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Rahman A, Sandeep Kumar Jain R, Meghana P, Nippu BN, Manjunatha KS, Rajaput PS, Kumaraswamy HM, Satyanarayan ND. Tetrahydrobenzothiophene derivatives ameliorate Mia PaCa-2 cell progression and induces apoptosis via inhibiting EGFR2 tyrosine kinase signal. Bioorg Chem 2024; 143:106968. [PMID: 38007893 DOI: 10.1016/j.bioorg.2023.106968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/28/2023] [Accepted: 11/12/2023] [Indexed: 11/28/2023]
Abstract
A series of new thiophene analogues with acarbonitrile-basedmoiety were designed and synthesized via structural optimization. The conjugates were assessed for their in-vitro cytotoxic activity against a human pancreatic cancer cell line (Mia PaCa-2) and among them compound 5b showed IC50 value of 13.37 ± 2.37 μM. The compounds 5b (20 µM & 25 µM) and 7c (30 & 35 µM) also showed reduced clonogenicity, enhanced ROS and decreased mitochondrial membrane potential in Mia PaCa-2 cells. Treatment with these compounds also increased apoptotic population as evident with the double staining assay. Among the evaluated series, compounds 5b, 5g, 7c, and 9a attained a greater inhibitory potency than first generation's reversible EGFR inhibitor, Gefitinib. EGFR2 enzyme inhibitory studies revealed that 5b efficiently and arbitrarily suppressed the development of EGFR2 dependent cells and inhibited the enzymatic activity with an IC50 value of 0.68 µM; interestingly, the most effective molecule 5b with N-methyl piperazine substitution, has 1.29-fold greater potency than well-known EGFR inhibitor Gefitinib and increased Gefitinib's anti-growth impact with 2.04 folds greater against Mia PaCa-2. The in-vitro studies were validated with in-silico docking studies wherein compounds 5b and 7c exhibited binding energies of -8.2 and -7.4 Kcal/mol respectively. The present study reveals that tetrahydrobenzothiophene based analogues could be a promising lead for the evolution of potent chemo preventives over pancreatic cancer.
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Affiliation(s)
- Abdul Rahman
- Department of Pharmaceutical Chemistry, Kuvempu University, Post Graduate Centre, Kadur, Chikkamagaluru, Karnataka 577548, India
| | - R Sandeep Kumar Jain
- Laboratory of Experimental Medicine, Department of Biotechnology, Kuvempu University, Shankargatta, Shimoga, Karnataka 577451, India
| | - P Meghana
- Laboratory of Experimental Medicine, Department of Biotechnology, Kuvempu University, Shankargatta, Shimoga, Karnataka 577451, India
| | - B N Nippu
- Department of Pharmaceutical Chemistry, Kuvempu University, Post Graduate Centre, Kadur, Chikkamagaluru, Karnataka 577548, India
| | - K S Manjunatha
- Department of Pharmaceutical Chemistry, Kuvempu University, Post Graduate Centre, Kadur, Chikkamagaluru, Karnataka 577548, India
| | - Pooja S Rajaput
- Laboratory of Experimental Medicine, Department of Biotechnology, Kuvempu University, Shankargatta, Shimoga, Karnataka 577451, India
| | - H M Kumaraswamy
- Laboratory of Experimental Medicine, Department of Biotechnology, Kuvempu University, Shankargatta, Shimoga, Karnataka 577451, India
| | - N D Satyanarayan
- Department of Pharmaceutical Chemistry, Kuvempu University, Post Graduate Centre, Kadur, Chikkamagaluru, Karnataka 577548, India.
