1
|
Mohammed YH, Namjoshi SN, Jung N, Windbergs M, Benson HAE, Grice JE, Raney SG, Roberts MS. Topical Semisolid Drug Product Critical Quality Attributes with Relevance to Cutaneous Bioavailability and Pharmacokinetics: Part I-Bioequivalence of Acyclovir Topical Creams. Pharm Res 2024:10.1007/s11095-024-03736-9. [PMID: 38955999 DOI: 10.1007/s11095-024-03736-9] [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: 05/19/2024] [Accepted: 06/22/2024] [Indexed: 07/04/2024]
Abstract
PURPOSE To develop a toolkit of test methods for characterizing potentially critical quality attributes (CQAs) of topical semisolid products and to evaluate how CQAs influence the rate and extent of active ingredient bioavailability (BA) by monitoring cutaneous pharmacokinetics (PK) using an In Vitro Permeation Test (IVPT). METHODS Product attributes representing the physicochemical and structural (Q3) arrangement of matter, such as attributes of particles and globules, were assessed for a set of test acyclovir creams (Aciclostad® and Acyclovir 1A Pharma) and compared to a set of reference acyclovir creams (Zovirax® US, Zovirax® UK and Zovirax® Australia). IVPT studies were performed with all these creams using heat-separated human epidermis, evaluated with both, static Franz-type diffusion cells and a flow through diffusion cell system. RESULTS A toolkit developed to characterize quality and performance attributes of these acyclovir topical cream products identified certain differences in the Q3 attributes and the cutaneous PK of acyclovir between the test and reference sets of products. The cutaneous BA of acyclovir from the set of reference creams was substantially higher than from the set of test creams. CONCLUSIONS This research elucidates how differences in the composition or manufacturing of product formulations can alter Q3 attributes that modulate myriad aspects of topical product performance. The results demonstrate the importance of understanding the Q3 attributes of topical semisolid drug products, and of developing appropriate product characterization tests. The toolkit developed here can be utilized to guide topical product development, and to mitigate the risk of differences in product performance, thereby supporting a demonstration of bioequivalence (BE) for prospective topical generic products and reducing the reliance on comparative clinical endpoint BE studies.
Collapse
Affiliation(s)
- Y H Mohammed
- Therapeutics Research Centre, Frazer Institute, The University of Queensland, Brisbane, Australia.
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD, 4102, Australia.
| | - S N Namjoshi
- Therapeutics Research Centre, Frazer Institute, The University of Queensland, Brisbane, Australia
| | - N Jung
- Institute of Pharmaceutical Technology, Goethe University, Frankfurt, Germany
| | - M Windbergs
- Institute of Pharmaceutical Technology, Goethe University, Frankfurt, Germany
| | - H A E Benson
- Curtin Medical School, Curtin University, Perth, WA, Australia
| | - J E Grice
- Therapeutics Research Centre, Frazer Institute, The University of Queensland, Brisbane, Australia
| | - S G Raney
- Office of Research and Standards, Office of Generic Drugs, Center for Drug Evaluation and Research, United States Food and Drug Administration, Silver Spring, MD, USA
| | - M S Roberts
- Therapeutics Research Centre, Frazer Institute, The University of Queensland, Brisbane, Australia
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
- Therapeutics Research Centre, Basil Hetzel Institute for Translational Medical Research, The Queen Elizabeth Hospital, Adelaide, Australia
| |
Collapse
|
2
|
Qian Y, Wei X, Wang Y, Yin S, Chen J, Dong J. Development of a novel human stratum corneum mimetic phospholipid -vesicle-based permeation assay models for in vitro permeation studies. Drug Dev Ind Pharm 2024; 50:410-419. [PMID: 38497274 DOI: 10.1080/03639045.2024.2331242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 03/05/2024] [Indexed: 03/19/2024]
Abstract
OBJECTIVES To develop and evaluate a novel human stratum corneum (SC) mimetic phospholipid vesicle-based permeation assay (PVPASC) model for in vitro permeation studies. SIGNIFICANCE Due to the increasing restrictions on the use of human and animal skins, artificial skin models have attracted substantial interest in pharmaceuticals and cosmetic industries. In this study, a modified PVPASC model containing both SC lipids and proteins was developed. METHODS The PVPASC model was optimized by altering the lipid composition and adding keratin in the formulation of large liposomes. The barrier properties were monitored by measuring the electrical resistance (ER) and permeability of Rhodamine B (RB). The modified PVPASC model was characterized in terms of the surface topography, solvent influence and storage stability. The permeation studies of the active components in Compound Nanxing Zhitong Plaster (CNZP) were performed to examine the capability of PVPASC in the application of skin penetration. RESULTS The ER and Papp values of RB obtained from the optimized PVPASC model indicated a similar barrier property to porcine ear skin. Scanning electron microscope analysis demonstrated a mimic 'brick-and-mortar' structure. The PVPASC model can be stored for three weeks at -20 °C, and withstand the presence of different receptor medium for 24 h. The permeation studies of the active components demonstrated a good correlation (r2 = 0.9136) of Papp values between the drugs' permeation through the PVPASC model and porcine ear skin. CONCLUSION Keratin contained composite phospholipid vesicle-based permeation assay models have been proven to be potential skin tools in topical/transdermal permeation studies.
