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Carro N, Mejía A. Prediction of Micellar Thermodynamics of Nonionic Surfactants Based on the Square Gradient Theory. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:14527-14539. [PMID: 36394511 DOI: 10.1021/acs.langmuir.2c00830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
A geometry-dependent contribution based on the square gradient theory of van der Waals is proposed as a predictive modification of the interfacial energy contribution for the micellar thermodynamic theory. The model has an analytic prediction for the spherical and cylindrical geometries. For ellipsoidal geometry, a simple yet physically meaningful approximation is proposed. The critical micelle concentration (CMC) and the surface tension isotherm under the new contribution are compared with the classical theory. The modified model describes qualitatively the available experimental data and the surface isotherm, showing an improvement in the predictions of the CMC.
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Affiliation(s)
- Nicolás Carro
- Departamento de Ingeniería Química, Universidad de Concepción, Concepción4030000, Chile
| | - Andrés Mejía
- Departamento de Ingeniería Química, Universidad de Concepción, Concepción4030000, Chile
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2
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Beheshti E, Riahi S, Riazi M. Impacts of oil components on the stability of aqueous bulk CO2 foams: An experimental study. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Guruge AG, Warren DB, Benameur H, Ford L, Williams HD, Jannin V, Pouton CW, Chalmers DK. Computational and Experimental Models of Type III Lipid-Based Formulations of Loratadine Containing Complex Nonionic Surfactants. Mol Pharm 2021; 18:4354-4370. [PMID: 34807627 DOI: 10.1021/acs.molpharmaceut.1c00547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Type III lipid-based formulations (LBFs) combine poorly water-soluble drugs with oils, surfactants, and cosolvents to deliver the drugs into the systemic circulation. However, the solubility of the drug can be influenced by the colloidal phases formed in the gastrointestinal tract as the formulation is dispersed and makes contact with bile and other materials present within the GI tract. Thus, an understanding of the phase behavior of LBFs in the gut is critical for designing efficient LBFs. Molecular dynamics (MD) simulation is a powerful tool for the study of colloidal systems. In this study, we modeled the internal structures of five type III LBFs of loratadine containing poly(ethylene oxide) nonionic surfactants polysorbate 80 and polyoxyl hydrogenated castor oil (Kolliphor RH40) using long-timescale MD simulations (0.4-1.7 μs). We also conducted experimental investigations (dilution of formulations with water) including commercial Claritin liquid softgel capsules. The simulations show that LBFs form continuous phase, water-swollen reverse micelles, and bicontinuous and phase-separated systems at different dilutions, which correlate with the experimental observations. This study supports the use of MD simulation as a predictive tool to determine the fate of LBFs composed of medium-chain lipids, polyethylene oxide surfactants, and polymers.
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Affiliation(s)
- Amali G Guruge
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Dallas B Warren
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | | | - Leigh Ford
- Lonza Pharma Sciences, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Hywel D Williams
- Lonza Pharma Sciences, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Vincent Jannin
- Lonza Pharma Sciences, 10 Rue Timken, Colmar 68027, France
| | - Colin W Pouton
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - David K Chalmers
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
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Warren DB, Haque S, McInerney MP, Corbett KM, Kastrati E, Ford L, Williams HD, Jannin V, Benameur H, Porter CJH, Chalmers DK, Pouton CW. Molecular Dynamics Simulations and Experimental Results Provide Insight into Clinical Performance Differences between Sandimmune® and Neoral® Lipid-Based Formulations. Pharm Res 2021; 38:1531-1547. [PMID: 34561814 DOI: 10.1007/s11095-021-03099-5] [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: 07/08/2021] [Accepted: 08/21/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Molecular dynamics (MD) simulations provide an in silico method to study the structure of lipid-based formulations (LBFs) and the incorporation of poorly water-soluble drugs within such formulations. In order to validate the ability of MD to effectively model the properties of LBFs, this work investigates the well-known cyclosporine A formulations, Sandimmune® and Neoral®. Sandimmune® exhibits poor dispersibility and its absorption from the gastrointestinal tract is enhanced when administered after food, whereas Neoral® disperses comparatively well and shows no food effect. METHODS MD simulations were performed of both LBFs to investigate the differences observed in fasted and fed conditions. These conditions were also tested using an in vitro experimental model of dispersion and digestion. RESULTS These MD simulations were able to show that the food effect observed for Sandimmune® can be explained by large changes in drug solubilization on addition of bile. In contrast, Neoral® is well dispersed in water or in simulated fasted conditions, and this dispersion is relatively unchanged on moving to fed conditions. These differences were confirmed using dispersion and digestion in vitro experimental model. CONCLUSIONS The current data suggests that MD simulations are a potential method to model the fate of LBFs in the gastrointestinal tract, predict their dispersion and digestion, investigate behaviour of APIs within the formulations, and provide insights into the clinical performance of LBFs.
