51
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Ueda K, Kanaya H, Higashi K, Yamamoto K, Moribe K. Molecular-level elucidation of saccharin-assisted rapid dissolution and high supersaturation level of drug from Eudragit® E solid dispersion. Int J Pharm 2018; 538:57-64. [DOI: 10.1016/j.ijpharm.2017.12.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 12/18/2017] [Accepted: 12/30/2017] [Indexed: 10/18/2022]
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52
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Kuroiwa Y, Higashi K, Ueda K, Yamamoto K, Moribe K. Nano-scale and molecular-level understanding of wet-milled indomethacin/poloxamer 407 nanosuspension with TEM, suspended-state NMR, and Raman measurements. Int J Pharm 2018; 537:30-39. [DOI: 10.1016/j.ijpharm.2017.12.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 12/04/2017] [Accepted: 12/11/2017] [Indexed: 01/24/2023]
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53
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Liu N, Higashi K, Ueda K, Moribe K. Effect of guest drug character encapsulated in the cavity and intermolecular spaces of γ-cyclodextrins on the dissolution property of ternary γ-cyclodextrin complex. Int J Pharm 2017; 531:543-549. [DOI: 10.1016/j.ijpharm.2017.04.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/17/2017] [Accepted: 04/21/2017] [Indexed: 12/25/2022]
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54
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Sekizawa O, Uruga T, Ishiguro N, Matsui H, Higashi K, Sakata T, Iwasawa Y, Tada M. In-situ X-ray nano-CT System for Polymer Electrolyte Fuel Cells under Operating Conditions. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/849/1/012022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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55
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Ueda K, Higashi K, Moribe K. Direct NMR Monitoring of Phase Separation Behavior of Highly Supersaturated Nifedipine Solution Stabilized with Hypromellose Derivatives. Mol Pharm 2017; 14:2314-2322. [PMID: 28558250 DOI: 10.1021/acs.molpharmaceut.7b00178] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We investigated the phase separation behavior and maintenance mechanism of the supersaturated state of poorly water-soluble nifedipine (NIF) in hypromellose (HPMC) derivative solutions. Highly supersaturated NIF formed NIF-rich nanodroplets through phase separation from aqueous solution containing HPMC derivative. Dissolvable NIF concentration in the bulk water phase was limited by the phase separation of NIF from the aqueous solution. HPMC derivatives stabilized the NIF-rich nanodroplets and maintained the NIF supersaturation with phase-separated NIF for several hours. The size of the NIF-rich phase was different depending on the HPMC derivatives dissolved in aqueous solution, although the droplet size had no correlation with the time for which NIF supersaturation was maintained without NIF crystallization. HPMC acetate and HPMC acetate succinate (HPMC-AS) effectively maintained the NIF supersaturation containing phase-separated NIF compared with HPMC. Furthermore, HPMC-AS stabilized NIF supersaturation more effectively in acidic conditions. Solution 1H NMR measurements of NIF-supersaturated solution revealed that HPMC derivatives distributed into the NIF-rich phase during the phase separation of NIF from the aqueous solution. The hydrophobicity of HPMC derivative strongly affected its distribution into the NIF-rich phase. Moreover, the distribution of HPMC-AS into the NIF-rich phase was promoted at lower pH due to the lower aqueous solubility of HPMC-AS. The distribution of a large amount of HPMC derivatives into NIF-rich phase induced the strong inhibition of NIF crystallization from the NIF-rich phase. Polymer distribution into the drug-rich phase directly monitored by solution NMR technique can be a useful index for the stabilization efficiency of drug-supersaturated solution containing a drug-rich phase.
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56
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Kinoshita R, Ohta T, Shiraki K, Higashi K, Moribe K. Effects of wet-granulation process parameters on the dissolution and physical stability of a solid dispersion. Int J Pharm 2017; 524:304-311. [DOI: 10.1016/j.ijpharm.2017.04.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 03/22/2017] [Accepted: 04/04/2017] [Indexed: 11/26/2022]
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57
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Aoki C, Takeuchi Y, Higashi K, Okamoto Y, Nakanishi A, Tandia M, Uzawa J, Ueda K, Moribe K. Structural elucidation of a novel transglycosylated compound α-glucosyl rhoifolin and of α-glucosyl rutin by NMR spectroscopy. Carbohydr Res 2017; 443-444:37-41. [DOI: 10.1016/j.carres.2017.03.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 03/11/2017] [Accepted: 03/11/2017] [Indexed: 11/15/2022]
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58
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Ohyagi N, Ueda K, Higashi K, Yamamoto K, Kawakami K, Moribe K. Synergetic Role of Hypromellose and Methacrylic Acid Copolymer in the Dissolution Improvement of Amorphous Solid Dispersions. J Pharm Sci 2017; 106:1042-1050. [DOI: 10.1016/j.xphs.2016.12.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 10/10/2016] [Accepted: 12/07/2016] [Indexed: 11/16/2022]
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59
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Fujimoto K, Ogawa M, Higashi K, Miki N. Micro-tube mass production device for microbial culture. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2017; 2016:481-484. [PMID: 28268376 DOI: 10.1109/embc.2016.7590744] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This paper describes mass production system of micro-tubes for microbial culture in an open environment. Microbes are used in many fields, such as food, medicine, environmental and energy. We proposed a microbe culture system using hydrogel micro-tubes, which can protect the target microbes inside from competitive microbes outside of the tubes while allow oxygen and nutrition to diffuse through. The hydrogel micro-tubes can be produced by a microfluidic device, which can precisely control the flow and therefore, the tube geometry. For practical applications of the micro-tube-based microbial culture, one of the biggest challenges is the scale-up of the micro-tube-based culture system, or mass production of the tubes. We developed a fluidic system that can produce multiple micro-tubes in parallel. We characterized the mass-produced micro channels and verified the effectiveness of the system.
