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Annunziata O. The Salt-Induced Diffusiophoresis of Nonionic Micelles-Does the Salt-Induced Growth of Micelles Influence Diffusiophoresis? Molecules 2024; 29:3618. [PMID: 39125023 PMCID: PMC11314613 DOI: 10.3390/molecules29153618] [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: 06/15/2024] [Revised: 07/23/2024] [Accepted: 07/30/2024] [Indexed: 08/12/2024] Open
Abstract
Salt-induced diffusiophoresis is the migration of a colloidal particle in water due to a directional salt concentration gradient. An important example of colloidal particles is represented by micelles, generated by surfactant self-assembly in water. For non-ionic surfactants containing polyethylene glycol (PEG) groups, PEG preferential hydration at the micelle-water interface is expected to drive micelle diffusiophoresis from high to low salt concentration. However, micelles are reversible supramolecular assemblies, with salts being able to promote a significant change in micelle size. This phenomenon complicates the description of diffusiophoresis. Specifically, it is not clear to what extent the salt-induced growth of micelles affects micelle diffusiophoresis. In this paper, a multiple-equilibrium model is developed for assessing the contribution of the micelle growth and preferential hydration mechanisms to the diffusiophoresis of non-ionic micelles. The available experimental data characterizing the effect of NaCl on Triton X-100 aggregation number are combined with data on diffusiophoresis and the preferential hydration of PEG chains to show that the contribution of the micelle growth mechanism to overall diffusiophoresis is small compared to that of preferential hydration.
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Affiliation(s)
- Onofrio Annunziata
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, TX 76109, USA
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2
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Silva E Carvalho I, Pratavieira S, Salvador Bagnato V, Alves F. Sonophotodynamic inactivation of Pseudomonas aeruginosa biofilm mediated by curcumin. BIOFOULING 2023; 39:606-616. [PMID: 37537876 DOI: 10.1080/08927014.2023.2241385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 07/20/2023] [Accepted: 07/23/2023] [Indexed: 08/05/2023]
Abstract
The inactivation of Pseudomonas aeruginosa biofilm is a major challenge, as biofilms are less responsive to conventional treatments and responsible for persistent infections. This has led to the investigation of alternative approaches for biofilm control such as photodynamic (PDI) and sonodynamic (SDI) inactivation. The combination of them, known as Sonophotodynamic Inactivation (SPDI), has improved the effectiveness of the process. Curcumin, a well-established photosensitizer, has been identified as a potential sonosensitizer. This study evaluated the most effective combination for SPDI against P. aeruginosa biofilms in vitro, varying curcumin concentrations and ultrasound intensities. The results indicated that the inactivation was directly proportional to the curcumin concentration. Using curcumin 120 µM and 3.0 W.cm-2 of ultrasound intensity, SPDI demonstrated the highest and the best synergistic results, equivalent to 6.9 ± 2.1 logs of reduction. PDI reduced 0.7 ± 0.9 log and SDI had no effect. In conclusion, SPDI with curcumin is a promising approach for biofilm inactivation.
