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Marciniak A, Kotynia A, Krzyżak E, Czyżnikowska Ż, Zielińska S, Kozłowska W, Białas M, Matkowski A, Jezierska-Domaradzka A. Protopine and Allocryptopine Interactions with Plasma Proteins. Int J Mol Sci 2024; 25:5398. [PMID: 38791436 PMCID: PMC11121924 DOI: 10.3390/ijms25105398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 05/10/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024] Open
Abstract
A comprehensive study of the interactions of human serum albumin (HSA) and α-1-acid glycoprotein (AAG) with two isoquinoline alkaloids, i.e., allocryptopine (ACP) and protopine (PP), was performed. The UV-Vis spectroscopy, molecular docking, competitive binding assays, and circular dichroism (CD) spectroscopy were used for the investigations. The results showed that ACP and PP form spontaneous and stable complexes with HSA and AAG, with ACP displaying a stronger affinity towards both proteins. Molecular docking studies revealed the preferential binding of ACP and PP to specific sites within HSA, with site 2 (IIIA) being identified as the favored location for both alkaloids. This was supported by competitive binding assays using markers specific to HSA's drug binding sites. Similarly, for AAG, a decrease in fluorescence intensity upon addition of the alkaloids to AAG/quinaldine red (QR) complexes indicated the replacement of the marker by the alkaloids, with ACP showing a greater extent of replacement than PP. CD spectroscopy showed that the proteins' structures remained largely unchanged, suggesting that the formation of complexes did not significantly perturb the overall spatial configuration of these macromolecules. These findings are crucial for advancing the knowledge on the natural product-protein interactions and the future design of isoquinoline alkaloid-based therapeutics.
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Affiliation(s)
- Aleksandra Marciniak
- Department of Basic Chemical Sciences, Wroclaw Medical University, Borowska 211a, 50-556 Wrocław, Poland; (A.M.); (A.K.); (Ż.C.)
| | - Aleksandra Kotynia
- Department of Basic Chemical Sciences, Wroclaw Medical University, Borowska 211a, 50-556 Wrocław, Poland; (A.M.); (A.K.); (Ż.C.)
| | - Edward Krzyżak
- Department of Basic Chemical Sciences, Wroclaw Medical University, Borowska 211a, 50-556 Wrocław, Poland; (A.M.); (A.K.); (Ż.C.)
| | - Żaneta Czyżnikowska
- Department of Basic Chemical Sciences, Wroclaw Medical University, Borowska 211a, 50-556 Wrocław, Poland; (A.M.); (A.K.); (Ż.C.)
| | - Sylwia Zielińska
- Division of Pharmaceutical Biotechnology, Department of Pharmaceutical Biology and Biotechnology, Wroclaw Medical University, Borowska 211, 50-556 Wrocław, Poland; (W.K.); (A.J.-D.)
| | - Weronika Kozłowska
- Division of Pharmaceutical Biotechnology, Department of Pharmaceutical Biology and Biotechnology, Wroclaw Medical University, Borowska 211, 50-556 Wrocław, Poland; (W.K.); (A.J.-D.)
| | - Marcel Białas
- Student Scientific Club, Division of Pharmaceutical Biotechnology, Department of Pharmaceutical Biology and Biotechnology, Wroclaw Medical University, Borowska 211, 50-556 Wrocław, Poland;
| | - Adam Matkowski
- Division of Pharmaceutical Biology and Botany, Department of Pharmaceutical Biology and Biotechnology, Wroclaw Medical University, Borowska 211a, 50-556 Wrocław, Poland;
| | - Anna Jezierska-Domaradzka
- Division of Pharmaceutical Biotechnology, Department of Pharmaceutical Biology and Biotechnology, Wroclaw Medical University, Borowska 211, 50-556 Wrocław, Poland; (W.K.); (A.J.-D.)
