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Sun Y, Zhou J, Zhang Z, Yu DG, Bligh SWA. Integrated Janus nanofibers enabled by a co-shell solvent for enhancing icariin delivery efficiency. Int J Pharm 2024:124180. [PMID: 38705246 DOI: 10.1016/j.ijpharm.2024.124180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 04/09/2024] [Accepted: 04/28/2024] [Indexed: 05/07/2024]
Abstract
During the past several decades, nanostructures have played their increasing influences on the developments of novel nano drug delivery systems, among which, double-chamber Janus nanostructure is a popular one. In this study, a new tri-channel spinneret was developed, in which two parallel metal capillaries were nested into another metal capillary in a core-shell manner. A tri-fluid electrospinning was conducted with a solvent mixture as the shell working fluid for ensuring the formation of an integrated Janus nanostructure. The scanning electronic microscopic results demonstrated that the resultant nanofibers had a linear morphology and two distinct compartments within them, as indicated by the image of a cross-section. Fourier Transformation Infra-Red spectra and X-Ray Diffraction patterns verified that the loaded poorly water-soluble drug, i.e. icariin, presented in the Janus medicated nanofibers in an amorphous state, which should be attributed to the favorable secondary interactions between icariin and the two soluble polymeric matrices, i.e. hydroxypropyl methyl cellulose (HPMC) and polyvinylpyrrolidone (PVP). The in vitro dissolution tests revealed that icariin, when encapsulated within the Janus nanofibers, exhibited complete release within a duration of 5 min, which was over 11 times faster compared to the raw drug particles. Furthermore, the ex vivo permeation tests demonstrated that the permeation rate of icariin was 16.2 times higher than that of the drug powders. This improvement was attributed to both the rapid dissolution of the drug and the pre-release of the trans-membrane enhancer sodium lauryl sulfate from the PVP side of the nanofibers. Mechanisms for microformation, drug release, and permeation were proposed. Based on the methodologies outlined in this study, numerous novel Janus nanostructure-based nano drug delivery systems can be developed for poorly water-soluble drugs in the future.
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Affiliation(s)
- Yuhao Sun
- Department of Neurosurgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
| | - Jianfeng Zhou
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Zhiyuan Zhang
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Deng-Guang Yu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Sim Wan Annie Bligh
- School of Health Sciences, Saint Francis University, Hong Kong 999077, China.
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2
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Zhuo X, Foderà V, Larsson P, Schaal Z, Bergström CAS, Löbmann K, Kabedev A. Analysis of stabilization mechanisms in β-lactoglobulin-based amorphous solid dispersions by experimental and computational approaches. Eur J Pharm Sci 2024; 192:106639. [PMID: 37967658 DOI: 10.1016/j.ejps.2023.106639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/09/2023] [Accepted: 11/11/2023] [Indexed: 11/17/2023]
Abstract
Our previous work shows that β-lactoglobulin-stabilized amorphous solid dispersion (ASD) loaded with 70 % indomethacin remains stable for more than 12 months. The stability is probably due to hydrogen bond networks spread throughout the ASD, facilitated by the indomethacin which has both hydrogen donors and acceptors. To investigate the stabilization mechanisms further, here we tested five other drug molecules, including two without any hydrogen bond donors. A combination of experimental techniques (differential scanning calorimetry, X-ray power diffraction) and molecular dynamics simulations was used to find the maximum drug loadings for ASDs with furosemide, griseofulvin, ibuprofen, ketoconazole and rifaximin. This approach revealed the underlying stabilization factors and the capacity of computer simulations to predict ASD stability. We searched the ASD models for crystalline patterns, and analyzed diffusivity of the drug molecules and hydrogen bond formation. ASDs loaded with rifaximin and ketoconazole remained stable for at least 12 months, even at 90 % drug loading, whereas stable drug loadings for furosemide, griseofulvin and ibuprofen were at a maximum of 70, 50 and 40 %, respectively. Steric confinement and hydrogen bonding to the proteins were the most important stabilization mechanisms at low drug loadings (≤ 40 %). Inter-drug hydrogen bond networks (including those with induced donors), ionic interactions, and a high Tg of the drug molecule were additional factors stabilizing the ASDs at drug loading greater than 40 %.
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Affiliation(s)
- Xuezhi Zhuo
- Department of Pharmacy, University of Copenhagen, Copenhagen 2100, Denmark
| | - Vito Foderà
- Department of Pharmacy, University of Copenhagen, Copenhagen 2100, Denmark
| | - Per Larsson
- Department of Pharmacy, Uppsala University, Uppsala 75123, Sweden
| | - Zarah Schaal
- Department of Pharmacy, University of Copenhagen, Copenhagen 2100, Denmark
| | | | - Korbinian Löbmann
- Department of Pharmacy, University of Copenhagen, Copenhagen 2100, Denmark; Zerion Pharma A/S, Birkerød 3460, Denmark
| | - Aleksei Kabedev
- Department of Pharmacy, Uppsala University, Uppsala 75123, Sweden.
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3
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Zou Z, Huang Q, Li X, Liu X, Yin L, Zhao Y, Liang G, Wu W. Dissolution changes in drug-amino acid/biotin co-amorphous systems: Decreased/increased dissolution during storage without recrystallization. Eur J Pharm Sci 2023; 188:106526. [PMID: 37442486 DOI: 10.1016/j.ejps.2023.106526] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 06/29/2023] [Accepted: 07/10/2023] [Indexed: 07/15/2023]
Abstract
Co-amorphous systems have been proven to be a promising strategy to address the poor water solubility of poorly water-soluble drugs. Generally, the initial dissolution behaviors after co-amorphous system preparation and the potential recrystallization during storage are used to evaluate the performance of co-amorphous systems. However, this study reveals that decreased dissolution and unexpected increased dissolution were observed during storage though the co-amorphous systems maintained amorphous form. Three drugs (valsartan, tadalafil, mebendazole) and three co-formers (arginine, tryptophan, biotin) were used to prepare co-amorphous systems and the samples were stored for different times. After stored for 80 d, most of the co-amorphous systems maintained amorphous form, however, decreased and increased intrinsic dissolution rates (IDRs) were both observed in these non-recrystallized co-amorphous systems. The moisture changes of the systems during storage and the possible drug-co-former molecular interactions showed no effect on the dissolution changes, while phase separation might play a role in it. In conclusion, more attention should be paid to the dissolution changes of co-amorphous systems during storage. Focusing on the initial dissolution behaviors after sample preparation and the physical recrystallization during storage is not enough for the development of co-amorphous systems in future.
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Affiliation(s)
- Zhiren Zou
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Science, Wenzhou 325024, Zhejiang, China
| | - Qiang Huang
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Science, Wenzhou 325024, Zhejiang, China
| | - Xiaobo Li
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Science, Wenzhou 325024, Zhejiang, China
| | - Xianzhi Liu
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Science, Wenzhou 325024, Zhejiang, China
| | - Lina Yin
- School of Pharmaceutical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310012, China
| | - Yunjie Zhao
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China.
| | - Guang Liang
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Science, Wenzhou 325024, Zhejiang, China; Affiliated Yongkang First People's Hospital and School of Pharmacy, Hangzhou Medical College, Hangzhou 310014, Zhejiang, China.
| | - Wenqi Wu
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Science, Wenzhou 325024, Zhejiang, China.
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4
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Sudaki H, Fujimoto K, Wada K, Sugano K. Phosphate buffer interferes dissolution of prazosin hydrochloride in compendial dissolution testing. Drug Metab Pharmacokinet 2023; 51:100519. [PMID: 37393739 DOI: 10.1016/j.dmpk.2023.100519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 05/27/2023] [Accepted: 06/08/2023] [Indexed: 07/04/2023]
Abstract
The purpose of this study was to elucidate the lack of supersaturation behavior in the dissolution profile of prazosin hydrochloride (PRZ-HCl) in the compendial dissolution test. The equilibrium solubility was measured by a shake-flask method. Dissolution tests were performed by a compendial paddle method with a phosphate buffer solution (pH 6.8, 50 mM phosphate). The solid form of the residual particles was identified by Raman spectroscopy. In the pH range below 6.5, the equilibrium solubility in phosphate buffer was lower than that in the unbuffered solutions (pH adjusted by HCl and NaOH). Raman spectra showed that the residual solid was a phosphate salt of PRZ. In the pH range above 6.5, the pH-solubility profiles in the phosphate buffer solutions and the unbuffered solutions were the same. The residual solid was a PRZ freebase (PRZ-FB). In the dissolution test, PRZ-HCl particles first changed to a phosphate salt within 5 min, then gradually changed to PRZ-FB after several hours. Since the intestinal fluid is buffered by the bicarbonate system in vivo, the dissolution behavior in vivo may not be properly evaluated using a phosphate buffer solution. For drugs with a low phosphate solubility product, it is necessary to consider this aspect.
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Affiliation(s)
- Hiroshi Sudaki
- Nippon Boehringer Ingelheim Co. Ltd., 6-7-5 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.
| | - Katsuyoshi Fujimoto
- Nippon Boehringer Ingelheim Co. Ltd., 6-7-5 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan
| | - Koichi Wada
- Nippon Boehringer Ingelheim Co. Ltd., 6-7-5 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan
| | - Kiyohiko Sugano
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga, 525-8577, Japan
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5
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Huang Q, Zou Z, Li X, Xiao Q, Liang G, Wu W. Poly (amino acid)s as new co-formers in amorphous solid dispersion. Int J Pharm 2023; 634:122645. [PMID: 36706970 DOI: 10.1016/j.ijpharm.2023.122645] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 01/08/2023] [Accepted: 01/21/2023] [Indexed: 01/26/2023]
Abstract
The drug-amino acid co-amorphous systems and amorphous solid dispersions (ASDs) are promising methods to address the poor water solubility of poorly water-soluble drugs. However, some amino acids might not be perfect co-formers for co-amorphous systems, and the relatively low drug-loading of many ASDs is one of the main disadvantages of ASDs. Thus, poly-l-lysine and polyglutamic acid were selected as the co-formers, ball milled with basic mebendazole, neutral tadalafil and acidic valsartan at different weight ratios (from 3:1 to 1:3) to prepare poly (amino acid)-based ASDs, aiming to combine the advantages of co-amorphous systems (high drug-loading) and ASDs (relatively high Tg and high physical stability). All the mixtures were converted into amorphous after milling. The powder dissolution studies showed that drug-poly (amino acid) ASDs improved the dissolution rate of the drug in different ways and to different degrees. Moreover, the two poly (amino acid)s enhanced the physical stability of amorphous drugs. It is worthy to mention that the salt formation between the drug and the poly (amino acid) does not necessarily mean better performance compared to non-salt forming systems, and salt formation is also not a prerequisite for the formation of promising drug-poly (amino acid) ASDs.
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Affiliation(s)
- Qiang Huang
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325024, Zhejiang, China
| | - Zhiren Zou
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325024, Zhejiang, China
| | - Xiaobo Li
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325024, Zhejiang, China
| | - Qinwen Xiao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Guang Liang
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325024, Zhejiang, China; Affiliated Yongkang First People's Hospital and School of Pharmacy, Hangzhou Medical College, Hangzhou 310014, Zhejiang, China.
| | - Wenqi Wu
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China; Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325024, Zhejiang, China.
