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Figueiredo J, Mendes M, Pais A, Sousa J, Vitorino C. Microfluidics-on-a-chip for designing celecoxib-based amorphous solid dispersions: when the process shapes the product. Drug Deliv Transl Res 2024:10.1007/s13346-024-01633-7. [PMID: 38861140 DOI: 10.1007/s13346-024-01633-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/13/2024] [Indexed: 06/12/2024]
Abstract
The fundamental idea underlying the use of amorphous solid dispersions (ASDs) is to make the most of the solubility advantage of the amorphous form of a drug. However, the drug stability becomes compromised due to the higher free energy and disorder of molecular packing in the amorphous phase, leading to crystallization. Polymers are used as a matrix to form a stable homogeneous amorphous system to overcome the stability concern. The present work aims to design ASD-based formulations under the umbrella of quality by design principles for improving oral drug bioavailability, using celecoxib (CXB) as a model drug. ASDs were prepared from selected polymers and tested both individually and in combinations, using various manufacturing techniques: high-shear homogenization, high-pressure homogenization, microfluidics-on-a-chip, and spray drying. The resulting dispersions were further optimized, resorting to a 32 full-factorial design, considering the drug:polymers ratio and the total solid content as variables. The formulated products were evaluated regarding analytical centrifugation and the influence of the different polymers on the intrinsic dissolution rate of the CXB-ASDs. Microfluidics-on-a-chip led to the amorphous status of the formulation. The in vitro evaluation demonstrated a remarkable 26-fold enhancement in the intrinsic dissolution rate, and the translation of this formulation into tablets as the final dosage form is consistent with the observed performance enhancement. These findings are supported by ex vivo assays, which exhibited a two-fold increase in permeability compared to pure CXB. This study tackles the bioavailability hurdles encountered with diverse active compounds, offering insights into the development of more effective drug delivery platforms.
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Affiliation(s)
- Joana Figueiredo
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
| | - Maria Mendes
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
- Coimbra Chemistry Centre, Institute of Molecular Sciences - IMS, Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal
| | - Alberto Pais
- Coimbra Chemistry Centre, Institute of Molecular Sciences - IMS, Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal
| | - João Sousa
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
- Coimbra Chemistry Centre, Institute of Molecular Sciences - IMS, Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal
| | - Carla Vitorino
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal.
- Coimbra Chemistry Centre, Institute of Molecular Sciences - IMS, Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal.
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Wdowiak K, Tajber L, Miklaszewski A, Cielecka-Piontek J. Sweeteners Show a Plasticizing Effect on PVP K30-A Solution for the Hot-Melt Extrusion of Fixed-Dose Amorphous Curcumin-Hesperetin Solid Dispersions. Pharmaceutics 2024; 16:659. [PMID: 38794322 PMCID: PMC11124940 DOI: 10.3390/pharmaceutics16050659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/08/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024] Open
Abstract
The co-administration of curcumin and hesperetin might be beneficial in terms of neuroprotective activity; therefore, in this study, we attempted to develop a fixed-dose formulation comprising these two compounds in an amorphous state. The aim of obtaining an amorphous state was to overcome the limitations of the low solubility of the active compounds. First, we assessed the possibility of using popular sweeteners (erythritol, xylitol, and sorbitol) as plasticizers to reduce the glass transition temperature of PVP K30 to prepare the polymer-excipient blends, which allowed the preparation of amorphous solid dispersions via hot-melt extrusion at a temperature below the original glass transition of PVP K30. Erythritol proved to be the superior plasticizer. Then, we focused on the development of fixed-dose amorphous solid dispersions of curcumin and hesperetin. Powder X-ray diffraction and thermal analysis confirmed the amorphous character of dispersions, whereas infrared spectroscopy helped to assess the presence of intermolecular interactions. The amorphous state of the produced dispersions was maintained for 6 months, as shown in a stability study. Pharmaceutical parameters such as dissolution rate, solubility, and in vitro permeability through artificial membranes were evaluated. The best improvement in these features was noted for the dispersion, which contained 15% of the total content of the active compounds with erythritol used as the plasticizer.
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Affiliation(s)
- Kamil Wdowiak
- Department of Pharmacognosy and Biomaterials, Poznan University of Medical Sciences, 3 Rokietnicka St., 60-806 Poznan, Poland;
| | - Lidia Tajber
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, University of Dublin, D02 PN40 Dublin, Ireland;
| | - Andrzej Miklaszewski
- Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawla II 24, 61-138 Poznan, Poland;
| | - Judyta Cielecka-Piontek
- Department of Pharmacognosy and Biomaterials, Poznan University of Medical Sciences, 3 Rokietnicka St., 60-806 Poznan, Poland;
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3
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Yoshikawa E, Ueda K, Hakata R, Higashi K, Moribe K. Quantitative Investigation of Intestinal Drug Absorption Enhancement by Drug-Rich Nanodroplets Generated via Liquid-Liquid Phase Separation. Mol Pharm 2024; 21:1745-1755. [PMID: 38501717 DOI: 10.1021/acs.molpharmaceut.3c01078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Drug-rich droplets formed through liquid-liquid phase separation (LLPS) have the potential to enhance the oral absorption of drugs. This can be attributed to the diffusion of these droplets into the unstirred water layer (UWL) of the gastrointestinal tract and their reservoir effects on maintaining drug supersaturation. However, a quantitative understanding of the effect of drug-rich droplets on intestinal drug absorption is still lacking. In this study, the enhancement of intestinal drug absorption through the formation of drug-rich droplets was quantitatively evaluated on a mechanistic basis. To obtain fenofibrate (FFB)-rich droplets, an amorphous solid dispersion (ASD) of FFB/hypromellose (HPMC) was dispersed in an aqueous medium. Physicochemical characterization confirmed the presence of nanosized FFB-rich droplets in the supercooled liquid state within the FFB/HPMC ASD dispersion. An in situ single-pass intestinal perfusion (SPIP) assay in rats demonstrated that increased quantities of FFB-rich nanodroplets enhanced the intestinal absorption of FFB. The effective diffusion of FFB-rich nanodroplets through UWL would partially contribute to the improved FFB absorption. Additionally, confocal laser scanning microscopy (CLSM) of cross sections of the rat intestine after the administration of fluorescently labeled FFB-rich nanodroplets showed that these nanodroplets were directly taken up by small intestinal epithelial cells. Therefore, the direct uptake of drug-rich nanodroplets by the small intestine is a potential mechanism for improving FFB absorption in the intestine. To quantitatively evaluate the impact of FFB-rich droplets on the FFB absorption enhancement, we determined the apparent permeabilities of the FFB-rich nanodroplets and dissolved FFB based on the SPIP results. The apparent permeability of the FFB-rich nanodroplets was 110-130 times lower than that of dissolved FFB. However, when the FFB-rich nanodroplet concentration was several hundred times higher than that of dissolved FFB, the FFB-rich nanodroplets contributed significantly to FFB absorption improvement. The present study highlights that drug-rich nanodroplets play a direct role in enhancing drug absorption in the gastrointestinal tract, indicating their potential for further improvement of oral absorption from ASD formulations.
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Affiliation(s)
- Etsushi Yoshikawa
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Keisuke Ueda
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Rei Hakata
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Kenjirou Higashi
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Kunikazu Moribe
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
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4
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Fine-Shamir N, Dahan A. Ethanol-based solubility-enabling oral drug formulation development: Accounting for the solubility-permeability interplay. Int J Pharm 2024; 653:123893. [PMID: 38346600 DOI: 10.1016/j.ijpharm.2024.123893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/06/2024] [Accepted: 02/07/2024] [Indexed: 02/19/2024]
Abstract
The aim of the current work was to investigate the key factors that govern the success/failure of an ethanol-based solubility-enabling oral drug formulation, including the effects of the ethanol on the solubility of the drug, the permeability across the intestinal membrane, the drug's dissolution in the aqueous milieu of the gastrointestinal tract (GIT), and the resulting solubility-permeability interplay. The concentration-dependent effects of ethanol-based vehicles on the solubility, the in-vitro Caco-2 permeability, the in-vivo rat permeability, and the biorelevant dissolution of the BCS class II antiepileptic drug carbamazepine were studied, and a predictive model describing the solubility-permeability relationship was developed. Significant concentration-dependent solubility increase of CBZ was obtained with increasing ethanol levels, that was accompanied by permeability decrease, both in Caco-2 and in rat perfusion studies, demonstrating a tradeoff between the increased solubility afforded by the ethanol and a concomitant permeability decrease. When ethanol absorption was accounted for, an excellent agreement was achieved between the predicted permeability and the experimental data. Biorelevant dissolution studies revealed that minimal ethanol levels of 30 % and 50 % were needed to fully dissolve 1 and 5 mg CBZ dose respectively, with no drug precipitation.In conclusion, key factors to be accounted for when developing ethanol-based formulation include the drug's solubility, permeability, the solubility-permeability interplay, and the drug dose intended to be delivered. Only the minimal amount of ethanol sufficient to solubilize the drug dose throughout the GIT should be used, and not more than that, to avoid unnecessarily permeability loss, and to maximize overall drug absorption.
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Affiliation(s)
- Noa Fine-Shamir
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
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5
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Fine-Shamir N, Dahan A. Solubility-enabling formulations for oral delivery of lipophilic drugs: considering the solubility-permeability interplay for accelerated formulation development. Expert Opin Drug Deliv 2024; 21:13-29. [PMID: 38124383 DOI: 10.1080/17425247.2023.2298247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 12/19/2023] [Indexed: 12/23/2023]
Abstract
INTRODUCTION Tackling low water solubility of drug candidates is a major challenge in today's pharmaceutics/biopharmaceutics, especially by means of modern solubility-enabling formulations. However, drug absorption from these formulations oftentimes remains unchanged or even decreases, despite substantial solubility enhancement. AREAS COVERED In this article, we overview the simultaneous effects of the formulation on the solubility and the apparent permeability of the drug, and analyze the contribution of this solubility-permeability interplay to the success/failure of the formulation to increase the overall absorption and bioavailability. Three different patterns of interplay were identified: (1) solubility-permeability tradeoff in which every solubility gain comes with a price of concomitant permeability loss; (2) an advantageous interplay pattern in which the permeability remains unchanged alongside the solubility gain; and (3) an optimal interplay pattern in which the formulation increases both the solubility and the permeability. Passive vs. active intestinal permeability considerations in the context of the solubility-permeability interplay are also thoroughly discussed. EXPERT OPINION The solubility-permeability interplay pattern of a given formulation has a critical effect on its overall success/failure, and hence, taking into account both parameters in solubility-enabling formulation development is prudent and highly recommended.
