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Mohanty S, Mishra SS, Kuldeep, Maharana J, Subuddhi U. Insight into the Effect of Submicellar Concentrations of Sodium Deoxycholate on the Structure, Stability, and Activity of Bovine and Human Serum Albumin: An Interesting Comparison between Single and Double Tryptophan Proteins. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:5228-5244. [PMID: 38413419 DOI: 10.1021/acs.langmuir.3c03541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The progressive escalation in the applications of bile salts in diverse fields has triggered research on their interaction with various biological macromolecules, especially with proteins. A proper understanding of the interaction process of bile salts, particularly in the lower concentrations range, with the serum albumin seems important since the normal serum concentration of bile salts is approximately in the micromolar range. The current study deals with a comprehensive and comparative analysis of the interaction of submicellar concentrations of sodium deoxycholate (NaDC) with two homologous transport proteins: bovine serum albumin (BSA) and human serum albumin (HSA). HSA and BSA with one and two tryptophans, respectively, provide the opportunity for an interesting comparison of tryptophan fluorescence behavior on interaction with NaDC. The study suggests a sequential interaction of NaDC in three discrete stages with the two proteins. A detailed study using warfarin and ibuprofen as site markers provides information about the sites of interaction, which is further confirmed by inclusive molecular dynamics simulation analysis. Moreover, the comparison of the thermodynamics and stability of the NaDC-serum albumin complexes confirms the stronger interaction of NaDC with BSA as compared to that with HSA. The differential interaction between the bile salt and the two serum albumins is further established from the difference in the extent of decrease in the esterase-like activity assay of the proteins in the presence of NaDC. Therefore, the present study provides important insight into the effect of submicellar concentrations of NaDC on the structure, stability, and activity of the two homologous serum albumins and thus can contribute not only to the general understanding of the complex nature of serum albumin-bile salt interactions but also to the design of more effective pharmaceutical formulations in the field of drug delivery and biomedical research.
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Affiliation(s)
- Subhrajit Mohanty
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Smruti Snigdha Mishra
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Kuldeep
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Jitendra Maharana
- Distributed Information Centre, Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat 785013, Assam, India
| | - Usharani Subuddhi
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
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Spectroscopic studies on binding of ibuprofen and drotaverine with bovine serum albumin. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Impact of Albumin Binding Function on Pharmacokinetics and Pharmacodynamics of Furosemide. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:medicina58121780. [PMID: 36556982 PMCID: PMC9787406 DOI: 10.3390/medicina58121780] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/26/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022]
Abstract
Background and Objectives: Albumin binding of the loop diuretic furosemide forms the basis for its transport to the kidney and subsequent tubular secretion, which is a prerequisite for its therapeutic effects. Accordingly, high albumin concentrations should result in higher efficacy of furosemide. However, study results on the combination of furosemide in conjunction with albumin, and on the efficacy of furosemide in hypoalbuminemia, did not confirm this hypothesis. The aim of this study was to determine the efficacy of furosemide not only in relation to albumin concentration, but also taking albumin function into account. Materials and Methods: In a prospective and non-interventional clinical observational trial, blood and urine samples from 50 intensive care patients receiving continuous intravenous furosemide therapy were evaluated. Albumin binding capacity (ABiC) determination allowed conclusions to be drawn about the binding site-specific loading state of albumin, by quantifying the unbound fraction of the fluorescent marker dansylsarcosine. In addition, assessment of the total concentration of furosemide in plasma and urine, as well as the concentration of free furosemide fraction in plasma, was performed by HPLC−MS. The efficacy of furosemide was evaluated by the ratio of urine excretion to fluid intake. Results: In patients with an ABiC ≥ 60% free furosemide fraction was significantly lower compared to patients with a lower ABiC (p < 0.001), urinary furosemide concentration was higher (p = 0.136), and a significantly higher proportion of infused furosemide was excreted renally (p = 0.010). ABiC was positively correlated (r = 0.908, p = 0.017) with increase in the urine excretion to fluid input ratio after initiation of furosemide therapy. Conclusions: ABiC could serve as a marker for individual response to furosemide and could be used to generate patient-specific therapeutic regimens. In view of the relatively low number of patients in this study, the relationship between furosemide efficacy and albumin function should be investigated in larger studies in the future.
