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Luebbert C, Stoyanov E. Tailored ASD destabilization - Balancing shelf life stability and dissolution performance with hydroxypropyl cellulose. Int J Pharm X 2023; 5:100187. [PMID: 37396620 PMCID: PMC10314205 DOI: 10.1016/j.ijpx.2023.100187] [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: 02/28/2023] [Revised: 05/31/2023] [Accepted: 06/02/2023] [Indexed: 07/04/2023] Open
Abstract
Amorphous solid dispersion (ASD) formulations are preferred enabling formulations for poorly water soluble active pharmaceutical ingredients (API) as they reliably enhance the dissolution behavior and solubility. Balancing a high stability against unwanted transformations such as crystallization and amorphous phase separation during storage on the one hand and optimizing the dissolution behavior of the formulation (high supersaturation and maintenance for long time) on the other hand are essential during formulation development. This study assessed the potential of ternary ASDs (one API and two polymers) containing the polymers hydroxypropyl cellulose together with poly(vinylpyrrolidone-co-vinyl acetate) (PVP VA64) or hydroxypropyl cellulose acetate succinate to stabilize the amorphously embedded APIs fenofibrate and simvastatin during storage and to enhance the dissolution performance. Thermodynamic predictions using the PC-SAFT model revealed for each combination of polymers the optimal polymer ratio, maximum API load that is thermodynamically stable as well as miscibility of the two polymers. The stability predictions were validated by three months enduring stability tests, followed by a characterization of the dissolution behavior. The thermodynamically most stable ASDs were found to be the ASDs with deteriorated dissolution performance. Within the investigated polymer combinations, physical stability and dissolution performance opposed each other.
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Affiliation(s)
| | - Edmont Stoyanov
- Nisso Chemical Europe GmbH, Berliner Allee 42, Düsseldorf D-40212, Germany
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2
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Rana AA, Yusaf A, Shahid S, Usman M, Ahmad M, Aslam S, Al-Hussain SA, Zaki MEA. Unveiling the Role of Nonionic Surfactants in Enhancing Cefotaxime Drug Solubility: A UV-Visible Spectroscopic Investigation in Single and Mixed Micellar Formulations. Pharmaceuticals (Basel) 2023; 16:1663. [PMID: 38139790 PMCID: PMC10747636 DOI: 10.3390/ph16121663] [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: 10/16/2023] [Revised: 11/18/2023] [Accepted: 11/22/2023] [Indexed: 12/24/2023] Open
Abstract
This study reports the interfacial phenomenon of cefotaxime in combination with nonionic surfactants, Triton X-100 (TX-100) and Tween-80 (TW-80), and their mixed micellar formulations. Cefotaxime was enclosed in a micellar system to improve its solubility and effectiveness. TX-100 and TW-80 were used in an amphiphilic self-assembly process to create the micellar formulation. The effect of the addition of TX-100, a nonionic surfactant, on the ability of TW-80 to solubilize the drug was examined. The values of the critical micelle concentration (CMC) were determined via UV-Visible spectroscopy. Gibbs free energies (ΔGp and ΔGb), the partition coefficient (Kx), and the binding constant (Kb) were also computed. In a single micellar system, the partition coefficient (Kx) was found to be 33.78 × 106 and 2.78 × 106 in the presence of TX-100 and TW-80, respectively. In a mixed micellar system, the value of the partition coefficient for the CEF/TW-80 system is maximum (5.48 × 106) in the presence of 0.0019 mM of TX-100, which shows that TX-100 significantly enhances the solubilizing power of micelles. It has been demonstrated that these surfactants are effective in enhancing the solubility and bioavailability of therapeutic compounds. This study elaborates on the physicochemical characteristics and solubilization of reactive drugs in single and mixed micellar media. This investigation, conducted in the presence of surfactants, shows a large contribution to the binding process via both hydrogen bonding and hydrophobic interactions.