Collapse
Affiliation(s)
- Yuerong Qian
- Jiangsu Provincial Engineering Research Center of TCM External Medication Development and Application, Nanjing University of Chinese Medicine, Nanjing, PR China
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| | - Xuchao Wei
- Jiangsu Provincial Engineering Research Center of TCM External Medication Development and Application, Nanjing University of Chinese Medicine, Nanjing, PR China
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| | - Yiwei Wang
- Jiangsu Provincial Engineering Research Center of TCM External Medication Development and Application, Nanjing University of Chinese Medicine, Nanjing, PR China
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, China
- ANZAC Research Institute, The University of Sydney, Sydney, Australia
| | - Shaoping Yin
- Jiangsu Provincial Engineering Research Center of TCM External Medication Development and Application, Nanjing University of Chinese Medicine, Nanjing, PR China
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| | - Jun Chen
- Jiangsu Provincial Engineering Research Center of TCM External Medication Development and Application, Nanjing University of Chinese Medicine, Nanjing, PR China
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jie Dong
- Jiangsu Provincial Engineering Research Center of TCM External Medication Development and Application, Nanjing University of Chinese Medicine, Nanjing, PR China
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, PR China
| |
Collapse
|
3
|
Opatha SAT, Chutoprapat R, Khankaew P, Titapiwatanakun V, Ruksiriwanich W, Boonpisuttinant K. Asiatic acid-entrapped transfersomes for the treatment of hypertrophic scars: In vitro appraisal, bioactivity evaluation, and clinical study. Int J Pharm 2024; 651:123738. [PMID: 38158144 DOI: 10.1016/j.ijpharm.2023.123738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/05/2023] [Accepted: 12/22/2023] [Indexed: 01/03/2024]
Abstract
Non-invasive treatment options for hypertrophic scars (HTS) are limited, and treating HTS remains challenging due to their unappealing appearance and associated social stigma. In this work, a novel transfersomal system named Asiatic acid-entrapped transfersomes (AATs) was prepared. AATs were evaluated for their skin permeability, anti-inflammatory activity, and other characteristic parameters to determine the most promising formulation. Asiatic acid-entrapped transfersomal gel (AATG), which was obtained by incorporating the lead AATs in a gel base, underwent testing in an 8-week, double-blind, placebo-controlled, split-skin clinical study. The net skin elasticity (R5), melanin index (MI), and skin surface hydration were analyzed employing Cutometer®, Mexameter®, and Corneometer®, respectively, in order to evaluate the effectiveness of the developed AATG. AATs exhibited vesicular sizes and zeta potential values within the range of (27.15 ± 0.95 to 63.54 ± 2.51 nm) and (-0.010 to -0.129 mV), respectively. TW80AAT gave the highest %EE (90.84 ± 2.99%), deformability index (101.70 ± 11.59 mgs-1), permeation flux at 8 h (0.146 ± 0.005 mg/cm2/h), and anti-inflammatory activity (71.65 ± 1.83%). The clinical study results of AATG indicated no adverse skin reactions. Furthermore, product efficacy tests demonstrated a significant reduction in MI and an increase in net skin elasticity at 2, 4, and 8 weeks. These pilot study outcomes support the effectiveness of the AATG.
