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Lu G, Yang C, Chu K, Zhu Y, Huang S, Zheng J, Jia H, Li X, Ban J. Implantable celecoxib nanofibers made by electrospinning: fabrication and characterization. Nanomedicine (Lond) 2024; 19:657-669. [PMID: 38305028 DOI: 10.2217/nnm-2023-0314] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024] Open
Abstract
Background: Osteoarthritis causes tremendous damage to the joints, reducing the quality of life and imposing significant financial burden. An implantable drug-delivery system can improve the symptomatic manifestations with low doses and frequencies. However, the free drug has short retention in the joint cavity. Materials & methods: This study used electrostatic spinning technology to create an implantable drug-delivery system loaded with celecoxib (celecoxib nanofibers [Cel-NFs]) to improve retention and bioavailability. Results: Cel-NFs exhibited good formability, hydrophilicity and tensile properties. Cel-NFs were able to continuously release drugs for 2 weeks and increase the uptake capacity of Raw 264.7 cells, ultimately ameliorating symptoms in osteoarthritis rats. Conclusion: These results suggest that Cel-NFs can effectively ameliorate cartilage damage, reduce joint pain and alleviate osteoarthritis progression.
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Affiliation(s)
- Geng Lu
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Chuangzan Yang
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Kedi Chu
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Yi Zhu
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Sa Huang
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Juying Zheng
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Huanhuan Jia
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Sysytems, Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Xiaofang Li
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, 510006, China
- Guangdong Laboratory Animals Monitoring Institute, Guangdong Provincial Key Laboratory of Laboratory Animals, Guangzhou, 510663, China
| | - Junfeng Ban
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, 510006, China
- Guangdong Laboratory Animals Monitoring Institute, Guangdong Provincial Key Laboratory of Laboratory Animals, Guangzhou, 510663, China
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Lu G, Li B, Lin L, Li X, Ban J. Mechanical strength affecting the penetration in microneedles and PLGA nanoparticle-assisted drug delivery: Importance of preparation and formulation. Biomed Pharmacother 2024; 173:116339. [PMID: 38428314 DOI: 10.1016/j.biopha.2024.116339] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/19/2024] [Accepted: 02/23/2024] [Indexed: 03/03/2024] Open
Abstract
Microneedles (MNs) prepared from polymeric materials are painless and minimally invasive, safe and efficient, but they hindered by low mechanical strength and single diverse drug release pattern. Due to the distinctive mechanical strength and dimensions of poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs), the integration of nano-technology with microneedles can effectively improve penetration and delivery efficiency through the stratum corneum. We herein designed a simple paroxetine (PAX)-loaded PLGA nanoparticles-integrated dissolving microneedles system (PAX-NPs-DMNs), aiming to improve the bioavailability of PAX through the synergistic permeation-enhancing effect of dissolving microneedles (DMNs) and NPs. PAX-NPs-DMNs had a complete tips molding rate (Neff) of (94.06 ± 2.16) %, a 15×15 quadrangular-conical microneedle array and an overall fracture force of 301.10 N, which were improved nearly 0.50 times compared with the blank microneedles (HA-DMNs) and PAX microneedles (PAX-DMNs). PAX-NPs-DMNs could extend the release duration of PAX from 1 h to 24 h and the cumulative permeability per unit area (Qn) was 47.66 times and 7.37 times higher than the PAX and the PAX-DMNs groups. PAX-NPs-DMNs could be rapidly dissolved within 10 min without hindering skin healing or causing adverse reactions. This study confirmed that PAX-NPs-DMNs can effectively improve the bioavailability of PAX and the mechanical strength of DMNs, which can easily penetrate the skin to provide sustained and painless delivery without causing adverse effects, thus offering a more convenient and effective method for central nervous diseases.
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Affiliation(s)
- Geng Lu
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China; Guangdong Provincial Key Laboratory of Advanced Drug Delivery, Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China; School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Baohua Li
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China; Guangdong Provincial Key Laboratory of Advanced Drug Delivery, Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Luping Lin
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Xiaofang Li
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China; School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Junfeng Ban
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China; Guangdong Provincial Key Laboratory of Advanced Drug Delivery, Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.
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Lin Y, Zhang Y, Cai X, He H, Yang C, Ban J, Guo B. Design and Self-Assembly of Peptide-Copolymer Conjugates into Nanoparticle Hydrogel for Wound Healing in Diabetes. Int J Nanomedicine 2024; 19:2487-2506. [PMID: 38486937 PMCID: PMC10938256 DOI: 10.2147/ijn.s452915] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Accepted: 02/25/2024] [Indexed: 03/17/2024] Open
Abstract
Background Delayed wound healing in skin injuries has become a significant problem in clinics, seriously affecting and even threatening life and health. Recently, research interest has increased in developing wound dressings containing bioactive compounds capable of improving outcomes for complex healing needs. Methods In this study, Puerarin-loaded nanoparticles (Pue-NPs) were prepared using the cell-penetrating peptide-poly (lactic-co-glycolic acid) (CPP-PLGA) as a drug carrier by the emulsified solvent evaporation method. Then, they were added into poly (acrylic acid) to obtain a self-assembled nanocomposite hydrogels (SANHs) drug delivery system using the co-polymerization method. The particle size, zeta potential, and micromorphology of Pue-NPs were measured; the appearance, mechanical properties, adhesive strength, and biological activity of SANHs were performed. Finally, the potential of SANHs for wound healing was further evaluated in streptozotocin-induced diabetic mice. Results Pue-NPs were regularly spherical, with an average particle size of 134.57 ± 1.42 nm and a zeta potential of 2.14 ± 0.78 mV. SANHs was colorless and transparent with a honeycomb-like porous structure and had an excellent swelling ratio (917%), water vapor transmission rate (3077 g·m-2·day-1), mechanical properties (Young's modulus of 18 kPa, elongation at break of 307%), and adhesive strength (15.5 kPa). SANHs exhibited sustained release of Pue over 48h, with a cumulative release of 55.60 ± 6.01%. In vitro tests revealed that the SANHs presented a 92.22% antibacterial rate against Escherichia coli after 4h, and a 61.91% scavenging rate of 1.1-diphenyl-2-trinitrophenylhydrazine (DPPH) radical. In vivo experiments showed that SANHs accelerated wound repair by reducing the inflammatory response at the wound site, promoting angiogenesis, and facilitating epidermal regeneration and collagen deposition. Conclusion In conclusion, we successfully prepared SANHs. Our results show that SANHs have excellent performance and improves wound healing in diabetic mice model, indicating that it can be used to develop an effective strategy for the treatment of diabetic wounds.
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Affiliation(s)
- Yiling Lin
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Yingneng Zhang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Xia Cai
- Guangdong Institute for Drug Control, Guangzhou, People’s Republic of China
| | - Huashen He
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Chuangzan Yang
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Junfeng Ban
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery, Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Bohong Guo
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
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Qin Z, Li B, Deng Q, Wen Y, Feng S, Duan C, Zhao B, Li H, Gao Y, Ban J. Polymer Nanoparticles with 2-HP-β-Cyclodextrin for Enhanced Retention of Uptake into HCE-T Cells. Molecules 2024; 29:658. [PMID: 38338402 PMCID: PMC10856407 DOI: 10.3390/molecules29030658] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/12/2024] [Accepted: 01/18/2024] [Indexed: 02/12/2024] Open
Abstract
Triamcinolone acetonide (TA), a medium-potency synthetic glucocorticoid, is primarily employed to treat posterior ocular diseases using vitreous injection. This study aimed to design novel ocular nanoformulation drug delivery systems using PLGA carriers to overcome the ocular drug delivery barrier and facilitate effective delivery into the ocular tissues after topical administration. The surface of the PLGA nanodelivery system was made hydrophilic (2-HP-β-CD) through an emulsified solvent volatilization method, followed by system characterization. The mechanism of cellular uptake across the corneal epithelial cell barrier used rhodamine B (Rh-B) to prepare fluorescent probes for delivery systems. The triamcinolone acetonide (TA)-loaded nanodelivery system was validated by in vitro release behavior, isolated corneal permeability, and in vivo atrial hydrodynamics. The results indicated that the fluorescent probes, viz., the Rh-B-(2-HP-β-CD)/PLGA NPs and the drug-loaded TA-(2-HP-β-CD)/PLGA NPs, were within 200 nm in size. Moreover, the system was homogeneous and stable. The in vitro transport mechanism across the epithelial barrier showed that the uptake of nanoparticles was time-dependent and that NPs were actively transported across the epithelial barrier. The in vitro release behavior of the TA-loaded nanodelivery systems revealed that (2-HP-β-CD)/PLGA nanoparticles could prolong the drug release time to up to three times longer than the suspensions. The isolated corneal permeability demonstrated that TA-(2-HP-β-CD)/PLGA NPs could extend the precorneal retention time and boost corneal permeability. Thus, they increased the cumulative release per unit area 7.99-fold at 8 h compared to the suspension. The pharmacokinetics within the aqueous humor showed that (2-HP-β-CD)/PLGA nanoparticles could elevate the bioavailability of the drug, and its Cmax was 51.91 times higher than that of the triamcinolone acetonide aqueous solution. Therefore, (2-HP-β-CD)/PLGA NPs can potentially elevate transmembrane uptake, promote corneal permeability, and improve the bioavailability of drugs inside the aqueous humor. This study provides a foundation for future research on transocular barrier nanoformulations for non-invasive drug delivery.
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Affiliation(s)
- Zhenmiao Qin
- Hainan Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China; (Z.Q.); (S.F.); (C.D.); (B.Z.); (H.L.)
| | - Baohua Li
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou 510006, China; (B.L.); (Q.D.); (Y.W.)
| | - Qiyi Deng
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou 510006, China; (B.L.); (Q.D.); (Y.W.)
| | - Yifeng Wen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou 510006, China; (B.L.); (Q.D.); (Y.W.)
| | - Shiquan Feng
- Hainan Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China; (Z.Q.); (S.F.); (C.D.); (B.Z.); (H.L.)
| | - Chengcheng Duan
- Hainan Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China; (Z.Q.); (S.F.); (C.D.); (B.Z.); (H.L.)
| | - Beicheng Zhao
- Hainan Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China; (Z.Q.); (S.F.); (C.D.); (B.Z.); (H.L.)
| | - Hailong Li
- Hainan Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China; (Z.Q.); (S.F.); (C.D.); (B.Z.); (H.L.)
| | - Yanan Gao
- Hainan Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China; (Z.Q.); (S.F.); (C.D.); (B.Z.); (H.L.)
| | - Junfeng Ban
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou 510006, China; (B.L.); (Q.D.); (Y.W.)
