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Shah S, Famta P, Vambhurkar G, Sharma A, Mourya A, Srinivasarao DA, Shinde A, Prasad SB, Pandey G, Madan J, Srivastava S. Exploration of Abiraterone acetate loaded Nanostructured lipid carriers for bioavailability improvement and circumvention of fast-fed variability. Drug Deliv Transl Res 2024:10.1007/s13346-024-01657-z. [PMID: 38995610 DOI: 10.1007/s13346-024-01657-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2024] [Indexed: 07/13/2024]
Abstract
Abiraterone acetate (ABA), a biopharmaceutical class IV drug suffers from solubility and permeability pitfalls resulting in limited oral bioavailability and positive food effect, i.e. multi-fold enhancement in drug absorption in the presence of food. This poses difficulties to physicians towards the estimation of dose and dosage regimen required for efficacious therapy of prostate cancer (PCa). Nanostructured lipid carriers (NLC) have demonstrated tremendous outcomes in enhancing the oral bioavailability of various entities along with food effect attenuation. In this study, Quality by design and multivariate analysis was employed for optimization of ABA loaded NLC (ABA NLC). The optimal size, PDI and zeta potential obtained using QbD were 134.6 nm, 0.163 and -15.7 mV respectively. Ex vivo qualitative and quantitative intestinal permeability studies demonstrated improved traversion of NLC through the intestinal segments. In vitro dissolution profile in biorelevant fast and fed gastric and intestinal media revealed minimal differences for ABA NLC compared to ABA. In vivo pharmacokinetics was performed to decipher the efficacy of ABA NLC in mitigating the food effect of ABA. The studies demonstrated 14.51-fold and 1.94-fold improvement in oral bioavailability during fasted and fed state respectively as compared to free ABA. The absorption mechanism of ABA NLC using chylomicron flow blocking approach conveyed lymphatic uptake as the major mechanism. Cmax fast/fed ratio was 0.9758 whereas, AUC fast/fed ratio was 0.9386, which being nearly equivalent, confirmed the food effect attenuation. Therefore, the results of the study demonstrate optimal pharmacokinetics of ABA NLC and its utility in circumventing the fast fed variability.
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Affiliation(s)
- Saurabh Shah
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Paras Famta
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Ganesh Vambhurkar
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Abhishek Sharma
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Atul Mourya
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Dadi A Srinivasarao
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Akshay Shinde
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Sajja Bhanu Prasad
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Giriraj Pandey
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Jitender Madan
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India
| | - Saurabh Srivastava
- Pharmaceutical Innovation and Translational Research Lab (PITRL), Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, 500037, India.
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2
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Meng S, Zhu N, Han D, Li B, Zhang X, Zhang J, Liu T. Synthesis and Biological Evaluation of Methoxypolyethylene-Glycol-Substituted Abiraterone Derivatives as Potential Antiprostate Cancer Agents. Mol Pharm 2024; 21:3186-3203. [PMID: 38815167 DOI: 10.1021/acs.molpharmaceut.3c01188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
Globally, prostate cancer is the most commonly diagnosed tumor and a cause of death in older men. Abiraterone, an orally administered irreversible CYP17 inhibitor, is employed to treat prostate cancer. However, abiraterone has several clinical limitations, such as poor water solubility, low dissolution rate, low bioavailability, and toxic side effects in the liver and kidney. Therefore, there is a need to identify high-efficiency and low-toxicity water-soluble abiraterone derivatives. In this work, we aimed to design and synthesize a series of abiraterone derivatives by methoxypoly(ethylene glycol) (mPEG) modification. Their antitumor activities and toxicology were analyzed in vitro and in vivo. The most potent compound, 2e, retained the principle of action on the CYP17 enzyme target and significantly improved the abiraterone water solubility, cell permeability, and blood safety. No significant abnormalities were observed in toxicology. mPEG-modification significantly improved abiraterone's antitumor activity and efficiency while reducing the associated toxic effects. The finding will provide a theoretical basis for future clinical application of mPEG-modified abiraterone.