Collapse
Affiliation(s)
- Shakthi Apsara Thejani Opatha
- Pharmaceutical Sciences and Technology Program, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10300, Thailand
| | - Romchat Chutoprapat
- Pharmaceutical Sciences and Technology Program, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10300, Thailand.
| | - Pichanon Khankaew
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10300, Thailand
| | - Varin Titapiwatanakun
- Pharmaceutical Sciences and Technology Program, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10300, Thailand
| | - Warintorn Ruksiriwanich
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand; Center of Excellence in Agro Bio-Circular-Green Industry (Agro BCG), Agro-Industry, Chiang Mai University, Chiang Mai 50100, Thailand; Lanna Rice Research Center, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Korawinwich Boonpisuttinant
- Innovative Natural Products from Thai Wisdoms (INPTW), Faculty of Integrative Medicine, Rajamangala University of Technology Thanyaburi, Pathumthani, 12130, Thailand
| |
Collapse
|
4
|
Sarnthiratch M, Alsheddi L, Nimmansophon P, Wanasathop A, Li SK. Effect of Receptor Solution in Studies of In Vitro Permeation Test (IVPT). J Pharm Sci 2024; 113:407-418. [PMID: 37972891 DOI: 10.1016/j.xphs.2023.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 11/08/2023] [Accepted: 11/08/2023] [Indexed: 11/19/2023]
Abstract
In Vitro Permeation Test (IVPT) is commonly used to evaluate skin penetration of chemicals and performance of dermatological products. For a permeant with low aqueous solubility, an additive that is expected not to alter the skin barrier can be used in the receptor solution to improve permeant solubility. The objective of this study was to (a) evaluate the effects of these additives in IVPT receptor solution on skin permeability of model permeants and skin electrical resistance and (b) determine the solubility of the permeants in these receptor solutions. Bovine serum albumin (BSA), 2-hydroxypropyl-beta-cyclodextrin (HPCD), ethanol, nonionic surfactant Brij-98, and propylene glycol were the additives, and phosphate buffered saline (PBS) was the control. Steady-state skin permeability coefficients and resistances were determined. The receptor solutions examined in this study did not cause a significant increase in skin permeability or decrease in resistance (less than 40 % changes) except 25 % ethanol. The receptor solution containing 25 % ethanol induced an approximately twofold average increase in skin permeability and reduced skin electrical resistance by approximately threefold. The receptor solution of 2.5 % HPCD provided the highest levels of solubility for the model lipophilic permeants, while 0.2 % Brij-98 and 5 % ethanol showed the lowest solubility enhancement from those in PBS.
Collapse
Affiliation(s)
- Minthira Sarnthiratch
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH 45267, United States
| | - Lama Alsheddi
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH 45267, United States
| | - Patcharawan Nimmansophon
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH 45267, United States
| | - Apipa Wanasathop
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH 45267, United States
| | - S Kevin Li
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH 45267, United States.
| |
Collapse
|
5
|
Khalid GM, Billa N. Drug-Eluting Sutures by Hot-Melt Extrusion: Current Trends and Future Potentials. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7245. [PMID: 38005174 PMCID: PMC10672932 DOI: 10.3390/ma16227245] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 11/06/2023] [Accepted: 11/16/2023] [Indexed: 11/26/2023]
Abstract
Surgical site infections (SSIs) may result from surgical procedures requiring a secondary administration of drugs at site or systemically in treating the infection. Drug-eluting sutures containing antimicrobial agents symbolise a latent strategy that precludes a secondary drug administration. It also offers the possibility of delivering a myriad of therapeutic agents to a localised wound site to effect analgesia, anti-inflammation, or the deployment of proteins useful for wound healing. Further, the use of biodegradable drug-eluting sutures eliminates the need for implanting foreign material into the wound, which needs to be removed after healing. In this review, we expound on recent trends in the manufacture of drug-eluting sutures with a focus on the hot-melt extrusion (HME) technique. HME provides a solvent-free, continuous one-step manufacturing conduit for drug-eluting sutures, hence, there is no drying step, which can be detrimental to the drug or suture threads and, thus, environmentally friendly. There is the possibility of combining the technology with additive manufacturing platforms to generate personalised drug-loaded implantable devices through prototyping and scalability. The review also highlights key material requirements for fabricating drug-eluting sutures by HME, as well as quality attributes. Finally, a preview of emerging drug-eluting sutures and advocacy for harmonisation of quality assurance by regulatory authorities that permits quality evaluation of novelty sutures is presented.
