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Wei J, Liang J, Song J, Zhou P. YOLO-PBESW: A Lightweight Deep Learning Model for the Efficient Identification of Indomethacin Crystal Morphologies in Microfluidic Droplets. MICROMACHINES 2024; 15:1136. [PMID: 39337796 PMCID: PMC11433745 DOI: 10.3390/mi15091136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2024] [Revised: 09/04/2024] [Accepted: 09/05/2024] [Indexed: 09/30/2024]
Abstract
Crystallization is important to the pharmaceutical, the chemical, and the materials fields, where the morphology of crystals is one of the key factors affecting the quality of crystallization. High-throughput screening based on microfluidic droplets is a potent technique to accelerate the discovery and development of new crystal morphologies with active pharmaceutical ingredients. However, massive crystal morphologies' datum needs to be identified completely and accurately, which is time-consuming and labor-intensive. Therefore, effective morphologies' detection and small-target tracking are essential for high-efficiency experiments. In this paper, a new improved algorithm YOLOv8 (YOLO-PBESW) for detecting indomethacin crystals with different morphologies is proposed. We enhanced its capability in detecting small targets through the integration of a high-resolution feature layer P2, and the adoption of a BiFPN structure. Additionally, in this paper, adding the EMA mechanism before the P2 detection head was implemented to improve network attention towards global features. Furthermore, we utilized SimSPPF to replace SPPF to mitigate computational costs and reduce inference time. Lastly, the CIoU loss function was substituted with WIoUv3 to improve detection performance. The experimental findings indicate that the enhanced YOLOv8 model attained advancements, achieving AP metrics of 93.3%, 77.6%, 80.2%, and 99.5% for crystal wire, crystal rod, crystal sheet, and jelly-like phases, respectively. The model also achieved a precision of 85.2%, a recall of 83.8%, and an F1 score of 84.5%, with a mAP of 87.6%. In terms of computational efficiency, the model's dimensions and operational efficiency are reported as 5.46 MB, and it took 12.89 ms to process each image with a speed of 77.52 FPS. Compared with state-of-the-art lightweight small object detection models such as the FFCA-YOLO series, our proposed YOLO-PBESW model achieved improvements in detecting indomethacin crystal morphologies, particularly for crystal sheets and crystal rods. The model demonstrated AP values that exceeded L-FFCA-YOLO by 7.4% for crystal sheets and 3.9% for crystal rods, while also delivering a superior F1-score. Furthermore, YOLO-PBESW maintained a lower computational complexity, with parameters of only 11.8 GFLOPs and 2.65 M, and achieved a higher FPS. These outcomes collectively demonstrate that our method achieved a balance between precision and computational speed.
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Affiliation(s)
- Jiehan Wei
- School of Mechatronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China
| | - Jianye Liang
- School of Mechatronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China
| | - Jun Song
- School of Mechatronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China
| | - Peipei Zhou
- School of Mechatronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China
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2
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Liu H, Zhao Y, Sun J. Heterogeneous Nucleation in Protein Crystallization. Biomimetics (Basel) 2023; 8:68. [PMID: 36810399 PMCID: PMC9944892 DOI: 10.3390/biomimetics8010068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 01/26/2023] [Accepted: 02/01/2023] [Indexed: 02/08/2023] Open
Abstract
Protein crystallization was first discovered in the nineteenth century and has been studied for nearly 200 years. Protein crystallization technology has recently been widely used in many fields, such as drug purification and protein structure analysis. The key to successful crystallization of proteins is the nucleation in the protein solution, which can be influenced by many factors, such as the precipitating agent, temperature, solution concentration, pH, etc., among which the role of the precipitating agent is extremely important. In this regard, we summarize the nucleation theory of protein crystallization, including classical nucleation theory, two-step nucleation theory, and heterogeneous nucleation theory. We focus on a variety of efficient heterogeneous nucleating agents and crystallization methods as well. The application of protein crystals in crystallography and biopharmaceutical fields is further discussed. Finally, the bottleneck of protein crystallization and the prospect of future technology development are reviewed.
