1
|
Rovnyak D, He J, Kong S, Eckenroad KW, Manley GA, Geffert RM, Krout MR, Strein TG. Determining sequential micellization steps of bile salts with multi-CMC modeling. J Colloid Interface Sci 2023; 644:496-508. [PMID: 37146486 DOI: 10.1016/j.jcis.2023.03.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 03/02/2023] [Accepted: 03/23/2023] [Indexed: 05/07/2023]
Abstract
HYPOTHESIS Bile salts exhibit complex concentration-dependent micellization in aqueous solution, rooted in a long-standing hypothesis of increasing size in bile aggregation that has historically focused on the measurement of only one CMC detected by a given method, without resolving successive stepwise aggregates. Whether bile aggregation is continuous or discrete, at what concentration does the first aggregate form, and how many aggregation steps occur, all remain as open questions. EXPERIMENTS Bile salt critical micelle concentrations (CMCs) were investigated with NMR chemical shift titrations and a multi-CMC phase separation modeling approach developed herein. The proposed strategy is to establish a correspondence of the phase separation and mass action models to treat the first CMC; subsequent micellization steps, involving larger micelles, are then treated as phase separation events. FINDINGS The NMR data and the proposed multi-CMC model reveal and resolve multiple closely spaced sequential preliminary, primary, and secondary discrete CMCs in dihydroxy and trihydroxy bile salt systems in basic (pH 12) solutions with a single model of one NMR data set. Complex NMR data are closely explained by the model. Four CMCs are established in deoxycholate below 100 mM (298 K, pH 12): 3.8 ± 0.5 mM, 9.1 ± 0.3 mM, 27 ± 2 mM, and 57 ± 4 mM, while three CMCs were observed in multiple bile systems, also under basic conditions. Global fitting leverages the sensitivity of different protons to different aggregation stages. In resolving these closely spaced CMCs, the method also obtains chemical shifts of these spectroscopically inaccessible (aka dark) states of the distinct micelles.
Collapse
Affiliation(s)
- David Rovnyak
- Dent Drive, Department of Chemistry, Bucknell University, Lewisburg, PA 17837, USA.
| | - Jiayi He
- University of Pennsylvania, Department of Chemistry, 231 S. 34 Street, Philadelphia, PA 19104-6323, USA.
| | - Sophie Kong
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of California San Francisco, 1700 4th St, San Francisco, CA 94158, USA.
| | - Kyle W Eckenroad
- Bristol Myers Squibb, 1 Squibb Drive, 92-218 New Brunswick, NJ 08901, USA.
| | - Gregory A Manley
- AB SCIEX LLC, 500 Old Connecticut Path, Framingham, MA 01701, USA
| | - Raeanne M Geffert
- The University of North Carolina at Chapel Hill, UNC Eshelman School of Pharmacy, Division of Pharmacotherapy and Experimental Therapeutics, Kerr Hall, Campus Box 7569, Chapel Hill, NC 27599-7569, USA
| | - Michael R Krout
- Dent Drive, Department of Chemistry, Bucknell University, Lewisburg, PA 17837, USA.
| | - Timothy G Strein
- Dent Drive, Department of Chemistry, Bucknell University, Lewisburg, PA 17837, USA.
| |
Collapse
|
2
|
Wei Y, Zhang J, Liu X. Surfactant-Assisted Assembly of Dipeptide Forming a Broom-like Structure. Molecules 2022; 27:molecules27154876. [PMID: 35956826 PMCID: PMC9369827 DOI: 10.3390/molecules27154876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 07/26/2022] [Accepted: 07/27/2022] [Indexed: 11/16/2022] Open
Abstract
Understanding the influence of surfactants on the assembly of peptides has a considerable practical motivation. In this paper, we systematically study the anionic surfactant-assisted assembly of diphenylalanine (FF). FF forms broom-like structures in a concentration of sodium cholate (NaC) around the CMC, and assembles into linear and unidirectional rods in the presence of low and high surfactant concentrations. FF’s improved hydrogen bonding and controlled assembly rates are appropriate for other anionic surfactants. At this stage, the use of FF as the simplest protein consequence can be helpful in the investigation of further protein–surfactant interactions.
Collapse
|
3
|
Yang D, Li L, Wei X, Wang Y, Zhou W, Kataura H, Xie S, Liu H. Submilligram-scale separation of near-zigzag single-chirality carbon nanotubes by temperature controlling a binary surfactant system. SCIENCE ADVANCES 2021; 7:7/8/eabe0084. [PMID: 33597241 PMCID: PMC7888923 DOI: 10.1126/sciadv.abe0084] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 12/31/2020] [Indexed: 05/19/2023]
Abstract
Mass production of zigzag and near-zigzag single-wall carbon nanotubes (SWCNTs), whether by growth or separation, remains a challenge, which hinders the disclosure of their previously unknown property and practical applications. Here, we report a method to separate SWCNTs by chiral angle through temperature control of a binary surfactant system of sodium cholate (SC) and SDS in gel chromatography. Eleven types of single-chirality SWCNT species with chiral angle less than 20° were efficiently separated including multiple zigzag and near-zigzag species. Among them, (7, 3), (8, 3), (8, 4), (9, 1), (9, 2), (10, 2), and (11, 1), were produced on the submilligram scale. The spectral detection results indicate that lowering the temperature induced selective adsorption and reorganization of the SC/SDS cosurfactants on SWCNTs with different chiral angles, amplifying their interaction difference with gel. We believe that this work is an important step toward industrial separation of single-chirality zigzag and near-zigzag SWCNTs.