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In Vitro Investigation of Binding Interactions between Albumin–Gliclazide Model and Typical Hypotensive Drugs. Int J Mol Sci 2021; 23:ijms23010286. [PMID: 35008711 PMCID: PMC8745505 DOI: 10.3390/ijms23010286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/20/2021] [Accepted: 12/26/2021] [Indexed: 11/26/2022] Open
Abstract
Type 2 diabetes management usually requires polytherapy, which increases the risk of drug-to-drug interactions. Among the multiple diabetes comorbidities, hypertension is the most prevalent. This study aimed to investigate the binding interactions between the model protein, bovine albumin, and the hypoglycemic agent gliclazide (GLICL) in the presence of typical hypotensive drugs: quinapril hydrochloride (QUI), valsartan (VAL), furosemide (FUR), amlodipine besylate (AML), and atenolol (ATN). Spectroscopic techniques (fluorescence quenching, circular dichroism) and thermodynamic experiments were employed. The binding of the gliclazide to the albumin molecule was affected by the presence of an additional drug ligand, which was reflected by the reduced binding constant of the BSA–DRUG–GLICL system. This may indicate a possible GLICL displacement and its enhanced pharmacological effect, as manifested in clinical practice. The analysis of the thermodynamic parameters indicated the spontaneity of the reaction and emphasized the role of hydrogen bonding and van der Waals forces in these interactions. The secondary structure of the BSA remained almost unaffected.
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Sadeghzadeh F, Entezari AA, Behzadian K, Habibi K, Amiri-Tehranizadeh Z, Asoodeh A, Saberi MR, Chamani J. Characterizing the Binding of Angiotensin Converting Enzyme I Inhibitory Peptide to Human Hemoglobin: Influence of Electromagnetic Fields. Protein Pept Lett 2020; 27:1007-1021. [DOI: 10.2174/1871530320666200425203636] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/18/2020] [Accepted: 02/22/2020] [Indexed: 01/28/2023]
Abstract
Background:
Drug-protein complexes is one of the crucial factors when analyzing the
pharmacokinetics and pharmacodynamics of a drug because they can affect the excretion, distribution,
metabolism and interaction with target tissues.
Objectives:
The aim of this study was to investigate the interaction of human hemoglobin (Hb) and
angiotensin I converting enzyme inhibitory peptide (ACEIP) in the absence and presence of different-
frequency electromagnetic fields (EMF).
Methods:
Various spectroscopic methods like fluorescence spectroscopy, ultraviolet, circular
dichroism and conductometry techniques were applied to investigate Hb-ACEIP interaction in the
absence and presence of EMF.
Result:
The presented spectroscopic studies indicated that EMF changed the interaction between
Hb and ACEIP. The a-helix content of Hb decreased upon binding to ACEIP and conductivity of
the solution enhanced upon binding. Based on Stern-Volmer equations, it could be stated that the
Hb-ACEIP affinity was higher in the presence of EMF.
Conclusion:
It can be concluded that for patients who use the drug to control blood pressure, a
low-frequency electromagnetic field would have a positive effect on the uptake of the drug.
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Affiliation(s)
- Farzaneh Sadeghzadeh
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Amir Arsalan Entezari
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Kiana Behzadian
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Kimia Habibi
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Zeinab Amiri-Tehranizadeh
- Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ahmad Asoodeh
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mohammad Reza Saberi
- Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Jamshidkhan Chamani
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran
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Mokaberi P, Reyhani V, Amiri-Tehranizadeh Z, Saberi MR, Beigoli S, Samandar F, Chamani J. New insights into the binding behavior of lomefloxacin and human hemoglobin using biophysical techniques: binary and ternary approaches. NEW J CHEM 2019. [DOI: 10.1039/c9nj01048c] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Demonstrates the overlap that had been induced between the fluorescence emission spectrum of Hb and the absorption spectrum of drugs, which has proved that there is a high probability to the occurrence of energy transfer from Hb and LMF in the absence and presence of NRF.