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6
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Liu X, Zhao L, Wu B, Chen F. Improving solubility of poorly water-soluble drugs by protein-based strategy: A review. Int J Pharm 2023; 634:122704. [PMID: 36758883 DOI: 10.1016/j.ijpharm.2023.122704] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/30/2023] [Accepted: 02/04/2023] [Indexed: 02/10/2023]
Abstract
Poorly water-soluble drugs are frequently encountered and present a most challengeable difficulty in pharmaceutical development. Poor solubility of drugs can lead to suboptimal bioavailability and therapeutic efficiency. Increasing efforts have been contributed to improve the solubility of poorly water-soluble drugs for better pharmacokinetics and pharmacodynamics. Among various solubility enhancement technologies, protein-based strategy to address poorly water-soluble drugs issues has special interests for natural advantages including versatile interactions between proteins and hydrophobic drugs, biocompatibility, biodegradation, and metabolization of proteins. The protein-drug formulations could be formed by covalent conjugations or noncovalent interactions to facilitate solubility of poorly water-soluble drugs. This review is to summarize the advances using proteins including plant proteins, mammalian proteins, and recombinant proteins, to enhance water solubility of poorly water-soluble drugs.
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Affiliation(s)
- Xiaowen Liu
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China; Shanghai Engineering Research Center of Industrial Asymmetric Catalysis of Chiral Drugs, 220 Handan Road, Shanghai 200433, China.
| | - Limin Zhao
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China; Shanghai Engineering Research Center of Industrial Asymmetric Catalysis of Chiral Drugs, 220 Handan Road, Shanghai 200433, China
| | - Baojian Wu
- Institute of Molecular Rhythm and Metabolism, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Fener Chen
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China; Shanghai Engineering Research Center of Industrial Asymmetric Catalysis of Chiral Drugs, 220 Handan Road, Shanghai 200433, China.
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7
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Pigliacelli C, Belton P, Wilde P, Bombelli FB, Kroon PA, Winterbone MS, Qi S. Interaction of polymers with bile salts - Impact on solubilisation and absorption of poorly water-soluble drugs. Colloids Surf B Biointerfaces 2023; 222:113044. [PMID: 36436403 DOI: 10.1016/j.colsurfb.2022.113044] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 11/01/2022] [Accepted: 11/18/2022] [Indexed: 11/21/2022]
Abstract
Formulating poorly soluble drugs with polymers in the form of solid dispersions has been widely used for improving drug dissolution. Endogenous surface-active species present in the gut, such as bile salts, lecithin and other phospholipids, have been shown to play a key role in facilitating lipids and poorly soluble drugs solubilisation in the gut. In this study, we examined the possible occurrence of interactions between a model bile salt, sodium taurocholate (NaTC), and model spray dried solid dispersions comprising piroxicam and Hydroxypropyl Methylcellulose (HPMC), a commonly used hydrophilic polymer for solid dispersion preparation. Solubility measurements revealed the good solubilisation effect of NaTC on the crystalline drug, which was enhanced by the addition of HPMC, and further boosted by the drug formulation into solid dispersion. The colloidal behaviour of the solid dispersions upon dissolution in biorelevant media, with and without NaTC, revealed the formation of NaTC-HPMC complexes and other mixed colloidal species. Cellular level drug absorption studies obtained using Caco-2 monolayers confirmed that the combination of drug being delivered by solid dispersion and the presence of bile salt and lecithin significantly contributed to the improved drug absorption. Together with the role of NaTC-HPMC complexes in assisting the drug solubilisation, our results also highlight the complex interplay between bile salts, excipients and drug absorption.
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Affiliation(s)
- Claudia Pigliacelli
- School of Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK; Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milan, Italy.
| | - Peter Belton
- School of Chemistry, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK
| | - Peter Wilde
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk NR4 7UQ, UK
| | - Francesca Baldelli Bombelli
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milan, Italy
| | - Paul A Kroon
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk NR4 7UQ, UK
| | - Mark S Winterbone
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk NR4 7UQ, UK
| | - Sheng Qi
- School of Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK.
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8
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Xie F, Slak J, Fardim P, Van den Mooter G. Novel cationic cellulose beads for oral delivery of poorly water-soluble drugs. Int J Pharm X 2023; 5:100146. [PMID: 36593986 DOI: 10.1016/j.ijpx.2022.100146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022] Open
Abstract
Cellulose beads emerge as carriers for poorly water-soluble drugs due to their eco-friendly raw materials and favorable porous structure. However, drug dissolution may be limited by their poor swelling ability and the presence of closed pores caused by shrinkage of the pristine cellulose beads. In this study, novel cellulose beads that can swell in acidic environment were prepared by introducing ethylenediamine (EDA) on dialdehyde cellulose (DAC), thereby addressing the shrinkage and closed pore problem of cellulose beads. The effect of the ratio of EDA on the swelling behavior and amine content of beads was studied. Three model drugs with different physicochemical properties were selected to study the physical state of loaded drugs and their release behavior. According to the results of XRPD and DSC, indomethacin and itraconazole loaded in the beads were amorphous at a drug loading of 20%, but fenofibrate was partially crystalline. Both bead size and the ratio of amine groups influenced the release behavior of the model drugs. The in vitro dissolution results showed that the cationic beads greatly improved the solubility and dissolution rate of the drug compared with the crystalline drug. Beads with a small size and high ratio of EDA tend to achieve a better drug dissolution rate and cumulative release percentage. Physical stability studies of the itraconazole-loaded beads were also implemented under four different temperature/humidity conditions for up to two months. The results showed that crystallization only appeared after two months of storage at 40°/75% RH, and the drug maintained a non-crystalline state in the other three storage conditions (0 °C/0 %RH, 0 °C/32 %RH, 25 °C/32 %RH). In conclusion, the novel pH-responsive cationic cellulose beads show great potential as a carrier for improving the rate and extent of dissolution of poorly soluble drugs and maintaining supersaturation.
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Key Words
- AC, Acetone
- Amorphous state
- CBs, Cellulose beads
- Cationic cellulose beads
- DAC, Dialdehyde cellulose
- DCM, Dichloromethane
- DMSO, Dimethyl sulfoxide
- EDA, Ethylenediamine
- EtOH, Ethanol
- FNB, Fenofibrate
- FTIR, Fourier-transform infrared spectroscopy
- HPLC, High performance liquid chromatography
- ILs, Ionic liquids
- IND, Indomethacin
- ITZ, Itraconazole
- MeOH, Methanol
- NASDs, Amorphous solid dispersions
- NCEs, New Chemical Entities
- NMMO, N-methylmorpholine N –oxide
- Poorly water-soluble drugs
- SGF, Simulated gastric fluid
- Solubility improvement
- Supersaturation
- Swelling
- TBA, Tert-butanol
- Tg, Glass transition temperature
- XRPD, X-ray powder diffraction
- mDSC, Modulated differential scanning calorimetry
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Elbrink K, Van Hees S, Roelant D, Loomans T, Holm R, Kiekens F. The influence on the oral bioavailability of solubilized and suspended drug in a lipid nanoparticle formulation: in vitro and in vivo evaluation. Eur J Pharm Biopharm 2022; 179:1-10. [PMID: 36031014 DOI: 10.1016/j.ejpb.2022.08.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/16/2022] [Accepted: 08/22/2022] [Indexed: 11/18/2022]
Abstract
The present study investigated the oral bioavailability of celecoxib when incorporated into solid lipid nanoparticles either dissolved or suspended. In vitro drug release in different media, in vivo performance, and in vitro-in vivo correlation were conducted. The results revealed that the compound was successfully encapsulated into the nanocarriers with good physicochemical properties for oral administration. The in vitro release profiles followed the Weibull model, with significant differences between the formulations containing the solubilized and the suspended compound. Furthermore, in vitro release data could be used to rank the observed in vivo bioavailability. The relative bioavailability of celecoxib from the solid lipid nanoparticles was 2.5- and 1.8-fold higher for the drug solubilized and suspended solid lipid nanoparticle formulation, respectively, when compared to the celecoxib reference. A significant difference was observed between the plasma concentration-time profiles and pharmacokinetic parameters for the three investigated formulations. Finally, this investigation displayed promising outcomes that both solubilized and suspended celecoxib in the lipid core of the solid lipid nanoparticles offers the potential to improve the compound's oral bioavailability and thereby reduce the dosing frequency.
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Affiliation(s)
- Kimberley Elbrink
- University of Antwerp, Department of Pharmaceutical Technology and Biopharmacy, Universiteitsplein 1, 2610 Wilrijk, Belgium.
| | - Sofie Van Hees
- University of Antwerp, Department of Pharmaceutical Technology and Biopharmacy, Universiteitsplein 1, 2610 Wilrijk, Belgium.
| | - Dirk Roelant
- Janssen Pharmaceutica, Discovery Sciences, DMPK, Turnhoutseweg 30, 2340 Beerse, Belgium.
| | - Tine Loomans
- Janssen Pharmaceutica, Discovery Sciences, DMPK, Turnhoutseweg 30, 2340 Beerse, Belgium.
| | - René Holm
- Janssen Pharmaceutica, Drug Product and Development, Parenterals and Liquids, Turnhoutseweg 30, 2340 Beerse, Belgium; University of Southern Denmark, Department of Physics, Chemistry, and Pharmacy, Campusvej 55, 5230 Odense, Denmark.
| | - Filip Kiekens
- University of Antwerp, Department of Pharmaceutical Technology and Biopharmacy, Universiteitsplein 1, 2610 Wilrijk, Belgium.
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Zhang J, Liu M, Zeng Z. The antisolvent coprecipitation method for enhanced bioavailability of poorly water-soluble drugs. Int J Pharm 2022; 626:122043. [PMID: 35902056 DOI: 10.1016/j.ijpharm.2022.122043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 07/13/2022] [Accepted: 07/18/2022] [Indexed: 11/25/2022]
Abstract
In recent years, poorly water-soluble drug candidates in the drug development pipeline have been a challenging issue for the pharmaceutical industry. Many delivery systems such as nanocrystals, cocrystals, nanoparticles, and amorphous solid dispersions (ASDs) have been developed to overcome these problems. A large number of methods are utilized to realize the above delivery systems. Among all the preparation methods, the antisolvent coprecipitation method is a relatively simple, cost-effective method, offering many advantages over conventional methods. An overview of recent developments for each solubility enhancement approach using the antisolvent coprecipitation method is presented. This current review details a comprehensive overview of the antisolvent coprecipitation process and its properties, as well as the fundamentals for enhancing the solubility and bioavailability of poorly water-soluble drugs by nanotization, polymorph control with polymers and/or surfactants. Furthermore, this review also presents insights into the factors affecting the antisolvent coprecipitation process.
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Affiliation(s)
- Jie Zhang
- College of Biological and Chemical Engineering, Changsha University, Changsha 410022, China; Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
| | - Minzhuo Liu
- College of Biological and Chemical Engineering, Changsha University, Changsha 410022, China
| | - Zhihong Zeng
- College of Biological and Chemical Engineering, Changsha University, Changsha 410022, China.