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Affiliation(s)
- Shuai Meng
- Department of Pharmacy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, People's Republic of China
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People's Republic of China
| | - Na Zhu
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People's Republic of China
- Institute of Traditional Chinese Medicine, Tianjin Key Laboratory of Chinese Medicine Pharmacology, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, People's Republic of China
| | - Di Han
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People's Republic of China
- Institute of Traditional Chinese Medicine, Tianjin Key Laboratory of Chinese Medicine Pharmacology, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, People's Republic of China
| | - Bole Li
- Department of Pharmacy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, People's Republic of China
| | - Xiaolong Zhang
- Department of Pharmacy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, People's Republic of China
| | - Jie Zhang
- Department of Pharmacy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, People's Republic of China
| | - Tianjun Liu
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People's Republic of China
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3
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Møller A, Schultz HB, Meola TR, Joyce P, Müllertz A, Prestidge CA. The Influence of Blonanserin Supersaturation in Liquid and Silica Stabilised Self-Nanoemulsifying Drug Delivery Systems on In Vitro Solubilisation. Pharmaceutics 2023; 15:pharmaceutics15010284. [PMID: 36678919 PMCID: PMC9864080 DOI: 10.3390/pharmaceutics15010284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/18/2023] Open
Abstract
Reformulating poorly water-soluble drugs as supersaturated lipid-based formulations achieves higher drug loading and potentially improves solubilisation and bioavailability. However, for the weak base blonanserin, silica solidified supersaturated lipid-based formulations have demonstrated reduced in vitro solubilisation compared to their liquid-state counterparts. Therefore, this study aimed to understand the influence of supersaturated drug load on blonanserin solubilisation from liquid and silica solidified supersaturated self-nanoemulsifying drug delivery systems (super-SNEDDS) during in vitro lipolysis. Stable liquid super-SNEDDS with varying drug loads (90-300% of the equilibrium solubility) were solidified by imbibition into porous silica microparticles (1:1 lipid: silica ratio). In vitro lipolysis revealed greater blonanserin solubilisation from liquid super-SNEDDS compared to solid at equivalent drug saturation levels, owing to strong silica-BLON/lipid interactions, evidenced by a significant decrease in blonanserin solubilisation upon addition of silica to a digesting liquid super-SNEDDS. An increase in solid super-SNEDDS drug loading led to increased solubilisation, owing to the increased drug:silica and drug:lipid ratios. Solidifying SNEDDS with silica enables the fabrication of powdered formulations with higher blonanserin loading and greater stability than liquid super-SNEDDS, however at the expense of drug solubilisation. These competing parameters need careful consideration in designing optimal super-SNEDDS for pre-clinical and clinical application.
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Affiliation(s)
- Amalie Møller
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide, SA 5000, Australia
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
- Future Industries Institute, UniSA STEM, Mawson Lakes Campus, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Hayley B. Schultz
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide, SA 5000, Australia
| | - Tahlia R. Meola
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide, SA 5000, Australia
| | - Paul Joyce
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide, SA 5000, Australia
| | - Anette Müllertz
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
- Bioneer:FARMA, Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Clive A. Prestidge
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide, SA 5000, Australia
- Correspondence: ; Tel.: +61-8-830-22438
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4
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Danielak D, Krejčí T, Beránek J. Increasing the efficacy of abiraterone - from pharmacokinetics, through therapeutic drug monitoring to overcoming food effects with innovative pharmaceutical products. Eur J Pharm Sci 2022; 176:106254. [DOI: 10.1016/j.ejps.2022.106254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/02/2022] [Accepted: 07/02/2022] [Indexed: 11/03/2022]
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5
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Bio-enabling strategies to mitigate the pharmaceutical food effect: a mini review. Int J Pharm 2022; 619:121695. [PMID: 35339633 DOI: 10.1016/j.ijpharm.2022.121695] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 03/02/2022] [Accepted: 03/19/2022] [Indexed: 12/27/2022]
Abstract
The concomitant administration of oral drugs with food can result in significant changes in bioavailability, leading to variable pharmacokinetics and considerable clinical implications, such as over- or under-dosing. Consequently, there is increasing demand for bio-enabling formulation strategies to reduce variability in exposure between the fasted and fed state and/or mitigate the pharmaceutical food effect. The current review critically evaluates technologies that have been implemented to overcome the positive food effects of pharmaceutical drugs, including, lipid-based formulations, nanosized drug preparations, cyclodextrins, amorphisation and solid dispersions, prodrugs and salts. Additionally, improved insight into preclinical models for predicting the food effect is provided. Despite the wealth of research, this review demonstrates that application of optimal formulation strategies to mitigate the positive food effects and the evaluation in preclinical models is not a universal approach, and improved standardisation of models to predict the food effects would be desirable. Ultimately, the successful reformulation of specific drugs to eliminate the food effect provides a panoply of advantages for patients with regard to clinical efficacy and compliance.