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60
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Higashi K, Miki N. A simple method for micropatterning nanofibrous hydrogel film. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2017; 2016:145-148. [PMID: 28268300 DOI: 10.1109/embc.2016.7590661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This paper propose a new fabrication process for micropatterning a nanofibrous thin film made of bacterial cellulose(BC). BC is a hydrogel produced by specific bacteria and composed of pure cellulosic nanoflbers exhibiting 3D network structure. Such nanofibrous structure is found to be appropriate for adhesion of anchorage-dependent cells. Furthermore, BC shows high biocompatibility and mechanical toughness. Thus, the microfabrication technique for BC broadens potentials for applications. In this study, we report a new method for micropatterning BC film with feature resolution comparable with photolithography technology.
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61
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Higashi K, Mibu F, Saito K, Limwikrant W, Yamamoto K, Moribe K. Composition-dependent structural changes and antitumor activity of ASC-DP/DSPE-PEG nanoparticles. Eur J Pharm Sci 2017; 99:24-31. [DOI: 10.1016/j.ejps.2016.11.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 11/10/2016] [Accepted: 11/29/2016] [Indexed: 10/20/2022]
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62
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Ge D, Higashi K, Ito D, Nagano K, Ishikawa R, Terui Y, Higashi K, Moribe K, Linhardt RJ, Toida T. Poly-ion Complex of Chondroitin Sulfate and Spermine and Its Effect on Oral Chondroitin Sulfate Bioavailability. Chem Pharm Bull (Tokyo) 2017; 64:390-8. [PMID: 27150471 DOI: 10.1248/cpb.c15-00940] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Chondroitin sulfate (CS) has been accepted as an ingredient in health foods for the treatment of symptoms related to arthritis and cartilage repair. However, CS is poorly absorbed through the gastrointestinal tract because of its high negative electric charges and molecular weight (MW). In this study, poly-ion complex (PIC) formation was found in aqueous solutions through electrostatic interaction between CS and polyamines-organic molecules having two or more primary amino groups ubiquitously distributed in natural products at high concentrations. Characteristic properties of various PICs generated by mixing CS and natural polyamines, including unusual polyamines, were studied based on the turbidity for PIC formation, the dynamic light scattering for the size of PIC particles, and ζ-potential measurements for the surface charges of PIC particles. The efficiency of PIC formation between CS and spermine increased in a CS MW-dependent manner, with 15 kDa CS being critical for the formation of PIC (particle size: 3.41 µm) having nearly neutral surface charge (ζ-potential: -0.80 mV). Comparatively, mixing tetrakis(3-aminopropyl)ammonium and 15 kDa of CS afforded significant levels of PIC (particle size: 0.42±0.16 µm) despite a strongly negative surface charge (-34.67±1.15 mV). Interestingly, the oral absorption efficiency of CS was greatly improved only when PIC possessing neutral surface charges was administered to mice. High formation efficiency and electrically neutral surface charge of PIC particles are important factors for oral CS bioavailability.
