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Zalcman N, Larush L, Ovadia H, Charbit H, Magdassi S, Lavon I. Intracranial Assessment of Androgen Receptor Antagonists in Mice Bearing Human Glioblastoma Implants. Int J Mol Sci 2023; 25:332. [PMID: 38203506 PMCID: PMC10779261 DOI: 10.3390/ijms25010332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/20/2023] [Accepted: 12/25/2023] [Indexed: 01/12/2024] Open
Abstract
The median survival time of patients with an aggressive brain tumor, glioblastoma, is still poor due to ineffective treatment. The discovery of androgen receptor (AR) expression in 56% of cases offers a potential breakthrough. AR antagonists, including bicalutamide and enzalutamide, induce dose-dependent cell death in glioblastoma and glioblastoma-initiating cell lines (GIC). Oral enzalutamide at 20 mg/kg reduces subcutaneous human glioblastoma xenografts by 72% (p = 0.0027). We aimed to further investigate the efficacy of AR antagonists in intracranial models of human glioblastoma. In U87MG intracranial models, nude mice administered Xtandi (enzalutamide) at 20 mg/kg and 50 mg/kg demonstrated a significant improvement in survival compared to the control group (p = 0.24 and p < 0.001, respectively), confirming a dose-response relationship. Additionally, we developed a newly reformulated version of bicalutamide, named "soluble bicalutamide (Bic-sol)", with a remarkable 1000-fold increase in solubility. This reformulation significantly enhanced bicalutamide levels within brain tissue, reaching 176% of the control formulation's area under the curve. In the U87MG intracranial model, both 2 mg/kg and 4 mg/kg of Bic-sol exhibited significant efficacy compared to the vehicle-treated group (p = 0.0177 and p = 0.00364, respectively). Furthermore, combination therapy with 8 mg/kg Bic-sol and Temozolomide (TMZ) demonstrated superior efficacy compared to either Bic-sol or TMZ as monotherapies (p = 0.00706 and p = 0.0184, respectively). In the ZH-161 GIC mouse model, the group treated with 8 mg/kg Bic-sol as monotherapy had a significantly longer lifespan than the groups treated with TMZ or the vehicle (p < 0.001). Our study demonstrated the efficacy of androgen receptor antagonists in extending the lifespan of mice with intracranial human glioblastoma, suggesting a promising approach to enhance patient outcomes in the fight against this challenging disease.
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Affiliation(s)
- Nomi Zalcman
- Leslie and Michael Gaffin Center for Neuro-Oncology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel; (N.Z.)
- Agnes Ginges Center for Human Neurogenetics, Department of Neurology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel;
| | - Liraz Larush
- Casali Center, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91120, Israel; (L.L.); (S.M.)
| | - Haim Ovadia
- Agnes Ginges Center for Human Neurogenetics, Department of Neurology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel;
| | - Hanna Charbit
- Leslie and Michael Gaffin Center for Neuro-Oncology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel; (N.Z.)
- Agnes Ginges Center for Human Neurogenetics, Department of Neurology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel;
| | - Shlomo Magdassi
- Casali Center, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91120, Israel; (L.L.); (S.M.)
| | - Iris Lavon
- Leslie and Michael Gaffin Center for Neuro-Oncology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel; (N.Z.)
- Agnes Ginges Center for Human Neurogenetics, Department of Neurology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel;
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De Gaetano F, Cristiano MC, Paolino D, Celesti C, Iannazzo D, Pistarà V, Iraci N, Ventura CA. Bicalutamide Anticancer Activity Enhancement by Formulation of Soluble Inclusion Complexes with Cyclodextrins. Biomolecules 2022; 12:1716. [PMID: 36421730 PMCID: PMC9687945 DOI: 10.3390/biom12111716] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 08/27/2023] Open
Abstract
Bicalutamide (BCL) is a nonsteroidal antiandrogen drug that represents an alternative to castration in the treatment of prostate cancer, due to its relatively long half-life and tolerable side effects. However, it possesses a very low water solubility that can affect its oral bioavailability. In this work, we developed inclusion complexes of BCL with the highly soluble hydroxypropyl-β-cyclodextrin (HP-β-CyD) and sulfobutylether-β-cyclodextrin (SBE-β-CyD) to increase the water solubility and anticancer activity of BCL. The inclusion complexes were prepared using the freeze-drying method and were then characterized in a solid state via differential scanning calorimetry and X-ray analysis and in solution via phase-solubility studies and UV-vis and NMR spectroscopy. The BCL/HP-β-CyD and BCL/SBE-β-CyD inclusion complexes were amorphous and rapidly dissolved in water. Both the 1H-NMR spectra and molecular modeling studies confirmed the penetration of the 2-(trifluoromethyl)benzonitrile ring of BCL within the cavity of both cyclodextrins (CyDs). Due to the consistent improvement of the water solubility of BCL, the inclusion complexes showed higher antiproliferative activity toward the human prostate androgen-independent cell lines, DU-145 and PC-3, with respect to free BCL. These results demonstrate the ability of HP-β-CyD and SBE-β-CyD to complex BCL, permitting the realization of liquid formulations with potentially high oral bioavailability and/or possible parenteral administration.
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Affiliation(s)
- Federica De Gaetano
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres 31, I-98166 Messina, Italy
| | - Maria Chiara Cristiano
- Department of Clinical and Experimental Medicine, University ‘Magna Græcia’ of Catanzaro, I-88100 Catanzaro, Italy
| | - Donatella Paolino
- Department of Clinical and Experimental Medicine, University ‘Magna Græcia’ of Catanzaro, I-88100 Catanzaro, Italy
| | - Consuelo Celesti
- Department of Engineering, University of Messina, Contrada Di Dio, I-98166 Messina, Italy
- Department of Clinical and Experimental Medicine, University of Messina, Via Consolare Valeria, I-98125 Messina, Italy
| | - Daniela Iannazzo
- Department of Engineering, University of Messina, Contrada Di Dio, I-98166 Messina, Italy
| | - Venerando Pistarà
- Department of Pharmaceutical and Health Sciences, University of Catania, Viale Andrea Doria 6, I-95125 Catania, Italy
| | - Nunzio Iraci
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres 31, I-98166 Messina, Italy
| | - Cinzia Anna Ventura
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D’Alcontres 31, I-98166 Messina, Italy
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Zhang Z, Su Y, Xiao H, Yang J. Selective Nuclear Magnetic Resonance Method for Enhancing Long-Range Heteronuclear Correlations in Solids. J Phys Chem Lett 2022; 13:6376-6382. [PMID: 35796704 DOI: 10.1021/acs.jpclett.2c01527] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The long-range heteronuclear correlation remains a significant challenge in solid-state nuclear magnetic resonance (NMR), which is critical in the structural elucidation of biomolecular, material, and pharmaceutical solids. We propose a selective NMR method, heteronuclear selective phase-optimized recoupling (hetSPR), to selectively enhance long-range correlations of interest by utilizing characteristic chemical shifts. Compared to conventional methods, hetSPR can selectively enhance desired heteronuclear correlations (e.g., 1H-13C and 1H-19F) by factors up to 5 and largely suppress the unwanted ones. The method proves useful by enhancing the long-range correlation from an intermolecular 1H-19F distance of 4.8 Å by a factor of 2.4 in a fluorinated pharmaceutical drug, bicalutamide, under fast magic-angle spinning. It does not use selective pulses and is thus user-friendly even for nonexperts. The new method is expected to boost solid-state NMR to elucidate the structures of various solids.
