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- W2056559947 abstract "Band 3, a ubiquitous membrane transport, regulatory, and structural protein, is represented in brain by at least 4 isoforms. Bands 3 in brain performs the same functions as it does in erythrocytes (RBC). It is susceptible to oxidative damage, which, ultimately, terminates its life and that of the cell. We examined the changes band 3 undergoes in Alzheimer’s disease (AD) because our previous studies suggest that band 3 is a pivotal protein in neurological disease. Because we hypothesize that AD is a total body disease, we examined peripheral blood cells as well as brain tissue to determine whether the same changes occur in both. Our results indicate that posttranslational changes occur in RBC band 3 that parallel changes in brain band 3. These include decreased <sup>32</sup>P-phosphate labeling in vitro of band 3 polypeptides in brain and RBC, increased degradation of band 3, alterations in band 3 recognized by polyclonal and monoclonal antibodies, and decreased anion and glucose transport by blood cells. Serum autoantibodies to band 3 peptides 588-602 and 822-839 were increased in AD patients compared to controls. These band 3 residues lie in anion transport/binding regions. This is consistent with alteration of this region in AD since it is recognized as antigenically different by the patients’ immune system. Our data support an immunological component to AD. The finding that changes in RBC in AD reflect those in brain and can be recognized by antibodies should facilitate development of blood tests for diagnosis and monitoring, and early therapy. It is anticipated that identification of molecular sites of posttranslational modification of band 3 will enable us to design specific preventive and treatment strategies, and target drugs to crucial molecular sites." @default.
- W2056559947 created "2016-06-24" @default.
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- W2056559947 date "1997-01-01" @default.
- W2056559947 modified "2023-10-04" @default.
- W2056559947 title "Brain and Erythrocyte Anion Transporter Protein, Band 3, as a Marker for Alzheimer’s Disease: Structural Changes Detected by Electron Microscopy, Phosphorylation, and Antibodies" @default.
- W2056559947 doi "https://doi.org/10.1159/000213835" @default.
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