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6
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Almasri R, Schultz HB, Møller A, Bremmell KE, Garcia-Bennett A, Joyce P, Prestidge CA. Role of Silica Intrawall Microporosity on Abiraterone Acetate Solubilization and In Vivo Oral Absorption. Mol Pharm 2022; 19:1091-1103. [PMID: 35238208 DOI: 10.1021/acs.molpharmaceut.1c00781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
SBA-15 mesoporous silica (MPS) has been widely used in oral drug delivery; however, it has not been utilized for solidifying lipid-based formulations, and the impact of their characteristic intrawall microporosity remains largely unexplored. Here, we derive the impact of the MPS microporosity on the in vitro solubilization and in vivo oral pharmacokinetics of the prostate cancer drug abiraterone acetate (AbA) when coencapsulated along with medium chain lipids into the pores. AbA in lipid (at 80% equilibrium solubility) was imbibed within a range of MPS particles (with comparable morphology and mesoporous structure but contrasting microporosity ranging from 0-247 m2/g), and their solid-state properties were characterized. Drug solubilization studies during in vitro lipolysis revealed that microporosity was the key factor in facilitating AbA solubilization by increasing the surface area available for drug-lipid diffusion. Interestingly, microporosity hindered hydrolysis of AbA to its active metabolite, abiraterone (Ab), under simulated intestinal conditions. This unique relationship between microporosity and AbA/Ab aqueous solubilization behavior was hypothesized to have significant implications on the subsequent bioavailability of the active metabolite. In vivo oral pharmacokinetics studies in male Sprague-Dawley rats revealed that MPS with moderate microporosity attained the highest relative bioavailability, while poor in vitro-in vivo correlations (IVIVC) existed between in vitro drug solubilization during lipolysis and in vivo AUC. Despite this, a reasonable IVIVC was established between the in vitro solubilization and in vivo Cmax, providing evidence for an association between silica microporosity and oral drug absorption.
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Affiliation(s)
- Ruba Almasri
- UniSA Clinical & Health Science, University of South Australia, Adelaide, South Australia 5000, Australia
| | - Hayley B Schultz
- UniSA Clinical & Health Science, University of South Australia, Adelaide, South Australia 5000, Australia
| | - Amalie Møller
- UniSA Clinical & Health Science, University of South Australia, Adelaide, South Australia 5000, Australia.,Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Kristen E Bremmell
- UniSA Clinical & Health Science, University of South Australia, Adelaide, South Australia 5000, Australia
| | | | - Paul Joyce
- UniSA Clinical & Health Science, University of South Australia, Adelaide, South Australia 5000, Australia
| | - Clive A Prestidge
- UniSA Clinical & Health Science, University of South Australia, Adelaide, South Australia 5000, Australia
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7
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Møller A, Schultz HB, Meola TR, Müllertz A, Prestidge CA. The Influence of Solidification on the in vitro Solubilisation of Blonanserin Loaded Supersaturated Lipid-Based Oral Formulations. Eur J Pharm Sci 2021; 157:105640. [PMID: 33189902 DOI: 10.1016/j.ejps.2020.105640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/12/2020] [Accepted: 11/07/2020] [Indexed: 11/30/2022]
Abstract
Supersaturated silica-lipid hybrids have previously demonstrated improved in vitro solubilisation and in vivo oral bioavailability of poorly water-soluble drugs, however were only fabricated using a single lipid (LFCS type I formulations) and were not compared to their liquid precursors. This study investigated the influence of lipid formulation classification (type I vs. type II vs. type IIIA/SNEDDS) and physical state (liquid LBF vs. solidified with silica) on the in vitro solubilisation of the poorly soluble, weak base, anti-psychotic drug, blonanserin (BLON), from a supersaturated lipid-based formulation (LBF). Stable liquid supersaturated LBF were fabricated using BLON (loaded at 150% of its equilibrium solubility), and solidified through encapsulation within porous silica microparticles at a 1:1 ratio. Their physicochemical properties and in vitro solubilisation during lipolysis were compared. Supersaturated BLON was encapsulated in the non-crystalline form. All supersaturated LBF improved the solubilisation of pure BLON during lipolysis regardless of their lipid formulation type or their physical state (1.7- to 13.4-fold). SNEDDS achieved greater solubilisation than the type II formulations (1.4- to 1.7-fold). Furthermore, the liquid precursors achieved greater solubilisation than the silica solidified formulations (4.5- to 5.7-fold). Additionally, in an attempt to increase BLON solubilisation, a spray-dried SNEDDS and dual-loaded solidified super-SNEDDS solidified with silica pre-loaded with BLON was developed, however did not significantly improve solubilisation. Liquid SNEDDS were identified as the optimal oral supersaturated LBF strategy for BLON based on in vitro lipolysis studies. Solidification of LBF using silica is a viable strategy for improving stability, however for drugs such as BLON, solidification may impede in vitro release and solubilisation.