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Affiliation(s)
| | | | - Vanderlei Salvador Bagnato
- São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil
- Department of Biomedical Engineering, College of Engineering, TX A&M University, College Station, TX, USA
| | - Fernanda Alves
- São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil
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3
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Diffusiophoresis of a Nonionic Micelle in Salt Gradients; Roles of Preferential Hydration and Salt-Induced Surfactant Aggregation. Int J Mol Sci 2022; 23:ijms232213710. [PMID: 36430191 PMCID: PMC9696892 DOI: 10.3390/ijms232213710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/01/2022] [Accepted: 11/02/2022] [Indexed: 11/11/2022] Open
Abstract
Diffusiophoresis is the migration of a colloidal particle in water driven by concentration gradients of cosolutes such as salts. We have experimentally characterized the diffusiophoresis of tyloxapol micelles in the presence of MgSO4, a strong salting-out agent. Specifically, we determined the multicomponent-diffusion coefficients using Rayleigh interferometry, cloud points, and dynamic-light-scattering diffusion coefficients on the ternary tyloxapol-MgSO4-water system at 25 °C. Our experimental results show that micelle diffusiophoresis occurs from a high to a low salt concentration (positive diffusiophoresis). Moreover, our data were used to characterize the effect of salt concentration on micelle size and salt osmotic diffusion, which occurs from a high to a low surfactant concentration. Although micelle diffusiophoresis can be attributed to the preferential hydration of the polyethylene glycol surface groups, salting-out salts also promote an increase in the size of micellar aggregates, ultimately leading to phase separation at high salt concentration. This complicates diffusiophoresis description, as it is not clear how salt-induced surfactant aggregation contributes to micelle diffusiophoresis. We, therefore, developed a two-state aggregation model that successfully describes the observed effect of salt concentration on the size of tyloxapol micelles, in the case of MgSO4 and the previously reported case of Na2SO4. Our model was then used to theoretically evaluate the contribution of salt-induced aggregation to diffusiophoresis. Our analysis indicates that salt-induced aggregation promotes micelle diffusiophoresis from a low to a high salt concentration (negative diffusiophoresis). However, we also determined that this mechanism marginally contributes to overall diffusiophoresis, implying that preferential hydration is the main mechanism causing micelle diffusiophoresis. Our results suggest that sulfate salts may be exploited to induce the diffusiophoresis of PEG-functionalized particles such as micelles, with potential applications to microfluidics, enhanced oil recovery, and controlled-release technologies.
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Salt-induced diffusiophoresis of a nonionic micelle: Roles of salting out and proximity to surfactant cloud point. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Cruz Barrios E, Annunziata O. Determination of Critical Micelle Concentration from the Diffusion-Driven Dilution of Micellar Aqueous Mixtures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:2855-2862. [PMID: 33596077 DOI: 10.1021/acs.langmuir.1c00176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Micellization is a phenomenon of central importance in surfactant solutions. Here, we demonstrate that the diffusion-based spreading of the free boundary between a micellar aqueous solution and pure water yields a one-dimensional spatial profile of surfactant concentration that can be used to identify the critical micelle concentration, here denoted as C*. This can be achieved because dilution of micelles into water leads to their dissociation at a well-defined position along the concentration profile and an abrupt increase in the diffusion coefficient. Rayleigh interferometry was successfully employed to determine C* values for three well-known surfactants in water at 25 °C: Triton X-100 (TX-100), sodium dodecyl sulfate (SDS), and poly(oxyethylene)(4)Lauryl Ether (Brij-30). The dependence of C* on salt concentration was also characterized for TX-100 in the presence of Na2SO4, NaCl, and NaSCN. Accurate values of C* can be directly identified by visual inspection of the corresponding concentration-gradient profiles. To apply the method of least squares to experimental concentration profiles, a mathematical expression was derived from Fick's law and the pseudophase separation model of micellization with the inclusion of appropriate modifications. While Rayleigh interferometry was employed in our experiments, this approach can be extended to any experimental technique that yields one-dimensional profiles of surfactant concentration. Moreover, diffusion-driven surfactant disaggregation is precise, noninvasive, requires single-sample preparation, and applies to both nonionic and ionic surfactants. Thus, this work provides the foundation of diffusion-driven dilution methods, thereby representing a valuable addition to existing techniques for the determination of C*.