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Affiliation(s)
- Zhengfeng Zhang
- National Center for Magnetic Resonance in Wuhan, Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, P. R. China
| | - Yongchao Su
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, the University of Texas at Austin, Austin, Texas 78712, United States
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Hang Xiao
- National Center for Magnetic Resonance in Wuhan, Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jun Yang
- National Center for Magnetic Resonance in Wuhan, Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, P. R. China
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
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Physicochemical Profile of Antiandrogen Drug Bicalutamide: Solubility, Distribution, Permeability. Pharmaceutics 2022; 14:pharmaceutics14030674. [PMID: 35336047 PMCID: PMC8954523 DOI: 10.3390/pharmaceutics14030674] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/14/2022] [Accepted: 03/16/2022] [Indexed: 02/04/2023] Open
Abstract
The pharmacologically relevant physicochemical properties of the antiandrogen drug bicalutamide (BCL) have been determined for the first time. Solubility in aqueous solution, 1-octanol, n-hexane, and ethanol was measured by the shake flask method in the temperature range of 293.15−313.15 K. The compound was shown to be poorly soluble in aqueous medium and n-hexane; at the same time, an essentially higher solubility in the alcohols was revealed. The following order of molar solubility was determined: ethanol > 1-octanol > water ≈ n-hexane. The solubility was correlated with the Van’t Hoff and Apelblat equations. Evaluation of the Hansen solubility parameters and the atomic group contribution approach of Hoftyzer and Van Krevelen demonstrated consistency with the experimental data and good potential adsorption of bicalutamide. The temperature dependences of the distribution coefficients in the 1-octanol/water and n-hexane/water two-phase systems were measured and discussed in the framework of the thermodynamic approach. The ∆logD parameter determined from the distribution experiment clearly demonstrated the preference of the lipophilic delivery pathways for the compound in the biological media. The overall thermodynamic analysis based on the solubility and distribution results of the present study and the sublimation characteristics published previously has been performed. To this end, the thermodynamic parameters of the dissolution, solvation, and transfer processes were calculated and discussed in view of the solute-solvent interactions. The permeation rate of BCL through the PermeaPad barrier was measured and compared with PAMPA permeability.
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Beran GJO, Wright SE, Greenwell C, Cruz-Cabeza AJ. The interplay of intra- and intermolecular errors in modeling conformational polymorphs. J Chem Phys 2022; 156:104112. [DOI: 10.1063/5.0088027] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Conformational polymorphs of organic molecular crystals represent a challenging test for quantum chemistry because they require careful balancing of the intra- and intermolecular interactions. This study examines 54 molecular conformations from 20 sets of conformational polymorphs, along with the relative lattice energies and 173 dimer interactions taken from six of the polymorph sets. These systems are studied with a variety of van der Waals-inclusive density functionals theory models; dispersion-corrected spin-component-scaled second-order Møller–Plesset perturbation theory (SCS-MP2D); and domain local pair natural orbital coupled cluster singles, doubles, and perturbative triples [DLPNO-CCSD(T)]. We investigate how delocalization error in conventional density functionals impacts monomer conformational energies, systematic errors in the intermolecular interactions, and the nature of error cancellation that occurs in the overall crystal. The density functionals B86bPBE-XDM, PBE-D4, PBE-MBD, PBE0-D4, and PBE0-MBD are found to exhibit sizable one-body and two-body errors vs DLPNO-CCSD(T) benchmarks, and the level of success in predicting the relative polymorph energies relies heavily on error cancellation between different types of intermolecular interactions or between intra- and intermolecular interactions. The SCS-MP2D and, to a lesser extent, ωB97M-V models exhibit smaller errors and rely less on error cancellation. Implications for crystal structure prediction of flexible compounds are discussed. Finally, the one-body and two-body DLPNO-CCSD(T) energies taken from these conformational polymorphs establish the CP1b and CP2b benchmark datasets that could be useful for testing quantum chemistry models in challenging real-world systems with complex interplay between intra- and intermolecular interactions, a number of which are significantly impacted by delocalization error.
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Affiliation(s)
- Gregory J. O. Beran
- Department of Chemistry, University of California, Riverside, California 92521, USA
| | - Sarah E. Wright
- Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester, United Kingdom
| | - Chandler Greenwell
- Department of Chemistry, University of California, Riverside, California 92521, USA
| | - Aurora J. Cruz-Cabeza
- Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester, United Kingdom
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Moseson DE, Corum ID, Lust A, Altman KJ, Hiew TN, Eren A, Nagy ZK, Taylor LS. Amorphous Solid Dispersions Containing Residual Crystallinity: Competition Between Dissolution and Matrix Crystallization. AAPS JOURNAL 2021; 23:69. [PMID: 34002256 DOI: 10.1208/s12248-021-00598-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 04/13/2021] [Indexed: 01/28/2023]
Abstract
Crystallinity in an amorphous solid dispersion (ASD) may negatively impact dissolution performance by causing lost solubility advantage and/or seeding crystal growth leading to desupersaturation. The goal of the study was to evaluate underlying dissolution and crystallization mechanisms resulting from residual crystallinity contained within bicalutamide (BCL)/polyvinylpyrrolidone vinyl acetate copolymer (PVPVA) ASDs produced by hot melt extrusion (HME). In-line Raman spectroscopy, polarized light microscopy, and scanning electron microscopy were used to characterize crystallization kinetics and mechanisms. The fully amorphous ASD (0% crystallinity) did not dissolve completely, and underwent crystallization to the metastable polymorph (form 2), initiating in the amorphous matrix at the interface of the amorphous solid with water. Under non-sink conditions, higher extents of supersaturation were achieved because dissolution initially proceeded unhindered prior to nucleation. ASDs containing residual crystallinity had markedly reduced supersaturation. Solid-mediated crystallization (matrix crystallization) consumed the amorphous solid, growing the stable polymorph (form 1). Under sink conditions, both the fully amorphous ASD and crystalline physical mixture achieve faster release than the ASDs containing residual crystallinity. In the latter systems, matrix crystallization leads to highly agglomerated crystals with high relative surface area. Solution-mediated crystallization was not a significant driver of concentration loss, due to slow crystal growth from solution in the presence of PVPVA. The high risk stemming from residual crystallinity in BCL/PVPVA ASDs stems from (1) fast matrix crystallization propagating from crystal seeds, and (2) growth of the stable crystal form. This study has implications for dissolution performance outcomes of ASDs containing residual crystallinity.