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Affiliation(s)
- Aysha Arshad Rana
- Department of Chemistry, Government College Women University, Faisalabad 38000, Pakistan
| | - Amnah Yusaf
- Department of Chemistry, Government College Women University, Faisalabad 38000, Pakistan
| | - Salma Shahid
- Department of Biochemistry, Government College Women University, Faisalabad 38000, Pakistan
| | - Muhammad Usman
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Matloob Ahmad
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Sana Aslam
- Department of Chemistry, Government College Women University, Faisalabad 38000, Pakistan
| | - Sami A. Al-Hussain
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
| | - Magdi E. A. Zaki
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
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Sherif AY, Harisa GI, Shahba AA, Nasr FA, Taha EI, Alqahtani AS. Assembly of nanostructured lipid carriers loaded gefitinib and simvastatin as hybrid therapy for metastatic breast cancer: Codelivery and repurposing approach. Drug Dev Res 2023; 84:1453-1467. [PMID: 37519092 DOI: 10.1002/ddr.22097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 06/20/2023] [Accepted: 07/20/2023] [Indexed: 08/01/2023]
Abstract
Breast cancer represents a life-threatening problem globally. The major challenge in the clinical setting is the management of cancer resistance and metastasis. Hybrid therapy can affect several cellular targets involved in carcinogenesis with a lessening of adverse effects. Therefore, the current study aims to assemble, and optimize a hybrid of gefitinib (GFT) and simvastatin (SIM)-loaded nanostructured lipid carrier (GFT/SIM-NLC) to combat metastatic and drug-resistant breast cancer. GFT/SIM-NLC cargos were prepared using design of experiments to investigate the impact of poloxamer-188 and fatty acids concentrations on the physicochemical and pharmaceutical behavior properties of NLC. Additionally, the biosafety of the prepared GFT/SIM-NLC was studied using a fresh blood sample. Afterward, the optimized formulation was subjected to an MTT assay to study the cytotoxic activity of GFT/SIM-NLC compared to free GFT/SIM using an MCF-7 cell line as a surrogate model for breast cancer. The present results revealed that the particle size of the prepared NLC ranged from (209 to 410 nm) with a negative zeta potential value ranging from (-17.2 to -23.9 mV). Moreover, the optimized GFT/SIM-NLC formulation showed favorable physicochemical properties and promising lymphatic delivery cargos. A biosafety study indicates that the prepared NLC has a gentle effect on erythrocyte hemolysis. Cytotoxicity studies revealed that GFT/SIM-NLC enhanced the killing of the MCF-7 cell line compared to free GFT/SIM. This study concluded that the hybrid therapy of GFT/SIM-NLC is a potential approach to combat metastatic and drug-resistant breast cancer.
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Affiliation(s)
- Abdelrahman Y Sherif
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Gamaleldin I Harisa
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ahmad A Shahba
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Fahd A Nasr
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ehab I Taha
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ali S Alqahtani
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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Mehmood Y, Shahid H, Abbas M, Farooq U, Alshehri S, Alam P, Shakeel F, Ghoneim MM. Developing Nanosuspension Loaded with Azelastine for Potential Nasal Drug Delivery: Determination of Proinflammatory Interleukin IL-4 mRNA Expression and Industrial Scale-Up Strategy. ACS OMEGA 2023; 8:23812-23824. [PMID: 37426214 PMCID: PMC10324090 DOI: 10.1021/acsomega.3c02186] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 06/06/2023] [Indexed: 07/11/2023]
Abstract
In order to increase bioavailability and intranasal absorbance, the current work set out to create azelastine nasal spray based on nanosuspension. Chondroitin was utilized as a polymer to prepare azelastine nanosuspension through the precipitation procedure. A size of 500 nm and a polydispersity index of 0.276 with a negative potential (-20 mV) were achieved. X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, thermal analysis including differential scanning calorimetry and thermogravimetric analysis, in vitro release, and diffusion studies were used to characterize the optimized nanosuspension. MTT assay was used to assess the viability of the cells, and hemolysis assay was used to assess the blood compatibility. Using RNA extraction and reverse transcription polymerase chain reaction, the levels of the anti-inflammatory cytokine IL-4, which is most closely related to cytokines in allergic rhinitis, were measured in mouse lungs. The drug dissolution and diffusion study indicated 2.0-fold increase compared to pure reference sample. Therefore, the azelastine nanosuspension could be suggested as a practical and simple nanosystem for intranasal delivery with improved permeability and bioavailability. The outcome obtained in this study indicated that azelastine nanosuspension has great potential to treat allergic rhinitis as intranasal treatment.
