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Poša M. Self-Association of the Anion of 7-Oxodeoxycholic Acid (Bile Salt): How Secondary Micelles Are Formed. Int J Mol Sci 2023; 24:11853. [PMID: 37511620 PMCID: PMC10380805 DOI: 10.3390/ijms241411853] [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: 06/30/2023] [Revised: 07/21/2023] [Accepted: 07/22/2023] [Indexed: 07/30/2023] Open
Abstract
Bile acid anions are steroidal biosurfactants that form primary micelles due to the hydrophobic effect. At higher concentrations of some bile acid anions, secondary micelles are formed; hydrogen bonds connect primary micelles. Monoketo derivatives of cholic acid, which have reduced membrane toxicity, are important for biopharmaceutical examinations. The main goal is to explain why the processes of formation of primary and secondary micelles are separated from each other, i.e., why secondary micelles do not form parallel to primary micelles. The association of the anion of 7-oxodeoxycholic acid (a monoketo derivative of cholic acid) is observed through the dependence of the spin-lattice relaxation time on total surfactant concentration T1 = f(CT). On the function T1 = f(CT), two sharp jumps of the spin-lattice relaxation time are obtained, i.e., two critical micellar concentrations (CMC). The aggregation number of the micelle at 50 mM total concentration of 7-oxodeoxycholic acid anions in the aqueous solution is 4.2 ± 0.3, while at the total concentration of 100 mM the aggregation number is 9.0 ± 0.9. The aggregation number of the micelle changes abruptly in the concentration interval of 80-90 mM (the aggregation number determined using fluorescence measurements). By applying Le Chatelier's principle, the new mechanism of formation of secondary micelles is given, and the decoupling of the process of formation of primary and secondary micelles at lower concentrations of monomers (around the first critical micellar concentration) and the coupling of the same processes at higher equilibrium concentrations of monomers (around the second critical micellar concentration) is explained. Stereochemically and thermodynamically, a direct mutual association of primary micelles is less likely, but monomeric units are more likely to be attached to primary micelles, i.e., 7-oxodeoxycholic acid anions.
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Affiliation(s)
- Mihalj Poša
- Department of Pharmacy, Faculty of Medicine, University of Novi Sad, Hajduk Veljka 3, 21000 Novi Sad, Serbia
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Xu Z, Xue T, He T. Investigation on the chiral recognition mechanism between verteporfin and cholate salts by capillary electrophoresis. J Sep Sci 2020; 43:2905-2913. [DOI: 10.1002/jssc.202000026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 04/04/2020] [Accepted: 04/14/2020] [Indexed: 01/08/2023]
Affiliation(s)
- Zhongqi Xu
- College of ChemistryChemical Engineering and BiotechnologyDonghua University Shanghai 201620 P. R. China
| | - Tianfeng Xue
- College of ChemistryChemical Engineering and BiotechnologyDonghua University Shanghai 201620 P. R. China
| | - Tao He
- College of ChemistryChemical Engineering and BiotechnologyDonghua University Shanghai 201620 P. R. China
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3
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Tuncer E, Bayramoglu B. Characterization of the self-assembly and size dependent structural properties of dietary mixed micelles by molecular dynamics simulations. Biophys Chem 2019; 248:16-27. [PMID: 30850307 DOI: 10.1016/j.bpc.2019.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 01/27/2019] [Accepted: 02/01/2019] [Indexed: 01/05/2023]
Abstract
The bile salts and phospholipids are secreted by the gallbladder to form dietary mixed micelles in which the solvation of poorly absorbed lipophilic drugs and nutraceuticals take place. A comprehensive understanding of the micellization and structure of the mixed micelles are crucial to design effective delivery systems for such substances. In this study, the evolution of the dietary mixed micelle formation under physiologically relevant concentrations and the dependence of structural properties on micelle size were investigated through coarse-grained molecular dynamics simulations. The MARTINI force field was used to model cholate and POPC as the representative bile salt and phospholipid, respectively. The micellization behavior was similar under both fasted and fed state concentrations. Total lipids concentration and the micelle size did not affect the internal structure of the micelles. All the micelles were slightly ellipsoidal in shape independent of their size. The extent of deviation from spherical geometry was found to depend on the micellar POPC/cholate ratio. We also found that the surface and core packing density of the micelles increased with micelle size. The former resulted in more perpendicular alignments of cholates with respect to the surface, while the latter resulted in an improved alignment of POPC tails with the radial direction and more uniform core density.