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2
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Tian Y, Li C, Zeng F, Yu C, Xia Z, Huang Y. Study the interactions between multiple flavonoids and bovine serum albumin by the developed equilibrium dialysis. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1212:123515. [DOI: 10.1016/j.jchromb.2022.123515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 09/13/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022]
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3
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Zhang Y, Huang M, Wang Q, Zhang X, Peng J, Zhang Y, Wu Q, Duan J, Mao X, Tang Z, Li B, Zhu H. Insights into the penetration of PhACs in TCM during ultrafiltration: Effects of fouling mechanisms and intermolecular interactions. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Yu Q, Li M, Chen H, Xu L, Cheng J, Lin G, Liu Y, Su Z, Yang X, Li Y, Chen J, Xie J. The discovery of berberine erythrocyte-hemoglobin self-assembly delivery system: a neglected carrier underlying its pharmacokinetics. Drug Deliv 2022; 29:856-870. [PMID: 35277093 PMCID: PMC8920379 DOI: 10.1080/10717544.2022.2036870] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Berberine (BBR) has extremely low concentration and high tissue distribution. However, current pharmacokinetic studies predominantly focus on its concentration in plasma, which could hardly make a comprehensive understanding of its pharmacokinetic process. This study made a pioneering endeavor to explore the erythrocyte-hemoglobin (Hb) self-assembly system of BBR by exploring the interaction of BBR with erythrocyte and the combination of BBR with Hb. Results showed that BBR had a low bioavailability (C0 = 2.833 μg/mL via intravenous administration of 2.5 mg/kg BBR and Cmax = 0.260 μg/mL via oral administration of 400 mg/kg BBR). Besides, BBR achieved higher concentrations in erythrocytes than plasma, and the erythrocytes count and Hb content were significantly decreased after intravenous administration. Hemolysis rate indicated the BBR-erythrocyte system (with 2% erythrocytes) was relatively stable without hemolysis at the concentration of 1.00 mg/mL. And the maximum percentage of drug loading was 100% when the BBR-erythrocyte concentration was 0.185 μg/mL. Furthermore, incubation of BBR and erythrocytes resulted in internalization of the erythrocyte membrane and the formation of intracellular vacuoles. The thermodynamic parameters indicated that the binding process of bovine hemoglobin (BHB) and BBR was spontaneous. UV-vis absorption spectra, synchronous fluorescence, circular dichroism and Raman spectra collectively indicated that BBR showed strong binding affinity toward BHB and affected the molecular environment of residues like tryptophan and tyrosine in BHB, resulting in the conformational changes of its secondary and tertiary structure. Molecular docking indicated BBR interacted with Arg-141 residue of BHB via hydrogen bond with the bond length of 2.55 Å. The ΔG value of the BHB-BBR system was −31.79 kJ/mol. Molecular dynamics simulation indicated the root mean square derivation of BBR-BHB was <0.025 nm, suggestive of stable conformation. Cumulatively, there was an erythrocyte-Hb self-assembled drug delivery system after oral or intravenous administration of BBR, which conceivably gained novel insight into the discrepancy between the extremely low plasma concentration and relatively high tissue concentration of BBR.
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Affiliation(s)
- Qiuxia Yu
- The Second Clinical College of Guangzhou, University of Chinese Medicine, Guangzhou, China
| | - Minhua Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hanbin Chen
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lieqiang Xu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Juanjuan Cheng
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Guoshu Lin
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yuhong Liu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ziren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaobo Yang
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
- State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou, China
| | - Yucui Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jiannan Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jianhui Xie
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
- State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou, China
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5
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Xiang X, Sun Q, Gan N, Suo Z, Zhang S, Yao S, Xiang H, Yuan N, Li H. Interaction between berberine hydrochloride and β-lactoglobulin of two structures by heat treatment. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107168] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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6
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Physiologically based pharmacokinetic model predictions of natural product-drug interactions between goldenseal, berberine, imatinib and bosutinib. Eur J Clin Pharmacol 2022; 78:597-611. [DOI: 10.1007/s00228-021-03266-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 12/13/2021] [Indexed: 11/03/2022]
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7
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Therapeutic Effects of Berberine in Metabolic Diseases and Diabetes Mellitus. REVISTA BRASILEIRA DE FARMACOGNOSIA 2021. [DOI: 10.1007/s43450-021-00159-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Khatun R, Dolai M, Sasmal M, Sepay N, Ali M. Bovine serum albumin interactive one dimensional hexanuclear manganese( iii) complex: synthesis, structure, binding and molecular docking studies. NEW J CHEM 2021. [DOI: 10.1039/d1nj01492g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A hexanuclear Mn(III) complex was synthesized and structiurally characterized which exhibits fluorescence quenching of BSA probably through site selective binding at the mouth of site I in subdomain IIA.
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Affiliation(s)
- Rousunara Khatun
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata-700032
- India
| | - Malay Dolai
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata-700032
- India
| | - Mihir Sasmal
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata-700032
- India
| | - Nayim Sepay
- Department of Chemistry
- Lady Brabourne College
- Kolkata 700 017
- India
| | - Mahammad Ali
- Department of Chemistry
- Inorganic Chemistry Section
- Jadavpur University
- Kolkata-700032
- India
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9
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Raza M, Jiang Y, Ahmad B, Rahman AU, Raza S, Khan A, Tahir K, Hassan S, Khan S, Yuan Q. Biophysical investigation of interactions between sorbic acid and human serum albumin through spectroscopic and computational approaches. NEW J CHEM 2021. [DOI: 10.1039/d0nj06276f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This work provides an effective strategy to analyze the SA-induced microenvironmental changes in the HSA macromolecule, and also highlights the medicinal importance of SA.
