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Yang J, Shi C, Cheng Y, Zhu Y, Yang X, Liang Y, Liang H, Lin Q, Li M, Xun J, Liu J, Yin C, Qi J, Zhu H. Effective in vivo reactivation of HIV-1 latency reservoir via oral administration of EK-16A-SNEDDS. Eur J Pharm Biopharm 2024; 201:114353. [PMID: 38885911 DOI: 10.1016/j.ejpb.2024.114353] [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: 03/22/2024] [Revised: 05/29/2024] [Accepted: 06/07/2024] [Indexed: 06/20/2024]
Abstract
The latent reservoir of human immunodeficiency virus (HIV) is a major obstacle in the treatment of acquired immune deficiency syndrome (AIDS). The "shock and kill" strategy has emerged as a promising approach for clearing HIV latent reservoirs. However, current latency-reversing agents (LRAs) have limitations in effectively and safely activating the latent virus and reducing the HIV latent reservoirs in clinical practice. Previously, EK-16A was extracted from Euphorbia kansui, which had the effect of interfering with the HIV-1 latent reservoir and inhibiting HIV-1 entry. Nevertheless, there is no suitable and efficient EK-16A oral formulation for in vivo delivery and clinical use. In this study, an oral EK-16A self-nanoemulsifying drug delivery system (EK-16A-SNEDDS) was proposed to "shock" the HIV-1 latent reservoir. This system aims to enhance the bioavailability and delivery of EK-16A to various organs. The composition of EK-16A-SNEDDS was optimized through self-emulsifying grading and ternary phase diagram tests. Cell models, pharmacokinetic experiments, and pharmacodynamics in HIV-1 latent cell transplant animal models suggested that EK-16A-SNEDDS could be absorbed by the gastrointestinal tract and enter the blood circulation after oral administration, thereby reaching various organs to activate latent HIV-1. The prepared EK-16A-SNEDDS demonstrated safety and efficacy, exhibited high clinical experimental potential, and may be a promising oral preparation for eliminating HIV-1 latent reservoirs.
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Affiliation(s)
- Jinlong Yang
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China; Key Laboratory of Smart Drug Delivery of MOE, School of Pharmacy, Fudan University, Shanghai 201203, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai 200443, China
| | - Chenyi Shi
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Yipeng Cheng
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Yuqi Zhu
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Xinyi Yang
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China; Yiwu Research Institute of Fudan University, Yiwu 322000, China
| | - Yue Liang
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Huitong Liang
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Qinru Lin
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Min Li
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Jingna Xun
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Jianping Liu
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Chunhua Yin
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China.
| | - Jianping Qi
- Key Laboratory of Smart Drug Delivery of MOE, School of Pharmacy, Fudan University, Shanghai 201203, China.
| | - Huanzhang Zhu
- State Key Laboratory of Genetic Engineering and Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200438, China.
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Patel RP, Cristofoletti R, Wu F, Shoyaib AA, Polli JE. In Vitro Lipolysis Model to Predict Food Effect of Poorly Water-Soluble Drugs Itraconazole, Rivaroxaban, and Ritonavir. J Pharm Sci 2024; 113:2361-2373. [PMID: 38614321 DOI: 10.1016/j.xphs.2024.04.007] [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: 03/06/2024] [Revised: 04/06/2024] [Accepted: 04/06/2024] [Indexed: 04/15/2024]
Abstract
It is desirable to predict positive food effect of oral formulations due to food mediated dissolution enhancement of lipophilic drugs. The objective was to assess the ability of in vitro lipolysis to anticipate a positive food effect. Tested formulations included rivaroxaban and itraconazole, where some formulations, but not all, exhibit a positive food effect in vivo in humans. Amorphous solid dispersion formulations of ritonavir, which exhibit a negative food effect in vivo in humans, were also studied. Fe-lipolysis and Fa-lipolysis media representing fed and fasted intestinal conditions were used. Results show frequent agreement between in vitro lipolysis predictions and in vivo human outcomes. For rivaroxaban, food effect of unformulated active pharmaceutical ingredient (API) and products were correctly predicted where 2.5 mg and 10 mg strengths did not show any food effect; however, 20 mg did show a positive food effect. For itraconazole, all four products were correctly predicted, with Sporanox, Sempera, and generic capsules having a food effect, but Tolsura not having a positive food effect. For ritonavir, lipolysis predicted a positive food effect for API and Norvir tablet and powder, but Norvir products have negative food effect in vivo in humans. Overall, the lipolysis model showed favorable predictability and merits additional evaluation.
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Affiliation(s)
- Roshni P Patel
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, MD 21201, USA
| | - Rodrigo Cristofoletti
- Department of Pharmaceutics, Center for Pharmacometrics and Systems Pharmacology, College of Pharmacy, University of Florida, Orlando, FL, USA
| | - Fang Wu
- Office of Generic Drugs, Food and Drug Administration, White Oak, MD, USA
| | | | - James E Polli
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, MD 21201, USA.
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3
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Han G, Duan X, Jiang B, Li Y, Li B, Yang J, Pan S, Liu F. Emulsifying properties, in vitro digestive characteristics, and β-carotene bioaccessibility of mandarin peel pectin emulsions prepared with different carrier oil phases. Int J Biol Macromol 2023; 242:124961. [PMID: 37207755 DOI: 10.1016/j.ijbiomac.2023.124961] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 03/10/2023] [Accepted: 05/16/2023] [Indexed: 05/21/2023]
Abstract
Mandarin peel pectin (MPP) emulsions were prepared with different oil phase loadings with or without β-carotene, and their emulsifying characteristics, digestive properties and β-carotene bioaccessibility were investigated. Results revealed that all MPP emulsions exhibited good loading efficiency for β-carotene, while their apparent viscosity and interfacial pressure (π) of MPP emulsions increased significantly after the addition of β-carotene. Emulsification of MPP emulsions as well as digestibility were significantly dependent on the kind of oil. MPP emulsions prepared with long-chain triglycerides (LCT) oil (soybean, corn, and olive oil) exhibited higher volume average particle size (D4,3), apparent viscosity, π values, and bioaccessibility of carotene compared to those prepared with medium-chain oils (MCT). MPP emulsions with LCT rich in monosaturated fatty acids (olive oil) had the highest β-carotene encapsulation efficiency, bioaccessibility, etc. than from other oils. This study provides a theoretical basis for the efficient encapsulation and high bioaccessibility of carotenoids with pectin emulsions.
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Affiliation(s)
- Guoliang Han
- College of Food Science and Technology, Huazhong agricultural university, Wuhan, Hubei, PR China; Key Laboratory of Environment Correlative Dietology, Ministry of Education, PR China; Hubei Key Laboratory of Fruit & Vegetable Processing & Quality Control, Huazhong Agricultural University, Wuhan, Hubei, PR China
| | - Xingke Duan
- College of Food Science and Technology, Huazhong agricultural university, Wuhan, Hubei, PR China; Key Laboratory of Environment Correlative Dietology, Ministry of Education, PR China; Hubei Key Laboratory of Fruit & Vegetable Processing & Quality Control, Huazhong Agricultural University, Wuhan, Hubei, PR China
| | - Bing Jiang
- Library, Huazhong Agricultural University, Wuhan 430070, Hubei, PR China
| | - Yifan Li
- College of Food Science and Technology, Huazhong agricultural university, Wuhan, Hubei, PR China; Key Laboratory of Environment Correlative Dietology, Ministry of Education, PR China; Hubei Key Laboratory of Fruit & Vegetable Processing & Quality Control, Huazhong Agricultural University, Wuhan, Hubei, PR China
| | - Bowen Li
- College of Food Science and Technology, Huazhong agricultural university, Wuhan, Hubei, PR China; Key Laboratory of Environment Correlative Dietology, Ministry of Education, PR China; Hubei Key Laboratory of Fruit & Vegetable Processing & Quality Control, Huazhong Agricultural University, Wuhan, Hubei, PR China
| | - Jinyan Yang
- College of Food Science and Technology, Huazhong agricultural university, Wuhan, Hubei, PR China; Key Laboratory of Environment Correlative Dietology, Ministry of Education, PR China; Hubei Key Laboratory of Fruit & Vegetable Processing & Quality Control, Huazhong Agricultural University, Wuhan, Hubei, PR China
| | - Siyi Pan
- College of Food Science and Technology, Huazhong agricultural university, Wuhan, Hubei, PR China; Key Laboratory of Environment Correlative Dietology, Ministry of Education, PR China; Hubei Key Laboratory of Fruit & Vegetable Processing & Quality Control, Huazhong Agricultural University, Wuhan, Hubei, PR China
| | - Fengxia Liu
- College of Food Science and Technology, Huazhong agricultural university, Wuhan, Hubei, PR China; Key Laboratory of Environment Correlative Dietology, Ministry of Education, PR China; Hubei Key Laboratory of Fruit & Vegetable Processing & Quality Control, Huazhong Agricultural University, Wuhan, Hubei, PR China.
