25842-31-3Relevant academic research and scientific papers
Novel Sigma Receptor Ligand-Nitric Oxide Photodonors: Molecular Hybrids for Double-Targeted Antiproliferative Effect
Amata, Emanuele,Dichiara, Maria,Arena, Emanuela,Pittalà, Valeria,Pistarà, Venerando,Cardile, Venera,Graziano, Adriana Carol Eleonora,Fraix, Aurore,Marrazzo, Agostino,Sortino, Salvatore,Prezzavento, Orazio
, p. 9531 - 9544,9531 - 9544 (2017/12/15)
This contribution reports the synthesis and evaluation of novel hybrid compounds that conjugate a sigma (σ) receptor pharmacophore and a nitric oxide (NO) photodonor. All compounds preserve their capability to generate NO under visible light and possess overall σ receptor nanomolar affinity, with one of them (8b) exhibiting remarkable σ2 receptor selectivity. Compounds 8b, 11a, and 11b were tested on tumorigenic MCF-7 and A2058 cells expressing high levels of σ2 and σ1 receptor, respectively. Considerable loss of cell viability was detected under light excitation, while negligible effects in the dark were detected. Moreover, they did not show any significant cytotoxicity in the dark or under irradiation on nontumorigenic NCTC-2544 keratinocytes. NO-induced reduction of cellular viability was demonstrated by in-cell NO detection and total nitrite estimation. For the first time, a combination of σ receptor moieties and a NO photodonor is reported, providing distinctive ligands potentially useful for cancer management.
Synthesis, biological evaluation and molecular docking study of novel piperidine and piperazine derivatives as multi-targeted agents to treat Alzheimer's disease
Meena, Poonam,Nemaysh, Vishal,Khatri, Manisha,Manral, Apra,Luthra, Pratibha Mehta,Tiwari, Manisha
, p. 1135 - 1148 (2015/03/04)
Development of Multi-Target Directed Ligands (MTDLs) has emerged as a promising approach for targeting complex etiology of Alzheimer's disease (AD). Following this approach, a new series of N′-(4-benzylpiperidin-/piperazin-/benzhydrylpiperazin-1-yl)alkylamine derivatives were designed, synthesized and biologically evaluated as inhibitors of cholinesterases (ChEs), amyloid-beta (Aβ) self aggregation and also for their radical scavenging activity. The in vitro studies showed that the majority of synthesized derivatives strongly inhibited acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) with IC50 values in the low-nanomolar range, and were clearly more potent than the reference compound donepezil in this regard. Among them, inhibitors 5h and 5k, strongly inhibited AChE, with IC50 value of 6.83 nM and 2.13 nM, respectively, and particularly, compound 5k was found to be highly selective for AChE (~38-fold). Moreover, both kinetic analysis of AChE inhibition and the docking study suggested that 5k binds simultaneously to catalytic active site and peripheral anionic site of AChE. Besides, these compounds also exhibited greater ability to inhibit self-induced Aβ1-42 aggregation at 25 μM with percentage inhibition from ~54% to 89% and specially compound 5k provided highest inhibition (88.81%). Also, the derivatives containing methoxy and hydroxy groups showed potent oxygen radical absorbance capacity (ORAC) ranging from 2.2- to 4.4-fold of the Trolox value. Furthermore, results of ADMET studies suggested that all compounds exhibited appropriate drug like properties. Taken together, these results suggest that 5k might be a promising lead compound for further AD drug development.
A Novel Cleavage Technique to Generate Small Molecule Compounds and Libraries via a Two-Resin System
Ouyang, Xiaohu,Armstrong, Robert W.,Murphy, Martin M.
, p. 1027 - 1032 (2007/10/03)
Application of organic synthesis to solid supports has led to the successful implementation of combinatorial chemistry in the drug discovery process. This paper describes a novel use of the Hofmann elimination of tetrasubstituted amine salts on solid-phas
Synthesis, biological evaluation, and quantitative structure. A new class of potent H1 antagonists
Saxena,Agarwal,Patnaik,Saxena
, p. 2970 - 2976 (2007/10/02)
Some [β-(Aroylamino)ethyl]piperazines and -piperidines and [2-[(Arylamino)carbonyl]ethyl]piperazines, -piperidines, -pyrazinopyridoindoles, and -pyrazinoisoquinolines have been synthesized and their H1-antagonistic activity studied in isolated guinea pig