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Affiliation(s)
- Muslim Raza
- Institute of Synthetic Biology
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen
- China
| | - Yang Jiang
- State Key Laboratory of Chemical Resource Engineering
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Bashir Ahmad
- Centre of Biotechnology and Microbiology
- University of Peshawar
- Peshawar
- Pakistan
| | - Ata ur Rahman
- Institute of chemical sciences
- University of Peshawar
- Peshawar 25120
- Pakistan
| | - Saleem Raza
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- P. R. China
| | - Ajmal Khan
- Natural and Medical Sciences Research Centre
- University of Nizwa
- Nizwa 616
- Sultanate of Oman
| | - Kamran Tahir
- Institute of Chemical Sciences
- Gomal University
- D. I. Khan
- Pakistan
| | - Said Hassan
- Centre of Biotechnology and Microbiology
- University of Peshawar
- Peshawar
- Pakistan
| | - Saifullah Khan
- Centre of Biotechnology and Microbiology
- University of Peshawar
- Peshawar
- Pakistan
| | - Qipeng Yuan
- State Key Laboratory of Chemical Resource Engineering
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- P. R. China
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10
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Bhattacharjee P, Sarkar S, Shmatova OI, Nenajdenko VG, Pandya P, Bhadra K. Synthetic carboline compounds targeting protein: biophysical and biological perspective. J Biomol Struct Dyn 2020; 39:3703-3720. [PMID: 32410501 DOI: 10.1080/07391102.2020.1769732] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Pictet-Spengler cyclization method has been adopted for the synthesis of three carboline derived compounds: two compounds with tetrahydro gama- and beta-having CF3 group and amino alkyl chain at delta and alpha position, respectively, and another with guanidine alkyl chain at alpha-position. Structure-activity relationship of the analogues with human serum albumin was studied by fluorescence and Fourier-transform infrared spectroscopy followed by molecular docking. The data showed maximum affinity of human serum albumin with comp7 (S0-820) followed by comp3 (S0-1040) and least with comp1 (S0-728). The compounds were tested for cytotoxic potencies. Comp3, showed maximum cytotoxicity with GI50 6.2 µM, against HCT-116, followed by comp7, and poor cytotoxicity with comp1. Comp3 and 7 induced oxidative stress mediated autophagy led programmed cell death in HCT-116. Furthermore, the compounds effectively inhibit DNA topoisomerase I activity and showed anti-inflammatory actions. In vivo studies regarding therapeutic protective action of Comp3, as a representative carboline analogue, against colon toxicant, 1,2-dimethylhydrazine dihydrochloride (DMH), showed the efficacy of the compound against organ toxicity. The existing studies on biological evaluation showed that these synthetic compounds may have a major role as anticancer agents having myriad of proven therapeutic applications. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
| | - Sarita Sarkar
- Department of Zoology, University of Kalyani, Nadia, West Bengal, India
| | - Olga I Shmatova
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | | | - Prateek Pandya
- Amity Institute of Forensic Sciences, Amity University, Noida, India
| | - Kakali Bhadra
- Department of Zoology, University of Kalyani, Nadia, West Bengal, India
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11
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Tarabasz D, Kukula-Koch W. Palmatine: A review of pharmacological properties and pharmacokinetics. Phytother Res 2019; 34:33-50. [PMID: 31496018 DOI: 10.1002/ptr.6504] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 06/18/2019] [Accepted: 08/19/2019] [Indexed: 12/11/2022]
Abstract
The aim of this review is to collect together the results of the numerous studies over the last two decades on the pharmacological properties of palmatine published in scientific databases like Scopus and PubMed, which are scattered across different publications. Palmatine, an isoquinoline alkaloid from the class of protoberberines, is a yellow compound present in the extracts from different representatives of Berberidaceae, Papaveraceae, Ranunculaceae, and Menispermaceae. It has been extensively used in traditional medicine of Asia in the treatment of jaundice, liver-related diseases, hypertension, inflammation, and dysentery. New findings describe its possible applications in the treatment of civilization diseases like central nervous system-related problems. This review intends to let this alkaloid come out from the shade of a more frequently described alkaloid: berberine. The toxicity, pharmacokinetics, and biological activities of this protoberberine alkaloid will be developed in this work.