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Affiliation(s)
- Dallas B Warren
- Monash Institute of Pharmaceutical Sciences, Melbourne, Australia.
| | - Shadabul Haque
- Monash Institute of Pharmaceutical Sciences, Melbourne, Australia
| | | | - Karen M Corbett
- Monash Institute of Pharmaceutical Sciences, Melbourne, Australia
| | - Endri Kastrati
- Monash Institute of Pharmaceutical Sciences, Melbourne, Australia
| | - Leigh Ford
- Lonza Pharma, Biotech & Nutrition, Melbourne, Australia
| | | | | | | | | | - David K Chalmers
- Monash Institute of Pharmaceutical Sciences, Melbourne, Australia.
| | - Colin W Pouton
- Monash Institute of Pharmaceutical Sciences, Melbourne, Australia.
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5
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Synergistic Computational Modeling Approaches as Team Players in the Game of Solubility Predictions. J Pharm Sci 2020; 110:22-34. [PMID: 33217423 DOI: 10.1016/j.xphs.2020.10.068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/23/2020] [Accepted: 10/28/2020] [Indexed: 11/23/2022]
Abstract
Several approaches to predict and model drug solubility have been used in the drug discovery and development processes during the last decades. Each of these approaches have their own benefits and place, and are typically used as standalone approaches rather than in concert. The synergistic effects of these are often overlooked, partly due to the need of computational experts to perform the modeling and simulations as well as analyzing the data obtained. Here we provide our views on how these different approaches can be used to retrieve more information on drug solubility, ranging from multivariate data analysis over thermodynamic cycle modeling to molecular dynamics simulations. We are discussing aqueous solubility as well as solubility in more complex mixed solvents and media with colloidal structures present. We conclude that the field of computational pharmaceutics is in its early days but with a bright future ahead. However, education of computational formulators with broad knowledge of modeling and simulation approaches is imperative if computational pharmaceutics is to reach its full potential.
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Hossain S, Joyce P, Parrow A, Jõemetsa S, Höök F, Larsson P, Bergström CAS. Influence of Bile Composition on Membrane Incorporation of Transient Permeability Enhancers. Mol Pharm 2020; 17:4226-4240. [PMID: 32960068 PMCID: PMC7610231 DOI: 10.1021/acs.molpharmaceut.0c00668] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
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Transient
permeability enhancers (PEs), such as caprylate, caprate,
and salcaprozate sodium (SNAC), improve the bioavailability of poorly
permeable macromolecular drugs. However, the effects are variable
across individuals and classes of macromolecular drugs and biologics.
Here, we examined the influence of bile compositions on the ability
of membrane incorporation of three transient PEs—caprylate,
caprate, and SNAC—using coarse-grained molecular dynamics (CG-MD).
The availability of free PE monomers, which are important near the
absorption site, to become incorporated into the membrane was higher
in fasted-state fluids than that in fed-state fluids. The simulations
also showed that transmembrane perturbation, i.e.,
insertion of PEs into the membrane, is a key mechanism by which caprylate
and caprate increase permeability. In contrast, SNAC was mainly adsorbed
onto the membrane surface, indicating a different mode of action.
Membrane incorporation of caprylate and caprate was also influenced
by bile composition, with more incorporation into fasted- than fed-state
fluids. The simulations of transient PE interaction with membranes
were further evaluated using two experimental techniques: the quartz
crystal microbalance with dissipation technique and total internal
reflection fluorescence microscopy. The experimental results were
in good agreement with the computational simulations. Finally, the
kinetics of membrane insertion was studied with CG-MD. Variation in
micelle composition affected the insertion rates of caprate monomer
insertion and expulsion from the micelle surface. In conclusion, this
study suggests that the bile composition and the luminal composition
of the intestinal fluid are important factors contributing to the
interindividual variability in the absorption of macromolecular drugs
administered with transient PEs.