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Affiliation(s)
- Parisa Mokaberi
- Department of Biology
- Faculty of Sciences
- Mashhad Branch
- Islamic Azad University
- Mashhad
| | - Vida Reyhani
- Department of Biology
- Faculty of Sciences
- Mashhad Branch
- Islamic Azad University
- Mashhad
| | | | - Mohammad Reza Saberi
- Department of Medical Chemistry
- School of Pharmacy
- Mashhad University of Medical Sciences
- Mashhad
- Iran
| | - Sima Beigoli
- Endoscopic and Minimally Invasive Surgery Research Center
- Mashhad University of Medical Sciences
- Mashhad
- Iran
| | - Farzaneh Samandar
- Department of Biology
- Faculty of Sciences
- Mashhad Branch
- Islamic Azad University
- Mashhad
| | - Jamshidkhan Chamani
- Department of Biology
- Faculty of Sciences
- Mashhad Branch
- Islamic Azad University
- Mashhad
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Rabbani N, Tabrez S, Islam BU, Rehman MT, Alsenaidy AM, AlAjmi MF, Khan RA, Alsenaidy MA, Khan MS. Characterization of colchicine binding with normal and glycated albumin: In vitro and molecular docking analysis. J Biomol Struct Dyn 2017; 36:3453-3462. [PMID: 28990867 DOI: 10.1080/07391102.2017.1389661] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The transport of more than 90% of the drugs viz. anticoagulants, analgesics, and general anesthetics in the blood takes place by albumin. Hence, albumin is the prime protein needs to be investigated to find out the nature of drug binding. Serum albumin molecules are prone to glycation at elevated blood glucose levels as observed in diabetics. In this piece of work, glycation of bovine serum albumin (BSA) was carried out with glyceraldehyde and characterized by molecular docking and fluorometry techniques. Glycation of BSA showed 25% loss of free amino groups and decreased protein fluorescence (60%) with blue shift of 6 nm. The present study was also designed to evaluate the binding of colchicine (an anti-inflammatory drug) to native and glycated BSA and its ability to displace 8-analino-1-nephthalene sulfonic acid (ANS), from the BSA-ANS complex. Binding of ANS to BSA showed strong binding (Ka = 4.4 μM) with native conformation in comparison to glycated state (Ka = 8.4 μM). On the other hand, colchicine was able to quench the fluorescence of native BSA better than glycated BSA and also showed weaker affinity (Ka = 23 μM) for glycated albumin compared with native state (Ka = 16 μM). Molecular docking study showed that both glyceraldehyde and colchicine bind to common residues located near Sudlow's site I that explain the lower binding of colchicine in the glycated BSA. Based on our results, we believe that reduced drugs-binding affinity to glycated albumin may lead to drugs accumulation and precipitation in diabetic patients.
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Affiliation(s)
- Nayyar Rabbani
- a Department of Biochemistry, Protein Research Chair, College of Sciences , King Saud University , Riyadh 11451 , Saudi Arabia
| | - Shams Tabrez
- b King Fahd Medical Research Center , King Abdulaziz University , Jeddah 21589 , Saudi Arabia
| | - Badar Ul Islam
- c Department of Biochemistry, J. N. Medical College , Aligarh Muslim University , Aligarh 202002 , India
| | - Md Tabish Rehman
- d Department of Pharmacognosy, College of Pharmacy , King Saud University , Riyadh 11451 , Saudi Arabia
| | - Abdulrahman M Alsenaidy
- a Department of Biochemistry, Protein Research Chair, College of Sciences , King Saud University , Riyadh 11451 , Saudi Arabia
| | - Mohamed F AlAjmi
- d Department of Pharmacognosy, College of Pharmacy , King Saud University , Riyadh 11451 , Saudi Arabia
| | - Rais Ahmad Khan
- e Department of Chemistry, College of Sciences , King Saud University , Riyadh 11451 , Saudi Arabia
| | - Mohammad A Alsenaidy
- f Department of Pharmaceutics, College of Pharmacy , King Saud University , Riyadh , Saudi Arabia
| | - Mohd Shahnawaz Khan
- a Department of Biochemistry, Protein Research Chair, College of Sciences , King Saud University , Riyadh 11451 , Saudi Arabia
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8
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Effect of Temperature on Tolbutamide Binding to Glycated Serum Albumin. Molecules 2017; 22:molecules22040569. [PMID: 28362348 PMCID: PMC6154730 DOI: 10.3390/molecules22040569] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 03/20/2017] [Accepted: 03/27/2017] [Indexed: 12/17/2022] Open
Abstract