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Affiliation(s)
| | - Wirginia Kukula-Koch
- Chair and Department of Pharmacognosy with Medicinal Plants Unit, Medical University of Lublin, Lublin, Poland
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12
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Palmatine: A review of its pharmacology, toxicity and pharmacokinetics. Biochimie 2019; 162:176-184. [DOI: 10.1016/j.biochi.2019.04.008] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 04/07/2019] [Indexed: 12/22/2022]
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13
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Ghosh T, Sarkar S, Bhattacharjee P, Jana GC, Hossain M, Pandya P, Bhadra K. In vitro relationship between serum protein binding to beta-carboline alkaloids: a comparative cytotoxic, spectroscopic and calorimetric assays. J Biomol Struct Dyn 2019; 38:1103-1118. [PMID: 30909826 DOI: 10.1080/07391102.2019.1595727] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The work highlighted interaction of harmalol, harmaline and harmine with human serum albumin by biophysical and biochemical assays. Presence of serum protein in the media negatively affects the cytotoxicity of the alkaloids. MTT assay indicates concentration-dependent growth inhibitory effect of the alkaloids on A375, MDA-MB-231, HeLa, A549, ACHN and HepG2 cell, having maximum cytotoxicity with GI50 value of 6.5 μM on ACHN by harmine in 1% of fetal bovine serum. Detail cytotoxic studies on ACHN cell by harmine, the most cytotoxic among the three, reveal nucleosomal fragmentation, formation of comet tail, generation of reactive oxygen species, decreased mitochondrial membrane potential, up regulation of p53, caspase 3 and significant increase in G2/M population that made the cancer cells prone to apoptosis. Furthermore, the findings unequivocally pointed out that harmine binds strongly to the protein with a binding constant of 5.53 × 104 M-1 followed by harmaline and least with harmalol. Thermodynamic results revealed enthalpy dominated, entropy favored, 1:1 binding. Molecular docking and circular dichroism suggested changed conformation of protein by partial unfolding on complexation. Further supported by infrared analysis where protein secondary structure was altered with a major decrease of α-helix from 53.68% (free protein) to 8-11% and change in β-sheet from 25.31% (free protein) to 1-6% upon binding, inducing partial protein destabilization. Site markers demonstrated site I (subdomain IIA) binding of the alkaloids to the protein. The results serve as data for the future development of serum protein-based targeted drugs. AbbreviationsCD: circular dichroism; FBS: fetal bovine serumFRETForster resonance energy transferFTIRFourier transform infraredHSAhuman serum albumin; ROS: reactive oxygen speciesCommunicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Tapas Ghosh
- Department of Zoology, University of Kalyani, Nadia, West Bengal, India
| | - Sarita Sarkar
- Department of Zoology, University of Kalyani, Nadia, West Bengal, India.,Bose Institute, Kolkata, India
| | | | - Gopal Chandra Jana
- Department of Zoology, University of Kalyani, Nadia, West Bengal, India.,Vidyasagar University, Midnapore, West Bengal, India
| | - Maidul Hossain
- Department of Zoology, University of Kalyani, Nadia, West Bengal, India.,Vidyasagar University, Midnapore, West Bengal, India
| | - Prateek Pandya
- Department of Zoology, University of Kalyani, Nadia, West Bengal, India.,Amity Institute of Forensic Sciences, Amity University, Noida, Uttar Pradesh, India
| | - Kakali Bhadra
- Department of Zoology, University of Kalyani, Nadia, West Bengal, India
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14
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Jiao Q, Wang R, Jiang Y, Liu B. Study on the interaction between active components from traditional Chinese medicine and plasma proteins. Chem Cent J 2018; 12:48. [PMID: 29728878 PMCID: PMC5935606 DOI: 10.1186/s13065-018-0417-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 04/24/2018] [Indexed: 02/06/2023] Open
Abstract
Traditional Chinese medicine (TCM), as a unique form of natural medicine, has been used in Chinese traditional therapeutic systems over two thousand years. Active components in Chinese herbal medicine are the material basis for the prevention and treatment of diseases. Research on drug-protein binding is one of the important contents in the study of early stage clinical pharmacokinetics of drugs. Plasma protein binding study has far-reaching influence on the pharmacokinetics and pharmacodynamics of drugs and helps to understand the basic rule of drug effects. It is important to study the binding characteristics of the active components in Chinese herbal medicine with plasma proteins for the medical science and modernization of TCM. This review summarizes the common analytical methods which are used to study the active herbal components-protein binding and gives the examples to illustrate their application. Rules and influence factors of the binding between different types of active herbal components and plasma proteins are summarized in the end. Finally, a suggestion on choosing the suitable technique for different types of active herbal components is provided, and the prospect of the drug-protein binding used in the area of TCM research is also discussed.
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Affiliation(s)
- Qishu Jiao
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Rufeng Wang
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Yanyan Jiang
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Bin Liu
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, 102488, China.