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Affiliation(s)
- Hao Liu
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yue Zhao
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Jing Sun
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
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Pu S, Hadinoto K. Salting-Out crystallization of glycopeptide Vancomycin: Phase behavior study to control the crystal habit. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Hariyanto P, Myint AA, Kim J. Complete drying and micronization of ecamsule using supercritical CO2 as the antisolvent. J Supercrit Fluids 2021. [DOI: 10.1016/j.supflu.2020.105157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Amirinejad M, Davoodi J, Abbaspour MR, Akhgari A, Hadizadeh F, Badiee A. Preparation, characterization and improved release profile of ibuprofen-phospholipid association. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101951] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Arora D, Sedev R, Beh CC, Priest C, Foster NR. Precipitation of Drug Particles Using a Gas Antisolvent Process on a High-Pressure Microfluidic Platform. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01484] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Deepali Arora
- WA School of Mines—Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA 6102, Australia
| | - Rossen Sedev
- WA School of Mines—Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA 6102, Australia
- Future Industries Institute, University of South Australia, Adelaide, SA 5095, Australia
| | - Chau Chun Beh
- WA School of Mines—Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA 6102, Australia
| | - Craig Priest
- Future Industries Institute, University of South Australia, Adelaide, SA 5095, Australia
| | - Neil R. Foster
- WA School of Mines—Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA 6102, Australia
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7
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Solid-liquid phase equilibrium and thermodynamic analysis of griseofulvin in twelve mono-solvents. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111861] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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8
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Zhao S, Ma Y, Tang W. Thermodynamic analysis and molecular dynamic simulation of solid-liquid phase equilibrium of griseofulvin in three binary solvent systems. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111600] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Lee SY, Abdullah LC, Rahman RA, Abas F, Chong GH. Role of polymers as crystal growth inhibitors in coprecipitation via solution-enhanced dispersion by supercritical fluids (SEDS) to improve andrographolide dissolution from standardized Andrographis paniculata extract. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.01.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Su Y, Xu J, Shi Q, Yu L, Cai T. Polymorphism of griseofulvin: concomitant crystallization from the melt and a single crystal structure of a metastable polymorph with anomalously large thermal expansion. Chem Commun (Camb) 2018; 54:358-361. [DOI: 10.1039/c7cc07744k] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Single crystal structure of the metastable polymorph of griseofulvin with anomalously large thermal expansion.
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Affiliation(s)
- Yuan Su
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing
- China
| | - Jia Xu
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing
- China
| | - Qin Shi
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing
- China
| | - Lian Yu
- School of Pharmacy and Department of Chemistry
- University of Wisconsin
- Madison
- USA
| | - Ting Cai
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing
- China
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11
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Kim DC, Yeo SD. Modification of indomethacin crystals using supercritical and aqueous antisolvent crystallizations. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2015.10.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Mahieu A, Willart JF, Dudognon E, Eddleston MD, Jones W, Danède F, Descamps M. On the Polymorphism of Griseofulvin: Identification of Two Additional Polymorphs. J Pharm Sci 2013; 102:462-8. [DOI: 10.1002/jps.23349] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Revised: 09/27/2012] [Accepted: 10/05/2012] [Indexed: 11/06/2022]
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13
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Elkordy AA, Essa EA, Dhuppad S, Jammigumpula P. Liquisolid technique to enhance and to sustain griseofulvin dissolution: effect of choice of non-volatile liquid vehicles. Int J Pharm 2012; 434:122-32. [PMID: 22677418 DOI: 10.1016/j.ijpharm.2012.05.072] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 05/24/2012] [Accepted: 05/29/2012] [Indexed: 11/18/2022]
Abstract
Liquisolid systems were originally designed to enhance dissolution of hydrophobic drugs. Recently, the same technique was explored to control drug release via hydrophobic carriers. This work aimed to study the effects of different liquid vehicles on release characteristics of griseofulvin as a model hydrophobic drug. Fast dissolution tablets were prepared using three different non-ionic surfactants namely Cremophor(®)EL, Synperonic(®)PE/L61 and Capryol™ 90, on the contrary Kollicoat(®)SR 30D was used for production of grieseofulvin sustained release formulations. Avicel(®) PH102 and Cab-O-Sil(®) M5 were used as carrier and coat materials, respectively. The effect of formulation parameters, such as drug concentration and carrier to coat ratio, on enhancing drug dissolution was explored. Drug concentrations of 20% and 40% (w/w), and R-values (carrier to coat ratio) of 10 and 20 were used. The mathematical model was utilized to formulate liquisolid powder systems. All fast release liquisolid formulations showed higher percentage drug dissolution efficiency (%DE) than conventional directly compacted tablets. Cremophor(®)EL showed the best dissolution enhancement with %DE of about 90%, compared to only 23% for conventional tablets; DSC data suggested loss of griseofulvin crystallinity and thermal behavior. Kollicoat(®) SR 30D retarded the drug release even in the presence of hydrophilic carrier; DSC data suggested that only small fraction of the drug was present in the molecular state within the system. The used liquisolid vehicles showed promise to enhance and to control (depend on the choice of the liquid vehicle) the release of griseofulvin from liquisolid compacts.