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Milinčić DD, Salević-Jelić AS, Kostić AŽ, Stanojević SP, Nedović V, Pešić MB. Food nanoemulsions: how simulated gastrointestinal digestion models, nanoemulsion, and food matrix properties affect bioaccessibility of encapsulated bioactive compounds. Crit Rev Food Sci Nutr 2023; 64:8091-8113. [PMID: 37021463 DOI: 10.1080/10408398.2023.2195519] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Food nanoemulsions are known as very effective and excellent carriers for both lipophilic and hydrophilic bioactive compounds (BCs) and have been successfully used for controlled delivery and protection of BCs during gastrointestinal digestion (GID). However, due to sensitive and fragile morphology, BCs-loaded nanoemulsions have different digestion pathways depending on their properties, food matrix properties, and applied models for testing their digestibility and BCs bioaccessibility. Thus, this review gives a critical review of the behavior of encapsulated BCs into food nanoemulsions during each phase of GID in different static and dynamic in vitro digestion models, as well as of the influence of nanoemulsion and food matrix properties on BCs bioaccessibility. In the last section, the toxicity and safety of BCs-loaded nanoemulsions evaluated on in vitro and in vivo GID models have also been discussed. Better knowledge of food nanoemulsions' behavior in different models of simulated GI conditions and within different nanoemulsion and food matrix types can help to standardize the protocol for their testing aiming for researchers to compare results and design BCs-loaded nanoemulsions with better performance and higher targeted BCs bioaccessibility.
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Affiliation(s)
- Danijel D Milinčić
- Faculty of Agriculture, Institute of Food Technology and Biochemistry, University of Belgrade, Belgrade, Serbia
| | - Ana S Salević-Jelić
- Faculty of Agriculture, Institute of Food Technology and Biochemistry, University of Belgrade, Belgrade, Serbia
| | - Aleksandar Ž Kostić
- Faculty of Agriculture, Institute of Food Technology and Biochemistry, University of Belgrade, Belgrade, Serbia
| | - Slađana P Stanojević
- Faculty of Agriculture, Institute of Food Technology and Biochemistry, University of Belgrade, Belgrade, Serbia
| | - Viktor Nedović
- Faculty of Agriculture, Institute of Food Technology and Biochemistry, University of Belgrade, Belgrade, Serbia
| | - Mirjana B Pešić
- Faculty of Agriculture, Institute of Food Technology and Biochemistry, University of Belgrade, Belgrade, Serbia
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5
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Mondal S, Sirvi A, Jadhav K, Sangamwar AT. Supersaturating lipid-based solid dispersion of atazanavir provides enhanced solubilization and supersaturation in the digestive aqueous phase. Int J Pharm 2023; 638:122919. [PMID: 37011828 DOI: 10.1016/j.ijpharm.2023.122919] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/23/2023] [Accepted: 03/31/2023] [Indexed: 04/04/2023]
Abstract
Understanding and controlling the drug solubilization in digestive environment is of great importance in the design of lipid based solid dispersion (LBSD) for oral delivery of poorly aqueous soluble drugs. In the current study we determined the extent of drug solubilization and supersaturation of supersaturating lipid based solid dispersion which is governed by formulation variables like drug payload, lipid composition, solid carrier properties and lipid to solid carrier ratio. Initially, the impact of lipid chain length and drug payload on drug solubilization in lipid preconcentrate and dispersibility were evaluated to design liquid LbF of the model antiretroviral drug, atazanavir. The temperature induced supersaturation method enhanced the drug payload in medium chain triglyceride formulation at 60 °C. Further, the selected liquid supersaturated LbF was transformed into solid state LbF by employing different solid carriers including silica (Neusilin® US2 and Aerosil® 200), clay (Montmorillonite and Bentonite) and polymer (HPMC-AS and Kollidon® CL-M). The fabricated LBSDs were evaluated for solid state characterization to identify the physical nature of drug. In vitro digestion studies were conducted using pH-stat lipolysis method to assess the supersaturation propensity in aqueous digestive phase. Results revealed that LBSDs with silica and polymer carriers showed maximum drug solubilization throughout experiment compared to liquid LbF. The ionic interaction between drug-clay particles significantly reduced the ATZ partitioning from clay based LBSDs. LBSDs with dual purpose solid carrier like HPMC-AS and Neusilin® US2 offers the potential to improve drug solubilization of ATZ for physiologically relevant time. Lastly, we conclude that evaluation of formulation variables is crucial to achieve optimal performance of supersaturating LBSD.
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6
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Guo S, Ma C, Hu Y, Song Z, Wang T, Yang R. A notable impact of lipid matrices on cholesterol bioaccessibility from phytosterols-loaded nanostructured lipid carriers during in vitro intestinal digestion. FOOD BIOSCI 2023. [DOI: 10.1016/j.fbio.2023.102500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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7
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Liu Y, Liu Y. Construction of lipid-biomacromolecular compounds for loading and delivery of carotenoids: Preparation methods, structural properties, and absorption-enhancing mechanisms. Crit Rev Food Sci Nutr 2022; 64:1653-1676. [PMID: 36062817 DOI: 10.1080/10408398.2022.2118229] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Due to the unstable chemical properties and poor water solubility of carotenoids, their processing adaptation and oral bioavailability are poor, limiting their application in hydrophilic food systems. Lipid-biomacromolecular compounds can be excellent carriers for carotenoid delivery by taking full advantage of the solubilization of lipids to non-polar nutrients and the water dispersion and gastrointestinal controlled release properties of biomacromolecules. This paper reviewed the research progress of lipid-biomacromolecular compounds as encapsulation and delivery carriers of carotenoids and summarized the material selection and preparation methods for biomacromolecular compounds. By considering the interaction between the two, this paper briefly discussed the effect of these compounds on carotenoid water solubility, stability, and bioavailability, emphasizing their delivery effect on carotenoids. Finally, various challenges and future trends of lipid-biomacromolecular compounds as carotenoid delivery carriers were discussed, providing new insight into efficient loading and delivery of carotenoids.
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Affiliation(s)
- Yunjun Liu
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, Fujian, People's Republic of China
| | - Yixiang Liu
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, Fujian, People's Republic of China
- Collaborative Innovation Center of Provincial and Ministerial Co-construction for Marine Food Deep Processing, Dalian Polytechnic University, Dalian, China
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8
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Tunçer E, Bayramoğlu B. Molecular dynamics simulations of duodenal self assembly in the presence of different fatty acids. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128866] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Zöller K, To D, Knoll P, Bernkop-Schnürch A. Digestion of lipid excipients and lipid-based nanocarriers by pancreatic lipase and pancreatin. Eur J Pharm Biopharm 2022; 176:32-42. [PMID: 35584719 DOI: 10.1016/j.ejpb.2022.05.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 04/27/2022] [Accepted: 05/02/2022] [Indexed: 11/16/2022]
Abstract
The digestion behaviour of lipid-based nanocarriers (LNC) has a great impact on their oral drug delivery properties. In this study, various excipients including surfactants, glycerides and waxes, as well as various drug-delivery systems, namely self-emulsifying drug delivery systems (SEDDS), solid lipid nanoparticles (SLN) and nanostructured lipid carriers (NLC) were examined via the pH-stat lipolysis model. Lipolysis experiments with lipase and pancreatin revealed the highest release of fatty acids for medium chain glycerides, followed by long chain glycerides and surfactants. Waxes appeared to be poor substrates with a maximum digestion of up to 10% within 60 min. Within the group of surfactants, the enzymatic cleavage decreased in the following order: glycerol monostearate > polyoxyethylene (20) sorbitan monostearate > PEG-35 castor oil > sorbitan monostearate. After digestion experiments of the excipients, SEDDS, SLN and NLC with sizes between 30 and 300 nm were prepared. The size of almost all formulations was increasing during lipolysis and levelled off after approximately 15 min except for the SLN and NLC consisting of cetyl palmitate. SEDDS exceeded 6000 nm after some minutes and were almost completely hydrolysed by pancreatin. No significant difference was observed between comparable SLN and NLC but surfactant choice and selection of the lipid component had an impact on digestion. SLN and NLC with cetyl palmitate were only digested by 5% whereas particles with glyceryl distearate were decomposed by 40-80% within 60 min. Additionally, the digestion of the same SLN or NLC, only differing in the surfactant, was higher for SLN/NLC containing polyoxyethylene (20) sorbitan monostearate than PEG-35 castor oil. This observation might be explained by the higher PEG content of PEG-35 castor oil causing a more pronounced steric hindrance for the access of lipase. Generally, digestion experiments performed with pancreatin resulted in a higher digestion compared to lipase. According to these results, the digestion behaviour of LNC depends on both, the type of nanocarrier and on the excipients used for them.
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Affiliation(s)
- Katrin Zöller
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, Leopold-Franzens-University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Dennis To
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, Leopold-Franzens-University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Patrick Knoll
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, Leopold-Franzens-University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Andreas Bernkop-Schnürch
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, Leopold-Franzens-University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria.
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10
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Zhang L, Wahlgren M, Bergenståhl B. Oil-Based Delivery Control Release System Targeted to the Later Part of the Gastrointestinal Tract-A Mechanistic Study. Pharmaceutics 2022; 14:pharmaceutics14050896. [PMID: 35631482 PMCID: PMC9144740 DOI: 10.3390/pharmaceutics14050896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/07/2022] [Accepted: 04/18/2022] [Indexed: 02/01/2023] Open
Abstract
Oil-based drug delivery systems have been studied in different aspects. The present study proposes a new application for an oil-based delivery system, focusing on controlled release until the drug reaches the later part of the small intestine. Bulk surfactants and interfacial surfactants were added into the oil formulation to provide a better mechanistic understating of the lipolysis. Validation of the modified in vitro method shows the overall conversion from medium-chain triglyceride oil (MCT oil) to free fatty acids (FFA) of 100 ± 4% in five replicates. This fully converted level and high reproducibility are fundamental for the following investigations where any retarding effect can be distinguished from the experimental errors. The results show that viscosity and thermodynamic activity have limited retardation. Furthermore, the former may change the kinetics of lipolysis, while the latter changes the equilibrium level. The gel-forming retarder (ethylcellulose) displayed a strong effect. Whereas the lipolysis was significantly retarded (>50%) when the retarders altered the interfacial composition (poloxamer 407), degradable interfacial surfactants did not have the same effect. However, surface-active, lipolysis-resistant retarders with a high CMC did not show a retarding effect.