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15
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Khan AY, Suresh Kumar G. Exploring the binding interaction of potent anticancer drug topotecan with human serum albumin: spectroscopic, calorimetric and fibrillation study. J Biomol Struct Dyn 2017; 36:2463-2473. [DOI: 10.1080/07391102.2017.1359671] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Asma Yasmeen Khan
- Biophysical Chemistry Laboratory, Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory, Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
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16
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Das S, Islam MM, Jana GC, Patra A, Jha PK, Hossain M. Molecular binding of toxic phenothiazinium derivatives, azures to bovine serum albumin: A comparative spectroscopic, calorimetric, and in silico study. J Mol Recognit 2017; 30. [PMID: 28101950 DOI: 10.1002/jmr.2609] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 12/21/2016] [Accepted: 12/22/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Somnath Das
- Department of Chemistry and Chemical Technology; Vidyasagar University; Midnapore West Bengal India
| | - Md. Maidul Islam
- Department of Chemistry; Aliah University; Kolkata West Bengal India
| | - Gopal Chandra Jana
- Department of Chemistry and Chemical Technology; Vidyasagar University; Midnapore West Bengal India
| | - Anirudha Patra
- Department of Chemistry and Chemical Technology; Vidyasagar University; Midnapore West Bengal India
| | - Pradeep K. Jha
- SMST; Indian Institute of Technology Kharagpur; Kharagpur West Bengal India
| | - Maidul Hossain
- Department of Chemistry and Chemical Technology; Vidyasagar University; Midnapore West Bengal India
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17
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Banipal TS, Kaur A, Banipal PK. Physicochemical aspects of the energetics of binding of sulphanilic acid with bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 170:214-225. [PMID: 27450119 DOI: 10.1016/j.saa.2016.07.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 06/10/2016] [Accepted: 07/10/2016] [Indexed: 06/06/2023]
Abstract
The thermodynamic study of the binding of sulphanilic acid with model transport protein bovine serum albumin is a promising approach in the area of synthesizing new sulfa drugs with improved therapeutic effect. Thus, such binding studies play an important role in the rational drug design process. The binding between sulphanilic acid and bovine serum albumin has been studied using calorimetry, light scattering in combination with spectroscopic and microscopic techniques. The calorimetric data reveals the presence of two sequential nature of binding sites where the first binding site has stronger affinity (~10(4)M(-1)) and second binding site has weaker affinity (~10(3)M(-1)). However, the spectroscopic (absorption and fluorescence) results suggest the presence of single low affinity binding site (~10(3)M(-1)) on protein. The contribution of polar and non-polar interactions to the binding process has been explored in the presence of various additives. It is found that sulphanilic acid binds with high affinity at Sudlow site II and with low affinity at Sudlow site I of protein. Light scattering and circular dichroism measurements have been used to study the effect on the molecular topology and conformation of protein, respectively. Thus these studies provide important insights into the binding of sulphanilic acid with bovine serum albumin both quantitatively and qualitatively.
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Affiliation(s)
- Tarlok S Banipal
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
| | - Amandeep Kaur
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Parampaul K Banipal
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India
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18
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He J, Li S, Xu K, Tang B, Yang H, Wang Q, Li H. Binding properties of the natural red dye carthamin with human serum albumin: Surface plasmon resonance, isothermal titration microcalorimetry, and molecular docking analysis. Food Chem 2016; 221:650-656. [PMID: 27979254 DOI: 10.1016/j.foodchem.2016.11.124] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/19/2016] [Accepted: 11/22/2016] [Indexed: 01/30/2023]
Abstract
The interaction between carthamin and human serum albumin (HSA) was investigated by multiple spectroscopic analyses, surface plasmon resonance (SPR), isothermal titration microcalorimetry (ITC), and molecular docking studies. Fluorescence lifetime measurements implied that carthamin quenched the intrinsic fluorescence of HSA with the formation of a new complex via static mode. Binding affinities regarding this interaction were obtained from SPR analysis. Results demonstrated that carthamin could form a 1:1 complex with HSA at the binding affinity of KD=8.726×10-5M and that a high temperature was unfavourable for the interaction. ITC analyses and molecular docking results illustrated that HSA shaped a proper cavity (site I) to embed the whole carthamin molecule and that the complex was formed depending on intermolecular forces, including hydrophobic interaction, hydrogen bonding, and electrostatic force. Moreover, circular dichroism and 3D fluorescence demonstrated that carthamin slightly disturbed the microenvironment of amino residues and affected the secondary structure of HSA.
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Affiliation(s)
- Jiawei He
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Shanshan Li
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Kailin Xu
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Bin Tang
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Hongqin Yang
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Qing Wang
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Hui Li
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China.