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Affiliation(s)
- Noa Fine-Shamir
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Uma Maheswari RT, Ajithkumar V, Varalakshmi P, Rajan M. CD44 tagged hyaluronic acid - chitosan liposome carrier for the delivery of berberine and doxorubicin into lung cancer cells. Int J Biol Macromol 2023; 253:126599. [PMID: 37652327 DOI: 10.1016/j.ijbiomac.2023.126599] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 08/23/2023] [Accepted: 08/27/2023] [Indexed: 09/02/2023]
Abstract
Liposomes are unique biomolecular, capable of loading both hydrophilic and hydrophobic molecules and delivered into the biological system. Liposomes (L) coated with hyaluronic acid (HA) and chitosan (CS) carrier system was fabricated. Berberine (BER) and doxorubicin (DOX) were encapsulated to enhance drug proliferation and therapeutic effect in lung cancer cells. The FTIR, XRD, SEM, and TEM techniques were carried out for functional group identification, crystallinity, and surface morphology analysis, respectively. In-vitro drug release confirms the sustained release of BER and DOX in various physiological environments. HA-CS@BER&DOX-L has good penetration ability and higher cytotoxicity effect in the A549 cells, and the IC50 value of HA-CS@BER&DOX-L is 89.19 μg/300 μL. The pure liposome showed a negligible cytotoxicity effect, and the HA-CS@BER&DOX-L could efficiently induce the apoptosis of A549 cells. The cellular uptake analysis of the HA-CS@BER&DOX-L effectively targeted and entered the A549 cells and clearly observed C. elegans images. Hence, the proposed system will be a potential treatment methodology to enhance the cytotoxicity of the A549 cancer cells and be useful to future drug administration methodology development.
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Affiliation(s)
- Ramakrishna Thilagar Uma Maheswari
- Biomaterials in Medicinal Chemistry Laboratory, Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
| | - Velmurugan Ajithkumar
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
| | - Perumal Varalakshmi
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
| | - Mariappan Rajan
- Biomaterials in Medicinal Chemistry Laboratory, Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India.
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7
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Choudhari M, Damle S, Saha RN, Dubey SK, Singhvi G. Emerging Applications of Hydroxypropyl Methylcellulose Acetate Succinate: Different Aspects in Drug Delivery and Its Commercial Potential. AAPS PharmSciTech 2023; 24:188. [PMID: 37715004 DOI: 10.1208/s12249-023-02645-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 08/23/2023] [Indexed: 09/17/2023] Open
Abstract
Hydroxypropyl methylcellulose acetate succinate (HPMCAS) has multi-disciplinary applications spanning across the development of drug delivery systems, in 3D printing, and in tissue engineering, etc. HPMCAS helps in maintaining the drug in a super-saturated condition by inhibiting its precipitation, thereby increasing the rate and extent of dissolution in the aqueous media. HPMCAS has several distinctive characteristics, such as being amphiphilic in nature, having an ionization pH, and a succinyl and acetyl substitution ratio, all of which are beneficial while developing formulations. This review provides insights regarding the various types of formulations being developed using HPMCAS, including amorphous solid dispersion (ASD), amorphous nanoparticles, dry coating, and 3D printing, along with their applicability in drug delivery and biomedical fields. Furthermore, HPMCAS, compared with other carbohydrate polymers, shows several benefits in drug delivery, including proficiency in imparting stable ASD with a high dissolution rate, being easily processable, and enhancing bioavailability. The various commercially available formulations, regulatory considerations, and key patents containing the HPMCAS have been discussed in this review.
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Affiliation(s)
- Manisha Choudhari
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Vidya Vihar, Pilani Campus, Rajasthan, 333031, India
| | - Shantanu Damle
- Colorcon Asia Pvt. Ltd. Verna Industrial Estate, Verna, Goa, 403722, India
| | - Ranendra Narayan Saha
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Vidya Vihar, Pilani Campus, Rajasthan, 333031, India
| | - Sunil Kumar Dubey
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Vidya Vihar, Pilani Campus, Rajasthan, 333031, India.
- R&D Healthcare Emami Ltd., Belgharia, Kolkata, 700056, India.
| | - Gautam Singhvi
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Vidya Vihar, Pilani Campus, Rajasthan, 333031, India.
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Wu H, Wang Z, Zhao Y, Gao Y, Wang L, Zhang H, Bu R, Ding Z, Han J. Effect of Different Seed Crystals on the Supersaturation State of Ritonavir Tablets Prepared by Hot-Melt Extrusion. Eur J Pharm Sci 2023; 185:106440. [PMID: 37004961 DOI: 10.1016/j.ejps.2023.106440] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/10/2023] [Accepted: 03/30/2023] [Indexed: 04/03/2023]
Abstract
Hot-melt extrusion (HME) is a technology increasingly common for the commercial production of pharmaceutical amorphous solid dispersions (ASDs), especially for poorly water-soluble active pharmaceutical ingredients (APIs). However, recrystallization of the APIs during dissolution must be prevented to maintain the supersaturation state enabled by ASD. Unfortunately, the amorphous formulation may be contaminated by seed crystals during the HME manufacturing process, which could lead to undesirable crystal growth during the dissolution process. In this study, the dissolution behavior of ritonavir ASD tablets prepared using both Form I and Form II polymorphs was examined, and the effects of different seed crystals on crystal growth rates were investigated. The aim was to understand how the presence of seed crystals can impact the dissolution of ritonavir, and to determine the optimal polymorph and seeding conditions for the production of ASDs. The results showed that both Form I and Form II ritonavir tablets had similar dissolution profiles, which were also similar to the reference listed drug (RLD). However, it was observed that the presence of seed crystals, particularly the metastable Form I seed, led to more precipitation compared to the stable Form II seed in all formulations. The Form I crystals that precipitated from the supersaturated solution were easily dispersed in the solution and could serve as seeds to facilitate crystal growth. On the other hand, Form II crystals tended to grow more slowly and presented as aggregates. The addition of both Form I and Form II seeds could affect their precipitation behaviors, and the amount and form of the seeds had significant effects on the precipitation process of the RLD tablets, as are the tablets prepared with different polymorphs. In conclusion, the study highlights the importance of minimizing the contamination risk of seed crystals during the manufacturing process and selecting the appropriate polymorph for the production of ASDs.
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Andrews GP, Qian K, Jacobs E, Jones DS, Tian Y. High drug loading nanosized amorphous solid dispersion (NASD) with enhanced in vitro solubility and permeability: Benchmarking conventional ASD. Int J Pharm 2023; 632:122551. [PMID: 36581107 DOI: 10.1016/j.ijpharm.2022.122551] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/06/2022] [Accepted: 12/23/2022] [Indexed: 12/27/2022]
Abstract
Through liquid-liquid phase separation (LLPS), it is possible to generate drug-rich nanoparticles during the dissolution of conventional amorphous solid dispersions (ASDs). These self-generated nanoparticles may improve the oral absorption of poorly water-soluble drugs by enhancing the drug's apparent solubility and effective membrane permeability. However, due to the high concentration threshold required for LLPS, conventional ASDs that can consistently generate drug-rich nanoparticles during dissolution are rare. More importantly, the quality of these meta-stable drug-rich nanoparticles is hard to control during dissolution, leading to inconsistency in formulation performances. This work has described a continuous twin-screw extrusion process capable of producing nanosized ASD (NASD) formulations that can offer better solubility and permeability enhancements over conventional ASD formulations. Two polymeric carriers, polyvinylpyrrolidone-co-vinyl acetate (PVPVA) and hydroxypropyl methylcellulose acetate succinate (HPMCAS), with a model hydrophobic drug celecoxib (BCS II), were formulated into both ASD and NASD formulations. Compared to the conventional ASD formulation, the prefabricated NASD (sizes ranging between 40 and 200 nm) embedded within a polyol matrix can be rapidly dispersed into a nanoparticle suspension in the presence of aqueous media. The resulting NASDs achieved drug loadings up to 80 % w/w and a maximum of 98 % encapsulation efficiency. Because of the TSE platform's high drug-loading capacity and high scalability, the developed method may be useful for continuously producing personalized nanomedicines.
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Affiliation(s)
- Gavin P Andrews
- School of Pharmacy, Queen's University Belfast, BT9 7BL, United Kingdom
| | - Kaijie Qian
- School of Pharmacy, Queen's University Belfast, BT9 7BL, United Kingdom
| | - Esther Jacobs
- School of Pharmacy, Queen's University Belfast, BT9 7BL, United Kingdom
| | - David S Jones
- School of Pharmacy, Queen's University Belfast, BT9 7BL, United Kingdom
| | - Yiwei Tian
- School of Pharmacy, Queen's University Belfast, BT9 7BL, United Kingdom.
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Fan Y, Castleberry S. High-throughput kinetic turbidity analysis for determination of amorphous solubility and excipient screening for amorphous solid dispersions. Int J Pharm 2023; 631:122495. [PMID: 36526147 DOI: 10.1016/j.ijpharm.2022.122495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 12/06/2022] [Accepted: 12/11/2022] [Indexed: 12/15/2022]
Abstract
Many poorly water-soluble active pharmaceutical ingredients (APIs) rely on supersaturating formulations, such as amorphous solid dispersions (ASDs), to enhance oral bioavailability. ASDs kinetically trap amorphous solid drugs within polymer excipient matrices to maintain the amorphous drug states. The maximum solution concentration of the API in these formulations is known as the amorphous solubility. In early drug development with scarce material and time, high-throughput approaches to measuring amorphous solubility and screening excipient effects on crystallization risk offer significant benefits to preclinical formulation scientists. Here, we developed a high-throughput screening (HTS) workflow to quantify amorphous solubility and screen ASD excipients by automated kinetic turbidity analysis. Testing 20 model APIs with a wide range of biorelevant solubility, we demonstrated their apparent amorphous solubility determined by the HTS approach strongly correlated with quantification results using conventional liquid chromatography; while the real-time analysis significantly saved analytical time and experimental efforts. Furthermore, kinetic turbidity profiles elucidated distinct excipient effects on the precipitation process of APIs. These results were successfully translated to dissolution and precipitation behaviors of ASD formulations composed of the tested polymers. The high-throughput kinetic turbidity workflow presents a facile and information-rich approach for amorphous solubility screenings against excipients, and helps guide enabling formulation development.
