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Iyer J, Morgan LM, Harrison P, Davis A, Ray A, Mitsche S, Hofer F, Saraf I, Paudel A. Applying Material Science Principles to Chemical Stability: Modelling Solid State Autoxidation in Mifepristone Containing Different Degrees of Crystal Disorder. J Pharm Sci 2023; 112:2463-2482. [PMID: 37031865 DOI: 10.1016/j.xphs.2023.03.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 04/11/2023]
Abstract
Ball-milling and harsh manufacturing processes often generate crystal disorder which have practical implications on the physical and chemical stabilities of solid drugs during subsequent storage, transport, and handling. The impact of the physical state of solid drugs, containing different degrees/levels of crystal disorder, on their autoxidative stability under storage has not been widely investigated. This study investigates the impact of differing degrees of crystal disorder on the autoxidation of Mifepristone (MFP) to develop a predictive (semi-empirical) stability model. Crystalline MFP was subjected to different durations of ambient ball milling, and the resulting disorder/ amorphous content was quantified using a partial least square (PLS) regression model based on Raman spectroscopy data. Samples of MFP milled to generate varying levels of disorder were subjected to a range of (accelerated) stability conditions, and periodically sampled to examine their recrystallization and degradation extents. Crystallinity was monitored by Raman spectroscopy, and the degradation was evaluated by liquid chromatography. The analyses of milled samples demonstrated a competition between recrystallization and degradation via autoxidation of MFP, to different extents depending on stability conditions/exposure time. The degradation kinetics were analyzed by accounting for the preceding amorphous content, and fitted with a diffusion model. An extended Arrhenius equation was used to predict the degradation of stored samples under long-term (25°C/60% RH) and accelerated (40°C/75% RH, 50°C/75% RH) stability conditions. This study highlights the utility of such a predictive stability model for identifying the autoxidative instability in non-crystalline/partially crystalline MFP, owing to the degradation of the amorphous phases. This study is particularly useful for identifying drug-product instability by leveraging the concept of material sciences.
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Affiliation(s)
- Jayant Iyer
- Research Center Pharmaceutical Engineering GmbH (RCPE), Graz 8010, Austria
| | - Lucy M Morgan
- Pfizer Worldwide Research, Development and Medical, Sandwich, Kent, CT13 9NJ, UK
| | - Pamela Harrison
- Oral Product Development, Pharmaceutical Technology and Development, operations, AstraZeneca, Macclesfield SK10 2NA, UK
| | - Adrian Davis
- Pfizer Worldwide Research, Development and Medical, Sandwich, Kent, CT13 9NJ, UK
| | - Andrew Ray
- New Modalities & Parenteral Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, UK
| | - Stefan Mitsche
- FELMI ZFE-Austrian Center for Electron Microscopy and Nanoanalysis Graz University of Technology, Graz 8010, Austria
| | - Ferdinand Hofer
- FELMI ZFE-Austrian Center for Electron Microscopy and Nanoanalysis Graz University of Technology, Graz 8010, Austria
| | - Isha Saraf
- Research Center Pharmaceutical Engineering GmbH (RCPE), Graz 8010, Austria
| | - Amrit Paudel
- Research Center Pharmaceutical Engineering GmbH (RCPE), Graz 8010, Austria; Graz University of Technology, Institute of Process and Particle Engineering, Graz 8010, Austria.
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Iyer J, Brunsteiner M, Modhave D, Paudel A. Role of Crystal Disorder and Mechanoactivation in Solid-State Stability of Pharmaceuticals. J Pharm Sci 2023; 112:1539-1565. [PMID: 36842482 DOI: 10.1016/j.xphs.2023.02.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/20/2023] [Accepted: 02/20/2023] [Indexed: 02/28/2023]
Abstract
Common energy-intensive processes applied in oral solid dosage development, such as milling, sieving, blending, compaction, etc. generate particles with surface and bulk crystal disorder. An intriguing aspect of the generated crystal disorder is its evolution and repercussion on the physical- and chemical stabilities of drugs. In this review, we firstly examine the existing literature on crystal disorder and its implications on solid-state stability of pharmaceuticals. Secondly, we discuss the key aspects related to the generation and evolution of crystal disorder, dynamics of the disordered/amorphous phase, analytical techniques to measure/quantify them, and approaches to model the disordering propensity from first principles. The main objective of this compilation is to provide special impetus to predict or model the chemical degradation(s) resulting from processing-induced manifestation in bulk solid manufacturing. Finally, a generic workflow is proposed that can be useful to investigate the relevance of crystal disorder on the degradation of pharmaceuticals during stability studies. The present review will cater to the requirements for developing physically- and chemically stable drugs, thereby enabling early and rational decision-making during candidate screening and in assessing degradation risks associated with formulations and processing.