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Affiliation(s)
- Esra Tuncer
- İzmir Institute of Technology, Food Engineering Department, Gulbahce Campus,Urla, Izmir 35430, Turkey.
| | - Beste Bayramoglu
- İzmir Institute of Technology, Food Engineering Department, Gulbahce Campus,Urla, Izmir 35430, Turkey.
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Vila Verde A, Frenkel D. Kinetics of formation of bile salt micelles from coarse-grained Langevin dynamics simulations. SOFT MATTER 2016; 12:5172-5179. [PMID: 27199094 DOI: 10.1039/c6sm00763e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We examine the mechanism of formation of micelles of dihydroxy bile salts using a coarse-grained, implicit solvent model and Langevin dynamics simulations. We find that bile salt micelles primarily form via addition and removal of monomers, similarly to surfactants with typical head-tail molecular structures, and not via a two-stage mechanism - involving formation of oligomers and their subsequent aggregation to form larger micelles - originally proposed for bile salts. The free energy barrier to removal of single bile monomers from micelles is ≈2kBT, much less than what has been observed for head-tail surfactants. Such a low barrier may be biologically relevant: it allows for rapid release of bile monomers into the intestine, possibly enabling the coverage of fat droplets by bile salt monomers and subsequent release of micelles containing fats and bile salts - a mechanism that is not possible for ionic head-tail surfactants of similar critical micellar concentrations.
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Affiliation(s)
- Ana Vila Verde
- Theory and Bio-Systems Department, Max Planck Institute of Colloids and Interfaces, Wissenschaftspark Golm, 14424 Potsdam, Germany.
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Mukherjee B, Dar AA, Bhat PA, Moulik SP, Das AR. Micellization and adsorption behaviour of bile salt systems. RSC Adv 2016. [DOI: 10.1039/c5ra20909a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Variation of enthalpy change with concentration of binary bile salt mixture.
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Affiliation(s)
- Bedachhanda Mukherjee
- Polymer Science Unit
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Aijaz Ahmad Dar
- Department of Chemistry
- University of Kashmir
- Srinagar-190006
- India
| | | | | | - Akhil Ranjan Das
- Polymer Science Unit
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
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6
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Poša M, Bjedov S, Škorić D, Sakač M. Micellization parameters (number average, aggregation number and critical micellar concentration) of bile salt 3 and 7 ethylidene derivatives: Role of the steroidal skeleton II. Biochim Biophys Acta Gen Subj 2015; 1850:1345-53. [DOI: 10.1016/j.bbagen.2015.03.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Revised: 03/23/2015] [Accepted: 03/24/2015] [Indexed: 01/22/2023]
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7
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Travaglini L, Gubitosi M, di Gregorio MC, Pavel NV, D'Annibale A, Giustini M, Soto Tellini VH, Vázquez Tato J, Obiols-Rabasa M, Bayati S, Galantini L. On the self-assembly of a tryptophan labeled deoxycholic acid. Phys Chem Chem Phys 2015; 16:19492-504. [PMID: 25103526 DOI: 10.1039/c4cp02371d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Self-assembly of peptides and bile acids has been widely investigated because of their biological role and their potential as a tool for the preparation of nanostructured biomaterials. We herein report both the synthesis and the self-association behavior of a compound that combines the aggregation properties of bile acid- and amino acid-based molecules. The derivative has been prepared by introducing a L-tryptophan residue into the C-3 position of the deoxycholic acid skeleton and resulted in an amphoteric fluorescent labeled bile acid that shows a pH-dependent self-assembly. Under alkaline conditions it assembles into 28 nm diameter tubules, thus showing a completely different behavior compared to the precursor bile acid, which forms micelles under similar conditions. Upon heating the tubules break and turn into micelles, leading to an increase in the exposure to water of the tryptophan residue. On the other hand, in acidic solutions it aggregates into elongated micelles that further self-assemble forming a gel network, when an electrolyte is added.
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Affiliation(s)
- Leana Travaglini
- Department of Chemistry, "Sapienza" University of Rome, P. le A. Moro 5, 00185 Rome, Italy.