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Li B, Lu G, Liu W, Liao L, Ban J, Lu Z. Formulation and Evaluation of PLGA Nanoparticulate-Based Microneedle System for Potential Treatment of Neurological Diseases. Int J Nanomedicine 2023; 18:3745-3760. [PMID: 37457799 PMCID: PMC10348379 DOI: 10.2147/ijn.s415728] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 06/22/2023] [Indexed: 07/18/2023] Open
Abstract
Introduction The tight structure of the blood-brain barrier severely limits the level of drug therapy for central nervous system disorders. In this study, a novel composite delivery system combining nanocarrier and microneedle technology was prepared to explore the possibility of transdermal delivery of drugs to work in the brain. Methods Nanoparticle solutions containing paroxetine and rhodamine-B were prepared using PLGA as a carrier by the emulsification-solvent volatilization method. Then, they were mixed with hyaluronic acid and the PLGA nanoparticulate-based microneedle system (Rh-NPs-DMNs) was prepared by a multi-step decompression-free diffusion method. The particle size, zeta potential, and micromorphology of the nano solution were measured; the appearance, mechanical strength, dissolution properties, and puncture effect of the Rh-NPs-DMNs were evaluated; also, it was evaluated for in vivo live imaging properties and in vitro skin layer transport and distribution properties. Results The mean particle size of Rh-NPs was 96.25 ± 2.26 nm; zeta potential of 15.89 ± 1.97 mV; PDI of 0.120 ± 0.079. Rh-NPs-DMNs had a high needle content of 96.11 ± 1.27% and a tip height of 651.23 ± 1.28 μm, with excellent mechanical properties (fracture force of 299.78 ± 1.74 N). H&E skin tissue staining showed that Rh-NPs-DMNs produced micron-sized mechanical pores approximately 550 μm deep immediately after drug administration, allowing for efficient circulation of the drug; and the results of in vivo imaging showed that Rh-B NPs DMNs had a faster transport rate than Rh-B DMNs, with strong fluorescent signals in both brain (P<0.01) and hippocampus (P<0.05) 48 h after drug administration. Conclusion Nanoparticles can prolong blood circulation time and intracerebral retention time and have certain brain-targeting properties due to their excellent physical properties. The use of microneedle technology combined with nanocarriers provides new ideas for delivery systems for the treatment of central neurological diseases.
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Affiliation(s)
- Baohua Li
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery, Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Geng Lu
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery, Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Wenbin Liu
- Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Liqi Liao
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Junfeng Ban
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery, Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Zhufen Lu
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery, Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
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Chu K, Zhu Y, Lu G, Huang S, Yang C, Zheng J, Chen J, Ban J, Jia H, Lu Z. Formation of Hydrophilic Nanofibers from Nanostructural Design in the Co-Encapsulation of Celecoxib through Electrospinning. Pharmaceutics 2023; 15:pharmaceutics15030730. [PMID: 36986590 PMCID: PMC10051909 DOI: 10.3390/pharmaceutics15030730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/09/2023] [Accepted: 02/17/2023] [Indexed: 02/24/2023] Open
Abstract
This study presents a method for a one-step co-encapsulation of PLGA nanoparticles in hydrophilic nanofibers. The aim is to effectively deliver the drug to the lesion site and achieve a longer release time. The celecoxib nanofiber membrane (Cel-NPs-NFs) was prepared by emulsion solvent evaporation and electrospinning with celecoxib as a model drug. By this method, nanodroplets of celecoxib PLGA are entrapped within polymer nanofibers during an electrospinning process. Moreover, Cel-NPs-NFs exhibited good mechanical strength and hydrophilicity, with a cumulative release of 67.74% for seven days, and the cell uptake at 0.5 h was 2.7 times higher than that of pure nanoparticles. Furthermore, pathological sections of the joint exhibited an apparent therapeutic effect on rat OA, and the drug was delivered effectively. According to the results, this solid matrix containing nanodroplets or nanoparticles could use hydrophilic materials as carriers to prolong drug release time.
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Affiliation(s)
- Kedi Chu
- Center for New Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yi Zhu
- Center for New Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Geng Lu
- Center for New Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Sa Huang
- Guangdong Laboratory Animals Monitoring Institute, Guangdong Provincial Key Laboratory of Laboratory Animals, Guangzhou 510663, China
| | - Chuangzan Yang
- Center for New Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Juying Zheng
- Center for New Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Junming Chen
- Center for New Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Junfeng Ban
- Center for New Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou 510006, China
- Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Huanhuan Jia
- Guangdong Laboratory Animals Monitoring Institute, Guangdong Provincial Key Laboratory of Laboratory Animals, Guangzhou 510663, China
- Correspondence: (H.J.); (Z.L.)
| | - Zhufen Lu
- Center for New Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou 510006, China
- Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
- Correspondence: (H.J.); (Z.L.)
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Lai Y, Feng M, Deng J, Tan B, Ban J, Zheng J. Medication analysis and pharmaceutical care for a child with Kawasaki disease: A case report and review of the literature. Medicine (Baltimore) 2023; 102:e32488. [PMID: 36607867 PMCID: PMC9829272 DOI: 10.1097/md.0000000000032488] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
OBJECTIVE To explore the ideas and methods of clinical pharmacists regarding drug therapy for children with Kawasaki disease. METHODS By participating in a whole drug treatment process for a child with Kawasaki disease, the rationality of the drug treatment plan was analyzed, pharmaceutical care was provided for the child, and a pharmaceutical care model suited to this child was developed. RESULTS After treatment, the child was discharged from the hospital, and all signs and major inflammatory indicators returned to normal. The child's parents were instructed to bring medication, visit regularly, and adjust medication. CONCLUSION Through the entire process of pharmaceutical care, clinical pharmacists are able to identify and resolve drug treatment-related issues in a timely manner, and also make suggestions on rational drug use, which can improve the safety and compliance of drug use in children and the quality of clinical drug treatment.
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Affiliation(s)
- Yingqiang Lai
- Department of Pharmacy, Yuebei People’s Hospital, Shaoguan, Guangdong, People’s Republic of China
- * Correspondence: Yingqiang Lai, MD, Department of Pharmacy, Yuebei People’s Hospital, Shaoguan, Guangzhou 512023, People’s Republic of China (e-mail: )
| | - Meirou Feng
- Department of Pharmacy, Yuebei People’s Hospital, Shaoguan, Guangdong, People’s Republic of China
| | - Jianrong Deng
- Department of Pediatric, Yuebei People’s Hospital, Shaoguan, Guangdong, People’s Republic of China
| | - Benren Tan
- Department of Pharmacy, Yuebei People’s Hospital, Shaoguan, Guangdong, People’s Republic of China
- Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Junfeng Ban
- Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Jinkun Zheng
- Department of Pharmacy, Yuebei People’s Hospital, Shaoguan, Guangdong, People’s Republic of China
- Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
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Schlegel RN, Fitzgerald M, O'Reilly G, Clements W, Goh GS, Groombridge C, Johnny C, Noonan M, Ban J, Mathew J. The injury patterns, management and outcomes of retroperitoneal haemorrhage caused by lumbar arterial bleeding at a Level-1 Trauma Centre: A 10-year retrospective review. Injury 2023; 54:145-149. [PMID: 35948513 DOI: 10.1016/j.injury.2022.07.041] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 07/13/2022] [Accepted: 07/26/2022] [Indexed: 02/02/2023]
Abstract
PURPOSE Haemorrhagic shock remains a leading preventable cause of death amongst trauma patients. Failure to identify retroperitoneal haemorrhage (RPH) can lead to irreversible haemorrhagic shock. The arteries of the middle retroperitoneal region (i.e., the 1st to 4th lumbar arteries) are complicit in haemorrhage into the retroperitoneal space. However, predictive injury patterns and subsequent management implications of haemorrhage secondary to bleeding of these arteries is lacking. MATERIALS AND METHODS We performed a retrospective cohort study of patients diagnosed with retroperitoneal haemorrhage who presented to our Level-1 Trauma Centre (2009-2019). We described the associated injuries, management and outcomes relating to haemorrhage of lumbar arteries (L1-4) from this cohort to assess risk and management priorities in non-cavitary haemorrhage compared to RPH due to other causes. RESULTS Haemorrhage of the lumbar arteries (LA) is associated with a higher proportion of lumbar transverse process (TP) fractures. Bleeding from branches of these vessels is associated with lower systolic blood pressure, increased incidence of massive transfusion, higher shock index, and a higher Injury Severity Score (ISS). A higher proportion of patients in the LA group underwent angioembolisation when compared to other causes of RPH. CONCLUSION This study highlights the injury patterns, particularly TP fractures, in the prediction, early detection and management of haemorrhage from the lumbar arteries (L1-4). Compared to other causes of RPH, bleeding of the LA responds to early, aggressive haemorrhage control through angioembolisation. These injuries are likely best treated in Level-1 or Level-2 trauma facilities that are equipped with angioembolisation facilities or hybrid theatres to facilitate early identification and management of thoracolumbar bleeds.
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Affiliation(s)
- R N Schlegel
- Trauma Service, The Alfred Hospital, Melbourne, VIC, Australia; Emergency and Trauma Centre, The Alfred Hospital, Melbourne, VIC, Australia.