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Affiliation(s)
- Dana E Moseson
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana, 47907, USA
| | - Isaac D Corum
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana, 47907, USA
| | - Andres Lust
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana, 47907, USA
| | - Kevin J Altman
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana, 47907, USA
| | - Tze Ning Hiew
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana, 47907, USA
| | - Ayse Eren
- Charles B. Davidson School of Chemical Engineering, College of Engineering, Purdue University, West Lafayette, Indiana, 47907, USA
| | - Zoltan K Nagy
- Charles B. Davidson School of Chemical Engineering, College of Engineering, Purdue University, West Lafayette, Indiana, 47907, USA
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana, 47907, USA.
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Pacułt J, Rams-Baron M, Chmiel K, Jurkiewicz K, Antosik A, Szafraniec J, Kurek M, Jachowicz R, Paluch M. How can we improve the physical stability of co-amorphous system containing flutamide and bicalutamide? The case of ternary amorphous solid dispersions. Eur J Pharm Sci 2021; 159:105697. [PMID: 33568330 DOI: 10.1016/j.ejps.2020.105697] [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] [Indexed: 10/22/2022]
Abstract
The article describes the preparation and characterization of binary mixtures of two antiandrogens used in prostate cancer treatment, i.e. flutamide (FL) and bicalutamide (BIC), as well as their ternary mixtures with either poly(methyl methacrylate-co-ethyl acrylate) (MMA/EA) or polyvinylpyrrolidone (PVP). The samples were converted into amorphous form to improve their water solubility and dissolution rate. Broadband dielectric spectroscopy and differential scanning calorimetry revealed that FL-BIC (65%) (w/w) does not tend to crystallize from the supercooled liquid state. We made the assumption that the drug-to-drug weight ratio should be maintained as in the case of monotherapy so we decided to investigate the system containing FL and BIC in 15:1 (w/w) ratio with 30% additive of polymers as stabilizers. Our research has shown that only in the case of the FL-BIC-PVP mixture the crystallization has been completely inhibited, both in glassy and supercooled liquid state, which was confirmed by X-ray diffraction studies. In addition, we performed solubility and dissolution rate tests, which showed a significant improvement in solubility of ternary system as compared to its crystalline counterpart. Enhanced physical stability and water solubility of the amorphous ternary system makes it promising for further studies.
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Affiliation(s)
- Justyna Pacułt
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Marzena Rams-Baron
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland.
| | - Krzysztof Chmiel
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Karolina Jurkiewicz
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Agata Antosik
- Jagiellonian University Medical College, Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Medyczna 9, 30-688 Kraków, Poland
| | - Joanna Szafraniec
- Jagiellonian University Medical College, Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Medyczna 9, 30-688 Kraków, Poland
| | - Mateusz Kurek
- Jagiellonian University Medical College, Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Medyczna 9, 30-688 Kraków, Poland
| | - Renata Jachowicz
- Jagiellonian University Medical College, Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Medyczna 9, 30-688 Kraków, Poland
| | - Marian Paluch
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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Mesoporous silica MCM-41 and HMS as advanced drug delivery carriers for bicalutamide. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102340] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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How Does the CO 2 in Supercritical State Affect the Properties of Drug-Polymer Systems, Dissolution Performance and Characteristics of Tablets Containing Bicalutamide? MATERIALS 2020; 13:ma13122848. [PMID: 32630453 PMCID: PMC7344854 DOI: 10.3390/ma13122848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 06/19/2020] [Accepted: 06/22/2020] [Indexed: 12/19/2022]
Abstract
The increasing demand for novel drug formulations has caused the introduction of the supercritical fluid technology, CO2 in particular, into pharmaceutical technology as a method enabling the reduction of particle size and the formation of inclusion complexes and solid dispersions. In this paper, we describe the application of scCO2 in the preparation of binary systems containing poorly soluble antiandrogenic drug bicalutamide and polymeric excipients, either Macrogol 6000 or Poloxamer®407. The changes in the particle size and morphology were followed using scanning electron microscopy and laser diffraction measurements. Differential scanning calorimetry was applied to assess thermal properties, while X-ray powder diffractometry was used to determine the changes in the crystal structure of the systems. The dissolution of bicalutamide was also considered. Binary solid dispersions were further compressed, and the attributes of tablets were assessed. Tablets were analyzed directly after manufacturing and storage in climate chambers. The obtained results indicate that the use of supercritical CO2 led to the morphological changes of particles and the improvement of drug dissolution. The flowability of blends containing processed binary systems was poor; however, they were successfully compressed into tablets exhibiting enhanced drug release.
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Compression-Induced Phase Transitions of Bicalutamide. Pharmaceutics 2020; 12:pharmaceutics12050438. [PMID: 32397432 PMCID: PMC7284452 DOI: 10.3390/pharmaceutics12050438] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/27/2020] [Accepted: 05/06/2020] [Indexed: 11/26/2022] Open
Abstract
The formation of solid dispersions with the amorphous drug dispersed in the polymeric matrix improves the dissolution characteristics of poorly soluble drugs. Although they provide an improved absorption after oral administration, the recrystallization, which can occur upon absorption of moisture or during solidification and other formulation stages, serves as a major challenge. This work aims at understanding the amorphization-recrystallization changes of bicalutamide. Amorphous solid dispersions with poly(vinylpyrrolidone-co-vinyl acetate) (PVP/VA) were obtained by either ball milling or spray drying. The applied processes led to drug amorphization as confirmed using X-ray diffraction and differential scanning calorimetry. Due to a high propensity towards mechanical activation, the changes of the crystal structure of physical blends of active pharmaceutical ingredient (API) and polymer upon pressure were also examined. The compression led to drug amorphization or transition from form I to form II polymorph, depending on the composition and applied force. The formation of hydrogen bonds confirmed using infrared spectroscopy and high miscibility of drug and polymer determined using non-isothermal dielectric measurements contributed to the high stability of amorphous solid dispersions. They exhibited improved wettability and dissolution enhanced by 2.5- to 11-fold in comparison with the crystalline drug. The drug remained amorphous upon compression when the content of PVP/VA in solid dispersions exceeded 20% or 33%, in the case of spray-dried and milled systems, respectively.
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Korlyukov AA, Malinska M, Vologzhanina AV, Goizman MS, Trzybinski D, Wozniak K. Charge density view on bicalutamide molecular interactions in the monoclinic polymorph and androgen receptor binding pocket. IUCRJ 2020; 7:71-82. [PMID: 31949906 PMCID: PMC6949590 DOI: 10.1107/s2052252519014416] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
High-resolution single-crystal X-ray measurements of the monoclinic polymorph of bicalutamide and the aspherical atom databank approach have served as a basis for a reconstruction of the charge density distribution of the drug and its androgen receptor (AR) and albumin complexes. The contributions of various types of intermolecular interactions to the total crystal energy or ligand:AR energy were estimated. The cyan and amide groups secured the ligand placement in the albumin (Lys-137) and the AR binding pocket (Leu-704, Asn-705, Arg-752), and also determined the packing of the small-molecule crystals. The total electrostatic interaction energy on average was -230 kJ mol-1, comparable with the electrostatic lattice energy of the monoclinic bicalutamide polymorph. This is the result of similar distributions of electropositive and electronegative regions on the experimental and theoretical molecular electrostatic potential maps despite differences in molecular conformations. In general, bicalutamide interacted with the studied proteins with similar electrostatic interaction energies and adjusted its conformation and electrostatic potential to fit the binding pocket in such a way as to enhance the interactions, e.g. hydrogen bonds and π⋯π stacking.
