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Ji H, Fan Y, Long Y, Dai K, Zheng G, Jia X, Liu A, Yu J. Structural analysis of Salvia miltiorrhiza polysaccharide and its regulatory functions on T cells subsets in tumor-bearing mice combined with thymopentin. Int J Biol Macromol 2024:133832. [PMID: 39002910 DOI: 10.1016/j.ijbiomac.2024.133832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 05/18/2024] [Accepted: 07/10/2024] [Indexed: 07/15/2024]
Abstract
Salvia miltiorrhiza ethanol-extracted polysaccharide (SMEP) and thymopentin (TP5) have been proved with strong immunomodulatory activity, and T cells subsets play pivotal roles in the inhibition of solid tumors growth. In the present study, the structure of SMEP was further identified via methylation and nuclear magnetic resonance spectra, and the immunomodulatory activity in combination with TP5 was investigated via evaluating T cell subsets spatial distributions in tumor-bearing mice, finally the cellular status of solid tumor cells was analyzed. The results revealed that SMEP was a neutral heteropolysaccharide using (1 → 4)-α-D-Glcp and (2 → 1)-β-D-Fruf as the main chain, along with branched chains of (1 → 6)-α-D-Galp. The SMEP+TP5 treatments could effectively promote the differentiation and improve the specific recognition capacity of CD4+ T cells in tumor-bearing mice, thereby activate tumor-infiltrating CD8+ T cells to exert cytotoxic effects, finally promoting the tumor cells apoptosis via blocking cell cycle at G0/G1 phase, which might be relevant with suppression of Wnt/β-catenin signaling pathway. These findings highlighted the potential of SMEP as an immunoadjuvant for patients bearing immune-deficiency related diseases, and provided data support for the functional researches of T cell subsets in tumor immunity.
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Affiliation(s)
- Haiyu Ji
- College of Life Sciences, Yantai University, Yantai, Shandong 264005, China
| | - Yuting Fan
- College of Life Sciences, Yantai University, Yantai, Shandong 264005, China
| | - Yan Long
- College of Life Sciences, Yantai University, Yantai, Shandong 264005, China
| | - Keyao Dai
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Guoqiang Zheng
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Xiaoyu Jia
- Xinjiang Yuanxiang Agricultural Technology Co., Ltd., Hetian, Xinjiang 848000, China
| | - Anjun Liu
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Juan Yu
- College of Life Sciences, Yantai University, Yantai, Shandong 264005, China.
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2
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Diaz-Gonzalez J, Arriaga LG, Casanova-Moreno JR. Probing the influence of crosslinkers on the properties, response, and degradation of enzymatic hydrogels for electrochemical glucose biosensing through fluorescence analysis. RSC Adv 2024; 14:9514-9528. [PMID: 38516160 PMCID: PMC10953846 DOI: 10.1039/d4ra00265b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 03/08/2024] [Indexed: 03/23/2024] Open
Abstract
Drop-cast crosslinked hydrogels are a common platform for enzymatic electrochemical biosensors. Despite the widespread use of these complex systems, there are still several questions about how their physicochemical properties affect their performance, stability, and reproducibility. In this work, first-generation faradaic biosensors composed of glucose oxidase and branched polyethyleneimine (BPEI) are prepared using either glutaraldehyde (GA) or ethylene glycol diglycidyl ether (EGDGE) as crosslinkers. While EGDGE gels present an increasing electrochemical response with increasing crosslinker concentration, the current of GA gels decreases at high crosslinker concentration probably due to the hampered diffusion on tightly networked gels. We compared different strategies to use fluorescence microscopy to gain insight into the gel structure either by labeling the gel components with fluorophores or taking advantage of the intrinsic fluorescence of the imines formed upon crosslinking with GA. By monitoring the fluorescence of the crosslinking bonds and the electrochemical response, we demonstrate that hydrolysis, a common hydrogel degradation mechanism, is not responsible for the loss of electrical current over time in gels prepared with glutaraldehyde. Most hydrogel-based electrochemical biosensor studies do not perform specific experiments to determine the cause of the degradation and instead just infer it from the dependence of the current on the preparation conditions (most commonly concentrations). We show that, by taking advantage of several analytical techniques, it is possible to gain more knowledge about the degradation mechanisms and design better enzymatic biosensors.