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Affiliation(s)
- Eliandreina Cruz Barrios
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie St., Sid Richardson Bldg. #438, Fort Worth, Texas 76129, United States
| | - Onofrio Annunziata
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie St., Sid Richardson Bldg. #438, Fort Worth, Texas 76129, United States
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Nachari Y, Jabbari M. A case study on the partitioning of pharmaceutical compound naproxen in edible oil-water system in the presence of ionic and non-ionic surfactants. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.02.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Alexander NP, Phillips RJ, Dungan SR. Multicomponent diffusion of interacting, nonionic micelles with hydrophobic solutes. SOFT MATTER 2021; 17:531-542. [PMID: 33174585 DOI: 10.1039/d0sm01406k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ternary diffusion coefficient matrices [D] were measured using the Taylor dispersion method, for crowded aqueous solutions of decaethylene glycol monododecyl ether (C12E10) with either decane or limonene solute. The matrix [D], for both systems, was found to be highly non-diagonal, and concentration dependent, over a broad domain of solute to surfactant molar ratios and micelle volume fractions. A recently developed theoretical model, based on Batchelor's theory for gradient diffusion in dilute, polydisperse mixtures of interacting spheres, was simplified by neglecting local polydispersity, and effectively used to predict [D] with no adjustable parameters. Even though the model originates from dilute theory, the theoretical results were in surprisingly good agreement with experimental data for concentrated mixtures, with volume fractions up to φ≈ 0.47. In addition, the theory predicts eigenvalues D- and D+ that correspond to long-time self and gradient diffusion coefficients, respectively, for monodisperse spheres, in reasonable agreement with experimental data.
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Affiliation(s)
- Nathan P Alexander
- Department of Chemical Engineering, University of California at Davis, Davis, CA 95616, USA.
| | - Ronald J Phillips
- Department of Chemical Engineering, University of California at Davis, Davis, CA 95616, USA.
| | - Stephanie R Dungan
- Department of Chemical Engineering, University of California at Davis, Davis, CA 95616, USA. and Department of Food Science and Technology, University of California at Davis, Davis, CA 95616, USA
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Alexander NP, Phillips RJ, Dungan SR. Multicomponent Diffusion in Aqueous Solutions of Nonionic Micelles and Decane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:13595-13606. [PMID: 31553616 DOI: 10.1021/acs.langmuir.9b01823] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Taylor dispersion and dynamic light scattering techniques were used to measure the ternary diffusivity matrix [D] and the micelle gradient diffusion coefficient, respectively, in crowded aqueous solutions of decaethylene glycol monododecyl ether (C12E10) and decane. The results indicate that C12E10 diffused down its own gradient with the micelle gradient diffusivity while decane diffused down a decane gradient at a much slower rate. Furthermore, strong diffusion coupling, comprising decane diffusion down a surfactant gradient and surfactant diffusion up a decane gradient, was also observed with cross diffusivities that were on the order of or larger than the main diffusivities. Measurements of the micelle aggregation number, hydration index, and the hydrodynamic radius, obtained using both static and dynamic light scattering methods, indicate that decane-containing micelles interacted as hard spheres and had radii and aggregation numbers that increased linearly with the molar ratio of solute to surfactant. A theoretical model, developed using Batchelor's theory for gradient diffusion in a polydisperse system of interacting hard spheres, was effectively used to predict [D] with no adjustable parameters. A comparison with the theory indicates that decane diffused down its own gradient by micelle self-diffusion while surfactant diffused down a surfactant gradient by micelle gradient diffusion. It is also shown that intermicellar interactions drove decane diffusion down a C12E10 gradient by a volume exclusion effect while an increase in the micelle aggregation number and hydrodynamic radius with decane was necessary to drive surfactant diffusion up a decane gradient.