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Affiliation(s)
- Alexander A. Korlyukov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilov St. 28, Moscow 119991, Russian Federation
| | - Maura Malinska
- Biological and Chemical Research Centre, Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, Warszawa 02089, Poland
| | - Anna V. Vologzhanina
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilov St. 28, Moscow 119991, Russian Federation
| | - Mikhail S. Goizman
- Drug Technology Co, 2a Rabochaya Street, Chimki, Moscow Oblast 141400, Russian Federation
| | - Damian Trzybinski
- Biological and Chemical Research Centre, Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, Warszawa 02089, Poland
| | - Krzysztof Wozniak
- Biological and Chemical Research Centre, Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, Warszawa 02089, Poland
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12
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Jamróz W, Kurek M, Szafraniec-Szczęsny J, Czech A, Gawlak K, Knapik-Kowalczuk J, Leszczyński B, Wróbel A, Paluch M, Jachowicz R. Speed it up, slow it down…An issue of bicalutamide release from 3D printed tablets. Eur J Pharm Sci 2019; 143:105169. [PMID: 31785383 DOI: 10.1016/j.ejps.2019.105169] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/17/2019] [Accepted: 11/25/2019] [Indexed: 01/17/2023]
Abstract
The article describes the preparation and characterization of 3D-printed tablets with bicalutamide obtained using two-material co-extrusion-based fused deposition modeling (FDM). This method is a modification of typical two-material FDM where separate nozzles are used to print from two filaments. In this work we used a ZMorph® 3D printer with DualPro printhead which allows us to co-extrude two filaments through a single nozzle. This approach gives the opportunity to modify tablet properties in a wide range, especially the dissolution rate, by producing dosage forms with a complex design. The great advantage of this method is that switching between immediate dosage form and controlled release does not require any change in the 3D-printer set-up. We checked the accuracy of co-extrusion printing simply by weighing the amounts of soluble and insoluble material in the printed object as well as calculating the volumes of the printed objects from micro computed tomography (µ-CT) images. We printed several tablets with a different design including simple one-material tablets, two- and three-compartment tablets with various internal structure and composition of the printing path. The dissolution tests were conducted in sink and non-sink conditions. We obtained tablets with desired bicalutamide dissolution profiles, i.e. immediate, controlled, and combined. The formation of spatial matrix slows down the dissolution in controlled and combined release bicalutamide tablets what was confirmed by µ-CT analysis before and after dissolution.
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Affiliation(s)
- Witold Jamróz
- Chair and Department of Pharmaceutical Technology and Biopharmaceutics, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland.
| | - Mateusz Kurek
- Chair and Department of Pharmaceutical Technology and Biopharmaceutics, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
| | - Joanna Szafraniec-Szczęsny
- Chair and Department of Pharmaceutical Technology and Biopharmaceutics, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland; Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa str., 30-387 Krakow, Poland
| | - Anna Czech
- Chair and Department of Pharmaceutical Technology and Biopharmaceutics, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
| | - Karolina Gawlak
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa str., 30-387 Krakow, Poland
| | - Justyna Knapik-Kowalczuk
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Bartosz Leszczyński
- M. Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11 30-348 Krakow, Poland
| | - Andrzej Wróbel
- M. Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11 30-348 Krakow, Poland
| | - Marian Paluch
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Renata Jachowicz
- Chair and Department of Pharmaceutical Technology and Biopharmaceutics, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
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13
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Harnessing the therapeutic potential of anticancer drugs through amorphous solid dispersions. Biochim Biophys Acta Rev Cancer 2019; 1873:188319. [PMID: 31678141 DOI: 10.1016/j.bbcan.2019.188319] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/28/2019] [Accepted: 10/28/2019] [Indexed: 12/19/2022]
Abstract
The treatment of cancer is still a major challenge. But tremendous progress in anticancer drug discovery and development has occurred in the last few decades. However, this progress has resulted in few effective oncology products due to challenges associated with anticancer drug delivery. Oral administration is the most preferred route for anticancer drug delivery, but the majority of anticancer drugs currently in product pipelines and the majority of those that have been commercially approved have inherently poor water solubility, and this cannot be mitigated without compromising their potency and stability. The poor water solubility of anticancer drugs, in conjunction with other factors, leads to suboptimal pharmacokinetic performance. Thus, these drugs have limited efficacy and safety when administered orally. The amorphous solid dispersion (ASD) is a promising formulation technology that primarily enhances the aqueous solubility of poorly water-soluble drugs. In this review, we discuss the challenges associated with the oral administration of anticancer drugs and the use of ASD technology in alleviating these challenges. We emphasize the ability of ASDs to improve not only the pharmacokinetics of poorly water-soluble anticancer drugs, but also their efficacy and safety. The goal of this paper is to rationalize the application of ASD technology in the formulation of anticancer drugs, thereby creating superior oncology products that lead to improved therapeutic outcomes.
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14
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Pacult J, Rams-Baron M, Chmiel K, Jurkiewicz K, Antosik A, Szafraniec J, Kurek M, Jachowicz R, Paluch M. How can we improve the physical stability of co-amorphous system containing flutamide and bicalutamide? The case of ternary amorphous solid dispersions. Eur J Pharm Sci 2019; 136:104947. [PMID: 31170526 DOI: 10.1016/j.ejps.2019.06.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Revised: 04/24/2019] [Accepted: 06/02/2019] [Indexed: 10/26/2022]
Abstract
The article describes the preparation and characterization of binary mixtures of two antiandrogens used in prostate cancer treatment, i.e. flutamide (FL) and bicalutamide (BIC), as well as their ternary mixtures with either poly(methyl methacrylate-co-ethyl acrylate) (MMA/EA) or polyvinylpyrrolidone (PVP). The samples were converted into amorphous form to improve their water solubility and dissolution rate. Broadband dielectric spectroscopy and differential scanning calorimetry revealed that FL-BIC (65%) (w/w) does not tend to crystallize from the supercooled liquid state. We made the assumption that the drug-to-drug weight ratio should be maintained as in the case of monotherapy so we decided to investigate the system containing FL and BIC in 15:1 (w/w) ratio with 30% additive of polymers as stabilizers. Our research has shown that only in the case of the FL-BIC-PVP mixture the crystallization has been completely inhibited, both in glassy and supercooled liquid state, which was confirmed by X-ray diffraction studies. In addition, we performed solubility and dissolution rate tests, which showed a significant improvement in solubility of ternary system as compared to its crystalline counterpart. Enhanced physical stability and water solubility of the amorphous ternary system makes it promising for further studies.
