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Fathi-Karkan S, Amiri Ramsheh N, Arkaban H, Narooie-Noori F, Sargazi S, Mirinejad S, Roostaee M, Sargazi S, Barani M, Malahat Shadman S, Althomali RH, Rahman MM. Nanosuspensions in ophthalmology: Overcoming challenges and enhancing drug delivery for eye diseases. Int J Pharm 2024; 658:124226. [PMID: 38744414 DOI: 10.1016/j.ijpharm.2024.124226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 04/30/2024] [Accepted: 05/11/2024] [Indexed: 05/16/2024]
Abstract
This review article provides a comprehensive overview of the advancements in using nanosuspensions for controlled drug delivery in ophthalmology. It highlights the significance of ophthalmic drug delivery due to the prevalence of eye diseases and delves into various aspects of this field. The article explores molecular mechanisms, drugs used, and physiological factors affecting drug absorption. It also addresses challenges in treating both anterior and posterior eye segments and investigates the role of mucus in obstructing micro- and nanosuspensions. Nanosuspensions are presented as a promising approach to enhance drug solubility and absorption, covering formulation, stability, properties, and functionalization. The review discusses the pros and cons of using nanosuspensions for ocular drug delivery and covers their structure, preparation, characterization, and applications. Several graphical representations illustrate their role in treating various eye conditions. Specific drug categories like anti-inflammatory drugs, antihistamines, glucocorticoids, and more are discussed in detail, with relevant studies. The article also addresses current challenges and future directions, emphasizing the need for improved nanosuspension stability and exploring potential technologies. Nanosuspensions have shown substantial potential in advancing ophthalmic drug delivery by enhancing solubility and absorption. This article is a valuable resource for researchers, clinicians, and pharmaceutical professionals in this field, offering insights into recent developments, challenges, and future prospects in nanosuspension use for ocular drug delivery.
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Affiliation(s)
- Sonia Fathi-Karkan
- Natural Products and Medicinal Plants Research Center, North Khorasan University of Medical Sciences, Bojnurd 94531-55166, Iran; Department of Advanced Sciences and Technologies in Medicine, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd 9414974877, Iran.
| | - Nasim Amiri Ramsheh
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, 16846, Tehran, Iran.
| | - Hasan Arkaban
- Department of Chemistry, University of Isfahan, Isfahan 8174673441, Iran.
| | - Foroozan Narooie-Noori
- Optometry Department, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
| | - Sara Sargazi
- Cellular and Molecular Research Center, Research Institute of Cellular and Molecular Sciences in Infectious Diseases, Zahedan University of Medical Sciences, Zahedan, Iran.
| | - Shekoufeh Mirinejad
- Cellular and Molecular Research Center, Research Institute of Cellular and Molecular Sciences in Infectious Diseases, Zahedan University of Medical Sciences, Zahedan, Iran.
| | - Maryam Roostaee
- Department of Chemistry, Faculty of Sciences, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
| | - Saman Sargazi
- Cellular and Molecular Research Center, Research Institute of Cellular and Molecular Sciences in Infectious Diseases, Zahedan University of Medical Sciences, Zahedan, Iran; Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran.
| | - Mahmood Barani
- Department of Chemistry, Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr 75168, Iran.
| | | | - Raed H Althomali
- Department of Chemistry, College of Art and Science, Prince Sattam bin Abdulaziz University, Wadi Al-Dawasir 11991, Al Kharj, Saudi Arabia.