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19
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Interaction of glutathione with bovine serum albumin: Spectroscopy and molecular docking. Food Chem 2016; 202:426-31. [DOI: 10.1016/j.foodchem.2016.02.026] [Citation(s) in RCA: 126] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 01/10/2016] [Accepted: 02/02/2016] [Indexed: 01/24/2023]
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20
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Khan AY, Suresh Kumar G. Natural isoquinoline alkaloids: binding aspects to functional proteins, serum albumins, hemoglobin, and lysozyme. Biophys Rev 2015; 7:407-420. [PMID: 28510102 DOI: 10.1007/s12551-015-0183-5] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 10/19/2015] [Indexed: 02/04/2023] Open
Abstract
The putative anticancer alkaloids berberine, palmatine, jatrorrhizine, and sanguinarine are known to bind to nucleic acids. To develop them as potential drugs for therapeutic use, their binding affinity to functional proteins and mode of transport in the circulatory system need to be clearly understood. Towards this, many studies on their binding aspects to proteins have been reported and a considerable amount of data, mostly of biophysical nature, exists in the literature. The importance of these natural isoquinoline alkaloids and the recent literature on their interaction phenomena with functional proteins, serum albumins, hemoglobin, and lysozyme are presented in this review.
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Affiliation(s)
- Asma Yasmeen Khan
- Biophysical Chemistry Laboratory, Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata, 700 032, India
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory, Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata, 700 032, India.
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21
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Quantitative evaluation of berberine subcellular distribution and cellular accumulation in non-small cell lung cancer cells by UPLC–MS/MS. Talanta 2015; 144:20-8. [DOI: 10.1016/j.talanta.2015.05.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 04/29/2015] [Accepted: 05/05/2015] [Indexed: 01/01/2023]
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22
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Li X, Hao Y. Probing the binding of (+)-catechin to bovine serum albumin by isothermal titration calorimetry and spectroscopic techniques. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.02.082] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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23
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Li X, Wang G, Chen D, Lu Y. β-Carotene and astaxanthin with human and bovine serum albumins. Food Chem 2015; 179:213-21. [DOI: 10.1016/j.foodchem.2015.01.133] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 01/25/2015] [Accepted: 01/31/2015] [Indexed: 12/11/2022]
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24
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Basu A, Suresh Kumar G. Thermodynamics of the interaction of the food additive tartrazine with serum albumins: A microcalorimetric investigation. Food Chem 2015; 175:137-42. [DOI: 10.1016/j.foodchem.2014.11.141] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Revised: 10/29/2014] [Accepted: 11/25/2014] [Indexed: 11/29/2022]
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25
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Yue X, Armijo Z, King K, Bondar MV, Morales AR, Frazer A, Mikhailov IA, Przhonska OV, Belfield KD. Steady-state and femtosecond transient absorption spectroscopy of new two-photon absorbing fluorene-containing quinolizinium cation membrane probes. ACS APPLIED MATERIALS & INTERFACES 2015; 7:2833-2846. [PMID: 25622309 DOI: 10.1021/am508093p] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The synthesis, linear photophysical characterization, and nonlinear optical properties of two new symmetrical fluorene-containing quinolizinium derivatives, 2,8-bis((E)-2-(7-(diphenylamino)-9,9-dihexyl-9H-fluoren-2-yl)vinyl)quinolizinium hexafluorophosphate (1) and 2,8-bis((E)-2-(7-((7-(diphenylamino)-9,9-dihexyl-9H-fluoren-2-yl)ethynyl)-9,9-dihexyl-9H-fluoren-2yl)vinyl)quinolizinium hexafluorophosphate (2), are reported. The nature of the dual-band steady-state fluorescence emission of 1 and 2 was determined, and violation of Kasha's rule along with a strong dependence on solvent polarity were shown. A relatively complex structure of two-photon absorption (2PA) spectra of 1 and 2, with maximum cross sections of ∼400-600 GM, was determined using the open aperture Z-scan method. Different types of fast relaxation processes with characteristic times of 0.3-0.5 ps and 1.5-2 ps were observed in the excited states of the new compounds via femtosecond transient absorption pump-probe spectroscopy. To better understand the photophysical behavior of 1 and 2, a quantum-mechanical study was undertaken using TD-DFT and ZINDO/S methods. Simulated linear absorption spectra were found to be in good agreement with experimental data, while 2PA cross sections were overestimated. Although the new dyes were highly fluorescent in nonpolar solvents, they were essentially nonfluorescent in polar media. Significantly, the quinolizinium dyes exhibited fluorescence turn-on behavior upon binding to bovine serum album (BSA) protein, exhibiting over 4-fold fluorescence enhancement, which was a finding that was leveraged to demonstrate cell membrane fluorescence imaging of HeLa cells.
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Affiliation(s)
- Xiling Yue
- Department of Chemistry, University of Central Florida , P.O. Box 162366, Orlando, Florida 32816, United States
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26
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Chaturvedi SK, Ahmad E, Khan JM, Alam P, Ishtikhar M, Khan RH. Elucidating the interaction of limonene with bovine serum albumin: a multi-technique approach. MOLECULAR BIOSYSTEMS 2015; 11:307-16. [DOI: 10.1039/c4mb00548a] [Citation(s) in RCA: 191] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Mechanistic insight into the BSA–limonene interaction: biophysical and molecular docking approach.