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11
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Xie F, Fardim P, Van den Mooter G. Porous soluble dialdehyde cellulose beads: A new carrier for the formulation of poorly water-soluble drugs. Int J Pharm 2022; 615:121491. [PMID: 35063594 DOI: 10.1016/j.ijpharm.2022.121491] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/12/2022] [Accepted: 01/14/2022] [Indexed: 11/19/2022]
Abstract
Cellulose beads are porous spherical particles with promising futures for drug delivery applications. In this study, novel dialdehyde cellulose (DAC) beads are developed by periodate oxidation of pristine cellulose for oral delivery of weakly basic poorly water-soluble drugs. Diazepam and itraconazole were studied as model drugs. Drug loadings in DAC beads up to 40% were obtained. Depending on the drug loading, complete or partial amorphization of drugs in DAC beads was observed. Drugs in the amorphous state not only presented a higher extent of dissolution from the DAC beads compared to the crystalline model drug, but the obtained concentration was also supersaturated. This supersaturation is attributed to the amorphization of the drugs in the beads in conjunction with the dissolution of the DAC beads at a neutral pH of the dissolution medium. Further, the effects of two different solvent systems used in the lyophilization step during the preparation of the DAC beads (100% water and 90/10% tert-butanol/water mixture) on their structure were investigated. Interestingly, the selection of the solvent system greatly impacted the bead structure, resulting in radically different drug loading capacity, physical properties, and release behavior of the model drugs. In summary, this is the first study that reports on exploiting soluble, porous, dialdehyde cellulose beads, showing great potential as a carrier for improving the rate and extent of dissolution of poorly soluble drugs and maintaining supersaturation.
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Affiliation(s)
- Fan Xie
- Drug Delivery and Disposition, KU Leuven, Department of Pharmaceutical and Pharmacological Sciences, Campus Gasthuisberg ON2, Herestraat 49 b921, 3000 Leuven, Belgium
| | - Pedro Fardim
- Bio&Chemical Systems Technology, Reactor Engineering and Safety, Department of Chemical Engineering, KU Leuven, 3000 Leuven, Belgium
| | - Guy Van den Mooter
- Drug Delivery and Disposition, KU Leuven, Department of Pharmaceutical and Pharmacological Sciences, Campus Gasthuisberg ON2, Herestraat 49 b921, 3000 Leuven, Belgium.
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12
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Phan TTH, Tran PHL, Tran TTD. Effects of Mucoadhesive Polymers on Released Particles and Drug Release in Solid Lipid Particle-Based Buccal Tablets. Anticancer Agents Med Chem 2021; 21:1894-1900. [PMID: 33292142 DOI: 10.2174/1871520621666201207091827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/23/2020] [Accepted: 10/19/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Mucoadhesive polymers play a critical role in controlled-release tablets for buccal drug delivery. OBJECTIVE This research aimed to investigate the characterization and mechanisms of solid lipid particle-based tablets with different mucoadhesive polymers for buccal delivery. METHODS Prednisolone (PSL)-loaded Solid Lipid Particles (SLPs) were conventionally prepared by ultrasonication. The freeze-drying method was used to convert the SLP suspension into a solid dosage form for buccal delivery by using mucoadhesive polymers. RESULTS All formulations showed over 80% drug release after 6h, which followed immediate and sustained release patterns depending on the SLP type. However, the different polymers in the formulations resulted in different mucoadhesion times and drug release and drug permeability profiles. HPMC 4000 showed higher drug permeation (3327 μg vs. 2589 μg after 6h) but a shorter mucoadhesion time than Carbopol (197 min vs. 361 min). In addition, surface morphology, swelling and erosion, particle size and zeta potential were also noted for the different mechanisms for buccal tablet design with different controlled release profiles. CONCLUSION The results of this work indicate a good strategy for the selection of mucoadhesive polymers for SLP-based tablets in improving the bioavailability of poorly water-soluble drugs.
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Affiliation(s)
- Thuy T H Phan
- Former Student at International University, Ho Chi Minh City, Vietnam
| | - Phuong H L Tran
- Deakin University, School of Medicine, IMPACT, Institute for Innovation in Physical and Mental Health and Clinical Translation, Geelong, Australia
| | - Thao T D Tran
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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13
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Müller M, Platten F, Dulle M, Fischer B, Hoheisel W, Serno P, Egelhaaf S, Breitkreutz J. Precipitation from amorphous solid dispersions in biorelevant dissolution testing: The polymorphism of regorafenib. Int J Pharm 2021; 603:120716. [PMID: 34015382 DOI: 10.1016/j.ijpharm.2021.120716] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 05/07/2021] [Accepted: 05/14/2021] [Indexed: 11/27/2022]
Abstract
Amorphous Solid Dispersions (ASDs) are a major drug formulation technique to achieve higher bioavailability for poorly water-soluble active pharmaceutical ingredients. So far, dissolution tailoring and supersaturation enhancement have been studied in detail, whereas less is known about the importance of formed precipitates with amorphous or crystalline states at the site of drug absorption. Regorafenib monohydrate (RGF MH), a multikinase inhibitor drug categorized as Biopharmaceutics Classification System (BCS) class II compound, was formulated with povidone K25 and hypromellose acetate succinate (HPMCAS) as an ASD. Here, for the first time, the RGF precipitation process as well as the physicochemical properties of the arising precipitates are investigated. The formed precipitates from biorelevant dissolution showed varying drug content and were analyzed offline by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), confocal Raman microscopy (CRM), X-ray powder diffraction (XRPD), and small angle X-ray scattering (SAXS). In addition to different crystalline RGF precipitates, an amorphous co-precipitate of RGF and HPMCAS was identified, which was suppressed in the presence of PVP. Wide angle X-ray scattering (WAXS) and isothermal calorimetry (ITC) were used to track the precipitation process of RGF in-situ. From calorimetric data, the precipitation profile was calculated. RGF forms precipitates in multiple polymorphic states dependent on the environmental conditions, i.e., dissolution media composition and chosen excipients. The engineered formation of defined amorphous structures in-vivo may be a promising future drug formulation strategy.
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Affiliation(s)
- Martin Müller
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University Düsseldorf, Germany, Universitätsstraße 1, 40225 Düsseldorf, Germany; INVITE GmbH, Formulation Technology, Chempark, Building W 32, 51368 Leverkusen, Germany
| | - Florian Platten
- Condensed Matter Physics Laboratory, Heinrich Heine University, Universitätsstraße 1, 40225 Düsseldorf, Germany; Forschungszentrum Jülich, IBI-4, Wilhelm-Johnen-Straße, 52428 Jülich Jülich, Germany
| | - Martin Dulle
- Forschungszentrum Jülich, JCNS-1/IBI-8, Wilhelm-Johnen-Straße, 52428 Jülich Jülich, Germany
| | - Björn Fischer
- FISCHER GmbH, Raman Spectroscopic Services, Necklenbroicher Str. 22, 40667 Meerbusch, Germany
| | - Werner Hoheisel
- INVITE GmbH, Formulation Technology, Chempark, Building W 32, 51368 Leverkusen, Germany
| | - Peter Serno
- Bayer AG, Research Center Wuppertal-Elberfeld, Friedrich-Ebert-Straße 217-333, 42117 Wuppertal, Germany
| | - Stefan Egelhaaf
- Condensed Matter Physics Laboratory, Heinrich Heine University, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Jörg Breitkreutz
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University Düsseldorf, Germany, Universitätsstraße 1, 40225 Düsseldorf, Germany.
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14
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Potrč T, Murnc K, Kocbek P. Hydrophilic nanofibers as a supersaturating delivery system for carvedilol. Int J Pharm 2021; 603:120700. [PMID: 33989751 DOI: 10.1016/j.ijpharm.2021.120700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 05/04/2021] [Accepted: 05/08/2021] [Indexed: 11/22/2022]
Abstract
Polymer nanofibers represent a promising delivery system for poorly water-soluble drugs; however, their supersaturating potential has not been explored yet. Here, carvedilol-loaded nanofibers based on poly(ethyleneoxide) and on amphiphilic block copolymer poloxamer 407 were produced by electrospinning. These nanofibers provided high carvedilol loading and improved dissolution of carvedilol. Their dissolution resulted in a supersaturated system that was not stable, and thus to avoid carvedilol precipitation, hydroxypropyl methylcelluloses or polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer (Soluplus) were additionally incorporated into the nanofibers. The morphology of the electrospun product was not affected by incorporation of carvedilol and the polymer precipitation inhibitors, as shown by scanning electron microscopy. The hydroxypropyl methylcelluloses were not effective polymer precipitation inhibitors for carvedilol. Incorporation of Soluplus significantly extended the duration of carvedilol supersaturation (>24 h) compared to the dissolution of nanofibers without Soluplus. Moreover, after 1 h of dissolution, incorporation of Soluplus into the nanofibers provided significantly higher carvedilol concentration (94.4 ± 2.5 μg/mL) compared to the nanofibers without Soluplus (32.7 ± 5.8 μg/mL), the polymer film (24.0 ± 2.2 μg/mL), and the physical mixture (3.3 ± 0.4 μg/mL). Thus, this study shows the great potential for hydrophilic nanofibers as a delivery system for sustained carvedilol supersaturation.
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15
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Tran PHL, Lee BJ, Tran TTD. Recent studies on the processes and formulation impacts in the development of solid dispersions by hot-melt extrusion. Eur J Pharm Biopharm 2021; 164:13-19. [PMID: 33887388 DOI: 10.1016/j.ejpb.2021.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/20/2021] [Accepted: 04/11/2021] [Indexed: 10/21/2022]
Abstract
Industrial-scale pharmaceutical applications still face many challenges in overcoming the low absorption and bioavailability of poorly water-soluble drugs. Hot-melt extrusion has emerged as a promising approach with continuous processing on an industrial scale for the preparation of drug delivery systems. Many reviews have mentioned the potential applications, processes, principles and advantages and disadvantages of hot-melt extrusion in the pharmaceutical industry. However, a focus on the recent progress of hot-melt extrusion, which investigates the impacts of processes and formulations of solid dispersions of poorly water-soluble drugs, is missing. In this review, various factors, including polymers, drug properties, additives and surfactants, in solid dispersion SD formulations by hot-melt extrusion will be discussed. Moreover, the effects of the hot-melt extrusion process on the physicochemical properties of solid dispersions will be mentioned. The utilization of molecular interactions in hot-melt extrusion to improve drug stability will also be described. Overall, this summary of recent studies on solid dispersion by hot-melt extrusion will provide perspectives and effectiveness for the development of formulations containing poorly water-soluble drugs.
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Affiliation(s)
- Phuong H L Tran
- Deakin University, School of Medicine, IMPACT, Institute for Innovation in Physical and Mental Health and Clinical Translation, Geelong, Australia
| | - Beom-Jin Lee
- College of Pharmacy, Ajou University, Suwon, Republic of Korea
| | - Thao T D Tran
- Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam; The Faculty of Pharmacy, Duy Tan University, Danang 550000, Vietnam.
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16
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Katev V, Vinarov Z, Tcholakova S. 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] [What about the content of this article? (0)] [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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17
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Chivate A, Garkal A, Dhas N, Mehta T. Hot-Melt Extrusion: An Emerging Technique for Solubility Enhancement of Poorly Water-Soluble Drugs. PDA J Pharm Sci Technol 2021; 75:357-373. [PMID: 33608469 DOI: 10.5731/pdajpst.2019.011403] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The solubility of the drug is a significant aspect to be considered during manufacturing of pharmaceutical products. Poor aqueous solubility of drugs imparts depleted bioavailability. In this regard, several techniques are available for enhancing drug solubility or dissolution. However, only few of them are scalable and industrially applicable. Hot-melt extrusion (HME) is one such technique that has been widely used in the industry. It is a single-step, continuous manufacturing, and scalable method that has proved successful in improving the solubility of poorly soluble drugs. This review highlights the numerous pharmaceutical applications of HME, such as formulations of sterile implants, taste masking of unpleasant drugs, cocrystallization, salt formation, sustained and controlled release formulations, etc. It also describes various hydrophilic and hydrophobic carriers utilized in HME. This review also briefly discusses the recent advances in HME and gives an update on the currently available marketed products. The opportunities and challenges in future development of pharmaceutical products by HME technique are also discussed.