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Affiliation(s)
- Yasir Mehmood
- Department
of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, P. O. Box 38000, Faisalabad 38040, Pakistan
- Riphah
Institute of Pharmaceutical Sciences (RIPS), Riphah International University, Faisalabad, P. O. Box 38000, Punjab 44000, Pakistan
| | - Hira Shahid
- Department
of Pharmacology, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, P. O. Box 38000, Faisalabad 38040, Pakistan
| | - Muhammad Abbas
- Imran
Adress College of Pharmacy, P. O. Box 51310, Sialkot 51310, Pakistan
| | - Umar Farooq
- Faculty
of Pharmacy, Grand Asian University, P. O. Box 51310, Sialkot, 51040 Punjab, Pakistan
| | - Sultan Alshehri
- Department
of Pharmaceutics, College of Pharmacy, King
Saud University, Riyadh 11451, Saudi Arabia
| | - Prawez Alam
- Department
of Pharmacognosy, College of Pharmacy, Prince
Sattam Bin Abdul Aziz University, Al-Kharj 11942, Saudi Arabia
| | - Faiyaz Shakeel
- Department
of Pharmaceutics, College of Pharmacy, King
Saud University, Riyadh 11451, Saudi Arabia
| | - Mohammed M. Ghoneim
- Department
of Pharmacy Practice, College of Pharmacy, AlMaarefa University, Ad Diriyah 13713, Saudi Arabia
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Guo P, Ma X, Ni C, Pang Z, Yang Z. Measurement and thermodynamic analysis of the solubility of iodine-containing organoaluminum supported by nitrogenous ligands in pure solvents. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.121143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Khadizatul K, Elshamy S, Taarji N, Sohan MSR, Kobayashi I, Nakajima M, Neves MA. Revisiting lycopene extraction: Caprylic acid-based emulsion for the highest recovery. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2022; 59:4427-4435. [PMID: 36193465 PMCID: PMC9525470 DOI: 10.1007/s13197-022-05522-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/19/2022] [Accepted: 05/24/2022] [Indexed: 06/16/2023]
Abstract
In this study, we evaluated the caprylic acid-based oil-in-water (O/W) emulsion-assisted extraction of lycopene from tomatoes. Emulsion-assisted extraction was performed using two types of micron-sized O/W emulsions: (a) O/W emulsion with absence or (b) presence of 0.1% (w/w) of Tween 20 emulsifier. This green extraction technique was compared with the conventional method using soybean oil, tributyrin, and caprylic acid. The results show that caprylic acid, a green solvent, is significantly more effective for lycopene recovery than soybean oil and tributyrin. In the absence of an emulsifier, caprylic acid-based O/W emulsion significantly improved the lycopene content by 14.69 mg/g, corresponding to a 98.59% extraction efficiency at 50 ˚C. The capability of the proposed approach to lycopene recovery was explained in terms of lycopene affinity, the ability to swell the tomato cell, and some other standard parameters. In addition, caprylic acid has the significant advantage that once developed with the extracted lycopene can be used directly as a food additive.
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Affiliation(s)
- Kubra Khadizatul
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572 Japan
| | - Samar Elshamy
- School of Integrative and Global Majors (SIGMA), Tsukuba Life Science Innovation Program (T-LSI), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572 Japan
| | - Noamane Taarji
- Biodiversity and Plant Sciences Program, Mohammed 6 Polytechnic University (UM6P), 43150 AgroBioScience, Benguerir Morocco
| | - Md Sohanur Rahman Sohan
- Graduate School of Science and Technology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577 Japan
| | - Isao Kobayashi
- Food Research Institute, NARO, 2-1-12 Kannondai, Tsukuba, Ibaraki Japan
| | - Mitsutoshi Nakajima
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572 Japan
| | - Marcos A. Neves
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572 Japan
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Badr-Eldin SM, Aldawsari HM, Alhakamy NA, Fahmy UA, Ahmed OAA, Neamatallah T, Tima S, Almaghrabi RH, Alkudsi FM, Alamoudi AA, Alzahrani AA, Kotta S, Al-hejaili OD. Merging Experimental Design and Nanotechnology for the Development of Optimized Simvastatin Spanlastics: A Promising Combined Strategy for Augmenting the Suppression of Various Human Cancer Cells. Pharmaceutics 2022; 14:1024. [PMID: 35631609 PMCID: PMC9143367 DOI: 10.3390/pharmaceutics14051024] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/02/2022] [Accepted: 05/06/2022] [Indexed: 01/27/2023] Open
Abstract
Simvastatin (SMV) is an antihyperlipidemic agent that has been investigated as a possible anti-cancer agent. An obstacle to malignant tumor therapy using drugs is the delivery of adequate levels to the cancer cells while minimizing side effects following their systemic administration. To circumvent this challenge, the researchers directed towards the field of nanotechnology to benefit from the nano-size of the formulation in passively targeting the tumor cells. Thus, our study aimed at investigating the potential of a combined mixture-process variable design for optimization of SMV spanlastics (SMV-SPNs) with minimized particle size and maximized zeta potential to enhance the anticancer activity of the drug. The study investigated the effects of Span® 20 and Tween® 80 as mixture components and sonication time as a process variable on particle size, polydispersity index, and zeta potential as responses. SPNs were prepared using an ethanol injection method. Combining the predicted optimized variables' levels is supposed to achieve the set goals with a desirability of 0.821. The optimized spanlastics exhibited a measured globule size of 128.50 nm, PDI of 0.329, and ZP of -29.11 mV. The percentage relative error between predicted responses and the observed ones were less than 5% for the three responses, indicating the optimization technique credibility. A significant improvement in the cytotoxicity of the optimized formulation against three different cancerous cell lines was observed in comparison with SMV. The inhibitory concentration (IC50) values of MCF-7, HCT-116, and HEPG2 were found to be 0.89, 0.39, and 0.06 μM at 24 h incubation. The enhanced cytotoxicity could be assigned to the possible improved permeation and preferential build-up within the cancerous cells by virtue of the minimized size. These findings imply that SMV-SPNs could be an ideal strategy to combat cancer.
