18063-02-0Relevant articles and documents
Structure-activity relationship study and discovery of indazole 3-carboxamides as calcium-release activated calcium channel blockers
Bai, Sha,Nagai, Masazumi,Koerner, Steffi K.,Veves, Aristidis,Sun, Lijun
, p. 393 - 397 (2017)
Aberrant activation of mast cells contributes to the development of numerous diseases including cancer, autoimmune disorders, as well as diabetes and its complications. The influx of extracellular calcium via the highly calcium selective calcium-release activated calcium (CRAC) channel controls mast cell functions. Intracellular calcium homeostasis in mast cells can be maintained via the modulation of the CRAC channel, representing a critical point for therapeutic interventions. We describe the structure-activity relationship study (SAR) of indazole-3-carboxamides as potent CRAC channel blockers and their ability to stabilize mast cells. Our SAR results show that the unique regiochemistry of the amide linker is critical for the inhibition of calcium influx, the release of the pro-inflammatory mediators β-hexosaminidase and tumor necrosis factor α by activated mast cells. Thus, the indazole-3-carboxamide 12d actively inhibits calcium influx and stabilizes mast cells with sub-μM IC50. In contrast, its reverse amide isomer 9c is inactive in the calcium influx assay even at 100?μM concentration. This requirement of the specific 3-carboxamide regiochemistry in indazoles is unprecedented in known CRAC channel blockers. The new structural scaffolds described in this report expand the structural diversity of the CRAC channel blockers and may lead to the discovery of novel immune modulators for the treatment of human diseases.
PIPERAZINE SUBSTITUTED AZAPINE DERIVATIVES AND USES THEREOF
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Paragraph 1176-1178, (2021/04/23)
The present disclosure relates to compounds of Formula (I) and (II): and to their prodrugs, pharmaceutically acceptable salts, pharmaceutical compositions, methods of use, and methods for their preparation. The compounds disclosed herein are useful for modulating H1 and 5-HT2A receptors and are to be used in the treatment of sleep disorders, such as sleep fragmentation, disturbed sleep/arousals, and arousal threshold.
Hit-to-Lead Optimization of Benzoxazepinoindazoles As Human African Trypanosomiasis Therapeutics
Klug, Dana M.,Tschiegg, Laura,Diaz, Rosario,Rojas-Barros, Domingo,Perez-Moreno, Guiomar,Ceballos, Gloria,García-Hernández, Raquel,Martinez-Martinez, Maria Santos,Manzano, Pilar,Ruiz, Luis Miguel,Caffrey, Conor R.,Gamarro, Francisco,Pacanowska, Dolores Gonzalez,Ferrins, Lori,Navarro, Miguel,Pollastri, Michael P.
, p. 2527 - 2546 (2019/11/28)
Human African trypanosomiasis (HAT) is a neglected tropical disease caused by infection with either of two subspecies of the parasite Trypanosoma brucei. Due to a lack of economic incentive to develop new drugs, current treatments have severe limitations in terms of safety, efficacy, and ease of administration. In an effort to develop new HAT therapeutics, we report the structure-activity relationships around T. brucei for a series of benzoxazepinoindazoles previously identified through a high-throughput screen of human kinase inhibitors, and the subsequent in vivo experiments for HAT. We identified compound 18, which showed an improved kinase selectivity profile and acceptable pharmacokinetic parameters, as a promising lead. Although treatment with 18 cured 60% of mice in a systemic model of HAT, the compound was unable to clear parasitemia in a CNS model of the disease. We also report the results of cross-screening these compounds against T. cruzi, L. donovani, and S. mansoni.
