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Search: WFRF:(Fischbeck KH)

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  • Bott, LC, et al. (author)
  • The polyglutamine-expanded androgen receptor responsible for spinal and bulbar muscular atrophy inhibits the APC/C(Cdh1) ubiquitin ligase complex
  • 2016
  • In: Scientific reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 6, s. 27703-
  • Journal article (peer-reviewed)abstract
    • Polyglutamine expansion in the androgen receptor (AR) causes spinal and bulbar muscular atrophy (SBMA), an X-linked neuromuscular disease that is fully manifest only in males. It has been suggested that proteins with expanded polyglutamine tracts impair ubiquitin-dependent proteolysis due to their propensity to aggregate, but recent studies indicate that the overall activity of the ubiquitin-proteasome system is preserved in SBMA models. Here we report that AR selectively interferes with the function of the ubiquitin ligase anaphase-promoting complex/cyclosome (APC/C), which, together with its substrate adaptor Cdh1, is critical for cell cycle arrest and neuronal architecture. We show that both wild-type and mutant AR physically interact with the APC/CCdh1 complex in a ligand-dependent fashion without being targeted for proteasomal degradation. Inhibition of APC/CCdh1 by mutant but not wild-type AR in PC12 cells results in enhanced neurite outgrowth which is typically followed by rapid neurite retraction and mitotic entry. Our data indicate a role of AR in neuronal differentiation through regulation of APC/CCdh1 and suggest abnormal cell cycle reactivation as a pathogenic mechanism in SBMA.
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  • Rinaldi, C, et al. (author)
  • Muscle matters in Kennedy's disease
  • 2014
  • In: Neuron. - : Elsevier BV. - 1097-4199 .- 0896-6273. ; 82:2, s. 251-253
  • Journal article (peer-reviewed)
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  • Result 1-8 of 8

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