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Affiliation(s)
- Amalie Møller
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark; UniSA: Clinical & Health Sciences, University of South Australia, Adelaide, South Australia 5000, Australia
| | - Hayley B Schultz
- UniSA: Clinical & Health Sciences, University of South Australia, Adelaide, South Australia 5000, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes Campus, Mawson Lakes 5095, Australia
| | - Tahlia R Meola
- UniSA: Clinical & Health Sciences, University of South Australia, Adelaide, South Australia 5000, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes Campus, Mawson Lakes 5095, Australia
| | - Anette Müllertz
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark; Bioneer:FARMA, Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Clive A Prestidge
- UniSA: Clinical & Health Sciences, University of South Australia, Adelaide, South Australia 5000, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes Campus, Mawson Lakes 5095, Australia.
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8
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Joyce P, Dening TJ, Meola TR, Wignall A, Ulmefors H, Kovalainen M, Prestidge CA. Contrasting Anti-obesity Effects of Smectite Clays and Mesoporous Silica in Sprague-Dawley Rats. ACS APPLIED BIO MATERIALS 2020; 3:7779-7788. [PMID: 35019518 DOI: 10.1021/acsabm.0c00969] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Porous colloids have been shown to exert unique bioactivities for mediating lipid (fat) metabolism and thereby offer significant potential as anti-obesity therapies. In this study, we compare the capacity for two classes of colloids, that is, smectite clays (Laponite XLG, LAP; montmorillonite, MMT) and mesoporous silica (SBA-15 ordered silica; MPS), to impede intestinal lipid hydrolysis and provoke lipid and carbohydrate excretion through adsorption within their particle matrices. A two-stage in vitro gastrointestinal lipolysis model revealed the capacity for both smectite clays and MPS to inhibit the rate and extent of lipase-mediated digestion under simulated fed state conditions. Each system adsorbed more than its own weight of organic media (i.e., lipid and carbohydrates) after 60 min lipolysis, with MMT adsorbing >10% of all available organics through the indiscriminate adsorption of fatty acids and glycerides. When co-administered with a high-fat diet (HFD) to Sprague-Dawley rats, treatment with MMT and MPS significantly reduced normalized rodent weight gain compared to a negative control, validating their potential to restrict energy intake and serve as anti-obesity therapies. However, in vitro-in vivo correlations revealed poor associations between in vitro digestion parameters and normalized weight gain, indicating that additional/alternate anti-obesity mechanisms may exist in vivo, while also highlighting the need for improved in vitro assessment methodologies. Despite this, the current findings emphasize the potential for porous colloids to restrict weight gain and promote anti-obesity effects to subjects exposed to a HFD and should therefore drive the development of next-generation food-grade biomaterials for the treatment and prevention of obesity.