| | - Mohammed M Rahman
- Center of Excellence for Advanced Materials Research (CEAMR) & Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
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Masuda S, Deguchi S, Ogata F, Yoshitomi J, Otake H, Kanai K, Kawasaki N, Nagai N. Nasal Absorption Enhancement of Mometasone Furoate Nanocrystal Dispersions. Int J Nanomedicine 2023; 18:5685-5699. [PMID: 37841023 PMCID: PMC10573391 DOI: 10.2147/ijn.s430952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/05/2023] [Indexed: 10/17/2023] Open
Abstract
Purpose We designed a 0.05% mometasone furoate (MF) nanocrystal dispersion and investigated whether the application of MF nanocrystals in nasal formulations enhanced local absorption compared to traditional nasal MF formulations (CA-MF). Methods MF nanocrystal dispersions (MF-NPs) were prepared by bead milling MF microcrystal dispersions (MF-MPs) consisting of MF, 2-hydroxypropyl-β-cyclodextrin, methylcellulose, and purified water. Pluronic F-127 combined with methylcellulose, Pluronic F-68, or carbopol was used as a base for in situ gelation (thickener). MF concentrations were measured using high-performance liquid chromatography, and nasal absorption of MF was evaluated in 6 week-old male Institute of Cancer Research (ICR) mice. Results The particle size range of MF prepared with the bead mill treatment was 80-200 nm, and the nanoparticles increased the local absorption of MF, which was higher than that of CA-MF and MF-MPs. In addition, unlike the results obtained in the small intestine and corneal tissue, the high absorption of nanocrystalline MF in the nasal mucosa was related to a pathway that was not derived from energy-dependent endocytosis. Moreover, the application of the in situ gelling system attenuated the local absorption of MF-NPs, owing to a decrease in drug diffusion in the dispersions. Conclusion We found that nanoparticulation of MF enhances local intranasal absorption, and nasal bioavailability is higher than that of CA-MF. In addition, we demonstrate that viscosity regulation is an important factor in the design of nasal formulations based on MF nanocrystals. These findings provide insights for the design of novel nanomedicines with enhanced nasal bioavailability.
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Affiliation(s)
- Shuya Masuda
- Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Saori Deguchi
- Faculty of Pharmacy, Kindai University, Osaka, Japan
| | | | | | - Hiroko Otake
- Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Kazutaka Kanai
- Department of Small Animal Internal Medicine, School of Veterinary Medicine, University of Kitasato, Aomori, Japan
| | | | - Noriaki Nagai
- Faculty of Pharmacy, Kindai University, Osaka, Japan
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Chen X, Yang R, Shen J, Huang Q, Wu Z. Research Progress of Bioinspired Nanostructured Systems for the Treatment of Ocular Disorders. Pharmaceuticals (Basel) 2023; 16:ph16010096. [PMID: 36678597 PMCID: PMC9865244 DOI: 10.3390/ph16010096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 12/30/2022] [Accepted: 01/06/2023] [Indexed: 01/12/2023] Open
Abstract
How to enhance the bioavailability and prolong the residence time of drugs in the eye present the major barriers to traditional eye delivery. Nanotechnology has been widely used in ocular drug delivery systems because of its advantages of minimizing adverse reactions, decreasing the frequency of administration, prolonging the release time, and improving the bioavailability of the drug in the eye. As natural product-based nanostructured systems, bioinspired nanostructured systems have presented as less toxic, easy to prepare, and cost-effective and have potential application value in the field of nanotechnology. A systematic classification of bioinspired nanostructured systems based on their inspiration source and formulation and their brief applications in disease are presented here. A review of recent research progress of the bioinspired nanostructured systems for the treatment of the anterior and posterior segment of ocular disorders is then presented in detail. Finally, current challenges and future directions with regard to manufacturing bioinspired nanomaterials are provided.
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Affiliation(s)
- Xuan Chen
- Department of Ophthalmology, Wuxi Second People’s Hospital, Nanjing Medical University, Wuxi 214002, China
| | - Rui Yang
- Research Institute for Reproductive Health and Genetic Diseases, Wuxi Maternity and Child Health Care Hospital, Wuxi School of Medicine, Jiangnan University, Wuxi 214002, China
- Correspondence: (R.Y.); (Z.W.)
| | - Jinyan Shen
- Department of Ophthalmology, Wuxi Second People’s Hospital, Nanjing Medical University, Wuxi 214002, China
| | - Qingyu Huang
- Department of Ophthalmology, Wuxi Second People’s Hospital, Nanjing Medical University, Wuxi 214002, China
| | - Zhifeng Wu
- Department of Ophthalmology, Wuxi Second People’s Hospital, Nanjing Medical University, Wuxi 214002, China
- Department of Ophthalmology, Affiliated Wuxi Clinical College of Nantong University, Wuxi 214002, China
- Correspondence: (R.Y.); (Z.W.)
