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Transactive DNA Binding Protein 43 Rather Than Other Misfolded Proteins in the Brain is Associated with Islet Amyloid Polypeptide in Pancreas in Aged Subjects with Diabetes Mellitus
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Clinical and experimental pathology. Uppsala Univ Hosp, Dept Pathol, Uppsala, Sweden..
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Clinical and experimental pathology. Uppsala Univ Hosp, Dept Pathol, Uppsala, Sweden..
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Clinical and experimental pathology. Uppsala Univ Hosp, Dept Pathol, Uppsala, Sweden..
2017 (English)In: Journal of Alzheimer's Disease, ISSN 1387-2877, E-ISSN 1875-8908, Vol. 59, no 1, p. 43-56Article in journal (Refereed) Published
Abstract [en]

A link between diabetes mellitus (DM) related islet amyloid polypeptide (IAPP) and Alzheimer's disease (AD) related amyloid-beta (A beta) has been suggested in epidemiological and clinical studies. In 2017, proof for existing interaction between type 2 DM and AD on a molecular level was provided based on research carried out in experimental animal models. We assessed aging-related neurodegenerative lesions, i.e., misfolded proteins, associated with dementia such as hyperphosphorylated tau (HP tau), A beta, alpha-synuclein (alpha S), and phosphorylated transactive DNA binding protein 43 (pTDP43) seen in the brain and IAPP seen in the pancreas in subjects with and without DM applying immunohistochemical techniques. HP tau in the brain and IAPP in the pancreas were observed in most subjects. The prevalence and the extent of all misfolded proteins increased with age but this increase was not influenced by DM. Interestingly the extent of misfolded proteins in the brain was higher in non-diabetics when compared with diabetics in demented. A significant correlation was observed between HP tau, A beta, alpha S, and pTDP43, whereas IAPP showed no association with HP tau, A beta, and alpha S. In subjects with DM, the extent of pTDP43 in brain correlated with the extent of IAPP in pancreas. Thus, there is no evidence of a link between AD-related pathology and DM in humans, whereas an association was found between pTDP43 and IAPP in DM. TDP43 is ubiquitously expressed in all organs but whether TDP43 is phosphorylated in other organs in DM or whether the phosphorylation of TDP43 is influenced by glucose metabolism is yet unknown.

Place, publisher, year, edition, pages
IOS Press, 2017. Vol. 59, no 1, p. 43-56
Keyword [en]
alpha-synuclein, amyloid-beta, diabetes mellitus, islet amyloid polypeptide, hyperphosphorylated tau, phosphorylated transactive DNA binding protein 43
National Category
Neurosciences
Identifiers
URN: urn:nbn:se:uu:diva-330074DOI: 10.3233/JAD-170192ISI: 000404876400006PubMedID: 28582864OAI: oai:DiVA.org:uu-330074DiVA, id: diva2:1150685
Available from: 2017-10-19 Created: 2017-10-19 Last updated: 2018-01-13Bibliographically approved

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