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Affiliation(s)
- Yuchen Fan
- Small Molecule Pharmaceutical Sciences, Research and Early Development, Genentech Inc. 1 DNA Way, South San Francisco, CA 94080, USA
| | - Steven Castleberry
- Small Molecule Pharmaceutical Sciences, Research and Early Development, Genentech Inc. 1 DNA Way, South San Francisco, CA 94080, USA.
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11
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Wang Y, Wang W, Yu E, Zhuang W, Sun X, Wang H, Li Q. Preparation of a camptothecin analog FLQY2 self-micelle solid dispersion with improved solubility and bioavailability. J Nanobiotechnology 2022; 20:402. [PMID: 36064403 PMCID: PMC9446799 DOI: 10.1186/s12951-022-01596-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 07/31/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND 7-p-trifluoromethylphenyl-FL118 (FLQY2) is a camptothecin analog with excellent antitumor efficacy against various solid tumors. However, its poor solubility and low bioavailability limited the development of the drug. Polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer (Soluplus®), an emerging carrier for preparing solid dispersion (SD), encapsulated FLQY2 to circumvent the above limitations. RESULTS In this project, FLQY2-SD was prepared by solvent evaporation method and self-assembled into micelles in aqueous solutions owing to the amphiphilic nature of Soluplus®. The physicochemical characterizations demonstrated that FLQY2 existed in a homogeneous amorphous form in SD and was rapidly dissolved. The micelles did not affect cytotoxicity or cellular uptake of FLQY2 in vitro, and the oral bioavailability was increased by 12.3-fold compared to the FLQY2 cyclodextrin suspension. The pharmacokinetics of FLQY2-SD showed rapid absorption, accumulation in the intestine, and slow elimination via fecal. Metabolite identification studies showed 14 novel metabolites were identified, including 12 phase I metabolites (M1-M12) and 2 phase II metabolites (M13-M14), of which M2 (oxidation after decarboxylation) and M7 (dioxolane ring cleavage) were the primary metabolites in the positive mode and negative mode, respectively. The tumor growth inhibition rate (TGI, 81.1%) of FLQY2-SD (1.5 mpk, p.o./QW) in tumor-bearing mice after oral administration was higher than that of albumin-bound Paclitaxel (15 mpk, i.v./Q4D) and Irinotecan hydrochloride (100 mpk, i.p./QW). CONCLUSIONS The successful preparation, pharmacokinetics, and pharmacodynamics studies of FLQY2-SD showed that the solubility and bioavailability of FLQY2 were improved, which facilitated the further druggability development of FLQY2.
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Affiliation(s)
- Yi Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, No. 1 Gongda Road, Hangzhou, 313000, People's Republic of China
| | - Wenchao Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, No. 1 Gongda Road, Hangzhou, 313000, People's Republic of China
| | - Endian Yu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, No. 1 Gongda Road, Hangzhou, 313000, People's Republic of China
| | - Wenya Zhuang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, No. 1 Gongda Road, Hangzhou, 313000, People's Republic of China
| | - Xuanrong Sun
- College of Pharmaceutical Sciences, Zhejiang University of Technology, No. 1 Gongda Road, Hangzhou, 313000, People's Republic of China
| | - Hong Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, No. 1 Gongda Road, Hangzhou, 313000, People's Republic of China
| | - Qingyong Li
- College of Pharmaceutical Sciences, Zhejiang University of Technology, No. 1 Gongda Road, Hangzhou, 313000, People's Republic of China.
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Martinez MN, Sinko B, Wu F, Flanagan T, Borbás E, Tsakalozou E, Giacomini KM. A Critical Overview of the Biological Effects of Excipients (Part I): Impact on Gastrointestinal Absorption. AAPS J 2022; 24:60. [DOI: 10.1208/s12248-022-00711-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 04/16/2022] [Indexed: 02/07/2023] Open
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13
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Indulkar AS, Lou X, Zhang GGZ, Taylor LS. Role of Surfactants on Release Performance of Amorphous Solid Dispersions of Ritonavir and Copovidone. Pharm Res 2022; 39:381-397. [PMID: 35169959 DOI: 10.1007/s11095-022-03183-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 01/26/2022] [Indexed: 02/06/2023]
Abstract
PURPOSE To understand the role of different surfactants, incorporated into amorphous solid dispersions (ASDs) of ritonavir and copovidone, in terms of their impact on release, phase behavior and stabilization of amorphous precipitates formed following drug release. METHODS Ternary ASDs with ritonavir, copovidone and surfactants (30:70:5 w/w/w) were prepared by rotary evaporation. ASD release performance was tested using Wood's intrinsic dissolution rate apparatus and compared to the binary drug-polymer ASD with 30% drug loading. Size measurement of amorphous droplets was performed using dynamic light scattering. Solid state characterization was performed using attenuated total reflectance-infrared spectroscopy, differential scanning calorimetry and scanning electron microscopy. RESULTS All surfactant-containing ASDs showed improvement over the binary ASD. Span 85 and D-α-tocopheryl polyethylene glycol succinate (TPGS) showed complete release with no evidence of AAPS or crystallization whereas Span 20 and Tween 80 showed < 50% release with amorphous amorphous phase separation (AAPS). Span 20 also induced solution crystallization. Sodium dodecyl sulfate (SDS) showed very rapid, albeit incomplete (~ 80%) release. AAPS was not observed with SDS. However, crystallization on the dissolving solid surface was noted. Span 20 and TPGS formed the smallest and most size-stable droplets with ~ 1 µm size whereas coalescence was noted with other surfactants. CONCLUSIONS Surfactants improved the release performance relative to the binary ASD. Different surfactant types impacted overall performance to varying extents and affected different attributes. Overall, Span 85 showed best performance (complete release, no crystallization/AAPS and small droplet size). Correlation between physicochemical properties and surfactant performance was not observed.
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Affiliation(s)
- Anura S Indulkar
- Drug Product Development, Research and Development, AbbVie Inc., N Waukegan Road, North Chicago, IL, 60064, USA
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN, 47907, USA
| | - Xiaochun Lou
- Drug Product Development, Research and Development, AbbVie Inc., N Waukegan Road, North Chicago, IL, 60064, USA
| | - Geoff G Z Zhang
- Drug Product Development, Research and Development, AbbVie Inc., N Waukegan Road, North Chicago, IL, 60064, USA.
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN, 47907, USA.
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14
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Bertoni S, Hasa D, Albertini B, Perissutti B, Grassi M, Voinovich D, Passerini N. Better and greener: sustainable pharmaceutical manufacturing technologies for highly bioavailable solid dosage forms. Drug Deliv Transl Res 2022; 12:1843-1858. [PMID: 34988827 DOI: 10.1007/s13346-021-01101-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/29/2021] [Indexed: 11/03/2022]
Abstract
In the last decades, Green Chemistry has been gaining widespread attention within the pharmaceutical field. It is thus very important to bring more sustainable approaches into the design and manufacture of effective oral drug delivery systems. This review focuses on spray congealing and mechanochemical activation, two technologies endorsing different principles of green chemistry, and at the same time, addressing some of the challenges related to the transformation of poorly water-soluble drugs in highly bioavailable solid dosage forms. We therefore present an overview of the basic principles, equipment, and application of these particle-engineering technologies, with specific attention to case studies carried out by the groups working in Italian Universities.
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Affiliation(s)
- Serena Bertoni
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Via S. Donato 19/2, 40127, Bologna, Italy
| | - Dritan Hasa
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Piazzale Europa 1, 34127, Trieste, Italy
| | - Beatrice Albertini
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Via S. Donato 19/2, 40127, Bologna, Italy
| | - Beatrice Perissutti
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Piazzale Europa 1, 34127, Trieste, Italy
| | - Mario Grassi
- Department of Engineering and Architecture, University of Trieste, Via Alfonso Valerio, 6/1, 34127, Trieste, Italy
| | - Dario Voinovich
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Piazzale Europa 1, 34127, Trieste, Italy
| | - Nadia Passerini
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Via S. Donato 19/2, 40127, Bologna, Italy.
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15
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Groёl S, Menzen T, Winter G. Calorimetric Investigation of the Relaxation Phenomena in Amorphous Lyophilized Solids. Pharmaceutics 2021; 13:1735. [PMID: 34684028 PMCID: PMC8538343 DOI: 10.3390/pharmaceutics13101735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/15/2021] [Accepted: 10/15/2021] [Indexed: 11/16/2022] Open
Abstract
Studying the thermal history and relaxation of solid amorphous drug product matrices by calorimetry is a well-known approach, particularly in the context of correlating the matrix parameters with the long-term stability of freeze-dried protein drug products. Such calorimetric investigations are even more relevant today, as the application of new process techniques in freeze-drying (which strongly influence the thermal history of the products) has recently gained more interest. To revive the application of calorimetric methods, the widely scattered knowledge on this matter is condensed into a review and completed with new experimental data. The calorimetric methods are applied to recent techniques in lyophilization, such as controlled nucleation and aggressive/collapse drying. Phenomena such as pre-Tg events in differential scanning calorimetry and aging shoulders in isothermal microcalorimetry are critically reviewed and supplemented with data of freeze-dried products that have not been characterized with these methods before.
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Affiliation(s)
- Sebastian Groёl
- Department of Pharmacy, Ludwig-Maximilians University Munich, 81377 Munich, Germany
| | - Tim Menzen
- Coriolis Pharma Research GmbH, 82152 Munich, Germany;
| | - Gerhard Winter
- Department of Pharmacy, Ludwig-Maximilians University Munich, 81377 Munich, Germany
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16
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Ramachandran G, Sudheesh MS. Role of Permeability on the Biopredictive Dissolution of Amorphous Solid Dispersions. AAPS PharmSciTech 2021; 22:243. [PMID: 34595565 DOI: 10.1208/s12249-021-02125-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 08/23/2021] [Indexed: 02/08/2023] Open
Abstract
An ideal dissolution test for amorphous solid dispersions (ASDs) should reflect physicochemical, physiological, and hydrodynamic conditions which accurately represent in vivo dissolution. However, this is confounded by the evolution of different molecular and colloidal species during dissolution, generating a supersaturated state of the drug. The supersaturated state of a drug is thermodynamically unstable which drives the process of precipitation resulting in a loss of solubility advantage. Maintaining a supersaturated state of the drug with the help of precipitation inhibiting excipients is a key component in the design of ASDs. Therefore, a biopredictive dissolution test is critical for proper risk assessment during the development of an optimal ASD formulation. One of the overlooked components of biopredictive dissolution is the role of drug permeability. The kinetic changes in the phase behavior of a drug during dissolution of ASDs are influenced by drug permeability across a membrane. Conventionally, drug dissolution and permeation are analyzed separately although they occur simultaneously in vivo. The kinetic phase changes occurring during dissolution of ASDs can influence the thermodynamic activity and membrane flux of a drug. The present review evaluates the feasibility, predictability, and practicability of permeability/dissolution for the optimal development and risk assessment of ASD formulations.
