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Chen X, Zhong L, Gong X. Robust Superhydrophobic Films Based on an Eco-Friendly Poly(l-lactic acid)/Cellulose Composite with Controllable Water Adhesion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10362-10373. [PMID: 38691669 DOI: 10.1021/acs.langmuir.4c01077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Poly(l-lactic acid) (PLLA) featuring desirable biodegradability and biocompatibility has been recognized as one of the promising eco-friendly biomaterials. However, low crystallization and poor mechanical and chemical performances dramatically hamper its practical application. In this work, we report that functionalized cellulose/PLLA composite superhydrophobic stereocomplex films with controllable water adhesion and protein adsorption can be fabricated by a facile approach for the first time. First, cellulose is surface-modified by means of two silanization modification methods. Then, superhydrophobic cellulose/PLLA composite films are prepared through a solvent-evaporation-induced phase separation method. The two cellulose/PLLA composite films exhibit extreme water repellency but tunable water adhesion from sticky to slippery. The protein adsorption capacity of the cellulose/PLLA composite films can also be regulated. In addition, the stereocomplexation of the composite film provides excellent mechanical properties with an elongation at break of 22.36%, which is 237.8% higher than that of a pure PLLA film, which is more suitable for biomaterials. Furthermore, good biodegradability of the PLLA composite films in nature enables the bio-based composites as alternative materials to replace conventional petroleum-based polymers. The superhydrophobic films have also been demonstrated for many applications, including slippery surfaces, liquid transportation without loss, and antifouling.
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Affiliation(s)
- Xuefeng Chen
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, Hubei 430070, People's Republic of China
| | - Lingqi Zhong
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, Hubei 430070, People's Republic of China
| | - Xiao Gong
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, Hubei 430070, People's Republic of China
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Yahoum MM, Toumi S, Tahraoui H, Lefnaoui S, Kebir M, Amrane A, Assadi AA, Zhang J, Mouni L. Formulation and Evaluation of Xanthan Gum Microspheres for the Sustained Release of Metformin Hydrochloride. MICROMACHINES 2023; 14:609. [PMID: 36985017 PMCID: PMC10055444 DOI: 10.3390/mi14030609] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
This work aimed to formulate xanthan gum microspheres for the encapsulation of metformin hydrochloride, according to the process of ionotropic gelation. The obtained microparticles, based on various fractions of xanthan gum (0.5-1.25), were subjected to different physico-chemical tests and a drug release study. Microspheres with an average size varying between 110.96 μm and 208.27 μm were obtained. Encapsulation efficiency reached 93.11% at a 1.25% biopolymer concentration. The swelling study showed a swelling rate reaching 29.8% in the gastric medium (pH 1.2) and 360% in the intestinal medium (pH 6.8). The drug release studies showed complete metformin hydrochloride release from the beads, especially those prepared from xanthan gum at the concentration of 1.25%, in intestinal medium at 90.00% after 6 h. However, limited and insignificant drug release was observed within the gastric medium (32.50%). The dissolution profiles showed sustained release kinetics.
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Affiliation(s)
- Madiha Melha Yahoum
- Materials and Environmental Laboratory (LME), University of Medea, Nouveau Pole Urbain, Medea 26000, Algeria
| | - Selma Toumi
- Faculty of Sciences, University of Medea, Nouveau Pole Urbain, Medea 26000, Algeria
| | - Hichem Tahraoui
- Laboratoire de Génie des Procédés Chimiques, Department of Process Engineering, University of Ferhat Abbas, Sétif 19000, Algeria
- Laboratory of Biomaterials and Transport Phenomena (LBMTP), University Yahia Fares, Médéa 26000, Algeria
| | - Sonia Lefnaoui
- Laboratory of Experimental Biology and Pharmacolgy, University of Medea, Nouveau Pole Urbain, Medea 26000, Algeria
| | - Mohammed Kebir
- Research Unit on Analysis and Tecshnological Development in Environment (URADTE-CRAPC), MB 384, Tipaza 42000, Algeria
| | - Abdeltif Amrane
- National Center for Scientific Research (CNRS), National School of Chemistry of Rennes, University of Rennes, ISCR—UMR6226, F-35000 Rennes, France
| | - Aymen Amin Assadi
- National Center for Scientific Research (CNRS), National School of Chemistry of Rennes, University of Rennes, ISCR—UMR6226, F-35000 Rennes, France
- College of Engineering, Imam Mohammad Ibn Saud Islamic University, IMSIU, Riyadh 11432, Saudi Arabia
| | - Jie Zhang
- School of Engineering, Merz Court, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| | - Lotfi Mouni
- Laboratory of Management and Valorization of Natural Resources and Quality Assurance, SNVST Faculty, Akli Mohand Oulhadj University, Bouira 10000, Algeria
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The Antidiabetic Activities of Neocryptotanshinone: Screened by Molecular Docking and Related to the Modulation of PTP1B. Nutrients 2022; 14:nu14153031. [PMID: 35893885 PMCID: PMC9330310 DOI: 10.3390/nu14153031] [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: 07/06/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 01/27/2023] Open
Abstract
The aim of this study was to provide a practical experimental basis for the development of Neocryptotanshinone (NCTS) as an effective hypoglycemic drug and a theoretical method for the rapid screening of natural compounds with hypoglycemic effects. Molecular docking was used to screen the most suitable ligand. Hematoxylin and eosin, immunohistochemical staining, enzyme-linked immunosorbent assay and Western Blotting approved the hypoglycemic effect of NCTS. According to the free energy of binding, among 180 active compounds from the Traditional Chinese Medicine Integrated Database, NCTS was finally chose for investigation its hypoglycemic effects. In db/db mice, NCTS significantly reduced body weight and plasma glucose, improved glucose tolerance and levels of fasting plasma glucose and glycated hemoglobin A1c, and decreased insulin resistance after six-week administration. NCTS restored the pathological state in the liver of db/db mice and significantly decreased protein tyrosine phosphatase 1B (PTP1B) expression in the liver and muscle of db/db mice, which is related to the regulatory effect of NCTS on insulin receptor substrate 1. In conclusion, we successfully explored the hypoglycemic effect of NCTS in db/db mice via regulating the expression of PTP1B.