Collapse
Affiliation(s)
- Garba M. Khalid
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK;
- FabRx Ltd., Henwood House, Henwood, Asford TN24 8DH, UK
| | - Nashiru Billa
- Pharmaceutical Sciences Department, College of Pharmacy, QU Health, Qatar University, Doha P.O. Box 2713, Qatar
| |
Collapse
|
6
|
Evans MV, Moxon TE, Lian G, Deacon BN, Chen T, Adams LD, Meade A, Wambaugh JF. A regression analysis using simple descriptors for multiple dermal datasets: Going from individual membranes to the full skin. J Appl Toxicol 2023; 43:940-950. [PMID: 36609694 PMCID: PMC10367137 DOI: 10.1002/jat.4435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 01/04/2023] [Accepted: 01/05/2023] [Indexed: 01/09/2023]
Abstract
In silico methods to estimate and/or quantify skin absorption of chemicals as a function of chemistry are needed to realistically predict pharmacological, occupational, and environmental exposures. The Potts-Guy equation is a well-established approach, using multi-linear regression analysis describing skin permeability (Kp) in terms of the octanol/water partition coefficient (logP) and molecular weight (MW). In this work, we obtained regression equations for different human datasets relevant to environmental and cosmetic chemicals. Since the Potts-Guy equation was published in 1992, we explored recent datasets that include different skin layers, such as dermatomed (including dermis to a defined thickness) and full skin. Our work was consistent with others who have observed that fits to the Potts-Guy equation are stronger for experiments focused on the epidermis. Permeability estimates for dermatomed skin and full skin resulted in low regression coefficients when compared to epidermis datasets. An updated regression equation uses a combination of fitted permeability values obtained with a published 2D compartmental model previously evaluated. The resulting regression equation was: logKp = -2.55 + 0.65logP - 0.0085MW, R2 = 0.91 (applicability domain for all datasets: MW ranges from 18 to >584 g/mol and -4 to >5 for logP). This approach demonstrates the advantage of combining mechanistic with structural activity relationships in a single modeling approach. This combination approach results in an improved regression fit when compared to permeability estimates obtained using the Potts-Guy approach alone. The analysis presented in this work assumes a one-compartment skin absorption route; future modeling work will consider adding multiple compartments.
Collapse
Affiliation(s)
- Marina V. Evans
- Center for Computational Toxicology and Exposure, ORD, RTP, US EPA, Durham, North Carolina, USA
| | - Thomas E. Moxon
- Unilever Safety and Environmental Assurance Centre, Bedfordshire, UK
| | | | - Benjamin N. Deacon
- Department of Chemical and Processing Engineering, UK University of Surrey, Guildford, UK
| | - Tao Chen
- Department of Chemical and Processing Engineering, UK University of Surrey, Guildford, UK
| | - Linda D. Adams
- Center for Computational Toxicology and Exposure, ORD, RTP, US EPA, Durham, North Carolina, USA
| | | | - John F. Wambaugh
- Center for Computational Toxicology and Exposure, ORD, RTP, US EPA, Durham, North Carolina, USA
| |
Collapse
|
7
|
Science of, and insights into, thermodynamic principles for dermal formulations. Drug Discov Today 2023; 28:103521. [PMID: 36754143 DOI: 10.1016/j.drudis.2023.103521] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 01/24/2023] [Accepted: 02/01/2023] [Indexed: 02/09/2023]
Abstract
Studies have demonstrated the significant role of the thermodynamic activity of drugs in skin drug delivery. This thermodynamic activity works as a driving force for increasing/improving the absorption of drugs by the skin. It can be changed according to the physicochemical parameters (e.g., solubility, partition coefficient, and water activity) of the drug in the vehicle. Thermodynamic principles have been used for the development of novel topical and transdermal delivery systems, demonstrating the importance of thermodynamic activity in enhancing drug permeation through the skin. In this review, we provide insights into thermodynamic principles and their roles in optimizing topical and transdermal drug delivery systems.