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17
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Hate SS, Mosquera-Giraldo LI, Taylor LS. A Mechanistic Study of Drug Mass Transport from Supersaturated Solutions Across PAMPA Membranes. J Pharm Sci 2021; 111:102-115. [PMID: 34237298 DOI: 10.1016/j.xphs.2021.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/30/2021] [Accepted: 07/02/2021] [Indexed: 10/20/2022]
Abstract
There is an increasing shift from dissolution testing to dissolution-permeation testing of formulations during formulation development and this has led increasing application of permeability measurements using parallel artificial membrane permeability assay (PAMPA) membranes. However, there is a lack of thorough analysis of the impact of variabilities in the PAMPA setup on the mass flow rate outcomes, particularly for complex solubility-enabling formulations. In this study, we investigated the impact of amorphous drug-rich nanodroplets, formed in supersaturated solutions by liquid-liquid phase separation, on membrane transport by measuring mass flow rate across PAMPA membranes. In addition, we explored the impact of PAMPA variants such as lipid composition, hydrophobicity and pore size of the filter support, as well as receiver sink properties on membrane mass flow rates of solutions containing amorphous nanodroplets. Filter properties and lipid composition did not show a notable influence on the mass flow rates for lipophilic molecules, while a marked impact was observed for hydrophilic molecules. High sink conditions in the receiver compartment, arising from addition of micellar surfactant, altered the membrane integrity for lipid-impregnated hydrophilic membranes. In contrast, no such effect was observed for a hydrophobic filter support. Membrane integrity tests also suggested that monitoring water transport may be an improved approach over using Lucifer yellow. Furthermore, high sink conditions in the receiver compartment resulted in an increase in the overall mass flow rate. This was due to the effect of asymmetric conditions, generated across the membrane, on mass transport kinetics. Linearity between mass flow rate and donor concentration was observed until the donor concentration reached the amorphous solubility. Above the amorphous solubility, a gradual increase in mass flow rate was observed i.e., with an increasing number of nanodroplets in the solution. This was attributed to decrease in the permeability barrier across unstirred water layer due to reduction of the concentration gradient as nanodroplets dissolved to replenish absorbed drug. Observations made in this study provide insights into the mechanisms associated with mass transport of supersaturated solutions across PAMPA membranes, which are critical for improved evaluation of enabling formulations.
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Affiliation(s)
- Siddhi S Hate
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, IN, United States
| | - Laura I Mosquera-Giraldo
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, IN, United States
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, IN, United States.
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18
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Qian K, Stella L, Jones DS, Andrews GP, Du H, Tian Y. Drug-Rich Phases Induced by Amorphous Solid Dispersion: Arbitrary or Intentional Goal in Oral Drug Delivery? Pharmaceutics 2021; 13:889. [PMID: 34203969 PMCID: PMC8232734 DOI: 10.3390/pharmaceutics13060889] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/08/2021] [Accepted: 06/10/2021] [Indexed: 12/19/2022] Open
Abstract
Among many methods to mitigate the solubility limitations of drug compounds, amorphous solid dispersion (ASD) is considered to be one of the most promising strategies to enhance the dissolution and bioavailability of poorly water-soluble drugs. The enhancement of ASD in the oral absorption of drugs has been mainly attributed to the high apparent drug solubility during the dissolution. In the last decade, with the implementations of new knowledge and advanced analytical techniques, a drug-rich transient metastable phase was frequently highlighted within the supersaturation stage of the ASD dissolution. The extended drug absorption and bioavailability enhancement may be attributed to the metastability of such drug-rich phases. In this paper, we have reviewed (i) the possible theory behind the formation and stabilization of such metastable drug-rich phases, with a focus on non-classical nucleation; (ii) the additional benefits of the ASD-induced drug-rich phases for bioavailability enhancements. It is envisaged that a greater understanding of the non-classical nucleation theory and its application on the ASD design might accelerate the drug product development process in the future.
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Affiliation(s)
- Kaijie Qian
- Pharmaceutical Engineering Group, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (K.Q.); (D.S.J.); (G.P.A.)
| | - Lorenzo Stella
- Atomistic Simulation Centre, School of Mathematics and Physics, Queen’s University Belfast, 7–9 College Park E, Belfast BT7 1PS, UK;
- David Keir Building, School of Chemistry and Chemical Engineering, Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, UK
| | - David S. Jones
- Pharmaceutical Engineering Group, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (K.Q.); (D.S.J.); (G.P.A.)
| | - Gavin P. Andrews
- Pharmaceutical Engineering Group, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (K.Q.); (D.S.J.); (G.P.A.)
- School of Pharmacy, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Huachuan Du
- Laboratory of Applied Mechanobiology, Department of Health Sciences and Technology, ETH Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, 11th floor, Chicago, IL 60611, USA
| | - Yiwei Tian
- Pharmaceutical Engineering Group, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (K.Q.); (D.S.J.); (G.P.A.)
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19
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Ashwathy P, Anto AT, Sudheesh MS. A mechanistic review on the dissolution phase behavior and supersaturation stabilization of amorphous solid dispersions. Drug Dev Ind Pharm 2021; 47:1-11. [PMID: 33494623 DOI: 10.1080/03639045.2021.1879843] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Amorphous solid dispersion (ASD) technology is an attractive formulation approach for poorly soluble drugs because of the supersaturated state acquired during its dissolution. The high thermodynamic activity of the supersaturated state of the drug is also a driver for the enhanced absorptive flux across a membrane. However, this advantage can easily be lost due to the inherent instability of supersaturation, causing drug precipitation. Stabilizing the supersaturated state during the dissolution of ASD for the relevant absorption time frame is a challenging area in formulation research. Stabilizing the supersaturated state by using polymeric excipients and understanding the phase behavior of drugs during dissolution are required for the optimal performance of ASD formulations. A number of confounding kinetic, formulation and physiological factors can influence the evolution of supersaturation and phase changes during dissolution of ASDs. The review highlights the complex nature of dissolution of ASDs and the need of biorelevant dissolution for proper risk assessment and optimizing formulation development.
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Affiliation(s)
- P Ashwathy
- Department of Pharmaceutics, Amrita School of Pharmacy, Kochi, India
| | - Akshaya T Anto
- Department of Pharmaceutics, Amrita School of Pharmacy, Kochi, India
| | - M S Sudheesh
- Department of Pharmaceutics, Amrita School of Pharmacy, Kochi, India
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20
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Fine-Shamir N, Beig A, Dahan A. Adequate formulation approach for oral chemotherapy: Etoposide solubility, permeability, and overall bioavailability from cosolvent- vs. vitamin E TPGS-based delivery systems. Int J Pharm 2021; 597:120295. [PMID: 33497706 DOI: 10.1016/j.ijpharm.2021.120295] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/14/2021] [Accepted: 01/17/2021] [Indexed: 12/13/2022]
Abstract
Injectable-to-oral conversions for anticancer drugs represent an important trend. The goal of this research was to investigate the suitability of formulation approaches for anticancer oral drug delivery, aiming to reveal mechanistic insights that may guide oral chemotherapy development. TPGS vs. PEG-400 were studied as oral formulations for the anticancer drug etoposide, accounting for drug solubility, biorelevant dissolution, permeability, solubility-permeability interplay, and overall bioavailability. Increased etoposide solubility was demonstrated with both excipients. Biorelevant dissolution revealed that TPGS or PEG-400, but not aqueous suspension, allowed complete dissolution of the entire drug dose. Both TPGS and PEG-400 resulted in decreased in-vitro etoposide permeability across artificial membrane, i.e. solubility-permeability tradeoff. While PEG-400 resulted in the same solubility-permeability tradeoff also in-vivo, TPGS showed the opposite trend: the in-vivo permeability of etoposide was markedly increased in the presence of TPGS. This increased permeability was similar to the drug permeability under P-gp inhibition. Rat PK study demonstrated significantly higher etoposide bioavailability from TPGS vs. PEG-400 or suspension (AUC of 72, 41, and 26 µg·min/mL, respectively). All in all, TPGS-based delivery system allows overcoming the solubility-permeability tradeoff, increasing systemic etoposide exposure. Since poor solubility and strong efflux are common to many anticancer agents, this work can aid in the development of better oral delivery approach for chemotherapeutic drugs.
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Affiliation(s)
- Noa Fine-Shamir
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Avital Beig
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
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21
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Kabedev A, Hossain S, Hubert M, Larsson P, Bergström CAS. Molecular Dynamics Simulations Reveal Membrane Interactions for Poorly Water-Soluble Drugs: Impact of Bile Solubilization and Drug Aggregation. J Pharm Sci 2020; 110:176-185. [PMID: 33152373 DOI: 10.1016/j.xphs.2020.10.061] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/14/2020] [Accepted: 10/28/2020] [Indexed: 01/19/2023]
Abstract
Molecular transport mechanisms of poorly soluble hydrophobic drug compounds to lipid membranes were investigated using molecular dynamics (MD) simulations. The model compound danazol was used to investigate the mechanism(s) by which bile micelles delivered it to the membrane. The interactions between lipid membrane and pure drug aggregates-in the form of amorphous aggregates and nanocrystals-were also studied. Our simulations indicate that bile micelles formed in the intestinal fluid may facilitate danazol incorporation into cellular membranes through two different mechanisms. The micelle may be acting as: i) a shuttle that presents the danazol directly to the membrane or ii) an elevator that moves the solubilized danazol with it as the colloidal structure itself becomes incorporated and solubilized within the membrane. The elevator hypothesis was supported by complementary lipid monolayer adsorption experiments. In these experiments, colloidal structures formed with simulated intestinal fluid were observed to rapidly incorporate into the monolayer. Simulations of membrane interaction with drug aggregates showed that both the amorphous aggregates and crystalline nanostructures incorporated into the membrane. However, the amorphous aggregates solubilized more quickly than the nanocrystals into the membrane, thereby improving the danazol absorption.
