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Guler E, Nur Hazar-Yavuz A, Tatar E, Morid Haidari M, Sinemcan Ozcan G, Duruksu G, Graça MPF, Kalaskar DM, Gunduz O, Emin Cam M. Oral empagliflozin-loaded tri-layer core-sheath fibers fabricated using tri-axial electrospinning: Enhanced in vitro and in vivo antidiabetic performance. Int J Pharm 2023; 635:122716. [PMID: 36791999 DOI: 10.1016/j.ijpharm.2023.122716] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/16/2023]
Abstract
Empagliflozin (EM) was successfully loaded in polycaprolactone/poly (L-lactic acid)/polymethyl methacrylate (PCL/PLA/PMMA) fibers. In the rat β-cell line (BRIN-BD11), the insulin expression ratio of pancreatic β-cells was stimulated at high and low glucose by culturing with tri-layer EM-loaded fiber (EMF) for 48 h. The expression ratios of glucokinase and GLUT-2 proteins increased after EMF treatment. According to the in vitro drug release test, 97% of all drug contained in fibers was released in a controlled manner for 24 h. The pharmacokinetic test revealed that the bioavailability was improved ∼4.8-fold with EMF treatment compared to EM-powder and blood glucose level was effectively controlled for 24 h with EMF. Oral administration of EMF exhibited a better sustainable anti-diabetic activity even in the half-dosage than EM-powder in streptozotocin/nicotinamide-induced T2DM rats. The levels of GLP-1, PPAR-γ, and insulin were increased while the levels of SGLT-2 and TNF-α were decreased with EMF treatment. Also, EMF recovered the histopathological changes in the liver, pancreas, and kidney in T2DM rats and protected pancreatic β-cells. Consequently, EMF is suggested as an unprecedented and promotive treatment approach for T2DM with a higher bioavailability and better antidiabetic effect compared to conventional dosage forms.
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Affiliation(s)
- Ece Guler
- Department of Pharmacology, Faculty of Pharmacy, Marmara University, Istanbul 34854, Turkey; Center for Nanotechnology and Biomaterials Application and Research, Marmara University, Istanbul 34722, Turkey; UCL Division of Surgery and Interventional Science, Royal Free Hospital Campus, University College London, Rowland Hill Street, NW3 2PF, UK
| | - Ayse Nur Hazar-Yavuz
- Department of Pharmacology, Faculty of Pharmacy, Marmara University, Istanbul 34854, Turkey
| | - Esra Tatar
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Marmara University, Istanbul 34854, Turkey
| | - Mohammad Morid Haidari
- Department of Pharmacology, Faculty of Pharmacy, Marmara University, Istanbul 34854, Turkey
| | - Gul Sinemcan Ozcan
- Stem Cell and Gene Therapies Research and Applied Center, Medical Faculty, Kocaeli University, Kocaeli 41380, Turkey
| | - Gokhan Duruksu
- Stem Cell and Gene Therapies Research and Applied Center, Medical Faculty, Kocaeli University, Kocaeli 41380, Turkey
| | | | - Deepak M Kalaskar
- UCL Division of Surgery and Interventional Science, Royal Free Hospital Campus, University College London, Rowland Hill Street, NW3 2PF, UK
| | - Oguzhan Gunduz
- Center for Nanotechnology and Biomaterials Application and Research, Marmara University, Istanbul 34722, Turkey; Department of Metallurgy and Material Engineering, Faculty of Technology, Marmara University, Istanbul 34722, Turkey
| | - Muhammet Emin Cam
- Department of Pharmacology, Faculty of Pharmacy, Marmara University, Istanbul 34854, Turkey; Center for Nanotechnology and Biomaterials Application and Research, Marmara University, Istanbul 34722, Turkey; UCL Division of Surgery and Interventional Science, Royal Free Hospital Campus, University College London, Rowland Hill Street, NW3 2PF, UK; Biomedical Engineering Department, University of Aveiro, 3810-193 Aveiro, Portugal; Genetic and Metabolic Diseases Research and Investigation Center, Marmara University, 34854 Istanbul, Turkey.