Collapse
Affiliation(s)
- Dehua Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China
| | - Linhai Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaojun Wei
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Yanchun Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China
| | - Weiya Zhou
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hiromichi Kataura
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8565, Japan
| | - Sishen Xie
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huaping Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
4
|
Sharma P, Sohal N, Maity B. Encapsulation and release of non-fluorescent crystal violet confined in bile-salt aggregates. RSC Adv 2021; 11:10912-10921. [PMID: 35423564 PMCID: PMC8695816 DOI: 10.1039/d0ra06599d] [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: 07/30/2020] [Accepted: 03/02/2021] [Indexed: 11/21/2022] Open
Abstract
In this work, the entrapment of non-fluorescent dye Crystal Violet (CV) in presence of bio-mimetic confined bile-salt aggregates has been studied. The photophysical characteristic properties of CV have been carried out by changing different kinds of hydrophilic head groups and hydrophobic skeletons of bile-salt aggregates (NaC, NaDC, NaTC and NaTGC). The main aim of this work is to modulate the solubility behaviour, fluorescence properties and elucidation of different kinds of non-covalent interaction of CV confined in bile-salt aggregates. To interpret the result, steady state absorption and fluorescence emission techniques have been employed. In aqueous buffer, the CV molecule is non-fluorescent in nature. The value of fluorescence quantum yield (Φ) is ∼10−4. It has been observed that CV confined in bile-salt aggregates becomes highly fluorescent in nature. The enhancement of ‘Φ’ value of CV in bile-salt aggregates is ∼1000 fold compared to that of aqueous buffer medium. It has also been observed that in the presence of different bile-salt aggregates, CV exhibits remarkable enhancement of absorption and fluorescence emission spectral behaviour. The ground state and the excited state binding constant values of CV in the presence of different bile-salt aggregates have been determined. Moreover, the release of the dye molecule from the confined bile-salt aggregates to the aqueous medium has been executed. It has been found that addition of a very minute concentration of KCl salt (100 nm) to the bile-salt aggregates leads to extreme modification of their photophysical properties of CV. The absorption, fluorescence intensity, fluorescence quantum yield, ground state and excited state binding constant values, partition coefficient and aggregation number of CV molecules entrapped in bile-salt aggregates significantly reduces by addition of KCl. This result clearly confirms that CV releases from the confined system to the aqueous medium. In this work, the entrapment of non-fluorescent dye Crystal Violet (CV) in presence of bio-mimetic confined bile-salt aggregates has been studied.![]()
Collapse
Affiliation(s)
- Prachi Sharma
- School of Chemistry and Biochemistry
- Thapar Institute of Engineering and Technology
- Patiala 147004
- India
| | - Neeraj Sohal
- School of Chemistry and Biochemistry
- Thapar Institute of Engineering and Technology
- Patiala 147004
- India
| | - Banibrata Maity
- School of Chemistry and Biochemistry
- Affiliate Faculty-TIET-Virginia Tech Center of Excellence in Emerging Materials
- Thapar Institute of Engineering and Technology
- Patiala-147004
- India
| |
Collapse
|
5
|
Hoffmann MM, Too MD, Vogel M, Gutmann T, Buntkowsky G. Breakdown of the Stokes-Einstein Equation for Solutions of Water in Oil Reverse Micelles. J Phys Chem B 2020; 124:9115-9125. [PMID: 32924487 DOI: 10.1021/acs.jpcb.0c06124] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An experimental study is presented for the reverse micellar system of 15% by mass polydisperse hexaethylene glycol monodecylether (C10E6) in cyclohexane with varying amounts of added water up to 4% by mass. Measurements of viscosity and self-diffusion coefficients were taken as a function of temperature between 10 and 45 °C at varying sample water loads but fixed C10E6/cyclohexane composition. The results were used to inspect the validity of the Stokes-Einstein equation for this system. Unreasonably small reverse average micelle radii and aggregation numbers were obtained with the Stokes-Einstein equation, but reasonable values for these quantities were obtained using the ratio of surfactant-to-cyclohexane self-diffusion coefficients. While bulk viscosity increased with increasing water load, a concurrent expected decrease of self-diffusion coefficient was only observed for the surfactant and water but not for cyclohexane, which showed independence of water load. Moreover, a spread of self-diffusion coefficients was observed for the protons associated with the ethylene oxide repeat unit in samples with polydisperse C10E6 but not in a sample with monodisperse C10E6. These findings were interpreted by the presence of reverse micelle to reverse micelle hopping motions that with higher water load become increasingly selective toward C10E6 molecules with short ethylene oxide repeat units, while those with long ethylene oxide repeat units remain trapped within the reverse micelle because of the increased hydrogen bonding interactions with the water inside the growing core of the reverse micelle. Despite the observed breakdown of the Stokes-Einstein equation, the temperature dependence of the viscosities and self-diffusion coefficients was found to follow Arrhenius behavior over the investigated range of temperatures.
Collapse
Affiliation(s)
- Markus M Hoffmann
- Department of Chemistry and Biochemistry, State University of New York College at Brockport, Brockport, New York 14420, United States
| | - Matthew D Too
- Department of Chemistry and Biochemistry, State University of New York College at Brockport, Brockport, New York 14420, United States
| | - Michael Vogel
- Institute of Condensed Matter Physics, Technical University Darmstadt, Hochschulstraße 6, Darmstadt 64289, Germany
| | - Torsten Gutmann
- Institute of Physical Chemistry, Technical University Darmstadt, Alarich-Weiss-Straße 8, Darmstadt D-64287, Germany
| | - Gerd Buntkowsky
- Institute of Physical Chemistry, Technical University Darmstadt, Alarich-Weiss-Straße 8, Darmstadt D-64287, Germany
| |
Collapse
|
6
|
Moriyama Y, Takeda K. Removal of Dodecyl Sulfate Ions Bound to Human and Bovine Serum Albumins Using Sodium Cholate. J Oleo Sci 2020; 69:65-72. [PMID: 31902896 DOI: 10.5650/jos.ess19224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The secondary structures of human serum albumin (HSA) and bovine serum albumin (BSA) were disrupted in the solution of sodium dodecyl sulfate (SDS), while being hardly damaged in the solution of the bile salt, sodium cholate (NaCho). In the present work, the removal of dodecyl sulfate (DS) ions bound to these proteins was attempted by adding various amounts of NaCho. The extent of removal was estimated by the restoration of α-helical structure of each protein disrupted by SDS. Increases and decreases in α-helical structure were examined using the mean residue ellipticity at 222 nm, [θ]222, which was frequently used as a measure of α-helical structure content. The magnitudes of [θ]222 of HSA and BSA, weakened by SDS, were restrengthened upon the addition of NaCho. This indicated that the α-helical structures of HSA and BSA that were disrupted by the binding of DS ions were nearly reformed by the addition of NaCho. The NaCho concentration at which the maximum restoration of [θ]222 of each protein was attained increased nearly linearly with SDS concentration. These results indicated that most of the bound DS ions were removed from the proteins but the removal was incomplete. The removal of DS ions, examined by means of the equilibrium dialysis, was also incomplete. The α-helical structure restoration and the DS ion removal by NaCho were considered to be due to the ability of cholate anions to strip the surfactant ions bound to HSA and BSA. These stripped DS ions appeared to be more likely to form SDS-NaCho mixed micelles in bulk rather than SDS-NaCho mixed aggregates on the proteins.