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Affiliation(s)
- Paul Joyce
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide 5000, South Australia, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, South Australia, Australia
| | - Tahnee J Dening
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide 5000, South Australia, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, South Australia, Australia
| | - Tahlia R Meola
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide 5000, South Australia, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, South Australia, Australia
| | - Anthony Wignall
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide 5000, South Australia, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, South Australia, Australia
| | - Hanna Ulmefors
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide 5000, South Australia, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, South Australia, Australia
| | - Miia Kovalainen
- Research Unit of Biomedicine and Biocenter of Oulu, Faculty of Medicine, University of Oulu, P.O. Box 5000, Oulu FI-90014, Finland
| | - Clive A Prestidge
- UniSA Clinical & Health Sciences, University of South Australia, Adelaide 5000, South Australia, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, South Australia, Australia
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9
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Almasri R, Joyce P, Schultz HB, Thomas N, Bremmell KE, Prestidge CA. Porous Nanostructure, Lipid Composition, and Degree of Drug Supersaturation Modulate In Vitro Fenofibrate Solubilization in Silica-Lipid Hybrids. Pharmaceutics 2020; 12:pharmaceutics12070687. [PMID: 32708197 PMCID: PMC7408050 DOI: 10.3390/pharmaceutics12070687] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 01/08/2023] Open
Abstract
The unique nanostructured matrix obtained by silica-lipid hybrids (SLHs) is well known to improve the dissolution, absorption, and bioavailability of poorly water-soluble drugs (PWSDs). The aim of this study was to investigate the impact of: (i) drug load: 3–22.7% w/w, (ii) lipid type: medium-chain triglyceride (Captex 300) and mono and diester of caprylic acid (Capmul PG8), and (iii) silica nanostructure: spray dried fumed silica (FS) and mesoporous silica (MPS), on the in vitro dissolution, solubilization, and solid-state stability of the model drug fenofibrate (FEN). Greater FEN crystallinity was detected at higher drug loads and within the MPS formulations. Furthermore, an increased rate and extent of dissolution was achieved by FS formulations when compared to crystalline FEN (5–10-fold), a commercial product; APO-fenofibrate (2.4–4-fold) and corresponding MPS formulations (2–4-fold). Precipitation of FEN during in vitro lipolysis restricted data interpretation, however a synergistic effect between MPS and Captex 300 in enhancing FEN aqueous solubilization was attained. It was concluded that a balance between in vitro performance and drug loading is key, and the optimum drug load was determined to be between 7–16% w/w, which corresponds to (200–400% equilibrium solubility in lipid Seq). This study provides valuable insight into the impact of key characteristics of SLHs, in constructing optimized solid-state lipid-based formulations for the oral delivery of PWSDs.
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Affiliation(s)
- Ruba Almasri
- UniSA Clinical and Health Sciences, University of South Australia, Adelaide 5000, Australia; (R.A.); (P.J.); (H.B.S.); (N.T.); (K.E.B.)
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, Australia
| | - Paul Joyce
- UniSA Clinical and Health Sciences, University of South Australia, Adelaide 5000, Australia; (R.A.); (P.J.); (H.B.S.); (N.T.); (K.E.B.)
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, Australia
| | - Hayley B. Schultz
- UniSA Clinical and Health Sciences, University of South Australia, Adelaide 5000, Australia; (R.A.); (P.J.); (H.B.S.); (N.T.); (K.E.B.)
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, Australia
| | - Nicky Thomas
- UniSA Clinical and Health Sciences, University of South Australia, Adelaide 5000, Australia; (R.A.); (P.J.); (H.B.S.); (N.T.); (K.E.B.)
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, Australia
| | - Kristen E. Bremmell
- UniSA Clinical and Health Sciences, University of South Australia, Adelaide 5000, Australia; (R.A.); (P.J.); (H.B.S.); (N.T.); (K.E.B.)
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, Australia
| | - Clive A. Prestidge
- UniSA Clinical and Health Sciences, University of South Australia, Adelaide 5000, Australia; (R.A.); (P.J.); (H.B.S.); (N.T.); (K.E.B.)
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Adelaide 5000, Australia
- Correspondence: ; Tel.: +61-8830-22438
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10
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Meola TR, Paxton K, Joyce P, Schultz HB, Prestidge CA. The effect of drug ionization on lipid-based formulations for the oral delivery of anti-psychotics. ADMET AND DMPK 2020; 8:437-451. [PMID: 35300191 PMCID: PMC8915591 DOI: 10.5599/admet.830] [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: 04/21/2020] [Revised: 07/15/2020] [Indexed: 11/18/2022] Open
Abstract
Lipid-based formulations (LBFs) are well-known to improve the oral bioavailability of poorly water-soluble drugs (PWSDs) by presenting the drug to the gastrointestinal environment in a molecularly dispersed state, thus avoiding the rate-limiting dissolution step. Risperidone and lurasidone are antipsychotics drugs which experience erratic and variable absorption, leading to a low oral bioavailability. The aim of this research was to develop and investigate the performance of risperidone and lurasidone when formulated as an emulsion and silica-lipid hybrid (SLH). Lurasidone and risperidone were dissolved in Capmul® MCM at 100% and 80% their equilibrium solubility, respectively, prior to forming a sub-micron emulsion. SLH microparticles were fabricated by spray-drying a silica stabilised sub-micron emulsion to form a solid powder. The performances of the formulations were evaluated in simulated intestinal media under digesting conditions, where the emulsion and SLH provided a 17-fold and 23-fold increase in LUR solubilisation, respectively. However, the performance of RIS was reduced by 2.2-fold when encapsulated within SLH compared to pure drug. Owing to its pKa, RIS adsorbed to the silica and thus, dissolution was significantly hindered. The results reveal that LBFs may not overcome the challenges of all PWSDs and physiochemical properties must be carefully considered when predicting drug performance.