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Vivero-Lopez M, Sparacino C, Quelle-Regaldie A, Sánchez L, Candal E, Barreiro-Iglesias A, Huete-Toral F, Carracedo G, Otero A, Concheiro A, Alvarez-Lorenzo C. Pluronic®/casein micelles for ophthalmic delivery of resveratrol: In vitro, ex vivo, and in vivo tests. Int J Pharm 2022; 628:122281. [DOI: 10.1016/j.ijpharm.2022.122281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 10/03/2022] [Accepted: 10/07/2022] [Indexed: 10/31/2022]
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Wang A, Dong L, Guo Z, Sun W, Mi S. A methacrylated hyaluronic acid network reinforced Pluronic F-127 gel for treatment of bacterial keratitis. Biomed Mater 2022; 17. [PMID: 35545060 DOI: 10.1088/1748-605x/ac6ea9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 05/11/2022] [Indexed: 11/12/2022]
Abstract
In this study, we developed a novel in situ thermoresponsive gel by introducing crosslinked methacrylated hyaluronic acid (HA-MA) networks into Pluronic F-127 (PF-127) gel (HP gel) to achieve levofloxacin (LFX) delivery in bacterial keratitis treatment. The interactions between PF-127 and HA-MA networks were studied by scanning electron microscopy, rheology, dynamic light scattering, differential scanning calorimetry, and small angle X-ray scattering. The results showed that the HP gel exhibited a higher critical gelling temperature and lower viscosity than the PF-127 gel (P gel), and could form a uniform thin layer on the ocular surface. Moreover, the drug release profile and gel dissolution rate revealed that the HA-MA network could retard the diffusion and dissolution of drug molecules and prolong the drug release time, which corresponded to an enhanced antibacterial ability of the HP-LFX gel. Furthermore, the HP gel exhibited low cytotoxicity to human corneal epithelial cells (HCECs). Finally, an in vivo pharmacodynamic study was conducted with rabbit keratitis models. An improved treatment efficacy was observed after application of the HP-LFX gels. This study highlights the potential of HP gels in ophthalmic drug delivery.
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Affiliation(s)
- Anyang Wang
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China, Shenzhen, 518055, CHINA
| | - Lina Dong
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, University of California Berkeley Tsinghua-Berkeley Shenzhen Institute, Energy & Enviromental Building, room 1112, Shenzhen, 518055, CHINA
| | - Zhongwei Guo
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China, Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, P.R. China, Shenzhen, 518055, CHINA
| | - Wei Sun
- Tsinghua University, Tsinghua University, Beijing, Beijing, 100084, CHINA
| | - Shengli Mi
- Graduate School at Shenzhen, Tsinghua University, Room 102, Building J, University Town, Shenzhen 518055, P.R.CHINA, shenzhen, 518055, CHINA
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Drug Nanocrystals: Focus on Brain Delivery from Therapeutic to Diagnostic Applications. Pharmaceutics 2022; 14:pharmaceutics14040691. [PMID: 35456525 PMCID: PMC9024479 DOI: 10.3390/pharmaceutics14040691] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/10/2022] [Accepted: 03/15/2022] [Indexed: 02/01/2023] Open
Abstract
The development of new drugs is often hindered by low solubility in water, a problem common to nearly 90% of natural and/or synthetic molecules in the discovery pipeline. Nanocrystalline drug technology involves the reduction in the bulk particle size down to the nanosize range, thus modifying its physico-chemical properties with beneficial effects on drug bioavailability. Nanocrystals (NCs) are carrier-free drug particles surrounded by a stabilizer and suspended in an aqueous medium. Due to high drug loading, NCs maintain a potent therapeutic concentration to produce desirable pharmacological action, particularly useful in the treatment of central nervous system (CNS) diseases. In addition to the therapeutic purpose, NC technology can be applied for diagnostic scope. This review aims to provide an overview of NC application by different administration routes, especially focusing on brain targeting, and with a particular attention to therapeutic and diagnostic fields. NC therapeutic applications are analyzed for the most common CNS pathologies (i.e., Parkinson’s disease, psychosis, Alzheimer’s disease, etc.). Recently, a growing interest has emerged from the use of colloidal fluorescent NCs for brain diagnostics. Therefore, the use of NCs in the imaging of brain vessels and tumor cells is also discussed. Finally, the clinical effectiveness of NCs is leading to an increasing number of FDA-approved products, among which the NCs approved for neurological disorders have increased.