Collapse
Affiliation(s)
- Yoshiko Moriyama
- Department of Applied Chemistry and Biotechnology, Okayama University of Science
| | - Kunio Takeda
- Department of Applied Chemistry and Biotechnology, Okayama University of Science
| |
Collapse
|
7
|
Gillen AJ, Siefman DJ, Wu SJ, Bourmaud C, Lambert B, Boghossian AA. Templating colloidal sieves for tuning nanotube surface interactions and optical sensor responses. J Colloid Interface Sci 2019; 565:55-62. [PMID: 31931299 DOI: 10.1016/j.jcis.2019.12.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 12/11/2019] [Accepted: 12/15/2019] [Indexed: 12/15/2022]
Abstract
Surfactants offer a tunable approach for modulating the exposed surface area of a nanoparticle. They further present a scalable and cost-effective means for suspending single-walled carbon nanotubes (SWCNTs), which have demonstrated practical use as fluorescence sensors. Though surfactant suspensions show record quantum yields for SWCNTs in aqueous solutions, they lack the selectivity that is vital for optical sensing. We present a new method for controlling the selectivity of optical SWCNT sensors through colloidal templating of the exposed surface area. Colloidal nanotube sensors were obtained using various concentrations of sodium cholate, and their performances were compared to DNA-SWCNT optical sensors. Sensor responses were measured against a library of bioanalytes, including neurotransmitters, amino acids, and sugars. We report an intensity response towards dopamine and serotonin for all sodium cholate-suspended SWCNT concentrations. We further identify a selective, 14.1 nm and 10.3 nm wavelength red-shifting response to serotonin for SWCNTs suspended in 1.5 and 0.5 mM sodium cholate, respectively. Through controlled, adsorption-based tuning of the nanotube surface, this study demonstrates the applicability of sub-critical colloidal suspensions to achieve selectivities exceeding those previously reported for DNA-SWCNT sensors.
Collapse
Affiliation(s)
- Alice J Gillen
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Daniel J Siefman
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Institute of Physics (IPHYS), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Shang-Jung Wu
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Claire Bourmaud
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Benjamin Lambert
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | | |
Collapse
|
8
|
Park M, Salem DP, Parviz D, Gong X, Silmore KS, Lew TTS, Khong DT, Ang MCY, Kwak SY, Chan-Park MB, Strano MS. Measuring the Accessible Surface Area within the Nanoparticle Corona Using Molecular Probe Adsorption. NANO LETTERS 2019; 19:7712-7724. [PMID: 31565943 PMCID: PMC7206615 DOI: 10.1021/acs.nanolett.9b02647] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The corona phase-the adsorbed layer of polymer, surfactant, or stabilizer molecules around a nanoparticle-is typically utilized to disperse nanoparticles into a solution or solid phase. However, this phase also controls molecular access to the nanoparticle surface, a property important for catalytic activity and sensor applications. Unfortunately, few methods can directly probe the structure of this corona phase, which is subcategorized as either a hard, immobile corona or a soft, transient corona in exchange with components in the bulk solution. In this work, we introduce a molecular probe adsorption (MPA) method for measuring the accessible nanoparticle surface area using a titration of a quenchable fluorescent molecule. For example, riboflavin is utilized to measure the surface area of gold nanoparticle standards, as well as corona phases on dispersed single-walled carbon nanotubes and graphene sheets. A material balance on the titration yields certain surface coverage parameters, including the ratio of the surface area to dissociation constant of the fluorophore, q/KD, as well as KD itself. Uncertainty, precision, and the correlation of these parameters across different experimental systems, preparations, and modalities are all discussed. Using MPA across a series of corona phases, we find that the Gibbs free energy of probe binding scales inversely with the cube root of surface area, q. In this way, MPA is the only technique to date capable of discerning critical structure-property relationships for such nanoparticle surface phases. Hence, MPA is a rapid quantitative technique that should prove useful for elucidating corona structure for nanoparticles across different systems.
Collapse
Affiliation(s)
- Minkyung Park
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Daniel P Salem
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Dorsa Parviz
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Xun Gong
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Kevin S Silmore
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Tedrick Thomas Salim Lew
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Duc Thinh Khong
- Disruptive & Sustainable Technologies for Agricultural Precision IRG , Singapore-MIT Alliance for Research and Technology , 1 Create Way , Singapore 138602 , Singapore
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62, Nanyang Drive , Singapore 637459 , Singapore
| | - Mervin Chun-Yi Ang
- Disruptive & Sustainable Technologies for Agricultural Precision IRG , Singapore-MIT Alliance for Research and Technology , 1 Create Way , Singapore 138602 , Singapore
| | - Seon-Yeong Kwak
- Department of Biosystems and Biomaterials Science and Engineering , Seoul National University , Seoul 08826 , Republic of Korea
| | - Mary B Chan-Park
- Disruptive & Sustainable Technologies for Agricultural Precision IRG , Singapore-MIT Alliance for Research and Technology , 1 Create Way , Singapore 138602 , Singapore
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62, Nanyang Drive , Singapore 637459 , Singapore
| | - Michael S Strano
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| |
Collapse
|
9
|
Hoffmann MM, Bothe S, Gutmann T, Buntkowsky G. Combining Freezing Point Depression and Self-Diffusion Data for Characterizing Aggregation. J Phys Chem B 2018; 122:4913-4921. [PMID: 29668278 DOI: 10.1021/acs.jpcb.8b03456] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The colligative property freezing point depression is evaluated as a means for estimating the extent of aggregation for solutions of poly(ethylene oxide) alcohol (C10E6) nonionic surfactant in cyclohexane. Combined with additional measurements of self-diffusion coefficients, it is shown that both unaggregated C10E6 as well as reverse micelles are significantly present for the entire range of measured C10E6 concentration (0.048-2.35 mol kg-1). A change in speciation near 0.2 mol kg-1 is indicated by the results from both freezing point depression and self-diffusion coefficient measurements. It is shown that average reverse micelle radii and aggregation numbers obtained from the ratio of solvent and C10E6 self-diffusion coefficients are consistent with prior reported results. However, unreasonably small radii for the reverse micelles as well as for the cyclohexane were obtained from analysis of the results by the Stokes-Einstein equation using additional measured solution viscosities. The concentration of reverse micelles and unaggregated C10E6 was calculated from the freezing point depression results using the aggregation numbers obtained from ratio of self-diffusion coefficients. These concentrations indicate that the reverse micelles become smaller in average size and increase in number with increasing temperature without an increase in unaggregated C10E6.