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Affiliation(s)
- Amal Ali Elkordy
- University of Sunderland, Department of Pharmacy, Health and Well-being, Sunderland, SR1 3SD, UK.
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Aburahma MH, Abdelbary GA. Novel diphenyl dimethyl bicarboxylate provesicular powders with enhanced hepatocurative activity: Preparation, optimization, in vitro/in vivo evaluation. Int J Pharm 2012; 422:139-50. [DOI: 10.1016/j.ijpharm.2011.10.043] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 09/07/2011] [Accepted: 10/22/2011] [Indexed: 11/29/2022]
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15
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Tanaka Y, Inkyo M, Yumoto R, Nagai J, Takano M, Nagata S. Nanoparticulation of probucol, a poorly water-soluble drug, using a novel wet-milling process to improvein vitrodissolution andin vivooral absorption. Drug Dev Ind Pharm 2011; 38:1015-23. [DOI: 10.3109/03639045.2011.637051] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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16
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Carr AG, Mammucari R, Foster NR. Solubility and Micronization of Griseofulvin in Subcritical Water. Ind Eng Chem Res 2010. [DOI: 10.1021/ie901189r] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Adam G. Carr
- Supercritical Fluids Research group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Raffaella Mammucari
- Supercritical Fluids Research group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Neil R. Foster
- Supercritical Fluids Research group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
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Wong SM, Kellaway IW, Murdan S. Fast-dissolving microparticles fail to show improved oral bioavailability. J Pharm Pharmacol 2010; 58:1319-26. [PMID: 17034654 DOI: 10.1211/jpp.58.10.0004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Oral dosage forms are the preferred means of delivering drugs for systemic absorption. However, development problems occur for drugs with poor water solubility and/or gastrointestinal permeability. It is generally believed that the in-vivo bioavailability of poorly water-soluble drugs from Class II of the Biopharmaceutics Classification System can be improved by increasing the dissolution rate. We have attempted to increase the in-vivo oral bioavailability of a model Class II drug (griseofulvin) by preparing rapidly-dissolving particles. The solvent-diffusion method was used to prepare particles with hydrophilic surfactants (Brij 76/Tween 80 surfactant blend) and in-vivo studies were conducted in rats. The griseofulvin particles produced were bipyramidal in habit with a particle size of 2.18 ± 0.12 mm; they contained crystalline drug and a relatively large proportion (12% w/w) of hydrophilic surfactant. The latter and the small particle size ensured rapid particle dispersion and dissolution in-vitro. Thus, within 30 min of the in-vitro dissolution test, the bipyramidal particles had released ∼70% of drug compared with ∼10% from the starting material (particle size 12.61 ± 1.11 μm). However, the rapid and increased drug dissolution in-vitro was not translated to rapid and enhanced absorption in-vivo, and the oral bioavailability of the model drug was found to be the same from the control and from the bipyramidal particles. The poor in-vivo performance of the bipyramidal particles showed that although the dissolution rate of a Class II drug is thought to be a good indicator of its in-vivo bioavailability, this is not always the case.
