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Identification of Potent Cholecystokinin-B Receptor Antagonists: Synthesis, Molecular Modeling and anti-cancer activity against Pancreatic Cancer Cells.

Abstract

Advanced malignant stage of pancreatic cancer has poor prognosis and very few treatment strategies are available. Pancreatic cancer is known to possess unique growth-related receptors that when activated stimulate tumour proliferation. Gastrin and its related peptide cholecystokinin (CCK) are also significantly involved with growth of this cancer type as well as other malignancies through activation of the cholecystokinin-B receptor (CCK-BR). New treatment strategies with CCK-BR antagonists are being suggested that suppress the growth promoting effects of gastrin. In this paper, we report development of two series of quinazolinonederivatives incorporating hydrazinecarbothioamide (compounds 3a-g) and hydrazino group (Compounds 4a-e) as linkers for developing CCK-BR antagonists. The affinities of the compounds were determined using docking into CCK-BR homology modeled structure. The compounds were tested for in vitro CCK-BR binding and gastric acid secretion in an isolated lumen-perfused mouse stomach assay. The compounds exhibited CCK-BR binding activity (IC50) in the range of 0.2 – 975 nM and showed good gastric acid secretion inhibitory activity. Molecular modeling of the compounds was done and pharmacophore mapping results showed good prediction of in vitro activity which correlated well with the experimental antagonistic activity. The compounds were further tested for their cytotoxicity on CCK-BR expressing pancreatic cancer cells. The results of the study provided two potent CCK-BR antagonists which also possess good to moderate growth inhibitory activities against pancreatic cancer cells.

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Publication details

The article was received on 07 Apr 2017, accepted on 02 Jun 2017 and first published on 14 Jun 2017


Article type: Research Article
DOI: 10.1039/C7MD00171A
Citation: Med. Chem. Commun., 2017, Accepted Manuscript
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    Identification of Potent Cholecystokinin-B Receptor Antagonists: Synthesis, Molecular Modeling and anti-cancer activity against Pancreatic Cancer Cells.

    S. Kumari, J. Chowdhary, M. Sikka, P. Verma, P. Jha, A. K. Mishra, D. Saluja and M. Chopra, Med. Chem. Commun., 2017, Accepted Manuscript , DOI: 10.1039/C7MD00171A

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