Article (Scientific journals)
Potential amyloid plaque-specific peptides for the diagnosis of Alzheimer's disease
Larbanoix, Lionel; Burtea, Carmen; Laurent, Sophie et al.
2010In Neurobiology of Aging, 31 (10), p. 1679-89
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Abstract :
[en] Amyloid plaques (AP) represent one of the main molecular hallmarks of Alzheimer's disease (AD). In order to develop new AP-specific contrast agents for AD molecular imaging, the phage display technology was used to identify peptides specific to amyloid-beta (A beta(42)). A random disulfide constrained heptapeptide phage display library was screened against A beta(42). After biopanning, 72 phage clones were isolated and their binding affinity to A beta(42) was evaluated by enzyme-linked immunosorbent assay (ELISA). The final library was enriched in two peptide sequences. The K(d) of candidate phage clones for binding to A beta(42) are in the picomolar range. The binding affinity for A beta(42) of two selected peptides was confirmed by ELISA, and the specific interaction with AP was validated by immunohistochemistry on brain sections. The preliminary MRI in vivo study, which was performed with a peptide functionalized contrast agent on AD transgenic mouse, showed encouraging results. To conclude, low molecular weight peptides presenting a specific affinity for A beta(42) were identified by phage display. As specific carriers, they have a real potential for molecular imaging of AD thanks to AP binding.
Disciplines :
Radiology, nuclear medicine & imaging
Biotechnology
Author, co-author :
Larbanoix, Lionel  
Burtea, Carmen  ;  Université de Mons > Faculté de Médecine et de Pharmacie > Chimie générale, organique et biomédicale
Laurent, Sophie  ;  Université de Mons > Faculté de Médecine et de Pharmacie > Chimie générale, organique et biomédicale
Van Leuven, Fred
Toubeau, Gérard
Vander Elst, Luce ;  Université de Mons > Faculté de Médecine et de Pharmacie > Chimie générale, organique et biomédicale
Muller, Robert ;  Université de Mons > Faculté de Médecine et de Pharmacie > Chimie générale, organique et biomédicale
Language :
English
Title :
Potential amyloid plaque-specific peptides for the diagnosis of Alzheimer's disease
Publication date :
31 October 2010
Journal title :
Neurobiology of Aging
ISSN :
0197-4580
Publisher :
Elsevier, Netherlands
Volume :
31
Issue :
10
Pages :
1679-89
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
M108 - Chimie générale, organique et biomédicale
M118 - Histologie
Research institute :
R550 - Institut des Sciences et Technologies de la Santé
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