3296-06-8Relevant articles and documents
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Clusius,Vecchi
, p. 1469,1473 (1956)
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Molecular mechanism of action of new 1,4-naphthoquinones tethered to 1,2,3-1H-triazoles with cytotoxic and selective effect against oral squamous cell carcinoma
Alvarez Abreu, Paula,Cardozo Paes de Almeida, Elan,Carolina Carvalho da Fonseca, Anna,Cavalcanti Chipoline, Ingrid,Francisco Ferreira, Vitor,Luiz Ferraz de Souza, Theo,Pereira de Souza, Michele,Pontes, Bruno,Ribeiro Machado da Costa, Gabriella,Robbs, Bruno K.,Won-Held Rabelo, Vitor,de Carvalho da Silva, Fernando,de Queiroz, Lucas N.
, (2020)
The oral squamous cell carcinoma (OSCC) stands out as a public health problem due to its high incidence and low survival rate, despite advances in diagnosis and treatment. Moreover, the most commonly chemotherapeutic agents for OSCC, such as carboplatin and cisplatin, generate important side effects, evidencing the urgency in developing new drugs. Naphthoquinones are an important class of natural products or synthetic compounds with cytotoxic effect demonstrated on different cancer types. In the present study, thirty-five 1,4-naphthoquinones tethered to 1,2,3-1H-triazoles were synthesized and the antitumor activity and molecular mechanisms were evaluated in several assays including in vitro and in vivo models of OSCC and normal oral human cells. Compounds 16a, 16b and 16 g were able to induce cytotoxicity in three different tumor cell lines of human OSCC (SCC4, SCC9 and SCC25) and were more toxic and selective to tumor cells (Selective Index, SI > 2) than classical and chemically similar controls (Carboplatin and Lapachol). Compound 16 g showed the higher SI value. Besides, compounds 16a, 16b and 16 g significantly reduced colony formation of SCC9 cells in the tested concentrations. Hemolytic assay using compounds 16a, 16b and 16 g at high concentrations showed no compound exhibited hemolysis higher than 5%, similar to controls. In vivo acute toxicity study showed that 16 g was the only one, among the three compounds, with no apparent limiting toxic effects on mice in the tested concentrations. Thus, the investigation of cell death mechanisms was conducted with this compound. 16 g does not trigger ROS production nor binds to DNA. On the other hand, compound 16 g induced microtubule disorganization, and molecular modeling studies suggests a potential mechanism of action related to inhibition of topoisomerases and/or hPKM2 activities. Cell morphology, pyknotic nuclei presence, cleaved caspase-3 staining and viability assays using caspase-3 inhibitors demonstrate compound 16 g induced cell death through apoptosis. Among the 35 synthesized triazole naphthoquinones, compound 16 g was the most effective compound against OSCC cells, presenting high cytotoxicity (~35 μM), selectivity (SI ~ 6) and low acute toxicity on animals, and therefore might be considered for future cancer therapy.
Synthesis, antiproliferative, docking and DFT studies of benzimidazole derivatives as EGFR inhibitors
Alam, Mohammad Mahboob,Alzahrani, Hessah Abdullah,Elhenawy, Ahmed A.,Malebari, Azizah M.,Nazreen, Syed
, (2022/01/04)
In the present work, new benzimidazole linked 1,2,3-triazole hybrids have been synthesized and screened for antiproliferative and EGFR kinase inhibitory activities.The structures of these hybrids were elucidated using IR, NMR, mass spectrometry and elemen
Structural and Activity Relationships of 6-Sulfonyl-8-Nitrobenzothiazinones as Antitubercular Agents
Chiarelli, Laurent R.,Fan, Dongguang,Han, Quanquan,Lu, Yu,Qiao, Chunhua,Shi, Rui,Stelitano, Giovanni,Wang, Bin,Huszár, Stanislav,Miku?ová, Katarína,Savková, Karin
supporting information, p. 14526 - 14539 (2021/10/26)
The benzothiazinone (BTZ) scaffold compound PBTZ169 kills Mycobacterium tuberculosis by inhibiting the essential flavoenzyme DprE1, consequently blocking the synthesis of the cell wall component arabinans. While extraordinarily potent against M. tuberculosis with a minimum inhibitory concentration (MIC) less than 0.2 ng/mL, its low aqueous solubility and bioavailability issues need to be addressed. Here, we designed and synthesized a series of 6-methanesulfonyl substituted BTZ analogues; further exploration introduced five-member aromatic heterocycles as linkers to attach an aryl group as the side chain. Our work led to the discovery of a number of BTZ derived compounds with potent antitubercular activity. The optimized compounds 6 and 38 exhibited MIC 47 and 30 nM, respectively. Compared to PBTZ169, both compounds displayed increased aqueous solubility and higher stability in human liver microsomes. This study suggested that an alternative side-chain modification strategy could be implemented to improve the druglike properties of the BTZ-based compounds.