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11
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Luo H, Li Z, Yao M, McClements DJ, Xiao H. Impact of excipient emulsions made from different types of oils on the bioavailability and metabolism of curcumin in gastrointestinal tract. Food Chem 2022; 370:130980. [PMID: 34628238 DOI: 10.1016/j.foodchem.2021.130980] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 08/10/2021] [Accepted: 08/27/2021] [Indexed: 11/18/2022]
Abstract
Low bioavailability currently limits the potential of curcumin as a health-promoting dietary compound. This study therefore explored the potential of excipient emulsions to improve curcumin bioavailability. Oil-in-water excipient emulsions were prepared using different types of oils: corn oil, olive oil, and medium chain triglycerides (MCT). The excipient emulsions increased the transportation rate of curcumin across the Caco-2 cell monolayer and showed ability to protect curcumin from metabolism in the enterocytes, with the olive oil-based systems exhibiting the highest efficacy. In addition, most of curcumin metabolites were present as hexahydro-curcumin (HHC) and its conjugates. Our results show that excipient emulsions can improve curcumin bioavailability by increasing its trans-enterocyte absorption and reducing cellular metabolism. Moreover, they show that these effects depend on the type of oil used to produce them. These findings have important implications for the rational design of lipid-based delivery systems to enhance the bioavailability of hydrophobic nutraceuticals like curcumin.
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Affiliation(s)
- Haiyan Luo
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, United States
| | - Zhengze Li
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, United States
| | - Mingfei Yao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China
| | | | - Hang Xiao
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, United States.
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12
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Impact of pasteurization on the self-assembly of human milk lipids during digestion. J Lipid Res 2022; 63:100183. [PMID: 35181315 PMCID: PMC9065913 DOI: 10.1016/j.jlr.2022.100183] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 02/09/2022] [Accepted: 02/14/2022] [Indexed: 11/21/2022] Open
Abstract
Human milk is critical for the survival and development of infants. This source of nutrition contains components that protect against infections while stimulating immune maturation. In cases where the mother's own milk is unavailable, pasteurized donor milk is the preferred option. Although pasteurization has been shown to have minimal impact on the lipid and FA composition before digestion, no correlation has been made between the impact of pasteurization on the FFA composition and the self-assembly of lipids during digestion, which could act as delivery mechanisms for poorly water-soluble components. Pooled nonpasteurized and pasteurized human milk from a single donor was used in this study. The evolving FFA composition during digestion was determined using GC coupled to a flame ionization detector. In vitro digestion coupled to small-angle X-ray scattering was utilized to investigate the influence of different calcium levels, fat content, and the presence of bile salts on the extent of digestion and structural behavior of human milk lipids. Almost complete digestion was achieved when bile salts were added to the systems containing high calcium to milk fat ratio, with similar structural behavior of lipids during digestion of both types of human milk being apparent. In contrast, differences in the colloidal structures were formed during digestion in the absence of bile salt because of a greater amount of FFAs being released from the nonpasteurized than pasteurized milks. This difference in FFAs released from both types of human milk could result in varying nutritional implications for infants.
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Feng W, Qin C, Cipolla E, Lee JB, Zgair A, Chu Y, Ortori CA, Stocks MJ, Constantinescu CS, Barrett DA, Fischer PM, Gershkovich P. Inclusion of Medium-Chain Triglyceride in Lipid-Based Formulation of Cannabidiol Facilitates Micellar Solubilization In Vitro, but In Vivo Performance Remains Superior with Pure Sesame Oil Vehicle. Pharmaceutics 2021; 13:1349. [PMID: 34575426 PMCID: PMC8472830 DOI: 10.3390/pharmaceutics13091349] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/21/2021] [Accepted: 08/24/2021] [Indexed: 12/13/2022] Open
Abstract
Oral sesame oil-based formulation facilitates the delivery of poorly water-soluble drug cannabidiol (CBD) to the lymphatic system and blood circulation. However, this natural oil-based formulation also leads to considerable variability in absorption of CBD. In this work, the performance of lipid-based formulations with the addition of medium-chain triglyceride (MCT) or surfactants to the sesame oil vehicle has been tested in vitro and in vivo using CBD as a model drug. The in vitro lipolysis has shown that addition of the MCT leads to a higher distribution of CBD into the micellar phase. Further addition of surfactants to MCT-containing formulations did not improve distribution of the drug into the micellar phase. In vivo, formulations containing MCT led to lower or similar concentrations of CBD in serum, lymph and MLNs, but with reduced variability. MCT improves the emulsification and micellar solubilization of CBD, but surfactants did not facilitate further the rate and extent of lipolysis. Even though addition of MCT reduces the variability, the in vivo performance for the extent of both lymphatic transport and systemic bioavailability remains superior with a pure natural oil vehicle.
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Affiliation(s)
- Wanshan Feng
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Chaolong Qin
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Elena Cipolla
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
- School of Pharmacy, Universita di Roma Tor Vergata, 00173 Rome, Italy
| | - Jong Bong Lee
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Atheer Zgair
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
- College of Pharmacy, University of Anbar, Ramadi 31001, Iraq
| | - Yenju Chu
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
- Tri-Service General Hospital, Medical Supplies and Maintenance Office, National Defense Medical Center, Taipei 114202, Taiwan
| | - Catherine A. Ortori
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Michael J. Stocks
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | | | - David A. Barrett
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Peter M. Fischer
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
| | - Pavel Gershkovich
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK; (W.F.); (C.Q.); (E.C.); (J.B.L.); (A.Z.); (Y.C.); (C.A.O.); (M.J.S.); (D.A.B.); (P.M.F.)
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Jimenez-Moya B, Martin D, Soler-Rivas C, Barroeta AC, Tres A, Sala R. Acid versus crude oils for broiler chicken diets: In vitro lipid digestion and bioaccessibility. Anim Feed Sci Technol 2021. [DOI: 10.1016/j.anifeedsci.2021.114926] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Mechanisms of drug solubilization by polar lipids in biorelevant media. Eur J Pharm Sci 2021; 159:105733. [PMID: 33497822 DOI: 10.1016/j.ejps.2021.105733] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 12/16/2020] [Accepted: 01/19/2021] [Indexed: 01/23/2023]
Abstract
Despite the widespread use of lipid excipients in both academic research and oral formulation development, rational selection guidelines are still missing. In the current study, we aimed to establish a link between the molecular structure of commonly used polar lipids and drug solubilization in biorelevant media. The solubilization of fenofibrate by 13 phospholipids, 11 fatty acids and 2 monoglycerides was studied by an in vitro model of the upper GI tract. The main trends were verified with progesterone and danazol. It was revealed that to alter drug solubilization in biorelevant media, the polar lipids must form mixed colloidal aggregates with the bile. Such aggregates are formed when: (1) the polar lipid is used at a sufficiently high concentration (relative to its mixed critical micellar concentration) and (2) its hydrophobic chain has a melting temperature (Tm) < 37 °C. When these two conditions are met, the increased polar lipid chain length increases the drug solubilization capacity. Hence, long chain (C18) unsaturated polar lipids show best drug solubilization, due to the combination of long chain length and low Tm. Polar lipids with Tm significantly higher than 37 °C (e.g. C16 and C18 saturated compounds) do not impact drug solubilization in biorelevant media, due to limited association in mixed colloidal aggregates. The hydrophilic head group also has a dramatic impact on the drug solubilization enhancement, with polar lipids performance decreasing in the order [choline phospholipids] > [monoglycerides] > [fatty acids]. As both the acyl chain and head group types are structural features of the polar lipids, and not of the solubilized drugs, the described trends in drug solubilization should hold true for a variety of hydrophobic molecules.
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16
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Chen XL, Liang XL, Zhao GW, Zeng QY, Dong W, Ou LQ, Zhang HN, Jiang QY, Liao ZG. Improvement of the bioavailability of curcumin by a supersaturatable self nanoemulsifying drug delivery system with incorporation of a hydrophilic polymer: in vitro and in vivo characterisation. J Pharm Pharmacol 2021; 73:641-652. [PMID: 33772289 DOI: 10.1093/jpp/rgaa073] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 01/04/2021] [Indexed: 12/12/2022]
Abstract
OBJECTIVES The current study was focused on preparing curcumin (CUR) supersaturated self-nano-emulsion (PI-CUR-SNEDDS) using hydrophilic polymer and to study the influence of polymer precipitation inhibitor on the physicochemical and biopharmaceutical properties of the PI-CUR-SNEDDS. METHODS PI-CUR-SNEDDS were prepared using hydrophilic polymer in order to maintain the supersaturation of CUR in nano-emulsion solution, artificial gastrointestinal fluid (AGF), and the precipitates formed, and characterised by in vitro dispersion tests, in vitro intestinal absorption and in vivo pharmacokinetic and compared with CUR-SNEDDS. KEY FINDINGS PI-CUR-SNEDDS prepared with 2% hydroxypropyl methylcellulose 55-60 (HPMC55-60) as precipitation inhibitor (PI) significantly improved the viscosity, physical stability and CUR's equilibrium solubility of nanoemulsion. HPMC55-60 and CUR interact in AGF through intermolecular interactions, form hydrogen bonds, and produce amorphous precipitates. Compared with CUR-SNEDDS, the proportion of CUR in the hydrophilic phase increased by about 3-fold, and apparent permeability coefficient (Papp) in duodenum, jejunum, ileum, and colon increased by 2.30, 3.65, 1.54 and 2.08-fold, respectively, and the area under the plasma concentration-time curve0-12h of PI-CUR-SNEDDS also increased by 3.50-fold. CONCLUSIONS Our results suggested that HPMC55-60 maintained the CUR supersaturation state by forming hydrogen bonds with CUR, increasing the solution's viscosity and drug solubilisation, thus improving the absorption and bioavailability of CUR.
