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Bhat AR, Patel R. Exploring the binding mechanism and esterase-like activity of human serum albumin with levofloxacin and its choline based conjugates: A biophysical approach. Int J Biol Macromol 2024; 274:133011. [PMID: 38852730 DOI: 10.1016/j.ijbiomac.2024.133011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 06/05/2024] [Accepted: 06/06/2024] [Indexed: 06/11/2024]
Abstract
Human serum albumin (HSA) effectively binds to compounds having different molecular weight and thus facilitates their distribution in the living organisms. Thus, the binding interactions between a potential antibacterial drug (levofloxacin) and synthesized choline based levofloxacinate conjugates with HSA have been explored. The binding efficacy and mechanism were explored by utilizing different spectroscopic techniques; UV-Visible, steady state fluorescence, time resolved fluorescence and esterase-like activity. The interactions between the ligands and protein were electrostatic as well as hydrophobic in nature. The influence of different ligands having different alkyl chain shows quenching of the fluorescence emission of HSA. The spontaneous binding/quenching of HSA with ligands was static in nature, validated by steady state and time resolved fluorescence spectroscopy. Also, the impact of these ligands on the conformation of the native HSA structure was evaluated by using circular dichroism spectroscopy. In combination to the structural change study, the native protein functionality was observed (in terms of 'esterase-like activity') which has been found to be on lower side due to ligand binding. Further, we have performed the reverse study to check the impact of HSA on the fluorescent fluoroquinolone drug. The current study may prove helpful in elucidating the chemico-biological interactions which may prove useful in the pharmaceuticals, pharmacology, and different biochemistry fields.
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Affiliation(s)
- Ab Raouf Bhat
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Rajan Patel
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India.
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Yadav S, Sewariya S, Singh P, Chandra R, Jain P, Kumari K. Analytic and In Silico Methods to Understand the Interactions between Dinotefuran and Haemoglobin. Chem Biodivers 2024:e202400495. [PMID: 38838069 DOI: 10.1002/cbdv.202400495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 06/04/2024] [Accepted: 06/05/2024] [Indexed: 06/07/2024]
Abstract
This work lies in the growing concern over the potential impacts of pesticides on human health and the environment. Pesticides are extensively used to protect crops and control pests, but their interaction with essential biomolecules like haemoglobin (Hb) remains poorly understood. Spectrofluorometric, electrochemical, and in silico investigations have been chosen as potential methods to delve into this issue, as they offer valuable insights into the molecular-level interactions between pesticides and haemoglobin. The research aims to address the gaps in knowledge and contribute to developing safer and more sustainable pesticide practices. The interaction was studied by spectroscopic techniques (UV-Visible & Fluorescence), in silico studies (molecular docking & molecular dynamics simulations) and electrochemical techniques (cyclic voltammetry and tafel). The studies showed effective binding of dinotefuran with the Hb which will cause toxicity to human. The formation of a stable molecular complex between ofloxacin and Haemoglobin was shown via molecular docking and the binding energy was found to be -5.37 kcal/mol. Further, molecular dynamics simulations provide an insight for the stability of the complex (Hb-dinotefuran) for a span of 250 ns with a binding free energy of -53.627 kJ/mol. Further, cyclic voltammetry and tafel studies show the interaction of dinotefuran with Hb effectively.
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Affiliation(s)
- Sandeep Yadav
- Department of Chemistry, Atma Ram Sanatan Dharma College, University of Delhi, New Delhi, India
- Department of Chemistry, SRM Institute of Science & Technology, Delhi-NCR Campus, Modinagar, Ghaziabad, India
| | - Shubham Sewariya
- Department of Chemistry, University of Delhi, Delhi, India
- School of Pharmacy and Biomedical Sciences, University of Central Lancashire, Preston, United Kingdom
| | - Prashant Singh
- Department of Chemistry, Atma Ram Sanatan Dharma College, University of Delhi, New Delhi, India
- Department of Chemistry, SRM Institute of Science & Technology, Delhi-NCR Campus, Modinagar, Ghaziabad, India
| | - Ramesh Chandra
- Department of Chemistry, University of Delhi, Delhi, India
| | - Pallavi Jain
- Department of Chemistry, SRM Institute of Science & Technology, Delhi-NCR Campus, Modinagar, Ghaziabad, India
| | - Kamlesh Kumari
- Department of Zoology, University of Delhi, Delhi, India
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Raouf Bhat A, Ud Din Parray M, Imtiyaz K, Moshahid Alam Rizvi M, Patel R. Interaction and antibacterial activity of ciprofloxacin with choline based ionic liquid and CTAB: A comparative spectroscopic study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 309:123770. [PMID: 38157746 DOI: 10.1016/j.saa.2023.123770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 11/21/2023] [Accepted: 12/12/2023] [Indexed: 01/03/2024]
Abstract
In this study, the complexation of potential chemo-therapeutic antibacterial drug, ciprofloxacin (CIP) with varying concentrations of surface active compounds (SACs) i.e., (N-(2-hydroxyethyl)-N,N-dimethyl-1-dodecanaminium bromide (12Cho.Br) and cetyltrimethylammonium bromide (CTAB) has been studied. Multispectroscopic techniques were exploited to carry out the study. The higher binding constant (Kb) value for CIP-CTAB than CIP-12Cho.Br obtained from fluorescence data revealed stronger binding of CTAB than 12Cho.Br, owing to the stronger hydrophobic-hydrophobic interaction betweeen CIP and CTAB compared to CIP and 12Cho.Br. The time resolve fluorescence decay shows changes in average lifetime (τavg) with the increasing concentration of 12Cho.Br and CTAB. The changes in τavg suggests that complex formation is taking place between CIP and 12Cho.Br / CTAB. Further, the formation of micelles by 12Cho.Br / CTAB and the effect of alkyl chain length was studied by dynamic light scattering (DLS) and zeta potential to confirm the drug complexation with 12Cho.Br and CTAB. The antibacterial activity has been performed for CIP and 12Cho.Br and CTAB. It was observed that in presence of lower concentrations of 12Cho.Br/ CTAB, the activity of the drug increased. The activity was also found cationic alkyl chain length dependent. Moreover, in-vitro cytotoxicity of CIP and its combinations with 12Cho.Br and CTAB was performed using MTT assay on HEK293 (Human embryonic kidney cells).