| | - M Fitzgerald
- Trauma Service, The Alfred Hospital, Melbourne, VIC, Australia; National Trauma Research Institute (NTRI), Melbourne, VIC, Australia
| | - G O'Reilly
- Trauma Service, The Alfred Hospital, Melbourne, VIC, Australia; National Trauma Research Institute (NTRI), Melbourne, VIC, Australia; Emergency and Trauma Centre, The Alfred Hospital, Melbourne, VIC, Australia
| | - W Clements
- National Trauma Research Institute (NTRI), Melbourne, VIC, Australia; Department of Radiology, The Alfred Hospital, Melbourne, VIC, Australia; Department of Surgery, Monash University Central Clinical School, Australia
| | - G S Goh
- National Trauma Research Institute (NTRI), Melbourne, VIC, Australia; Department of Radiology, The Alfred Hospital, Melbourne, VIC, Australia; Department of Surgery, Monash University Central Clinical School, Australia
| | - C Groombridge
- Trauma Service, The Alfred Hospital, Melbourne, VIC, Australia; National Trauma Research Institute (NTRI), Melbourne, VIC, Australia; Emergency and Trauma Centre, The Alfred Hospital, Melbourne, VIC, Australia
| | - C Johnny
- Trauma Service, The Alfred Hospital, Melbourne, VIC, Australia; National Trauma Research Institute (NTRI), Melbourne, VIC, Australia; Emergency and Trauma Centre, The Alfred Hospital, Melbourne, VIC, Australia
| | - M Noonan
- Trauma Service, The Alfred Hospital, Melbourne, VIC, Australia; National Trauma Research Institute (NTRI), Melbourne, VIC, Australia; Emergency and Trauma Centre, The Alfred Hospital, Melbourne, VIC, Australia
| | - J Ban
- Trauma Service, The Alfred Hospital, Melbourne, VIC, Australia
| | - J Mathew
- Trauma Service, The Alfred Hospital, Melbourne, VIC, Australia; National Trauma Research Institute (NTRI), Melbourne, VIC, Australia; Emergency and Trauma Centre, The Alfred Hospital, Melbourne, VIC, Australia
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9
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Ma P, Huang J, Liu J, Zhu Y, Chen J, Chen J, Lei L, Guan Z, Ban J, Lu Z. Nanoformulation of Paclitaxel: Exploring the Cyclodextrin / PLGA Nano Delivery Carrier to Slow Down Paclitaxel Release, Enhance Accumulation in Vivo. J Cancer 2023; 14:759-769. [PMID: 37056390 PMCID: PMC10088884 DOI: 10.7150/jca.82410] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 03/03/2023] [Indexed: 04/15/2023] Open
Abstract
Background: Improving the aggregation and penetration in tumor sites increases the anti-tumor efficacy of nanomedicine. In the current study, we designed cyclodextrin modified PLGA nanoparticles loaded with paclitaxel to elevate the accumulation and prolong circulation of chemotherapy drugs in vivo. Methods: The PLGA nanoparticles loaded with paclitaxel (PTX PLGA NPs) and cyclodextrin (CD) modified PLGA nanoparticles loaded with paclitaxel (PTX PLGA/CD NPs) were prepared using the emulsification solvent evaporation method. The nanoparticles were characterized by particle size, zeta potential, encapsulation efficiency, infrared spectroscopy analysis and X-Ray diffraction (XRD). Then, drug release of the nanoparticles was evaluated via reverse dialysis method in vitro. Finally, the in vivo distribution fate and pharmacokinetic characteristics of the nanoparticles were assessed in mice and rats. Results: The average particle size, zeta potential, and encapsulation efficiency of PTX PLGA NPs were (163.57±2.07) nm, - (20.53±2.79) mV and (60.44±6.80)%. The average particle size, zeta potential, and encapsulation efficiency of PTX PLGA/CD NPs were (148.57±1.66) nm, - (11.42±0.84) mV and (85.70±2.06)%. In vitro release studies showed that PTX PLGA/CD NPs were released more slowly compared to PTX PLGA NPs under normal blood pH conditions, while PTX PLGA/CD NPs were released more completely under tumor site pH conditions. The modified PLGA nanocarrier (PLGA/CD NPs) increased drug residence time and accumulation than the plain PLGA nanocarrier (PLGA NPs) in vivo distribution. In addition, the elimination half-life, area under the drug-time curve, and maximum blood concentration of the nanoparticle group were higher than those of Taxol®, especially the PTX PLGA/CD NPs group, which was significantly different from Taxol® and plain nanoparticle groups (p<0.001). Conclusions: The 2-HP-β-CD modified PLGA nanoparticles prolonged circulation time and accumulation of the chemotherapy drug paclitaxel in vivo.
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Affiliation(s)
- Peilin Ma
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - JiaYing Huang
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Jinling Liu
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yi Zhu
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Jiahong Chen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Junming Chen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Lunwen Lei
- The Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou, People's Republic of China
| | - Ziyun Guan
- The Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou, People's Republic of China
| | - Junfeng Ban
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
- Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
- ✉ Corresponding authors: Dr. Ban Junfeng.
| | - Zhufen Lu
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
- The Innovation Team for Integrating Pharmacy with Entrepreneurship, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
- ✉ Corresponding authors: Dr. Ban Junfeng.
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10
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Zheng K, Huang Z, Huang J, Liu X, Ban J, Huang X, Luo H, Chen Z, Xie Q, Chen Y, Lu Z. Effect of a 2-HP-β-Cyclodextrin Formulation on the Biological Transport and Delivery of Chemotherapeutic PLGA Nanoparticles. Drug Des Devel Ther 2021; 15:2605-2618. [PMID: 34168432 PMCID: PMC8216700 DOI: 10.2147/dddt.s314361] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 06/04/2021] [Indexed: 11/23/2022] Open
Abstract
Background The aim of this work was to develop a novel and feasible modification strategy by utilizing the supramolecular effect of 2-hydroxypropyl-beta-cyclodextrin (2-HP-β-CD) for enhancing the biological transport efficiency of paclitaxel (PTX)-loaded poly(lactide-co-glycolide) (PLGA) nanoparticles. Methods PTX-loaded 2-HP-β-CD-modified PLGA nanoparticles (2-HP-β-CD/PLGA NPs) were prepared using the modified emulsion method. Nano-characteristics, drug release behavior, in vitro cytotoxicity, cellular uptake profiles and in vivo bio-behavior of the nanoparticles were then characterized. Results Compared with the plain PLGA NPs, 2-HP-β-CD/PLGA NPs exhibited smaller particle sizes (151.03±1.36 nm), increased entrapment efficiency (~49.12% increase) and sustained drug release. When added to A549 human lung cancer cells, compared with PLGA NPs, 2-HP-β-CD/PLGA NPs exhibited higher cytotoxicity in MTT assays and improved cellular uptake efficiency. Pharmacokinetic analysis showed that the AUC value of 2-HP-β-CD/PLGA NPs was 2.4-fold higher than commercial Taxol® and 1.7-fold higher than plain PLGA NPs. In biodistribution assays, 2-HP-β-CD/PLGA NPs exhibited excellent stability in the circulation. Conclusion The results of this study suggest that the formulation that contains 2-HP-β-CD can prolong PTX release, enhance drug transport efficiency and serve as a potential tumor targeting system for PTX.
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Affiliation(s)
- Kangyu Zheng
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zeju Huang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Jiaying Huang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Xiangmei Liu
- Guangzhou Quality Supervision and Testing Institute, Guangzhou, People's Republic of China
| | - Junfeng Ban
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Xin Huang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Haosen Luo
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhicong Chen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Qingchun Xie
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yanzhong Chen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhufen Lu
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
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11
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Chen P, Luo H, Huang S, Liu J, Lin M, Yang F, Ban J, Huang Z, Lu Z, Xie Q, Chen Y. Preparation of High-Drug-Loaded Clarithromycin Gastric-Floating Sustained-Release Tablets Using 3D Printing. AAPS PharmSciTech 2021; 22:131. [PMID: 33839973 DOI: 10.1208/s12249-021-01994-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 03/15/2021] [Indexed: 11/30/2022] Open
Abstract
The high-drug-loaded sustained-release gastric-floating clarithromycin (CAM) tablets were proposed and manufactured via semisolid extrusion (SSE)-based 3D printing. The physical and mechanical properties, such as dimensions, weight variation, friability, and hardness, were accessed according to the quality standards of Chinese Pharmacopoeia (Ch.P). The interactions among the drug-excipients were evaluated via differential scanning calorimetry (DSC), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) techniques. Next, the rheological properties of the paste and the effect of the excipients and solvents were evaluated. Finally, a very high drug-loading of up to 81.7% (w/w) with the sustain release time of 8 h (125 mg) and 12 h (250 mg) was achieved. The results revealed the potential of SSE for achieving a high drug loading and identified the suitable properties of the paste for SSE-based 3D printing.
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12
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Jiang G, Jia H, Qiu J, Mo Z, Wen Y, Zhang Y, Wen Y, Xie Q, Ban J, Lu Z, Chen Y, Wu H, Ni Q, Chen F, Lu J, Wang Z, Li H, Chen J. PLGA Nanoparticle Platform for Trans-Ocular Barrier to Enhance Drug Delivery: A Comparative Study Based on the Application of Oligosaccharides in the Outer Membrane of Carriers. Int J Nanomedicine 2020; 15:9373-9387. [PMID: 33262593 PMCID: PMC7699454 DOI: 10.2147/ijn.s272750] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 09/24/2020] [Indexed: 12/31/2022] Open
Abstract
Purpose The trans-ocular barrier is a key factor limiting the therapeutic efficacy of triamcinolone acetonide. We developed a poly(lactic-co-glycolic acid) nanoparticles (PLGA NPs) surface modified respectively with 2-hydroxypropyl-β-cyclodextrin (2-HP-β-CD), chitosan oligosaccharide and trehalose. Determination of the drug/nanoparticles interactions, characterization of the nanoparticles, in vivo ocular compatibility tests, comparisons of their corneal permeability and their pharmacokinetics in aqueous humor were carried out. Methods All PLGA NPs were prepared by the single emulsion and evaporation method and the drug-nanoparticle interaction was studied. The physiochemical features and in vitro corneal permeability of NPs were characterized while the aqueous humor pharmacokinetics was performed to evaluate in vivo corneal permeability of NPs. Ocular compatibility of NPs was investigated through Draize and histopathological test. Results The PLGA NPs with lactide/glycolide ratio of 50:50 and small particle size (molecular weight 10 kDa) achieved optimal drug release and corneal permeability. Surface modification with different oligosaccharides resulted in uniform particle sizes and similar drug-nanoparticle interactions, although 2-HP-β-CD/PLGA NPs showed the highest entrapment efficiency. In vitro evaluation and aqueous humor pharmacokinetics further revealed that 2-HP-β-CD/PLGA NPs had greater trans-ocular permeation and retention compared to chitosan oligosaccharide/PLGA and trehalose/PLGA NPs. No ocular irritation in vivo was detected after applying modified/unmodified PLGA NPs to rabbit's eyes. Conclusion 2-HP-β-CD/PLGA NPs are a promising nanoplatform for localized ocular drug delivery through topical administration.