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63
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Takayama H, Kitajima M, Morita A, Endo S, Kogure N, Higashi K, Moribe K. Design and Synthesis of 4-Chlorocolchicine-Derived Prodrug Capable of Forming Nanoparticles by Self-Assembly. HETEROCYCLES 2017. [DOI: 10.3987/com-16-s(s)51] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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64
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Higashi K, Takahashi N, Ueda K, Yamamoto K, Moribe K. PB-02AFM observation of morphological changes of doxorubicin-loaded liposomes. Microscopy (Oxf) 2016. [DOI: 10.1093/jmicro/dfw053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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65
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Kobayashi A, Takao M, Suzuki T, Higashi K, Shimamoto A, Shimpo H, Nakatsuka A, Tenpaku H, Yamakado K. F-166NEW HORIZON OF SURGICAL TREATMENTS IN PATIENTS WITH PULMONARY METASTASES: COMBINATION WITH RADIOFREQUENCY ABLATION. Interact Cardiovasc Thorac Surg 2016. [DOI: 10.1093/icvts/ivw260.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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66
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Fusama M, Yukioka K, Kuroiwa T, Yukioka C, Inoue M, Higashi K, Ogata A, Murata N, Kuritani T, Maeda K, Sano H, Yukioka M, Nakahara H. SAT0633-HPR Social Support May Be Important for Improving Patient Satisfaction and Health Status in Patients with Rheumatoid Arthritis Treated with Biologics. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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67
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Fusama M, Yukioka K, Kuroiwa T, Yukioka C, Inoue M, Higashi K, Ogata A, Murata N, Kuritani T, Maeda K, Sano H, Yukioka M, Nakahara H. SAT0632-HPR The Efficacy of Biologics on Health Status Including Psychological Status, Self-Efficacy and Patient Satisfaction in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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68
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Liu N, Higashi K, Kikuchi J, Ando S, Kameta N, Ding W, Masuda M, Shimizu T, Ueda K, Yamamoto K, Moribe K. Molecular-Level Understanding of the Encapsulation and Dissolution of Poorly Water-Soluble Ibuprofen by Functionalized Organic Nanotubes Using Solid-State NMR Spectroscopy. J Phys Chem B 2016; 120:4496-507. [DOI: 10.1021/acs.jpcb.6b00939] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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69
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Ueda K, Higashi K, Moribe K. Application of Solid-State NMR Relaxometry for Characterization and Formulation Optimization of Grinding-Induced Drug Nanoparticle. Mol Pharm 2016; 13:852-62. [DOI: 10.1021/acs.molpharmaceut.5b00781] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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70
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Takahashi N, Ueda K, Higashi K, Yamamoto K, Moribe K. Morphological changes of doxorubicin-loaded liposomes observed by atomic force microscopy. Asian J Pharm Sci 2016. [DOI: 10.1016/j.ajps.2015.10.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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71
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Kanaya H, Ueda K, Higashi K, Yamamoto K, Moribe K. Stabilization mechanism of nitrazepam supersaturated state in nitrazepam/Eudragit®EPO/saccharin solution revealed by NMR measurements. Asian J Pharm Sci 2016. [DOI: 10.1016/j.ajps.2015.10.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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72
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Higashi K, Miki N. Toad's egg-like cultivation process for forming microcarriers from nanofibrous hydrogel. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2015:5900-3. [PMID: 26737634 DOI: 10.1109/embc.2015.7319734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This paper proposes a new method for generating microcarries from bacterial cellulose (BC). BC, which is produced by specific bacteria, is a hydrogel composed of a three dimensional network structure formed by cellulose nanofibers. BC as an ECM-like nanofibrous material exhibits an excellent environment for cellular adhesion. Moreover, BC has a high biocompatibility and mechanical strength. From these properties, BC is expected to be applied for microcarriers, which is used for cultivating anchorage-dependent cells. Then, we developed a microfabrication process to create BC microcarriers by using gelatin microspheres as sacrificial architectures. In addition, the monodispersity of the formed BC microcarreirs was investigated.
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73
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Ogawa M, Higashi K, Miki N. Development of hydrogel microtubes for microbe culture in open environment. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2015:5896-9. [PMID: 26737633 DOI: 10.1109/embc.2015.7319733] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This paper describes a microbe culture system in an open environment using hydrogel microtubes. In recent years, oil production microbes, such as Aurantiochytrium, have been found and are studied to produce fuels of new age instead of fossil fuels. Biomass production by microbes is promising, where scale-up, collection of the products and competition against other microbes are the most important challenges. Here, we propose to use hydrogel microtubes to encapsulate, culture, and protect microbes. The tubes can be micro- and mass-fabricated. They allow oxygen and nutrition to go through while they prevent competitive microbes from intruding inside. The microbes and byproducts can be collected together with the tubes. In this paper, we demonstrate the proof-of-concepts experiments: we fabricated hydrogel micro tubes and cultured Coryne glutamicum which produce lactic acid inside the tubes. The microbes were increased inside the tubes and protected even when competitive microbes existed in the culture media. Furthermore, we demonstrated how to collect microbes inside the tubes.
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74
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Sasaoka S, Saito K, Higashi K, Limwikrant W, Moribe K, Suzuki S, Yamamoto K. Design of one-dimensional power spectrum using two-dimensional fast Fourier transform for discrimination of paper-based kraft tapes. Forensic Sci Int 2015; 257:329-336. [DOI: 10.1016/j.forsciint.2015.09.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/09/2015] [Accepted: 09/17/2015] [Indexed: 10/22/2022]
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75
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Ueda K, Higashi K, Yamamoto K, Moribe K. In situ molecular elucidation of drug supersaturation achieved by nano-sizing and amorphization of poorly water-soluble drug. Eur J Pharm Sci 2015; 77:79-89. [DOI: 10.1016/j.ejps.2015.05.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 05/14/2015] [Accepted: 05/29/2015] [Indexed: 10/23/2022]
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