TY - JOUR
AU - Fülöp, Lívia
AU - Mándity, István
AU - Juhász, Gábor
AU - Szegedi, Viktor
AU - Hetényi, Anasztázia
AU - Wéber, Edit
AU - Bozsó, Zsolt
AU - Simon, Dóra
AU - Benkő, Mária
AU - Király, Zoltán
AU - Martinek, Tamás
TI - A Foldamer-Dendrimer Conjugate Neutralizes Synaptotoxic Beta-Amyloid Oligomers
JF - PLOS ONE
J2 - PLOS ONE
VL - 7
PY - 2012
IS - 7
PG - 17
SN - 1932-6203
DO - 10.1371/journal.pone.0039485
UR - https://m2.mtmt.hu/api/publication/2034805
ID - 2034805
N1 - Funding Agency and Grant Number: EU FP7 [HEALTH-F2-2007-201159, HEALTH-F2-2007-211696]; COST [CM0803]; Hungarian Research Foundation [NK81371, PD83581, PD83600, K68152]; Hungarian Academy of Sciences, Lendulet programme\n Funding text: This work was supported by the EU FP7 (HEALTH-F2-2007-201159, HEALTH-F2-2007-211696 and COST CM0803) (http://cordis.europa.eu/fp7/home_en.html); the Hungarian Research Foundation (NK81371, PD83581, PD83600 and K68152) (http://www.otka.hu/); and the Hungarian Academy of Sciences, Lendulet programme (http://mta.hu/). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.\n
Department of Medical Chemistry, University of Szeged, Szeged, Hungary
Institute of Pharmaceutical Chemistry, University of Szeged, Szeged, Hungary
Bay Zoltán Foundation for Applied Research - BAYGEN, Szeged, Hungary
Department of Physical Chemistry and Materials Science, University of Szeged, Szeged, Hungary
Cited By :31
Export Date: 24 April 2020
Correspondence Address: Martinek, T. A.; Institute of Pharmaceutical Chemistry, University of Szeged, Szeged, Hungary; email: martinek@pharm.u-szeged.hu
Chemicals/CAS: amyloid beta protein, 109770-29-8; Amyloid beta-Peptides; Dendrimers
CAplus AN 2012:1144372; MEDLINE PMID: 22859942 (Journal; Article; Research Support, Non-U.S. Gov't);
AB - Background and AimsUnnatural self-organizing biomimetic polymers (foldamers) emerged as promising materials for biomolecule recognition and inhibition. Our goal was to construct multivalent foldamer-dendrimer conjugates which wrap the synaptotoxic β-amyloid (Aβ) oligomers with high affinity through their helical foldamer tentacles. Oligomeric Aβ species play pivotal role in Alzheimer's disease, therefore recognition and direct inhibition of this undruggable target is a great current challenge.
Methods and ResultsShort helical β-peptide foldamers with designed secondary structures and side chain chemistry patterns were applied as potential recognition segments and their binding to the target was tested with NMR methods (saturation transfer difference and transferred-nuclear Overhauser effect). Helices exhibiting binding in the µM region were coupled to a tetravalent G0-PAMAM dendrimer. In vitro biophysical (isothermal titration calorimetry, dynamic light scattering, transmission electron microscopy and size-exclusion chromatography) and biochemical tests (ELISA and dot blot) indicated the tight binding between the foldamer conjugates and the Aβ oligomers. Moreover, a selective low nM interaction with the low molecular weight fraction of the Aβ oligomers was found. Ex vivo electrophysiological experiments revealed that the new material rescues the long-term potentiation from the toxic Aβ oligomers in mouse hippocampal slices at submicromolar concentration.
ConclusionsThe combination of the foldamer methodology, the fragment-based approach and the multivalent design offers a pathway to unnatural protein mimetics that are capable of specific molecular recognition, and has already resulted in an inhibitor for an extremely difficult target.
LA - English
DB - MTMT
ER -