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Affiliation(s)
- Ge Jiang
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Huanhuan Jia
- Key Laboratory of Guangdong Laboratory Animals, Guangdong Laboratory Animals Monitoring Institute, Guangzhou, People's Republic of China
| | - Jindi Qiu
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhenjie Mo
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yifeng Wen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yan Zhang
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yuqin Wen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Qingchun Xie
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Innovation Team for Controlled-Release Microparticle Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Junfeng Ban
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Innovation Team for Controlled-Release Microparticle Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhufen Lu
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Innovation Team for Controlled-Release Microparticle Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yanzhong Chen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precision Drug Delivery System, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Innovation Team for Controlled-Release Microparticle Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Hao Wu
- Community Health Service Center of South China Agricultural University, Guangzhou, People's Republic of China
| | - Qingchun Ni
- Guangzhou General Pharmaceutical Research Institute Co., Ltd, Guangzhou, People's Republic of China
| | - Fohua Chen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Jiashu Lu
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhijiong Wang
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Haoting Li
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Junming Chen
- Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
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13
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Chen S, Jia H, Cui X, Zhang Y, Wen Y, Ding Y, Xie Q, Lin Y, Xiao F, Lin X, Wu H, Mo Z, Zheng K, Qiu J, Wen Y, Ni Q, Ban J, Chen Y, Lu Z. Characterization of stimuli-responsive and cross-linked nanohydrogels for applications in ophthalmiatrics therapy. Appl Nanosci 2020. [DOI: 10.1007/s13204-020-01450-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Li F, Wen Y, Zhang Y, Zheng K, Ban J, Xie Q, Wen Y, Liu Q, Chen F, Mo Z, Liu L, Chen Y, Lu Z. Characterisation of 2-HP-β-cyclodextrin-PLGA nanoparticle complexes for potential use as ocular drug delivery vehicles. Artif Cells Nanomed Biotechnol 2020; 47:4097-4108. [PMID: 31663388 DOI: 10.1080/21691401.2019.1683567] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Aim: 2-HP-β-cyclodextrin-PLGA nanoparticle complexes were prepared to enhance the aqueous humour delivery of Triamcinolone acetonide.Materials & methods: Drug-loaded 2-HP-β-CD/PLGA nanoparticle complexes prepared by adapting a quasi-emulsion solvent evaporation technique. In vitro drug release, in vitro transcorneal permeation study, histopathological study and in vivo transcorneal penetration of PLGA nanoparticles and 2-HP-β-CD/PLGA nanoparticle complexes were evaluated. Results: Particle size distributions of 2-HP-β-CD/PLGA nanoparticle complexes were 149.4 ± 3.7 nm and presented stable system. Corneal penetration studies revealed steady sustained drug release (First-order); 2-HP-β-CD/PLGA nanoparticle complexes increased ocular bioavailability by increasing dispersion in the tear film and improving drug release. Conclusion: 2-HP-β-CD/PLGA nanoparticle complex formulation is a promising alternative to conventional eye drops.
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Affiliation(s)
- Fan Li
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yuqin Wen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yan Zhang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Kangyu Zheng
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Junfeng Ban
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Qingchun Xie
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yifeng Wen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Qing Liu
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Fohua Chen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhenjie Mo
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Lizhong Liu
- Department of Hospital Pharmacy, Ningbo 7 Hospital, Ningbo, People's Republic of China
| | - Yanzhong Chen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhufen Lu
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
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Trajanovska S, Ban J, Huang J, Gregorevic P, Morsch M, Allen DG, Phillips WD. Muscle specific kinase protects dystrophic mdx mouse muscles from eccentric contraction-induced loss of force-producing capacity. J Physiol 2019; 597:4831-4850. [PMID: 31340406 DOI: 10.1113/jp277839] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 07/17/2019] [Indexed: 12/19/2022] Open
Abstract
KEY POINTS Adeno-associated viral vector was used to elevate the expression of muscle specific kinase (MuSK) and rapsyn (a cytoplasmic MuSK effector protein) in the tibialis anterior muscle of wild-type and dystrophic (mdx) mice. In mdx mice, enhanced expression of either MuSK or rapsyn ameliorated the acute loss of muscle force associated with strain injury. Increases in sarcolemmal immunolabelling for utrophin and β-dystroglycan suggest a mechanism for the protective effect of MuSK in mdx muscles. MuSK also caused subtle changes to the structure and function of the neuromuscular junction, suggesting novel roles for MuSK in muscle physiology and pathophysiology. ABSTRACT Muscle specific kinase (MuSK) has a well-defined role in stabilizing the developing mammalian neuromuscular junction, but MuSK might also be protective in some neuromuscular diseases. In the dystrophin-deficient mdx mouse model of Duchenne muscular dystrophy, limb muscles are especially fragile. We injected the tibialis anterior muscle of 8-week-old mdx and wild-type (C57BL10) mice with adeno-associated viral vectors encoding either MuSK or rapsyn (a cytoplasmic MuSK effector protein) fused to green fluorescent protein (MuSK-GFP and rapsyn-GFP, respectively). Contralateral muscles injected with empty vector served as controls. One month later mice were anaesthetized with isoflurane and isometric force-producing capacity was recorded from the distal tendon. MuSK-GFP caused an unexpected decay in nerve-evoked tetanic force, both in wild-type and mdx muscles, without affecting contraction elicited by direct electrical stimulation of the muscle. Muscle fragility was probed by challenging muscles with a strain injury protocol consisting of a series of four strain-producing eccentric contractions in vivo. When applied to muscles of mdx mice, eccentric contraction produced an acute 27% reduction in directly evoked muscle force output, affirming the susceptibility of mdx muscles to strain injury. mdx muscles overexpressing MuSK-GFP or rapsyn-GFP exhibited significantly milder force deficits after the eccentric contraction challenge (15% and 14%, respectively). The protective effect of MuSK-GFP in muscles of mdx mice was associated with increased immunolabelling for utrophin and β-dystroglycan in the sarcolemma. Elevating the expression of MuSK or rapsyn revealed several distinct synaptic and extrasynaptic effects, suggesting novel roles for MuSK signalling in muscle physiology and pathophysiology.
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Affiliation(s)
- S Trajanovska
- Physiology and Bosch Institute, University of Sydney, Sydney, New South Wales, Australia
| | - J Ban
- Physiology and Bosch Institute, University of Sydney, Sydney, New South Wales, Australia
| | - J Huang
- Physiology and Bosch Institute, University of Sydney, Sydney, New South Wales, Australia
| | - P Gregorevic
- Department of Physiology, The University of Melbourne, Melbourne, Victoria, Australia.,Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Victoria, Australia.,Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA
| | - M Morsch
- Department of Biomedical Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - D G Allen
- Physiology and Bosch Institute, University of Sydney, Sydney, New South Wales, Australia
| | - W D Phillips
- Physiology and Bosch Institute, University of Sydney, Sydney, New South Wales, Australia
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16
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Abstract
Background Triamcinolone acetonide (TAA) is an effective and the most commonly used corticosteroid hormone for the treatment of hypertrophic scars (HSs). However, the clinically used dosage has poor tissue permeability and injection safety. By contrast, lipid nanoparticles (LNPs) have the advantage of high affinity for the skin. Materials and methods This article describes the preparation of TAA-LNPs using poly(lactic-co-glycolic acid) as a carrier material, which have good biocompatibility and biodegradability. Based on a systematic investigation of its physicochemical properties, a rabbit ear HSs model was established to evaluate the percutaneous permeability of TAA-LNPs in scar tissue in vitro as well as to assess its curative effect and skin irritation. Results The results showed that the TAA-LNPs formed uniform and round particles under fluoroscopy and had a complex structure in which a nanoparticle core was surrounded by multiple vesicles. The particles were 232.2±8.2 nm in size, and the complimentary potential was -42.16 mV. The encapsulation efficiency was 85.24%, which is greater than that of other common liposomes and nanoparticles. A test of in vitro scar tissue permeability showed that penetration into scar tissue was twofold and 40-fold higher for TAA-LNPs than for common liposome and commercial suspensions, respectively. The concentration of the absorbed drug effectively inhibited fibroblast proliferation, achieved a therapeutic effect in HSs, and did not stimulate intact or damaged skin. Conclusion The preparation of TAA into LNPs for transdermal administration can enhance transdermal permeation performance and the safety of this drug, which is beneficial for the treatment of HSs.
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Affiliation(s)
- Zhenmiao Qin
- School of Pharmacy, Hainan Medical University, Haikou, People's Republic of China,
| | - Feng Chen
- School of Pharmacy, Hainan Medical University, Haikou, People's Republic of China, .,Hainan Provincial Key Laboratory of R&D of Tropical Herbs, Hainan Medical University, Haikou, People's Republic of China,
| | - Demei Chen
- School of Pharmacy, Hainan Medical University, Haikou, People's Republic of China,
| | - Yong Wang
- School of Pharmacy, Hainan Medical University, Haikou, People's Republic of China, .,Hainan Provincial Key Laboratory of R&D of Tropical Herbs, Hainan Medical University, Haikou, People's Republic of China,
| | - Yinfeng Tan
- School of Pharmacy, Hainan Medical University, Haikou, People's Republic of China, .,Hainan Provincial Key Laboratory of R&D of Tropical Herbs, Hainan Medical University, Haikou, People's Republic of China,
| | - Junfeng Ban
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China,
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17
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Chen C, Sun ZY, Sun QH, Ban J, Li TT. [The impact of persistent high ambient fine particulate matters exposures on mortality in the 40 districts/counties of China, 2013-2015]. Zhonghua Yu Fang Yi Xue Za Zhi 2019; 53:76-80. [PMID: 30605966 DOI: 10.3760/cma.j.issn.0253-9624.2019.01.010] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the impact of persistent high ambient fine particulate matters (PM(2.5)) exposures on mortality in the polluted areas of 40 districts/counties in China. Methods: Using a convenient sampling method, we selected 40 districts/counties as research sites from the Beijing-Tianjin-Hebei Metropolitan Region, the Yangtze River Delta, the Pearl River Delta, and Heilongjiang, Shanxi, and Sichuan province. The daily concentrations of PM(2.5), meteorological data and population death data from January 1, 2013 to December 31, 2015 were collected. The six persistent PM(2).5 pollution episode scenarios were defined by the average daily concentration of PM(2.5) (75 μg/m(3), P(75) and P(90) of the average daily concentration of each district/county respectively) and the duration (≥2 days or 3 days). Generalized linear models and meta analyses were used to explore the impact of PM(2.5) pollution episodes on mortality in 40 districts/counties. Results: The mean±SD and P(50) (P(25), P(75)) of average daily temperature, relative humidity and PM(2.5) were (15.26±10.48) ℃, 17.20 (7.50, 23.70) ℃, (67.31±19.26)%, 72.00% (57.00%, 81.00%), (72.81±60.93) μg/m(3) and 55.38 (33.77, 91.45) μg/m(3), respectively in 40 districts/counties during 2013-2015. The average number of non-accidental, cardiovascular and cerebrovascular diseases deaths per day were (12±7), (5±4) and (2±2) in each district/county, respectively. When the daily concentrations of PM(2.5) were ≥75 μg/m(3) (≥2 days), ≥P(75) (≥2 days), ≥P(90) (≥2 days), ≥75 μg/m(3) (≥3 days), and ≥P(75) (≥3 days), the excess risk (95%CI) of the total non-accidental deaths and cardiovascular diseases deaths were 1.77% (0.89%,2.66%), 2.69% (1.06%,4.35%), 1.67% (0.59%,2.76%), 2.31% (0.67%, 3.97%), 0.71% (-0.75%, 2.20%), 1.95% (0.08%, 3.86%), 1.15% (0.12%, 2.18%), 1.85% (0.25%, 3.47%), 1.39% (0.15%, 2.64%), 2.29% (0.39%, 4.23%), respectively. Conclusion: Persistently high PM(2.5) exposures were associated with total non-accidental deaths and cardiovascular disease deaths.