Collapse
|
8
|
Zhang Q, Alinaghi A, Williams DB, Roberts MS. A thermodynamic and kinetic analysis of human epidermal penetration of phenolic compounds: II. Maximum flux and solute diffusion through stratum corneum lipids. Int J Pharm 2023; 631:122522. [PMID: 36563793 DOI: 10.1016/j.ijpharm.2022.122522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 11/17/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
Warming the skin is a key means of promoting solute permeation through the skin. Changes in solute permeation associated with variations in skin temperature also assist in understanding the mechanism by which solutes permeate the skin. However, few studies have considered the relative impact of temperature on the main determinants of the maximum flux for a solute across the skin, the solubility of a solute and its diffusivity in the stratum corneum. In this study, we quantified for the first time the thermodynamics associated with the maximum skin fluxes for a series of phenolic compounds of similar size but with varying lipophilicity (defined by the logarithms of their octanol/water partition coefficient, logP). These studies were undertaken using aqueous donor solutions (along with testosterone as a reference solute) across human epidermal membranes in vertical Franz diffusion cells at 4 °C, 24 °C and 37 °C with intermittent receptor sampling and volume replacement over 24 h. Kinetic and thermodynamic analyses included the estimation of the stratum corneum (SC) apparent SC diffusivity from the SC maximum fluxes and SC solubilities and the associated activation energies, enthalpies and entropies for diffusion. The key findings were that the differences in the maximum flux of phenolic compounds varying in lipophilicity mainly arose from differences in SC solubility at the various temperatures and that, at the highest temperature, SC permeability and SC diffusion were affected by SC lipid fluidisation and that variations in SC - water partitioning enthalpies explain some of the previously low activation energies for permeation of the more lipophilic phenols. Higher enthalpies for diffusion were seen for solutes with addition hydrogen bonding capacity and the highest negative entropy was observed with the more compact solutes. Various relationships between the derived thermodynamic parameters were explored and interpreted in a proposed model for solute partitioning into and permeation through the SC intercellular lipid lamellae.
Collapse
Affiliation(s)
- Qian Zhang
- Clinical and Health Sciences, University of South Australia, Adelaide SA 5001, Australia; Current address: Acrux DDS Pty Ltd, 103-113 Stanley St, West Melbourne, VIC 3003, Australia
| | - Azadeh Alinaghi
- Clinical and Health Sciences, University of South Australia, Adelaide SA 5001, Australia; Basil Hetzel Institute for Translational Health Research, The Queen Elizabeth Hospital, Adelaide, SA, Australia
| | - Desmond B Williams
- Clinical and Health Sciences, University of South Australia, Adelaide SA 5001, Australia
| | - Michael S Roberts
- Clinical and Health Sciences, University of South Australia, Adelaide SA 5001, Australia; Basil Hetzel Institute for Translational Health Research, The Queen Elizabeth Hospital, Adelaide, SA, Australia; Therapeutics Research Centre, Frazer Institute, University of Queensland, Translational Research Institute, Brisbane, QLD, Australia.
| |
Collapse
|
9
|
Alinaghi A, Macedo A, Cheruvu HS, Holmes A, Roberts MS. Human epidermal in vitro permeation test (IVPT) analyses of alcohols and steroids. Int J Pharm 2022; 627:122114. [PMID: 35973591 DOI: 10.1016/j.ijpharm.2022.122114] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 08/09/2022] [Accepted: 08/11/2022] [Indexed: 12/22/2022]
Abstract
This study examined a number of factors that can impact the outcomes of in vitro human epidermal permeation coefficients for aliphatic alcohols and steroids, including receptor phase composition and study conditions. We determined experimentally the solubilities and IVPT permeation of a homologous series of 14C labeled aliphatic alcohols (ethanol, propanol, pentanol, heptanol, octanol and decanol) in different receptor fluids as recommended by Organisation Economic Co-operation and Development (OECD). We used human epidermal membranes at 25°C and phosphate-buffered saline (PBS), 2% w/v bovine serum albumin (2%w/v BSA), 50% v/v ethanol and 0.1, 2 and 6% w/v Oleth-20 receptor phases. We also explored and confirmed the discrepancies between in vitro human epidermal permeability coefficients (kp) and diffusion lag times for steroids from Scheuplein's group with our own work and that of others. The main reason for the observed differences is not clear but is likely to be multifactorial, including the effects of diffusion cell design, receptor phase solubility, unstirred receptor phase effects, epidermal membrane hydration, diffusion cell configuration, transport through appendageal pathways and steroid lipophilicity. We conclude with a summary of experimental conditions that should be considered in undertaking IVPT studies.