Collapse
Affiliation(s)
- Markus M Hoffmann
- Department of Chemistry and Biochemistry , The College at Brockport, State University of New York , Brockport , New York 14420 , United States
| | - Sarah Bothe
- Institute of Physical Chemistry , Technical University Darmstadt , Alarich-Weiss-Straße 8 , D-64287 Darmstadt , Germany
| | - Torsten Gutmann
- Institute of Physical Chemistry , Technical University Darmstadt , Alarich-Weiss-Straße 8 , D-64287 Darmstadt , Germany
| | - Gerd Buntkowsky
- Institute of Physical Chemistry , Technical University Darmstadt , Alarich-Weiss-Straße 8 , D-64287 Darmstadt , Germany
| |
Collapse
|
10
|
De Leo V, Milano F, Mancini E, Comparelli R, Giotta L, Nacci A, Longobardi F, Garbetta A, Agostiano A, Catucci L. Encapsulation of Curcumin-Loaded Liposomes for Colonic Drug Delivery in a pH-Responsive Polymer Cluster Using a pH-Driven and Organic Solvent-Free Process. Molecules 2018; 23:E739. [PMID: 29570636 PMCID: PMC6017095 DOI: 10.3390/molecules23040739] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/09/2018] [Accepted: 03/21/2018] [Indexed: 01/08/2023] Open
Abstract
The present study aimed to develop and optimize liposome formulation for the colonic delivery of biologically active compounds. A strategy to facilitate such targeting is to formulate liposomes with a polymer coating sensitive to the pH shifts in the gastrointestinal tract. To this end, liposomes encapsulating curcumin-chosen as the biologically active compound model-and coated with the pH-responsive polymer Eudragit S100 were prepared and characterized. Curcumin was encapsulated into small unilamellar vesicles (SUVs) by the micelle-to-vesicle transition method (MVT) in a simple and organic solvent-free way. Curcumin-loaded liposomes were coated with Eudragit S100 by a fast and easily scalable pH-driven method. The prepared liposomes were evaluated for size, surface morphology, entrapment efficiency, stability, in vitro drug release, and curcumin antioxidant activity. In particular, curcumin-loaded liposomes displayed size lower than 100 nm, encapsulation efficiency of 98%, high stability at both 4 °C and 25 °C, high in vitro antioxidant activity, and a cumulative release that was completed within 200 min. A good Eudragit S100 coating which did not alter the properties of the curcumin-loaded liposomes was obtained. The present work therefore provides a fast and solvent-free method to prepare pH-responsive polymer-coated liposomes for the colonic delivery of biologically active compounds.
Collapse
Affiliation(s)
- Vincenzo De Leo
- Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari, Italy.
- CNR-IPCF Institute for Physical and Chemical Processes, Bari unit, Via Orabona 4, 70126 Bari, Italy.
| | - Francesco Milano
- CNR-IPCF Institute for Physical and Chemical Processes, Bari unit, Via Orabona 4, 70126 Bari, Italy.
| | - Erminia Mancini
- Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari, Italy.
| | - Roberto Comparelli
- CNR-IPCF Institute for Physical and Chemical Processes, Bari unit, Via Orabona 4, 70126 Bari, Italy.
| | - Livia Giotta
- Department of Biological and Environmental Sciences and Technologies, University of Salento, SP Lecce-Monteroni, I-73100 Lecce, Italy.
| | - Angelo Nacci
- Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari, Italy.
- CNR-ICCOM Institute of chemistry of organometallic compounds, Bari unit, Via E. Orabona, 4, 70126 Bari, Italy.
| | | | - Antonella Garbetta
- CNR-ISPA Institute of Sciences of Food Production, Via G. Amendola 122/O, 70125 Bari, Italy.
| | - Angela Agostiano
- Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari, Italy.
- CNR-IPCF Institute for Physical and Chemical Processes, Bari unit, Via Orabona 4, 70126 Bari, Italy.
| | - Lucia Catucci
- Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari, Italy.
- CNR-IPCF Institute for Physical and Chemical Processes, Bari unit, Via Orabona 4, 70126 Bari, Italy.
| |
Collapse
|
11
|
Gubitosi M, D'Annibale A, Schillén K, Olsson U, Pavel NV, Galantini L. On the stability of lithocholate derivative supramolecular tubules. RSC Adv 2017. [DOI: 10.1039/c6ra26092f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Solubility and calorimetry data provide the description of a phase map for metastable supramolecular nanotubes of biological origin.
Collapse
Affiliation(s)
- M. Gubitosi
- Department of Chemistry
- “Sapienza” University of Rome
- 00185 Rome
- Italy
- Division of Physical Chemistry
| | - A. D'Annibale
- Department of Chemistry
- “Sapienza” University of Rome
- 00185 Rome
- Italy
| | - K. Schillén
- Division of Physical Chemistry
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
| | - U. Olsson
- Division of Physical Chemistry
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
| | - N. V. Pavel
- Department of Chemistry
- “Sapienza” University of Rome
- 00185 Rome
- Italy
| | - L. Galantini
- Department of Chemistry
- “Sapienza” University of Rome
- 00185 Rome
- Italy
| |
Collapse
|
12
|
Chauhan S, Sharma V, Singh K, M.S.Chauhan, Singh K. Influence of lactose on the micellar behaviour and surface activity of bile salts as revealed through fluorescence and surface tension studies at varying temperatures. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.07.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
13
|
Bergler FF, Stahl S, Goy A, Schöppler F, Hertel T. Substrate-Mediated Cooperative Adsorption of Sodium Cholate on (6,5) Single-Wall Carbon Nanotubes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:9598-603. [PMID: 27575847 DOI: 10.1021/acs.langmuir.6b02759] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The interaction of sodium cholate (NaC) with (6,5) single-wall carbon nanotubes (SWNTs) is investigated using photoluminescence spectroscopy. Dilution of SWNT-NaC suspensions is accompanied by changes in the exciton PL quantum yield and peak emission energy. An abrupt change of the exciton emission peak energy at NaC concentrations between 10 and 14 mM indicates strongly cooperative formation of a micellar phase on (6,5) SWNT surfaces with a Hill coefficient of nH = 65 ± 6. This is in contrast to the formation of free NaC micelles with aggregation numbers of only about 4 and suggests that the cooperativity of NaC micelle formation on nanotube surfaces is strongly substrate-enhanced. The temperature dependence of this previously unobserved transition is used for a determination of ΔmicG(⊖)/(1 + β) = -(11.4 ± 0.2) kJ·mol(-1) which, for typical Na(+) counterion binding with β ≈ 0.2, yields a free SWNT-NaC micellization enthalpy ΔmicG(⊖) of -13.7 kJ·mol(-1).
Collapse
Affiliation(s)
- Felix F Bergler
- Institute of Physical and Theoretical Chemistry and ‡Röntgen Research Center for Complex Material Systems, Julius-Maximilian University Würzburg , 97070 Würzburg, Germany
| | - Sabine Stahl
- Institute of Physical and Theoretical Chemistry and ‡Röntgen Research Center for Complex Material Systems, Julius-Maximilian University Würzburg , 97070 Würzburg, Germany
| | - Annika Goy
- Institute of Physical and Theoretical Chemistry and ‡Röntgen Research Center for Complex Material Systems, Julius-Maximilian University Würzburg , 97070 Würzburg, Germany
| | - Friedrich Schöppler
- Institute of Physical and Theoretical Chemistry and ‡Röntgen Research Center for Complex Material Systems, Julius-Maximilian University Würzburg , 97070 Würzburg, Germany
| | - Tobias Hertel
- Institute of Physical and Theoretical Chemistry and ‡Röntgen Research Center for Complex Material Systems, Julius-Maximilian University Würzburg , 97070 Würzburg, Germany
| |
Collapse
|
14
|
Mustan F, Ivanova A, Madjarova G, Tcholakova S, Denkov N. Molecular Dynamics Simulation of the Aggregation Patterns in Aqueous Solutions of Bile Salts at Physiological Conditions. J Phys Chem B 2015; 119:15631-43. [PMID: 26605858 DOI: 10.1021/acs.jpcb.5b07063] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Classical molecular dynamics simulations are employed to monitor the aggregation behavior of six bile salts (nonconjugated and glycine- and taurine-conjugated sodium cholate and sodium deoxycholate) with concentration of 10 mM in aqueous solution in the presence of 120 mM NaCl. There are 150 ns trajectories generated to characterize the systems. The largest stable aggregates are analyzed to determine their shape, size, and stabilizing forces. It is found that the aggregation is a hierarchical process and that its kinetics depends both on the number of hydroxyl groups in the steroid part of the molecules and on the type of conjugation. The micelles of all salts are similar in shape-deformed spheres or ellipsoids, which are stabilized by hydrophobic forces, acting between the steroid rings. The differences in the aggregation kinetics of the various conjugates are rationalized by the affinity for hydrogen bond formation for the glycine-modified salts or by the longer time needed to achieve optimum packing for the tauro derivatives. Evidence is provided for the hypothesis from the literature that the entirely hydrophobic core of all aggregates and the enhanced dynamics of the molecules therein should be among the prerequisites for their pronounced solubilization capacity for hydrophobic substances in vivo.