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Affiliation(s)
- C Chen
- Department of Environment and Health Risk Assessment, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
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18
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Mo Z, Ban J, Zhang Y, Du Y, Wen Y, Huang X, Xie Q, Shen L, Zhang S, Deng H, Hou D, Chen Y, Lu Z. Nanostructured lipid carriers-based thermosensitive eye drops for enhanced, sustained delivery of dexamethasone. Nanomedicine (Lond) 2018; 13:1239-1253. [PMID: 29949466 DOI: 10.2217/nnm-2017-0318] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [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: 11/21/2022] Open
Abstract
AIM Nanostructured lipid carriers in-gel (NLCs-gel) were prepared to enhance and improve the ocular delivery of dexamethasone. Materials & methods: NLCs containing dexamethasone prepared by high-pressure homogenization were characterized and dispersed into thermosensitive gels (Pluronic F127 and F68 as gels material). In vitro drug release studies, ocular irritation tests, ex vivo corneal penetration and drug dynamics of NLCs and NLCs-gel were evaluated in aqueous humor. RESULTS NLCs-gel exhibited a rapid sol-gel transition at 34.4°C and presented nano-sized, narrowly distributed particles. Corneal penetration studies revealed steady sustained drug release (Ritger-Peppas); NLCs-gel increased ocular bioavailability by prolonging precorneal retention time and improving corneal permeation. CONCLUSION These findings suggest developing NLCs-gel for potential treatment of posterior segment eye diseases.
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Affiliation(s)
- Zhenjie Mo
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Junfeng Ban
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Yan Zhang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Youyun Du
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Yifeng Wen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Xin Huang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Qingchun Xie
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Lou Shen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Shu Zhang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Hong Deng
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Dongzhi Hou
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Yanzhong Chen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
| | - Zhufen Lu
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, PR China.,R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, PR China
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Wen Y, Ban J, Mo Z, Zhang Y, An P, Liu L, Xie Q, Du Y, Xie B, Zhan X, Tan L, Chen Y, Lu Z. A potential nanoparticle-loaded in situ gel for enhanced and sustained ophthalmic delivery of dexamethasone. Nanotechnology 2018; 29:425101. [PMID: 30074486 DOI: 10.1088/1361-6528/aad7da] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Increasing the permeability of drugs across the cornea is key to improving drug absorption by the eye. This study presents a newly developed in situ gel loaded with nanoparticles, which could achieve controlled drug release and high ocular drug bioavailability by avoiding rapid precorneal clearance. The physicochemical parameters of the formulation were investigated and showed uniform size, physical stability, and favorable rheological and gelling properties. Ex vivo permeation studies revealed significantly higher drug release from the in situ gel loaded with nanoparticles compared to the conventional poloxamer in situ gel and the drug solution. When compared with a marketed formulation, the in situ gel loaded with nanoparticles provided slower controlled release and higher ocular bioavailability of dexamethasone. In conclusion, the developed nanoparticle-loaded in situ gel can successfully increase drug ocular bioavailability by enhancing contact time with the ocular surface and permeation through the cornea.
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Affiliation(s)
- Yifeng Wen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China. Guangdong Provincial Engineering Center of Topical Precise Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China. R&D Team for Formulation Innovation, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
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20
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Ban J, Ali S, Barber A, McNally L. Introduction of a head and neck cancer dental screening pro forma. Br Dent J 2018; 225:539-544. [DOI: 10.1038/sj.bdj.2018.760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/14/2018] [Indexed: 11/09/2022]
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21
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Sun Q, Wang W, Chen C, Ban J, Xu D, Zhu P, He MZ, Li T. Acute effect of multiple ozone metrics on mortality by season in 34 Chinese counties in 2013-2015. J Intern Med 2018; 283:481-488. [PMID: 29247470 PMCID: PMC6764438 DOI: 10.1111/joim.12724] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Although numerous multicentre studies have estimated the association between ozone exposure and mortality, there are currently no nationally representative multicentre studies of the ozone-mortality relationship in China. OBJECTIVE To investigate the effect on total (nonaccidental) and cause-specific mortality of short-term exposure to ambient ozone, and examine different exposure metrics. METHODS The effects of short-term exposure to ozone were analysed using various metrics (daily 1-h maximum, daily 8-h maximum and daily average) on total (nonaccidental) and cause-specific (circulatory and respiratory) mortality from 2013 to 2015 in 34 counties in 10 cities across China. We used distributed lag nonlinear models for estimating county-specific relative risk of mortality and combined the county-specific relative rates by conducting a random-effects meta-analysis. RESULTS In all-year analyses, a 10 μg m-3 increase in daily average, daily 1-h maximum and daily 8-h maximum ozone at lag02 corresponded to an increase of 0.6% (95% CI: 0.33, 0.88), 0.26% (95% CI: 0.12, 0.39) and 0.37% (95% CI: 0.2, 0.55) in total (nonaccidental) mortality, 0.66% (95% CI: 0.28, 1.04), 0.31% (95% CI: 0.11, 0.51) and 0.39% (95% CI: 0.16, 0.62) in circulatory mortality, and 0.57% (95% CI: -0.09, 1.23), 0.11% (95% CI: -0.22, 0.44) and 0.22% (95% CI: -0.28, 0.72) in respiratory mortality, respectively. These estimates had a different seasonal pattern by cause of death. In general, the seasonal patterns were consistent with the times of year when ozone concentrations are highest. CONCLUSIONS Our findings suggest that in China, the acute effects of ozone are more closely related to daily average exposure than any other metric.
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Affiliation(s)
- Q Sun
- Chinese Center for Disease Control and Prevention, National Institute of Environmental Health Sciences, Beijing, China
| | - W Wang
- Chinese Center for Disease Control and Prevention, National Institute of Environmental Health Sciences, Beijing, China
| | - C Chen
- Chinese Center for Disease Control and Prevention, National Institute of Environmental Health Sciences, Beijing, China
| | - J Ban
- Chinese Center for Disease Control and Prevention, National Institute of Environmental Health Sciences, Beijing, China
| | - D Xu
- Chinese Center for Disease Control and Prevention, National Institute of Environmental Health Sciences, Beijing, China
| | - P Zhu
- Chinese Center for Disease Control and Prevention, National Institute of Environmental Health Sciences, Beijing, China
| | - M Z He
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, USA
| | - T Li
- Chinese Center for Disease Control and Prevention, National Institute of Environmental Health Sciences, Beijing, China
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Abstract
The purpose of this study was to test the type and the degree of cytotoxic effects of epirubicin and radiation in combined treatment on Chinese hamster lung cells in vitro. Experiments were performed with proliferating tissue culture cells. Cell kill was determined by colony-forming ability. The maximum killing effects were obtained when simultaneous action of drug treatment and irradiation occurred. Their interaction was synergistic. Synergism depended on time of drug incubation (epirubicin present for 1 h). Slight antagonism was noted after prolonged drug action (24 h).
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Shi WY, Ban J, Li TT, Shi XM. [A review on the research progress related to ambient air pollution and depression]. Zhonghua Liu Xing Bing Xue Za Zhi 2018; 39:245-248. [PMID: 29495214 DOI: 10.3760/cma.j.issn.0254-6450.2018.02.021] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
It is reported that depression has caused heavy disease burden across the world, with an possible association between ambient air pollution and depressive symptoms. In this paper, we reviewed relative literature in this field and summarized the research events on association between ambient air pollution and depression, both in China and abroad and found that the results of the existed studies were inconsistent, with most studies showing that there existed a positive correlation between the exposure of air pollution and depression, but few studies showing the negative correlation or no correlation between the two.
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Affiliation(s)
- W Y Shi
- Department of Environmental Health Risk Assessment, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - J Ban
- Department of Environmental Health Risk Assessment, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - T T Li
- Department of Environmental Health Risk Assessment, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - X M Shi
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
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24
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Lin H, Xie Q, Huang X, Ban J, Wang B, Wei X, Chen Y, Lu Z. Increased skin permeation efficiency of imperatorin via charged ultradeformable lipid vesicles for transdermal delivery. Int J Nanomedicine 2018; 13:831-842. [PMID: 29467573 PMCID: PMC5811179 DOI: 10.2147/ijn.s150086] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Aim The aim of this work was to develop a novel vesicular carrier, ultradeformable liposomes (UDLs), to expand the applications of the Chinese herbal medicine, imperatorin (IMP), and increase its transdermal delivery. Methods In this study, we prepared IMP-loaded UDLs using the thin-film hydration method and evaluated their encapsulation efficiency, vesicle deformability, skin permeation, and the amounts accumulated in different depths of the skin in vitro. The influence of different charged surfactants on the properties of the UDLs was also investigated. Results The results showed that the UDLs containing cationic surfactants had high entrapment efficiency (60.32%±2.82%), an acceptable particle size (82.4±0.65 nm), high elasticity, and prolonged drug release. The penetration rate of IMP in cationic-UDLs was 3.45-fold greater than that of IMP suspension, which was the highest value among the vesicular carriers. UDLs modified with cationic surfactant also showed higher fluorescence intensity in deeper regions of the epidermis. Conclusion The results of our study suggest that cationic surfactant-modified UDLs could increase the transdermal flux, prolong the release of the drug, and serve as an effective dermal delivery system for IMP.