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Affiliation(s)
- S M Wong
- Department of Pharmaceutics, School of Pharmacy, London WC1N 1AX, UK
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18
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Kim MS, Kim JS, Hwang SJ. Enhancement of Wettability and Dissolution Properties of Cilostazol Using the Supercritical Antisolvent Process: Effect of Various Additives. Chem Pharm Bull (Tokyo) 2010; 58:230-3. [DOI: 10.1248/cpb.58.230] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Min-Soo Kim
- Center for Nanotechnology-Based New Drug Dosage Form, College of Pharmacy, Chungnam National University
| | - Jeong-Soo Kim
- Center for Nanotechnology-Based New Drug Dosage Form, College of Pharmacy, Chungnam National University
| | - Sung-Joo Hwang
- Center for Nanotechnology-Based New Drug Dosage Form, College of Pharmacy, Chungnam National University
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Development and physicochemical evaluation of pharmacosomes of diclofenac. ACTA PHARMACEUTICA 2009; 59:335-44. [PMID: 19819829 DOI: 10.2478/v10007-009-0023-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Pharmacosomes are amphiphilic lipid vesicular systems that have shown their potential in improving the bioavailability of poorly water soluble as well as poorly lipophilic drugs. Diclofenac is a poorly water soluble drug and also causes gastrointestinal toxicity. To improve the water solublity of diclofenac, its pharmacosomes (phospholipid complex) have been prepared and evaluated for physicochemical analysis. Diclofenac was complexed with phosphatidylcholine (80%) in equimolar ratio, in the presence of dichloromethane, by the conventional solvent evaporation technique. Pharmacosomes thus prepared were evaluated for drug solubility, drug content, surface morphology (by scanning electron microscopy), phase transition behaviour (by differential scanning calorimetry), crystallinity (by X-ray powder diffraction) and in vitro dissolution. Pharmacosomes of diclofenac were found to be irregular or disc shaped with rough surfaces in SEM. Drug content was found to be 96.2 +/- 1.1%. DSC thermograms and XRPD data confirmed the formation of the phospholipid complex. Water solubility of the prepared complex was found to be 22.1 microg mL-1 as compared to 10.5 microg mL-1 of diclofenac. This improvement in water solubility in prepared pharmacosomes may result in improved dissolution and lower gastrointestinal toxicity. Pharmacosomes showed 87.8% while the free diclofenac acid showed a total of only 60.4% drug release at the end of 10 h of dissolution study.
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Dalvi SV, Dave RN. Controlling Particle Size of a Poorly Water-Soluble Drug Using Ultrasound and Stabilizers in Antisolvent Precipitation. Ind Eng Chem Res 2009. [DOI: 10.1021/ie900248f] [Citation(s) in RCA: 159] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sameer V. Dalvi
- Otto H. York Department of Chemical, Biological and Pharmaceutical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102
| | - Rajesh N. Dave
- Otto H. York Department of Chemical, Biological and Pharmaceutical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102
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Wu K, Li J, Wang W, Winstead DA. Formation and characterization of solid dispersions of piroxicam and polyvinylpyrrolidone using spray drying and precipitation with compressed antisolvent. J Pharm Sci 2009; 98:2422-31. [DOI: 10.1002/jps.21598] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Thakur R, Hudgins AE, Goncalves E, Muhrer G. Particle Size and Bulk Powder Flow Control by Supercritical Antisolvent Precipitation. Ind Eng Chem Res 2009. [DOI: 10.1021/ie801324q] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ranjit Thakur
- Novartis Pharma AG, Pharmaceutical and Analytical Development, 4002 Basel, Switzerland
| | - Auburn E. Hudgins
- Novartis Pharma AG, Pharmaceutical and Analytical Development, 4002 Basel, Switzerland
| | - Elisabete Goncalves
- Novartis Pharma AG, Pharmaceutical and Analytical Development, 4002 Basel, Switzerland
| | - Gerhard Muhrer
- Novartis Pharma AG, Pharmaceutical and Analytical Development, 4002 Basel, Switzerland
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Reverchon E, Adami R, Caputo G, De Marco I. Spherical microparticles production by supercritical antisolvent precipitation: Interpretation of results. J Supercrit Fluids 2008. [DOI: 10.1016/j.supflu.2008.06.002] [Citation(s) in RCA: 123] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Moribe K, Tozuka Y, Yamamoto K. Supercritical carbon dioxide processing of active pharmaceutical ingredients for polymorphic control and for complex formation. Adv Drug Deliv Rev 2008; 60:328-38. [PMID: 18006109 DOI: 10.1016/j.addr.2007.03.023] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2006] [Accepted: 03/27/2007] [Indexed: 11/27/2022]
Abstract
Supercritical fluid technique have been exploited in extraction, separation and crystallization processes. In the field of pharmaceutics, supercritical carbon dioxide (scCO(2)) has been used for the purpose of micronization, polymorphic control, and preparation of solid dispersion and complexes. Particle design of active pharmaceutical ingredients is important to make the solid dosage forms with suitable physicochemical properties. Control of the characteristic properties of particles, such as size, shape, crystal structure and morphology is required to optimize the formulation. For solubility enhancement of poorly water-soluble drugs, preparation of the solid dispersion or the complexation with proper drugs or excipients should be a promising approach. This review focuses on aspects of polymorphic control and complexation behavior of active pharmaceutical ingredients by scCO(2) processing.