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Affiliation(s)
- Justyna Pacult
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Marzena Rams-Baron
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland.
| | - Krzysztof Chmiel
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Karolina Jurkiewicz
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Agata Antosik
- Jagiellonian University Medical College, Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Medyczna 9, 30-688 Kraków, Poland
| | - Joanna Szafraniec
- Jagiellonian University Medical College, Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Medyczna 9, 30-688 Kraków, Poland
| | - Mateusz Kurek
- Jagiellonian University Medical College, Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Medyczna 9, 30-688 Kraków, Poland
| | - Renata Jachowicz
- Jagiellonian University Medical College, Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Medyczna 9, 30-688 Kraków, Poland
| | - Marian Paluch
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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15
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Essa EA, Elbasuony AR, Abdelaziz AE, El Maghraby GM. Co-crystallization for enhanced dissolution rate of bicalutamide: preparation and evaluation of rapidly disintegrating tablets. Drug Dev Ind Pharm 2019; 45:1215-1223. [DOI: 10.1080/03639045.2019.1571504] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - Aya R. Elbasuony
- College of Pharmacy, Kafrelsheikh University, Kafrelsheikh, Egypt
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16
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Szafraniec J, Antosik A, Knapik-Kowalczuk J, Chmiel K, Kurek M, Gawlak K, Odrobińska J, Paluch M, Jachowicz R. The Self-Assembly Phenomenon of Poloxamers and Its Effect on the Dissolution of a Poorly Soluble Drug from Solid Dispersions Obtained by Solvent Methods. Pharmaceutics 2019; 11:E130. [PMID: 30893859 PMCID: PMC6470807 DOI: 10.3390/pharmaceutics11030130] [Citation(s) in RCA: 15] [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: 02/13/2019] [Revised: 03/14/2019] [Accepted: 03/15/2019] [Indexed: 12/14/2022] Open
Abstract
The self-assembly phenomenon of amphiphiles has attracted particular attention in recent years due to its wide range of applications. The formation of nanoassemblies able to solubilize sparingly water-soluble drugs was found to be a strategy to solve the problem of poor solubility of active pharmaceutical ingredients. Binary and ternary solid dispersions containing Biopharmaceutics Classification System (BCS) class II drug bicalutamide and either Poloxamer®188 or Poloxamer®407 as the surface active agents were obtained by either spray drying or solvent evaporation under reduced pressure. Both processes led to morphological changes and a reduction of particle size, as confirmed by scanning electron microscopy and laser diffraction measurements. The increase in powder wettability was confirmed by means of contact angle measurements. The effect of an alteration of the crystal structure was followed by powder X-ray diffractometry while thermal properties were determined using differential scanning calorimetry. Interestingly, bicalutamide exhibited a polymorph transition after spray drying with the poloxamer and polyvinylpyrrolidone (PVP), while the poloxamer underwent partial amorphization. Moreover, due to the surface activity of the carrier, the solid dispersions formed nanoaggregates in water, as confirmed using dynamic light scattering measurements. The aggregates measuring 200⁻300 nm in diameter were able to solubilize bicalutamide inside the hydrophobic inner parts. The self-assembly of binary systems was found to improve the amount of dissolved bicalutamide by 4- to 8-fold in comparison to untreated drug. The improvement in drug dissolution was correlated with the solubilization of poorly soluble molecules by macromolecules, as assessed using emission spectroscopy.
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Affiliation(s)
- Joanna Szafraniec
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland.
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland.
| | - Agata Antosik
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland.
| | - Justyna Knapik-Kowalczuk
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
| | - Krzysztof Chmiel
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
| | - Mateusz Kurek
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland.
| | - Karolina Gawlak
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland.
| | - Joanna Odrobińska
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland.
| | - Marian Paluch
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
| | - Renata Jachowicz
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland.
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17
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Molecular Disorder of Bicalutamide-Amorphous Solid Dispersions Obtained by Solvent Methods. Pharmaceutics 2018; 10:pharmaceutics10040194. [PMID: 30340413 PMCID: PMC6321060 DOI: 10.3390/pharmaceutics10040194] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 10/12/2018] [Accepted: 10/16/2018] [Indexed: 11/21/2022] Open
Abstract
The effect of solvent removal techniques on phase transition, physical stability and dissolution of bicalutamide from solid dispersions containing polyvinylpyrrolidone (PVP) as a carrier was investigated. A spray dryer and a rotavapor were applied to obtain binary systems containing either 50% or 66% of the drug. Applied techniques led to the formation of amorphous solid dispersions as confirmed by X-ray powder diffractometry and differential scanning calorimetry. Moreover, solid–solid transition from polymorphic form I to form II was observed for bicalutamide spray dried without a carrier. The presence of intermolecular interactions between the drug and polymer molecules, which provides the stabilization of molecularly disordered bicalutamide, was analyzed using infrared spectroscopy. Spectral changes within the region characteristic for amide vibrations suggested that the amide form of crystalline bicalutamide was replaced by a less stable imidic one, characteristic of an amorphous drug. Applied processes also resulted in changes of particle geometry and size as confirmed by scanning electron microscopy and laser diffraction measurements, however they did not affect the dissolution significantly as confirmed by intrinsic dissolution study. The enhancement of apparent solubility and dissolution were assigned mostly to the loss of molecular arrangement by drug molecules. Performed statistical analysis indicated that the presence of PVP reduces the mean dissolution time and improve the dissolution efficiency. Although the dissolution was equally affected by both applied methods of solid dispersion manufacturing, spray drying provides better control of particle size and morphology as well as a lower tendency for recrystallization of amorphous solid dispersions.
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18
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Szafraniec J, Antosik A, Knapik-Kowalczuk J, Chmiel K, Kurek M, Gawlak K, Paluch M, Jachowicz R. Enhanced dissolution of solid dispersions containing bicalutamide subjected to mechanical stress. Int J Pharm 2018; 542:18-26. [PMID: 29481948 DOI: 10.1016/j.ijpharm.2018.02.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 02/21/2018] [Accepted: 02/22/2018] [Indexed: 11/16/2022]
Abstract
The anticancer drug bicalutamide was co-milled with either Macrogol 6000 or Poloxamer 407, and the physicochemical parameters that drive the phase transition of binary systems and influence the dissolution modification of bicalutamide were studied. Milled binary systems with reduced particle size were assessed by scanning electron microscopy and laser diffraction measurements. The results of thermal analysis supported by X-ray diffractometry confirmed the reduction of the crystallinity of bicalutamide co-milled with Macrogol 6000. Infrared spectroscopy was used to determine the molecular structure of the samples and indicated weak interactions between drug and polymer molecules. Two mechanisms were identified and were involved in up to 11-fold enhanced dissolution. The first one was based on improved wettability due to a decreased contact angle in samples containing Macrogol 6000. The second one relied on the solubilization of bicalutamide within nanoaggregates formed by Poloxamer 407 that resulted from its surface activity. This finding was confirmed with fluorescence spectroscopy, dynamic light scattering and cryogenic transmission electron microscopy assays. Given the dissolution rate-limited absorption combined with the reduced bioavailability of bicalutamide as a BCS class II drug, the assessment of the mechanisms driving the increase in drug dissolution is of particular importance in drug development.
