of neurotrophins in mitochondria fission. We report that NGF promote a rapid burst of mitochondria fission, followed by a new steady state of mitochondria length and density. Mek- Erk and PI3k pathways are required for NGF-induced fission. Mek-Erk controls fission through Drp1 activation, while we suggest that PI3K may contributes to the actin dependent aspect of fission. Drp1 mediated fission is required for NGF- induced branching in sensory neurons in vitro and the branching of sensory axons along the developing spinal cord. We reveal that fission is also required for the intra-axonal translation of the actin regulatory proteins Cortactin and Arp2 subunit from the Arp2/3 complex, an important aspect of NGF induced branching. Collectively, these observations reveal a novel role of neurotrophins in mitochondria fission and the formation of collateral branching
    ADA compliance
    For Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
    Collections
    Theses and Dissertations

    entitlement

     
    DSpace software (copyright © 2002 - 2023)  DuraSpace
    Temple University Libraries | 1900 N. 13th Street | Philadelphia, PA 19122
    (215) 204-8212 | scholarshare@temple.edu
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.