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Affiliation(s)
- Hongwei Lin
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Qingchun Xie
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Xin Huang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Junfeng Ban
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Bo Wang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Xing Wei
- Guangdong Shennong Chinese Medicine Research Institute, Guangzhou, People's Republic of China
| | - Yanzhong Chen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhufen Lu
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
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25
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Affiliation(s)
- J. Ban
- School of Mechanical EngineeringPurdue UniversityWest Lafayette IN47907
| | - R. Kumar
- School of Mechanical EngineeringPurdue UniversityWest Lafayette IN47907
| | - S. Agarwal
- School of Mechanical EngineeringPurdue UniversityWest Lafayette IN47907
| | - C. Wassgren
- School of Mechanical EngineeringPurdue UniversityWest Lafayette IN47907
- Dept. of Industrial and Physical Pharmacy (by courtesy)Purdue UniversityWest Lafayette IN47907
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26
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Liu H, Wei Y, Lu H, Wei S, Jiang T, Zhang Y, Ban J, Guo B. The determination and application of (87) Sr/(86) Sr ratio in verifying geographical origin of wheat. J Mass Spectrom 2017; 52:248-253. [PMID: 28294490 DOI: 10.1002/jms.3930] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 02/26/2017] [Accepted: 03/09/2017] [Indexed: 06/06/2023]
Abstract
As 87 Sr/86 Sr ratio plays a significant role in authenticating the geographical origin of foodstuff, it is important to identify where the 87 Sr/86 Sr signature in food comes from, and the methods of 87 Sr/86 Sr ratio analysis in food and environmental samples. Wheat with three genotypes, soil and groundwater samples were collected from three regions of China during harvest time of 2014. The 87 Sr/86 Sr ratios in the samples were determined by thermal ionization mass spectrometer in order to investigate the possible source of 87 Sr/86 Sr in wheat, and the concentrations of Rb and Sr in wheat and soils were also detected by inductively coupled plasma mass spectrometry and combined with 87 Sr/86 Sr ratio in order to trace the geographical origin of wheat. The 87 Sr/86 Sr ratio, the contents Rb and Sr, and Rb/Sr ratio of wheat and soil samples showed significant differences among three regions. The 87 Sr/86 Sr ratios and the concentrations of Rb and Sr in soils were higher than those in corresponding wheat. The 87 Sr/86 Sr ratio in wheat was identical to that corresponding soil NH4 NO3 extracts (labile fraction of soil) and groundwater. Wheat uptake more Rb than Sr. 3D distribution of 87 Sr/86 Sr, Rb and Sr could identify wheat samples from different regions clearly. The 87 Sr/86 Sr ratio of wheat reflects the 87 Sr/86 Sr ratio of the associated environment including soil and groundwater. It is expected that the use the parameters of 87 Sr/86 Sr ratio, the contents of Rb and Sr will allow to trace geographical origin of wheat. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- H Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, No.1 Nongda South Rd., Beijing, 100193, China
| | - Y Wei
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, No.1 Nongda South Rd., Beijing, 100193, China
| | - H Lu
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, No. 18 North Third Ring Rd., Beijing, 100029, China
| | - S Wei
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, No.1 Nongda South Rd., Beijing, 100193, China
| | - T Jiang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, No.1 Nongda South Rd., Beijing, 100193, China
| | - Y Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, No.1 Nongda South Rd., Beijing, 100193, China
| | - J Ban
- Shijiazhuang Academy of Agricultural and Forestry Sciences, No. 479 Shengli North Street, Shijiazhuang, 050041, China
| | - B Guo
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, No.1 Nongda South Rd., Beijing, 100193, China
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27
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Ban J, Zhang Y, Huang X, Deng G, Hou D, Chen Y, Lu Z. Corneal permeation properties of a charged lipid nanoparticle carrier containing dexamethasone. Int J Nanomedicine 2017; 12:1329-1339. [PMID: 28243093 PMCID: PMC5317251 DOI: 10.2147/ijn.s126199] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Drug delivery carriers can maintain effective therapeutic concentrations in the eye. To this end, we developed lipid nanoparticles (L/NPs) in which the surface was modified with positively charged chitosan, which engaged in hydrogen bonding with the phospholipid membrane. We evaluated in vitro corneal permeability and release characteristics, ocular irritation, and drug dynamics of modified and unmodified L/NPs in aqueous humor. The size of L/NPs was uniform and showed a narrow distribution. Corneal permeation was altered by the presence of chitosan and was dependent on particle size; the apparent permeability coefficient of dexamethasone increased by 2.7 and 1.8 times for chitosan-modified and unmodified L/NPs, respectively. In conclusion, a chitosan-modified system could be a promising method for increasing the ocular bioavailability of unmodified L/NPs by enhancing their retention time and permeation into the cornea. These findings provide a theoretical basis for the development of effective drug delivery systems in the treatment of ocular disease.
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Affiliation(s)
- Junfeng Ban
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yan Zhang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Xin Huang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Guanghan Deng
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Dongzhi Hou
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Yanzhong Chen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - Zhufen Lu
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
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Ng CT, Fong LY, Low YY, Ban J, Hakim MN, Ahmad Z. Nitric oxide participates in IFN-gamma-induced HUVECs hyperpermeability. Physiol Res 2016; 65:1053-1058. [PMID: 27539106 DOI: 10.33549/physiolres.933237] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The endothelial barrier function is tightly controlled by a broad range of signaling cascades including nitric oxide-cyclic guanosine monophosphate (NO-cGMP) pathway. It has been proposed that disturbances in NO and cGMP production could interfere with proper endothelial barrier function. In this study, we assessed the effect of interferon-gamma (IFN-gamma), a pro-inflammatory cytokine, on NO and cGMP levels and examined the mechanisms by which NO and cGMP regulate the IFN-gamma-mediated HUVECs hyperpermeability. The flux of fluorescein isothiocyanate-labeled dextran across cell monolayers was used to study the permeability of endothelial cells. Here, we found that IFN-gamma significantly attenuated basal NO concentration and the increased NO levels supplied by a NO donor, sodium nitroprusside (SNP). Besides, application of IFN-gamma also significantly attenuated both the basal cGMP concentration and the increased cGMP production donated by a cell permeable cGMP analogue, 8-bromo-cyclic GMP (8-Br-cGMP). In addition, exposure of the cell monolayer to IFN-gamma significantly increased HUVECs basal permeability. However, L-NAME pretreatment did not suppress IFN-gamma-induced HUVECs hyperpermeability. L-NAME pretreatment followed by SNP or SNP pretreatment partially reduced IFN-gamma-induced HUVECs hyperpermeability. Pretreatment with a guanylate cyclase inhibitor, 6-anilino-5,8-quinolinedione (LY83583), led to a further increase in IFN-gamma-induced HUVECs hyperpermeability. The findings suggest that the mechanism underlying IFN-gamma-induced increased HUVECs permeability is partly related to the inhibition of NO production.
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Affiliation(s)
- C T Ng
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia.
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29
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Truong AD, Ban J, Park B, Hong YH, Lillehoj HS. Characterization and functional analyses of a novel chicken CD8α variant X1 (CD8α1)1,2. J Anim Sci 2016; 94:2737-51. [DOI: 10.2527/jas.2015-0133] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ban J, Du ZH, Li TT. [Experience-based introduction on national public environmental health tracking program and its enlightenment]. Zhonghua Yu Fang Yi Xue Za Zhi 2016; 50:550-553. [PMID: 27256739 DOI: 10.3760/cma.j.issn.0253-9624.2016.06.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- J Ban
- Institute for Environmental Health and Related Product Safety, Chinese Center for Disease Control and Prevention, Beijing 100021, China
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McAndrew R, Ban J, Playle R. A comparison of computer- and hand-generated clinical dental notes with statutory regulations in record keeping. Eur J Dent Educ 2012; 16:e117-e121. [PMID: 22251334 DOI: 10.1111/j.1600-0579.2011.00684.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
INTRODUCTION Dental patient records should be of high quality, contain information to allow for good continuity of care and clinical defence (should the need ever arise) and, ideally, facilitate clinical audit. Handwritten dental records have been assessed for their compliance to statutory regulations, but the same cannot be levelled at computer-generated notes. This study aimed to compare and analyse the compliance of both methods of data recording with statutory regulations. METHOD Fifty consecutive sets of handwritten notes and 50 sets of computer-generated notes were audited for compliance with a number of legal requirements and desirable characteristics for dental records and the results compared. The standard set for compliance with all characteristics was 100%. RESULTS The computer-generated notes satisfied the set standard for 8 of the 11 legal requirements and three of six desirable characteristics. The handwritten notes satisfied the set standard for 1 of 11 legal requirements and none of the desirable characteristics. A statistical difference (using a 95% confidence interval) between the two methods was observed in 5 of 11 legal characteristics and three of six desirable characteristics, all of which were in favour of computer-generated notes. CONCLUSIONS Within the limitations of this study, computer-generated notes achieved a much higher compliance rate with the set parameters, making defence in cases of litigation, continuity of care and clinical audit easier and more efficient.
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Affiliation(s)
- R McAndrew
- Applied Clinical Research and Public Health, School of Dentistry, Cardiff University, Heath Park, Cardiff, UK.
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Ban J, Jug G, Mestdagh P, Schwentner R, Kauer M, Aryee DNT, Schaefer KL, Nakatani F, Scotlandi K, Reiter M, Strunk D, Speleman F, Vandesompele J, Kovar H. Hsa-mir-145 is the top EWS-FLI1-repressed microRNA involved in a positive feedback loop in Ewing's sarcoma. Oncogene 2011; 30:2173-80. [PMID: 21217773 DOI: 10.1038/onc.2010.581] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
EWS-FLI1 is a chromosome translocation-derived chimeric transcription factor that has a central and rate-limiting role in the pathogenesis of Ewing's sarcoma. Although the EWS-FLI1 transcriptomic signature has been extensively characterized on the mRNA level, information on its impact on non-coding RNA expression is lacking. We have performed a genome-wide analysis of microRNAs affected by RNAi-mediated silencing of EWS-FLI1 in Ewing's sarcoma cell lines, and differentially expressed between primary Ewing's sarcoma and mesenchymal progenitor cells. Here, we report on the identification of hsa-mir-145 as the top EWS-FLI1-repressed microRNA. Upon knockdown of EWS-FLI1, hsa-mir-145 expression dramatically increases in all Ewing's sarcoma cell lines tested. Vice versa, ectopic expression of the microRNA in Ewing's sarcoma cell lines strongly reduced EWS-FLI1 protein, whereas transfection of an anti-mir to hsa-mir-145 increased the EWS-FLI1 levels. Reporter gene assays revealed that this modulation of EWS-FLI1 protein was mediated by the microRNA targeting the FLI1 3'-untranslated region. Mutual regulations of EWS-FLI1 and hsa-mir-145 were mirrored by an inverse correlation between their expression levels in four of the Ewing's sarcoma cell lines tested. Consistent with the role of EWS-FLI1 in Ewing's sarcoma growth regulation, forced hsa-mir-145 expression halted Ewing's sarcoma cell line growth. These results identify feedback regulation between EWS-FLI1 and hsa-mir-145 as an important component of the EWS-FLI1-mediated Ewing's sarcomagenesis that may open a new avenue to future microRNA-mediated therapy of this devastating malignant disease.