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Kumaraswamy HM, Krishna V, Sharath R, Satyanarayan ND, Meghana P, Jain RSK, Prashanth N, Raja Naika H. Potential role of embelin in the prevention of Freund's adjuvant induced inflammation and ROS. 3 Biotech 2022; 12:10. [PMID: 34966633 PMCID: PMC8655053 DOI: 10.1007/s13205-021-03071-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 11/22/2021] [Indexed: 01/03/2023] Open
Abstract
Inflammation is a complex biological response involving immune cells to an infection creating injury to the normal tissues. The anti-inflammatory efficacy of embelin, a benzoquinone from the plant Embelia ribes, was screened for antioxidant and anti-inflammatory activity in carrageenan and Freund's adjuvant-induced inflammation models. Embelin exhibited significant dose-dependent antioxidant potential. In carrageenan-induced inflammation, embelin (20 mg/kg) showed an inhibition of oedema by 71.01 ± 0.12% and 81.91 ± 0.67% in Freund's adjuvant-treated chronic inflammation model and resulted in a noticeable increase in adrenal size and restoration of the weight of spleen. Embelin also demonstrated cytoprotective effects on HEK-293 cells under induced oxidative stress. In silico analysis, embelin demonstrated binding energy of - 7.7 kcal/Mol and - 7.0 kcal/Mol with COX1 and COX2 with two hydrogen bonds. These results further prove that embelin could be a promising anti-inflammatory agent and supports the traditional use of Embelia ribes for rheumatism.
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Affiliation(s)
- H. M. Kumaraswamy
- grid.440695.a0000 0004 0501 6546Laboratory of Experimental Medicine, Department of Biotechnology, Kuvempu University, Shimoga, Shankarghatta, Karnataka 577451 India
| | - V. Krishna
- grid.440695.a0000 0004 0501 6546Laboratory of Experimental Medicine, Department of Biotechnology, Kuvempu University, Shimoga, Shankarghatta, Karnataka 577451 India
| | - R. Sharath
- grid.449028.30000 0004 1773 8378Department of Food Technology, Davangere University, Shivagangothri, Davangere, Karnataka 577002 India
| | - N. D. Satyanarayan
- grid.440695.a0000 0004 0501 6546Department of Studies and Research in Pharmaceutical Chemistry, Kuvempu University P.G Centre, Kadur, Karnataka 577548 India
| | - P. Meghana
- grid.440695.a0000 0004 0501 6546Laboratory of Experimental Medicine, Department of Biotechnology, Kuvempu University, Shimoga, Shankarghatta, Karnataka 577451 India
| | - R. Sandeep Kumar Jain
- grid.440695.a0000 0004 0501 6546Laboratory of Experimental Medicine, Department of Biotechnology, Kuvempu University, Shimoga, Shankarghatta, Karnataka 577451 India
| | - N. Prashanth
- grid.440695.a0000 0004 0501 6546Laboratory of Experimental Medicine, Department of Biotechnology, Kuvempu University, Shimoga, Shankarghatta, Karnataka 577451 India
| | - H. Raja Naika
- grid.412825.80000 0004 1756 5761Department of Biotechnology, Tumkur University, Tumkur, Karnataka 572103 India
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Prabhakara MC, Naik HSB, Krishna V, Kumaraswamy HM. Binding and oxidative cleavage studies of DNA by mixed ligand Co(III) and Ni(II) complexes of quinolo [3,2-b]benzodiazapine and 1,10-phenanthroline. Nucleosides Nucleotides Nucleic Acids 2007; 26:459-71. [PMID: 17578744 DOI: 10.1080/15257770701426237] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Two mixed ligand complexes of the type [M(phen)(2)(qbdp)](PF(6))n.xH(2)O where M = Co(III) and Ni(II), qbdp = quinolo[3,2-b] benzodiazepine and phen = 1,10-phenanthroline, n = 3 or 2, x = 2 or 3 have been synthesized and characterized by employing analytical and spectral methods. The DNA binding property of the complexes with calf thymus-DNA has been investigated by using absorption spectra, viscosity measurements as well as thermal denaturation studies. The absorption spectral results indicate that the Co(III) and Ni(II) complexes intercalate between the base pairs of the DNA tightly with intrinsic DNA binding constant of 6.4 x 10(4) and 4.8 x 10(4) M(-1) in Tris HCl buffer containing 50 mM NaCl, respectively. The large enhancement in the relative viscosity of DNA on binding to the quinolo [3,2-b] benzodiazepine supports the proposed DNA binding modes. The complexes on reaction with super coiled (SC) DNA shows nuclease activity.
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Affiliation(s)
- M C Prabhakara
- Department of P.G. Studies and Research in Industrial Chemistry, School of Chemical Sciences, Kuvempu University. Shankaraghatta, Karnataka. India
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