Collapse
Affiliation(s)
- Fatmegyul Mustan
- Department of Chemical and Pharmaceutical Engineering, and ‡Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia , 1 James Bourchier Avenue, 1164 Sofia, Bulgaria
| | - Anela Ivanova
- Department of Chemical and Pharmaceutical Engineering, and ‡Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia , 1 James Bourchier Avenue, 1164 Sofia, Bulgaria
| | - Galia Madjarova
- Department of Chemical and Pharmaceutical Engineering, and ‡Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia , 1 James Bourchier Avenue, 1164 Sofia, Bulgaria
| | - Slavka Tcholakova
- Department of Chemical and Pharmaceutical Engineering, and ‡Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia , 1 James Bourchier Avenue, 1164 Sofia, Bulgaria
| | - Nikolai Denkov
- Department of Chemical and Pharmaceutical Engineering, and ‡Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia , 1 James Bourchier Avenue, 1164 Sofia, Bulgaria
| |
Collapse
|
15
|
Peng S, Hao K, Han F, Tang Z, Niu B, Zhang X, Wang Z, Hong S. Enhanced removal of bisphenol-AF onto chitosan-modified zeolite by sodium cholate in aqueous solutions. Carbohydr Polym 2015; 130:364-71. [DOI: 10.1016/j.carbpol.2015.05.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 04/21/2015] [Accepted: 05/05/2015] [Indexed: 11/30/2022]
|
16
|
A tryptophan-substituted cholic acid: Expanding the family of labelled biomolecules. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.03.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
17
|
Olesen NE, Westh P, Holm R. Determination of thermodynamic potentials and the aggregation number for micelles with the mass-action model by isothermal titration calorimetry: A case study on bile salts. J Colloid Interface Sci 2015; 453:79-89. [PMID: 25978555 DOI: 10.1016/j.jcis.2015.03.069] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/28/2015] [Accepted: 03/30/2015] [Indexed: 01/04/2023]
Abstract
The aggregation number (n), thermodynamic potentials (ΔG, ΔH, ΔS) and critical micelle concentration (CMC) for 6 natural bile salts were determined on the basis of both original and previously published isothermal titration calorimetry (ITC) data. Different procedures to estimate parameters of micelles with ITC were compared to a mass-action model (MAM) of reaction type: n⋅S⇌Mn. This analysis can provide guidelines for future ITC studies of systems behaving in accordance with this model such as micelles and proteins that undergo self-association to oligomers. Micelles with small aggregation numbers, as those of bile salts, are interesting because such small aggregates cannot be characterized as a separate macroscopic phase and the widely applied pseudo-phase model (PPM) is inaccurate. In the present work it was demonstrated that the aggregation number of micelles was constant at low concentrations enabling determination of the thermodynamic potentials by the MAM. A correlation between the aggregation number and the heat capacity was found, which implies that the dehydrated surface area of bile salts increases with the aggregation number. This is in accordance with Tanford's principles of opposing forces where neighbouring molecules in the aggregate are better able to shield from the surrounding hydrophilic environment when the aggregation number increases.
Collapse
Affiliation(s)
- Niels Erik Olesen
- Biologics and Pharmaceutical Science, H. Lundbeck A/S, Ottiliavej 9, DK-2500 Valby, Denmark; NSM, Research Unit for Functional Biomaterials, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
| | - Peter Westh
- NSM, Research Unit for Functional Biomaterials, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
| | - René Holm
- Biologics and Pharmaceutical Science, H. Lundbeck A/S, Ottiliavej 9, DK-2500 Valby, Denmark.
| |
Collapse
|
18
|
Sarkar I, Malini H, Das TM, Mishra AK. Synthesis and evaluation of a glucose attached pyrene, as a fluorescent molecular probe in sugar and non-sugar based micro-heterogeneous media. RSC Adv 2015. [DOI: 10.1039/c5ra11481k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A new fluorescent pyrene–glucose conjugate (pyd-glc), 1-(4,6-O-butylidene-β-d-glucopyranosyl)-4-(1-pyrene)-butan-2-one, has been synthesized by attaching a pyrene molecule to acetal (butylidene) protected glucose via a butane-2-one linker.
Collapse
Affiliation(s)
- Ivy Sarkar
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai – 600 036
- India
| | - Hema Malini
- Department of Organic Chemistry
- University of Madras
- Chennai – 600 025
- India
| | | | - Ashok Kumar Mishra
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai – 600 036
- India
| |
Collapse
|
19
|
Mahfud R, Lacks D, Ishida H, Qutubuddin S. Molecular dynamic simulations of self-assembly of amphiphilic comb-like anionic polybenzoxazines. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11858-11865. [PMID: 25222627 DOI: 10.1021/la501466z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Fully atomistic molecular dynamic simulations were performed to address the self-assembly of amphiphilic and comb-like polybenzoxazines (iBnXz) in water, with i = 3 (trimer), i = 4 (tetramer); i = 6 (hexamer), i = 8 (octamer), and i = 10 (decamer). Spontaneous aggregation of these comb-like polybenzoxazine molecules into a single micelle occurs in the simulations. The simulations show that molecular size and concentration play important roles in micellar morphology. At an iBnXz concentration of 50 mM, the 3BnXz and 4BnXz molecules aggregate into spherical micelles, whereas the 6BnXz, 8BnXz, and 10BnXz molecules aggregate into cylindrical micelles. The micellar morphology is spherical at low concentrations, but undergoes a transition to cylindrical shape as concentration increases. The transition point depends on the molecular size-both the true size as indicated by molecular weight, as well as an additional effective size dependent on molecular flexibility.