Collapse
Affiliation(s)
- Azadeh Alinaghi
- Clinical and Medical Sciences, University of South Australia, Adelaide, Australia and The Basil Hetzel Institute for Translational Health Research, Adelaide, Australia
| | - Ana Macedo
- Clinical and Medical Sciences, University of South Australia, Adelaide, Australia and The Basil Hetzel Institute for Translational Health Research, Adelaide, Australia
| | - Hanumanth S Cheruvu
- Diamantina Research Institute, The University of Queensland, Translational Research Institute, Brisbane, Australia
| | - Amy Holmes
- Clinical and Medical Sciences, University of South Australia, Adelaide, Australia and The Basil Hetzel Institute for Translational Health Research, Adelaide, Australia
| | - Michael S Roberts
- Clinical and Medical Sciences, University of South Australia, Adelaide, Australia and The Basil Hetzel Institute for Translational Health Research, Adelaide, Australia; Diamantina Research Institute, The University of Queensland, Translational Research Institute, Brisbane, Australia.
| |
Collapse
|
10
|
Compartmental modeling of skin absorption and desorption kinetics: Donor solvent evaporation, variable diffusion/partition coefficients, and slow equilibration process within stratum corneum. Int J Pharm 2022; 623:121902. [PMID: 35691525 DOI: 10.1016/j.ijpharm.2022.121902] [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: 11/17/2021] [Revised: 06/05/2022] [Accepted: 06/06/2022] [Indexed: 11/21/2022]
Abstract
This work expands the recently developed compartmental model for skin transport to model variable diffusion and/or partition coefficients, and the presence of slow equilibration/slow binding kinetics within stratum corneum. The model was validated by comparing it with the diffusion model which was solved numerically using the finite element method. It was found that the new compartmental model predictions agreed well with that of the diffusion model, providing a sufficient number of compartments was used. The compartmental model was applied to two previously published experimental data sets: water penetration and desorption data and the finite dose dermal penetration of testosterone. Significant improvement of the fitting quality for all these data sets was achieved using the compartmental model.
Collapse
|
11
|
Silva IR, Lima FA, Reis ECO, Ferreira LAM, Goulart GAC. Stepwise Protocols for Preparation and Use of Porcine Ear Skin for in Vitro Skin Permeation Studies Using Franz Diffusion Cells. Curr Protoc 2022; 2:e391. [PMID: 35290730 DOI: 10.1002/cpz1.391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The skin, the largest organ of the body, is an attractive route of topical and systemic drug administration. During the development of topical formulations, in vitro skin permeation studies using biological membranes mounted in Franz diffusion cells are a useful tool to assess the permeation of substances through the skin, and are recommended by the Organization for Economic Cooperation and Development (OECD). Among the types of biological membranes used in such studies, porcine ear skin has been identified as the most promising, due to its similarities to human skin and its greater accessibility as compared to human skin. To standardize techniques for the preparation and use of porcine ear skin as biological membrane, here we present systematic procedures for the selection of porcine ears, their cleaning, the removal of skin from cartilage, its transformation into membranes, and its use for the in vitro assessment of the permeation of drugs from topical formulations. © 2022 Wiley Periodicals LLC. Basic Protocol 1: Obtaining porcine ear membranes Basic Protocol 2: Preparation of membranes from porcine ear skin and use of membranes for in vitro skin permeation studies.
Collapse
Affiliation(s)
- Izabela R Silva
- Department of Pharmaceutics, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Brazil
| | - Flávia A Lima
- Department of Pharmaceutics, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Brazil
| | - Eduardo C O Reis
- Department of Pharmaceutics, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Brazil
| | - Lucas A M Ferreira
- Department of Pharmaceutics, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Brazil
| | - Gisele A C Goulart
- Department of Pharmaceutics, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Brazil
| |
Collapse
|
12
|
Roberts MS, Cheruvu HS, Mangion SE, Alinaghi A, Benson HA, Mohammed Y, Holmes A, van der Hoek J, Pastore M, Grice JE. Topical drug delivery: History, percutaneous absorption, and product development. Adv Drug Deliv Rev 2021; 177:113929. [PMID: 34403750 DOI: 10.1016/j.addr.2021.113929] [Citation(s) in RCA: 78] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/05/2021] [Accepted: 08/11/2021] [Indexed: 02/07/2023]
Abstract
Topical products, widely used to manage skin conditions, have evolved from simple potions to sophisticated delivery systems. Their development has been facilitated by advances in percutaneous absorption and product design based on an increasingly mechanistic understanding of drug-product-skin interactions, associated experiments, and a quality-by-design framework. Topical drug delivery involves drug transport from a product on the skin to a local target site and then clearance by diffusion, metabolism, and the dermal circulation to the rest of the body and deeper tissues. Insights have been provided by Quantitative Structure Permeability Relationships (QSPR), molecular dynamics simulations, and dermal Physiologically Based PharmacoKinetics (PBPK). Currently, generic product equivalents of reference-listed products dominate the topical delivery market. There is an increasing regulatory interest in understanding topical product delivery behavior under 'in use' conditions and predicting in vivo response for population variations in skin barrier function and response using in silico and in vitro findings.