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Affiliation(s)
- Joanna Szafraniec
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland; Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland.
| | - Agata Antosik
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
| | - Justyna Knapik-Kowalczuk
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Krzysztof Chmiel
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Mateusz Kurek
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
| | - Karolina Gawlak
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Marian Paluch
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Renata Jachowicz
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
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19
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The indications of tautomeric conversion in amorphous bicalutamide drug. Eur J Pharm Sci 2017; 110:117-123. [DOI: 10.1016/j.ejps.2017.06.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 06/26/2017] [Accepted: 06/27/2017] [Indexed: 02/06/2023]
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20
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Yang C, Di P, Fu J, Xiong H, Jing Q, Ren G, Tang Y, Zheng W, Liu G, Ren F. Improving the physicochemical properties of bicalutamide by complex formation with bovine serum albumin. Eur J Pharm Sci 2017; 106:381-392. [DOI: 10.1016/j.ejps.2017.05.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 05/25/2017] [Accepted: 05/26/2017] [Indexed: 11/27/2022]
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21
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Szafraniec J, Antosik A, Knapik-Kowalczuk J, Kurek M, Syrek K, Chmiel K, Paluch M, Jachowicz R. Planetary ball milling and supercritical fluid technology as a way to enhance dissolution of bicalutamide. Int J Pharm 2017; 533:470-479. [PMID: 28363855 DOI: 10.1016/j.ijpharm.2017.03.078] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 03/23/2017] [Accepted: 03/28/2017] [Indexed: 12/17/2022]
Abstract
Dissolution of bicalutamide processed with polyvinylpyrrolidone by either supercritical carbon dioxide or ball milling has been investigated. Various compositions as well as process parameters were used to obtain binary systems of the drug with the carrier. Thermal analysis and powder X-ray diffractometry confirmed amorphization of bicalutamide mechanically activated by ball milling and the decrease in crystallinity of the supercritical carbon dioxide-treated drug. Both methods led to reduction of particles size what was confirmed by scanning electron microscopy and laser diffraction measurements. Moreover, the effect of micronisation was found to depend on the parameters of applied process. Fourier transform infrared spectroscopy revealed the appearance of intermolecular interactions between drug and carrier molecules that play an important role in the stabilization of amorphous form of the active compound. Changes in crystal structure combined with reduced size of particles of bicalutamide dispersed within polymer matrix were found to improve dissolution of bicalutamide by 4 to 10-fold in comparison to untreated drug. It is of particular importance as poor dissolution profiles are considered to be the major limitation in bioavailability of the drug.
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Affiliation(s)
- Joanna Szafraniec
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland; Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland.
| | - Agata Antosik
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
| | - Justyna Knapik-Kowalczuk
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Mateusz Kurek
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
| | - Karolina Syrek
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Krzysztof Chmiel
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Marian Paluch
- Division of Biophysics and Molecular Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Renata Jachowicz
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
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22
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Surov AO, Solanko KA, Bond AD, Bauer-Brandl A, Perlovich GL. Cocrystals of the antiandrogenic drug bicalutamide: screening, crystal structures, formation thermodynamics and lattice energies. CrystEngComm 2016. [DOI: 10.1039/c6ce00931j] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new cocrystals of the antiandrogenic drug bicalutamide with benzamide and salicylamide are reported. Relationships between crystal structures, melting temperatures, aqueous dissolution, formation thermodynamics and crystal lattice energies of the cocrystals are investigated.
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Affiliation(s)
- Artem O. Surov
- Institution of Russian Academy of Sciences
- G.A. Krestov Institute of Solution Chemistry RAS
- 153045 Ivanovo, Russia
| | - Katarzyna A. Solanko
- Department of Physics, Chemistry and Pharmacy
- University of Southern Denmark
- 5230 Odense M, Denmark
| | - Andrew D. Bond
- Department of Physics, Chemistry and Pharmacy
- University of Southern Denmark
- 5230 Odense M, Denmark
| | - Annette Bauer-Brandl
- Department of Physics, Chemistry and Pharmacy
- University of Southern Denmark
- 5230 Odense M, Denmark
| | - German L. Perlovich
- Institution of Russian Academy of Sciences
- G.A. Krestov Institute of Solution Chemistry RAS
- 153045 Ivanovo, Russia
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23
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Arya A, Khandelwal K, Ahmad H, Laxman TS, Sharma K, Mittapelly N, Agrawal S, Bhatta RS, Dwivedi AK. Co-delivery of hesperetin enhanced bicalutamide induced apoptosis by exploiting mitochondrial membrane potential via polymeric nanoparticles in a PC-3 cell line. RSC Adv 2016. [DOI: 10.1039/c5ra23067e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this research, we reported the co-delivery of anti-androgen drug Bicalutamide with Hesperetin in chitosan coated polycaprolactone nanoparticles to increase their therapeutic efficacy against an androgen independent prostate cancer cell lines.
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Affiliation(s)
- Abhishek Arya
- Pharmaceutics Division
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
- Academy of Scientific & Innovative Research
| | - Kiran Khandelwal
- Pharmaceutics Division
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
- Jawaharlal Nehru University
| | - Hafsa Ahmad
- Pharmaceutics Division
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
| | - Tulsankar Sachin Laxman
- Academy of Scientific & Innovative Research
- Chennai-600113
- India
- Pharmacokinetics and Metabolism
- CSIR-Central Drug Research Institute
| | - Komal Sharma
- Pharmaceutics Division
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
- Academy of Scientific & Innovative Research
| | - Naresh Mittapelly
- Pharmaceutics Division
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
- Academy of Scientific & Innovative Research
| | - Satish Agrawal
- Pharmaceutics Division
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
- Academy of Scientific & Innovative Research
| | - Rabi S. Bhatta
- Pharmacokinetics and Metabolism
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
| | - Anil K. Dwivedi
- Pharmaceutics Division
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
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25
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Tres F, Patient JD, Williams PM, Treacher K, Booth J, Hughes LP, Wren SAC, Aylott JW, Burley JC. Monitoring the Dissolution Mechanisms of Amorphous Bicalutamide Solid Dispersions via Real-Time Raman Mapping. Mol Pharm 2015; 12:1512-22. [DOI: 10.1021/mp500829v] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Francesco Tres
- School