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Reverchon E, Scognamiglio M, Baldino L. The Nanostructure of Polymer-Active Principle Microparticles Produced by Supercritical CO 2 Assisted Processing. NANOMATERIALS 2022; 12:nano12091401. [PMID: 35564110 PMCID: PMC9105249 DOI: 10.3390/nano12091401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 04/13/2022] [Accepted: 04/18/2022] [Indexed: 12/22/2022]
Abstract
Traditional and supercritical CO2 assisted processes are frequently used to produce microparticles formed by a biopolymer containing an active principle to improve the bioavailability of the active principle. However, information about the internal organization of these microparticles is still scarce. In this work, a suspension of dextran + Fe3O4 nanoparticles (model system) and a solution of polyvinylpyrrolidone (PVP) + curcumin were used to produce spherical microparticles by supercritical CO2 processing. Periodic dynamic light scattering measurements were used to analyze the evolution of the microparticles dissolution, size, and size distribution of the guest active principle in the polymeric matrix. It was found that curcumin was dispersed in the form of nanoparticles in the PVP microparticles, whose size largely depended on its relative concentration. These results were validated by transmission electron microscopy and scanning electron microscopy of the PVP microparticles and curcumin nanoparticles, before and after the dissolution tests.
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Xu H, Xu X, Li S, Song WL, Yu DG, Annie Bligh SW. The Effect of Drug Heterogeneous Distributions within Core-Sheath Nanostructures on Its Sustained Release Profiles. Biomolecules 2021; 11:1330. [PMID: 34572545 PMCID: PMC8469915 DOI: 10.3390/biom11091330] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/05/2021] [Accepted: 09/07/2021] [Indexed: 12/17/2022] Open
Abstract
The sustained release of a water-soluble drug is always a key and important issue in pharmaceutics. In this study, using cellulose acetate (CA) as a biomacromolecular matrix, core-sheath nanofibers were developed for providing a sustained release of a model drug-metformin hydrochloride (MET). The core-sheath nanofibers were fabricated using modified tri-axial electrospinning, in which a detachable homemade spinneret was explored. A process-nanostructure-performance relationship was demonstrated through a series of characterizations. The prepared nanofibers F2 could release 95% of the loaded MET through a time period of 23.4 h and had no initial burst effect. The successful sustained release performances of MET can be attributed to the following factors: (1) the reasonable application of insoluble CA as the filament-forming carrier, which determined that the drug was released through a diffusion manner; (2) the core-sheath nanostructure provided the possibility of both encapsulating the drug completely and realizing the heterogeneous distributions of MET in the nanofibers with a higher drug load core than the sheath; (3) the thickness of the sheath sections were able to be exploited for further manipulating a better drug extended release performance. The mechanisms for manipulating the drug sustained release behaviors are proposed. The present proof-of-concept protocols can pave a new way to develop many novel biomolecule-based nanostructures for extending the release of water-soluble drugs.
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Affiliation(s)
- Haixia Xu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (H.X.); (X.X.); (S.L.); (W.-L.S.)
| | - Xizi Xu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (H.X.); (X.X.); (S.L.); (W.-L.S.)
| | - Siyu Li
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (H.X.); (X.X.); (S.L.); (W.-L.S.)
| | - Wen-Liang Song
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (H.X.); (X.X.); (S.L.); (W.-L.S.)
| | - Deng-Guang Yu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (H.X.); (X.X.); (S.L.); (W.-L.S.)
- Shanghai Engineering Technology Research Center for High-Performance Medical Device Materials, Shanghai 200093, China
| | - S. W. Annie Bligh
- School of Health Sciences, Caritas Institute of Higher Education, Hong Kong 999077, China
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