Inclusions of R6/2 Mice Are Not Amyloid and Differ Structurally from Those of Huntington Disease Brain
| Autor: | Guylaine Hoffner, Philippe Djian, Christophe Sandt, William André, Isabelle Nondier |
|---|---|
| Přispěvatelé: | Laboratoire de physiologie cérébrale (LPC - UMR 8118), Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Amyloid Huntingtin Transgene Mice Transgenic Disease Striatum [SDV.BC]Life Sciences [q-bio]/Cellular Biology Analytical Chemistry Mice 03 medical and health sciences 0302 clinical medicine Spectroscopy Fourier Transform Infrared mental disorders medicine Animals ComputingMilieux_MISCELLANEOUS Huntingtin Protein Microscopy Principal Component Analysis Chemistry Brain Molecular biology Disease Models Animal Huntington Disease 030104 developmental biology medicine.anatomical_structure Biochemistry Cerebral cortex Peptides 030217 neurology & neurosurgery |
| Zdroj: | Analytical Chemistry Analytical Chemistry, American Chemical Society, 2017, 89 (10), pp.5201-5209. ⟨10.1021/acs.analchem.6b04199⟩ |
| ISSN: | 0003-2700 1520-6882 |
| Popis: | R6/2 mice contain an N-terminal fragment of human huntingtin with an expanded polyQ and develop a neurological disease resembling Huntington disease. Although the brain of R6/2 mice contains numerous inclusions, there is very little neuronal death. In that respect, R6/2 mice differ from patients with Huntington disease whose striatum and cerebral cortex develop inclusions associated with extensive neuronal loss. We have previously demonstrated using synchrotron-based infrared microspectroscopy that the striatum and the cortex of patients with Huntington disease contained inclusions specifically enriched in amyloid β-sheets. We had concluded that the presence of an amyloid motif conferred toxicity to the inclusions. We demonstrate here by synchrotron based infrared microspectroscopy in transmission and attenuated total reflectance mode that the inclusions of R6/2 mice possess no detectable amyloid and are composed of proteins whose structure is not distinguishable from that of the surrounding soluble proteins. The difference in structure between the inclusions of patients affected by Huntington disease and those of R6/2 mice might explain why the former but not the latter cause neuronal death. |
| Databáze: | OpenAIRE |
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