Novel chelators based on adamantane-derived semicarbazones and hydrazones that target multiple hallmarks of Alzheimer's disease

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Palanimuthu, Duraippandi
Wu, Zhixuan
Jansson, Patric J
Braidy, Nady
Bernhardt, Paul V
Richardson, Des R
Kalinowski, Danuta S
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2018
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Abstract

Alzheimer's disease (AD) is characterized by multiple pathological hallmarks, including β-amyloid aggregation, oxidative stress, and metal dys-homeostasis. In the absence of treatments addressing its multi-factorial pathology, we designed novel multi-functional adamantane-based semicarbazones and hydrazones (1-12) targeting AD hallmarks. Of these, 2-pyridinecarboxaldehyde (N-adamantan-1-yl)benzoyl-4-amidohydrazone (10) was identified as the lead compound, which demonstrated: (1) pronounced iron chelation efficacy; (2) attenuation of CuII-mediated β-amyloid aggregation; (3) low cytotoxicity; (4) inhibition of oxidative stress; and (5) favorable characteristics for effective blood-brain barrier permeation. Structure-activity relationships revealed that pyridine-derived hydrazones represent a promising pharmacophore for future design strategies due to their ability to bind critical FeII pools. Collectively, the unique multi-functional activity of these agents provides a novel therapeutic strategy for AD treatment.

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Dalton Transactions

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47

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21

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Inorganic chemistry

Theoretical and computational chemistry

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Science & Technology

Physical Sciences

Chemistry, Inorganic & Nuclear

Chemistry

IRON OVERLOAD DISEASE

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Palanimuthu, D; Wu, Z; Jansson, PJ; Braidy, N; Bernhardt, PV; Richardson, DR; Kalinowski, DS, Novel chelators based on adamantane-derived semicarbazones and hydrazones that target multiple hallmarks of Alzheimer's disease, Dalton Transactions, 2018, 47 (21), pp. 7190-7205

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