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Affiliation(s)
- J Ban
- Children's Cancer Research Institute, St Anna Kinderkrebsforschung, Vienna, Austria
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Kovar H, Kauer M, Mesdagh P, Ban J, Niedan S, Jug G, Speleman F, Poremba C, Aryee D. The "Ideal" Target's Network: Factors Modulating EWS-FLI1 Expression and Function in Ewing's Sarcoma. Klin Padiatr 2010. [DOI: 10.1055/s-0030-1270309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lee J, Lee B, Kim J, Choi J, Ban J, Park J. HSP27 MAY BE INVOLVED IN INITIATION OF ATHEROSCLEROSIS BY REGULATING ENDOGENOUS CYTOKINES/CHEMOKINES AND THEIR RECEPTORS EXPRESSION IN VESSEL WALL. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70197-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kim J, Kim N, Choi J, Ban J, Lee J, Lee B, Chung D, Park J. LACTOBACILLUS PLANTARUM LIPOTEICHOIC ACID DOWN-REGULATES LPS AND TNF-ALPHA-INDUCED INFLAMMATORY CYTOKINES BY INHIBITING CHEMOKINES AND CELLULAR ADHESION MOLECULES IN VASCULAR CELLS. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70199-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Choi J, Ban J, Ryoo K, Koh Y, Shin H, Lee B, Park J. PO12-326 LOSARTAN REDUCED THE ATHEROSCLEROTIC LESIONS IN THE CHOLESTEROL-FED APO E(−/−) MICE. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71336-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
mdm2 encodes for an E3 ubiquitin ligase targeting constitutively expressed p53 for proteasomal degradation. Several protein isoforms have been described for human MDM2 (HDM2), some of which may correspond to splicing variants detectable by RT-PCR in many tumors. Upon cellular stress, p53 becomes resistant to MDM2 and, in a feedback loop, up-regulates mdm2 transcription. The physiological relevance of stress-induced mdm2 gene activity is not well understood. We describe a small nuclear RNA of 365 bases comprised of the first five hdm2 exons and lacking polyadenylation. hdm365 precedes full-length hdm2 RNA expression after induction by p53 and accumulates to significant levels in the nucleus, detectable at the site of hdm2 transcription and processing only. Considering a 10-fold lower stability and high steady-state levels of the novel RNA species, hdm365 appears to be the major processing product of hdm2 transcripts. hdm365 induction was observed after ectopic expression of p53 and after DNA damaging treatment of tumor cell lines, primary fibroblasts and lymphocytes, and was not related to apoptosis. Corresponding truncated transcripts were observed in hdm2 amplified cells. High stress-inducible expression levels, absence of a corresponding protein, and nuclear localisation of hdm365 suggest a novel RNA-based function for hdm2.
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Affiliation(s)
- S Bartl
- Children's Cancer Research Institute, St Anna Kinderspital, Kinderspitalgasse 6, Vienna A-1090, Austria
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Eckhart L, Henry M, Santos-Beneit AM, Schmitz I, Krueger A, Fischer H, Bach J, Ban J, Kirchhoff S, Krammer PH, Mollinedo F, Tschachler E. Alternative splicing of caspase-8 mRNA during differentiation of human leukocytes. Biochem Biophys Res Commun 2001; 289:777-81. [PMID: 11735112 DOI: 10.1006/bbrc.2001.6055] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Caspase-8 is a key initiator of death receptor-induced apoptosis. Here we provide evidence that caspase-8 expression is subject to posttranscriptional regulation in human leukocytes. Resting peripheral blood lymphocytes preferentially use a distant splice donor site at the 3'-end of caspase-8 exon 8 to generate mRNAs with a truncated open reading frame. When lymphocytes were activated, the expression of caspase-8 variants was shifted to caspase-8/a and b which lack the extension of exon 8. The opposite change of the splicing pattern was found in a neutrophil differentiation model. Promyelocytic HL-60 cells mainly expressed caspase-8 mRNAs with the normal exon 8, but the splicing pattern was changed to the distant exon 8 splice site during DMSO-induced differentiation of HL-60 cells. In spite of the presence of these novel mRNAs, the corresponding translation products were not detectable in either cell type. Our findings suggest that leukocyte differentiation and alternative splicing of caspase-8 pre-mRNA are inter-dependent processes.
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Affiliation(s)
- L Eckhart
- Department of Dermatology, University of Vienna Medical School, Vienna, A-1090, Austria
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Eckhart L, Declercq W, Ban J, Rendl M, Lengauer B, Mayer C, Lippens S, Vandenabeele P, Tschachler E. Terminal differentiation of human keratinocytes and stratum corneum formation is associated with caspase-14 activation. J Invest Dermatol 2000; 115:1148-51. [PMID: 11121154 DOI: 10.1046/j.1523-1747.2000.00205.x] [Citation(s) in RCA: 162] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Programmed cell death of epidermal keratinocytes (KC) results in the formation of cornified cells, which constitute the outermost skin layer, the stratum corneum. Here we show by reverse transcription-polymerase chain reaction, western blot, and immunohistochemistry that epidermal KC express caspase-14, a member of the caspase family of pro-apoptotic proteases, in a tissue-specific manner. Caspase-14 protein abundance strongly increases during terminal differentiation of KC in vivo and in vitro. Under conditions that lead to stratum corneum formation caspase-14 cleavage products, which indicate proenzyme activation, appeared in the KC lysates. Cleavage of the enzyme was also detected in lysates from normal human epidermis and in extracts of stratum corneum. Our findings demonstrate that caspase-14 is activated during KC differentiation and strongly suggest that it is involved in the formation of the human skin barrier.J Invest Dermatol 115:1148-1151 2000
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Affiliation(s)
- L Eckhart
- Division of Immunology, Allergy and Infectious Diseases, Department of Dermatology, University of Vienna Medical School, Vienna, Austria
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Ban J, Maysinger D, Kovac V, Galetić I, Matulić M, Hadzija M, Uzarević B. Molecular mechanisms involved in the antiproliferative action of protein tyrosine phosphatase inhibitor potassium bisperoxo(1,10-phenanthroline)oxovanadate. Life Sci 2000; 68:165-75. [PMID: 11191635 DOI: 10.1016/s0024-3205(00)00926-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Potassium bisperoxo(1,10-phenanthroline)oxovanadate, bpV(phen), a powerful protein phosphotyrosine phosphatase inhibitor and a potent insulinomimetic, influenced three fundamental cellular processes in HL-60 human leukemic cells: 1) inhibition of proliferation, 2) induction of differentiation and 3) apoptotic cell death. In the presence of micromolar concentrations of bpV(phen) cell number and DNA synthesis decreased progressively with time of incubation. A single treatment with bpV(phen) (3 microM) activated a differentiation program; after 6 days of incubation 82% of cells were differentiated, but differentiation started already within the first 24 h. Concentrations of 5-10 microM bpV(phen) caused the characteristic DNA ladder pattern, starting after 4.5 h. Differentiation in HL-60 cells appear to be associated with activation of extracellular signal-regulated kinase while apoptosis is connected with phosphorylation and activation of both extracellular signal-regulated kinase and c-Jun N-terminal kinase in a concentration and time-dependent manner. The antiproliferative and apoptotic action of bpV(phen) could be exploited in combination chemotherapy in leukemia.
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Affiliation(s)
- J Ban
- Department of Molecular Biology, Faculty of Science, University of Zagreb, Croatia.
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Eckhart L, Ban J, Fischer H, Tschachler E. Caspase-14: analysis of gene structure and mRNA expression during keratinocyte differentiation. Biochem Biophys Res Commun 2000; 277:655-9. [PMID: 11062009 DOI: 10.1006/bbrc.2000.3698] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Caspase-14 is expressed in a tissue-specific manner in mouse skin. Here we determined the complete caspase-14 cDNA sequence of human caspase-14 by rapid amplification of cDNA ends. Sequence comparison with a cosmid clone containing genomic DNA revealed that the human caspase-14 gene comprises seven exons. Facultative utilization of a cryptic splice acceptor site within intron 5 leads to the formation of two mRNA species. In situ hybridization of human skin showed that caspase-14 is expressed in the uppermost layer of living epidermal cells, i.e., the granular layer, in hair follicles and sebaceous glands. In vitro caspase-14 transcription was low in subconfluent cultures but strongly increased when keratinocyte differentiation was simulated by maintaining cells at confluence for several days. This transcriptional upregulation was suppressed in the presence of a high extracellular calcium concentration. Our findings show that caspase-14 is regulated at the level of transcription during keratinocyte differentiation in vitro and in vivo.
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Affiliation(s)
- L Eckhart
- Division of Immunology, Allergy, and Infectious Diseases, University of Vienna Medical School, Vienna, Austria
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Weninger W, Rendl M, Mildner M, Mayer C, Ban J, Geusau A, Bayer G, Tanew A, Majdic O, Tschachler E. Keratinocytes express the CD146 (Muc18/S-endo) antigen in tissue culture and during inflammatory skin diseases. J Invest Dermatol 2000; 115:219-24. [PMID: 10951239 DOI: 10.1046/j.1523-1747.2000.00039.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The CD146 (or MUC18/MEL-CAM) antigen is a cell adhesion molecule of the immunoglobulin superfamily. Besides in melanoma, expression of CD146 antigen has been demonstrated in breast epithelia and hair follicles. We studied its expression by human keratinocytes in culture as well as in neoplastic and inflammatory skin diseases. Staining of primary cultured keratinocytes revealed expression of CD146 on the cell membrane, preferentially on cell-cell contact sites. Western blot analysis of keratinocytes detected a band of approximately 113 kDa, corresponding to the CD146 protein. In contrast to primary keratinocytes, neither CD146 protein nor mRNA expression was found in the keratinocyte-derived cell lines A431 and HaCaT. Treatment of keratinocytes with the proinflammatory cytokines interleukin-1 and interleukin-6, tumor necrosis factor-alpha, and interferon-gamma, resulted in no change of CD146 expression and incubation with phorbol 12-myristate 13-acetate led to a reduction of CD146 on keratinocytes. By contrast, when culturing keratinocytes in medium devoid of growth supplements, a distinct upregulation was observed as compared with culture in fully supplemented medium. In normal human epidermis expression of the CD146 antigen was not detectable. It was strongly upregulated, however, on suprabasal keratinocytes in psoriasis, in lichen planus, in the epidermis overlying skin neoplasms, and in viral warts. In squamous cell carcinomas and basal cell carcinomas only a minority of tumor cells expressed CD146. Our findings suggest that the CD146 antigen represents an activation marker of keratinocytes and may be involved in cutaneous inflammatory tissue reaction.