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Affiliation(s)
- Amit Chivate
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat, India.,Roquette India Ltd., Area Market Manager, India, South East Asia, Middle East Africa and Australia & New Zealand
| | - Atul Garkal
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat, India
| | - Namdev Dhas
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat, India.,SRES Sanjivani College of Pharmaceutical Education and Research, Sahajanandnagar, Singnapur, Kopargaon, Ahmednagar, Maharashtra 423603, India; and
| | - Tejal Mehta
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat, India;
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18
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Fink C, Lecomte M, Badolo L, Wagner K, Mäder K, Peters SA. Identification of solubility-limited absorption of oral anticancer drugs using PBPK modeling based on rat PK and its relevance to human. Eur J Pharm Sci 2020; 152:105431. [PMID: 32562690 DOI: 10.1016/j.ejps.2020.105431] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 05/19/2020] [Accepted: 06/16/2020] [Indexed: 10/24/2022]
Abstract
Solubility is one of the key parameters that is optimized during drug discovery to ensure sufficient drug concentration in systemic circulation and to achieve the desired pharmacological response. We recently reported the application of PBPK analysis of early clinical pharmacokinetic data to identify drugs whose absorption are truly limited by solubility. In this work, we selected ten anticancer drugs that exhibit poor in vitro solubility to explore the utility of this approach to identify solubility-limited absorption based on rat pharmacokinetic data and compare the findings to human data. Oral rat pharmacokinetic studies were performed at the body weight-scaled doses of the model drugs' human food effect studies, and analyzed using a top-down PBPK modeling approach. A good correlation of solubility-limited absorption in rat and human was observed. These results allow an early identification of drugs with truly solubility-limited absorption, with the potential to guide decisions and save valuable resources in drug development.
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Affiliation(s)
- Christina Fink
- Chemical Pharmaceutical Development, Merck KGaA, Darmstadt, Germany; Institute of Pharmacy, Faculty of Biosciences, Martin-Luther University Halle-Wittenberg, Germany
| | - Marc Lecomte
- NCE DMPK, Discovery Technology, Merck KGaA, Darmstadt, Germany
| | - Lassina Badolo
- NCE DMPK, Discovery Technology, Merck KGaA, Darmstadt, Germany
| | - Knut Wagner
- Chemical Pharmaceutical Development, Merck KGaA, Darmstadt, Germany
| | - Karsten Mäder
- Institute of Pharmacy, Faculty of Biosciences, Martin-Luther University Halle-Wittenberg, Germany
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19
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AboulFotouh K, Zhang Y, Maniruzzaman M, Williams RO, Cui Z. Amorphous solid dispersion dry powder for pulmonary drug delivery: Advantages and challenges. Int J Pharm 2020; 587:119711. [PMID: 32739389 DOI: 10.1016/j.ijpharm.2020.119711] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/11/2020] [Accepted: 07/27/2020] [Indexed: 12/21/2022]
Abstract
Amorphous solid dispersion (ASD) is commonly used in pharmaceutical industry. It has been mainly employed to enhance the oral bioavailability of poorly water-soluble drugs that belong to class II and IV of the biopharmaceutical classification system but has showed promise in other areas of pharmaceutical research. In this review, the potential and limitations of ASD dry powder for inhalation are discussed. ASD powder for inhalation (ASD-IP) is commonly prepared by spray drying technique. The physicochemical characteristics of ASD-IP could be tailored to achieve effective lung deposition. ASD-IP could also attain rapid dissolution behavior to achieve therapeutically effective concentration either locally or systemically before particle clearance in the lung. The key challenges of using ASD powder for inhalation include the possible chemical and/or physical instability of the amorphous phase during manufacturing and in vivo, and the moisture and temperature sensitivity of ASD-IP that affects its storage stability.
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Affiliation(s)
- Khaled AboulFotouh
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA; Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt.
| | - Yi Zhang
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Mohammed Maniruzzaman
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Robert O Williams
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Zhengrong Cui
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA.
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20
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Schittny A, Philipp-Bauer S, Detampel P, Huwyler J, Puchkov M. Mechanistic insights into effect of surfactants on oral bioavailability of amorphous solid dispersions. J Control Release 2020; 320:214-225. [PMID: 31978445 DOI: 10.1016/j.jconrel.2020.01.031] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 12/05/2019] [Accepted: 01/17/2020] [Indexed: 02/04/2023]
Abstract
Drug delivery of poorly soluble drugs in form amorphous solid dispersions (ASDs) is an appealing method to increase in vivo bioavailability. For rational formulation design, a mechanistic understanding of the impact of surfactants on the performance of ASD-based formulations is therefore of importance. In this study, we used hot-melt extrusion to prepare ASDs composed of the model drug substance efavirenz with hydroxypropyl methylcellulose phthalate (HPMCP) as the base polymer, and surfactants. Molecular dynamics simulations and in vitro dissolution studies were used to investigate formation and drug release from polymer vesicles, and their ability to maintain a supersaturation state as a function of surfactant composition. It was possible to identify main factors regulating particle formation and to modify dissolution profiles with different excipient compositions. Animal studies in the rat, in combination with physiologically based pharmacokinetic modeling, demonstrated enhanced drug absorption from formed vesicles. The surfactant composition in the ASD had a direct influence on the morphology of these vesicles, as well as kinetics of drug release, and, therefore, the oral bioavailability. ASDs, prepared by hot-melt extrusion method, were optimized for dissolution and adsorption rates increase. Our findings contribute to a better understanding of dissolution behavior of ASDs with respect to the function of surfactants, aiming to facilitate a rational formulation development and an accelerated transition from in vitro systems to in vivo applications.
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Affiliation(s)
- A Schittny
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, Switzerland; Division of Clinical Pharmacology and Toxicology, Department of Biomedicine, University Hospital Basel and University of Basel, Switzerland
| | - S Philipp-Bauer
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, Switzerland
| | - P Detampel
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, Switzerland
| | - J Huwyler
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, Switzerland
| | - M Puchkov
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, Switzerland.
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21
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Kim D, Park C, Meghani NM, Tran TTD, Tran PHL, Park JB, Lee BJ. Utilization of a fattigation platform gelatin-oleic acid sodium salt conjugate as a novel solubilizing adjuvant for poorly water-soluble drugs via self-assembly and nanonization. Int J Pharm 2019; 575:118892. [PMID: 31786354 DOI: 10.1016/j.ijpharm.2019.118892] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 11/11/2019] [Accepted: 11/16/2019] [Indexed: 12/18/2022]
Abstract
Solubilizing adjuvants are commonly used to dissolve insoluble drugs by simply adding in a formulation. In this study, gelatin and oleic acid sodium salt (OAS), a generally recognized as safe-listed material were chosen and conjugated to develop a natural solubilizing adjuvant using the fattigation platform technology to enhance solubility and dissolution rate of poorly water-soluble drugs according to self-assembly and nanonization principle when simply mixed with poorly water-soluble drugs. We synthesized the gelatin and OAS conjugates (GOC) at three different ratios (1:1, 1:3, 1:5; GOC 1, GOC 2, and GOC 3, respectively) via the 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide/N-hydroxysuccinimide reaction using a spray dryer. This amphiphilic micronized GOC was self-assembled into nanoparticles. The synthesis of new amphiphilic conjugates was identified through Fourier transform-infrared (FT-IR) spectroscopy. The powder properties of the GOCs, such as angle of repose, bulk density, and tapped density were varied with the oleic acid bonding ratio. Then, GOCs were utilized to investigate the enhanced solubility and release rate of various poorly water-soluble drugs such as cilostazol (CSZ), coenzyme Q10, ticagrelor, telmisartan, aprepitant and itraconazole as model drugs. Based on the solubility studies by concentration and type of GOCs, 3% GOC 2 was selected. When this GOC was mixed with these model drugs by the physical mixing, wetting and hot melting methoods, the solubility was highly enhanced compared to the pure control drug, ranging from 20 to 150,000 times. In case of CSZ, all formulations were significantly improved release rate compared to the of CSZ alone and the reference tablet, cilostan® (Korea United Pharm) in simulated intestinal fluid containing 0.2% sodium lauryl sulfate. Differential scanning calorimetry and powder X-ray diffraction were conducted to confirm the crystal polymorphic structure of CSZ, and as a result they changed to diminutive peak intensity compared to CSZ alone. Field-emission scanning electron microscopy indicated that GOC was round with a reduced size of about 100 nm. The reduction of drug particles via nanonization and self-assembly of amphiphilic GOC in an aqueous media could be a key factor to improve poor water solubility by providing a favorable dispersion of drug molecules in an amphiphilic network.
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Affiliation(s)
- Dayoung Kim
- College of Pharmacy, Ajou University, Suwon 16499, Republic of Korea
| | - Chulhun Park
- College of Pharmacy, Ajou University, Suwon 16499, Republic of Korea
| | | | - Thao T D Tran
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Viet Nam
| | - Phuong H L Tran
- Deakin University, Geelong Australia, School of Medicine, Australia
| | - Jun-Bom Park
- College of Pharmacy, Sahmyook University, Seoul 01795, Republic of Korea
| | - Beom-Jin Lee
- College of Pharmacy, Ajou University, Suwon 16499, Republic of Korea.
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22
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Alshaikh RA, Essa EA, El Maghraby GM. Preparation of stabilized submicron fenofibrate crystals on niacin as a hydrophilic hydrotropic carrier. Pharm Dev Technol 2019; 25:168-177. [PMID: 31642728 DOI: 10.1080/10837450.2019.1682609] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Fenofibrate is antihyperlipidemic which has low and variable oral bioavailability due to erratic dissolution characteristics. Niacin showed a potential atheroprotective effects suggesting possible co-administration with fenofibrate with a potential for development of fixed dose combination. The chemical structure of both drugs highlights the opportunity for interaction upon co-processing due to the existence of complementary hydrogen bonding sites. Accordingly, fenofibrate and niacin were co-processed by wet co-grinding and the resulting product was assessed using scanning electron microscopy, FTIR, thermal analysis and X-ray diffraction in addition to dissolution studies. The instrumental analysis indicated the development of submicron fenofibrate crystals stabilized over the surface of niacin crystals. The developed submicron crystals showed fast dissolution of fenofibrate depending on the relative proportions of fenofibrate to niacin. Co-processing of both drugs at dose ratio which contained higher proportion of niacin resulted in further enhancement in the dissolution rate. This further enhancement was attributed to the hydrotropic effect of niacin which was proved by solubility study in addition to size reduction. This supposition was confirmed from the inferior dissolution of fenofibrate from the physical mixture. The study introduces fenofibrate/niacin as potential fixed dose combination for augmented dissolution rate and pharmacological effects.