Glycation process occurs in protein and becomes more pronounced in diabetes when an increased amount of reducing sugar is present in bloodstream. Glycation of protein may cause conformational changes resulting in the alterations of its binding properties even though they occur at a distance from the binding sites. The changes in protein properties could be related to several pathological consequences such as diabetic and nondiabetic cardiovascular diseases, cataract, renal dysfunction and Alzheimer's disease. The experiment was designed to test the impact of glycation process on sulfonylurea drug tolbutamide-albumin binding under physiological (T = 309 K) and inflammatory (T = 311 K and T = 313 K) states using fluorescence and UV-VIS spectroscopies. It was found in fluorescence analysis experiments that the modification of serum albumin in tryptophanyl and tyrosyl residues environment may affect the tolbutamide (TB) binding to albumin in subdomain IIA and/or IIIA (Sudlow's site I and/or II), and also in subdomains IB and IIB. We estimated the binding of tolbutamide to albumin described by a mixed nature of interaction (specific and nonspecific). The association constants Ka (L∙mol-1) for tolbutamide at its high affinity sites on non-glycated albumin were in the range of 1.98-7.88 × 10⁴ L∙mol-1 (λex = 275 nm), 1.20-1.64 × 10⁴ L∙mol-1 (λex = 295 nm) and decreased to 1.24-0.42 × 10⁴ L∙mol-1 at λex = 275 nm (T = 309 K and T = 311 K) and increased to 2.79 × 10⁴ L∙mol-1 at λex = 275 nm (T = 313 K) and to 4.43-6.61 × 10⁴ L∙mol-1 at λex = 295 nm due to the glycation process. Temperature dependence suggests the important role of van der Waals forces and hydrogen bonding in hydrophobic interactions between tolbutamide and both glycated and non-glycated albumin. We concluded that the changes in the environment of TB binding of albumin in subdomain IIA and/or IIIA as well as in subdomains IB and IIB influence on therapeutic effect and therefore the studies of the binding of tolbutamide (in diabetes) to transporting protein under glycation that refers to the modification of a protein are of great importance in pharmacology and biochemistry. This information may lead to the development of more effective drug therapy in people with diabetes.
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Moura RS, Penna GO, Fujiwara T, Pontes MADA, Cruz R, Gonçalves HDS, Penna MLF, Cardoso LPV, Stefani MMDA, Bührer-Sékula S. Evaluation of a rapid serological test for leprosy classification using human serum albumin as the antigen carrier. J Immunol Methods 2014; 412:35-41. [PMID: 24983877 DOI: 10.1016/j.jim.2014.06.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 06/21/2014] [Accepted: 06/23/2014] [Indexed: 12/25/2022]
Abstract
The presence of anti-BSA antibodies may interfere in serological tests, as ELISA or immunochromatographic assays. BSA is frequently used as a blocking agent or as "inert" carrier of antigens, such as the NT-P-BSA, the semi-synthetic trisaccharide analogue of the PGL-I (phenolic glycolipid-I) antigen from the cell wall of the Mycobacterium leprae. PGL-I was prepared and linked to human serum albumin based in the hypothesis that replacing BSA by a human protein carrier would enhance the performance of leprosy serological tests. A total of 1162 serum samples were tested by ELISA and by the ML Flow rapid test using NT-P-BSA or NT-P-HSA antigens. When grouping leprosy patients as paucibacillary (PB) or multibacillary (MB) according to the Ridley & Jopling classification, ML Flow BSA and ML Flow HSA tests correctly allocated 70.9% and 68.6% of patients in the PB group, and 87% and 81% of patients in the MB group, respectively. Concordant results were found in 82.0% (953/1162) (kappa value=0.637; sd=0.023) of samples between ML Flow tests and 85.7% (996/1162) (kappa value=0.703; sd=0.021) between ELISA tests. ML Flow results were statistically similar and the same was true for ELISA tests using HSA or BSA. However, we noticed a tendency to decreased capacity to detect MB patients and an increased positivity among PB patients, HHC, TB patients and healthy controls by the HSA carrier in both ML Flow and ELISA. The PGL-I serology performed by the ML Flow test with BSA or HSA as antigen carriers can be a useful, friendly auxiliary tool to identify patients with higher bacterial load.
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Affiliation(s)
- Rodrigo Scaliante Moura
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | | | | | | | - Rossilene Cruz
- Fundação de Dermatologia Tropical e Venereologia Alfredo da Matta, Manaus, AM, Brazil
| | | | | | | | | | - Samira Bührer-Sékula
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, Brazil.