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Affiliation(s)
- W Weninger
- Division of Immunology, Allergy, and Infectious Diseases, Division of Special and Environmental Dermatology, Department of Dermatology, Institute of Immunology, University of Vienna Medical School, Vienna, Austria
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Abstract
We found that both RNA and cDNA preparations derived from melanocytes contain a RT-PCR inhibitor that copurified with nucleic acids. Investigation of the candidate inhibitor melanin revealed that it potently blocks PCR at concentrations below 200 ng/ml, whereas 100 microg/ml melanin was required to inhibit reverse transcription. Melanin and thermostable DNA polymerase preferentially formed a distinct complex with reduced migration velocity as compared to pure polymerase in nondenaturating polyacrylamide gel electrophoresis. The inhibition of the enzyme by melanin could be reversed by diluting solutions of preformed complexes or by adding excess amounts of other proteins such as bovine serum albumin or dry milk. Our findings demonstrate that melanin is a potent inhibitor of thermostable DNA polymerase in vitro and that the inhibitory effect is conferred by a direct and reversible polymerase-melanin interaction.
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Affiliation(s)
- L Eckhart
- Department of Dermatology, University Vienna Medical School, Vienna, Austria
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Rezaie S, Ban J, Mildner M, Poitschek C, Brna C, Tschachler E. Characterization of a cDNA clone, encoding a 70 kDa heat shock protein from the dermatophyte pathogen Trichophyton rubrum. Gene 2000; 241:27-33. [PMID: 10607895 DOI: 10.1016/s0378-1119(99)00475-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Trichophyton rubrum is an anthropophilic fungus causing up to 90% of chronic cases of dermatophytosis. To characterize T. rubrum proteins at the molecular level, we established a cDNA library of this pathogen. Here we describe a recombinant cDNA clone identical to eukaryotic 70kDa heat-shock proteins (HSPs). Western blot analysis using an anti HSP70 monoclonal antibody detected a recombinant fusion protein in Escherichia coli transformed with the expression vector containing the cloned cDNA insert. Southern blot analysis of T. rubrum genomic DNA detected no other members of the HSP70 gene family. Further analysis revealed the presence of two introns within the ORF of the HSP70 gene. In Northern blot analysis, the cDNA clone was hybridized to a RNA species of about 3.5kb which was constitutively expressed by cells cultured at 27 degrees C and was strongly up-regulated after culture at 37 degrees C. In summary, we have cloned the first member of the HSP family of dermatophytes and characterized it as a member of the Dnak subfamily of 70kDa HSPs.
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Affiliation(s)
- S Rezaie
- Division of Immunology, Allergy and Infectious Diseases, Department of Dermatology, University of Vienna Medical School, Währinger Gürtel 18-20, A-1090, Vienna, Austria
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Ban J, Hlavaty J, Orlik O, Splitter GA, Altaner C. The human homologue of the bovine leukemia virus receptor BLVRcp1 is the delta-subunit of adaptor-related AP-3 protein that does not bind the BVLgp51. Arch Virol 1999; 144:2013-22. [PMID: 10550673 DOI: 10.1007/s007050050722] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The relationship between the putative bovine leukemia virus receptor gene (BVLRcp) and the susceptibility of human cells to BLV infection was studied. Three cDNA clones encoding different portions of the human equivalent of bovine BLVRcp1 were isolated by DNA-DNA hybridization by comparison of the human cDNA clones to bovine BLVRcp1. Amino acid sequence indicated that the human sequence encodes the delta subunit of the AP-3 adaptor-related protein. When the recombinant human homologue BLVRcp2 was expressed in E. coli, it failed to bind the BLVgp51. However, the BVLVgp51 binding ability was restored when the chimerical BLVRcp molecule was prepared by exchanging 5' ends between bovine and human BLVRcp cDNAs. This finding implies that this BLVgp51 binding site is present only on the bovine BLVRcp and therefore its human homologue cannot be recognized by BLVgp51. This might also explain the resistance of human cells to BLV infection.
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Affiliation(s)
- J Ban
- Cancer Research Institute of the Slovak Academy of Sciences, Bratislava, Slovakia
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Pammer J, Weninger W, Ban J, Wojta J, Tschachler E. The cell death regulatory protein bak is expressed in endothelial cells in inflamed tissues and Is induced by IFN-gamma in vitro. Biochem Biophys Res Commun 1999; 264:139-43. [PMID: 10527854 DOI: 10.1006/bbrc.1999.1436] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present report, we examined the endothelial expression of the anti- and pro-apoptotic proteins Bcl-2 and Bak in situ and in vitro. Endothelial cells (EC) in regular tissue of the bowel and the skin were essentially negative for both Bcl-2 and Bak. In contrast, EC within the walls of fistulas and abscesses in these organs stained distinctly for Bak, but remained Bcl-2-negative. In tissue culture both unstimulated human dermal microvascular endothelial cells (HDMEC) and human umbilical vein endothelial cells (HUVEC) expressed Bcl-2 and Bak constitutively. Exposure of EC to 200-1000 IU IFN-gamma downregulated Bcl-2 but upregulated Bak. This opposing regulation of Bcl-2 and Bak in vitro and the expression of Bak in EC adjacent to necrotic tissue areas suggests that this pro-apoptotic protein may play a decisive role in regulation of EC survival in vivo.
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Affiliation(s)
- J Pammer
- Institute of Clinical Pathology, University of Vienna, Vienna, A-1090, Austria
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Mildner M, Weninger W, Trautinger F, Ban J, Tschachler E. UVA and UVB radiation differentially regulate vascular endothelial growth factor expression in keratinocyte-derived cell lines and in human keratinocytes. Photochem Photobiol 1999; 70:674-9. [PMID: 10546564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Vascular endothelial growth factor (VEGF) is a central regulator of neoangiogenesis in inflammatory and neoplastic conditions. Ultraviolet irradiation is one of the mainstays of dermatological therapy for various inflammatory skin diseases. In the present study we have compared the effects of UV irradiation on the production of VEGF by keratinocytes (KC) and by the KC-derived cell lines A431 and HaCaT. Irradiation of A431 and HaCaT cells with both UVA (10 J/cm2 and 20 J/cm2) and UVB (8 mJ/cm2 and 16 mJ/cm2) led to strong upregulation of VEGF mRNA and protein. Induction of VEGF by UVA and UVB in these cells was mediated by different pathways, i.e. the generation of free radicals and the secretion of (a) soluble factor(s), respectively. Unlike KC-derived cell lines, no increase in VEGF production was observed in KC in primary culture after irradiation with the same UV doses. Increasing the irradiation dose in these cells of UVA to 40 J/cm2 led to a marked decrease in soluble VEGF, whereas doses as high as 32 mJ/cm2 UVB only minimally affected VEGF levels. Reduction of VEGF production by KC might contribute to the effect of UVA irradiation in inflammatory skin diseases. The differential response of primary KC and autonomously growing KC-derived cell lines to the induction of VEGF by UV light could favor neoangiogenesis in the vicinity of epidermal tumor cells in vivo, thereby endowing them with a growth advantage over normal cells.
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Affiliation(s)
- M Mildner
- Division of Immunology, Allergy and Infectious Diseases, Vienna Medical School, Austria
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Abstract
Potassium bisperoxo(1,10-phenantroline)oxovanadate (V) [bpV(phen)] is a potent protein tyrocine phosphatase inhibitor which mediates a variety of biological effects. The aim of these studies was to examine the role(s) of mitogen activated protein kinase (MAPK) pathways in PC12 cell proliferation and toxicity by bpV(phen). BpV(phen) exerts a bimodal effect in PC12 cells: proliferation at low and cell death at higher micromolar concentrations. Activation of MAPK by bpV(phen) depends on time and concentration. The phosphorylation pattern of extracellular regulated kinases (ERK 1/2), c-jun N-terminal activated kinases (JNK) and p38 in PC12 cells is strikingly different. Activation of JNK is sustained in PC12 cells. In contrast, ERK 1/2 activation is transient and treatment with PD98059 indicates that ERK activation by bpV(phen) is partly independent from the ras-MEK pathway. Stability studies of bpV(phen) in DMEM and PBS showed linear relationship with T1/2 about 6 h and 10 days in DMEM and PBS, respectively. Comparison between the time courses of MAPK activation and kinetics of bpV(phen) decomposition as assessed by 51V-NMR analysis show that the initial and maximal phosphorylation signals are produced in the presence of the complex bpV(phen) and not caused by the decomposition products of bpV(phen).
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Affiliation(s)
- Z Cerovac
- Department of Molecular Biology, Faculty of Science, University of Zagreb, Croatia
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Eckhart L, Ban J, Ballaun C, Weninger W, Tschachler E. Reverse transcription-polymerase chain reaction products of alternatively spliced mRNAs form DNA heteroduplexes and heteroduplex complexes. J Biol Chem 1999; 274:2613-5. [PMID: 9915788 DOI: 10.1074/jbc.274.5.2613] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Reverse transcription-polymerase chain reaction (RT-PCR) is frequently used to simultaneously detect mRNA isoforms, which are generated by alternative splicing. Here we characterize two previously unrecognized RT-PCR products of vascular endothelial growth factor (VEGF) RNA. DNA products with apparent sizes of 600 and 1200 base pairs (bp) were detected at high cycle numbers. Heat denaturation of the smaller product and subsequent reannealing revealed that it was a heteroduplex consisting of two different DNA strands. These were identified by DNA sequencing as the amplification products of two VEGF transcripts, i.e. VEGF121 and VEGF165, which differ by the presence of one exon. S1 nuclease analysis showed that this exon is bulged out as a single-stranded loop. Purified heteroduplexes in solution were found to form a 1200-bp DNA product which could be reconverted into 600-bp DNA heteroduplexes by mild denaturation at 70 degreesC. These findings suggest that this product is formed by base pairing of complementary heteroduplex loops and represents a novel four-stranded DNA structure.
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Affiliation(s)
- L Eckhart
- Department of Dermatology, University Vienna Medical School, A-1090 Vienna, Austria
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Abstract
Alternative splicing has been shown to generate two isoforms of the apoptosis regulator bcl-x, Bcl-xL and Bcl-xS, in humans. Here we describe the identification and characterization of a third splice variant of the human bcl-x gene. It differs from previously described bcl-x transcripts in two respects: (1) a novel facultative intron is spliced out at the 5' untranslated region and (2) the open reading frame arises from a continuous genomic sequence extending over the splice donor sites utilized by the bcl-xL and bcl-xS transcripts. Since the resulting molecule has an organisation homologous to mouse and rat Bcl-x beta we suggest calling this novel protein human Bcl-x beta. Northern blot analysis revealed that bcl-x beta mRNA is expressed in numerous cell lines. Like Bcl-xL, h-Bcl-x binds to the pro-apoptotic protein Bax, suggesting a functional activity in vivo.
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Affiliation(s)
- J Ban
- Department of Dermatology, University Vienna Medical School, Austria
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