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Affiliation(s)
- Rasha A Alshaikh
- Department of Pharmaceutical Technology, College of Pharmacy, University of Tanta, Tanta, Egypt
| | - Ebtessam A Essa
- Department of Pharmaceutical Technology, College of Pharmacy, University of Tanta, Tanta, Egypt
| | - Gamal M El Maghraby
- Department of Pharmaceutical Technology, College of Pharmacy, University of Tanta, Tanta, Egypt
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Boyd BJ, Bergström CAS, Vinarov Z, Kuentz M, Brouwers J, Augustijns P, Brandl M, Bernkop-Schnürch A, Shrestha N, Préat V, Müllertz A, Bauer-Brandl A, Jannin V. Successful oral delivery of poorly water-soluble drugs both depends on the intraluminal behavior of drugs and of appropriate advanced drug delivery systems. Eur J Pharm Sci 2019; 137:104967. [PMID: 31252052 DOI: 10.1016/j.ejps.2019.104967] [Citation(s) in RCA: 174] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 05/27/2019] [Accepted: 06/21/2019] [Indexed: 12/11/2022]
Abstract
Poorly water-soluble drugs continue to be a problematic, yet important class of pharmaceutical compounds for treatment of a wide range of diseases. Their prevalence in discovery is still high, and their development is usually limited by our lack of a complete understanding of how the complex chemical, physiological and biochemical processes that occur between administration and absorption individually and together impact on bioavailability. This review defines the challenge presented by these drugs, outlines contemporary strategies to solve this challenge, and consequent in silico and in vitro evaluation of the delivery technologies for poorly water-soluble drugs. The next steps and unmet needs are proposed to present a roadmap for future studies for the field to consider enabling progress in delivery of poorly water-soluble compounds.
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24
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Pigliacelli C, Belton P, Wilde P, Qi S. Probing the molecular interactions between pharmaceutical polymeric carriers and bile salts in simulated gastrointestinal fluids using NMR spectroscopy. J Colloid Interface Sci 2019; 551:147-154. [PMID: 31075629 DOI: 10.1016/j.jcis.2019.05.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/29/2019] [Accepted: 05/01/2019] [Indexed: 02/04/2023]
Abstract
The number of poorly soluble new drugs is increasing and one of the effective ways to deliver such pharmaceutically active molecules is using hydrophilic polymers to form a solid dispersion. Bile salts play an important role in the solubilisation of poorly soluble compounds in the gastrointestinal tract (gut) prior to absorption. When a poorly water-soluble drug is delivered using a hydrophilic polymer based solid dispersion oral formulation, it is still unclear whether there are any polymer-bile salt interactions, which may influence the drug dissolution and solubilisation. This study, using two widely used hydrophilic model polymers, Hydroxypropyl methylcellulose (HPMC) and polyvynilpirrolidone (PVP), and sodium taurocholate (NaTC) as the model bile salt, aims to investigate the interactions between the polymers and bile salts in simulated fed state (FeSSIF) and fasted state (FaSSIF) gut fluids. The nature of the interactions was characterised using a range of NMR techniques. The results revealed that the aggregation behaviour of NaTC in FaSSIF and FeSSIF is much more complex than in water. The addition of hydrophilic polymers led to the occurrences of NaTC-HPMC and NaTC-PVP aggregation. For both systems, pH and ionic strength strongly influenced the aggregation behavior, while the ion type played a less significant role. The outcome of this study enriched the understanding of the aggregation behaviour of bile salts and typical hydrophilic pharmaceutical polymers in bio-relevant media. Due to the high surface-activity of the bile salts and their ability to interact with polymers, such aggregation behaviour is expected to play a role in drug solubilisation in the gut when the drug is delivered by hydrophilic polymer based dispersions.
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Affiliation(s)
| | - Peter Belton
- School of Chemistry, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK
| | - Peter Wilde
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk NR4 7UA, UK
| | - Sheng Qi
- School of Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK.
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Joyce P, Dening TJ, Meola TR, Schultz HB, Holm R, Thomas N, Prestidge CA. Solidification to improve the biopharmaceutical performance of SEDDS: Opportunities and challenges. Adv Drug Deliv Rev 2019; 142:102-117. [PMID: 30529138 DOI: 10.1016/j.addr.2018.11.006] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 11/21/2018] [Accepted: 11/27/2018] [Indexed: 01/28/2023]
Abstract
Self-emulsifying drug delivery systems (SEDDS) offer potential for overcoming the inherent slow dissolution and poor oral absorption of hydrophobic drugs by retaining them in a solubilised state during gastrointestinal transit. However, the promising biopharmaceutical benefits of liquid lipid formulations has not translated into widespread commercial success, due to their susceptibility to long term storage and in vivo precipitation issues. One strategy that has emerged to overcome such limitations, is to combine the solubilisation and dissolution enhancing properties of lipids with the stabilising effects of solid carrier materials. The development of intelligent hybrid drug formulations has presented new opportunities to harness the potential of emulsified lipids in optimising oral bioavailability for lipophilic therapeutics. Specific emphasis of this review is placed on the impact of solidification approaches and excipients on the biopharmaceutical performance of self-emulsifying lipids, with findings highlighting the key design considerations that should be implemented when developing hybrid lipid-based formulations.
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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] [What about the content of this article? (0)] [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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27
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Yeap YY, Lock J, Lerkvikarn S, Semin T, Nguyen N, Carrier RL. Intestinal mucus is capable of stabilizing supersaturation of poorly water-soluble drugs. J Control Release 2018; 296:107-113. [PMID: 30527813 DOI: 10.1016/j.jconrel.2018.11.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 10/18/2018] [Accepted: 11/25/2018] [Indexed: 02/07/2023]
Abstract
The utilization of polymers to stabilize drug supersaturation and enhance oral drug absorption has recently garnered considerable interest. The potential role of intestinal mucus in stabilizing drug supersaturation, however, has not been previously explored. The ability for intestinal mucus to stabilize drug supersaturation and delay drug precipitation is potentially useful in enhancing the absorption of orally dosed compounds from drug delivery systems that generate supersaturation within the gastrointestinal tract (e.g., solid dispersions, lipid-based drug delivery systems). This work aims to evaluate the precipitation-delaying abilities of intestinal mucus using carvedilol (CVDL) and piroxicam (PXM) as model drugs. In supersaturation-precipitation (S-P) experiments, CVDL and PXM supersaturation were induced in test media (0, 0.1, 0.2, 0.4%w/v mucin and 8%w/v native pig intestinal mucus (PIM)) via the solvent-shift method at supersaturation ratios (SSR) of 5 and 6, respectively. Time to drug precipitation was assessed using ion-selective electrodes and HPLC. The S-P experiments showed that increasing mucin concentration led to increasingly delayed CVDL precipitation, while PXM precipitation was prevented at all mucin concentrations studied. The ability of mucus-stabilized CVDL supersaturation to translate into enhanced CVDL absorption was evaluated in transport experiments using mucus-producing (90% Caco-2:10% HT29-MTX-E12 co-cultures) vs. non-mucus-producing intestinal monolayers (100% Caco-2 cultures). The absorption enhancement of CVDL (SSR = 5 relative to SSR = 1) was higher across mucus-producing than non-mucus-producing intestinal monolayers. This work demonstrates the potential for intestinal mucus to delay the precipitation and enhance the absorption of poorly water-soluble compounds, suggesting that drug supersaturation can be stabilized in close proximity to the absorptive site, thereby presenting a possible novel approach for targeted supersaturating drug delivery systems.
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Affiliation(s)
- Yan Yan Yeap
- Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02110, United States
| | - Jaclyn Lock
- Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02110, United States
| | - Sean Lerkvikarn
- Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02110, United States
| | - Tanner Semin
- Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02110, United States
| | - Nicholas Nguyen
- Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02110, United States
| | - Rebecca L Carrier
- Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02110, United States.
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Mishra J, Bohr A, Rades T, Grohganz H, Löbmann K. Whey proteins as stabilizers in amorphous solid dispersions. Eur J Pharm Sci 2018; 128:144-151. [PMID: 30528387 DOI: 10.1016/j.ejps.2018.12.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 11/16/2018] [Accepted: 12/03/2018] [Indexed: 11/27/2022]
Abstract
Whey proteins are extensively used as nutritional supplements but have so far not been investigated as co-formers for amorphous solid dispersions (ASD) to enhance the solubility and dissolution rate of poorly water soluble drugs. In this study, whey protein isolate (WPI) and whey protein hydrolysate (WPH) were each mixed with three poorly water soluble drugs (indomethacin: IND, carvedilol: CAR and furosemide: FUR) and prepared as ASDs at 50% (w/w) drug loading using vibrational ball milling. Subsequently, solid state characteristics, dissolution rate and physical stability of the obtained samples were analyzed. All ASDs showed a significant increase in their glass transition temperatures, as well as faster dissolution rates and higher apparent solubilities compared to both the respective pure crystalline and amorphous drugs. The saturation solubility of the drugs was increased in the presence of the whey proteins, and the investigated ASDs showed supersaturation by attaining higher drug concentrations compared to the respective saturation solubilities. Upon storage, ASDs containing IND were found to be physically stable for at least 27 months, whereas, ASDs containing CAR or FUR were stable for about 8 months and 17 months, respectively. This was a tremendous increase in physical stability compared to the pure amorphous drugs which recrystallized within less than one week. Overall, WPI and WPH proved to be promising co-formers and amorphous stabilizers in ASD formulations.
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Affiliation(s)
- Jaya Mishra
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Adam Bohr
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Thomas Rades
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark; Department of Pharmacy, Faculty of Science and Engineering, Åbo Akademi University, 20521 Turku, Finland
| | - Holger Grohganz
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Korbinian Löbmann
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.
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Alskär LC, Keemink J, Johannesson J, Porter CJH, Bergström CAS. Impact of Drug Physicochemical Properties on Lipolysis-Triggered Drug Supersaturation and Precipitation from Lipid-Based Formulations. Mol Pharm 2018; 15:4733-4744. [PMID: 30142268 PMCID: PMC6209313 DOI: 10.1021/acs.molpharmaceut.8b00699] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
In
this study we investigated lipolysis-triggered supersaturation
and precipitation of a set of model compounds formulated in lipid-based
formulations (LBFs). The purpose was to explore the relationship between
precipitated solid form and inherent physicochemical properties of
the drug. Eight drugs were studied after formulation in three LBFs,
representing lipid-rich (extensively digestible) to surfactant-rich
(less digestible) formulations. In vitro lipolysis
of drug-loaded LBFs were conducted, and the amount of dissolved and
precipitated drug was quantified. Solid form of the precipitated drug
was characterized with polarized light microscopy (PLM) and Raman
spectroscopy. A significant solubility increase for the weak bases
in the presence of digestion products was observed, in contrast to
the neutral and acidic compounds for which the solubility decreased.
The fold-increase in solubility was linked to the degree of ionization
of the weak bases and thus their attraction to free fatty acids. A
high level of supersaturation was needed to cause precipitation. For
the weak bases, the dose number indicated that precipitation would
not occur during lipolysis; hence, these compounds were not included
in further studies. The solid state analysis proved that danazol and
griseofulvin precipitated in a crystalline form, while niclosamide
precipitated as a hydrate. Felodipine and indomethacin crystals were
visible in the PLM, whereas the Raman spectra showed presence
of amorphous drug, indicating amorphous precipitation that quickly
crystallized. The solid state analysis was combined with literature
data to allow analysis of the relationship between solid form and
the physicochemical properties of the drug. It was found that low
molecular weight and high melting temperature increases the probability
of crystalline precipitation, whereas precipitation in an amorphous
form was favored by high molecular weight, low melting temperature,
and positive charge.