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Platelet Lysate as a Promising Medium for Nanocarriers in the Management and Treatment of Ocular Diseases. CURRENT OPHTHALMOLOGY REPORTS 2022. [DOI: 10.1007/s40135-022-00285-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Goto R, Yamada S, Otake H, Nakazawa Y, Oka M, Yamamoto N, Sasaki H, Nagai N. Instillation of Ophthalmic Formulation Containing Nilvadipine Nanocrystals Attenuates Lens Opacification in Shumiya Cataract Rats. Pharmaceutics 2021; 13:pharmaceutics13121999. [PMID: 34959281 PMCID: PMC8709220 DOI: 10.3390/pharmaceutics13121999] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/19/2021] [Accepted: 11/22/2021] [Indexed: 11/23/2022] Open
Abstract
We developed ophthalmic formulations based on nilvadipine (NIL) nanocrystals (NIL-NP dispersions; mean particle size: 98 nm) by using bead mill treatment and investigated whether the instillation of NIL-NP dispersions delivers NIL to the lens and prevents lens opacification in hereditary cataractous Shumiya cataract rats (SCRs). Serious corneal stimulation was not detected in either human corneal epithelial cells or rats treated with NIL-NP dispersions. The NIL was directly delivered to the lens by the instillation of NIL-NP dispersions, and NIL content in the lenses of rats instilled with NIL-NP dispersions was significantly higher than that in the ophthalmic formulations based on NIL microcrystals (NIL-MP dispersions; mean particle size: 21 µm). Moreover, the supply of NIL prevented increases in Ca2+ content and calpain activity in the lenses of SCRs and delayed the onset of cataracts. In addition, the anti-cataract effect in the lens of rats instilled with NIL-NP dispersions was also significantly higher than that in NIL-MP dispersions. NIL-NPs could be used to prevent lens opacification.
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Affiliation(s)
- Ryoka Goto
- Faculty of Pharmacy, Kindai University, Kowakae, Higashi-Osaka 577-8502, Osaka, Japan; (R.G.); (S.Y.); (H.O.)
| | - Shigehiro Yamada
- Faculty of Pharmacy, Kindai University, Kowakae, Higashi-Osaka 577-8502, Osaka, Japan; (R.G.); (S.Y.); (H.O.)
| | - Hiroko Otake
- Faculty of Pharmacy, Kindai University, Kowakae, Higashi-Osaka 577-8502, Osaka, Japan; (R.G.); (S.Y.); (H.O.)
| | - Yosuke Nakazawa
- Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan;
| | - Mikako Oka
- Laboratory of Clinical Pharmacology, Yokohama University of Pharmacy, Yokohama 245-0066, Kanagawa, Japan;
| | - Naoki Yamamoto
- Center for Clinical Trial and Research Support, Fujita Health University, Research Promotion and Support Headquarters, Toyoake 470-1192, Aichi, Japan;
| | - Hiroshi Sasaki
- Department of Ophthalmology, Kanazawa Medical University, Kahoku 920-0293, Ishikawa, Japan;
| | - Noriaki Nagai
- Faculty of Pharmacy, Kindai University, Kowakae, Higashi-Osaka 577-8502, Osaka, Japan; (R.G.); (S.Y.); (H.O.)