Collapse
|
13
|
Theochari I, Mitsou E, Nikolic I, Ilic T, Dobricic V, Pletsa V, Savic S, Xenakis A, Papadimitriou V. Colloidal nanodispersions for the topical delivery of Ibuprofen: Structure, dynamics and bioperformances. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116021] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
14
|
Liu X, Anissimov YG, Grice JE, Cheruvu HS, Ghosh P, Raney SG, Maibach HI, Roberts MS. Relating transdermal delivery plasma pharmacokinetics with in vitro permeation test (IVPT) findings using diffusion and compartment-in-series models. J Control Release 2021; 334:37-51. [PMID: 33857564 DOI: 10.1016/j.jconrel.2021.04.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 04/08/2021] [Accepted: 04/11/2021] [Indexed: 02/06/2023]
Abstract
Increasing emphasis is being placed on using in vitro permeation test (IVPT) results for topical products as a surrogate for their in vivo behaviour. This study sought to relate in vivo plasma concentration - time pharmacokinetic (PK) profiles after topical application of drug products to IVPT findings with mechanistic diffusion and compartment models that are now widely used to describe permeation of solutes across the main skin transport barrier, the stratum corneum. Novel in vivo forms of the diffusion and compartment-in-series models were developed by combining their IVPT model forms with appropriate in vivo disposition functions. Available in vivo and IVPT data were then used with the models in data analyses, including the estimation of prediction intervals for in vivo plasma concentrations derived from IVPT data. The resulting predicted in vivo plasma concentration - time profiles for the full models corresponded closely with the observed results for both nitroglycerin and rivastigmine at all times. In contrast, reduced forms of these in vivo models led to discrepancies between model predictions and observed results at early times. A two-stage deconvolution procedure was also used to estimate the in vivo cumulative amount absorbed and shown to be linearly related to that from IVPT, with an acceptable prediction error. External predictability was also shown using a separate set of in vitro and in vivo data for different nitroglycerin patches. This work suggests that mechanistic and physiologically based pharmacokinetic models can be used to predict in vivo behaviour from IVPT data for topical products.
Collapse
Affiliation(s)
- Xin Liu
- Therapeutics Research Group, The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia
| | - Yuri G Anissimov
- School of Environment and Science, Griffith University, Parklands Drive, Southport, QLD 4222, Australia
| | - Jeffrey E Grice
- Therapeutics Research Group, The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia.
| | - Hanumanth Srikanth Cheruvu
- Therapeutics Research Group, The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia
| | - Priyanka Ghosh
- Division of Therapeutic Performance, Office of Research and Standards, Office of Generic Drugs, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Sam G Raney
- Division of Therapeutic Performance, Office of Research and Standards, Office of Generic Drugs, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Howard I Maibach
- Department of Dermatology, University of California, San Francisco, California, USA
| | - Michael S Roberts
- Therapeutics Research Group, The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia; Therapeutics Research Centre, University of South Australia Division of Clinical and Health Sciences, Basil Hetzel Institute for Translational Medical Research, The Queen Elizabeth Hospital, Woodville, SA 5011, Australia
| |
Collapse
|
15
|
Benson HAE, Grice JE, Mohammed Y, Namjoshi S, Roberts MS. Topical and Transdermal Drug Delivery: From Simple Potions to Smart Technologies. Curr Drug Deliv 2019; 16:444-460. [PMID: 30714524 PMCID: PMC6637104 DOI: 10.2174/1567201816666190201143457] [Citation(s) in RCA: 142] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/16/2019] [Accepted: 01/25/2019] [Indexed: 01/02/2023]
Abstract
This overview on skin delivery considers the evolution of the principles of percutaneous ab-sorption and skin products from ancient times to today. Over the ages, it has been recognised that products may be applied to the skin for either local or systemic effects. As our understanding of the anatomy and physiology of the skin has improved, this has facilitated the development of technologies to effectively and quantitatively deliver solutes across this barrier to specific target sites in the skin and beyond. We focus on these technologies and their role in skin delivery today and in the future.