Collapse
Affiliation(s)
- Riyad Mahfud
- Department of Chemical Engineering and ‡Department of Macromolecular Science and Engineering, Case Western Reserve University , Cleveland, Ohio 44106-7202, United States
| | | | | | | |
Collapse
|
20
|
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
|
21
|
Naskar B, Mondal S, Moulik SP. Amphiphilic activities of anionic sodium cholate (NaC), zwitterionic 3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate (CHAPS) and their mixtures: A comparative study. Colloids Surf B Biointerfaces 2013; 112:155-64. [DOI: 10.1016/j.colsurfb.2013.07.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 06/27/2013] [Accepted: 07/15/2013] [Indexed: 11/30/2022]
|
22
|
Mandal S, Ghosh S, Banik D, Banerjee C, Kuchlyan J, Sarkar N. An Investigation into the Effect of the Structure of Bile Salt Aggregates on the Binding Interactions and ESIHT Dynamics of Curcumin: A Photophysical Approach To Probe Bile Salt Aggregates as a Potential Drug Carrier. J Phys Chem B 2013; 117:13795-807. [PMID: 24102639 DOI: 10.1021/jp407824t] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Sarthak Mandal
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Surajit Ghosh
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Debasis Banik
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Chiranjib Banerjee
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Jagannath Kuchlyan
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Nilmoni Sarkar
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| |
Collapse
|
23
|
Patra D, Ahmadieh D, Aridi R. Study on interaction of bile salts with curcumin and curcumin embedded in dipalmitoyl-sn-glycero-3-phosphocholine liposome. Colloids Surf B Biointerfaces 2013; 110:296-304. [PMID: 23732808 DOI: 10.1016/j.colsurfb.2013.04.027] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 04/19/2013] [Accepted: 04/22/2013] [Indexed: 12/22/2022]
Abstract
Curcumin, often used as a food spice, is a natural polyphenol that has various medicinal benefits such as anti-cancer, anti-amyloid, anti-oxidant, and anti-inflammatory properties, among others. The interaction between bile salts having physiological significance and curcumin suggests the aggregation of bile salts dramatically alters the absorption and fluorescence parameters of curcumin. The fluorescence emission maximum as well as the intensity can easily detect critical micellar concentration of sodium cholate and sodium deoxycholate respectively to be 16 and 6mM at room temperature. The mechanism of interaction of curcumin with bile salts has been presented at low, intermediate and high bile salt concentrations and depends on temperature. In the presence of bile salts the DPPH scavenging activity was preserved, though less than in the presence of curcumin alone. The effect of submicellar concentration, 5-50μM, of bile salt with 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) liposomes in solid gel and liquid crystalline phases has been investigated using curcumin as an embedded probe in the membrane. The curcumin based fluorescence probing method indicates even at very low concentration, ∼5μM, incorporation of monomeric bile salt molecules disorders the membrane properties. Expulsion of curcumin from the membrane in the presence of bile salt is ruled out, suggesting wetting of membrane. Alteration of membrane fluidity by bile salts is found to have an opposing effect in the liquid crystalline phase compared to in the solid gel phase, and is sensitive to the nature of bile salt. The permeability in the liquid crystalline phase decreases in the presence of bile salt. The phase transition temperature of the membrane is influenced by bile salt.
Collapse
Affiliation(s)
- Digambara Patra
- Department of Chemistry, American University of Beirut, Beirut, Lebanon.
| | | | | |
Collapse
|
24
|
Bile salts and their importance for drug absorption. Int J Pharm 2013; 453:44-55. [PMID: 23598075 DOI: 10.1016/j.ijpharm.2013.04.003] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 04/04/2013] [Accepted: 04/05/2013] [Indexed: 11/21/2022]
Abstract
Bile salts are present in the intestines of humans as well as the animals used during the development of pharmaceutical products. This review provides a short introduction into the physical chemical properties of bile salts, a description of the bile concentration and composition of bile in different animal species and an overview of the literature investigating the influence of bile salts on the in vivo performance of different compounds and drug formulations. Generally, there is a positive effect on bioavailability when bile is present in the gastro-intestinal tract, independent of the formulation systems, e.g. suspensions, solutions, cyclodextrin complexes or lipid based formulations, but a few exceptions have also been reported.
Collapse
|
25
|
A fluorescence parameter based analysis on the solubilization of carvedilol by bile salt media. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2012; 116:105-13. [DOI: 10.1016/j.jphotobiol.2012.08.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 08/06/2012] [Accepted: 08/06/2012] [Indexed: 11/22/2022]
|
26
|
Kroflič A, Sarac B, Bešter-Rogač M. Thermodynamic characterization of 3-[(3-cholamidopropyl)-dimethylammonium]-1-propanesulfonate (CHAPS) micellization using isothermal titration calorimetry: temperature, salt, and pH dependence. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10363-10371. [PMID: 22686523 DOI: 10.1021/la302133q] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A systematic investigation of the micellization process of a biocompatible zwitterionic surfactant 3-[(3-cholamidopropyl)-dimethylammonium]-1-propanesulfonate (CHAPS) has been carried out by isothermal titration calorimetry (ITC) at temperatures between 278.15 K and 328.15 K in water, aqueous NaCl (0.1, 0.5, and 1 M), and buffer solutions (pH = 3.0, 6.8, and 7.8). The effect of different cations and anions on the micellization of CHAPS surfactant has been also examined in LiCl, CsCl, NaBr, and NaI solutions at 308.15 K. It turned out that the critical micelle concentration, cmc, is only slightly shifted toward lower values in salt solutions, whereas in buffer media it remains similar to its value in water. From the results obtained, it could be assumed that CHAPS behaves as a weakly charged cationic surfactant in salt solutions and as a nonionic surfactant in water and buffer medium. Conventional surfactants alike, CHAPS micellization is endothermic at low and exothermic at high temperatures, but the estimated enthalpy of micellization, ΔHM0, is considerably lower in comparison with that obtained for ionic surfactants in water and NaCl solutions. The standard Gibbs free energy, ΔGM0, and entropy, ΔSM0, of micellization were estimated by fitting the model equation based on the mass action model to the experimental data. The aggregation numbers of CHAPS surfactant around cmc, obtained by the fitting procedure also, are considerably low (nagg ≈ 5 ± 1). Furthermore, some predictions about the hydration of the micelle interior based on the correlation between heat capacity change, Δcp,M0, and changes in solvent-accessible surface upon micelle formation were made. CHAPS molecules are believed to stay in contact with water upon aggregation, which is somehow similar to the micellization process of short alkyl chain cationic surfactants.