- Correspondence: ; Tel.: +81-6-4307-3638
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9
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Balance of Drug Residence and Diffusion in Lacrimal Fluid Determine Ocular Bioavailability in In Situ Gels Incorporating Tranilast Nanoparticles. Pharmaceutics 2021; 13:pharmaceutics13091425. [PMID: 34575501 PMCID: PMC8466670 DOI: 10.3390/pharmaceutics13091425] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 11/16/2022] Open
Abstract
We previously designed ophthalmic formulations (nTRA) containing tranilast nanoparticles (Tra-NPs) with high uptake into ocular tissues. In this study, we used in situ gel (ISG) bases comprising combinations of pluronic F127 (F127) and methylcellulose (MC/F127), pluronic F68 (F68/F127), and Carbopol (Car/F127), and we developed in situ gels incorporating Tra-NPs (Tra-NP-incorporated ISNGs) such as nTRA-F127, nTRA-MC/F127, nTRA-F68/F127, and nTRA-Car/F127. Moreover, we demonstrated the therapeutic effect on conjunctival inflammation using lipopolysaccharide-induced rats. Each Tra-NP-incorporated ISNG was prepared by the bead mill method, the particle size was 40–190 nm, and the tranilast release and diffusion from formulation were nTRA > nTRA-F127 > nTRA-F68/F127 > nTRA-Car/F127 > nTRA-MC/F127. In the Tra-NP-incorporated ISNGs, the tranilast residence time in the lacrimal fluid, cornea, and conjunctiva was prolonged, although the Cmax was attenuated in comparison with nTRA. On the other hand, no significant difference in conjunctival inflammation between non- and nTRA-F127-instilled rats was found; however, the nTRA-F68/F127, nTRA-Car/F127, and nTRA-MC/F127 (combination-ISG) attenuated the vessel leakage, nitric oxide, and tumor necrosis factor-α expression. In particular, nTRA-F68/F127 was significant in preventing the conjunctival inflammation. In conclusion, we found that the combination-ISG base prolonged the residence time of Tra-NPs; however, Tra-NP release from the formulation was attenuated, and the Tmax was delayed longer than that in nTRA. The balance of drug residence and diffusion in lacrimal fluid may be important in providing high ocular bioavailability in formulations containing solid nanoparticles.
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Development of In-Situ Spray for Local Delivery of Antibacterial Drug for Hidradenitis Suppurativa: Investigation of Alternative Formulation. Polymers (Basel) 2021; 13:polym13162770. [PMID: 34451309 PMCID: PMC8397977 DOI: 10.3390/polym13162770] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/07/2021] [Accepted: 08/10/2021] [Indexed: 12/16/2022] Open
Abstract
Hidradenitis suppurativa (HS) has been considered an orphan disease with limited treatments available. The available topical treatment for this condition is clindamycin lotion; however, short retention and frequent application are the main setbacks. Thus, the present study aimed to attain an optimized antibacterial in situ spray formulation for the hidradenitis suppurativa skin condition, which gels once in contact with the skin surface at around 37 °C and possesses bioadhesion as well as sustained-release properties of the incorporated drug. Different concentrations of thermo-reversible gelling polymer, Pluronic F-127, were investigated along with the selected bioadhesive polymers, HPMC and SA. The optimized formulation F3 consisting of 18% Pluronic F-127 with 0.2% HPMC and 0.2% SA was characterized based on various physicochemical properties. The gelation temperature of F3 was found to be 29.0 ± 0.50 °C with a gelation time of 1.35 ± 0.40 min and a pH of 5.8. F3 had the viscosity of 178.50 ± 5.50 cP at 25 °C and 7800 ± 200 cP at 37 °C as the gel set. The optimized formulation was found to be bioadhesive and cytocompatible. Cumulative drug release was 65.05% within the time-frame of 8 h; the release pattern of the drug followed zero-order kinetics with the Higuchi release mechanism. The average zone of inhibition was found to be 43.44 ± 1.34 mm. The properties of F3 formulation reflect to improve residence time at the site of application and can enhance sustained drug release. Therefore, it could be concluded that optimized formulation has better retention and enhanced antimicrobial activity for superior efficacy against HS.
