Tacripyrines, the First Tacrine−Dihydropyridine Hybrids, as Multitarget-Directed Ligands for the Treatment of Alzheimer’s Disease
摘要:
Tacripyrines (1-14) have been designed by combining an ACNE inhibitor (tacrine) with a calcium antagonist such as nimodipine and are targeted to develop a multitarget therapeutic strategy to confront AD. Tacripyrines are selective and potent ACNE inhibitors in the nanomolar range. The mixed type inhibition of hAChE activity of compound 11 (IC50 105 +/- 15 nM) is associated to a 30.7 +/- 8.6% inhibition of the proaggregating action of ACNE on the A beta and a moderate inhibition of A beta self-aggregation (34.9 +/- 5.4%). Molecular modeling indicates that binding of compound 11 to the ACNE PAS mainly involves the (R)-11 enantiomer, which also agrees with the noncompetitive inhibition mechanism exhibited by p-methoxytacripyrine 11. Tacripyrines are neuroprotective agents, show moderate Ca2+ channel blocking effect, and cross the blood-brain barrier, emerging as lead candidates for treating AD.
Synthesis of 6-amino-1,4-dihydropyridines that prevent calcium overload and neuronal death
摘要:
The synthesis and pharmacology of 6-amino-1,4-dihydropyridines, such as ethyl 6-amino-4-aryl-5-cyano-1,4-dihydro-2-methyl-3-pyridinecarboxylic acids (3-16) and 2-amino-4-aryl-7,7-dimethyl-5-oxo-1,4,5,6,7,8-hexahydro-3-quinolinenitriles (17-21) are described. Compounds 18 and 21, at the concentration of 0.3 mu M, proved to be the best blockers of the [Ca2+] overload induced by depolarization with high [K+] of SH-SY5Y neuroblastoma cells, with values of 63.8% and 50.4%, respectively. Most of the compounds induced a remarkable neuroprotective effect against toxicity caused by high [K+]-elicited [Ca2+] overload, and against H2O2-generated free radicals, in SH-SY5Y cells. (c) 2007 Elsevier Masson SAS. All rights reserved.
Tacripyrines, the First Tacrine−Dihydropyridine Hybrids, as Multitarget-Directed Ligands for the Treatment of Alzheimer’s Disease
作者:José Marco-Contelles、Rafael León、Cristóbal de los Ríos、Abdelouahid Samadi、Manuela Bartolini、Vincenza Andrisano、Oscar Huertas、Xavier Barril、F. Javier Luque、María I. Rodríguez-Franco、Beatriz López、Manuela G. López、Antonio G. García、María do Carmo Carreiras、Mercedes Villarroya
DOI:10.1021/jm801292b
日期:2009.5.14
Tacripyrines (1-14) have been designed by combining an ACNE inhibitor (tacrine) with a calcium antagonist such as nimodipine and are targeted to develop a multitarget therapeutic strategy to confront AD. Tacripyrines are selective and potent ACNE inhibitors in the nanomolar range. The mixed type inhibition of hAChE activity of compound 11 (IC50 105 +/- 15 nM) is associated to a 30.7 +/- 8.6% inhibition of the proaggregating action of ACNE on the A beta and a moderate inhibition of A beta self-aggregation (34.9 +/- 5.4%). Molecular modeling indicates that binding of compound 11 to the ACNE PAS mainly involves the (R)-11 enantiomer, which also agrees with the noncompetitive inhibition mechanism exhibited by p-methoxytacripyrine 11. Tacripyrines are neuroprotective agents, show moderate Ca2+ channel blocking effect, and cross the blood-brain barrier, emerging as lead candidates for treating AD.
Synthesis of 6-amino-1,4-dihydropyridines that prevent calcium overload and neuronal death
作者:Rafael León、Cristóbal de los Ríos、José Marco-Contelles、Manuela G. López、Antonio G. García、Mercedes Villarroya
DOI:10.1016/j.ejmech.2007.06.001
日期:2008.3
The synthesis and pharmacology of 6-amino-1,4-dihydropyridines, such as ethyl 6-amino-4-aryl-5-cyano-1,4-dihydro-2-methyl-3-pyridinecarboxylic acids (3-16) and 2-amino-4-aryl-7,7-dimethyl-5-oxo-1,4,5,6,7,8-hexahydro-3-quinolinenitriles (17-21) are described. Compounds 18 and 21, at the concentration of 0.3 mu M, proved to be the best blockers of the [Ca2+] overload induced by depolarization with high [K+] of SH-SY5Y neuroblastoma cells, with values of 63.8% and 50.4%, respectively. Most of the compounds induced a remarkable neuroprotective effect against toxicity caused by high [K+]-elicited [Ca2+] overload, and against H2O2-generated free radicals, in SH-SY5Y cells. (c) 2007 Elsevier Masson SAS. All rights reserved.