A fibril-specific, conformation-dependent antibody recognizes a subset of Aβ plaques in Alzheimer disease, Down syndrome and Tg2576 transgenic mouse brain

Floyd Sarsoza, Tommy Saing, Rakez Kayed, Robert Dahlin, Malcolm Dick, Camille Broadwater-Hollifield, Scott Mobley, Ira Lott, Eric Doran, Daniel Gillen, Clifford Anderson-Bergman, David H. Cribbs, Charles Glabe, Elizabeth Head

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

Beta-amyloid (Aβ) is thought to be a key contributor to the pathogenesis of Alzheimer disease (AD) in the general population and in adults with Down syndrome (DS). Different assembly states of Aβ have been identified that may be neurotoxic. Aβ oligomers can assemble into soluble prefibrillar oligomers, soluble fibrillar oligomers and insoluble fibrils. Using a novel antibody, OC, recognizing fibrils and soluble fibrillar oligomers, we characterized fibrillar Aβ deposits in AD and DS cases. We further compared human specimens to those obtained from the Tg2576 mouse model of AD. Our results show that accumulation of fibrillar immunoreactivity is significantly increased in AD relative to nondemented aged subjects and those with select cognitive impairments (p < 0.0001). Further, there was a significant correlation between the extent of frontal cortex fibrillar deposit accumulation and dementia severity (MMSE r = -0.72). In DS, we observe an early age of onset and age-dependent accumulation of fibrillar OC immunoreactivity with little pathology in similarly aged non-DS individuals. Tg2576 mice show fibrillar accumulation that can be detected as young as 6 months. Interestingly, fibril-specific immunoreactivity was observed in diffuse, thioflavine S-negative Aβ deposits in addition to more mature neuritic plaques. These results suggest that fibrillar deposits are associated with disease in both AD and in adults with DS and their distribution within early Aβ pathology associated with diffuse plaques and correlation with MMSE suggest that these deposits may not be as benign as previously thought.

Original languageEnglish (US)
Pages (from-to)505-517
Number of pages13
JournalActa Neuropathologica
Volume118
Issue number4
DOIs
StatePublished - Apr 10 2009
Externally publishedYes

Keywords

  • Diffuse plaques
  • Frontal cortex
  • Transgenic mouse
  • Trisomy 21

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Clinical Neurology
  • Cellular and Molecular Neuroscience

Fingerprint Dive into the research topics of 'A fibril-specific, conformation-dependent antibody recognizes a subset of Aβ plaques in Alzheimer disease, Down syndrome and Tg2576 transgenic mouse brain'. Together they form a unique fingerprint.

  • Cite this

    Sarsoza, F., Saing, T., Kayed, R., Dahlin, R., Dick, M., Broadwater-Hollifield, C., Mobley, S., Lott, I., Doran, E., Gillen, D., Anderson-Bergman, C., Cribbs, D. H., Glabe, C., & Head, E. (2009). A fibril-specific, conformation-dependent antibody recognizes a subset of Aβ plaques in Alzheimer disease, Down syndrome and Tg2576 transgenic mouse brain. Acta Neuropathologica, 118(4), 505-517. https://doi.org/10.1007/s00401-009-0530-3