Collapse
Affiliation(s)
- Ana Kroflič
- Faculty of Chemistry and Chemical Technology, Aškerčeva 5, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | | | | |
Collapse
|
27
|
Manohar C, Narayanan J. Average packing factor approach for designing micelles, vesicles and gel phases in mixed surfactant systems. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.03.066] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
28
|
Naskar B, Ghosh S, Nagadome S, Sugihara G, Moulik SP. Behavior of the amphiphile CHAPS alone and in combination with the biopolymer inulin in water and isopropanol-water media. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:9148-9159. [PMID: 21667919 DOI: 10.1021/la201119c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Self-aggregation of the zwitterionic surfactant 3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate (CHAPS) in water and isopropanol-water media, and interaction of the amphiphile with the biopolymer inulin in these media were investigated. The micellar properties of the zwitterionic surfactant and its associated interfacial and bulk properties along with the related energetic, and aggregation number were determined. The different stages of interaction of the CHAPS-inulin combines were identified and assessed. The complexes were formed and aggregated in solution at different stages of their molecular compositions. The aggregated sizes were determined by dynamic light scattering study and the morphology in the solvent removed states were examined using scanning electron microscope and transmission electron microscope techniques. The results witnessed formation of ensembles of varied and striking patterns.
Collapse
Affiliation(s)
- Bappaditya Naskar
- Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | | | | | | | | |
Collapse
|
29
|
Dash U, Misra PK. Organization of amphiphiles. J Colloid Interface Sci 2011; 357:407-18. [DOI: 10.1016/j.jcis.2011.01.087] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 01/22/2011] [Accepted: 01/25/2011] [Indexed: 11/16/2022]
|
30
|
Mangiapia G, D'Errico G, Capuano F, Ortona O, Heenan RK, Paduano L, Sartorio R. On the interpretation of transport properties of sodium cholate and sodium deoxycholate in binary and ternary aqueous mixtures. Phys Chem Chem Phys 2011; 13:15906-17. [DOI: 10.1039/c1cp20922a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
Selvam S, Mishra AK. Multiple prototropism of fisetin in sodium cholate and related bile salt media. Photochem Photobiol Sci 2010; 10:66-75. [PMID: 20976368 DOI: 10.1039/c0pp00120a] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fisetin, a bioflavonoid, has important biological relevance. It exhibits intramolecular excited state proton transfer (ESIPT), analogous to the structurally similar flavonoids. The presence of multiple prototropic forms of fisetin was observed at various concentrations of different bile salt molecules. The presence of ground state fisetin anion (FA)(GS) (λ(ex) 418 nm; λ(em) 490 nm) in alcohols and bile salt micellar media is a novel observation. The interaction of fisetin with sodium cholate (NaC) and some other bile salts has been studied in detail, using the intrinsic fluorescence of different prototropic forms of fisetin: neutral form (FN, λ(ex) 369 nm, λ(em) ~ 400 nm), ground state anion form ((FA)(GS), λ(ex) 418 nm, λ(em) 490 nm) and phototautomer (FT, λ(ex) 369 nm, λ(em) 540 nm). The hypsochromic shift of (FA*)(ES) emission and bathochromic shift of FT emission with increasing bile salt concentration suggests the progressive reduction of polarity of the bile salt media, which could be resulting from the neutralization of bile salt molecules as their concentration increases.
Collapse
Affiliation(s)
- Susithra Selvam
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, Tamilnadu, India
| | | |
Collapse
|
32
|
|
33
|
Misra PK, Panigrahi S, Dash U, Mandal AB. Organization of amphiphiles. Part XI: Physico-chemical aspects of mixed micellization involving normal conventional surfactant and a non-ionic gemini surfactant. J Colloid Interface Sci 2010; 345:392-401. [DOI: 10.1016/j.jcis.2010.01.066] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Revised: 01/19/2010] [Accepted: 01/22/2010] [Indexed: 10/19/2022]
|
34
|
|
35
|
Selvam S, Andrews ME, Mishra AK. A photophysical study on the role of bile salt hydrophobicity in solubilizing amphotericin B aggregates. J Pharm Sci 2010; 98:4153-60. [PMID: 19283765 DOI: 10.1002/jps.21718] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Amphotericin B (AmB) is a highly effective antifungal agent and finds utility against a broad spectrum of fungal species. Bile salts are biocompatible biosurfactants, widely used as drug delivery media for many hydrophobic drugs. AmB in the colloidal suspension of sodium deoxycholate (NaDC) is a well-known commercial formulation of AmB. In the present work, the association of AmB with three bile salts, namely sodium cholate, sodium taurodeoxycholate and sodium taurocholate is studied using the photophysical properties of AmB. Selective excitation of monomeric AmB (lambda(ex) 414 nm, lambda(em) 560 nm) and dimeric AmB (lambda(ex) 335 nm, lambda(em) 472 nm) reveal that with increasing concentration of bile salts, the higher aggregates in water disaggregate to form both monomeric and dimeric forms of AmB. This is seen to be a general trend in all the bile salts studied. Results of steady state fluorescence anisotropy and fluorescence lifetimes studies suggest that the interaction between AmB (hydrophobic heptaene face) and bile salts (hydrophobic steroidal face) is essentially hydrophobic.
Collapse
Affiliation(s)
- Susithra Selvam
- Department of Chemistry, Indian Institute of Technology Madras, Chennai - 600 036, Tamilnadu, India
| | | | | |
Collapse
|
36
|
Moulik SP, Mitra D. Amphiphile self-aggregation: An attempt to reconcile the agreement–disagreement between the enthalpies of micellization determined by the van’t Hoff and Calorimetry methods. J Colloid Interface Sci 2009; 337:569-78. [DOI: 10.1016/j.jcis.2009.05.064] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 05/24/2009] [Accepted: 05/27/2009] [Indexed: 10/20/2022]
|
37
|
Singh RB, Mahanta S, Guchhait N. Study of proteinous and micellar microenvironment using donor acceptor charge transfer fluorosensor N,N-dimethylaminonaphthyl-(acrylo)-nitrile. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 72:1103-1111. [PMID: 19230749 DOI: 10.1016/j.saa.2009.01.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Accepted: 01/08/2009] [Indexed: 05/27/2023]
Abstract
Interaction of charge transfer fluorophore N,N-dimethylaminonaphthyl-(acrylo)-nitrile (DMANAN) with globular proteins Human Serum Albumin (HSA) and Bovine Serum Albumin (BSA) brings forth a marked change in the position and intensity of band maxima both in case of absorption and fluorescence spectra. Spectroscopic approach has been elaborately implemented to explore the binding phenomena of the probe with HSA and BSA and it is found that the extent of binding of the probe to both serum albumins is similar in nature. Steady state fluorescence anisotropy values, fluorescence quenching study using acrylamide quencher and Red Edge Excitation Shift (REES) help in drawing reliable conclusions regarding the location of the probe molecule within the hydrophobic cavity of the proteins. An increase in fluorescence lifetime of the probe molecule solubilized in both the proteinous media also indicate that the probe is located at the motionally restricted environment inside the hydrophobic cavity of proteins and hence non-radiative channels are less operative than in the bulk water. Similarly, the variation of position and intensity of the emission maxima of DMANAN solubilized in micellar medium of Sodium Dodecyl Sulphate (SDS) also predicts well the critical micellar concentration (CMC) and polarity of micellar microenvironment.