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Investigation of the interaction of levofloxacin hemihydrate with surfactants in the occurrence of salts: Conductivity and cloud point measurement. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.148] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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10
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Ribeiro ACF, Esteso MA. Transport Properties for Pharmaceutical Controlled-Release Systems: A Brief Review of the Importance of Their Study in Biological Systems. Biomolecules 2018; 8:biom8040178. [PMID: 30563024 PMCID: PMC6315691 DOI: 10.3390/biom8040178] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 12/07/2018] [Accepted: 12/10/2018] [Indexed: 12/15/2022] Open
Abstract
The goal of this work was to comprehensive study the transport properties of controlled-release systems for the safe and reliable delivery of drugs. Special emphasis has been placed on the measurement of the diffusion of drugs, alone or in combination with carrier molecules for enhanced solubility and facilitated transport. These studies have provided detailed comprehensive information—both kinetic and thermodynamic—for the design and operation of systems for the controlled release and delivery of drugs. Cyclodextrins are among the most important carriers used in these systems. The basis for their popularity is the ability of these materials to solubilize poorly soluble drugs, generally resulting in striking increases in their water solubilities. The techniques used in these investigations include pulse voltammetry, nuclear magnetic resonance (NMR) and Raman spectroscopy, ultrasonic relaxation, and dissolution kinetics. Transport in these systems is a mutual diffusion process involving coupled fluxes of drugs and carrier molecules driven by concentration gradients. Owing to a strong association in these multicomponent systems, it is not uncommon for a diffusing solute to drive substantial coupled fluxes of other solutes, mixed electrolytes, or polymers. Thus, diffusion data, including cross-diffusion coefficients for coupled transport, are essential in order to understand the rates of many processes involving mass transport driven by chemical concentration gradients, as crystal growth and dissolution, solubilization, membrane transport, and diffusion-limited chemical reactions are all relevant to the design of controlled-release systems. While numerous studies have been carried out on these systems, few have considered the transport behavior for controlled-release systems. To remedy this situation, we decided to measure mutual diffusion coefficients for coupled diffusion in a variety of drug–carrier solutions. In summary, the main objective of the present work was to understand the physical chemistry of carrier-mediated transport phenomena in systems of controlled drug release.
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Affiliation(s)
- Ana C F Ribeiro
- Department of Chemistry, Coimbra Chemistry Centre, University of Coimbra, 3004-535 Coimbra, Portugal.
| | - Miguel A Esteso
- U.D. Química Física, Universidad de Alcalá, Alcalá de Henares, 28871 Madrid, Spain.
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Nimdeo YM, Joshi YM, Muralidhar K. Diffusion of charged nano-disks in aqueous media: Influence of competing inter-particle interactions and thermal effects. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.01.069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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McAfee MS, Zhang H, Annunziata O. Amplification of salt-induced polymer diffusiophoresis by increasing salting-out strength. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:12210-12219. [PMID: 25245596 DOI: 10.1021/la503214b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The role of salting-out strength on (1) polymer diffusiophoresis from high to low salt concentration, and (2) salt osmotic diffusion from high to low polymer concentration was investigated. These two cross-diffusion phenomena were experimentally characterized by Rayleigh interferometry at 25 °C. Specifically, we report ternary diffusion coefficients for polyethylene glycol (molecular weight, 20 kg·mol(-1)) in aqueous solutions of several salts (NaCl, KCl, NH4Cl, CaCl2, and Na2SO4) as a function of salt concentration at low polymer concentration (0.5% w/w). We also measured polymer diffusion coefficients by dynamic light scattering in order to discuss the interpretation of these transport coefficients in the presence of cross-diffusion effects. Our cross-diffusion results, primarily those on salt osmotic diffusion, were utilized to extract N(w), the number of water molecules in thermodynamic excess around a macromolecule. This preferential-hydration parameter characterizes the salting-out strength of the employed salt. For chloride salts, changing cation has a small effect on N(w). However, replacing NaCl with Na2SO4 (i.e., changing anion) leads to a 3-fold increase in N(w), in agreement with cation and anion Hofmeister series. Theoretical arguments show that polymer diffusiophoresis is directly proportional to the difference N(w) - n(w), where n(w) is the number of water molecules transported by the migrating macromolecule. Interestingly, the experimental ratio, n(w)/N(w), was found to be approximately the same for all investigated salts. Thus, the magnitude of polymer diffusiophoresis is also proportional to salting-out strength as described by N(w). A basic hydrodynamic model was examined in order to gain physical insight on the role of n(w) in particle diffusiophoresis and explain the observed invariance of n(w)/N(w). Finally, we consider a steady-state diffusion problem to show that concentration gradients of strong salting-out agents such as Na2SO4 can produce large amplifications and depletions of macromolecule concentration. These effects may be exploited in self-assembly and adsorption processes.
