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Ono T, Okada K, Tsuchiya M, Hayashi Y, Kumada S, Onuki Y. Continuous Monitoring of the Agglomeration and Sedimentation of Indomethacin Nanosuspensions Using T 2 Relaxation Time with Time-Domain NMR. Chem Pharm Bull (Tokyo) 2023; 71:665-669. [PMID: 37532537 DOI: 10.1248/cpb.c23-00207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
The time-domain NMR technique was utilized to monitor precisely the physicochemical stability of indomethacin (IMC) nanosuspensions using T2 relaxation time (T2). We investigated whether T2 values can distinguish between agglomeration and sedimentation. Nanosuspensions of IMC were prepared using aqueous wet bead milling with polyvinylpyrrolidone as a stabilizer. Prepared nanosuspensions were divided into two fractions: one was stored in the NMR equipment for continuous T2 measurements and the other was stored in the dispersion analyzer. Measurements of both nanosuspensions were carried out, without dilution, over a period of 24 h at 10-min intervals. Transmission profiles based on multilight scattering technology showed that agglomeration predominantly occurred at 25 and 35 °C immediately after wet bead milling up to 4 h, followed by sedimentation from 4 to 24 h. Upon measuring the T2 relaxation, T2 values at both 25 and 35 °C showed a two-step change-there was a significant prolongation in T2 values immediately after preparation of nanosuspensions up to approx. 4 h and a gradual prolongation in T2 values from approx. 4 to 24 h. Considering the results of transmission profiles, these two-step T2 changes correspond to agglomeration and sedimentation. In other words, this study established that monitoring the T2 values of nanosuspensions could be used to evaluate the agglomeration and sedimentation of contained drug particles. This technique does not directly observe the nanoparticles themselves, but the water molecules. Thus, measurement of T2 relaxation is considered to be a general-purpose technique, independent of the type of drug or polymer.
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Affiliation(s)
- Takashi Ono
- Laboratory of Pharmaceutical Technology, School of Pharmacy and Pharmaceutical Sciences, University of Toyama
- Formulation Development Department, Development & Planning Division, Nichi-Iko Pharmaceutical Co., Ltd
| | - Kotaro Okada
- Laboratory of Pharmaceutical Technology, School of Pharmacy and Pharmaceutical Sciences, University of Toyama
| | - Megumi Tsuchiya
- Laboratory of Pharmaceutical Technology, School of Pharmacy and Pharmaceutical Sciences, University of Toyama
| | - Yoshihiro Hayashi
- Formulation Development Department, Development & Planning Division, Nichi-Iko Pharmaceutical Co., Ltd
| | - Shungo Kumada
- Formulation Development Department, Development & Planning Division, Nichi-Iko Pharmaceutical Co., Ltd
| | - Yoshinori Onuki
- Laboratory of Pharmaceutical Technology, School of Pharmacy and Pharmaceutical Sciences, University of Toyama
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Kang JH, Chun MH, Cho MS, Kwon YB, Choi JC, Kim DW, Park CW, Park ES. Preparation and characterization of metformin hydrochloride controlled-release tablet using fatty acid coated granules. Drug Dev Ind Pharm 2020; 46:852-860. [PMID: 32338551 DOI: 10.1080/03639045.2020.1762198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Metformin hydrochloride (MFM) is often used as a controlled-release (CR) tablet to reduce dosing frequency. However, the MFM CR tablet contains significant amounts of excipients and the tablet size is also large. Dosing convenience and patient compliance can be increased by reducing the size of the CR tablets. The aim of this study was to prepare and evaluate the MFM controlled-release tablet (MFM-CRT) using two types of release modulators, inner and outer. The MFM-CRT was prepared by coating the MFM granules using a binder solution containing aluminum stearate (ALS) as the inner release-modulator, and polyethylene oxide (PEO) as the outer release-modulator. The dispersion stability of the binder solution was optimized by the dispersion analyzer. The MFM-CRT was evaluated for dissolution rate and tablet volume. Additionally, dissolution behavior and dissolution kinetics of the MFM-CRT were analyzed using micro-computed tomography (micro-CT). Although the optimal MFM-CRT showed no difference in the release rate as compared to the commercially available product of Glucophage® XR 500 mg (f2 value: 72), the length of the long axis was reduced by 6 mm and the weight was reduced by about 27%. We expect patient compliance to improve because of effective sustained release and volume reduction of MFM-CRT.
