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- W1996952865 abstract "The time course of formation of neurofibrillary tangles (NFT) and senile plaques (SP) in Alzheimer's disease (AD) brain is unknown. Above ground nuclear weapons testing in the late 1950s and early 1960s led to significantly increased levels of 14C in the atmosphere and carbon cycle. Because the amyloid beta peptide of SP and paired helical filaments of NFT, once formed, are relatively resistant to degradation, 14C levels observed in SP and NFT should reflect their year of formation. The purpose of this study was to develop a method to determine whether 14C levels could be used to define NFT and SP ages. Using accelerator mass spectrometry to measure bomb-pulse 14C levels, we determined the average age of formation of isolated SP and NFT fractions in bulk brain samples of 6 AD subjects. Although preliminary, the results demonstrate that it is possible to use bomb pulse 14C to determine the average year of formation of NFT and SP in the brain in AD. In addition, the data show that these structures, once formed, have a much slower carbon turnover rate than normal brain and are not in a formation/enzymatic degradation equilibrium." @default.
- W1996952865 created "2016-06-24" @default.
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- W1996952865 date "2002-03-01" @default.
- W1996952865 modified "2023-10-12" @default.
- W1996952865 title "Use of bomb pulse carbon-14 to age senile plaques and neurofibrillary tangles in Alzheimer’s disease" @default.
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- W1996952865 doi "https://doi.org/10.1016/s0197-4580(01)00281-0" @default.
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