of Pharmacy, University of Nottingham, Boots Science Building, Nottingham NG7 2RD, United Kingdom
| | - Jamie D. Patient
- School
of Pharmacy, University of Nottingham, Boots Science Building, Nottingham NG7 2RD, United Kingdom
| | - Philip M. Williams
- School
of Pharmacy, University of Nottingham, Boots Science Building, Nottingham NG7 2RD, United Kingdom
| | - Kevin Treacher
- Pharmaceutical
Development, AstraZeneca, Macclesfield SK10 2NA, United Kingdom
| | - Jonathan Booth
- Pharmaceutical
Development, AstraZeneca, Macclesfield SK10 2NA, United Kingdom
| | - Leslie P. Hughes
- Pharmaceutical
Development, AstraZeneca, Macclesfield SK10 2NA, United Kingdom
| | - Stephen A. C. Wren
- Pharmaceutical
Development, AstraZeneca, Macclesfield SK10 2NA, United Kingdom
| | - Jonathan W. Aylott
- School
of Pharmacy, University of Nottingham, Boots Science Building, Nottingham NG7 2RD, United Kingdom
| | - Jonathan C. Burley
- School
of Pharmacy, University of Nottingham, Boots Science Building, Nottingham NG7 2RD, United Kingdom
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26
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Affiliation(s)
- Aurora J Cruz-Cabeza
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
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27
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Ponikvar-Svet M, Zeiger DN, Keating LR, Liebman JF. Interplay of thermochemistry and Structural Chemistry, the journal (volume 23, 2012, issues 4–6) and the discipline. Struct Chem 2013. [DOI: 10.1007/s11224-013-0280-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Li C, Wang JX, Le Y, Chen JF. Studies of Bicalutamide–Excipients Interaction by Combination of Molecular Docking and Molecular Dynamics Simulation. Mol Pharm 2013; 10:2362-9. [DOI: 10.1021/mp300727d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Caixia Li
- State Key Laboratory
of Organic−Inorganic
Composites, Beijing University of Chemical Technology, Beijing 100029,
China
| | - Jie-Xin Wang
- State Key Laboratory
of Organic−Inorganic
Composites, Beijing University of Chemical Technology, Beijing 100029,
China
| | - Yuan Le
- State Key Laboratory
of Organic−Inorganic
Composites, Beijing University of Chemical Technology, Beijing 100029,
China
| | - Jian-Feng Chen
- State Key Laboratory
of Organic−Inorganic
Composites, Beijing University of Chemical Technology, Beijing 100029,
China
- Research Center of
the Ministry
of Education for High Gravity Engineering and Technology, Beijing
University of Chemical Technology, Beijing 100029, China
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29
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Mast N, Zheng W, Stout CD, Pikuleva IA. Binding of a cyano- and fluoro-containing drug bicalutamide to cytochrome P450 46A1: unusual features and spectral response. J Biol Chem 2013; 288:4613-24. [PMID: 23288837 DOI: 10.1074/jbc.m112.438754] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cytochrome P450 46A1 (CYP46A1) is the cholesterol 24-hydroxylase initiating the major pathways of cholesterol removal from the brain, and bicalutamide (BIC) is a drug of choice for the treatment of progressive androgen-dependent prostate cancer. We evaluated the interactions of BIC with CYP46A1 by x-ray crystallography and by conducting solution and mutagenesis studies. Because BIC is administered to patients as a racemic mixture of the S and R isomers, we studied all three, racemic BIC as well as the S and R isomers. Co-crystallization of CYP46A1 with racemic BIC led to structure determinations at 2.1 Å resolution with the drug complexes exhibiting novel properties. Both BIC isomers bind to the CYP46A1 active site in very similar single orientation and adopt an energetically unfavorable folded conformation. This folded BIC conformation is correlated with drug-induced localized shifts of amino acid side chains in CYP46A1 and unusual interactions in the CYP46A1-BIC complex. One of these interactions involves a water molecule that is coordinated to the P450 heme iron and also hydrogen-bonded to the BIC nitrile. Due to polarization of the water in this environment, the heme elicits previously unreported types of P450 spectral responses. We also observed that access to the P450 active site was affected by differential recognition of S versus R isomers at the CYP46A1 surface arising from BIC conformational polymorphism.
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Affiliation(s)
- Natalia Mast
- Department of Ophthalmology and Visual Sciences, Case Western Reserve University, Cleveland, Ohio 44106, USA
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30
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Kumbhar DD, Pokharkar VB. Engineering of a nanostructured lipid carrier for the poorly water-soluble drug, bicalutamide: Physicochemical investigations. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2012.10.031] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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31
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Aronis KN, Foo JP, Chamberland JP, Mantzoros CS. Secretion patterns of circulating osteoprotegerin and response to acute and chronic energy deprivation in young healthy adults. J Clin Endocrinol Metab 2012; 97:2765-72. [PMID: 22563105 PMCID: PMC3410259 DOI: 10.1210/jc.2012-1618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Osteoprotegerin (OPGN) is a bone-remodeling marker that is associated with various metabolic and vascular complications. Cross-sectional studies in humans have demonstrated an inverse association between leptin, a marker of energy sufficiency, and OPGN. The physiology of OPGN has not been fully elucidated to date. We thus aim to elucidate 1) whether OPGN levels exhibit any gender dimorphism or day/night secretion pattern; and 2) whether there is any effect of acute and/or chronic energy deprivation on its circulating levels and whether such effects are mediated through leptin. MATERIALS AND METHODS Study A: To evaluate OPGN secretion patterns and OPGN response to acute energy deprivation, we studied 12 healthy subjects under three different conditions for 72 h-in the isocaloric fed state, and during a fasting state with administration of either placebo or metreleptin in replacement doses. Blood samples were obtained every 15 min and pooled hourly during the last 24 h of the study. Study B: To evaluate the effect of chronic energy deprivation on OPGN secretion, we measured its levels in 14 obese subjects before and during weight loss after bariatric surgery. RESULTS OPGN levels exhibited a statistically significant (P < 0.01), albeit clinically limited in magnitude, day/night variation pattern in both genders (R(2) = 14.68%; 10.7-14.8% reduction with lower levels around 1600-1800 h; P < 0.01). Males had lower OPGN levels compared to females (1.81 ± 0.04 vs. 3.65 ± 0.07 pmol/liter; P < 0.001). Three days of fasting with either placebo or metreleptin administration did not change OPGN levels. OPGN levels did not change during bariatric surgery-induced weight loss. CONCLUSIONS OPGN levels are lower in men and exhibit a statistically significant, albeit clinically limited in magnitude, day/night secretion pattern. Neither acute nor chronic energy deprivation leading to significant weight loss has any effects on OPGN levels. Nomenclature Comment: Use of the terms "circadian" and "day/night variation" is meant as follows: Circadian pattern is a functional term that implies a rhythm that has been proven to be regulated by the innate circadian apparatus (anatomical and/or molecular). Conversely, day/night variation pattern is a descriptive term that refers to serum levels that vary during a day, usually in a periodic fashion. It is not known whether this variation is an innate property of the organ that secretes this hormone or whether it is determined by exogenous factors.