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Affiliation(s)
- Xu-Long Chen
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Xin-Li Liang
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Guo-Wei Zhao
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Qing-Yun Zeng
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Wei Dong
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Li-Quan Ou
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Hao-Nan Zhang
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Qie-Ying Jiang
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Zheng-Gen Liao
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
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Verma R, Kaushik D. Role of Biorelevant Media in the Estimation of In Vitro Lipolysis and Food Impact on Self-emulsifying Drug Delivery Systems. CURRENT DRUG THERAPY 2021. [DOI: 10.2174/1574885515999200727121540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Self-emulsifying drug delivery systems (SEDDS) include self-microemulsifying drug
delivery system (SMEDDS) and self-nanoemulsifying drug delivery system (SNEDDS) whose
major benefits are reduction of inter/intrasubject variability and food effect that results in a better
pharmacological response of the drug. Oral intake of these formulations triggers the digestion process
because of pancreatic lipase which emulsifies/digests the lipidic ingredients of the formulation
leading to precipitation of the drug. As a tool to foresee in vivo medicament precipitation, in vitro
lipolysis models are established. Biorelevant media play an important role to study the effect of in
vitro lipolysis and food impact on the bioavailability of SEDDS formulations. It is vital to generate
the composition of fluids for both fed and fasting conditions of gastric, small intestine and colon to
investigate the impact of in vitro lipolysis and food on drug’s release behavior from the formulation.
Fed/Fasted state simulated gastric fluid (Fe/FaSSGF), and Fed/Fasted state simulated gastric
fluid (Fe/FaSSIF) (Phosphate buffers) are first-generation. While Fa/FeSSIF-V2 (maleate) are second-
generation biorelevant media utilized for these studies. FaSSIF-V3 belongs to the thirdgeneration
which differs from other generations in the composition and source of bile salts. With
updates in physiological data, it is vital to incorporate changes in dissolution media composition to
make it more biorelevant. This review paper mainly emphasized the compositions of biorelevant
media of gastric and small intestine for both fed and fasting conditions. Besides, applications of
biorelevant media to investigate the effect of in vitro lipolysis and food on SEDDS are discussed
with some recent research reports.
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Affiliation(s)
- Ravinder Verma
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak,India
| | - Deepak Kaushik
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak,India
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18
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Qiao X, Yang L, Hu X, Cao Y, Li Z, Xu J, Xue C. Characterization and evaluation of inclusion complexes between astaxanthin esters with different molecular structures and hydroxypropyl-β-cyclodextrin. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106208] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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19
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Buya AB, Beloqui A, Memvanga PB, Préat V. Self-Nano-Emulsifying Drug-Delivery Systems: From the Development to the Current Applications and Challenges in Oral Drug Delivery. Pharmaceutics 2020; 12:E1194. [PMID: 33317067 PMCID: PMC7764143 DOI: 10.3390/pharmaceutics12121194] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/04/2020] [Accepted: 12/05/2020] [Indexed: 12/31/2022] Open
Abstract
Approximately one third of newly discovered drug molecules show insufficient water solubility and therefore low oral bio-availability. Self-nano-emulsifying drug-delivery systems (SNEDDSs) are one of the emerging strategies developed to tackle the issues associated with their oral delivery. SNEDDSs are composed of an oil phase, surfactant, and cosurfactant or cosolvent. SNEDDSs characteristics, their ability to dissolve a drug, and in vivo considerations are determinant factors in the choice of SNEDDSs excipients. A SNEDDS formulation can be optimized through phase diagram approach or statistical design of experiments. The characterization of SNEDDSs includes multiple orthogonal methods required to fully control SNEDDS manufacture, stability, and biological fate. Encapsulating a drug in SNEDDSs can lead to increased solubilization, stability in the gastro-intestinal tract, and absorption, resulting in enhanced bio-availability. The transformation of liquid SNEDDSs into solid dosage forms has been shown to increase the stability and patient compliance. Supersaturated, mucus-permeating, and targeted SNEDDSs can be developed to increase efficacy and patient compliance. Self-emulsification approach has been successful in oral drug delivery. The present review gives an insight of SNEDDSs for the oral administration of both lipophilic and hydrophilic compounds from the experimental bench to marketed products.
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Affiliation(s)
- Aristote B. Buya
- Advanced Drug Delivery and Biomaterials, Louvain Drug Research Institute, Université Catholique de Louvain, Avenue Mounier 73, B1.73.12, 1200 Brussels, Belgium; (A.B.B.); (A.B.)
- Pharmaceutics and Phytopharmaceutical Drug Development Research Group, Faculty of Pharmaceutical Sciences, University of Kinshasa, Kinshasa XI BP 212, Democratic Republic of the Congo;
| | - Ana Beloqui
- Advanced Drug Delivery and Biomaterials, Louvain Drug Research Institute, Université Catholique de Louvain, Avenue Mounier 73, B1.73.12, 1200 Brussels, Belgium; (A.B.B.); (A.B.)
| | - Patrick B. Memvanga
- Pharmaceutics and Phytopharmaceutical Drug Development Research Group, Faculty of Pharmaceutical Sciences, University of Kinshasa, Kinshasa XI BP 212, Democratic Republic of the Congo;
| | - Véronique Préat
- Advanced Drug Delivery and Biomaterials, Louvain Drug Research Institute, Université Catholique de Louvain, Avenue Mounier 73, B1.73.12, 1200 Brussels, Belgium; (A.B.B.); (A.B.)
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20
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Bennett-Lenane H, Koehl NJ, O'Dwyer PJ, Box KJ, O'Shea JP, Griffin BT. Applying Computational Predictions of Biorelevant Solubility Ratio Upon Self-Emulsifying Lipid-Based Formulations Dispersion to Predict Dose Number. J Pharm Sci 2020; 110:164-175. [PMID: 33144233 DOI: 10.1016/j.xphs.2020.10.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 10/19/2020] [Accepted: 10/28/2020] [Indexed: 11/26/2022]
Abstract
Computational approaches are increasingly utilised in development of bio-enabling formulations, including self-emulsifying drug delivery systems (SEDDS), facilitating early indicators of success. This study investigated if in silico predictions of drug solubility gain i.e. solubility ratios (SR), after dispersion of a SEDDS in biorelevant media could be predicted from drug properties. Apparent solubility upon dispersion of two SEDDS in FaSSIF was measured for 30 structurally diverse poorly water soluble drugs. Increased drug solubility upon SEDDS dispersion was observed in all cases, with higher SRs observed for cationic and neutral versus anionic drugs at pH 6.5. Molecular descriptors and solid-state properties were used as inputs during partial least squares (PLS) modelling resulting in predictive models for SRMC (r2 = 0.81) and SRLC (r2 = 0.77). Multiple linear regression (MLR) facilitated generation of simplified SR equations with high predictivity (SRMC r2 = 0.74; SRLC r2 = 0.69), requiring only three drug properties; partition coefficient at pH 6.5 (logD6.5), melting point (Tm) and aromatic bonds as fraction of total bonds (F-AromB). Through using the equations to inform developability classification system (DCS) classes for drugs that have already been licensed as lipid-based formulations, merits for development with SEDDS was predicted for 2/3 drugs.
