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Taha M, Ismail NH, Imran S, Selvaraj M, Rahim F. Synthesis of novel inhibitors of β-glucuronidase based on the benzothiazole skeleton and their molecular docking studies. RSC Adv 2016. [DOI: 10.1039/c5ra23072a] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Benzothiazole derivatives (1–20) were evaluated for β-glucuronidase inhibitory activity.
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52
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Taha M, Ismail NH, Imran S, Anouar EH, Ali M, Jamil W, Uddin N, Kashif SM. Identification of bisindolylmethane–hydrazone hybrids as novel inhibitors of β-glucuronidase, DFT, and in silico SAR intimations. RSC Adv 2016. [DOI: 10.1039/c5ra19513f] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synthesis and β-glucuronidase inhibition activity of novel bisindolylmethane derivatives (1–30).
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53
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Taha M, Ismail NH, Imran S, Wadood A, Ali M, Rahim F, Khan AA, Riaz M. Novel thiosemicarbazide–oxadiazole hybrids as unprecedented inhibitors of yeast α-glucosidase and in silico binding analysis. RSC Adv 2016. [DOI: 10.1039/c5ra28012e] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel hybrids of thiosemicarbazide–oxadiazole as potent α-glucosidase agents.
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54
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Imran S, Taha M, Ismail N. A Review of Bisindolylmethane as an Important Scaffold for Drug Discovery. Curr Med Chem 2015; 22:4412-33. [DOI: 10.2174/0929867322666151006093930] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 09/11/2015] [Accepted: 10/05/2015] [Indexed: 11/22/2022]
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55
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Taha M, Ismail NH, Imran S, Selvaraj M, Rahim A, Ali M, Siddiqui S, Rahim F, Khan KM. Synthesis of novel benzohydrazone–oxadiazole hybrids as β-glucuronidase inhibitors and molecular modeling studies. Bioorg Med Chem 2015; 23:7394-404. [DOI: 10.1016/j.bmc.2015.10.037] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 10/22/2015] [Accepted: 10/24/2015] [Indexed: 11/27/2022]
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56
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Imran S, Taha M, Ismail NH, Kashif SM, Rahim F, Jamil W, Wahab H, Khan KM. Synthesis,In vitroand Docking Studies of New Flavone Ethers asα-Glucosidase Inhibitors. Chem Biol Drug Des 2015; 87:361-73. [DOI: 10.1111/cbdd.12666] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 08/24/2015] [Accepted: 09/07/2015] [Indexed: 12/20/2022]
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57
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Taha M, Ismail NH, Imran S, Wadood A, Rahim F, Riaz M. Synthesis of potent urease inhibitors based on disulfide scaffold and their molecular docking studies. Bioorg Med Chem 2015; 23:7211-8. [DOI: 10.1016/j.bmc.2015.10.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 10/12/2015] [Accepted: 10/12/2015] [Indexed: 12/12/2022]
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58
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Imran S, Taha M, Ismail NH, Kashif SM, Rahim F, Jamil W, Hariono M, Yusuf M, Wahab H. Synthesis of novel flavone hydrazones: in-vitro evaluation of α-glucosidase inhibition, QSAR analysis and docking studies. Eur J Med Chem 2015; 105:156-70. [PMID: 26491979 DOI: 10.1016/j.ejmech.2015.10.017] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 09/08/2015] [Accepted: 10/07/2015] [Indexed: 11/28/2022]
Abstract
Thirty derivatives of flavone hydrazone (5-34) had been synthesized through a five-step reaction and screened for their α-glucosidase inhibition activity. Chalcone 1 was synthesized through aldol condensation then subjected through oxidative cyclization, esterification, and condensation reaction to afford the final products. The result for baker's yeast α-glucosidase (EC 3.2.1.20) inhibition assay showed that all compounds are active with reference to the IC50 value of the acarbose (standard drug) except for compound 3. Increase in activity observed for compounds 2 to 34 clearly highlights the importance of flavone, hydrazide and hydrazone linkage in suppressing the activity of α-glucosidase. Additional functional group on N-benzylidene moiety further enhances the activity significantly. Compound 5 (15.4 ± 0.22 μM), a 2,4,6-trihydroxy substituted compound, is the most active compound in the series. Other compounds which were found to be active are those having chlorine, fluorine, and nitro substituents. Compounds with methoxy, pyridine, and methyl substituents are weakly active. Further studies showed that they are not active in inhibiting histone deacetylase activity and do not possess any cytotoxic properties. QSAR model was being developed to further identify the structural requirements contributing to the activity. Using Discovery Studio (DS) 2.5, various 2D descriptors were being used to develop the model. The QSAR model is able to predict the pIC50 and could be used as a prediction tool for compounds having the same skeletal framework. Molecular docking was done for all compounds using homology model of α-glucosidase to identify important binding modes responsible for inhibition activity.