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Affiliation(s)
- Linda C Alskär
- Department of Pharmacy , Uppsala University , Uppsala Biomedical Center P.O. Box 580, SE-751 23 Uppsala , Sweden
| | - Janneke Keemink
- Department of Pharmacy , Uppsala University , Uppsala Biomedical Center P.O. Box 580, SE-751 23 Uppsala , Sweden
| | - Jenny Johannesson
- Department of Pharmacy , Uppsala University , Uppsala Biomedical Center P.O. Box 580, SE-751 23 Uppsala , Sweden
| | - Christopher J H Porter
- Drug Delivery, Disposition and Dynamics , Monash Institute of Pharmaceutical Sciences, Monash University , 381 Royal Parade , Parkville , Victoria 3052 , Australia
| | - Christel A S Bergström
- Department of Pharmacy , Uppsala University , Uppsala Biomedical Center P.O. Box 580, SE-751 23 Uppsala , Sweden.,Drug Delivery, Disposition and Dynamics , Monash Institute of Pharmaceutical Sciences, Monash University , 381 Royal Parade , Parkville , Victoria 3052 , Australia
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30
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Vithani K, Hawley A, Jannin V, Pouton C, Boyd BJ. Solubilisation behaviour of poorly water-soluble drugs during digestion of solid SMEDDS. Eur J Pharm Biopharm 2018; 130:236-246. [PMID: 29981444 DOI: 10.1016/j.ejpb.2018.07.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 07/02/2018] [Accepted: 07/03/2018] [Indexed: 01/15/2023]
Abstract
Lipid based-formulations can enhance the bioavailability of poorly water-soluble lipophilic drugs through enhanced solubilisation of drugs in the gastrointestinal (GI) tract during digestion. This study investigates the solubilisation behaviour of poorly water-soluble drugs upon digestion of solid self-microemulsifying drug delivery system (S-SMEDDS). The S-SMEDDS were prepared using two different core lipids, Gelucire® 44/14 (GEL) or glyceryl monooleate (GMO), and were loaded with two model drugs, fenofibrate (FEN) and cinnarizine (CINN). S-SMEDDS formulations were characterized using wide-angle X-ray scattering (WAXS) and Raman spectroscopy, and their structural behaviour and drug solubilisation behaviour were monitored using drug-related diffraction peaks during digestion under fasted and fed simulated intestinal conditions using time-resolved small and wide-angle X-ray scattering (SAXS/WAXS). The concentrations of FEN and CINN released into the aqueous phase (AP) during digestion were quantified using high-performance liquid chromatography (HPLC). Both model drugs, FEN and CINN, had greater solubility in the GMO-based S-SMEDDS formulations and were partially solubilised into lipid matrix and uniformly distributed in solid formulations. The extent of digestion was greater for the GEL-based systems (92-94%) than GMO-based systems (65-75%) as was the rate of digestion. GEL-based S-SMEDDS formulations formed a lamellar phase during digestion in the fasted state and formed mixed micelles in the fed state. In contrast, the GMO-based system formed the mixed micelles in both intestinal conditions. The time-resolved SAXS profiles revealed solubilisation of crystalline drugs into the lipolysis products. Synchrotron SAXS results were in correlation with the HPLC measurements, confirming the ability of the SAXS technique to monitor drug behaviour and showing that the digestion of S-SMEDDS can enhance drug solubilisation.
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Affiliation(s)
- Kapilkumar Vithani
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), Parkville, Victoria 3052, Australia
| | - Adrian Hawley
- SAXS/WAXS Beamtime, Australian Synchrotron, ANSTO, Clayton, Victoria 3168, Australia
| | - Vincent Jannin
- Gattefossé SAS, 36 Chemin de Genas, 69804 Saint-Priest, France
| | - Colin Pouton
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), Parkville, Victoria 3052, Australia
| | - Ben J Boyd
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), Parkville, Victoria 3052, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University (Parkville Campus), Parkville, Victoria 3052, Australia.
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31
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Tres F, Posada MM, Hall SD, Mohutsky MA, Taylor LS. Mechanistic understanding of the phase behavior of supersaturated solutions of poorly water-soluble drugs. Int J Pharm 2018; 543:29-37. [PMID: 29572154 DOI: 10.1016/j.ijpharm.2018.03.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/16/2018] [Accepted: 03/19/2018] [Indexed: 11/27/2022]
Abstract
Amorphous solid dispersions (ASDs) are a promising formulation strategy to increase both the apparent aqueous solubility and bioavailability of poorly water-soluble drugs. Upon dissolution under nonsink conditions, ASDs can generate highly supersaturated drug solutions which can undergo liquid-liquid phase separation (LLPS) and/or crystallization. In this study, the phase behavior of supersaturated solutions generated by antisolvent addition and upon the dissolution of ASDs was evaluated using fluorescence lifetime measurements and several other orthogonal techniques, including steady-state fluorescence spectroscopy, ultraviolet (UV) extinction and concentration profiles, ultracentrifuge measurements and nanoparticle tracking analysis. Ritonavir and lopinavir were chosen as poorly water-soluble model drugs, and the polymer, Kollidon VA64, was selected to form the dispersions. The fluorescence lifetime of the environment-sensitive fluoroprobe, PRODAN, was monitored to determine the occurrence of LLPS and crystallization. It was found that only the 10% w/w drug loading ASDs dissolved to a concentration in solution higher than the LLPS concentration and this led to an increase in the lifetime of PRODAN due to partitioning of the fluoroprobe into the drug-rich phase. In contrast, the 50% w/w drug loading ASDs did not reach the amorphous solubility, pointing to a dissolution behavior controlled by the low water solubility and high hydrophobicity of the drug. Fluorescence lifetime measurements were demonstrated to be extremely useful for the characterization of the phase behavior of supersaturated solutions of poorly water-soluble drugs.
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Affiliation(s)
- Francesco Tres
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, IN 47907, United States
| | - Maria M Posada
- Department of Drug Disposition, Lilly Research Laboratories, Eli Lilly and Co., Indianapolis, IN 46225, United States
| | - Stephen D Hall
- Department of Drug Disposition, Lilly Research Laboratories, Eli Lilly and Co., Indianapolis, IN 46225, United States
| | - Michael A Mohutsky
- Department of Drug Disposition, Lilly Research Laboratories, Eli Lilly and Co., Indianapolis, IN 46225, United States
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, IN 47907, United States.
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Cao J, Yang B, Wang Y, Wei C, Wang H, Li S. Polymer brush hexadecyltrimethylammonium bromide (CTAB) modified poly (propylene-g-styrene sulphonic acid) fiber (ZB-1): CTAB/ZB-1 as a promising strategy for improving the dissolution and physical stability of poorly water-soluble drugs. Mater Sci Eng C Mater Biol Appl 2017; 80:282-295. [PMID: 28866166 DOI: 10.1016/j.msec.2017.05.139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 05/23/2017] [Accepted: 05/28/2017] [Indexed: 01/17/2023]
Abstract
The feasibility of polymer brush as drug delivery vehicle was demonstrated with the goal of improving the dissolution and physical stability of poorly water-soluble drugs. Polymer brush CTAB/ZB-1 was synthesized by electrostatic interaction using a physical modification method with anionic poly (propylene-g-styrene sulphonic acid) fiber (ZB-1) as the substrate and cationic hexadecyltrimethylammonium bromide (CTAB) as the modifier. The polymer brush structure of CTAB/ZB-1 was validated by atomic force microscopy (AFM) and the channels of brush provided the drug loading sites. Flurbiprofen (FP), a BCS class II representative drug, was selected as the model poorly water-soluble drug to be loaded into this polymer brush. Then the drug loading and release were systematically investigated. Besides, the transformation from crystalline FP to amorphous state was observed by differential scanning calorimeter (DSC). In vitro dissolution in pure water and pH1.2 HCl media with/without 0.1% sodium dodecyl sulfate (SDS) was tested. Moreover, the optimal formulations (namely carrier/drug ratios) were determined. The results demonstrated prominent improvement of dissolution when FP was released from CTAB/ZB-1. After a long time storage, FP remained amorphous in CTAB/ZB-1 according to DSC determinations and performed an approximately equivalent dissolution compared with fresh samples, suggesting the advantage of CTAB/ZB-1 as carrier in enhancing the physical stability of drugs. The study introduced the versatile easily formulated polymer brush CTAB/ZB-1 and demonstrated the potential of polymer brush as an alternative approach for improving the dissolution and physical stability of poorly water-soluble drugs.
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Affiliation(s)
- Jinxu Cao
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning, PR China
| | - Baixue Yang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning, PR China
| | - Yumei Wang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning, PR China
| | - Chen Wei
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning, PR China
| | - Hongyu Wang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning, PR China
| | - Sanming Li
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, Liaoning, PR China.
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33
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Maleki A, Kettiger H, Schoubben A, Rosenholm JM, Ambrogi V, Hamidi M. Mesoporous silica materials: From physico-chemical properties to enhanced dissolution of poorly water-soluble drugs. J Control Release 2017; 262:329-347. [PMID: 28778479 DOI: 10.1016/j.jconrel.2017.07.047] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 06/24/2017] [Accepted: 07/31/2017] [Indexed: 12/20/2022]
Abstract
New approaches in pharmaceutical chemistry have resulted in more complex drug molecules in the quest to achieve higher affinity to their targets. However, these 'highly active' drugs can also suffer from poor water solubility. Hence, poorly water soluble drugs became a major challenge in drug formulation, and this problem is increasing, as currently about 40 of the marketed drugs and 90% of drug candidates are classified as poorly water soluble. Various approaches exist to circumvent poor water solubility and poor dissolution rate in aqueous environment, however, each having disadvantages and certain limitations. Recently, mesoporous silica materials (MSMs) have been proposed to be used as matrices for enhancing the apparent solubility and dissolution rate of different drug molecules. MSMs are ideal candidates for this purpose, as silica is a "generally regarded as safe" (GRAS) material, is biodegradable, and can be readily surface-modified in order to optimize drug loading and subsequent release in the human body. The major advantage of mesoporous silica as drug delivery systems (DDSs) for poorly water soluble drugs lies in their pore size, pore morphology, and versatility in alteration of the surface groups, which can result in optimized interactions between a drug candidate and MSM carrier by modifying the pore surfaces. Furthermore, the drug of interest can be loaded into these pores in a preferably amorphous state, which can increase the drug dissolution properties dramatically. The highlights of this review include a critical discussion about the modification of the physico-chemical properties of MSMs and how these physico-chemical modifications influence the drug loading and the subsequent dissolution of poorly water soluble drugs. It aims to further promote the use of MSMs as alternative strategy to common methods like solubility enhancement by cyclodextrins, micronization, or microemulsion techniques. This review can provide guidance on how to tailor MSMs to achieve optimized drug loading and drug dissolution.
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Affiliation(s)
- Aziz Maleki
- Zanjan Pharmaceutical Nanotechnology Research Center (ZPNRC), Zanjan University of Medical Sciences, Zanjan, Iran
| | - Helene Kettiger
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6A, FI-20520 Turku, Finland
| | - Aurélie Schoubben
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy
| | - Jessica M Rosenholm
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6A, FI-20520 Turku, Finland.
| | - Valeria Ambrogi
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy.
| | - Mehrdad Hamidi
- Zanjan Pharmaceutical Nanotechnology Research Center (ZPNRC), Zanjan University of Medical Sciences, Zanjan, Iran.