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Affiliation(s)
| | - Niklas J Koehl
- School of Pharmacy, University College Cork, Cork, Ireland
| | - Patrick J O'Dwyer
- School of Pharmacy, University College Cork, Cork, Ireland; Pion Inc. (UK) Ltd, Forest Row, East Sussex, UK
| | - Karl J Box
- Pion Inc. (UK) Ltd, Forest Row, East Sussex, UK
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21
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Zornjak J, Liu J, Esker A, Lin T, Fernández-Fraguas C. Bulk and interfacial interactions between hydroxypropyl-cellulose and bile salts: Impact on the digestion of emulsified lipids. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.105867] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Zhao C, Wei L, Yin B, Liu F, Li J, Liu X, Wang J, Wang Y. Encapsulation of lycopene within oil-in-water nanoemulsions using lactoferrin: Impact of carrier oils on physicochemical stability and bioaccessibility. Int J Biol Macromol 2020; 153:912-920. [DOI: 10.1016/j.ijbiomac.2020.03.063] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 03/07/2020] [Accepted: 03/09/2020] [Indexed: 10/24/2022]
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The effect of medium chain and long chain triglycerides incorporated in self-nano emulsifying drug delivery systems on oral absorption of cannabinoids in rats. Int J Pharm 2020; 580:119201. [DOI: 10.1016/j.ijpharm.2020.119201] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 03/03/2020] [Accepted: 03/04/2020] [Indexed: 02/06/2023]
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24
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Tran T, Bønløkke P, Rodríguez-Rodríguez C, Nosrati Z, Esquinas PL, Borkar N, Plum J, Strindberg S, Karagiozov S, Rades T, Müllertz A, Saatchi K, Häfeli UO. Using in vitro lipolysis and SPECT/CT in vivo imaging to understand oral absorption of fenofibrate from lipid-based drug delivery systems. J Control Release 2020; 317:375-384. [DOI: 10.1016/j.jconrel.2019.11.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/17/2019] [Accepted: 11/18/2019] [Indexed: 10/25/2022]
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Bannow J, Yorulmaz Y, Löbmann K, Müllertz A, Rades T. Improving the drug load and in vitro performance of supersaturated self-nanoemulsifying drug delivery systems (super-SNEDDS) using polymeric precipitation inhibitors. Int J Pharm 2019; 575:118960. [PMID: 31846728 DOI: 10.1016/j.ijpharm.2019.118960] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/11/2019] [Accepted: 12/12/2019] [Indexed: 12/23/2022]
Abstract
In this study, the influence of the polymeric precipitation inhibitor (PPI) PVP/VA 64 (polyvinylpyrrolidone-co-vinyl acetate) on the physical stability and in vitro performance of supersaturated self-nanoemulsifying drug delivery systems (super-SNEDDS) containing the model drug simvastatin (SIM) was investigated. A heating-cooling cycle was employed to dissolve (i) the drug in the SNEDDS preconcentrate, generating super-SNEDDS, or (ii) the drug and PPI generating PPI super-SNEDDS, both containing drug loads of 200% and 250% (with regard to the equilibrium solubility of SIM in the blank SNEDDS). PPI super-SNEDDS were prepared at PPI concentrations of 1%, 10% and 20% (w/w), respectively. The formulations were characterized using polarized light microscopy, dynamic light scattering, rheological profiling and dynamic in vitro lipolysis. The physical stability of PPI super-SNEDDS correlated with an increase in viscosity due to the additionally dissolved PVP/VA 64. PPI super-SNEDDS with drug loads of 200% and 250% containing 20% (w/w) PPI showed no drug recrystallization after more than 6 months of storage at room temperature, whereas PPI-free super-SNEDDS (250% drug load) recrystallized within two hours after equilibration to room temperature. All formulations formed nanosized droplets after emulsification in Milli-Q water. The droplet size was not affected by the PPI, but increased slightly with increasing drug load (z-average of 47.3 ± 0.4 nm for SNEDDS with 200% drug load and 55.6 ± 1.3 nm for SNEDDS with 250% drug load). PPI super-SNEDDS with a drug load of 200% containing 20% (w/w) PVP/VA 64 showed an improved performance during dynamic in vitro lipolysis, maintaining a 2.5-fold higher degree of supersaturation after 15 min of digestion compared to PPI-free super-SNEDDS of the same drug load. In conclusion, the study demonstrated the feasibility of stabilizing higher drug loads and improving the in vitro performance of super-SNEDDS by incorporating PVP/VA 64 into the preconcentrate.
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Affiliation(s)
- J Bannow
- University of Copenhagen, Department of Pharmacy, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Y Yorulmaz
- University of Copenhagen, Department of Pharmacy, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - K Löbmann
- University of Copenhagen, Department of Pharmacy, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - A Müllertz
- University of Copenhagen, Department of Pharmacy, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - T Rades
- University of Copenhagen, Department of Pharmacy, Universitetsparken 2, DK-2100 Copenhagen, Denmark; Åbo Akademi University, Faculty of Science and Engineering, Tykistökatu 6A, FI-20521 Turku, Finland.
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Liao H, Gao Y, Lian C, Zhang Y, Wang B, Yang Y, Ye J, Feng Y, Liu Y. Oral absorption and lymphatic transport of baicalein following drug-phospholipid complex incorporation in self-microemulsifying drug delivery systems. Int J Nanomedicine 2019; 14:7291-7306. [PMID: 31564878 PMCID: PMC6735633 DOI: 10.2147/ijn.s214883] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 08/04/2019] [Indexed: 01/14/2023] Open
Abstract
PURPOSE The aims of this study were to prepare a baicalein self-microemulsion with baicalein-phospholipid complex as the intermediate (BAPC-SMEDDS) and to compare its effects with those of conventional baicalein self-microemulsion (CBA-SMEDDS) on baicalein oral absorption and lymphatic transport. METHODS Two SMEDDS were characterized by emulsifying efficiency, droplet size, zeta potential, cloud point, dilution stability, physical stability, and in vitro release and lipolysis. Different formulations of 40 mg/kg baicalein were orally administered to Sprague-Dawley rats to investigate their respective bioavailabilities. The chylomicron flow blocking rat model was used to evaluate their lymphatic transport. RESULTS The droplet sizes of BAPC-SMEDDS and CBA-SMEDDS after 100x dilution were 9.6±0.2 nm and 11.3±0.4 nm, respectively. In vivo experiments indicated that the relative bioavailability of CBA-SMEDDS and BAPC-SMEDDS was 342.5% and 448.7% compared to that of free baicalein (BA). The AUC0-t and Cmax of BAPC-SMEDDS were 1.31 and 1.87 times higher than those of CBA-SMEDDS, respectively. The lymphatic transport study revealed that 81.2% of orally absorbed BA entered the circulation directly through the portal vein, whereas approximately 18.8% was transported into the blood via lymphatic transport. CBA-SMEDDS and BAPC-SMEDDS increased the lymphatic transport ratio of BA from 18.8% to 56.2% and 70.2%, respectively. Therefore, self-microemulsion not only significantly improves oral bioavailability of baicalein, but also increases the proportion lymphatically transported. This is beneficial to the direct interaction of baicalein with relevant immune cells in the lymphatic system and for proper display of its effects. CONCLUSION This study demonstrates the oral absorption and lymphatic transport characteristics of free baicalein and baicalein SMEDDS with different compositions. This is of great significance to studies on lymphatic targeted delivery of natural immunomodulatory compounds.
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Affiliation(s)
- Hengfeng Liao
- State Key Laboratory of Bioactive substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People’s Republic of China
- Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing100050, People’s Republic of China
| | - Yue Gao
- State Key Laboratory of Bioactive substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People’s Republic of China
- Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing100050, People’s Republic of China
| | - Chunfang Lian
- State Key Laboratory of Bioactive substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People’s Republic of China
- Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing100050, People’s Republic of China
| | - Yun Zhang
- State Key Laboratory of Bioactive substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People’s Republic of China
- Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing100050, People’s Republic of China
| | - Bangyuan Wang
- State Key Laboratory of Bioactive substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People’s Republic of China
- Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing100050, People’s Republic of China
| | - Yanfang Yang
- State Key Laboratory of Bioactive substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People’s Republic of China
- Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing100050, People’s Republic of China
| | - Jun Ye
- State Key Laboratory of Bioactive substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People’s Republic of China
- Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing100050, People’s Republic of China
| | - Yu Feng
- State Key Laboratory of Bioactive substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People’s Republic of China
- Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing100050, People’s Republic of China
| | - Yuling Liu
- State Key Laboratory of Bioactive substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People’s Republic of China
- Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing100050, People’s Republic of China
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Michaelsen MH, Siqueira Jørgensen SD, Abdi IM, Wasan KM, Rades T, Müllertz A. Fenofibrate oral absorption from SNEDDS and super-SNEDDS is not significantly affected by lipase inhibition in rats. Eur J Pharm Biopharm 2019; 142:258-264. [DOI: 10.1016/j.ejpb.2019.07.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 07/01/2019] [Accepted: 07/01/2019] [Indexed: 01/09/2023]
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Salim M, Ramirez G, Clulow AJ, Zhang Y, Ristroph KD, Feng J, McManus SA, Hawley A, Prud'homme RK, Boyd BJ. Solid-State Behavior and Solubilization of Flash Nanoprecipitated Clofazimine Particles during the Dispersion and Digestion of Milk-Based Formulations. Mol Pharm 2019; 16:2755-2765. [PMID: 31038976 PMCID: PMC6549212 DOI: 10.1021/acs.molpharmaceut.9b00276] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
![]()
Clofazimine, a drug previously used
to treat leprosy, has recently
been identified as a potential new drug for the treatment for cryptosporidiosis:
a diarrheal disease that contributes to 500 000 infant deaths
a year in developing countries. Rapid dissolution and local availability
of the drug in the small intestine is considered key to the treatment
of the infection. However, the commercially available clofazimine
formulation (Lamprene) is not well-suited to pediatric use, and therefore
reformulation of clofazimine is desirable. Development of clofazimine
nanoparticles through the process of flash nanoprecipitation (FNP)
has been previously shown to provide fast and improved drug dissolution
rates compared to clofazimine crystals and Lamprene. In this study,
we investigate the effects of milk-based formulations (as possible
pediatric-friendly vehicles) on the in vitro solubilization of clofazimine
formulated as either lecithin- or zein/casein-stabilized nanoparticles.