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Affiliation(s)
- Ji-Hyun Kang
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
| | - Myung-Hee Chun
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea.,KyungDong Pharmaceutical Co., Ltd, Hwaseong, Republic of Korea
| | - Mi-Seo Cho
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
| | - Yong-Bin Kwon
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
| | - Jae-Cheol Choi
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
| | - Dong-Wook Kim
- Department of Pharmaceutical Engineering, Cheongju University, Cheongju, Republic of Korea
| | - Chun-Woong Park
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
| | - Eun-Seok Park
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
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Zielińska A, Ferreira NR, Durazzo A, Lucarini M, Cicero N, Mamouni SE, Silva AM, Nowak I, Santini A, Souto EB. Development and Optimization of Alpha-Pinene-Loaded Solid Lipid Nanoparticles (SLN) Using Experimental Factorial Design and Dispersion Analysis. Molecules 2019; 24:E2683. [PMID: 31344802 PMCID: PMC6696006 DOI: 10.3390/molecules24152683] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 07/16/2019] [Accepted: 07/23/2019] [Indexed: 11/20/2022] Open
Abstract
The encapsulation of bicyclic monoterpene α-pinene into solid lipid nanoparticles (SLN) is reported using experimental factorial design, followed by high-end dispersion analyzer LUMiSizer®. This equipment allows the characterization of the α-pinene-loaded SLN instability phenomena (e.g., sedimentation, flotation or coagulation), as well as the determination of the velocity distribution in the centrifugal field and the particle size distribution. In this work, SLN were produced by hot high-pressure homogenization technique. The influence of the independent variables, surfactant and lipid ratio on the physicochemical properties of SLN, such as mean particle size (Z-Ave), polydispersity index (PDI) and zeta potential (ZP), was estimated using a 22-factorial design. The Z-Ave and PDI were analyzed by dynamic light scattering, while ZP measurements were recorded by electrophoretic light scattering. Based on the obtained results, the optimal SLN dispersion was composed of 1 wt.% of α-pinene, 4 wt.% of solid lipid (Imwitor® 900 K) and 2.5 wt.% of surfactant (Poloxamer 188), depicting 136.7 nm of Z-Ave, 0.170 of PDI and 0 mV of ZP. Furthermore, LUMISizer® has been successfully used in the stability analysis of α-pinene-loaded SLN.
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Affiliation(s)
- Aleksandra Zielińska
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra (FFUC), Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, 61-712 Poznań, Poland
| | - Nuno R Ferreira
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra (FFUC), Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Alessandra Durazzo
- CREA-Research Centre for Food and Nutrition, Via Ardeatina 546, 00178 Rome, Italy
| | - Massimo Lucarini
- CREA-Research Centre for Food and Nutrition, Via Ardeatina 546, 00178 Rome, Italy
| | - Nicola Cicero
- Dipartimento di Scienze biomediche, odontoiatriche e delle immagini morfologiche e funzionali, Università degli Studi di Messina, Polo Universitario Annunziata, 98168 Messina, Italy
| | - Soukaina El Mamouni
- Department of Pharmacy, University of Napoli Federico II, 80138 Napoli NA, Italy
| | - Amélia M Silva
- Department of Biology and Environment, University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, P-5001-801 Vila Real, Portugal
- Centre for Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes e Alto Douro (UTAD), P-5001-801 Vila Real, Portugal
| | - Izabela Nowak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, 61-712 Poznań, Poland
| | - Antonello Santini
- Department of Pharmacy, University of Napoli Federico II, 80138 Napoli NA, Italy.
| | - Eliana B Souto
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra (FFUC), Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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