CN

Liang Luo

Professor

Supervisor of Doctorate Candidates

Supervisor of Master's Candidates

Gender:Male

Status:Employed

Department:School of Life Science and Technology

Education Level:Postgraduate (Doctoral)

Discipline:Biomedical Engineering

Details >

Paper Publications

Conformation-reconstructed multivalent antibody mimic for amplified mitigation of human islet amyloid polypeptide amyloidogenesis

Release time:2022-05-26 Hits:

Journal:Nanoscale

Volume:14

Issue:7

Page Number:2802-2815

ISSN No.:2040-3364

Key Words:Alpha-synuclein;Gold nanoparticles;Alzheimers-disease;Fibril Formation;Mechanism;IAPP;Organization;Nucleation;Progess

DOI number:10.1039/d1nr08090c

Date of Publication:2022-01-17

Impact Factor:7.79

Abstract:The misfolding and aggregation of human islet amyloid polypeptide (IAPP) into β-sheet-enriched amyloid fibrils is linked to type 2 diabetes. Antibodies are potent inhibitors of IAPP amyloidogenesis, but their preparation is usually complicated and expensive. Here we have created a multivalent antibody mimic SPEPS@Au through conformational engineering of the complementary-determining regions (CDRs) of antibodies on gold nanoparticles (AuNPs). By immobilizing both terminals of an IAPP-recognizing CDR loop (PEP) on the surface of AuNPs, the active conformation of PEP can simply recur on the gold-based antibody mimic, significantly enhancing the binding affinity between PEP and IAPP. SPEPS@Au mitigated amyloidogenesis of IAPP at low sub-stoichiometric concentrations, even after IAPP started aggregating, and dramatically reduced the amyloidogenesis-induced toxicity and ROS production both in vitro and in vivo. The conformation-reconstructed multivalent antibody mimic not only renders a facile strategy to approach potent amyloidogenesis inhibitors, but also provides new perspectives to exploit NP-based substitutes for antibodies in various applications.

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