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A linear tetranuclear Ni(II) acyl hydrazone Schiff base complex: preparation, crystal structure and catalytic application. TRANSIT METAL CHEM 2022. [DOI: 10.1007/s11243-022-00501-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Campana C, Léger R, Sonnier R, Ienny P, Ferry L. Effect of Hygrothermal Ageing on the Mechanical and Fire Properties of a Flame Retardant Flax Fiber/Epoxy Composite. Polymers (Basel) 2022; 14:polym14193962. [PMID: 36235910 PMCID: PMC9573111 DOI: 10.3390/polym14193962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/13/2022] [Accepted: 09/16/2022] [Indexed: 11/16/2022] Open
Abstract
In engineering applications, natural fiber composites must comply with fire requirements including the use of flame retardant. Furthermore, biocomposites are known to be water sensitive. Whether flame retardants affect the water sensitivity and whether water absorption affects the fire behavior and the mechanical performance of biocomposites are the two main topics addressed in this work. In this study, a flax fiber/epoxy composite flame retardant with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) or aluminum diethyl phosphinate (AlPi) was aged in humid atmosphere or by immersion in water. Water absorption kinetics revealed that DOPO induces an increase in equilibrium water content by approximately a factor of 2 due to its intrinsic hygroscopicity and/or its plasticizing effect on the epoxy matrix. In contrast, AlPi does not significantly change the water sensitivity of the biocomposite. Mechanical testing highlighted that, whatever the FR, the evolution of mechanical properties with ageing is governed by the moisture content. The drop of elastic modulus was attributed to a decrease in fiber rigidity due to plasticization, while the increase in tensile strength was assigned to an increase in fiber/matrix friction due to fiber swelling. As regards flame retardancy, only the highest water contents modified the fire behavior. For the AlPi containing biocomposite, the water release resulted in an increase by 50% of the time to ignition, while for the DOPO flame retardant biocomposite the water release was mainly postponed after ignition.
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Affiliation(s)
- Charlotte Campana
- Polymers Composites and Hybrids (PCH), IMT Mines Alès, F-30319 Alès, France
- LMGC, IMT Mines Ales, Montpellier University, CNRS, F-30319 Alès, France
| | - Romain Léger
- LMGC, IMT Mines Ales, Montpellier University, CNRS, F-30319 Alès, France
| | - Rodolphe Sonnier
- Polymers Composites and Hybrids (PCH), IMT Mines Alès, F-30319 Alès, France
| | - Patrick Ienny
- LMGC, IMT Mines Ales, Montpellier University, CNRS, F-30319 Alès, France
| | - Laurent Ferry
- Polymers Composites and Hybrids (PCH), IMT Mines Alès, F-30319 Alès, France
- Correspondence:
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Zhan Z, Wang L, Zhang Y, Weng S, Sun M, Li L. Fabrication of multifunctional polymethyl methacrylate composites based on phosphorus‐containing polyaniline with excellent flame retardancy and electrical conductivity. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.5205] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zhaoshun Zhan
- College of Environmental and Chemical Engineering Heilongjiang University of Science and Technology Harbin China
| | - Li Wang
- College of Environmental and Chemical Engineering Heilongjiang University of Science and Technology Harbin China
| | - Yaolong Zhang
- College of Environmental and Chemical Engineering Heilongjiang University of Science and Technology Harbin China
| | - Shihan Weng
- College of Environmental and Chemical Engineering Heilongjiang University of Science and Technology Harbin China
| | - Menghan Sun
- College of Environmental and Chemical Engineering Heilongjiang University of Science and Technology Harbin China
| | - Lixin Li
- College of Environmental and Chemical Engineering Heilongjiang University of Science and Technology Harbin China
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