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34
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Dening TJ, Rao S, Thomas N, Prestidge CA. Montmorillonite-lipid hybrid carriers for ionizable and neutral poorly water-soluble drugs: Formulation, characterization and in vitro lipolysis studies. Int J Pharm 2017; 526:95-105. [PMID: 28456653 DOI: 10.1016/j.ijpharm.2017.04.063] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 04/23/2017] [Accepted: 04/25/2017] [Indexed: 11/21/2022]
Abstract
Lipid-based formulations (LBFs) are a popular strategy for enhancing the gastrointestinal solubilization and absorption of poorly water-soluble drugs. In light of this, montmorillonite-lipid hybrid (MLH) particles, composed of medium-chain triglycerides, lecithin and montmorillonite clay platelets, have been developed as a novel solid-state LBF. Owing to the unique charge properties of montmorillonite, whereby the clay platelet surfaces carry a permanent negative charge and the platelet edges carry a pH-dependent charge, three model poorly water-soluble drugs with different charge properties; blonanserin (weak base, pKa 7.7), ibuprofen (weak acid, pKa 4.5) and fenofibrate (neutral), were formulated as MLH particles and their performance during biorelevant in vitro lipolysis at pH 7.5 was investigated. For blonanserin, drug solubilization during in vitro lipolysis was significantly reduced 3.4-fold and 3.2-fold for MLH particles in comparison to a control lipid solution and silica-lipid hybrid (SLH) particles, respectively. It was hypothesized that strong electrostatic interactions between the anionic montmorillonite platelet surfaces and cationic blonanserin molecules were responsible for the inferior performance of MLH particles. In contrast, no significant influence on drug solubilization was observed for ibuprofen- and fenofibrate-loaded MLH particles. The results of the current study indicate that whilst MLH particles are a promising novel formulation strategy for poorly water-soluble drugs, drug ionization tendency and the potential for drug-clay interactions must be taken into consideration to ensure an appropriate performance.
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Lu M, Xing H, Jiang J, Chen X, Yang T, Wang D, Ding P. Liquisolid technique and its applications in pharmaceutics. Asian J Pharm Sci 2016; 12:115-123. [PMID: 32104320 PMCID: PMC7032177 DOI: 10.1016/j.ajps.2016.09.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 09/11/2016] [Accepted: 09/27/2016] [Indexed: 12/01/2022] Open
Abstract
Most of the newly developed drug candidates are lipophilic and poorly water-soluble. Enhancing the dissolution and bioavailability of these drugs is a major challenge for the pharmaceutical industry. Liquisolid technique, which is based on the conversion of the drug in liquid state into an apparently dry, non-adherent, free flowing and compressible powder, is a novel and advanced approach to tackle the issue. The objective of this article is to present an overview of liquisolid technique and summarize the progress of its applications in pharmaceutics. Low cost, simple processing and great potentials in industrial production are main advantages of this approach. In addition to the enhancement of dissolution rate of poorly water-soluble drugs, this technique is also a fairly new technique to effectively retard drug release. Furthermore, liquisolid technique has been investigated as a tool to minimize the effect of pH variation on drug release and as a promising alternative to conventional coating for the improvement of drug photostability in solid dosage forms. Overall, liquisolid technique is a newly developed and promising tool for enhancing drug dissolution and sustaining drug release, and its potential applications in pharmaceutics are still being broadened.
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Affiliation(s)
- Mei Lu
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Haonan Xing
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Jingzheng Jiang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Xiao Chen
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Tianzhi Yang
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, Husson University, Bangor, ME, USA
| | - Dongkai Wang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Pingtian Ding
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
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Gautschi N, Van Hoogevest P, Kuentz M. Molecular insights into the formation of drug-monoacyl phosphatidylcholine solid dispersions for oral delivery. Eur J Pharm Sci 2017; 108:93-100. [PMID: 27240778 DOI: 10.1016/j.ejps.2016.05.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 04/13/2016] [Accepted: 05/25/2016] [Indexed: 11/24/2022]
Abstract
Phospholipid-based formulations provide a key technology to formulate poorly water-soluble drugs. A recent interest has been in using phospholipids with a high content of monoacyl phosphatidylcholine (monoacyl PC) due to its ability to form mixed micelles of mono- and di-acylphospholipids upon aqueous dispersion. The present work focused on binary drug- monoacyl PC systems (at about equimolar ratio) with respect to screening of solid dispersion feasibility. It was tested whether or not a molecular rule of thumb can predict the desirable absence of drug crystallinity in the products. Subsequently, molecular simulations were performed to gain a better understanding of molecular association between drugs and monoacyl PC. Finally, the glass-forming ability (GFA) of pure drugs was considered with respect to solid dispersion formation. All products were obtained from a solvent-evaporation process and subsequent analysis of potential drug crystallinity was measured with X-ray powder diffraction and differential scanning calorimetry. Molecular simulations were making use of a Monte Carlo algorithm and molecular properties relevant for GFA were calculated. As a result, the dataset of 28 drugs confirmed an earlier proposed empirical rule that enthalpy of fusion and logP were important for solid dispersion formation, while some relevance was also evidenced for drug energies of frontal orbitals. Interestingly, the Monte Carlo simulations revealed several likely associations between drug and phospholipid rather than a well-defined single complex formation. However, drug-excipient interactions were still pivotal, since GFA of pure drug could not predict solid dispersion formation. These findings led to important molecular insights into binary solid dispersions of drug and monoacyl PC, which can guide formulators in early drug product development.
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Đorđević SM, Cekić ND, Savić MM, Isailović TM, Ranđelović DV, Marković BD, Savić SR, Timić Stamenić T, Daniels R, Savić SD. Parenteral nanoemulsions as promising carriers for brain delivery of risperidone: Design, characterization and in vivo pharmacokinetic evaluation. Int J Pharm 2015. [PMID: 26209070 DOI: 10.1016/j.ijpharm.2015.07.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
This paper describes design and evaluation of parenteral lecithin-based nanoemulsions intended for brain delivery of risperidone, a poorly water-soluble psychopharmacological drug. The nanoemulsions were prepared through cold/hot high pressure homogenization and characterized regarding droplet size, polydispersity, surface charge, morphology, drug-vehicle interactions, and physical stability. To estimate the simultaneous influence of nanoemulsion formulation and preparation parameters--co-emulsifier type, aqueous phase type, homogenization temperature--on the critical quality attributes of developed nanoemulsions, a general factorial experimental design was applied. From the established design space and stability data, promising risperidone-loaded nanoemulsions (mean size about 160 nm, size distribution <0.15, zeta potential around -50 mV), containing sodium oleate in the aqueous phase and polysorbate 80, poloxamer 188 or Solutol(®) HS15 as co-emulsifier, were produced by hot homogenization and their ability to improve risperidone delivery to the brain was assessed in rats. Pharmacokinetic study demonstrated erratic brain profiles of risperidone following intraperitoneal administration in selected nanoemulsions, most probably due to their different droplet surface properties (different composition of the stabilizing layer). Namely, polysorbate 80-costabilized nanoemulsion showed increased (1.4-7.4-fold higher) risperidone brain availability compared to other nanoemulsions and drug solution, suggesting this nanoemulsion as a promising carrier worth exploring further for brain targeting.
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Affiliation(s)
- Sanela M Đorđević
- Department of Pharmaceutical Technology and Cosmetology, Faculty of Pharmacy, University of Belgrade, Belgrade 11221, Serbia
| | - Nebojša D Cekić
- Faculty of Technology, University of Niš, Leskovac 16000, Serbia; DCP Hemigal, Leskovac 16000, Serbia
| | - Miroslav M Savić
- Department of Pharmacology, Faculty of Pharmacy, University of Belgrade, Belgrade 11221, Serbia
| | - Tanja M Isailović
- Department of Pharmaceutical Technology and Cosmetology, Faculty of Pharmacy, University of Belgrade, Belgrade 11221, Serbia
| | - Danijela V Ranđelović
- ICTM-Institute of Microelectronic Technologies, University of Belgrade, Belgrade 11000, Serbia
| | - Bojan D Marković
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Belgrade, Belgrade 11221, Serbia
| | - Saša R Savić
- Faculty of Technology, University of Niš, Leskovac 16000, Serbia
| | - Tamara Timić Stamenić
- Department of Pharmacology, Faculty of Pharmacy, University of Belgrade, Belgrade 11221, Serbia
| | - Rolf Daniels
- Institut für Pharmazeutische Technologie, Eberhard-Karls Universität Tübingen, Tübingen, Germany
| | - Snežana D Savić
- Department of Pharmaceutical Technology and Cosmetology, Faculty of Pharmacy, University of Belgrade, Belgrade 11221, Serbia.
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Tajiri T, Morita S, Sakamoto R, Mimura H, Ozaki Y, Reppas C, Kitamura S. Developing dissolution testing methodologies for extended-release oral dosage forms with supersaturating properties. Case example: Solid dispersion matrix of indomethacin. Int J Pharm 2015; 490:368-74. [PMID: 26022889 DOI: 10.1016/j.ijpharm.2015.05.054] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 05/19/2015] [Accepted: 05/20/2015] [Indexed: 11/17/2022]
Abstract
The objective of this study was to develop an in vitro dissolution test method with discrimination ability for an extended-release solid dispersion matrix of a lipophilic drug using the United States Pharmacopeia (USP) Apparatus 4, flow-through cell apparatus. In the open-loop configuration, the sink condition was maintained by manipulating the flow rate of the dissolution medium. To evaluate the testing conditions, the drug release mechanism from an extended-release solid dispersion matrix containing hydrophobic and hydrophilic polymers was investigated. As the hydroxypropyl methylcellulose (HPMC) maintained concentrations of indomethacin higher than the solubility in a dissolution medium, the release of HPMC into the dissolution medium was also quantified using size-exclusion chromatography. We concluded that the USP Apparatus 4 is suitable for application to an in vitro dissolution method for orally administered extended-release solid dispersion matrix formulations containing poorly water-soluble drugs.
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Affiliation(s)
- Tomokazu Tajiri
- CTM Manufacturing, Astellas Pharma Europe B.V., Leiden 2333 BE, The Netherlands.
| | - Shigeaki Morita
- Department of Engineering Science, Osaka Electro-Communication University, Neyagawa, Osaka 572-8530, Japan
| | - Ryosaku Sakamoto
- Analytical Research Laboratories, Astellas Pharma Inc., Yaizu, Shizuoka 425-0072, Japan
| | - Hisahi Mimura
- Analytical Research Laboratories, Astellas Pharma Inc., Yaizu, Shizuoka 425-0072, Japan
| | - Yukihiro Ozaki
- Department of Chemistry, School of Science and Technology, Kwansei-Gakuin University, Sanda, Hyogo 669-1337, Japan
| | - Christos Reppas
- Faculty of Pharmacy, National & Kapodistrian University of Athens, Panepistimiopolis, 157 71 Zografou, Greece
| | - Satoshi Kitamura
- Technology Planning & Administration Strategic Planning, Astellas Pharma Inc., Chuo, Tokyo 103-8411, Japan
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Thiry J, Krier F, Evrard B. A review of pharmaceutical extrusion: critical process parameters and scaling-up. Int J Pharm 2014; 479:227-40. [PMID: 25541517 DOI: 10.1016/j.ijpharm.2014.12.036] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 12/15/2014] [Accepted: 12/16/2014] [Indexed: 11/30/2022]
Abstract
Hot melt extrusion has been a widely used process in the pharmaceutical area for three decades. In this field, it is important to optimize the formulation in order to meet specific requirements. However, the process parameters of the extruder should be as much investigated as the formulation since they have a major impact on the final product characteristics. Moreover, a design space should be defined in order to obtain the expected product within the defined limits. This gives some freedom to operate as long as the processing parameters stay within the limits of the design space. Those limits can be investigated by varying randomly the process parameters but it is recommended to use design of experiments. An examination of the literature is reported in this review to summarize the impact of the variation of the process parameters on the final product properties. Indeed, the homogeneity of the mixing, the state of the drug (crystalline or amorphous), the dissolution rate, the residence time, can be influenced by variations in the process parameters. In particular, the impact of the following process parameters: temperature, screw design, screw speed and feeding, on the final product, has been reviewed.