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Li Y, Yang DJ, Chen SL, Chen SB, Chan ASC. Comparative Physicochemical Characterization of Phospholipids Complex of Puerarin Formulated by Conventional and Supercritical Methods. Pharm Res 2007; 25:563-77. [PMID: 17828444 DOI: 10.1007/s11095-007-9418-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2007] [Accepted: 07/20/2007] [Indexed: 12/17/2022]
Abstract
PURPOSE The aim of this work was to compare the physicochemical characteristics of the phospholipids complex of puerarin (Pur) prepared by traditional methods (solvent evaporation, freeze-drying and micronization) and a supercritical fluid (SCF) technology. The physicochemical properties of the pure drug and the corresponding products prepared by two different SCF methods were also compared. METHODS Solid-state characterization of particles included differential scanning calorimetry (DSC), X-ray powder diffraction (XRPD), solubility, dissolution rate and scanning electron microscopy (SEM) examinations. Besides puerarin phospholipids complex (PPC) by four different methods, the solid-state properties of unprocessed, gas antisolvent (GAS) crystallized and solution enhanced dispersion by supercritical fluid (SEDS) precipitated puerarin samples were also compared. Crystallinity was assessed using DSC and XRPD. Drug-phospholipids interactions were characterized using Fourier transform infrared spectroscopy (FTIR). SEM was used to determine any morphological changes. Pharmaceutical performance was assessed in dissolution rate and solubility tests. RESULT The results of the physical characterization attested a substantial correspondence of the solid state of the drug before and after treatment with GAS technique, whereas a pronounced change in size and morphology of the drug crystals was noticed. The GAS-processed puerarin exhibited a better crystal shape confirmed by DSC, XRPD and IR. Polymorphic change of puerarin during SEDS coupled with the dramatic reduction of the dimensions determined a remarkable enhancement of its solubility and in vitro dissolution rate. Phospholipids complex prepared using supercritical fluid technology showed similar properties of physical state, thermal stability and molecular interaction with phospholipids (PC) to those of corresponding systems prepared by other three conventional methods namely solvent evaporation, freeze-drying and micronization as proved by XRPD, DSC, and FTIR. The best dissolution rate was obtained by SEDS-prepared complex, while the highest solubility was obtained for solvent evaporation method. CONCLUSION Supercritical fluid technology for the preparation of puerarin and its phospholipids complex has been proven to have significant advantages over the solvent evaporation technique and other conventional methods.
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Affiliation(s)
- Ying Li
- Shanghai Jiao Tong University, Shanghai, PR China
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Abstract
Papers and patents that deal with polymorphism (crystal systems for which a substance can exist in structures characterized by different unit cells, but where each of the forms consists of exactly the same elemental composition) and solvatomorphism (systems where the crystal structures of the substance are defined by different unit cells, but where these unit cells differ in their elemental composition through the inclusion of one or molecules of solvent) have been summarized in an annual review. The works cited in this review were published during 2005, and were drawn primarily from the major physical, crystallographic, and pharmaceutical journals. The review is divided into sections that cover articles of general interest, computational and theoretical studies, preparative and isolation methods, structural characterization and properties of polymorphic and solvatomorphic systems, studies of phase transformations, effects associated with secondary processing, and United States patents issued during 2005.
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Affiliation(s)
- Harry G Brittain
- Center for Pharmaceutical Physics, 10 Charles Road, Milford, New Jersey 08848, USA
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Caputo G, Reverchon E. Use of Urea as Habit Modifier in the Supercritical Antisolvent Micronization of Sulfathiazole. Ind Eng Chem Res 2007. [DOI: 10.1021/ie061629z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giuseppe Caputo
- Dipartimento di Ingegneria Chimica e Alimentare, Università di Salerno, Via Ponte don Melillo 1, Fisciano (SA), I-84084, Italy
| | - Ernesto Reverchon
- Dipartimento di Ingegneria Chimica e Alimentare, Università di Salerno, Via Ponte don Melillo 1, Fisciano (SA), I-84084, Italy
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