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Taha M, Ismail NH, Imran S, Selvaraj M, Rashwan H, Farhanah FU, Rahim F, Kesavanarayanan KS, Ali M. Synthesis of benzimidazole derivatives as potent β-glucuronidase inhibitors. Bioorg Chem 2015; 61:36-44. [DOI: 10.1016/j.bioorg.2015.05.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 05/25/2015] [Accepted: 05/27/2015] [Indexed: 11/24/2022]
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60
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Taha M, Ismail NH, Imran S, Rokei MQB, Saad SM, Khan KM. Synthesis of new oxadiazole derivatives as α-glucosidase inhibitors. Bioorg Med Chem 2015; 23:4155-4162. [DOI: 10.1016/j.bmc.2015.06.060] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 06/23/2015] [Indexed: 12/15/2022]
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61
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Rehman A, Imran S, Hassan M, Akhlaq A, Iqbal S, Beg F, Zahid G, Khalid H, Qadir FS, Murad HF, Baloch NUA, Awais M, Saleem S. Taxi drivers' attitudes toward road safety in Pakistan. Public Health 2015; 129:818-21. [PMID: 25936972 DOI: 10.1016/j.puhe.2015.03.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 02/23/2015] [Accepted: 03/18/2015] [Indexed: 11/28/2022]
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62
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Taha M, Ismail NH, Khan A, Shah SAA, Anwar A, Halim SA, Fatmi MQ, Imran S, Rahim F, Khan KM. Synthesis of novel derivatives of oxindole, their urease inhibition and molecular docking studies. Bioorg Med Chem Lett 2015; 25:3285-9. [PMID: 26077497 DOI: 10.1016/j.bmcl.2015.05.069] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 05/21/2015] [Accepted: 05/23/2015] [Indexed: 11/16/2022]
Abstract
We synthesized a series of novel 5-24 derivatives of oxindole. The synthesis started from 5-chlorooxindole, which was condensed with methyl 4-carboxybezoate and result in the formation of benzolyester derivatives of oxindole which was then treated with hydrazine hydrate. The oxindole benzoylhydrazide was treated with aryl acetophenones and aldehydes to get target compounds 5-24. The synthesized compounds were evaluated for urease inhibition; the compound 5 (IC50 = 13.00 ± 0.35 μM) and 11 (IC50 = 19.20 ± 0.50 μM) showed potent activity as compared to the standard drug thiourea (IC50 = 21.00 ± 0.01 μM). Other compounds showed moderate to weak activity. All synthetic compounds were characterized by different spectroscopic techniques including (1)H NMR, (13)C NMR, IR and EI MS. The molecular interactions of the active compounds within the binding site of urease enzyme were studied through molecular docking simulations.
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63
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Taha M, Ismail NH, Imran S, Wadood A, Rahim F, Ali M, Rehman AU. Novel quinoline derivatives as potent in vitro α-glucosidase inhibitors: in silico studies and SAR predictions. MEDCHEMCOMM 2015. [DOI: 10.1039/c5md00280j] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new series of exceptionally potent quinoline derivatives 6–30 as α-glucosidase inhibitors was identified.
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Akhtar R, Sardar M, Saima N, Saleem G, Imran S, Aslam A. Responses of Nili-Ravi buffalo to aflatoxin B1 with and without toxin adsorbents. JOURNAL OF ANIMAL AND FEED SCIENCES 2014. [DOI: 10.22358/jafs/65667/2014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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65
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Imran S, Nicholl R. Neonatal respiratory distress: do not forget the rarer causes! CASE REPORTS 2009; 2009:bcr03.2009.1669. [DOI: 10.1136/bcr.03.2009.1669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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66
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Imran S, Gorman F. Occurence of Candida infections in the neonatal intensive care unit. IRISH MEDICAL JOURNAL 2004; 97:185-6. [PMID: 15305625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
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67
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Aaronson JS, Eckman B, Blevins RA, Borkowski JA, Myerson J, Imran S, Elliston KO. Toward the development of a gene index to the human genome: an assessment of the nature of high-throughput EST sequence data. Genome Res 1996; 6:829-45. [PMID: 8889550 DOI: 10.1101/gr.6.9.829] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A rigorous analysis of the Merck-sponsored EST data with respect to known gene sequences increases the utility of the data set and helps refine methods for building a gene index. A highly curated human transcript data base was used as a reference data set of known genes. A detailed analysis of EST sequences derived from known genes was performed to assess the accuracy of EST sequence annotation. The EST data was screened to remove low-quality and low-complexity sequences. A set of high-quality ESTs similar to the transcript data base was identified using BLAST; this subset of ESTs was compared with the set of known genes using the Smith-Waterman algorithm. Error rates of several types were assessed based on a flexible match criterion defining sequence identity. The rate of lane-tracking errors is very low, approximately 0.5%. Insert size data is accurate within approximately 20%. Reversed clone and internal priming error rates are approximately 5% and 2.5%, respectively, contributing to the incorrect identification of reads as 3' ends of genes. Follow-up investigation reveals that a significant number of clones, miscategorized as reversed, represent overlapping genes on the opposite strand of entries in the transcript data base. Relevance of these results to the creation of a high-quality index to the human genome capable of supporting diverse genomic investigations is discussed.
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