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Affiliation(s)
- Michele S McAfee
- Contribution from the Department of Chemistry, Texas Christian University , Fort Worth, Texas 76129, United States
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Musnicki WJ, Dungan SR, Phillips RJ. Multicomponent diffusion in solute-containing micelle and microemulsion solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11019-11030. [PMID: 25137032 DOI: 10.1021/la501643v] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Holographic interferometry was used to obtain new results for the four coefficients that determine rates of multicomponent diffusion of hydrophobic solutes and surfactants in microemulsions. The three solutes pentanol, octanol, and heptane were examined in microemulsions formed from decaethylene glycol monododecyl ether (C12E10) and sodium dodecyl sulfate (SDS). These coefficients are compared with relevant binary and effective binary diffusion coefficients, and also with ternary diffusion coefficients reported in the literature. It is shown that a strong coupling exists between the diffusion of hydrophobic solutes and surfactant in solute-containing microemulsions. In particular, the presence of a gradient in the concentration of the solute can induce a surprisingly large flux of surfactant either up or down the solute gradient. Within the framework of irreversible thermodynamics, these results indicate that hydrophobic solute molecules significantly alter the chemical potential of the surfactant in microemulsions. These effects are present to a comparable degree for both the nonionic C12E10 and ionic SDS microemulsions.
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Affiliation(s)
- Wyatt J Musnicki
- Department of Chemical Engineering and Materials Science and ‡Department of Food Science and Technology, University of California , Davis, California 95616, United States
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Banerjee C, Ghosh S, Mandal S, Kuchlyan J, Kundu N, Sarkar N. Exploring the photophysics of curcumin in zwitterionic micellar system: an approach to control ESIPT process in the presence of room temperature ionic liquids (RTILs) and anionic surfactant. J Phys Chem B 2014; 118:3669-81. [PMID: 24617495 DOI: 10.1021/jp411778q] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this manuscript, we have modulated the photophysical properties of curcumin in a zwitterionic (N-hexadecyl-N,N-dimethylammonio-1-propanesulfonate (SB-16)) micellar aggregates with addition of room temperature ionic liquids (RTILs) as well as commonly used anionic surfactant (SDS), using steady-state and time-resolved spectroscopic techniques. To modulate the photophysics, first we studied its interaction with an SB-16 micellar system, then to further exploit its photophysics, three RTILs (EmimES, EmimBS, EmimHS) with variation of alkyl chain lengths as well as SDS were used. It is observed that the rate of degradation of curcumin is drastically decreased after partitioning into the zwitterionic micellar system. It is shown that the dynamics of excited state intramolecular proton transfer (ESIPT) processes can be controlled by using those RTILs and SDS. Our study also reveals that the hindrance of nonradiative processes of curcumin, i.e., ESIPT is more pronounced in the case of RTIL containing a long alkyl chain compared to a small one. However, most interestingly the addition of long chain (dodecyl) anionic surfactant (SDS) promotes the ESIPT process of curcumin. We have also studied the effect of the addition of inorganic salt and compared the results with RTILs. The present work demonstrates an effort to decipher the photophysics of curcumin in zwitterionic micellar systems by monitoring its excited state dynamics.
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Affiliation(s)
- Chiranjib Banerjee
- Department of Chemistry, Indian Institute of Technology , Kharagpur 721302, West Bengal, India
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Bhardwaj V, Bhardwaj T, Sharma K, Gupta A, Chauhan S, Cameotra SS, Sharma S, Gupta R, Sharma P. Drug–surfactant interaction: thermo-acoustic investigation of sodium dodecyl sulfate and antimicrobial drug (levofloxacin) for potential pharmaceutical application. RSC Adv 2014. [DOI: 10.1039/c4ra02177k] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In the present study, the impact of the potential antimicrobial drug (levofloxacin) on the micellar system of anionic surfactant (SDS) has been studied.