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Affiliation(s)
- Shaimaa M. Badr-Eldin
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
- Center of Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Hibah M. Aldawsari
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
- Center of Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Nabil A. Alhakamy
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
- Center of Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Mohamed Saeed Tamer Chair for Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Usama A. Fahmy
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
- Center of Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Osama A. A. Ahmed
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
- Center of Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Mohamed Saeed Tamer Chair for Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Thikryat Neamatallah
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Singkome Tima
- Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand;
| | - Raghad H. Almaghrabi
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
| | - Fayda M. Alkudsi
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
| | - Asmaa A. Alamoudi
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
| | - Amjad A. Alzahrani
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
| | - Sabna Kotta
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
- Center of Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Omar D. Al-hejaili
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (H.M.A.); (N.A.A.); (U.A.F.); (O.A.A.A.); (R.H.A.); (F.M.A.); (A.A.A.); (A.A.A.); (S.K.); (O.D.A.-h.)
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Wu M, Wang D, Kong H, Liu H, Pan H. Development and optimization of aprepitant/HS15/TW80 composite system: Based on micellization thermodynamics. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Przybyłek M, Kowalska A, Tymorek N, Dziaman T, Cysewski P. Thermodynamic Characteristics of Phenacetin in Solid State and Saturated Solutions in Several Neat and Binary Solvents. Molecules 2021; 26:molecules26134078. [PMID: 34279418 PMCID: PMC8272242 DOI: 10.3390/molecules26134078] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/28/2021] [Accepted: 07/01/2021] [Indexed: 12/21/2022] Open
Abstract
The thermodynamic properties of phenacetin in solid state and in saturated conditions in neat and binary solvents were characterized based on differential scanning calorimetry and spectroscopic solubility measurements. The temperature-related heat capacity values measured for both the solid and melt states were provided and used for precise determination of the values for ideal solubility, fusion thermodynamic functions, and activity coefficients in the studied solutions. Factors affecting the accuracy of these values were discussed in terms of various models of specific heat capacity difference for phenacetin in crystal and super-cooled liquid states. It was concluded that different properties have varying sensitivity in relation to the accuracy of heat capacity values. The values of temperature-related excess solubility in aqueous binary mixtures were interpreted using the Jouyban–Acree solubility equation for aqueous binary mixtures of methanol, DMSO, DMF, 1,4-dioxane, and acetonitrile. All binary solvent systems studied exhibited strong positive non-ideal deviations from an algebraic rule of mixing. Additionally, an interesting co-solvency phenomenon was observed with phenacetin solubility in aqueous mixtures with acetonitrile or 1,4-dioxane. The remaining three solvents acted as strong co-solvents.
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Affiliation(s)
- Maciej Przybyłek
- Department of Physical Chemistry, Pharmacy Faculty, Collegium Medicum of Bydgoszcz, Nicolaus Copernicus University in Toruń, Kurpińskiego 5, 85-950 Bydgoszcz, Poland; (M.P.); (A.K.); (N.T.)
| | - Anna Kowalska
- Department of Physical Chemistry, Pharmacy Faculty, Collegium Medicum of Bydgoszcz, Nicolaus Copernicus University in Toruń, Kurpińskiego 5, 85-950 Bydgoszcz, Poland; (M.P.); (A.K.); (N.T.)
| | - Natalia Tymorek
- Department of Physical Chemistry, Pharmacy Faculty, Collegium Medicum of Bydgoszcz, Nicolaus Copernicus University in Toruń, Kurpińskiego 5, 85-950 Bydgoszcz, Poland; (M.P.); (A.K.); (N.T.)
| | - Tomasz Dziaman
- Department of Clinical Biochemistry, Pharmacy Faculty, Collegium Medicum of Bydgoszcz, Nicolaus Copernicus University in Toruń, Karłowicza 24, 85-950 Bydgoszcz, Poland;
| | - Piotr Cysewski
- Department of Physical Chemistry, Pharmacy Faculty, Collegium Medicum of Bydgoszcz, Nicolaus Copernicus University in Toruń, Kurpińskiego 5, 85-950 Bydgoszcz, Poland; (M.P.); (A.K.); (N.T.)
- Correspondence:
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