Milk and infant formula were used as the lipid vehicles, and time-resolved
synchrotron X-ray scattering was used to monitor the presence of crystalline
clofazimine in suspension during in vitro lipolysis under intestinal
conditions. The study confirmed faster dissolution of clofazimine
from all the FNP formulations after the digestion of infant formula
was initiated, and a reduced quantity of fat was required to achieve
similar levels of drug solubilization compared to the reference drug
material and the commercial formulation. These attributes highlight
not only the potential benefits of the FNP approach to prepare drug
particles but also the fact that enhanced dissolution rates can be
complemented by considering the amount of co-administered fat in lipid-based
formulations to drive the solubilization of poorly soluble drugs.
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Affiliation(s)
| | | | | | - Yingyue Zhang
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08540 , United States
| | - Kurt D Ristroph
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08540 , United States
| | - Jie Feng
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08540 , United States
| | - Simon A McManus
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08540 , United States
| | - Adrian Hawley
- SAXS/WAXS Beamline, Australian Synchrotron, ANSTO , 800 Blackburn Rd , Clayton , Victoria 3169 , Australia
| | - Robert K Prud'homme
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08540 , United States
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Vithani K, Jannin V, Pouton CW, Boyd BJ. Colloidal aspects of dispersion and digestion of self-dispersing lipid-based formulations for poorly water-soluble drugs. Adv Drug Deliv Rev 2019; 142:16-34. [PMID: 30677448 DOI: 10.1016/j.addr.2019.01.008] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 01/11/2019] [Accepted: 01/18/2019] [Indexed: 01/15/2023]
Abstract
Self-dispersing lipid-based formulations, particularly self-microemulsifying drug delivery systems (SMEDDS) have gained an increased interest in recent times as a means to enhance the oral bioavailability of poorly water-soluble lipophilic drugs. Upon dilution, SMEDDS self-emulsify in an aqueous fluid and usually form a kinetically stable oil-in-water emulsion or in some rare cases a true thermodynamically stable microemulsion. The digestion of the formulation leads to the production of amphiphilic digestion products that interact with endogenous amphiphilic components and form self-assembled colloidal phases in the aqueous environment of the intestine. The formed colloidal phases play a pivotal role in maintaining the lipophilic drug in the solubilised state during gastrointestinal transit prior to absorption. Thus, this review describes the structural characterisation techniques employed for SMEDDS and the recent literature studies that elucidated the colloidal aspects during dispersion and digestion of SMEDDS and solid SMEDDS. Possible future studies are proposed to gain better understanding on the colloidal aspects of SMEDDS and solid SMEDDS.
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30
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Berthelsen R, Klitgaard M, Rades T, Müllertz A. In vitro digestion models to evaluate lipid based drug delivery systems; present status and current trends. Adv Drug Deliv Rev 2019; 142:35-49. [PMID: 31265861 DOI: 10.1016/j.addr.2019.06.010] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 06/07/2019] [Accepted: 06/28/2019] [Indexed: 12/31/2022]
Abstract
During the past two decades, a range of in vitro models simulating the digestion processes occurring in the stomach and small intestine have been developed to characterize lipid based drug delivery systems (LbDDSs). This review describes the presently existing range of in vitro digestion models and their use in the field of oral drug delivery. The models are evaluated in terms of their suitability to assess LbDDSs, and their ability to produce in vitro - in vivo correlations (IVIVCs). While the pH-stat lipolysis model is by far the most commonly utilized in vitro digestion model in relation to characterizing LbDDSs, a series of recent studies have shown a lack of IVIVCs limiting its future use. Presently, no single in vitro digestion model exists which is able to predict the in vivo performance of various LbDDSs. However, recent research has shown the potential of combined digestion-permeation models as well as species specific digestion models.
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Affiliation(s)
- Ragna Berthelsen
- University of Copenhagen, Department of Pharmacy, Universitetsparken 2, 2100 Copenhagen, Denmark.
| | - Mette Klitgaard
- University of Copenhagen, Department of Pharmacy, Universitetsparken 2, 2100 Copenhagen, Denmark.
| | - Thomas Rades
- University of Copenhagen, Department of Pharmacy, Universitetsparken 2, 2100 Copenhagen, Denmark.
| | - Anette Müllertz
- University of Copenhagen, Department of Pharmacy, Universitetsparken 2, 2100 Copenhagen, Denmark.
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31
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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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32
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Joye IJ, Corradini MG, Duizer LM, Bohrer BM, LaPointe G, Farber JM, Spagnuolo PA, Rogers MA. A comprehensive perspective of food nanomaterials. ADVANCES IN FOOD AND NUTRITION RESEARCH 2019; 88:1-45. [PMID: 31151722 DOI: 10.1016/bs.afnr.2019.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nanotechnology is a rapidly developing toolbox that provides solutions to numerous challenges in the food industry and meet public demands for healthier and safer food products. The diversity of nanostructures and their vast, tunable functionality drives their inclusion in food products and packaging materials to improve their nutritional quality through bioactive fortification and probiotics encapsulation, enhance their safety due to their antimicrobial and sensing capabilities and confer novel sensorial properties. In this food nanotechnology state-of-the-art communication, matrix materials with particular focus on food-grade components, existing and novel production techniques, and current and potential applications in the fields of food quality, safety and preservation, nutrient bioaccessibility and digestibility will be detailed. Additionally, a thorough analysis of potential strategies to assess the safety of these novel nanostructures is presented.
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Affiliation(s)
- I J Joye
- Department of Food Science, University of Guelph, Guelph, ON, Canada
| | - M G Corradini
- Arrell Food Institute, University of Guelph, Guelph, ON, Canada
| | - L M Duizer
- Department of Food Science, University of Guelph, Guelph, ON, Canada
| | - B M Bohrer
- Department of Food Science, University of Guelph, Guelph, ON, Canada
| | - G LaPointe
- Department of Food Science, University of Guelph, Guelph, ON, Canada
| | - J M Farber
- Department of Food Science, University of Guelph, Guelph, ON, Canada
| | - P A Spagnuolo
- Department of Food Science, University of Guelph, Guelph, ON, Canada
| | - M A Rogers
- Department of Food Science, University of Guelph, Guelph, ON, Canada.
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33
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Shen P, Zhang R, McClements DJ, Park Y. Nanoemulsion-based delivery systems for testing nutraceutical efficacy using Caenorhabditis elegans: Demonstration of curcumin bioaccumulation and body-fat reduction. Food Res Int 2019; 120:157-166. [PMID: 31000226 DOI: 10.1016/j.foodres.2019.02.036] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/15/2019] [Accepted: 02/19/2019] [Indexed: 11/30/2022]
Abstract
The genome of the nematode Caenorhabditis elegans shares many similarities with that of humans and so it is widely used as a model in pharmaceutical and nutritional studies. C. elegans has a small mouth and therefore very fine lipid particles are required to orally deliver hydrophobic nutraceuticals. In this study, a nanoemulsion-based delivery system was developed to deliver curcumin to C. elegans. Nanoemulsion were fabricated with different mean particle diameters (d32 = 150 nm and 300 nm), lipid types (Medium chain triglyceride, corn, and fish oil), and emulsifier types (Tween 80 and whey protein). The auto-fluorescence intensity of curcumin was used as an indicator of curcumin accumulation in C. elegans. The structure and composition of nanoemulsions had a significant influence on curcumin bioaccumulation in C. elegans. Curcumin bioaccumulation increased with increasing droplet size, was found to be higher in nanoemulsion containing corn oil compared with those containing fish oil or MCT, and was higher for droplets coated by whey protein than by Tween 80. The nematodes treated with curcumin-loaded nanoemulsions showed significantly reduced fat accumulation compared to the control group. This study could provide useful information to widen the application of C. elegans in research involving lipophilic compounds.
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Affiliation(s)
- Peiyi Shen
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Ruojie Zhang
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - David Julian McClements
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003, USA; Laboratory for Environmental Health NanoScience, Center for Nanotechnology and Nanotoxicology, T. H. Chan School of Public Health, Harvard University, 665 Huntington Avenue, Boston, MA 02115, USA.
| | - Yeonhwa Park
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003, USA.
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34
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Lipomatrix: A Novel Ascorbyl Palmitate-Based Lipid Matrix to Enhancing Enteric Absorption of Serenoa Repens Oil. Int J Mol Sci 2019; 20:ijms20030669. [PMID: 30720739 PMCID: PMC6386960 DOI: 10.3390/ijms20030669] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 01/30/2019] [Accepted: 01/31/2019] [Indexed: 01/01/2023] Open
Abstract
The class of lipophilic compounds coming from vegetal source represents a perspective in the adjuvant treatment of several human diseases, despite their poor bioavailability in humans. These compounds are generally soluble in fats and poorly soluble in water. The major reason for the poor bioavailability of lipophilic natural compounds after oral uptake in humans is related to their reduced solubility in enteric water-based fluids, leading to an ineffective contact with absorbing epithelium. The main goal to ensure efficacy of such compounds is then creating technological conditions to deliver them into the first enteric tract as hydro-dispersible forms to maximize epithelial absorption. The present work describes and characterizes a new technological matrix (Lipomatrix, Labomar Research, Istrana, TV, Italy) based on a molten fats core in which Ascorbyl Palmitate is embedded, able to deliver lipophilic compounds in a well-dispersed and emulsified form once exposed to duodenal fluids. Authors describe and quantify Lipomatrix delivery of Serenoa repens oil through an innovative in vitro model of human gastro-enteric digestion, reporting results of its improved bioaccessibility, enteric absorption and efficacy compared with not formulated Serenoa repens oil-containing commercial products using in vitro models of human intestine and prostatic tissue.
