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- Alafuzoff, IrinaDepartment of Neuroscience and Neurology, University of Kuopio Finland (author)
Beta-amyloid deposition in brains of subjects with diabetes
- Article/chapterEnglish2009
Publisher, publication year, extent ...
- Wiley,2009
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:uu-153118
- https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-153118URI
- https://doi.org/10.1111/j.1365-2990.2008.00948.xDOI
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- Language:English
- Summary in:English
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- AIM:A causative association between diabetes mellitus (DM) and Alzheimer's disease (AD) has been suggested based on clinical and epidemiological studies. One hypothesis is that the link between DM and AD is related to the function of insulin-degrading enzyme (IDE), an enzyme that degrades not only insulin and pancreatic amylin but also beta-amyloid (Abeta). Thus, in diabetics, insulin and Abeta might compete for IDE and this might lead to an increase in Abeta. The objective of this study was to test the hypothesis that hyperinsulinaemia can elevate Abeta levels and thus contribute to AD pathology in humans.METHODS:Neuropathological examination was carried out employing conventional and immunohistochemical (IHC) methods of the brains obtained post mortem from 701 aged subjects.RESULTS:The loads of IHC/Abeta, silver stained neuritic plaques (NP) and neurofibrillary tangles (NFT) were significantly higher in subjects carrying the Apolipoprotein E e4 allele. In contrast, the loads of Abeta, NPs and NFT in the brains were not influenced by hyperglycaemia when comparing 134 diabetic with 567 non-diabetic subjects.CONCLUSIONS:We conclude that the hypothesis that hyperinsulinaemia would significantly elevate the Abeta load and thus increase the extent of AD pathology cannot be supported. Our result challenges the claim that DM is a direct risk factor of developing AD. Thus further studies on pathological lesions in demented diabetics should be conducted.
Subject headings and genre
- MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Neurologi hsv//swe
- MEDICAL AND HEALTH SCIENCES Clinical Medicine Neurology hsv//eng
- MEDICIN OCH HÄLSOVETENSKAP Medicinska och farmaceutiska grundvetenskaper Cell- och molekylärbiologi hsv//swe
- MEDICAL AND HEALTH SCIENCES Basic Medicine Cell and Molecular Biology hsv//eng
- Neurology
- Neurologi
- Pathology
- Patologi
- Neurology
- Neurologi
- Pathology
- Patologi
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- Aho, L (author)
- Helisalmi, S (author)
- Mannermaa, A (author)
- Soininen, H (author)
- Department of Neuroscience and Neurology, University of Kuopio Finland (creator_code:org_t)
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- In:Neuropathology and Applied Neurobiology: Wiley35:1, s. 60-680305-18461365-2990
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