2026-04-14T02:17:26Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1805352025-12-05T10:09:21Zcom_2072_1057col_2072_478916col_2072_478917col_2072_478929

00925njm 22002777a 4500 dc Benseny Cases, Núria author Álvarez Marimon, Elena author Aso Pérez, Ester author Carmona Murillo, Margarita author Klementieva, Oxana author Appelhans, Dietmar author Ferrer, Isidre author Cladera, Josep author 2021-10-11T11:12:54Z 2021-10-11T11:12:54Z 2021-09-15 2021-10-07T07:33:26Z Amyloid plaques composed of Aβ amyloid peptides and neurofibrillary tangles are a pathological hallmark of Alzheimer Disease. In situ identification of early-stage amyloid aggregates in Alzheimer's disease is relevant for their importance as potential targets for effective drugs. Synchrotron-based infrared imaging is here used to identify early-stage oligomeric/granular aggregated amyloid species in situ in the brain of APP/PS1 transgenic mice for the first time. Also, APP/PS1 mice show fibrillary aggregates at 6 and 12 months. A significant decreased burden of early-stage aggregates and fibrillary aggregates is obtained following treatment with poly(propylene imine) dendrimers with histidine-maltose shell (a neurodegenerative protector) in 6-month-old APP/PS1 mice, thus demonstrating their putative therapeutic properties of in AD models. Identification, localization, and characterization using infrared imaging of these non-fibrillary species in the cerebral cortex at early stages of AD progression in transgenic mice point to their relevance as putative pharmacological targets. No less important, early detection of these structures may be useful in the search for markers for non-invasive diagnostic techniques. Malaltia d'Alzheimer Radiació sincrotrònica Alzheimer's disease Synchrotron radiation In situ identification and G4-PPI-His-Mal-dendrimer-induced reduction of early-stage amyloid aggregates in Alzheimer’s disease transgenic mice using synchrotron-based infrared imaging