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Jójárt B, Viskolcz B, Poša M, Fejer SN. Global optimization of cholic acid aggregates. J Chem Phys 2014; 140:144302. [DOI: 10.1063/1.4869832] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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Poša M, Sebenji A. Determination of number-average aggregation numbers of bile salts micelles with a special emphasis on their oxo derivatives—The effect of the steroid skeleton. Biochim Biophys Acta Gen Subj 2014; 1840:1072-82. [DOI: 10.1016/j.bbagen.2013.11.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 10/27/2013] [Accepted: 11/07/2013] [Indexed: 01/22/2023]
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Asaro F, Feruglio L, Galantini L, Nardelli A. 23 Na and 35/37 Cl as NMR probes of growth and shape of sodium taurodeoxycholate micellar aggregates in the presence of NaCl. J Colloid Interface Sci 2013; 392:281-287. [DOI: 10.1016/j.jcis.2012.09.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Revised: 09/18/2012] [Accepted: 09/20/2012] [Indexed: 12/01/2022]
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Manna K, Chang CH, Panda AK. Physicochemical studies on the catanionics of alkyltrimethylammonium bromides and bile salts in aqueous media. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.09.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Poša M, Tepavčević V. Mixed micelles of 7,12-dioxolithocholic acid and selected hydrophobic bile acids: Interaction parameter, partition coefficient of nitrazepam and mixed micelles haemolytic potential. Colloids Surf B Biointerfaces 2011; 86:285-91. [DOI: 10.1016/j.colsurfb.2011.04.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 03/07/2011] [Accepted: 04/06/2011] [Indexed: 11/28/2022]
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Das S, Dey J, Mukhim T, Ismail K. Effect of sodium salicylate, sodium oxalate, and sodium chloride on the micellization and adsorption of sodium deoxycholate in aqueous solutions. J Colloid Interface Sci 2011; 357:434-9. [DOI: 10.1016/j.jcis.2011.02.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2010] [Revised: 02/08/2011] [Accepted: 02/09/2011] [Indexed: 11/16/2022]
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Bortolini O, Bernardi T, Fantin G, Ferretti V, Fogagnolo M. Relative acidity scale of glycine- and taurine-conjugated bile acids through ESI-MS measurements. Steroids 2011; 76:596-602. [PMID: 21371488 DOI: 10.1016/j.steroids.2011.02.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 02/18/2011] [Accepted: 02/18/2011] [Indexed: 11/21/2022]
Abstract
The most important bile acids, in the form of glycine and taurine conjugates, have been ordered in terms of relative acidity scale. The measurements have been carried out using mass spectrometric techniques. The group of taurine conjugates confirm the superior acidity over the glycine derivatives. Rationale of the differences found in gas-phase and comparison with the data reported in solution-phase are discussed with the support of theoretical calculations. The study has been completed with the acidity sequence of mixed oxo-hydroxy bile acids.
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Affiliation(s)
- Olga Bortolini
- Dipartimento di Chimica, Università di Ferrara, Via Borsari 46, 44100 Ferrara, Italy.
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Das S, Thapa U, Ismail K. Aggregation and Adsorption Behaviors of Sodium Deoxycholate in Water–Ethylene Glycol Medium. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2010. [DOI: 10.1246/bcsj.20100152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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16
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Lin S, Blankschtein D. Role of the Bile Salt Surfactant Sodium Cholate in Enhancing the Aqueous Dispersion Stability of Single-Walled Carbon Nanotubes: A Molecular Dynamics Simulation Study. J Phys Chem B 2010; 114:15616-25. [DOI: 10.1021/jp1076406] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shangchao Lin
- Departments of Chemical Engineering and Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Daniel Blankschtein
- Departments of Chemical Engineering and Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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18
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Chuev GN, Fedorov MV. Reference interaction site model study of self-aggregating cyanine dyes. J Chem Phys 2009; 131:074503. [DOI: 10.1063/1.3211948] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Li Y, Li G, Wang X, Li W, Su Z, Zhang Y, Ju Y. Unique Twisted Ribbons Generated by Self-Assembly of Oligo(p-phenylene ethylene) Bearing Dimeric Bile Acid Pendant Groups. Chemistry 2009; 15:6399-407. [DOI: 10.1002/chem.200900484] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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