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Production and characterization of RNA aptamers specific for amyloid fibril epitopes

Bunka, DHJ; Mantle, BJ; Morten, IJ; Tennent, GA; Radford, SE; Stockley, PG; (2007) Production and characterization of RNA aptamers specific for amyloid fibril epitopes. J BIOL CHEM , 282 (47) 34500 - 34509. 10.1074/jbc.M703679200. Gold open access

Abstract

One of the most fascinating features of amyloid fibrils is their generic cross-beta architecture that can be formed from many different and completely unrelated proteins. Nonetheless, amyloid fibrils with diverse structural and phenotypic properties can form, both in vivo and in vitro, from the same protein sequence. Here, we have exploited the power of RNA selection techniques to isolate small, structured, single-stranded RNA molecules known as aptamers that were targeted specifically to amyloid-like fibrils formed in vitro from beta(2)-microglobulin (beta(2)m), the amyloid fibril protein associated with dialysis-related amyloidosis. The aptamers bind with high affinity (apparent K-D similar to nM) to beta(2)m fibrils with diverse morphologies generated under different conditions in vitro, as well as to amyloid fibrils isolated from tissues of dialysis-related amyloidosis patients, demonstrating that they can detect conserved epitopes between different fibrillar species of beta(2)m. Interestingly, the aptamers also recognize some other, but not all, amyloid fibrils generated in vitro or isolated from ex vivo sources. Based on these observations, we have shown that although amyloid fibrils share many common structural properties, they also have features that are unique to individual fibril types.

Type: Article
Title: Production and characterization of RNA aptamers specific for amyloid fibril epitopes
Open access status: An open access publication
DOI: 10.1074/jbc.M703679200
Keywords: DIALYSIS-RELATED AMYLOIDOSIS, FORMATION IN-VITRO, PRION-PROTEIN, SYSTEMIC AMYLOIDOSIS, MOLECULAR-MECHANISM, SECONDARY STRUCTURE, ALZHEIMER-DISEASE, CRYSTAL-STRUCTURE, OPERATOR COMPLEX, NEUTRAL PH
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Medicine
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Medicine > Inflammation
URI: http://discovery.ucl.ac.uk/id/eprint/105436
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