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Affiliation(s)
- Jayant Iyer
- Research Center Pharmaceutical Engineering GmbH (RCPE), Graz, Austria
| | | | - Dattatray Modhave
- Research Center Pharmaceutical Engineering GmbH (RCPE), Graz, Austria
| | - Amrit Paudel
- Research Center Pharmaceutical Engineering GmbH (RCPE), Graz, Austria; Graz University of Technology, Institute of Process and Particle Engineering, Graz Austria.
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Liu J, Luo M, Lv S, Tao S, Wu Z, Yu L, Lin D, Huang L, Wu L, Liao X, Zi J, Lai X, Yuan Y, Zhang W, Yang L. Case Report: Reversible Hyperglycemia Following Rapamycin Treatment for Atypical Choroid Plexus Papilloma in an Infant. Front Endocrinol (Lausanne) 2022; 13:865913. [PMID: 35865311 PMCID: PMC9294177 DOI: 10.3389/fendo.2022.865913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 05/11/2022] [Indexed: 12/16/2022] Open
Abstract
In this study, atypical choroid plexus papilloma was treated with high-dose rapamycin for 17 days preoperatively in an infant. Rapamycin significantly reduced the blood supply to the tumor while reducing the tumor volume, and most of the tumor was resected successfully. However, the infant developed hyperglycemia related to the rapamycin dose, which was effectively controlled by adjusting the dose and applying insulin.
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Affiliation(s)
- Jiale Liu
- Department of Pediatric Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Minjie Luo
- Department of Pediatric Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Siyuan Lv
- Department of Pediatric Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Shaohua Tao
- Department of Pediatric Intensive Care Unit, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Zhu Wu
- Department of Pediatric Intensive Care Unit, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Lihua Yu
- Department of Pediatric Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Danna Lin
- Department of Pediatric Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Lulu Huang
- Department of Pediatric Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Li Wu
- Department of Pediatric Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xu Liao
- Department of Pediatric Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Juan Zi
- Department of Pediatric Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaorong Lai
- Department of Pediatric Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yuting Yuan
- Department of Pediatric Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Wangming Zhang
- Department of Pediatric Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- *Correspondence: Wangming Zhang, ; Lihua Yang,
| | - Lihua Yang
- Department of Pediatric Hematology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- *Correspondence: Wangming Zhang, ; Lihua Yang,
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Xu H, Xu X, Li S, Song WL, Yu DG, Annie Bligh SW. The Effect of Drug Heterogeneous Distributions within Core-Sheath Nanostructures on Its Sustained Release Profiles. Biomolecules 2021; 11:1330. [PMID: 34572545 PMCID: PMC8469915 DOI: 10.3390/biom11091330] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/05/2021] [Accepted: 09/07/2021] [Indexed: 12/17/2022] Open
Abstract
The sustained release of a water-soluble drug is always a key and important issue in pharmaceutics. In this study, using cellulose acetate (CA) as a biomacromolecular matrix, core-sheath nanofibers were developed for providing a sustained release of a model drug-metformin hydrochloride (MET). The core-sheath nanofibers were fabricated using modified tri-axial electrospinning, in which a detachable homemade spinneret was explored. A process-nanostructure-performance relationship was demonstrated through a series of characterizations. The prepared nanofibers F2 could release 95% of the loaded MET through a time period of 23.4 h and had no initial burst effect. The successful sustained release performances of MET can be attributed to the following factors: (1) the reasonable application of insoluble CA as the filament-forming carrier, which determined that the drug was released through a diffusion manner; (2) the core-sheath nanostructure provided the possibility of both encapsulating the drug completely and realizing the heterogeneous distributions of MET in the nanofibers with a higher drug load core than the sheath; (3) the thickness of the sheath sections were able to be exploited for further manipulating a better drug extended release performance. The mechanisms for manipulating the drug sustained release behaviors are proposed. The present proof-of-concept protocols can pave a new way to develop many novel biomolecule-based nanostructures for extending the release of water-soluble drugs.
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Affiliation(s)
- Haixia Xu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (H.X.); (X.X.); (S.L.); (W.-L.S.)
| | - Xizi Xu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (H.X.); (X.X.); (S.L.); (W.-L.S.)
| | - Siyu Li
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (H.X.); (X.X.); (S.L.); (W.-L.S.)
| | - Wen-Liang Song
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (H.X.); (X.X.); (S.L.); (W.-L.S.)
| | - Deng-Guang Yu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (H.X.); (X.X.); (S.L.); (W.-L.S.)
- Shanghai Engineering Technology Research Center for High-Performance Medical Device Materials, Shanghai 200093, China
| | - S. W. Annie Bligh
- School of Health Sciences, Caritas Institute of Higher Education, Hong Kong 999077, China
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