Collapse
Affiliation(s)
- Heather A E Benson
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University of Technology, Perth, Australia
| | - Jeffrey E Grice
- Diamantina Institute, The University of Queensland, Translational Research Institute, QLD, 4102, Australia
| | - Yousuf Mohammed
- Diamantina Institute, The University of Queensland, Translational Research Institute, QLD, 4102, Australia
| | - Sarika Namjoshi
- Diamantina Institute, The University of Queensland, Translational Research Institute, QLD, 4102, Australia
| | - Michael S Roberts
- Diamantina Institute, The University of Queensland, Translational Research Institute, QLD, 4102, Australia.,School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| |
Collapse
|
16
|
Topical Nano and Microemulsions for Skin Delivery. Pharmaceutics 2017; 9:pharmaceutics9040037. [PMID: 28934172 PMCID: PMC5750643 DOI: 10.3390/pharmaceutics9040037] [Citation(s) in RCA: 184] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/11/2017] [Accepted: 09/13/2017] [Indexed: 11/17/2022] Open
Abstract
Nanosystems such as microemulsions (ME) and nanoemulsions (NE) offer considerable opportunities for targeted drug delivery to and via the skin. ME and NE are stable colloidal systems composed of oil and water, stabilised by a mixture of surfactants and cosurfactants, that have received particular interest as topical skin delivery systems. There is considerable scope to manipulate the formulation components and characteristics to achieve optimal bioavailability and minimal skin irritancy. This includes the incorporation of established chemical penetration enhancers to fluidize the stratum corneum lipid bilayers, thus reducing the primary skin barrier and increasing permeation. This review discusses nanosystems with utility in skin delivery and focuses on the composition and characterization of ME and NE for topical and transdermal delivery. The mechanism of skin delivery across the stratum corneum and via hair follicles is reviewed with particular focus on the influence of formulation.
Collapse
|
17
|
Bhuiyan A, Waters L. Permeation of pharmaceutical compounds through silicone membrane in the presence of surfactants. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.12.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
18
|
Yousef S, Mohammed Y, Namjoshi S, Grice J, Sakran W, Roberts M. Mechanistic Evaluation of Hydration Effects on the Human Epidermal Permeation of Salicylate Esters. AAPS JOURNAL 2016; 19:180-190. [PMID: 27634383 DOI: 10.1208/s12248-016-9984-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 08/30/2016] [Indexed: 11/30/2022]
Abstract
We sought to understand when and how hydration enhances the percutaneous absorption of salicylate esters. Human epidermal membrane fluxes and stratum corneum solubilities of neat and diluted solutions of three esters were determined under hydrated and dehydrated conditions. Hydration doubled the human epidermal flux seen for methyl and ethyl salicylate under dehydrated conditions and increased the flux of neat glycol salicylate 10-fold. Mechanistic analyses showed that this hydration-induced enhancement arises mainly from an increase in the stratum corneum diffusivity of the three esters. Further, we showed that unlike methyl and ethyl salicylate, glycol salicylate is hygroscopic and the ∼10-fold hydration-induced flux enhancement seen with neat glycol salicylate may be due to its ability to hydrate the stratum corneum to a greater extent. The hydration-induced enhancements in in vitro epidermal flux seen here for glycol and ethyl salicylate were similar to those reported for their percutaneous absorption rates in a comparable in vivo study, whilst somewhat higher enhancement was seen for methyl salicylate in vivo. This may be explained by a physiologically induced self enhancement of neat methyl salicylate absorption in vivo which is not applicable in vitro.
Collapse
Affiliation(s)
- Shereen Yousef
- Therapeutics Research Centre, School of Medicine, University of Queensland, Translational Research Institute, Brisbane, Australia.,School of Pharmacy, Helwan University, Helwan, Egypt
| | - Yousuf Mohammed
- Therapeutics Research Centre, School of Medicine, University of Queensland, Translational Research Institute, Brisbane, Australia
| | - Sarika Namjoshi
- Therapeutics Research Centre, School of Medicine, University of Queensland, Translational Research Institute, Brisbane, Australia
| | - Jeffrey Grice
- Therapeutics Research Centre, School of Medicine, University of Queensland, Translational Research Institute, Brisbane, Australia
| | - Wedad Sakran
- School of Pharmacy, Helwan University, Helwan, Egypt
| | - Michael Roberts
- Therapeutics Research Centre, School of Medicine, University of Queensland, Translational Research Institute, Brisbane, Australia. .,School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia. .,Therapeutics Research Centre, The University of Queensland School of Medicine-Translational Research Institute, 37 Kent St, Woolloongabba, Brisbane, QLD, 4102, Australia.
| |
Collapse
|