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Affiliation(s)
- Aleksei Kabedev
- Department of Pharmacy, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
| | - Shakhawath Hossain
- Department of Pharmacy, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
| | - Madlen Hubert
- Department of Pharmacy, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
| | - Per Larsson
- Department of Pharmacy, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden; The Swedish Drug Delivery Center (SweDeliver), Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden
| | - Christel A S Bergström
- Department of Pharmacy, Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden; The Swedish Drug Delivery Center (SweDeliver), Uppsala University, Husargatan 3, 751 23 Uppsala, Sweden.
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22
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Nainwal N, Singh R, Jawla S, Saharan VA. The Solubility-Permeability Interplay for Solubility-Enabling Oral Formulations. Curr Drug Targets 2020; 20:1434-1446. [PMID: 31333138 DOI: 10.2174/1389450120666190717114521] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 06/30/2019] [Accepted: 07/01/2019] [Indexed: 02/01/2023]
Abstract
The Biopharmaceutical classification system (BCS) classifies the drugs based on their intrinsic solubility and intestinal permeability. The drugs with good solubility and intestinal permeability have good bioavailability. The drugs with poor solubility and poor permeability have solubility dependent and permeability dependent bioavailability, respectively. In the current pharmaceutical field, most of the drugs have poor solubility. To solve the problem of poor solubility, various solubility enhancement approaches have been successfully used. The effects of these solubility enhancing approaches on the intestinal permeability of the drugs are a matter of concern, and must not be overlooked. The current review article focuses on the effect of various solubility enhancing approaches viz. cyclodextrin, surfactant, cosolvent, hydrotropes, and amorphous solid dispersion, on the intestinal permeability of drugs. This article will help in the designing of the optimized formulations having balanced solubility enhancement without affecting the permeability of drugs.
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Affiliation(s)
- Nidhi Nainwal
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Sardar Bhagwan Singh University, Balawala, Dehradun, India
| | - Ranjit Singh
- School of Pharmacy, Adarsh Vijendra Institute of Pharmaceutical Sciences, Shobhit University Gangoh, Saharanpur, India
| | - Sunil Jawla
- School of Pharmacy, Adarsh Vijendra Institute of Pharmaceutical Sciences, Shobhit University Gangoh, Saharanpur, India
| | - Vikas Anand Saharan
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Sardar Bhagwan Singh University, Balawala, Dehradun, India
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23
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The solubility, permeability and the dose as key factors in formulation development for oral lipophilic drugs: Maximizing the bioavailability of carbamazepine with a cosolvent-based formulation. Int J Pharm 2020; 582:119307. [PMID: 32276090 DOI: 10.1016/j.ijpharm.2020.119307] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 04/02/2020] [Accepted: 04/03/2020] [Indexed: 02/01/2023]
Abstract
The purpose of this research was to investigate drug dose, solubility, permeability, and their interplay, as key factors in oral formulation development for lipophilic drugs. A PEG400-based formulation was studied for five doses of the lipophilic drug carbamazepine, accounting for biorelevant dissolution of the dose in the GIT, and in-vivo bioavailability in rats. With the three lower doses (10, 25 and 50 mg/kg), complete in-vitro dissolution was achieved and maintained throughout the experiment with this formulation, while significant precipitation was obtained with higher doses (100 and 200 mg/kg). Likewise, the studied formulation allowed complete bioavailability in-vivo with the three lower doses, while the same formulation allowed only 76% and 42% bioavailability for the 100 and 200 mg/kg doses, respectively. There was good correlation between the in-vitro and in-vivo results. In conclusion, this work demonstrates that the dose is a crucial factor in formulation development; while a given formulation may be optimal for a certain drug dose, it may no longer be optimal for higher doses of the same drug. Hence, the solubility, the permeability, and their interplay, have to be considered in light of the drug dose intended to be administered in order to achieve successful oral formulation development.
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24
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Oral andrographolide nanocrystals protect liver from paracetamol induced injury in mice. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2019.101406] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Franco P, De Marco I. Supercritical CO2 adsorption of non-steroidal anti-inflammatory drugs into biopolymer aerogels. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2019.11.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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26
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Borbás E, Kádár S, Tsinman K, Tsinman O, Csicsák D, Takács-Novák K, Völgyi G, Sinkó B, Pataki H. Prediction of Bioequivalence and Food Effect Using Flux- and Solubility-Based Methods. Mol Pharm 2019; 16:4121-4130. [DOI: 10.1021/acs.molpharmaceut.9b00406] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Enikő Borbás
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest H-1111, Hungary
| | - Szabina Kádár
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest H-1111, Hungary
| | | | - Oksana Tsinman
- Pion Inc, Billerica, Massachuesetts 01821, United States
| | - Dóra Csicsák
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest H-1092, Hungary
| | | | - Gergely Völgyi
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest H-1092, Hungary
| | - Bálint Sinkó
- Pion Inc, Billerica, Massachuesetts 01821, United States
| | - Hajnalka Pataki
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest H-1111, Hungary
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27
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Zhang L, Xu C, Mao J, Wang W, Han H, Pu Y, Zhang T. Formulation and Characterization of Novel Dry Suspension and Dry Emulsion of 20(S)-Protopanaxadiol. AAPS PharmSciTech 2019; 20:275. [PMID: 31388863 DOI: 10.1208/s12249-019-1487-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Accepted: 07/19/2019] [Indexed: 12/25/2022] Open
Abstract
To improve the absorption of poorly water-soluble 20(S)-protopanaxadiol (20(S)-PPD), novel 20(S)-PPD-loaded redispersible dry suspension and dry emulsion were developed in this study. 20(S)-PPD dry suspension (PPD-DS) was prepared by enabling drug fully dispersed with suspending agent Avicel CL611 and solubilizer Poloxamer 188. 20(S)-PPD dry emulsion (PPD-DE) was prepared by employing oleic acid as oil phase, Cremophor RH-40 as surfactant, and n-butyl alcohol as co-surfactant. Both PPD-DS and PPD-DE were evaluated for their physicochemical characterization after being dispersed in distilled water. The in vivo pharmacokinetics was evaluated by UPLC-MS/MS. The droplet size of PPD-DS and PPD-DE was in the scope of 1446-1653 nm and 652.8-784.5 nm. The sedimentation volume ratios of PPD-DS and PPD-DE were both at value of 1. The zeta potential of PPD-DS and PPD-DE were from - 53.7 to - 70.4 mV and - 27.5 to - 34.5 mV, respectively, which indicated stable systems. PPD-DS and PPD-DE both achieved dramatically enhanced aqueous solubility and higher perfusion of 20(S)-PPD in rats' intestine. Although statistically, no oral bioavailability enhancements of 20(S)-PPD were achieved in PPD-DE and PPD-DS, there were some improvements in the pharmacokinetic behaviors. Especially, PPD-DS could be a promising drug delivery carrier for 20(S)-PPD with the advantages of long-term stability, dosing flexibility, and the convenience of administering to infants and to those who have difficulty swallowing tablets or capsules.
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28
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Fine-Shamir N, Dahan A. Methacrylate-Copolymer Eudragit EPO as a Solubility-Enabling Excipient for Anionic Drugs: Investigation of Drug Solubility, Intestinal Permeability, and Their Interplay. Mol Pharm 2019; 16:2884-2891. [PMID: 31120762 DOI: 10.1021/acs.molpharmaceut.9b00057] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The purpose of this work was to investigate the use of the dimethylaminoethyl methacrylate-copolymer Eudragit EPO (EPO) in oral solubility-enabling formulations for anionic lipophilic drugs, aiming to guide optional formulation design and maximize oral bioavailability. We have studied the solubility, the permeability, and their interplay, using the low-solubility nonsteroidal anti-inflammatory drug mefenamic acid as a model drug. Then, we studied the biorelevant solubility enhancement of mefenamic acid from EPO-based formulations throughout the gastrointestinal tract (GIT), using the pH-dilution dissolution method. EPO allowed a profound and linear solubility increase of mefenamic acid, from 10 μg/mL without EPO to 9.41 mg/mL in the presence of 7.5% EPO (∼940-fold; 37 °C); however, a concomitant decrease of the drug permeability was obtained, both in vitro and in vivo in rats, indicating a solubility-permeability trade-off. In the absence of an excipient, the unstirred water layer (UWL) adjacent to the GI membrane was found to hinder the permeability of the drug, accounting for this UWL effect and revealing that the true membrane permeability allowed good prediction of the solubility-permeability trade-off as a function of EPO level using a direct relationship between the increased solubility afforded by a given EPO level and the consequent decreased permeability. Biorelevant dissolution studies revealed that EPO levels of 0.05 and 0.1% were insufficient to dissolve mefenamic acid dose during the entire dissolution time course, whereas 0.5 and 1% EPO allowed complete solubility with no drug precipitation. In conclusion, EPO may serve as a potent solubility-enabling excipient for BCS class II/IV acidic drugs; however, it should be used carefully. It is prudent to use the minimal EPO amounts just sufficient to dissolve the drug dose throughout the GIT and not more than that. Excess amounts of EPO provide no solubility gain and cause further permeability loss, jeopardizing the overall success of the formulation. This work may help the formulator to hit the optimal solubility-permeability balance, maximizing the oral bioavailability afforded by the formulation.