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Affiliation(s)
- J Thiry
- University of Liege (ULg), Department of Pharmacy, CIRM, Laboratory of Pharmaceutical Technology and Biopharmacy, CHU, Avenue de l'Hopital 1, B36, B-4000 Liege, Belgium.
| | - F Krier
- University of Liege (ULg), Department of Pharmacy, CIRM, Laboratory of Pharmaceutical Technology and Biopharmacy, CHU, Avenue de l'Hopital 1, B36, B-4000 Liege, Belgium
| | - B Evrard
- University of Liege (ULg), Department of Pharmacy, CIRM, Laboratory of Pharmaceutical Technology and Biopharmacy, CHU, Avenue de l'Hopital 1, B36, B-4000 Liege, Belgium
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40
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Fussell AL, Mah PT, Offerhaus H, Niemi SM, Salonen J, Santos HA, Strachan C. Coherent anti-Stokes Raman scattering microscopy driving the future of loaded mesoporous silica imaging. Acta Biomater 2014; 10:4870-7. [PMID: 25064000 DOI: 10.1016/j.actbio.2014.07.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 06/16/2014] [Accepted: 07/18/2014] [Indexed: 11/22/2022]
Abstract
This study reports the use of variants of coherent anti-Stokes Raman scattering (CARS) microscopy as a novel method for improved physicochemical characterization of drug-loaded silica particles. Ordered mesoporous silica is a biomaterial that can be loaded to carry a number of biochemicals, including poorly water-soluble drugs, by allowing the incorporation of drug into nanometer-sized pores. In this work, the loading of two poorly water-soluble model drugs, itraconazole and griseofulvin, in MCM-41 silica microparticles is characterized qualitatively, using the novel approach of CARS microscopy, which has advantages over other analytical approaches used to date and is non-destructive, rapid, label free, confocal and has chemical and physical specificity. The study investigated the effect of two solvent-based loading methods, namely immersion and rotary evaporation, and microparticle size on the three-dimensional (3-D) distribution of the two loaded drugs. Additionally, hyperspectral CARS microscopy was used to confirm the amorphous nature of the loaded drugs. Z-stacked CARS microscopy suggested that the drug, but not the loading method or particle size range, affected 3-D drug distribution. Hyperspectral CARS confirmed that the drug loaded in the MCM-41 silica microparticles was in an amorphous form. The results show that CARS microscopy and hyperspectral CARS microscopy can be used to provide further insights into the structural nature of loaded mesoporous silica microparticles as biomaterials.
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41
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Liu D, Yu S, Zhu Z, Lyu C, Bai C, Ge H, Yang X, Pan W. Controlled delivery of carvedilol nanosuspension from osmotic pump capsule: in vitro and in vivo evaluation. Int J Pharm 2014; 475:496-503. [PMID: 25219321 DOI: 10.1016/j.ijpharm.2014.09.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 08/18/2014] [Accepted: 09/06/2014] [Indexed: 10/24/2022]
Abstract
This study intended to develop a novel controlled delivery osmotic pump capsule of carvedilol nanosuspension. The capsule is assembled using a semi-permeable capsule shell with contents including nanosuspension drying powder, mannitol and Plasdone S-630. The physical characteristics of semi-permeable capsule walls were compared among different coating solutions under different temperature. The composition of the coating solution and drying temperature appeared to be important for the formation of the shells. Carvedilol nanosuspension was prepared by precipitation-ultrasonication technique and was further lyophilized. Response surface methodology was used to investigate the influence of factors on the responses. The optimized formulation displayed complete drug delivery and zero-order release rate. The TEM and particle size analysis indicated that the morphology of the resultant nanoparticle in the capsule was spherical shaped with a mean size of 252±19 nm. The in vivo test in beagle dogs demonstrated that the relative bioavailability of the novel system was 203.5% in comparison to that of the marketed preparation. The capsule successfully controlled the release of carvedilol and the fluctuation of plasma concentration was minimized. The system is a promising strategy to improve the oral bioavailability for poorly soluble drugs and preparing it into elementary osmotic pump conveniently.
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Affiliation(s)
- Dandan Liu
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, PR China; School of Biomedical & Chemical Engineering, Liaoning Institute of Science and Technology, Benxi 117004, PR China.
| | - Shihui Yu
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Zhihong Zhu
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Chunyang Lyu
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Chunping Bai
- School of Biomedical & Chemical Engineering, Liaoning Institute of Science and Technology, Benxi 117004, PR China
| | - Huiqi Ge
- School of Biomedical & Chemical Engineering, Liaoning Institute of Science and Technology, Benxi 117004, PR China
| | - Xinggang Yang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Weisan Pan
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, PR China.
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Lin C, Chen F, Ye T, Zhang L, Zhang W, Liu D, Xiong W, Yang X, Pan W. A novel oral delivery system consisting in "drug-in cyclodextrin-in nanostructured lipid carriers" for poorly water-soluble drug: vinpocetine. Int J Pharm 2014; 465:90-6. [PMID: 24530388 DOI: 10.1016/j.ijpharm.2014.02.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 12/25/2013] [Accepted: 02/08/2014] [Indexed: 10/25/2022]
Abstract
The purpose of this study was to develop a new delivery system based on drug cyclodextrin (CD) complexation and loading into nanostructured lipid carriers (NLC) to improve the oral bioavailability of vinpocetine (VP). Three different CDs and three different methods to obtain solid vinpocetine-cyclodextrin-tartaric acid complexes (VP-CD-TA) were contrasted. The co-evaporation vinpocetine-β-cyclodextrin-tartaric acid loaded NLC (VP-β-CD-TA COE-loaded NLC) was obtained by emulsification ultrasonic dispersion method. VP-β-CD-TA COE-loaded NLC was suitably characterized for particle size, polydispersity index, zeta potential, entrapment efficiency and the morphology. The crystallization of drug in VP-CD-TA and NLC was investigated by differential scanning calorimetry (DSC). The in vitro release study was carried out at pH 1.2, pH 6.8 and pH 7.4 medium. New Zealand rabbits were applied to investigate the pharmacokinetic behavior in vivo. The VP-β-CD-TA COE-loaded NLC presented a superior physicochemical property and selected to further study. In the in vitro release study, VP-β-CD-TA COE-loaded NLC exhibited a higher dissolution rate in the pH 6.8 and pH 7.4 medium than VP suspension and VP-NLC. The relative bioavailability of VP-β-CD-TA COE-loaded NLC was 592% compared with VP suspension and 92% higher than VP-NLC. In conclusion, the new formulation significantly improved bioavailability of VP for oral delivery, demonstrated a perspective way for oral delivery of poorly water-soluble drugs.
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Affiliation(s)
- Congcong Lin
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 10016, China
| | - Fen Chen
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 10016, China
| | - Tiantian Ye
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 10016, China
| | - Lina Zhang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 10016, China
| | - Wenji Zhang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 10016, China
| | - Dandan Liu
- School of Biomedical & Chemical Engineering, Liaoning Institute of Science and Technology, 176 Xianghuai Road, Benxi 117004, China
| | - Wei Xiong
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 10016, China
| | - Xinggang Yang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 10016, China
| | - Weisan Pan
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 10016, China.
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43
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Tran PHL, Tran TTD, Lee BJ. Enhanced solubility and modified release of poorly water-soluble drugs via self-assembled gelatin-oleic acid nanoparticles. Int J Pharm 2013; 455:235-40. [PMID: 23876500 DOI: 10.1016/j.ijpharm.2013.07.025] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 07/07/2013] [Indexed: 12/19/2022]
Abstract
Recently, we synthesized novel amphiphilic gelatin-oleic acid (GO) conjugate to prepare self-assembled nanoparticles for drug delivery. The aim of this study was to investigate pharmaceutical potentialities of self-assembled GO nanoparticles for solubility enhancement and modified release of poorly water-soluble drugs. Three poorly water-soluble model drugs with different pH-dependent solubility (valsartan and aceclofenac, insoluble at pH 1.2; telmisartan, insoluble at pH 6.8) were chosen to investigate the potential contributions of self-assembled GO nanoparticles to solubility enhancement and controlled release. The particle size of the drug-loaded nanoparticles was 200-250 nm. Zeta potential was calculated, and instrumental analysis such as powder X-ray diffraction (PXRD) and Fourier transform infrared (FT-IR) spectroscopy were used to investigate the physicochemical properties of the drug-loaded nanoparticles. Compared to the drug alone, the drug-loaded nanoparticles showed enhanced solubility. Furthermore, the release profiles of the model drugs were modified in a controlled manner. The current self-assembled GO nanoparticles can provide a versatile potential in drug delivery and tumor targeting.
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Affiliation(s)
- Phuong Ha-Lien Tran
- International University, Vietnam National University - Ho Chi Minh City, Viet Nam
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44
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Zhang Y, Zhi Z, Li X, Gao J, Song Y. Carboxylated mesoporous carbon microparticles as new approach to improve the oral bioavailability of poorly water-soluble carvedilol. Int J Pharm 2013; 454:403-11. [PMID: 23850816 DOI: 10.1016/j.ijpharm.2013.07.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2013] [Revised: 06/05/2013] [Accepted: 07/03/2013] [Indexed: 12/20/2022]
Abstract
The main objective of this study was to develop carboxylated ordered mesoporous carbon microparticles (c-MCMs) loaded with a poorly water-soluble drug, intended to be orally administered, able to enhance the drug loading capacity and improve the oral bioavailability. A model drug, carvedilol (CAR), was loaded onto c-MCMs via a procedure involving a combination of adsorption equilibrium and solvent evaporation. The physicochemical properties of the drug-loaded composites were systematically studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption, powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC) and HPLC. It was found that c-MCM has a high drug loading level up to 41.6%, and higher than that of the mesoporous silica template. Incorporation of CAR in both drug carriers enhanced the solubility and dissolution rate of the drug, compared to the pure crystalline drug. After loading CAR into c-MCMs, its oral bioavailability was compared with the marketed product in dogs. The results showed that the bioavailability of CAR was improved 179.3% compared with that of the commercial product when c-MCM was used as the drug carrier. We believe that the present study will help in the design of oral drug delivery systems for enhanced oral bioavailability of poorly water-soluble drugs.
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Affiliation(s)
- Yanzhuo Zhang
- Department of Pharmaceutics, Xuzhou Medical College, Xuzhou 221004, PR China.
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45
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Brough C, Williams RO. Amorphous solid dispersions and nano-crystal technologies for poorly water-soluble drug delivery. Int J Pharm 2013; 453:157-66. [PMID: 23751341 DOI: 10.1016/j.ijpharm.2013.05.061] [Citation(s) in RCA: 177] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 05/27/2013] [Accepted: 05/28/2013] [Indexed: 10/26/2022]
Abstract
Poor water-solubility is a common characteristic of drug candidates in pharmaceutical development pipelines today. Various processes have been developed to increase the solubility, dissolution rate and bioavailability of these active ingredients belonging to BCS II and IV classifications. Over the last decade, nano-crystal delivery forms and amorphous solid dispersions have become well established in commercially available products and industry literature. This article is a comparative analysis of these two methodologies primarily for orally delivered medicaments. The thermodynamic and kinetic theories relative to these technologies are presented along with marketed product evaluations and a survey of commercial relevant scientific literature.
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Affiliation(s)
- Chris Brough
- Division of Pharmaceutics, College of Pharmacy, The University of Texas at Austin, 1 University Station, Campus Mail Code A1902, Austin, TX 78712, United States.
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