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Affiliation(s)
- Varun Bhardwaj
- Department of Biotechnology
- Bioinformatics & Pharmacy
- Jaypee University of Information Technology
- Solan, India
| | - Tarun Bhardwaj
- Department of Biotechnology
- Bioinformatics & Pharmacy
- Jaypee University of Information Technology
- Solan, India
| | - Kundan Sharma
- Department of Chemistry
- Himachal Pradesh University
- Shimla, India
| | - Abhishek Gupta
- Department of Biotechnology
- Bioinformatics & Pharmacy
- Jaypee University of Information Technology
- Solan, India
| | - S. Chauhan
- Department of Chemistry
- Himachal Pradesh University
- Shimla, India
| | | | | | | | - Poonam Sharma
- Department of Biotechnology
- Bioinformatics & Pharmacy
- Jaypee University of Information Technology
- Solan, India
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Tributyltin(IV)[3-(3′,5′-dimethylphenylamido)propanoate] as a potent HCV inhibitor, its delivery study, controlled release and binding sites using CTAB as a standard cell membrane. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.3079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Effect of the spacer length on the electrostatic interactions of cationic gemini surfactant micelles with trianionic curcumin. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.06.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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18
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Hingorani T, Adelli GR, Punyamurthula N, Gul W, ElSohly MA, Repka MA, Majumdar S. Ocular disposition of the hemiglutarate ester prodrug of ∆⁹-Tetrahydrocannabinol from various ophthalmic formulations. Pharm Res 2013; 30:2146-56. [PMID: 23737345 PMCID: PMC3851110 DOI: 10.1007/s11095-013-1072-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2013] [Accepted: 05/03/2013] [Indexed: 12/26/2022]
Abstract
PURPOSE The overall goal of this project is to enhance ocular delivery of ∆(9)-Tetrahydrocannabinol (THC) through the topical route. METHODS Solubility, stability and in vitro transcorneal permeability of the relatively hydrophilic hemiglutarate ester derivative, THC-HG, was studied in the presence of surfactants. The solutions were characterized with respect to micelle size, zeta potential and solution viscosity. In vivo studies were carried out in New Zealand albino rabbits. A previously reported promising THC-HG ion-pair formulation was also studied in vivo. RESULTS Aqueous solubility and stability and in vitro transcorneal permeability of THC-HG was enhanced significantly in the presence of surfactants. THC levels in the ocular tissues (except cornea) were found to be below detection limits from mineral oil, surfactant or emulsion based formulations containing THC. In contrast, micellar and ion pair based THC-HG formulations produced significantly higher total THC concentrations in the anterior ocular chamber. CONCLUSION In this study, although delivery of THC to the anterior chamber ocular tissues could be significantly increased through the prodrug and formulation approaches tested, further studies are needed to increase penetration to the back-of-the eye.
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Affiliation(s)
- Tushar Hingorani
- Department of Pharmaceutics, School of Pharmacy, The University of Mississippi, University, Mississippi 38677
| | - Goutham R. Adelli
- Department of Pharmaceutics, School of Pharmacy, The University of Mississippi, University, Mississippi 38677
| | - Nagendra Punyamurthula
- Department of Pharmaceutics, School of Pharmacy, The University of Mississippi, University, Mississippi 38677
| | - Waseem Gul
- Research Institute of Pharmaceutical Sciences, The University of Mississippi, University, Mississippi 38677
- National Center for Natural Product Research, The University of Mississippi, University, Mississippi 38677
- ElSohly Laboratories Inc., 5-Industrial Park Drive, Oxford, Mississippi 38655
| | - Mahmoud A. ElSohly
- Research Institute of Pharmaceutical Sciences, The University of Mississippi, University, Mississippi 38677
- National Center for Natural Product Research, The University of Mississippi, University, Mississippi 38677
- ElSohly Laboratories Inc., 5-Industrial Park Drive, Oxford, Mississippi 38655
| | - Michael A. Repka
- Department of Pharmaceutics, School of Pharmacy, The University of Mississippi, University, Mississippi 38677
- Research Institute of Pharmaceutical Sciences, The University of Mississippi, University, Mississippi 38677
- National Center for Natural Product Research, The University of Mississippi, University, Mississippi 38677
| | - Soumyajit Majumdar
- Department of Pharmaceutics, School of Pharmacy, The University of Mississippi, University, Mississippi 38677
- Research Institute of Pharmaceutical Sciences, The University of Mississippi, University, Mississippi 38677
- National Center for Natural Product Research, The University of Mississippi, University, Mississippi 38677
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Effect of HP-β-cyclodextrin in the diffusion behaviour of hydrocortisone in aqueous solutions at T=298.15 K. Int J Pharm 2013; 441:352-5. [PMID: 23228897 DOI: 10.1016/j.ijpharm.2012.11.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Revised: 11/09/2012] [Accepted: 11/14/2012] [Indexed: 11/24/2022]
Abstract
Binary (D) and ternary (D(11), D(22), D(12) and D(21)) mutual diffusion coefficients determined by the Taylor dispersion method are reported for two aqueous systems, pure hydrocortisone (HC/H(2)O) and HC plus HP-β-cyclodextrin (HC/HP-βCD/H(2)O), at T=298.15 K. From these data, some thermodynamic information as well as conclusions about the influence of that carbohydrate in the diffusion of this drug are given.