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Affiliation(s)
- Noa Fine-Shamir
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences , Ben-Gurion University of the Negev , Beer-Sheva 84105 , Israel
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences , Ben-Gurion University of the Negev , Beer-Sheva 84105 , Israel
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Solanki NG, Lam K, Tahsin M, Gumaste SG, Shah AV, Serajuddin AT. Effects of Surfactants on Itraconazole-HPMCAS Solid Dispersion Prepared by Hot-Melt Extrusion I: Miscibility and Drug Release. J Pharm Sci 2019; 108:1453-1465. [DOI: 10.1016/j.xphs.2018.10.058] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/26/2018] [Accepted: 10/25/2018] [Indexed: 11/30/2022]
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Tsinman K, Tsinman O, Lingamaneni R, Zhu S, Riebesehl B, Grandeury A, Juhnke M, Van Eerdenbrugh B. Ranking Itraconazole Formulations Based on the Flux through Artificial Lipophilic Membrane. Pharm Res 2018; 35:161. [PMID: 29926245 DOI: 10.1007/s11095-018-2440-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 06/05/2018] [Indexed: 11/28/2022]
Abstract
PURPOSE The goal of the study was to evaluate a miniaturized dissolution-permeation apparatus (μFLUX™ apparatus) for its ability to benchmark several itraconazole (ITZ) formulations for which in vivo PK data was available in the literature. METHOD Untreated and micronized powders of ITZ and various enabling formulations of ITZ (commercial Sporanox® solid dispersion, a Soluplus®-based solid dispersion and a nanosuspension) were introduced to the donor compartment of μFLUX™ apparatus. Donor and acceptor chambers were divided from each other by a lipophilic membrane. In addition to the flux evaluations, changes in solid state as a function of time were investigated to gain further insight into the flux changes observed over time for the solid dispersion formulations. RESULTS Initial flux values from Sporanox®, the nanosuspension and the micronized ITZ showed ratios of 52/4/1 with a decreasing flux from nanosuspension and both solid dispersions after 2.5-3 h. Although the initial flux from the Soluplus® formulation was 2.2 times lower than the one observed for Sporanox®, the decrease in flux observed was milder and became ~ 2 times higher than Sporanox® after approximately 2.5 h. The total amounts of ITZ in the receiver compartment after 240 min showed the same rank order as the rodent AUCs of these formulations reported in literature. CONCLUSIONS It was demonstrated that in vitro flux measurements using lipophilic artificial membranes could correctly reproduce the rank order of PK results for ITZ formulations. The drop in flux over time for solid dispersions could be backed by experimental indications of crystallization.
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Affiliation(s)
| | - Oksana Tsinman
- Pion Inc., 10 Cook St, Billerica, Massachusetts, 01821, USA
| | | | - Saijie Zhu
- Technical R&D Shangai Novartis Trading Ltd., Novartis Pharma AG, Shangai, China
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Pangeni R, Choi JU, Panthi VK, Byun Y, Park JW. Enhanced oral absorption of pemetrexed by ion-pairing complex formation with deoxycholic acid derivative and multiple nanoemulsion formulations: preparation, characterization, and in vivo oral bioavailability and anticancer effect. Int J Nanomedicine 2018; 13:3329-3351. [PMID: 29922055 PMCID: PMC5995301 DOI: 10.2147/ijn.s167958] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Objective The current study sought to design an oral delivery system of pemetrexed (PMX), a multitargeted antifolate antimetabolite, by enhancing its intestinal membrane permeability. Materials and methods PMX was ionically complexed with a permeation enhancer such as Nα-deoxycholyl-l-lysyl-methylester (DCK) and prepared as an amorphous solid dispersion by mixing with dispersants such as 2-hydroxypropyl-beta-cyclodextrin (HP-beta-CD) and poloxamer 188 (P188), forming an HP-beta-CD/PMX/DCK/P188; the complex was incorporated into multiple water-in-oil-in-water nanoemulsions in a supersaturated state (HP-beta-CD/PMX/DCK/P188-NE). Results After complex formation, the partition coefficient and in vitro membrane permeability of PMX were markedly increased, but it showed similar cytotoxic and inhibitory effects on cancer cell proliferation/migration. Furthermore, the intestinal membrane permeability and epithelial cell uptake of PMX were synergistically improved after HP-beta-CD/PMX/DCK/P188 was incorporated into a nanoemulsion with a size of 14.5±0.45 nm. The in vitro permeability of HP-beta-CD/PMX/DCK/P188-NE across a Caco-2 cell monolayer was 9.82-fold greater than that of free PMX, which might be attributable to the partitioning of PMX to the epithelial cells being facilitated via specific interaction of DCK with bile acid transporters, as well as the enhanced lipophilicity accompanied by surfactant-induced changes in the intestinal membrane structure and fluidity. Therefore, the oral bioavailability of HP-beta-CD/PMX/DCK/P188-NE in rats was evaluated as 26.8%±2.98% which was 223% higher than that of oral PMX. Moreover, oral HP-beta-CD/PMX/DCK/P188-NE significantly suppressed tumor growth in Lewis lung carcinoma cell-bearing mice, and the tumor volume was maximally inhibited by 61% compared with that in the control group. Conclusion These results imply that HP-beta-CD/PMX/DCK/P188-NE is an effective and promising delivery system for enhancing the oral absorption of PMX. Thus, there is the potential for new medical applications, including applications in metronomic cancer treatment.
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Affiliation(s)
- Rudra Pangeni
- College of Pharmacy and Natural Medicine Research Institute, Mokpo National University, Muan-gun, Jeonnam, Republic of Korea
| | - Jeong Uk Choi
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Vijay Kumar Panthi
- College of Pharmacy and Natural Medicine Research Institute, Mokpo National University, Muan-gun, Jeonnam, Republic of Korea
| | - Youngro Byun
- Department of Molecular Medicine and Biopharmaceutical Science, Graduate School of Convergence Science and Technology, College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Jin Woo Park
- College of Pharmacy and Natural Medicine Research Institute, Mokpo National University, Muan-gun, Jeonnam, Republic of Korea
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Sodhi I, Sangamwar AT. Microarray Plate Method for Estimation of Precipitation Kinetics of Celecoxib under Biorelevant Conditions and Precipitate Characterization. Mol Pharm 2018; 15:2423-2436. [PMID: 29746138 DOI: 10.1021/acs.molpharmaceut.8b00267] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Study methodologies of supersaturated state are fast developing as pharmaceutical industry is adopting supersaturating drug delivery systems (SDDS) to overcome the solubility issue of drugs. The "parachute" of sobriquet "spring-and-parachute", which indicates delayed or slowed intraluminal precipitation of drug from SDDS, is of immense importance to formulation scientists since optimal attainment of "parachute" governs the success of SDDS in stabilizing supersaturated state that ensues in enhancement of bioavailability. The studies carried out so far for precipitation assessments have ignored the stochastic nature of nucleation and lack absolute mathematical approach. In the current study, the supersaturated state has been studied in a quantitative manner through microarray plate method with application of the classical nucleation theory (CNT) equation for determination of precipitation kinetics. This microarray plate method is an attempt to pursue the principle of miniaturization in supersaturation assays and involves comprehensive measurements that allows for accounting of the stochastic nature of nucleation. Overcoming the drawbacks of reproducibility and greater material requirement of existing methods, this study aims to quantify the rate of in vivo precipitation through understanding of precipitation profile of model drug, celecoxib, in biorelevant media. Quantification of nucleation rates was made through CNT using tailored criteria and visually represented through temporal precipitation distribution (TPD) plots. Supersaturation stability was also compared through metastable zone width (MSZW). Optical microscopy helped in visualizing the dynamics of precipitation, while solid state characterization assisted in understanding the nature of obtained precipitates. This study identified the short-lived supersaturation of celecoxib and its tendency to precipitate under fasted conditions, which can be correlated with in vivo behavior for formulation design.
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Affiliation(s)
- Ikjot Sodhi
- Department of Pharmaceutics , National Institute of Pharmaceutical Education and Research , Sector-67 , S.A.S. Nagar , 160062 , Punjab , India
| | - Abhay T Sangamwar
- Department of Pharmaceutics , National Institute of Pharmaceutical Education and Research , Sector-67 , S.A.S. Nagar , 160062 , Punjab , India
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Banda A, Manchanda A, Zhang W, Alba GM, Nagapudi K. Comparative Assessment of Miniaturized Screening Approaches for Selection of Polymers for Amorphous Drug Stabilization. J Pharm Sci 2018; 107:897-908. [DOI: 10.1016/j.xphs.2017.11.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 11/02/2017] [Accepted: 11/07/2017] [Indexed: 12/14/2022]
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Concomitant solubility-permeability increase: Vitamin E TPGS vs. amorphous solid dispersion as oral delivery systems for etoposide. Eur J Pharm Biopharm 2017; 121:97-103. [DOI: 10.1016/j.ejpb.2017.09.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/15/2017] [Accepted: 09/24/2017] [Indexed: 12/24/2022]
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Davis M, Walker G. Recent strategies in spray drying for the enhanced bioavailability of poorly water-soluble drugs. J Control Release 2017; 269:110-127. [PMID: 29117503 DOI: 10.1016/j.jconrel.2017.11.005] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 11/02/2017] [Accepted: 11/03/2017] [Indexed: 01/07/2023]
Abstract
Poorly water-soluble drugs are a significant and ongoing issue for the pharmaceutical industry. An overview of recent developments for the preparation of spray-dried delivery systems is presented. Examples include amorphous solid dispersions, spray dried dispersions, microparticles, nanoparticles, surfactant systems and self-emulsifying drug delivery systems. Several aspects of formulation are considered, such as pre-screening, choosing excipient(s), the effect of polymer structure on performance, formulation optimisation, ternary dispersions, fixed-dose combinations, solvent selection and component miscibility. Process optimisation techniques including nozzle selection are discussed. Comparisons are drawn with other preparation techniques such as hot melt extrusion, freeze drying, milling, electro spinning and film casting. Novel analytical and dissolution techniques for the characterization of amorphous solid dispersions are included. Progress in understanding of amorphous supersaturation or recrystallisation from solution gathered from mechanistic studies is discussed. Aspects of powder flow and compression are considered in a section on downstream processing. Overall, spray drying has a bright future due to its versatility, efficiency and the driving force of poorly soluble drugs.
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Affiliation(s)
- Mark Davis
- Synthesis and Solid State Pharmaceutical Centre (SSPC), Bernal Institute, University of Limerick, Limerick, Ireland.
| | - Gavin Walker
- Bernal Institute, University of Limerick, Limerick, Ireland
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Porat D, Dahan A. Active intestinal drug absorption and the solubility-permeability interplay. Int J Pharm 2017; 537:84-93. [PMID: 29102702 DOI: 10.1016/j.ijpharm.2017.10.058] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 10/30/2017] [Accepted: 10/31/2017] [Indexed: 01/08/2023]
Abstract
The solubility-permeability interplay deals with the question: what is the concomitant effect on the drug's apparent permeability when increasing the apparent solubility with a solubility-enabling formulation? The solubility and the permeability are closely related, exhibit certain interplay between them, and ongoing research throughout the past decade shows that treating the one irrespectively of the other may be insufficient. The aim of this article is to provide an overview of the current knowledge on the solubility-permeability interplay when using solubility-enabling formulations for oral lipophilic drugs, highlighting active permeability aspects. A solubility-enabling formulation may affect the permeability in opposite directions; the passive permeability may decrease as a result of the apparent solubility increase, according to the solubility-permeability tradeoff, but at the same time, certain components of the formulation may inhibit/saturate efflux transporters (when relevant), resulting in significant apparent permeability increase. In these cases, excipients with both solubilizing and e.g. P-gp inhibitory properties may lead to concomitant increase of both the solubility and the permeability. Intelligent development of such formulation will account for the simultaneous effects of the excipients' nature/concentrations on the two arms composing the overall permeability: the passive and the active arms. Overall, thorough mechanistic understanding of the various factors involved in the solubility-permeability interplay may allow developing better solubility-enabling formulations, thereby exploiting the advantages analyzed in this article, offering oral delivery solution even for BCS class IV drugs.