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Wang P, Wang JW, Zhang WH, Bai H, Tang G, Young DJ. In Vitro Anticancer Activity of Nanoformulated Mono- and Di-nuclear Pt Compounds. Chem Asian J 2021; 16:2993-3000. [PMID: 34387027 DOI: 10.1002/asia.202100901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Indexed: 12/14/2022]
Abstract
Nanoformulations of mononuclear Pt complexes cis-PtCl2 (PPh3 )2 (1), [Pt(PPh3 )2 (L-Cys)] ⋅ H2 O (3, L-Cys=L-cysteinate), trans-PtCl2 (PPh2 PhNMe2 )2 (4; PPh2 PhNMe2 =4-(dimethylamine)triphenylphosphine), trans-PtI2 (PPh2 PhNMe2 )2 (5) and dinuclear Pt cluster Pt2 (μ-S)2 (PPh3 )4 (2) have comparable cytotoxicity to cisplatin against murine melanoma cell line B16F10. Masking of these discrete molecular entities within the hydrophobic core of Pluronic® F-127 significantly boosted their solubility and stability, ensuring efficient cellular uptake, giving in vitro IC50 values in the range of 0.87-11.23 μM. These results highlight the potential therapeutic value of Pt complexes featuring stable Pt-P bonds in nanocomposite formulations with biocompatible amphiphilic polymers.
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Affiliation(s)
- Pan Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Jian-Wei Wang
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - Wen-Hua Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Hongzhen Bai
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - Guping Tang
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - David J Young
- College of Engineering Information Technology & Environment, Charles Darwin University, Darwin, Northern Territory, 0909, Australia
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Deguchi S, Ogata F, Isaka T, Otake H, Nakazawa Y, Kawasaki N, Nagai N. Prevention of Postprandial Hyperglycemia by Ophthalmic Nanoparticles Based on Protamine Zinc Insulin in the Rabbit. Pharmaceutics 2021; 13:pharmaceutics13030375. [PMID: 33809008 PMCID: PMC8000746 DOI: 10.3390/pharmaceutics13030375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 11/16/2022] Open
Abstract
Postprandial hyperglycemia, a so-called blood glucose spike, is associated with enhanced risks of diabetes mellitus (DM) and its complications. In this study, we attempted to design nanoparticles (NPs) of protamine zinc insulin (PZI) by the bead mill method, and prepare ophthalmic formulations based on the PZI-NPs with (nPZI/P) or without polyacrylic acid (nPZI). In addition, we investigated whether the instillation of the newly developed nPZI and nPZI/P can prevent postprandial hyperglycemia in a rabbit model involving the oral glucose tolerance test (OGTT). The particle size of PZI was decreased by the bead mill to a range for both nPZI and nPZI/P of 80-550 nm with no observable aggregation for 6 d. Neither nPZI nor nPZI/P caused any noticeable corneal toxicity. The plasma INS levels in rabbits instilled with nPZI were significantly higher than in rabbits instilled with INS suspensions (commercially available formulations, CA-INS), and the plasma INS levels were further enhanced with the amount of polyacrylic acid in the nPZI/P. In addition, the rapid rise in plasma glucose levels in OGTT-treated rabbits was prevented by a single instillation of nPZI/P, which was significantly more effective at attenuating postprandial hyperglycemia (blood glucose spike) in comparison with nPZI. In conclusion, we designed nPZI/P, and show that a single instillation before OGTT attenuates the rapid enhancement of plasma glucose levels. These findings suggest a better management strategy for the postprandial blood glucose spike, which is an important target of DM therapy.