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35
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Swarnakar NK, Venkatesan N, Betageri G. Critical In Vitro Characterization Methods of Lipid-Based Formulations for Oral Delivery: a Comprehensive Review. AAPS PharmSciTech 2018; 20:16. [PMID: 30569266 DOI: 10.1208/s12249-018-1239-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/08/2018] [Indexed: 11/30/2022] Open
Abstract
Lipids have been extensively used in formulations to enhance dissolution and bioavailability of poorly water-soluble as well as water-soluble drug molecules. The digestion of lipid-based formulations, in the presence of bile salts, phospholipids, and cholesterol, changes the lipid composition in vivo, resulting in the formation of different colloidal phases in the intestine. Therefore, in vitro characterization and evaluation of such formulations are critical in developing a successful formulation. This review covers comprehensive discussion on in vitro characterization techniques such as solubility, drug entrapment, thermal characterization, dissolution, and digestion of lipid-based formulations.
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36
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Schultz HB, Kovalainen M, Peressin KF, Thomas N, Prestidge CA. Supersaturated Silica-Lipid Hybrid Oral Drug Delivery Systems: Balancing Drug Loading and In Vivo Performance. J Pharmacol Exp Ther 2018; 370:742-750. [DOI: 10.1124/jpet.118.254466] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Accepted: 12/12/2018] [Indexed: 12/16/2022] Open
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37
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Application of in vitro lipolysis for the development of oral self-emulsified delivery system of nimodipine. Int J Pharm 2018; 553:441-453. [PMID: 30385374 DOI: 10.1016/j.ijpharm.2018.10.066] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 10/24/2018] [Accepted: 10/28/2018] [Indexed: 12/25/2022]
Abstract
The objective of the current study was to optimize for the first time the formulation variables of self-emulsified drug delivery system (SEDDS) based on drug solubilization during lipolysis under a biorelevant condition of digestion such as lipase activity, temperature, pH, fed-fasting state, etc. Nimodipine (ND), a BCS class II, was used as a model drug to prepare the SEDDS. Various oils, surfactants, and cosurfactants were screened for their solubilization potential of ND. Area of self-emulsification was identified using various ternary phase diagrams. Box-Behnken design was employed to investigate effects of formulation variables on various dispersion, emulsification, and lipolysis characteristics of SEDDS. Among 26 candidate formulations, highest ND solubility of 12.72%, 11.09% and 11.2% w/w were obtained in peppermint oil as the oily phase, Cremphor EL as the surfactant and PEG400 as the cosurfactant, respectively. Cremphor EL was the most significant factor to decrease SEDDS droplet size to 30.16 nm. On the other hand, increasing the oil concentration was found to significantly increase the polydispersity index up to 0.31. A faster emulsification rate of 3.37%/min was obtained at higher Cremphor El/PEG 400 ratio. Increasing the percentage of lipid components of SEDDS resulted in lower rate of lipolysis with less recovery of ND in aqueous phase. Under fed state, percentage of lipolysis of optimized formulation was less than that observed under fasted state. However, lowest rate and percentage of lipolysis were observed in lipolysis media without phospholipids and bile salts. Hence, this study demonstrated that in vitro lipolysis could be used as a surrogate approach to distinguish effects of formulation variables on fate of SEDDS upon digestion. Further studies are in progress to identify the lipolytic products of the employed excipients by LC-MS/MS.
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38
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Santiago JSJ, Salvia-Trujillo L, Zucca R, Van Loey AM, Grauwet T, Hendrickx ME. In vitro digestibility kinetics of oil-in-water emulsions structured by water-soluble pectin-protein mixtures from vegetable purées. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2018.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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39
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Park S, Mun S, Kim YR. Emulsifier Dependent in vitro Digestion and Bioaccessibility of β-Carotene Loaded in Oil-in-Water Emulsions. FOOD BIOPHYS 2018. [DOI: 10.1007/s11483-018-9520-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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40
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Sassene PJ, Fanø M, Mu H, Rades T, Aquistapace S, Schmitt B, Cruz-Hernandez C, Wooster TJ, Müllertz A. Comparison of lipases for in vitro models of gastric digestion: lipolysis using two infant formulas as model substrates. Food Funct 2018; 7:3989-3998. [PMID: 27711870 DOI: 10.1039/c6fo00158k] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of this study was to find a lipase suitable as a surrogate for Human Gastric Lipase (HGL), since the development of predictive gastrointestinal lipolysis models are hampered by the lack of a lipase with similar digestive properties as HGL. Three potential surrogates for HGL; Rhizopus Oryzae Lipase (ROL), Rabbit Gastric Lipase (RGL) and recombinant HGL (rHGL), were used to catalyze the in vitro digestion of two infant formulas (a medium-chain triacylglyceride enriched formula (MC-IF) and a predominantly long-chain triacylglyceride formula (LC-IF)). Digesta were withdrawn after 0, 5, 15, 30, 60 min of gastric digestion and after 90 or 180 min of intestinal digestion with or without the presence of pancreatic enzymes, respectively. The digesta were analyzed by scanning electron microscopy and gas chromatography to quantify the release of fatty acids (FAs). Digestions of both formulas, catalyzed by ROL, showed that the extent of gastric digestion was higher than expected from previously published in vivo data. ROL was furthermore insensitive to FA chain length and all FAs were released at the same pace. RGL and rHGL favoured the release of MC-FAs in both formulas, but rHGL did also release some LC-FAs during digestion of MC-IF, whereas RGL only released MC-FAs. Digestion of a MC-IF by HGL in vivo showed that MC-FAs are preferentially released, but some LC-FAs are also released. Thus of the tested lipase rHGL replicated the digestive properties of HGL the best and is a suitable surrogate for HGL for use in in vitro gastrointestinal lipolysis models.
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Affiliation(s)
- P J Sassene
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - M Fanø
- Bioneer:Farma, University of Copenhagen, Copenhagen, Denmark
| | - H Mu
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - T Rades
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | | | - B Schmitt
- Nestlé Research Center, Lausanne, Switzerland
| | | | - T J Wooster
- Nestlé Research Center, Lausanne, Switzerland
| | - A Müllertz
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark. and Bioneer:Farma, University of Copenhagen, Copenhagen, Denmark
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41
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Kinetic approach to study the relation between in vitro lipid digestion and carotenoid bioaccessibility in emulsions with different oil unsaturation degree. J Funct Foods 2018. [DOI: 10.1016/j.jff.2017.12.030] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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42
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43
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Meroni E, Raikos V. Physicochemical stability, antioxidant properties and bioaccessibility of β-carotene in orange oil-in-water beverage emulsions: influence of carrier oil types. Food Funct 2018; 9:320-330. [DOI: 10.1039/c7fo01170a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The bioaccessibility of β-carotene in beverage emulsions was enhanced by modifying the lipid composition of the dispersed phase.
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Affiliation(s)
- Erika Meroni
- Human Nutrition Unit
- Department of Food
- Environmental and Nutritional Sciences (DeFENS)
- University of Milan
- 20133 Milan
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44
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Yuan X, Liu X, McClements DJ, Cao Y, Xiao H. Enhancement of phytochemical bioaccessibility from plant-based foods using excipient emulsions: impact of lipid type on carotenoid solubilization from spinach. Food Funct 2018; 9:4352-4365. [DOI: 10.1039/c8fo01118d] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Effects of lipid type in excipient emulsions on the bioaccessibility of carotenoids (lutein and β-carotene) in spinach were studied using a simulated gastrointestinal tract (GIT).
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Affiliation(s)
- Xi Yuan
- Department of Food Science
- College of Food Science
- South China Agricultural University
- China
- Research Centre of Natural Active Compound Engineering Technology of Guangdong Province
| | - Xiaojuan Liu
- Department of Food Science
- College of Food Science
- South China Agricultural University
- China
- Research Centre of Natural Active Compound Engineering Technology of Guangdong Province
| | | | - Yong Cao
- Department of Food Science
- College of Food Science
- South China Agricultural University
- China
- Research Centre of Natural Active Compound Engineering Technology of Guangdong Province
| | - Hang Xiao
- Department of Food Science University of Massachusetts
- Amherst
- USA
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45
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Siqueira Jørgensen SD, Al Sawaf M, Graeser K, Mu H, Müllertz A, Rades T. The ability of two in vitro lipolysis models reflecting the human and rat gastro-intestinal conditions to predict the in vivo performance of SNEDDS dosing regimens. Eur J Pharm Biopharm 2017; 124:116-124. [PMID: 29288805 DOI: 10.1016/j.ejpb.2017.12.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 12/10/2017] [Accepted: 12/27/2017] [Indexed: 12/29/2022]
Abstract
In this work, the influence of drug load and physical state of R3040 in self-nanoemulsifying drug delivery systems (SNEDDS) on R3040 absorption in rats was assessed. Furthermore, an in vitro lipolysis model simulating rat conditions (rat lipolysis model) was compared to a human lipolysis model in regard to the prediction of the in vivo data. The formulations were SNEDDS 80%, containing R3040 at 80% of its equilibrium solubility in SNEDDS (Seq); super-SNEDDS solution with R3040 supersaturated at 200% Seq; super-SNEDDS suspension containing R3040 at 200% Seq; Chasing principle (drug-free SNEDDS followed by R3040 aqueous suspension) and R3040 aqueous suspension. The pharmacokinetic profiles of R3040 in SNEDDS 80% and super-SNEDDS solution 200% were superimposed and higher than for super-SNEDDS suspension 200%, Chasing principle and aqueous suspension. Therefore, dosing R3040 dissolved in SNEDDS increased R3040 absorption irrespective of the drug load. While the human lipolysis model could not predict the rank order of absorption of the formulations, the rat lipolysis model predicted the similar absorption of R3040 in SNEDDS 80% and super-SNEDDS solution 200%. Thus, the rat lipolysis model showed to be an important step towards predictive in vitro models for rat studies.
