Shared more. Cited more. Safe forever.
    • advanced search
    • submit works
    • about
    • help
    • contact us
    • login
    View Item 
    •   MOspace Home
    • University of Missouri-Columbia
    • Office of Undergraduate Research (MU)
    • Undergraduate Research and Creative Achievements Forum (MU)
    • 2006 Summer Undergraduate Research and Creative Achievements Forum (MU)
    • View Item
    •   MOspace Home
    • University of Missouri-Columbia
    • Office of Undergraduate Research (MU)
    • Undergraduate Research and Creative Achievements Forum (MU)
    • 2006 Summer Undergraduate Research and Creative Achievements Forum (MU)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.
    advanced searchsubmit worksabouthelpcontact us

    Browse

    All of MOspaceCommunities & CollectionsDate IssuedAuthor/ContributorTitleIdentifierThesis DepartmentThesis AdvisorThesis SemesterThis CollectionDate IssuedAuthor/ContributorTitleIdentifierThesis DepartmentThesis AdvisorThesis Semester

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular AuthorsStatistics by Referrer

    The role of TGF-β in the development of thyrocyte hyperplasia in NOD.H2h4 mice [abstract]

    Mullen, Helen
    Duren, Alicia
    Yu, Shiguang
    View/Open
    [PDF] The role of TGF- in the development of thyrocyte.pdf (15.31Kb)
    Date
    2006
    Contributor
    University of Missouri-Columbia. Office of Undergraduate Research
    Format
    Abstract
    Metadata
    [+] Show full item record
    Abstract
    Wild type (WT) NOD.H-2h4 mice develop lymphocytic spontaneous autoimmune thyroiditis (L-SAT) and IFN-γ-/- NOD.H-2h4 mice develop severe thyroid epithelial cell (TEC) hyperplasia when given 0.05% NaI water. Since hyperplastic TEC in IFN-γ-/- mice strongly express TGF-β, transgenic NOD.H-2h4 mice expressing TGF-β on TEC were generated to test the hypothesis that overexpression of TGF-β on TEC would promote earlier and/or more severe TEC hyperplasia. Consistent with this hypothesis, all IFN-γ-/- NOD.H-2h4 mice developed severe thyrocyte hyperplasia, and compared to WT Tg- mice with L-SAT, all WT Tg+ mice developed thyrocyte hyperplasia with minimal lymphocyte infiltration 2 months after NaI water. The goal of this study was to compare lymphocyte activation in WT transgenic and nontransgenic mice to determine the mechanisms by which overexpression of TGF-β in thyroids inhibits L-SAT in TGF-β transgenic WT mice. Flow cytometry indicated that CD4 and CD8 splenic T-cells from WT Tg- mice with L-SAT and WT Tg+ mice with severe hyperplasia were similarly activated. By RT-PCR, splenocytes of WT Tg+ mice expressed slightly higher levels of TGF-β compared to WT Tg- mice. However, other cytokines did not differ significantly between WT Tg+ and WT Tg- mice, suggesting lymphocytes in both groups were activated to a similar extent. Splenocytes from both WT Tg+ and WT Tg- mice induced L-SAT after transfer to NOD.H-2h4 SCID recipients, suggesting splenocytes from Tg+ mice were activated and could induce L-SAT in Tg- recipients. RT-PCR and immunohistochemical staining showed that thyroids of WT Tg+ mice expressed more TGF-β and less IFN-γ than WT Tg- thyroids. These results suggest that overexpression of TGF-β on thyrocytes inhibits L-SAT and promotes thyrocyte hyperplasia in NOD.H-2h4 mice. Further research is needed to determine the mechanism by which TGF-β mediates these effects.
    URI
    http://hdl.handle.net/10355/632
    Collections
    • 2006 Summer Undergraduate Research and Creative Achievements Forum (MU)

    Send Feedback
    hosted by University of Missouri Library Systems
     

     


    Send Feedback
    hosted by University of Missouri Library Systems