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Affiliation(s)
- Saori Deguchi
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (S.D.); (F.O.); (T.I.); (H.O.); (N.K.)
| | - Fumihiko Ogata
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (S.D.); (F.O.); (T.I.); (H.O.); (N.K.)
| | - Takumi Isaka
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (S.D.); (F.O.); (T.I.); (H.O.); (N.K.)
| | - Hiroko Otake
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (S.D.); (F.O.); (T.I.); (H.O.); (N.K.)
| | - Yosuke Nakazawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan;
| | - Naohito Kawasaki
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (S.D.); (F.O.); (T.I.); (H.O.); (N.K.)
| | - Noriaki Nagai
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (S.D.); (F.O.); (T.I.); (H.O.); (N.K.)
- Correspondence: ; Tel.: +81-6-4307-3638
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Nagai N, Sakurai S, Seiriki R, Minami M, Yamaguchi M, Deguchi S, Harata E. MPC Polymer Promotes Recovery from Dry Eye via Stabilization of the Ocular Surface. Pharmaceutics 2021; 13:168. [PMID: 33513827 PMCID: PMC7910948 DOI: 10.3390/pharmaceutics13020168] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 01/23/2021] [Accepted: 01/25/2021] [Indexed: 11/16/2022] Open
Abstract
The polymer that includes 2-methacryloyloxy ethyl phosphorylcholine (MPC) is well-known as an effectively hydrating multifunction agent. In this study, we prepared an MPC polymer (MPCP) using radical polymerization with co-monomers-MPC/Stearyl Methacrylate/N,N-dimethylacrylamide-and evaluated the MPCP's usefulness for dry eye treatment using a rabbit model treated with N-acetylcysteine. The MPCP particle size was 50-250 nm, and the form was similar to that of micelles. The MPCP viscosity (approximately 0.95 mPa·s) was 1.17-fold that of purified water, and a decrease in the transepithelial electrical resistance value (corneal damage) was not observed in the immortalized human corneal epithelial cell line HCE-T cell (HCE-T cell layer). The MPCP enhanced the water maintenance on the cornea, and the instillation of MPCP increased the lacrimal fluid volume and prolonged the tear film breakup time without an increase in total mucin contents in the lacrimal fluid of the normal rabbits. The therapeutic potential of the MPCP for dry eye was evaluated using an N-acetylcysteine-treated rabbit model, and, in our investigation, we found that MPCP enhanced the volume of lacrimal fluid and promoted an improvement in the tear film breakup levels. These findings regarding the creation and characteristics of a novel MPCP will provide relevant information for designing further studies to develop a treatment for dry eyes.
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Affiliation(s)
- Noriaki Nagai
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (R.S.); (M.M.); (M.Y.); (S.D.)
| | - Shunsuke Sakurai
- Life Science Products Division, NOF Corporation, Yebisu Garden Place Tower, 20-3 Ebisu 4-chome, Shibuya-ku, Tokyo 150-6019, Japan; (S.S.); (E.H.)
| | - Ryotaro Seiriki
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (R.S.); (M.M.); (M.Y.); (S.D.)
| | - Misa Minami
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (R.S.); (M.M.); (M.Y.); (S.D.)
| | - Mizuki Yamaguchi
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (R.S.); (M.M.); (M.Y.); (S.D.)
| | - Saori Deguchi
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan; (R.S.); (M.M.); (M.Y.); (S.D.)
| | - Eiji Harata
- Life Science Products Division, NOF Corporation, Yebisu Garden Place Tower, 20-3 Ebisu 4-chome, Shibuya-ku, Tokyo 150-6019, Japan; (S.S.); (E.H.)
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