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Affiliation(s)
- Daniel Porat
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
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Fine-Shamir N, Beig A, Zur M, Lindley D, Miller JM, Dahan A. Toward Successful Cyclodextrin Based Solubility-Enabling Formulations for Oral Delivery of Lipophilic Drugs: Solubility–Permeability Trade-Off, Biorelevant Dissolution, and the Unstirred Water Layer. Mol Pharm 2017; 14:2138-2146. [DOI: 10.1021/acs.molpharmaceut.7b00275] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Noa Fine-Shamir
- Department
of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Avital Beig
- Department
of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Moran Zur
- Department
of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - David Lindley
- AbbVie Inc., North Chicago, Illinois 60064, United States
| | | | - Arik Dahan
- Department
of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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Beig A, Fine-Shamir N, Lindley D, Miller JM, Dahan A. Advantageous Solubility-Permeability Interplay When Using Amorphous Solid Dispersion (ASD) Formulation for the BCS Class IV P-gp Substrate Rifaximin: Simultaneous Increase of Both the Solubility and the Permeability. AAPS JOURNAL 2017; 19:806-813. [PMID: 28204967 DOI: 10.1208/s12248-017-0052-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 01/31/2017] [Indexed: 02/08/2023]
Abstract
Rifaximin is a BCS class IV (low-solubility, low-permeability) drug and also a P-gp substrate. The aims of this work were to assess the efficiency of different rifaximin amorphous solid dispersion (ASDs) formulations in achieving and maintaining supersaturation and to investigate the consequent solubility-permeability interplay. Spray-dried rifaximin ASDs were prepared with different hydrophilic polymers and their ability to achieve and maintain supersaturation was assessed. Then, rifaximin's apparent intestinal permeability was investigated as a function of increasing supersaturation both in vitro using the parallel artificial membrane permeability assay (PAMPA) and in vivo using the single-pass rat intestinal perfusion (SPIP) model. The efficiency of the different ASDs to achieve and maintain supersaturation of rifaximin was found to be highly polymer dependent, and the copovidone/HPC-SL formulation was found to be superior to the other two, allowing supersaturation of 200× that of the crystalline solubility for 20 h. In vitro, rifaximin flux was increased and the apparent permeability was constant as a function of increasing supersaturation level. In vivo, on the other hand, absorption rate coefficient (k a) was first constant as a function of increasing supersaturation, but at 250×, the crystalline solubility k a was doubled, similar to the k a in the presence of the strong P-gp inhibitor GF120918. In conclusion, a new and favorable nature of solubility-permeability interplay was revealed in this work: delivering high supersaturation level of the BCS class IV drug rifaximin via ASD, thereby saturating the drugs' P-gp-mediated efflux transport, led to the favorable unique win-win situation, where both the solubility and the permeability increased simultaneously.
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Affiliation(s)
- Avital Beig
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O.Box 653, 84105, Beer-Sheva, Israel
| | - Noa Fine-Shamir
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O.Box 653, 84105, Beer-Sheva, Israel
| | | | - Jonathan M Miller
- AbbVie Inc., North Chicago, Illinois, 60064, USA.,Vertex Pharmaceuticals Inc., 50 Northern Ave, Boston, Massachusetts, 02210, USA
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O.Box 653, 84105, Beer-Sheva, Israel.
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Wu Q, Kennedy MT, Nagapudi K, Kiang YH. Humidity induced phase transformation of poloxamer 188 and its effect on physical stability of amorphous solid dispersion of AMG 579, a PDE10A inhibitor. Int J Pharm 2017; 521:1-7. [PMID: 28163226 DOI: 10.1016/j.ijpharm.2017.01.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 01/10/2017] [Accepted: 01/28/2017] [Indexed: 10/20/2022]
Abstract
Poloxamer 188, a commonly used emulsifying and solubilizing agent, was found to be the cause of crystallization of an investigational drug, AMG 579, from its amorphous solid dispersion at accelerated storage conditions. Investigation of this physical stability issue included thorough characterization of poloxamer 188 at non-ambient conditions. At 40°C, poloxamer 188 becomes deliquescent above relative humidity of 75%. Upon returning to ambient conditions, the deliquescent poloxamer 188 loses water and re-solidifies. The reversible phase transformation of poloxamer 188 may cause physical and chemical stability issues and this risk should be assessed when selecting it as an excipient for formulation development.
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Affiliation(s)
- Qiong Wu
- Process Development, Amgen Inc., One Amgen Center Drive, Thousand Oaks, CA, 91320, United States
| | - Michael T Kennedy
- Process Development, Amgen Inc., One Amgen Center Drive, Thousand Oaks, CA, 91320, United States
| | - Karthik Nagapudi
- Process Development, Amgen Inc., One Amgen Center Drive, Thousand Oaks, CA, 91320, United States
| | - Y-H Kiang
- Process Development, Amgen Inc., One Amgen Center Drive, Thousand Oaks, CA, 91320, United States.
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Barea SA, Mattos CB, Cruz ACC, Chaves VC, Pereira RN, Simões CMO, Kratz JM, Koester LS. Solid dispersions enhance solubility, dissolution, and permeability of thalidomide. Drug Dev Ind Pharm 2016; 43:511-518. [DOI: 10.1080/03639045.2016.1268152] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Silvana A. Barea
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Cristiane B. Mattos
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Ariadne C. C. Cruz
- Programa de Pós-Graduação em Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Vitor C. Chaves
- Programa de Pós-Graduação em Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Rafael N. Pereira
- Programa de Pós-Graduação em Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Claudia M. O. Simões
- Programa de Pós-Graduação em Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Jadel M. Kratz
- Programa de Pós-Graduação em Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Letícia S. Koester
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Beig A, Miller JM, Lindley D, Dahan A. Striking the Optimal Solubility-Permeability Balance in Oral Formulation Development for Lipophilic Drugs: Maximizing Carbamazepine Blood Levels. Mol Pharm 2016; 14:319-327. [PMID: 27981848 DOI: 10.1021/acs.molpharmaceut.6b00967] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The purpose of this research was to investigate the performance of cosolvent based solubility-enabling formulations in oral delivery of lipophilic drugs, accounting for the gastrointestinal tract (GIT) luminal solubilization processes, the solubility-permeability interplay, and the overall in vivo systemic absorption. The poorly soluble antiepileptic agent carbamazepine was formulated in three cosolvent-based formulations: 20%, 60%, and 100% PEG-400, and the apparent solubility and rat permeability of the drug in these formulations were evaluated. The performance of the formulations in the dynamic GIT environment was assessed utilizing the biorelevant pH-dilution method. Then, the overall in vivo drug exposure was investigated following oral administration to rats. The three formulations showed dramatic solubility and permeability differences; the 100% PEG-400 provided the highest solubility enhancement and the 20% the poorest, while the exact opposite was evident from the permeability point of view. The dissolution results indicated that the 20% PEG-400 formulation crashes quickly following oral administration, but both the 60% and the 100% PEG-400 formulations allowed full solubilization of the dose throughout the entire GIT-like journey. The best in vivo performing formulation was the 60% PEG-400 (Fsys > 90%), followed by the 100% PEG-400 (Fsys = 76%), and the 20% PEG-400 formulation (Fsys ≈ 60%). In conclusion, this work demonstrates the in vivo solubility-permeability trade-off in oral delivery of lipophilic drugs; when a solubility-enabling formulation is developed, minimal threshold solubility should be targeted, that is just enough to allow solubilization of the drug dose throughout the GIT, while excess solubilizer should be avoided.
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Affiliation(s)
- Avital Beig
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel
| | - Jonathan M Miller
- AbbVie Incorporation , 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - David Lindley
- AbbVie Incorporation , 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel
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Beig A, Lindley D, Miller JM, Agbaria R, Dahan A. Hydrotropic Solubilization of Lipophilic Drugs for Oral Delivery: The Effects of Urea and Nicotinamide on Carbamazepine Solubility-Permeability Interplay. Front Pharmacol 2016; 7:379. [PMID: 27826241 PMCID: PMC5078674 DOI: 10.3389/fphar.2016.00379] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 09/28/2016] [Indexed: 01/14/2023] Open
Abstract
Hydrotropy refers to increasing the water solubility of otherwise poorly soluble compound by the presence of small organic molecules. While it can certainly increase the apparent solubility of a lipophilic drug, the effect of hydrotropy on the drugs’ permeation through the intestinal membrane has not been studied. The purpose of this work was to investigate the solubility–permeability interplay when using hydrotropic drug solubilization. The concentration-dependent effects of the commonly used hydrotropes urea and nicotinamide, on the solubility and the permeability of the lipophilic antiepileptic drug carbamazepine were studied. Then, the solubility–permeability interplay was mathematically modeled, and was compared to the experimental data. Both hydrotropes allowed significant concentration-dependent carbamazepine solubility increase (up to ∼30-fold). A concomitant permeability decrease was evident both in vitro and in vivo (∼17-fold for nicotinamide and ∼9-fold for urea), revealing a solubility–permeability tradeoff when using hydrotropic drug solubilization. A relatively simplified simulation approach based on proportional opposite correlation between the solubility increase and the permeability decrease at a given hydrotrope concentration allowed excellent prediction of the overall solubility–permeability tradeoff. In conclusion, when using hydrotropic drug solubilization it is prudent to not focus solely on solubility, but to account for the permeability as well; achieving optimal solubility–permeability balance may promote the overall goal of the formulation to maximize oral drug exposure.