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Affiliation(s)
- Ab Raouf Bhat
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Mehraj Ud Din Parray
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Khalid Imtiyaz
- Department of Biosciences, Jamia Millia Islamia, New Delhi, India
| | | | - Rajan Patel
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India.
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Siddiquee A, Parray Z, Anand A, Tasneem S, Hasan N, Alamier WM, Ageeli AA, Wani FA, Singh P, Patel R. Binding Study of Antibacterial Drug Ciprofloxacin with Imidazolium-Based Ionic Liquids Having Different Halide Anions: A Spectroscopic and Density Functional Theory Analysis. ACS OMEGA 2023; 8:42699-42710. [PMID: 38024745 PMCID: PMC10653064 DOI: 10.1021/acsomega.3c05100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 12/01/2023]
Abstract
Herein, we have shown the interaction of an antibiotic drug ciprofloxacin (CIP) with three surface-active ionic liquids (ILs), having the same cation and different anions, namely, 1-decyl-3-methylimidazoliumtetrafluoroborate [C10mim][BF4], 1-decyl-3-methylimidazolium bromide [C10mim][Br], and 1-decyl-3-methylimidazolium chloride [C10mim][Cl]. This study has been performed by exploiting various spectroscopic techniques such as steady-state fluorescence, time-resolved fluorescence, and UV-visible spectroscopy. The fluorescence emission study of CIP with ILs was performed at various concentrations of all the three ILs. The emission spectra of CIP decreased in the presence of ILs, suggesting complex formation between CIP-IL. The effect of different concentrations of ILs on the emission spectra of CIP was exploited in terms of quenching and binding parameters. Further, fluorescence emission study was validated by the time-resolved fluorescence technique by measuring the average lifetime (τavg) of CIP in the presence of all the three ILs. The τavg value of the drug changed with the addition of ILs, which suggests complex formation between the drug and ILs. This complex formation was also confirmed by UV-visible spectroscopy results of CIP with all the three ILs. Further, for evaluating the thermodynamic parameters of the CIP-IL interactions, isothermal titration calorimetry (ITC) was performed. The ITC experiment yielded the thermodynamic parameters, ΔH (change in the enthalpy of association), ΔG (Gibbs free energy change), ΔS (entropy change), and binding constant (Ka). The binding parameters driven by ITC revealed that CIP-IL interactions are spontaneous in nature and enthalpy-driven, involving hydrophobic forces. Further, the classical density functional theory (DFT) calculations were performed, which provided deep insight for CIP-IL complex formation.
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Affiliation(s)
- Abrar Siddiquee
- Biophysical
Chemistry Laboratory, Centre for Interdisciplinary Research in Basic
Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Zahoor Parray
- Department
of Chemistry, IIT Delhi, Hauz Khaus Campus, New Delhi 110016, India
| | - Aashima Anand
- Biophysical
Chemistry Laboratory, Centre for Interdisciplinary Research in Basic
Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Shadma Tasneem
- Department
of Chemistry, Faculty of Science, Jazan
University, P.O. Box 2097, Jazan 45142, Saudi Arabia
| | - Nazim Hasan
- Department
of Chemistry, Faculty of Science, Jazan
University, P.O. Box 2097, Jazan 45142, Saudi Arabia
| | - Waleed M. Alamier
- Department
of Chemistry, Faculty of Science, Jazan
University, P.O. Box 2097, Jazan 45142, Saudi Arabia
| | - Abeer A. Ageeli
- Department
of Chemistry, Faculty of Science, Jazan
University, P.O. Box 2097, Jazan 45142, Saudi Arabia
| | - Farooq Ahmad Wani
- Biophysical
Chemistry Laboratory, Centre for Interdisciplinary Research in Basic
Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Prashant Singh
- Department
of Chemistry, ARSD College, Delhi University, New Delhi 110021, India
| | - Rajan Patel
- Biophysical
Chemistry Laboratory, Centre for Interdisciplinary Research in Basic
Sciences, Jamia Millia Islamia, New Delhi 110025, India
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