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- W2008488809 abstract "Huntington's disease (HD) is an inheritable neurological disorder caused by an abnormal expansion of the polyglutamine tract in the N-terminus of the protein huntingtin (htt). Mutant htt (mhtt) leads to selective neurodegeneration that preferentially affects striatal medium spiny neurons. Although mhtt is also expressed in astrocytes, whether and how astrocyte derived mhtt contributes to the neurodegeneration in HD remains largely unknown. In this study, a glia HD model, using an adenoviral vector to express wild-type and mutant N-terminal huntingtin fragment 1–552 aa (htt552) in rat primary cortical astrocytes, was generated. The influence of htt552 on the protein level of brain-derived neurotrophic factor (BDNF) in astrocytes was evaluated. Immunofluorescence showed that htt552-100Q formed aggregates in some astrocytes. These mhtt aggregates sequestered clathrin immunoreactivities and dispersed the Golgi complex. ELISA and immunofluorescence demonstrated an increase in BDNF levels in the astrocytes expressing htt552-100Q. Western blot analysis showed that there was an increase in pro-BDNF, but a decrease in mature BDNF in the astrocytes expressing htt552-100Q. Furthermore, medium collected from astrocytes expressing htt552-100Q showed a lower level of mature BDNF and less activity in supporting neurite development of primary cortical neurons. These results suggest that aggregates formed by mutant htt552 affect processing and secretion of the BDNF in astrocytes, which might contribute to the neuronal dysfunction and degeneration in HD." @default.
- W2008488809 created "2016-06-24" @default.
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- W2008488809 date "2012-04-01" @default.
- W2008488809 modified "2023-10-13" @default.
- W2008488809 title "Expression of mutant N-terminal huntingtin fragment (htt552-100Q) in astrocytes suppresses the secretion of BDNF" @default.
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- W2008488809 doi "https://doi.org/10.1016/j.brainres.2012.01.077" @default.
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