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Affiliation(s)
| | - Ejaz Ahmad
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh 202002
- India
| | - Javed Masood Khan
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh 202002
- India
| | - Parvez Alam
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh 202002
- India
| | - Mohd Ishtikhar
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh 202002
- India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh 202002
- India
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27
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Li X, Wang S. Binding of glutathione and melatonin to human serum albumin: a comparative study. Colloids Surf B Biointerfaces 2014; 125:96-103. [PMID: 25500326 DOI: 10.1016/j.colsurfb.2014.11.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 10/13/2014] [Accepted: 11/16/2014] [Indexed: 12/20/2022]
Abstract
Binding of glutathione and melatonin to human serum albumin (HSA) has been studied using isothermal titration calorimetry (ITC) in combination with UV-vis absorption spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, and circular dichroism (CD) spectroscopy. Thermodynamic investigations reveal that glutathione/melatonin binds to HSA is driven by favorable enthalpy and unfavorable entropy, and the major driving forces are hydrogen bond and van der Waals force. For glutathione, the interaction is characterized by a high number of binding sites, which suggests that binding occurs by a surface adsorption mechanism that leads to coating of the protein surface. For melatonin, one molecule of melatonin combines with one molecule of HSA and no more melatonin binding to HSA occurs at concentration ranges used in this study. The UV-vis absorption, FT-IR, and CD spectroscopy suggest that glutathione and melatonin may induce conformational and microenvironmental changes of HSA.
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Affiliation(s)
- Xiangrong Li
- Department of Chemistry, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China.
| | - Su Wang
- General surgery, The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453003, PR China
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28
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Palmatine activates AhR and upregulates CYP1A activity in HepG2 cells but not in human hepatocytes. Toxicol In Vitro 2014; 28:693-9. [DOI: 10.1016/j.tiv.2014.02.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 01/30/2014] [Accepted: 02/17/2014] [Indexed: 12/15/2022]
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29
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Basu A, Kumar GS. Study on the interaction of the toxic food additive carmoisine with serum albumins: a microcalorimetric investigation. JOURNAL OF HAZARDOUS MATERIALS 2014; 273:200-206. [PMID: 24742664 DOI: 10.1016/j.jhazmat.2014.03.049] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 03/07/2014] [Accepted: 03/17/2014] [Indexed: 06/03/2023]
Abstract
The interaction of the synthetic azo dye and food colorant carmoisine with human and bovine serum albumins was studied by microcalorimetric techniques. A complete thermodynamic profile of the interaction was obtained from isothermal titration calorimetry studies. The equilibrium constant of the complexation process was of the order of 10(6)M(-1) and the binding stoichiometry was found to be 1:1 with both the serum albumins. The binding was driven by negative standard molar enthalpy and positive standard molar entropy contributions. The binding affinity was lower at higher salt concentrations in both cases but the same was dominated by mostly non-electrostatic forces at all salt concentrations. The polyelectrolytic forces contributed only 5-8% of the total standard molar Gibbs energy change. The standard molar enthalpy change enhanced whereas the standard molar entropic contribution decreased with rise in temperature but they compensated each other to keep the standard molar Gibbs energy change almost invariant. The negative standard molar heat capacity values suggested the involvement of a significant hydrophobic contribution in the complexation process. Besides, enthalpy-entropy compensation phenomenon was also observed in both the systems. The thermal stability of the serum proteins was found to be remarkably enhanced on binding to carmoisine.
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Affiliation(s)
- Anirban Basu
- Biophysical Chemistry Laboratory, Chemistry Division, CSIR-Indian Institute of Chemical Biology Kolkata, 4, Raja S.C. Mullick Road Jadavpur, Kolkata 700 032, West Bengal, India
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory, Chemistry Division, CSIR-Indian Institute of Chemical Biology Kolkata, 4, Raja S.C. Mullick Road Jadavpur, Kolkata 700 032, West Bengal, India.
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30
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Jash C, Kumar GS. Binding of alkaloids berberine, palmatine and coralyne to lysozyme: a combined structural and thermodynamic study. RSC Adv 2014. [DOI: 10.1039/c3ra46053c] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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31
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Das A, Kumar GS. Binding studies of aristololactam-β-d-glucoside and daunomycin to human serum albumin. RSC Adv 2014. [DOI: 10.1039/c4ra04327h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The binding of two carbohydrate containing molecules aristololactam-β-d-glucoside and daunomycin with human serum albumin was evaluated by biophysical techniques.