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Affiliation(s)
| | - Malak Al Sawaf
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Kirsten Graeser
- Roche Pharma Research and Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann - La Roche Ltd, Switzerland
| | - Huiling Mu
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Anette Müllertz
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark.
| | - Thomas Rades
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
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McEvoy CL, Trevaskis NL, Feeney OM, Edwards GA, Perlman ME, Ambler CM, Porter CJH. Correlating in Vitro Solubilization and Supersaturation Profiles with in Vivo Exposure for Lipid Based Formulations of the CETP Inhibitor CP-532,623. Mol Pharm 2017; 14:4525-4538. [PMID: 29076741 DOI: 10.1021/acs.molpharmaceut.7b00660] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Lipid based formulations (LBFs) are a promising formulation strategy for many poorly water-soluble drugs and have been shown previously to enhance the oral exposure of CP-532,623, an oral cholesteryl ester transfer protein inhibitor. In the current study, an in vitro lipid digestion model was used to probe the relationship between drug solubilization and supersaturation on in vitro dispersion and digestion of LBF containing long chain (LC) lipids and drug absorption in vivo. After in vitro digestion of LBF based on LC lipids, the proportion of CP-532,623 maintained in the solubilized state in the aqueous phase of the digest was highest in formulations containing Kolliphor RH 40, and in most cases outperformed equivalent formulations based on MC lipids. Subsequent administration of the LC-LBFs to beagle dogs resulted in reasonable correlation between concentrations of CP-532,623 measured in the aqueous phase of the in vitro digest after 30 min digestion and in vivo exposure (AUC); however, the LC-LBFs required greater in vitro drug solubilization to elicit similar in vivo exposure when compared to previous studies with MC-LBF. Although post digestion solubilization was enhanced in LC-LBF compared to MC-LBF, equilibrium solubility studies of CP-532,623 in the aqueous phase isolated from blank lipid digestion experiments revealed that equilibrium solubility was also higher, and therefore supersaturation lower. A revised correlation based on supersaturation in the digest aqueous phase and drug absorption was therefore generated. A single, linear correlation was evident for both LC- and MC-LBF containing Kolliphor RH 40, but this did not extend to formulations based on other surfactants. The data suggest that solubilization and supersaturation are significant drivers of drug absorption in vivo, and that across formulations with similar formulation composition good correlation is evident between in vitro and in vivo measures. However, across dissimilar formulations, solubilization and supersaturation alone are not sufficient to explain drug exposure and other factors also likely play a role.
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Affiliation(s)
| | | | | | - Glenn A Edwards
- Department of Veterinary Sciences, The University of Melbourne , Werribee, Victoria 3030, Australia
| | - Michael E Perlman
- Pfizer Global Research and Development , Groton, Connecticut 06340, United States
| | - Catherine M Ambler
- Pfizer Global Research and Development , Groton, Connecticut 06340, United States
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Mao L, Wang D, Liu F, Gao Y. Emulsion design for the delivery of β-carotene in complex food systems. Crit Rev Food Sci Nutr 2017; 58:770-784. [PMID: 27645127 DOI: 10.1080/10408398.2016.1223599] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
β-Carotene has been widely investigated both in the industry and academia, due to its unique bioactive attributes as an antioxidant and pro-vitamin A. Many attempts were made to design delivery systems for β-carotene to improve its dispersant state and chemical stability, and finally to enhance the functionality. Different types of oil-in-water emulsions were proved to be effective delivery systems for lipophilic bioactive ingredients, and intensive studies were performed on β-carotene emulsions in the last decade. Emulsions are thermodynamically unstable, and emulsions with intact structures are preferable in delivering β-carotene during processing and storage. β-Carotene in emulsions with smaller particle size has poor stability, and protein-type emulsifiers and additional antioxidants are effective in protecting β-carotene from degradation. Recent development in the design of protein-polyphenol conjugates has provided a novel approach to improve the stability of β-carotene emulsions. When β-carotene is consumed, its bioaccessibility is highly influenced by the digestion of lipids, and β-carotene in smaller oil droplets containing long-chain fatty acids has a higher bioaccessibility. In order to better deliver β-carotene in complex food products, some novel emulsions with tailor-made structures have been developed, e.g., multilayer emulsions, solid lipid particles, Pickering emulsions. This review summarizes the updated understanding of emulsion-based delivery systems for β-carotene, and how emulsions can be better designed to fulfill the benefits of β-carotene in functional foods.
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Affiliation(s)
- Like Mao
- a Beijing Advanced Innovation Center for Food Nutrition and Human Health , Beijing Laboratory for Food Quality and Safety, Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University , Beijing , P.R. China
| | - Di Wang
- a Beijing Advanced Innovation Center for Food Nutrition and Human Health , Beijing Laboratory for Food Quality and Safety, Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University , Beijing , P.R. China
| | - Fuguo Liu
- a Beijing Advanced Innovation Center for Food Nutrition and Human Health , Beijing Laboratory for Food Quality and Safety, Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University , Beijing , P.R. China
| | - Yanxiang Gao
- a Beijing Advanced Innovation Center for Food Nutrition and Human Health , Beijing Laboratory for Food Quality and Safety, Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University , Beijing , P.R. China
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The gut in the beaker: Missing the surfactants? Int J Pharm 2017; 514:73-80. [PMID: 27863685 DOI: 10.1016/j.ijpharm.2016.09.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 08/29/2016] [Accepted: 08/30/2016] [Indexed: 11/22/2022]
Abstract
Gastrointestinal drug administration is the preferred route for the majority of drugs however, the natural physiology and physicochemistry of the gastrointestinal tract is critical to absorption but complex and influenced by factors such as diet or disease. The pharmaceutical sciences drive for product consistency has led to the development of in vitro product performance tests whose utility and interpretation is hindered by the complexity, variability and a lack of understanding. This article explores some of these issues with respect to the drug, formulation and the presence of surfactant excipients and how these interact with the natural bile salt surfactants. Interactions start in the mouth and during swallowing but the stomach and small intestine present the major challenges related to drug dissolution, solubility, the impact of surfactants and supersaturation along with precipitation. The behaviour of lipid based formulations and the influence of surfactant excipients is explored along with the difficulties of translating in vitro results to in vivo performance. Possible future research areas are highlighted with the conclusion that, "a great deal of work using modern methods is still required to clarify the situation".
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Tacrolimus-loaded nanostructured lipid carriers for oral delivery-in vivo bioavailability enhancement. Eur J Pharm Biopharm 2016; 109:149-157. [DOI: 10.1016/j.ejpb.2016.10.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/31/2016] [Accepted: 10/22/2016] [Indexed: 12/19/2022]
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Tran T, Siqueira SDVS, Amenitsch H, Rades T, Müllertz A. Monoacyl phosphatidylcholine inhibits the formation of lipid multilamellar structures during in vitro lipolysis of self-emulsifying drug delivery systems. Eur J Pharm Sci 2016; 108:62-70. [PMID: 27890596 DOI: 10.1016/j.ejps.2016.11.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 11/21/2016] [Accepted: 11/22/2016] [Indexed: 12/16/2022]
Abstract
The colloidal structures formed during lipolysis of self-emulsifying drug delivery systems (SEDDS) might affect the solubilisation and possibly the absorption of drugs. The aim of the current study is to elucidate the structures formed during the in vitro lipolysis of four SEDDS containing medium-chain glycerides and caprylocaproyl polyoxyl-8 glycerides (Labrasol), with or without monoacyl phosphatidylcholine (MAPC). In situ synchrotron small-angle X-ray scattering (SAXS) was combined with ex situ cryogenic transmission electron microscopy (cryo-TEM) and dynamic light scattering (DLS) to elucidate the generated structures. The SAXS scattering curves obtained during the lipolysis of MAPC-free SEDDS containing 43-60% w/w Labrasol displayed a lamellar phase peak at q=2.13nm-1 that increased with Labrasol concentration, suggesting the presence of multilamellar structures (MLS) with a d-spacing of 2.95nm. However, SEDDS containing 20-30% w/w MAPC did not form MLS during the lipolysis. The cryo-TEM and DLS studies showed that MAPC-free SEDDS formed coarse emulsions while MAPC-containing SEDDS formed nanoemulsions during the dispersion in digestion medium. From the first minute and during the entire lipolysis process, SEDDS both with and without MAPC generated uni-, bi-, and oligo-lamellar vesicles. The lipolysis kinetics in the first minutes of the four SEDDS correlated with an increased intensity of the SAXS curves and the rapid transformation from lipid droplets to vesicles observed by cryo-TEM. In conclusion, the study elucidates the structures formed during in vitro lipolysis of SEDDS and the inhibitory effect of MAPC on the formation of MLS.
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Affiliation(s)
- Thuy Tran
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Scheyla D V S Siqueira
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Heinz Amenitsch
- Institute for Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, A-8010 Graz, Austria
| | - Thomas Rades
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Anette Müllertz
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark; Bioneer: FARMA, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.
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