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Peng M, Zhang Y, Shi S, Peng S. Simultaneous ligand fishing and identification of human serum albumin binders from Eucommia ulmoides bark using surface plasmon resonance-high performance liquid chromatography-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 940:86-93. [PMID: 24141043 DOI: 10.1016/j.jchromb.2013.09.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 09/02/2013] [Accepted: 09/22/2013] [Indexed: 01/08/2023]
Abstract
Eucommia ulmoides bark has long been known as tonic herb, however, the systematic biochemical fingerprint analysis and corresponding structural identification are inadequate so far. Here we describe on-line surface plasmon resonance-high performance liquid chromatography-tandem mass spectrometry (SPR-HPLC-MS/MS) to fish out and identify human serum albumin (HSA) binders from E. ulmoides bark. A total of 22 HSA binders, including 4 iridoids, 11 lignans, 3 flavonoids and 4 phenolic acids, were identified or tentatively characterized based on their retention times, UV spectra and MS/MS spectrum with references or literature data, among which, geniposidic acid, geniposide and chlorogenic acid were the predominant HSA binders. In addition, the major characteristic fragmentation pathways of iridoids and lignans were investigated. The higher reusability and stability of the immobilized HSA allow the method cost-effective and high-throughput. Compared with conventional HPLC-MS/MS for chemical fingerprint analysis, SPR-HPLC-MS/MS is simple and easy to provide biochemical fingerprint, moreover, it is easy to identify low-content HSA binders because of the sample clean-up/concentration procedure.
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Affiliation(s)
- Mijun Peng
- Key Laboratory of Hunan Forest Products and Chemical Industry Engineering, Jishou University, Zhangjiajie 427000, China
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11
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Równicka-Zubik J, Sułkowski L, Maciążek-Jurczyk M, Sułkowska A. The effect of structural alterations of three mammalian serum albumins on their binding properties. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.12.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Zaidi N, Ahmad E, Rehan M, Rabbani G, Ajmal MR, Zaidi Y, Subbarao N, Khan RH. Biophysical Insight into Furosemide Binding to Human Serum Albumin: A Study To Unveil Its Impaired Albumin Binding in Uremia. J Phys Chem B 2013; 117:2595-604. [DOI: 10.1021/jp3069877] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Nida Zaidi
- Interdisciplinary Biotechnology
Unit, Aligarh Muslim University, Aligarh
202002, India
| | - Ejaz Ahmad
- Interdisciplinary Biotechnology
Unit, Aligarh Muslim University, Aligarh
202002, India
| | - Mohd Rehan
- School of
Computational and
Integrative Sciences, Jawaharlal Nehru University, New Delhi 110062, India
| | - Gulam Rabbani
- Interdisciplinary Biotechnology
Unit, Aligarh Muslim University, Aligarh
202002, India
| | - Mohammad R. Ajmal
- Interdisciplinary Biotechnology
Unit, Aligarh Muslim University, Aligarh
202002, India
| | - Yusra Zaidi
- Department of Zoology, Aligarh Muslim University, Aligarh 202002,
India
| | - Naidu Subbarao
- School of
Computational and
Integrative Sciences, Jawaharlal Nehru University, New Delhi 110062, India
| | - Rizwan H. Khan
- Interdisciplinary Biotechnology
Unit, Aligarh Muslim University, Aligarh
202002, India
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Khodarahmi R, Karimi SA, Ashrafi Kooshk MR, Ghadami SA, Ghobadi S, Amani M. Comparative spectroscopic studies on drug binding characteristics and protein surface hydrophobicity of native and modified forms of bovine serum albumin: possible relevance to change in protein structure/function upon non-enzymatic glycation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 89:177-186. [PMID: 22261105 DOI: 10.1016/j.saa.2011.12.058] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 12/19/2011] [Accepted: 12/21/2011] [Indexed: 05/31/2023]
Abstract
The interaction between serum albumin (SA) and drugs has provided an interesting ground for understanding of drug effects, especially in drug distribution and drug-drug interaction on SA, in the case of multi-drug therapy. Determination of the impact of various factors on drug-protein interaction is especially important upon significant binding of drug to albumin. In the present study, the interaction of two drugs (furosemide and indomethacin) with native and modified albumins were investigated by using various spectroscopic methods. Fluorescence data indicated that 1:1 binding of drugs to bovine serum albumin (BSA) is associated with quenching of albumin intrinsic fluorescence. The Job's plot also confirmed that drug binds to BSA via mentioned stoichiometry. Analysis of the quenching and thermodynamic parameters indicated that intermolecular interactions between drug and albumin may change upon protein modification. The theoretical analyses also suggested some conformational changes of interacting side chains in subdomain IIA binding site (at the vicinity of W237), which were in good agreement with experimental data. Decrease of protein surface hydrophobicity (PSH) was also observed upon both albumin modification and drug binding.
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Affiliation(s)
- Reza Khodarahmi
- Medical Biology Research Center, Department of Pharmacognosy and Biotechnology, Faculty of Pharmacy, P.O. Box 67145-1673, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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