Collapse
Affiliation(s)
- Rupashree Balia Singh
- University of Calcutta, Department of Chemistry, 92 A.P.C. Road, Kolkata 700009, India
| | | | | |
Collapse
|
38
|
Katre YR, Patil S, Singh AK. Effect of Cationic Micelle on the Kinetics of Oxidation of Citric Acid by N-Bromophthalimide in Acidic Medium. J DISPER SCI TECHNOL 2009. [DOI: 10.1080/01932690802498070] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
39
|
Disaggregation of amphotericin B by sodium deoxycholate micellar aggregates. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2008; 93:66-70. [DOI: 10.1016/j.jphotobiol.2008.06.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2008] [Revised: 06/23/2008] [Accepted: 06/26/2008] [Indexed: 11/23/2022]
|
40
|
Pártay LB, Sega M, Jedlovszky P. Counterion binding in the aqueous solutions of bile acid salts, as studied by computer simulation methods. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:10729-10736. [PMID: 18767819 DOI: 10.1021/la801352d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We investigate the structural and dynamical properties of counterion binding in sodium cholate and sodium deoxycholate micelles at three different concentration, namely, 30, 90, and 300 mM, by means of molecular dynamics simulations at the atomistic level. The obtained results can resolve a long-standing, apparent contradiction between different experiments that reported discordant values for the degree of counterion binding. Namely, our results suggest that certain experimental techniques, such as freezing point depression, are only sensitive to the contact counterions, and hence, the degree of contact binding of the counterions is measured. On the other hand, in experiments employing, e.g., electrode potential or nuclear magnetic resonance measurements, the solvent-separated counterions also contribute to the signal detected, and hence, the counterions that are measured as bound ones do include the solvent-separated counterions as well.
Collapse
Affiliation(s)
- Lívia B Pártay
- Laboratory of Interfaces and Nanosize Systems, Institute of Chemistry, Eötvös Loránd University, Budapest, Hungary.
| | | | | |
Collapse
|
41
|
|
42
|
Puppato A, DuPré DB, Stolowich N, Yappert MC. Effect of temperature and pH on 31P nuclear magnetic resonances of phospholipids in cholate micelles. Chem Phys Lipids 2007; 150:176-85. [PMID: 17723229 DOI: 10.1016/j.chemphyslip.2007.07.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2007] [Revised: 06/30/2007] [Accepted: 07/13/2007] [Indexed: 10/23/2022]
Abstract
Accurate and precise determination of phospholipid composition by 31P NMR spectroscopy requires correct assignments and adequate spectral resolution. Because temperature and pH may affect chemical shifts (delta), our first aim was to establish the temperature coefficient (Deltadelta/DeltaT) of common phospholipid classes when using sodium cholate as detergent. This parameter can then be used to aid in resonance assignments. The second goal was to investigate the pH dependence of delta so that, in addition to temperature, pH control can be used to minimize spectral overlap. For phosphatidylcholine, sphingomyelin, dihydrosphingomyelin and phosphatidylglycerol, delta values were invariant with pH and temperature. Whereas the Deltadelta/DeltaT for phosphatidylinositol was 4 x 10(-3)ppm/ degrees C, regardless of pH, these coefficients were highly pH-dependent for phosphatidic acid, phosphatidylethanolamine and phosphatidylserine, exhibiting maximal variations with the deprotonation of the headgroup, particularly for phosphatidic acid. These trends indicate the importance of H-bonding on delta and Deltadelta/DeltaT for phospholipid resonances.
Collapse
Affiliation(s)
- Andrés Puppato
- Department of Chemistry, University of Louisville, Louisville, KY 40292, United States
| | | | | | | |
Collapse
|
43
|
Subuddhi U, Mishra AK. Micellization of bile salts in aqueous medium: A fluorescence study. Colloids Surf B Biointerfaces 2007; 57:102-7. [PMID: 17336505 DOI: 10.1016/j.colsurfb.2007.01.009] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2007] [Revised: 01/23/2007] [Accepted: 01/23/2007] [Indexed: 11/20/2022]
Abstract
Owing to the physiological importance of the micellization process of bile salts, the critical micelle concentration (CMC) becomes a fundamental parameter in the evaluation of their biological activities. The present study suggests fluorescence probing, using 1,6-diphenylhexatriene (DPH), as a simple, convenient, sensitive and economic method for monitoring the micellization process of bile salts in aqueous medium. Three independent parameters: fluorescence intensity, anisotropy and lifetime of DPH have been employed successfully for determining the CMC of two bile salts, sodium deoxycholate (NaDC) and sodium cholate (NaC), in aqueous medium. The CMC values reported by all the above three parameters of DPH are found to be same and it is 16 mM for NaC and 6 mM for NaDC at 25 degrees C in unbuffered solution. The effect of temperature and ionic strength on the micellization process has also been investigated employing DPH as a fluorescent probe. Increasing temperature leads to the formation of fluffier micelles with less rigid interior for both NaC and NaDC. The micelle core of NaC is less perturbed by the presence of NaCl whereas in case of NaDC, the aggregates provide DPH a more nonpolar and rigid environment in presence of NaCl than that in absence of salt.
Collapse
Affiliation(s)
- Usharani Subuddhi
- Department of Chemistry, Indian Institute of Technology--Madras, Chennai 36, India
| | | |
Collapse
|
44
|
Hiruta Y, Hattori Y, Kawano K, Obata Y, Maitani Y. Novel ultra-deformable vesicles entrapped with bleomycin and enhanced to penetrate rat skin. J Control Release 2006; 113:146-54. [PMID: 16793162 DOI: 10.1016/j.jconrel.2006.04.016] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2006] [Revised: 04/14/2006] [Accepted: 04/30/2006] [Indexed: 10/24/2022]
Abstract
Beta-sitosterol 3-beta-D-glucoside (Sit-G), an absorption enhancer, was incorporated into ultra-deformable vesicles containing bleomycin to attenuate drug toxicity in human keratinocytes. The presence of Sit-G increased drug entrapment and improved in vitro stability of ultra-deformable vesicles. Confocal laser scanning microscopy revealed the extent to which Sit-G facilitated the penetration of ultra-deformable vesicles containing fluorescent probes into rat skin upon non-occlusive topical application. Furthermore, treatment with preparations incorporating Sit-G resulted in elevated epidermal and dermal concentrations of bleomycin. Ultra-deformable formulation contained Sit-G maintained flexibility for penetration through the skin, increased entrapment efficiency of bleomycin and stability in vitro, and significantly increased distribution of bleomycin in epidermis and dermis compared with those without Sit-G.
Collapse
Affiliation(s)
- Yuka Hiruta
- Institute of Medicinal Chemistry, Hoshi University, Ebara 2-4-41, Shinagawa-ku, Tokyo 142-8501, Japan
| | | | | | | | | |
Collapse
|