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Mangangcha IR, Brojen Singh RK, Lebeche D, Ali S. Xanthone glucoside 2-β-D-glucopyranosyl-1,3,6,7-tetrahydroxy-9H-xanthen-9-one binds to the ATP-binding pocket of glycogen synthase kinase 3β and inhibits its activity: implications in prostate cancer and associated cardiovascular disease risk. J Biomol Struct Dyn 2021; 40:7868-7884. [PMID: 33769184 DOI: 10.1080/07391102.2021.1902857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Glycogen synthase kinase 3 (GSK3) is a serine/threonine kinase which in the presence of ATP in its ATP-binding pocket transfers a phosphate to a primed substrate. GSK3β is an isoform of GSK3 which has been projected as a potent therapeutic target in human diseases including cancers and metabolic syndrome. Incidentally, cardiovascular disease is a common cause of non-cancer related deaths in prostate cancer (PCa) patients, mainly due to the effects of androgen-deprivation therapy (ADT), a mainstay for PCa treatment. Several small molecular inhibitors of GSK3 are either ATP-competitive (bind to the ATP-binding pocket), or non-ATP-competitive inhibitors (binding to the substrate-binding site of the enzyme). In this study, 2-β-D-glucopyranosyl-1,3,6,7-tetrahydroxy-9H-xanthen-9-one (βDGT), a natural xanthonoid present in many plant species, is reported to bind to the ATP-binding pocket of GSK3β and inhibit its activity, as demonstrated by the molecular docking and molecular dynamics simulation analysis and experimental validation in vitro. A comparison of the binding affinities with five known ATP-competitive inhibitors of GSK3β suggested similarity in binding site residues in the ATP-binding pocket of the enzyme. The optimum inhibitory concentration of the xanthonoid as determined by the luminescent kinase assay was 200 µM. The study envisages the use of βDGT as a natural ATP-competitive inhibitor of GSK3β and implicates its use in PCa patients on ADT, a cardiovascular disease risk, and other pathological conditions where GSK3 inhibition may be clinically important. HighlightsGSK3β is a multifaceted kinase known for its role in cancers, cardiovascular, and other diseases.In this study, βDGT, a xanthonoid, is reported to bind to the ATP-binding pocket of GSK3β.A comparison of βDGT binding with 5 known ATP-competitive inhibitors of GSK3β suggested the involvement of residues at the ATP binding site.The binding site analysis suggested an ATP-competitive mechanism of enzyme inhibition.Study envisages the use of βDGT as a natural ATP-competitive inhibitor of GSK3β and implicates its use in prostate cancer patients on androgen-deprivation therapy, a cardiovascular disease risk, and other pathological conditions.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Irengbam Rocky Mangangcha
- Department of Biochemistry, School of Chemical and Life Sciences, Jamia Hamdard (Deemed University), Delhi, India.,School of Interdisciplinary Sciences and Technology, Jamia Hamdard (Deemed University), Delhi, India.,Bioinformatics Center, BIF, Jamia Hamdard (Deemed University), Delhi, India.,Department of Zoology, Deshbandhu College, University of Delhi, Delhi, India
| | - Raj Kumar Brojen Singh
- School of Computational & Integrative Sciences, Jawaharlal Nehru University, Delhi, India
| | - Djamel Lebeche
- Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Diabetes, Obesity and Metabolism Institute, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Shakir Ali
- Department of Biochemistry, School of Chemical and Life Sciences, Jamia Hamdard (Deemed University), Delhi, India.,School of Interdisciplinary Sciences and Technology, Jamia Hamdard (Deemed University), Delhi, India.,Bioinformatics Center, BIF, Jamia Hamdard (Deemed University), Delhi, India
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Khan B, Naiyer A, Athar F, Ali S, Thakur SC. Synthesis, characterization and anti-inflammatory activity evaluation of 1,2,4-triazole and its derivatives as a potential scaffold for the synthesis of drugs against prostaglandin-endoperoxide synthase. J Biomol Struct Dyn 2020; 39:457-475. [PMID: 31900051 DOI: 10.1080/07391102.2019.1711193] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Substituted 1,2,4-triazole nucleus is common in several drugs used in a variety of clinical conditions including infections, hypoglycemia, hypertension and cancer. In this study, we synthesized 1,2,4-triazole and its 16 hydrazone derivatives (B1-B16), characterized them by IR, NMR and Mass spectroscopy, and evaluated their radical scavenging and anti-inflammatory activities in vitro and in vivo. Out of 16 derivatives, five (B1, B5, B6, B9, and B13) demonstrated a significant radical scavenging and anti-inflammatory activity in vitro. B6, which possessed two electron-donating hydroxyl groups, was most active among all. Molecular docking and MD simulation of the complex of B6 with prostaglandin-endoperoxide synthase (PTGS) or cyclooxygenase (COX) showed that B6 occupied celecoxib binding site in COX with high affinity (the binding free energy of the complex with COX-1 was -10.5, and -11.2 kcal/mol with COX-2). Maximum anti-inflammatory activity was also shown by the B6 derivative in vivo, in the rat model of carrageenan-induced inflammation. B6, along with four other derivatives (B1, B5, B9 and B13) exhibited 80-90% free radical scavenging activity. The IC50 values of these compounds were ≥40 µM. Griess nitrite and dichloro-dihydro-fluorescein-diacetate assays suggested a significant inhibition of nitric oxide and reactive oxygen species, especially by B6 and B9. Taken together, out of 16 derivatives, B6 is reported to have highest anti-inflammatory and antioxidant activity at a low dose level, which may be attributed to its two electron-donating hydroxyls. B6 is proposed to be an important scaffold for the synthesis of new drugs against PTGS for use in a myriad of inflammatory and infectious diseases.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Bushra Khan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Abdullah Naiyer
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Fareeda Athar
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Shakir Ali
- Department of Biochemistry, School of Chemical and Life Sciences & DBT BTISNet Bioinformatics infrastructure facility, BIF, Jamia Hamdard, New Delhi, India
| | - Sonu Chand Thakur
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
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