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Affiliation(s)
- Avital Beig
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev Beer-Sheva, Israel
| | | | | | - Riad Agbaria
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev Beer-Sheva, Israel
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev Beer-Sheva, Israel
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Zhang P, Zardán Gómez de la Torre T, Welch K, Bergström C, Strømme M. Supersaturation of poorly soluble drugs induced by mesoporous magnesium carbonate. Eur J Pharm Sci 2016; 93:468-74. [DOI: 10.1016/j.ejps.2016.08.059] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 08/25/2016] [Accepted: 08/29/2016] [Indexed: 11/15/2022]
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Amorphous Solid Dispersions or Prodrugs: Complementary Strategies to Increase Drug Absorption. J Pharm Sci 2016; 105:2498-2508. [DOI: 10.1016/j.xphs.2015.11.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Alhayali A, Tavellin S, Velaga S. Dissolution and precipitation behavior of ternary solid dispersions of ezetimibe in biorelevant media. Drug Dev Ind Pharm 2016; 43:79-88. [PMID: 27487184 DOI: 10.1080/03639045.2016.1220566] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The effects of different formulations and processes on inducing and maintaining the supersaturation of ternary solid dispersions of ezetimibe (EZ) in two biorelevant media fasted-state simulated intestinal fluid (FaSSIF) and fasted-state simulated gastric fluid (FaSSGF) at different temperatures (25 °C and 37 °C) were investigated in this work. Ternary solid dispersions of EZ were prepared by adding polymer PVP-K30 and surfactant poloxamer 188 using melt-quenching and spray-drying methods. The resulting solid dispersions were characterized using scanning electron microscopy, differential scanning calorimetry (DSC), modulated DSC, powder X-ray diffraction and Fourier transformation infrared spectroscopy. The dissolution of all the ternary solid dispersions was tested in vitro under non-sink conditions. All the prepared solid dispersions were amorphous in nature. In FaSSIF at 25 °C, the melt-quenched (MQ) solid dispersions of EZ were more soluble than the spray-dried (SD) solid dispersions and supersaturation was maintained. However, at 37 °C, rapid and variable precipitation behavior was observed for all the MQ and SD formulations. In FaSSGF, the melting method resulted in better solubility than the spray-drying method at both temperatures. Ternary solid dispersions show potential for improving solubility and supersaturation. However, powder dissolution experiments of these solid dispersions of EZ at 25 °C may not predict the supersaturation behavior at physiologically relevant temperatures.
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Affiliation(s)
- Amani Alhayali
- a Department of Health Sciences, Division of Medical Sciences , Luleå University of Technology , Lulea , Sweden
| | - Staffan Tavellin
- b Departments of Pharmacology and Clinical Neuroscience , Umea University , Umeå , Sweden
| | - Sitaram Velaga
- a Department of Health Sciences, Division of Medical Sciences , Luleå University of Technology , Lulea , Sweden
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Debotton N, Dahan A. Applications of Polymers as Pharmaceutical Excipients in Solid Oral Dosage Forms. Med Res Rev 2016; 37:52-97. [DOI: 10.1002/med.21403] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 06/07/2016] [Accepted: 06/24/2016] [Indexed: 01/10/2023]
Affiliation(s)
- Nir Debotton
- Department of Chemical Engineering; Shenkar College of Engineering and Design; Ramat-Gan Israel
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences; Ben-Gurion University of the Negev; Beer-Sheva Israel
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Dahan A, Beig A, Lindley D, Miller JM. The solubility-permeability interplay and oral drug formulation design: Two heads are better than one. Adv Drug Deliv Rev 2016; 101:99-107. [PMID: 27129443 DOI: 10.1016/j.addr.2016.04.018] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 04/10/2016] [Accepted: 04/18/2016] [Indexed: 01/23/2023]
Abstract
Poor aqueous solubility is a major challenge in today's biopharmaceutics. While solubility-enabling formulations can significantly increase the apparent solubility of the drug, the concomitant effect on the drug's apparent permeability has been largely overlooked. The mathematical equation to describe the membrane permeability of a drug comprises the membrane/aqueous partition coefficient, which in turn is dependent on the drug's apparent solubility in the GI milieu, suggesting that the solubility and the permeability are closely related, exhibit a certain interplay between them, and treating the one irrespectively of the other may be insufficient. In this article, an overview of this solubility-permeability interplay is provided, and the available data is analyzed in the context of the effort to maximize the overall drug exposure. Overall, depending on the type of solubility-permeability interplay, the permeability may decrease, remain unchanged, and even increase, in a way that may critically affect the formulation capability to improve the overall absorption. Therefore, an intelligent design of solubility-enabling formulation needs to consider both the solubility afforded by the formulation and the permeability in the new luminal environment resulting from the formulation.
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Zhang P, Zardán Gómez de la Torre T, Forsgren J, Bergström CA, Strømme M. Diffusion-Controlled Drug Release From the Mesoporous Magnesium Carbonate Upsalite ®. J Pharm Sci 2016; 105:657-663. [DOI: 10.1002/jps.24553] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/29/2015] [Accepted: 06/02/2015] [Indexed: 11/12/2022]
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Jeon OC, Seo DH, Kim HS, Byun Y, Park JW. Oral delivery of zoledronic acid by non-covalent conjugation with lysine-deoxycholic acid: In vitro characterization and in vivo anti-osteoporotic efficacy in ovariectomized rats. Eur J Pharm Sci 2015; 82:1-10. [PMID: 26542347 DOI: 10.1016/j.ejps.2015.11.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 11/02/2015] [Accepted: 11/02/2015] [Indexed: 10/22/2022]
Abstract
We assessed the possibility of changing the route of administration of zoledronic acid to an oral dosage form and its therapeutic efficacy in an estrogen-deficient osteoporosis rat model. To enhance oral bioavailability, we formed an ionic complex by electrostatic conjugation of zoledronic acid with lysine-linked deoxycholic acid (Lys-DOCA, an oral absorption enhancer). After forming the complex, the characteristic crystalline features of pure zoledronic acid disappeared completely in the powder X-ray diffractogram and differential scanning calorimetry thermogram, indicating that zoledronic acid existed in an amorphous form in the complex. In vitro permeabilities of zoledronic acid/Lys-DOCA (1:1) (ZD1) and zoledronic acid/Lys-DOCA (1:2) (ZD2) complex across Caco-2 cell monolayers were 2.47- and 4.74-fold higher than that of zoledronic acid, respectively. Upon intra-jejunal administration to rats, the intestinal absorption of zoledronic acid was increased significantly and the resulting oral bioavailability of the ZD2 complex was determined to be 6.76±2.59% (0.548±0.161% for zoledronic acid). Ovariectomized (OVX) rats showed 122% increased bone mineral density versus the OVX control at 12weeks after treatment with once weekly oral administration of ZD2 complex (16μg/kg of zoledronic acid). Furthermore, rats treated with ZD2 complex orally showed significant improvement in the parameters of trabecular microarchitecture and bone strength: 149% higher bone volume fraction (BV/TV), 115% higher trabecular number (Tb.N), and 56% higher mean maximum load (Fmax) than in the OVX group. The trabecular microstructure and bone mechanical properties in the oral zoledronic acid group were not significantly changed compared with the OVX control. Thus, the oral ZD2 complex inhibited osteoporosis progression effectively by promoting osteogenesis and trabecular connectivity. The oral ZD2 complex would be expected to improve patient compliance by replacing the conventional injectable form and expand the indications, to include prophylaxis for osteoporosis and bone metastases.
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Affiliation(s)
- Ok-Cheol Jeon
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Dong-Hyun Seo
- Department of Biomedical Engineering, College of Health Science, Yonsei University, Wonju, Gangwon, Republic of Korea; Yonsei-Fraunhofer IZFP Medical Device Lab., Wonju, Gangwon, Republic of Korea
| | - Han-Sung Kim
- Department of Biomedical Engineering, College of Health Science, Yonsei University, Wonju, Gangwon, Republic of Korea; Yonsei-Fraunhofer IZFP Medical Device Lab., Wonju, Gangwon, Republic of Korea
| | - Youngro Byun
- Department of Molecular Medicine and Biopharmaceutical Science, Graduate School of Convergence Science and Technology, College of Pharmacy, Seoul National University, Seoul, Republic of Korea.
| | - Jin Woo Park
- College of Pharmacy and Natural Medicine Research Institute, Mokpo National University, Muan-gun, Jeonnam, Republic of Korea.
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Kamboj S, Sharma R, Singh K, Rana V. Aprepitant loaded solid preconcentrated microemulsion for enhanced bioavailability: A comparison with micronized Aprepitant. Eur J Pharm Sci 2015; 78:90-102. [PMID: 26165621 DOI: 10.1016/j.ejps.2015.07.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 07/06/2015] [Accepted: 07/08/2015] [Indexed: 02/04/2023]
Abstract
Aprepitant (APT) is a lipophilic, poorly water soluble drug with moderate permeability characteristic. Therefore, we aimed to improve solubility as well as permeability that could possibly improve oral bioavailability of APT. For this purpose, Quality by design (QbD) approach employing simplex lattice mixture design was used to prepare solid preconcentrated microemulsion (S-PCM). Further, the software generated numerically optimized S-PCM formulations were developed by utilizing desirability function. The spectral attributes (powder X-ray diffraction, ATR-FTIR, and differential scanning calorimetry) of S-PCM formulations suggested that APT was present in amorphous form. The results of droplet size (150-180 nm), zeta potential (-13 to -15 mV), poly dispersity index (PDI) (0.211-0.238) and emulsification time (<1 min), of these S-PCM formulations (SP1, SP2 and SP3) suggested spherical shape morphology (Transmission electron microscopy) with thermodynamic stability. The comparison of in vitro/ex vivo behavior of S-PCM (SP1) with micronized and non-micronized formulations of APT suggested 2-fold and 5-fold enhancement in solubility and permeability, respectively. This was further evident from pharmacokinetic studies in rabbits that showed 1.5-fold enhancement in bioavailability of S-PCM with respect to micronized APT. Thus, it could be envisaged that development of S-PCM formulation of APT is the best alternative to micronization technology based APT formulations reported earlier.
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Affiliation(s)
- Sunil Kamboj
- Pharmaceutics Division, Dept. of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India
| | - Radhika Sharma
- Pharmaceutics Division, Dept. of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India
| | - Kuldeep Singh
- Pharmaceutics Division, Dept. of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India
| | - Vikas Rana
- Pharmaceutics Division, Dept. of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India.
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