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Affiliation(s)
- Tahlia R Meola
- UniSA: Clinical and Health Sciences, University of South Australia, City West Campus, Adelaide, South Australia 5000, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, University of South Australia, City West Campus, Adelaide, South Australia 5000, Australia
| | - Kara Paxton
- UniSA: Clinical and Health Sciences, University of South Australia, City West Campus, Adelaide, South Australia 5000, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, University of South Australia, City West Campus, Adelaide, South Australia 5000, Australia
| | - Paul Joyce
- UniSA: Clinical and Health Sciences, University of South Australia, City West Campus, Adelaide, South Australia 5000, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, University of South Australia, City West Campus, Adelaide, South Australia 5000, Australia
| | - Hayley B Schultz
- UniSA: Clinical and Health Sciences, University of South Australia, City West Campus, Adelaide, South Australia 5000, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, University of South Australia, City West Campus, Adelaide, South Australia 5000, Australia
| | - Clive A Prestidge
- UniSA: Clinical and Health Sciences, University of South Australia, City West Campus, Adelaide, South Australia 5000, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, University of South Australia, City West Campus, Adelaide, South Australia 5000, Australia
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Schultz HB, Wignall AD, Thomas N, Prestidge CA. Enhancement of abiraterone acetate oral bioavailability by supersaturated-silica lipid hybrids. Int J Pharm 2020; 582:119264. [PMID: 32278053 DOI: 10.1016/j.ijpharm.2020.119264] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/05/2020] [Accepted: 03/23/2020] [Indexed: 12/28/2022]
Abstract
Abiraterone acetate (AbA) has an oral bioavailability of <10% due to its poor water solubility. Here we investigate the performance of silica-lipid hybrids (SLH) and supersaturated SLH (super-SLH) in improving oral bioavailability of AbA. Specifically, we investigate the influence of lipid type and AbA saturation level of the equilibrium solubility in the lipid (Seq), and explore in vitro-in vivo correlation (IVIVC). An oral pharmacokinetic study was conducted in fasted Sprague-Dawley rats. Suspensions of the formulations were administered via oral gavage at an AbA dose of 25 mg/kg. Plasma samples were collected and analyzed for drug content. SLH with a saturation level of 90% Seq enhanced the oral bioavailability of unformulated AbA by 31-fold, and super-SLH with saturation levels of 150, 200 and 250% Seq, enhanced the bioavailability by 11, 10 and 7-fold, respectively. In comparison with the commercial product Zytiga, SLH (90% Seq) increased the oral bioavailability 1.43-fold whereas super-SLH showed no improvement. A reasonable IVIVC existed between the performance of unformulated AbA, SLH and super-SLH, in the in vitro lipolysis and in vivo oral pharmacokinetic studies. SLH and super-SLH significantly enhanced the oral bioavailability of AbA. Additionally, supersaturation of SLH improved drug loading but did not correlate with enhanced AbA bioavailability.
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Affiliation(s)
- Hayley B Schultz
- University of South Australia Cancer Research Institute, Adelaide, South Australia 5000, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes Campus, Mawson Lakes 5095, Australia
| | - Anthony D Wignall
- University of South Australia Cancer Research Institute, Adelaide, South Australia 5000, Australia
| | - Nicky Thomas
- University of South Australia Cancer Research Institute, Adelaide, South Australia 5000, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes Campus, Mawson Lakes 5095, Australia
| | - Clive A Prestidge
- University of South Australia Cancer Research Institute, Adelaide, South Australia 5000, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes Campus, Mawson Lakes 5095, Australia.
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