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Affiliation(s)
- Konstantinos N Aronis
- Division of Endocrinology, Department of Internal Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA
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32
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33
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Pokharkar VB, Malhi T, Mandpe L. Bicalutamide nanocrystals with improved oral bioavailability:in vitroandin vivoevaluation. Pharm Dev Technol 2012; 18:660-6. [DOI: 10.3109/10837450.2012.663391] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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34
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Abu-Diak OA, Jones DS, Andrews GP. Understanding the Performance of Melt-Extruded Poly(ethylene oxide)–Bicalutamide Solid Dispersions: Characterisation of Microstructural Properties Using Thermal, Spectroscopic and Drug Release Methods. J Pharm Sci 2012; 101:200-13. [DOI: 10.1002/jps.22748] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 07/18/2011] [Accepted: 08/12/2011] [Indexed: 11/06/2022]
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35
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Preparation and characterization of a novel polymorph of indiplon, Form α. Bioorg Med Chem Lett 2012; 22:963-8. [DOI: 10.1016/j.bmcl.2011.12.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 11/21/2011] [Accepted: 12/03/2011] [Indexed: 10/14/2022]
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36
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Liquid antisolvent precipitation process for solubility modulation of bicalutamide. ACTA PHARMACEUTICA 2011; 61:435-45. [PMID: 22202202 DOI: 10.2478/v10007-011-0036-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Liquid antisolvent process was explored as a solubility modulating tool. Bicalutamide, a poorly water soluble drug, was used as a candidate. Low aqueous solubility and poor dissolution of bicalutamide results into poor and variable bioavailability. Therefore, the objective of the present work was to modify the solubility of bicalutamide using the liquid antisolvent precipitation process. HPMC E5 and Poloxamer 407 were shortlisted as a hydrophilic polymer and surfactant, respectively, for the process. Process optimization was done with respect to the hydrophilic polymer, surfactant and drug loading concentration. The resultant microcrystals were characterized with various instrumental techniques for material characterization such as IR, DSC, SEM, XRD, particle size, specific surface area and dissolution kinetics.
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37
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Persson R, Nordholm S, Perlovich G, Lindfors L. Monte Carlo Studies of Drug Nucleation 1: Formation of Crystalline Clusters of Bicalutamide in Water. J Phys Chem B 2011; 115:3062-72. [DOI: 10.1021/jp111817h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rasmus Persson
- Department of Chemistry, University of Gothenburg, Sweden
| | - Sture Nordholm
- Department of Chemistry, University of Gothenburg, Sweden
| | - German Perlovich
- Institute of Solution Chemistry, Russian Academy of Science, Ivanovo, Russia
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38
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Formation of bicalutamide nanodispersion for dissolution rate enhancement. Int J Pharm 2010; 404:257-63. [PMID: 21093558 DOI: 10.1016/j.ijpharm.2010.11.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 10/15/2010] [Accepted: 11/11/2010] [Indexed: 11/21/2022]
Abstract
Bicalutamide was loaded on hydrophilic excipients to form nanodispersions via a combination of anti-solvent precipitation and spray drying method. The particle size, BET surface area, contact angles and dissolution rate of the nanodispersions were analyzed. The results indicated that lactose was a suitable matrix to prevent the bicalutamide particles growth and aggregation. The lactose loaded particles had a mean size of 330 nm within a narrow distribution. X-ray diffraction (XRD), differential scanning calorimetry (DSC) and Fourier transform infrared (FT-IR) characterization indicated the nanodispersion exhibited unchanged crystalline and chemical structure. Dissolution rate of bicalutamide nanodispersion was significantly faster than that of commercial products. It increased to 94% in 10 min while both commercial formulas Casodex and bicalutamide tablets dissolved 60% and 38% respectively at the same period. It was proposed that the enhanced dissolution rate of bicalutamide nanodispersion contribute to high surface area and well-wetted state of drug particles.
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39
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Andrews GP, AbuDiak OA, Jones DS. Physicochemical characterization of hot melt extruded bicalutamide-polyvinylpyrrolidone solid dispersions. J Pharm Sci 2010; 99:1322-35. [PMID: 19798757 DOI: 10.1002/jps.21914] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Solid molecular dispersions of bicalutamide (BL) and polyvinylpyrrolidone (PVP) were prepared by hot melt extrusion technology at drug-to-polymer ratios of 1:10, 2:10, and 3:10 (w/w). The solid-state properties of BL, physical mixtures of BL/PVP, and hot melt extrudates were characterized using differential scanning calorimetry (DSC), powder X-ray diffractometry (PXRD), Raman, and Fourier transform infrared (FTIR) spectroscopy. Drug dissolution studies were subsequently conducted on hot melt extruded solid dispersions and physical mixtures. All hot melt extrudates had a single T(g) between the T(g) of amorphous BL and PVP indicating miscibility of BL with PVP and the formation of solid molecular dispersions. PXRD confirmed the presence of the amorphous form of BL within the extrudates. Conversely, PXRD patterns recorded for physical mixtures showed sharp bands characteristic of crystalline BL, whereas DSC traces had a distinct endotherm at 196 degrees C corresponding to melting of crystalline BL. Further investigations using DSC confirmed solid-state plasticization of PVP by amorphous BL and hence antiplasticization of amorphous BL by PVP. Experimentally observed T(g) values of physical mixtures were shown to be significantly higher than those calculated using the Gordon-Taylor equation suggesting the formation of strong intermolecular interactions between BL and PVP. FTIR and Raman spectroscopy were used to investigate these interactions and strongly suggested the presence of secondary interaction between PVP and BL within the hot melt extrudates. The drug dissolution properties of hot melt extrudates were enhanced significantly in comparison to crystalline BL and physical mixtures. Moreover, the rate and extent of BL release were highly dependent on the amount of PVP present within the extrudate. Storage of the extrudates confirmed the stability of amorphous BL for up to 12 months at 20 degrees C, 40% RH whereas stability was reduced under highly humid conditions (20 degrees C, 65% RH). Interestingly, BL recrystallization after storage under these conditions had no effect on the dissolution properties of the extrudates.
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Affiliation(s)
- Gavin P Andrews
- The Drug Delivery and Biomaterials Group, School of Pharmacy, Medical Biology Centre, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, UK.
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40
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41
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Német Z, Sztatisz J, Demeter A. Polymorph transitions of bicalutamide: a remarkable example of mechanical activation. J Pharm Sci 2008; 97:3222-32. [PMID: 18085711 DOI: 10.1002/jps.21256] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Bicalutamide, an active pharmaceutical ingredient possessing antiandrogenic activity, is known to exhibit polymorphism. The higher melting Form I relates monotropically to the lower melting Form II. The amorphous form can be easily produced by quench cooling the melt, but it is known to crystallize spontaneously to Form II at room temperature within days. Our results show that crystallization of amorphous bicalutamide is greatly influenced by experimental conditions and sample treatment. The effect of mechanical activation on the polymorph transitions is investigated in detail. Seeds of Form I can be formed in the amorphous phase even due to gentle mechanical treatment, which results in crystallization to the more stable structure at elevated temperature. The crystalline Form II may as well be transformed to the stable modification through mechanical activation at elevated temperature.
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Affiliation(s)
- Zoltán Német
- Gedeon Richter Plc., Drug Polymorphism Research Division, P.O. Box 27, H-1475 Budapest, Hungary
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42
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Lindfors L, Forssén S, Westergren J, Olsson U. Nucleation and crystal growth in supersaturated solutions of a model drug. J Colloid Interface Sci 2008; 325:404-13. [DOI: 10.1016/j.jcis.2008.05.034] [Citation(s) in RCA: 181] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2008] [Revised: 05/14/2008] [Accepted: 05/20/2008] [Indexed: 11/29/2022]
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