Molecules
(Apr 2019)
QuinoxalineTacrine QT78, a Cholinesterase Inhibitor as a Potential Ligand for Alzheimer’s Disease Therapy
Eva Ramos,
Alejandra Palomino-Antolín,
Manuela Bartolini,
Isabel Iriepa,
Ignacio Moraleda,
Daniel Diez-Iriepa,
Abdelouahid Samadi,
Carol V. Cortina,
Mourad Chioua,
Javier Egea,
Alejandro Romero,
José Marco-Contelles
Affiliations
Eva Ramos
Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Complutense University of Madrid, 28040 Madrid, Spain
Alejandra Palomino-Antolín
Molecular Neuroinflammation and Neuronal Plasticity Laboratory, Research Unit, Hospital Universitario Santa Cristina, 28009 Madrid, Spain
Manuela Bartolini
Department of Pharmacy and Biotechnology, Alma Mater Studiorum University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
Isabel Iriepa
Departamento de Química Orgánica and Química Inorgánica. Ctra. Madrid-Barcelona, Km. 33,6. Universidad de Alcalá, 28871 Madrid, Spain
Ignacio Moraleda
Departamento de Química Orgánica and Química Inorgánica. Ctra. Madrid-Barcelona, Km. 33,6. Universidad de Alcalá, 28871 Madrid, Spain
Daniel Diez-Iriepa
Departamento de Química Orgánica and Química Inorgánica. Ctra. Madrid-Barcelona, Km. 33,6. Universidad de Alcalá, 28871 Madrid, Spain
Abdelouahid Samadi
Laboratory of Medicinal Chemistry (IQOG, CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
Carol V. Cortina
Laboratory of Medicinal Chemistry (IQOG, CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
Mourad Chioua
Laboratory of Medicinal Chemistry (IQOG, CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
Javier Egea
Molecular Neuroinflammation and Neuronal Plasticity Laboratory, Research Unit, Hospital Universitario Santa Cristina, 28009 Madrid, Spain
Alejandro Romero
Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Complutense University of Madrid, 28040 Madrid, Spain
José Marco-Contelles
Laboratory of Medicinal Chemistry (IQOG, CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
DOI
https://doi.org/10.3390/molecules24081503
Journal volume & issue
Vol. 24,
no. 8
p.
1503
Abstract
Read online
We report the synthesis and relevant pharmacological properties of the quinoxalinetacrine (QT) hybrid QT78 in a project targeted to identify new non-hepatotoxic tacrine derivatives for Alzheimer’s disease therapy. We have found that QT78 is less toxic than tacrine at high concentrations (from 100 μM to 1 mM), less potent than tacrine as a ChE inhibitor, but shows selective BuChE inhibition (IC50 (hAChE) = 22.0 ± 1.3 μM; IC50 (hBuChE) = 6.79 ± 0.33 μM). Moreover, QT78 showed effective and strong neuroprotection against diverse toxic stimuli, such as rotenone plus oligomycin-A or okadaic acid, of biological significance for Alzheimer’s disease.
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