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Comparative study on the interactions of cationic gemini and single-chain surfactant micelles with curcumin. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.08.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Ke D, Wang X, Yang Q, Niu Y, Chai S, Chen Z, An X, Shen W. Spectrometric study on the interaction of dodecyltrimethylammonium bromide with curcumin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14112-14117. [PMID: 22004075 DOI: 10.1021/la203592j] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The interaction between dodecyltrimethylammonium bromide (DTAB) and curcumin has been studied in pH 5.0 sodium phosphate buffer using absorption and fluorescence measurements. With increasing DTAB concentration (C(DTAB)) from 0 to 20 mM, the absorption peak of curcumin at 430 nm, corresponding to the conjugated structure of curcumin, first weakens gradually into a shoulder but increases back into one peak with much higher absorption intensity. On the contrary, as C(DTAB) increases, the initial small absorption shoulder of curcumin at 355 nm, corresponding to the feruloyl unit of curcumin, first increases gradually into a clear peak but decreases back into one shoulder until almost disappeared finally. By remaining at nearly the same wavelength, the fluorescence of curcumin first decreases at C(DTAB) lower than 5 mM and then increases gradually up to C(DTAB) = 10 mM, which is followed by sharp increases of fluorescence intensity with marked blue-shifts at higher C(DTAB). The values of anisotropy and microviscosity of curcumin obtained from the fluorescence polarization technique also showed pronounced changes at different surfactant concentrations. The interaction mechanisms of DTAB with curcumin have been presented at low, intermediate, and high surfactant concentrations, which is relating to interaction forces, surfactant aggregations, as well as structural alterations of curcumin.
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Affiliation(s)
- Dan Ke
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
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Zhang H, Annunziata O. Diffusion of an ionic drug in micellar aqueous solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:3425-3434. [PMID: 19708140 DOI: 10.1021/la803664g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Supramolecular carriers such as micelles can be used to noncovalently bind drug molecules for pharmaceutical applications. However, these carriers can fundamentally affect diffusion-based drug transport due to host-guest coupled diffusion. We report a ternary interdiffusion study on an ionic drug in aqueous micellar solutions. Specifically, high-precision Rayleigh interferometry was used to determine the four multicomponent diffusion coefficients for the potassium naproxenate-tyloxapol-water ternary system at 25 degrees C and pH 7. In addition, we have measured drug solubility as a function of tyloxapol concentration. These measurements were used to characterize drug-surfactant thermodynamic interactions using the two-phase partitioning model. Furthermore, we propose a novel model on host-guest coupled diffusion that includes counterions. We show that quantitative agreement between model and experimental diffusion results can be achieved if the effect of micelle solvation on transport parameters is included in the model. This work represents an essential addition to our previous diffusion study on a nonionic drug and provides guidance for the development of accurate models of drug diffusion-based controlled release in the presence of nanocarriers.
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Affiliation(s)
- Huixiang Zhang
- Department of Chemistry, Texas Christian University, Fort Worth, Texas 76129, USA
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