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Affiliation(s)
- Abhi Das
- Biophysical Chemistry Laboratory
- Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032, India
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory
- Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032, India
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32
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Li X, Wang G, Chen D, Lu Y. Binding of ascorbic acid and α-tocopherol to bovine serum albumin: a comparative study. ACTA ACUST UNITED AC 2014; 10:326-37. [DOI: 10.1039/c3mb70373h] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Marszalek M, Konarska A, Szajdzinska-Pietek E, Wolszczak M. Interaction of Cationic Protoberberine Alkaloids with Human Serum Albumin. No Spectroscopic Evidence on Binding to Sudlow’s Site 1. J Phys Chem B 2013; 117:15987-93. [DOI: 10.1021/jp408827b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Milena Marszalek
- Institute of Applied Radiation
Chemistry, Lodz University of Technology, Wroblewskiego 15, 93-590 Lodz, Poland
| | - Anna Konarska
- Institute of Applied Radiation
Chemistry, Lodz University of Technology, Wroblewskiego 15, 93-590 Lodz, Poland
| | - Ewa Szajdzinska-Pietek
- Institute of Applied Radiation
Chemistry, Lodz University of Technology, Wroblewskiego 15, 93-590 Lodz, Poland
| | - Marian Wolszczak
- Institute of Applied Radiation
Chemistry, Lodz University of Technology, Wroblewskiego 15, 93-590 Lodz, Poland
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34
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Li X, Chen D, Wang G, Lu Y. Study of interaction between human serum albumin and three antioxidants: ascorbic acid, α-tocopherol, and proanthocyanidins. Eur J Med Chem 2013; 70:22-36. [PMID: 24140914 DOI: 10.1016/j.ejmech.2013.09.033] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 07/23/2013] [Accepted: 09/15/2013] [Indexed: 11/18/2022]
Abstract
Ascorbic acid, α-tocopherol and proanthocyanidins are three classic dietary antioxidants. In this study, the interaction between the three antioxidants and human serum albumin (HSA) was investigated by several spectroscopic techniques. Experimental results proved that the three antioxidants quench the fluorescence of HSA through a static (proanthocyanidins) or static-dynamic combined quenching mechanism (ascorbic acid and α-tocopherol). Thermodynamic investigations revealed that the combination between ascorbic acid or proanthocyanidins and HSA was driven mainly by electrostatic interaction, and the hydrophobic interactions play a major role for α-tocopherol-HSA association. Binding site I was found to be the primary binding site for ascorbic acid and proanthocyanidins, and site II for α-tocopherol. Additionally, the three antioxidants may induce conformational and microenvironmental changes of HSA.
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Affiliation(s)
- Xiangrong Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China; Department of Chemistry, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China.
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35
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Hazra S, Hossain M, Kumar GS. Studies on α-, β-, and γ-cyclodextrin inclusion complexes of isoquinoline alkaloids berberine, palmatine and coralyne. J INCL PHENOM MACRO 2013. [DOI: 10.1007/s10847-013-0301-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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36
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Hazra S, Hossain M, Suresh Kumar G. Binding of isoquinoline alkaloids berberine, palmatine and coralyne to hemoglobin: structural and thermodynamic characterization studies. MOLECULAR BIOSYSTEMS 2012; 9:143-53. [PMID: 23147244 DOI: 10.1039/c2mb25345c] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Berberine, palmatine and coralyne, the isoquinoline alkaloids distributed in many botanical families, are extensively investigated due to their potential therapeutic actions and clinical utilities. In this work, their binding characteristics to hemoglobin (Hb) were studied by UV-vis absorption spectroscopy, fluorescence spectroscopy, circular dichroism spectroscopy, isothermal calorimetric titration and differential scanning calorimetric techniques. The results indicated that all the three alkaloids caused strong fluorescence quenching of Hb by the static quenching mechanism, but with differing quenching efficiencies. There was a single binding site on Hb for these alkaloids. According to the theory of Förster resonance energy transfer, the binding distances between β-Trp37 of Hb and berberine, palmatine and coralyne were evaluated to be 2.78 nm, 2.64 nm and 3.29 nm, respectively. The result of synchronous fluorescence, circular dichroism and 3D fluorescence revealed that the polarity around Trp residues experienced a significant increase in the presence of alkaloids. The binding was favoured by enthalpy and entropy changes. Results of circular dichroism, 3D and synchronous fluorescence studies confirmed that the binding of the alkaloids significantly changed the secondary structure of Hb. The studies revealed that berberine and palmatine bound to a site near to the α1β2 interface on Hb different than coralyne but the affinity of coralyne was one order higher than that of berberine and palmatine.
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Affiliation(s)
- Soumitra Hazra
- Biophysical Chemistry Laboratory, Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
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