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Affiliation(s)
- Shakhawath Hossain
- Department of Pharmacy, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden.,The Swedish Drug Delivery Forum (SDDF), Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
| | - Paul Joyce
- Division of Biological Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Albin Parrow
- Department of Pharmacy, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
| | - Silver Jõemetsa
- Division of Biological Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Fredrik Höök
- Division of Biological Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Per Larsson
- Department of Pharmacy, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden.,The Swedish Drug Delivery Forum (SDDF), Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
| | - Christel A S Bergström
- Department of Pharmacy, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden.,The Swedish Drug Delivery Forum (SDDF), Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
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Successful oral delivery of poorly water-soluble drugs both depends on the intraluminal behavior of drugs and of appropriate advanced drug delivery systems. Eur J Pharm Sci 2019; 137:104967. [PMID: 31252052 DOI: 10.1016/j.ejps.2019.104967] [Citation(s) in RCA: 179] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 05/27/2019] [Accepted: 06/21/2019] [Indexed: 12/11/2022]
Abstract
Poorly water-soluble drugs continue to be a problematic, yet important class of pharmaceutical compounds for treatment of a wide range of diseases. Their prevalence in discovery is still high, and their development is usually limited by our lack of a complete understanding of how the complex chemical, physiological and biochemical processes that occur between administration and absorption individually and together impact on bioavailability. This review defines the challenge presented by these drugs, outlines contemporary strategies to solve this challenge, and consequent in silico and in vitro evaluation of the delivery technologies for poorly water-soluble drugs. The next steps and unmet needs are proposed to present a roadmap for future studies for the field to consider enabling progress in delivery of poorly water-soluble compounds.
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Williams HD, Ford L, Igonin A, Shan Z, Botti P, Morgen MM, Hu G, Pouton CW, Scammells PJ, Porter CJH, Benameur H. Unlocking the full potential of lipid-based formulations using lipophilic salt/ionic liquid forms. Adv Drug Deliv Rev 2019; 142:75-90. [PMID: 31150666 DOI: 10.1016/j.addr.2019.05.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 04/05/2019] [Accepted: 05/27/2019] [Indexed: 12/24/2022]
Abstract
Lipid-based formulations (LBF) are widely used by industry and accepted by the regulatory authorities for oral drug delivery in the pharmaceutical and consumer healthcare market. Innovation in the LBF field is however needed in order to meet the demands of modern drugs, their more challenging problem statements and growing needs for achieving optimal pharmacokinetics (i.e., no food-effects, low variability) on approval. This review describes a new lipophilic salt / ionic liquid approach in combination with LBF, and how this salt strategy can be used to better tailor the properties of a drug to LBFs. The potential advantages of lipophilic salts are discussed in the context of dose escalation studies during toxicological evaluation, reducing the pill burden, increasing drug absorption of new drugs and in life-cycle management. Commentary on lipophilic salt synthesis, scale-up, LBF design and the regulatory aspects are also provided. These topics are discussed in the broad context of bringing the widely recognized advantages of LBFs to a broader spectrum of drugs.
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Affiliation(s)
- Hywel D Williams
- Oral Drug Delivery Innovation, Global Research & Development, Lonza, Monash University, 381 Royal Parade, Parkville, Victoria, Australia
| | - Leigh Ford
- Oral Drug Delivery Innovation, Global Research & Development, Lonza, Monash University, 381 Royal Parade, Parkville, Victoria, Australia
| | - Annabel Igonin
- Pharmaceutical Product Development, Lonza, Ploërmel, France
| | - Zhenhua Shan
- Chemistry, Research & Development, Lonza, Nansha, China
| | - Paolo Botti
- Oral Drug Delivery Innovation, Global Research & Development, Lonza, Strasbourg, France
| | | | - Guixian Hu
- Research & Technology, Lonza, Visp, Switzerland
| | - Colin W Pouton
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Peter J Scammells
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Christopher J H Porter
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia.
| | - Hassan Benameur
- Oral Drug Delivery Innovation, Global Research & Development, Lonza, Strasbourg, France.
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