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Affiliation(s)
- Jancarlo Diaz-Gonzalez
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica Pedro Escobedo Querétaro 76703 Mexico
| | - L G Arriaga
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica Pedro Escobedo Querétaro 76703 Mexico
| | - Jannu R Casanova-Moreno
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica Pedro Escobedo Querétaro 76703 Mexico
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3
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Gu X, Cheng H, Lu X, Li R, Ouyang X, Ma N, Zhang X. Plant-based Biomass/Polyvinyl Alcohol Gels for Flexible Sensors. Chem Asian J 2023; 18:e202300483. [PMID: 37553785 DOI: 10.1002/asia.202300483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/14/2023] [Indexed: 08/10/2023]
Abstract
Flexible sensors show great application potential in wearable electronics, human-computer interaction, medical health, bionic electronic skin and other fields. Compared with rigid sensors, hydrogel-based devices are more flexible and biocompatible and can easily fit the skin or be implanted into the body, making them more advantageous in the field of flexible electronics. In all designs, polyvinyl alcohol (PVA) series hydrogels exhibit high mechanical strength, excellent sensitivity and fatigue resistance, which make them promising candidates for flexible electronic sensing devices. This paper has reviewed the latest progress of PVA/plant-based biomass hydrogels in the construction of flexible sensor applications. We first briefly introduced representative plant biomass materials, including sodium alginate, phytic acid, starch, cellulose and lignin, and summarized their unique physical and chemical properties. After that, the design principles and performance indicators of hydrogel sensors are highlighted, and representative examples of PVA/plant-based biomass hydrogel applications in wearable electronics are illustrated. Finally, the future research is briefly prospected. We hope it can promote the research of novel green flexible sensors based on PVA/biomass hydrogel.
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Affiliation(s)
- Xiaochun Gu
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
- College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Haoge Cheng
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
- College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Xinyi Lu
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
- College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Rui Li
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
- College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Xiao Ouyang
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
- College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Ning Ma
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
- College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Xinyue Zhang
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China
- College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
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4
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Ji H, Fan Y, Gao X, Gong Y, Dai K, Wang Z, Xu B, Yu J. The Protective Effects of Water-Soluble Alginic Acid on the N-Terminal of Thymopentin. Molecules 2023; 28:6445. [PMID: 37764221 PMCID: PMC10536172 DOI: 10.3390/molecules28186445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/30/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Thymopentin (TP5) has exhibited strong antitumor and immunomodulatory effects in vivo. However, the polypeptide is rapidly degraded by protease and aminopeptidase within a minute at the N-terminal of TP5, resulting in severe limitations for further practical applications. In this study, the protective effects of water-soluble alginic acid (WSAA) on the N-terminal of TP5 were investigated by establishing an H22 tumor-bearing mice model and determining thymus, spleen, and liver indices, immune cells activities, TNF-α, IFN-γ, IL-2, and IL-4 levels, and cell cycle distributions. The results demonstrated that WSAA+TP5 groups exhibited the obvious advantages of the individual treatments and showed superior antitumor effects on H22 tumor-bearing mice by effectively protecting the immune organs, activating CD4+ T cells and CD19+ B cells, and promoting immune-related cytokines secretions, finally resulting in the high apoptotic rates of H22 cells through arresting them in S phase. These data suggest that WSAA could effectively protect the N-terminal of TP5, thereby improving its antitumor and immunoregulatory activities, which indicates that WSAA has the potential to be applied in patients bearing cancer or immune deficiency diseases as a novel immunologic adjuvant.
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Affiliation(s)
- Haiyu Ji
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China; (H.J.); (Y.F.); (X.G.); (Y.G.); (Z.W.); (B.X.)
| | - Yuting Fan
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China; (H.J.); (Y.F.); (X.G.); (Y.G.); (Z.W.); (B.X.)
| | - Xiaoji Gao
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China; (H.J.); (Y.F.); (X.G.); (Y.G.); (Z.W.); (B.X.)
| | - Youshun Gong
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China; (H.J.); (Y.F.); (X.G.); (Y.G.); (Z.W.); (B.X.)
| | - Keyao Dai
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China;
| | - Zhenhua Wang
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China; (H.J.); (Y.F.); (X.G.); (Y.G.); (Z.W.); (B.X.)
| | - Bo Xu
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China; (H.J.); (Y.F.); (X.G.); (Y.G.); (Z.W.); (B.X.)
| | - Juan Yu
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China; (H.J.); (Y.F.); (X.G.); (Y.G.); (Z.W.); (B.X.)
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Marin L, Andreica BI, Anisiei A, Cibotaru S, Bardosova M, Materon EM, Oliveira ON. Quaternized chitosan (nano)fibers: A journey from preparation to high performance applications. Int J Biol Macromol 2023:125136. [PMID: 37270121 DOI: 10.1016/j.ijbiomac.2023.125136] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/09/2023] [Accepted: 05/26/2023] [Indexed: 06/05/2023]
Abstract
The industrial production of chitosan, initiated over 50 years ago, has transformed its application across diverse industries, agriculture, and medicine. To enhance its properties, numerous chitosan derivatives have been synthesized. The quaternization of chitosan has proven beneficial, as it not only enhances its properties but also imparts water solubility, expanding its potential for a wider range of applications. Specifically, the utilization of quaternized chitosan-based nanofibers has leveraged the synergistic benefits of quaternized chitosan (including hydrophilicity, bioadhesiveness, antimicrobial, antioxidant, hemostatic, and antiviral activities, as well as ionic conductivity) in combination with the distinctive characteristics of nanofibers (such as a high aspect ratio and 3D architecture). This combination has permitted numerous possibilities, spanning from wound dressings, air and water filters, drug delivery scaffolds, antimicrobial textiles, to energy storage systems and alkaline fuel cells. In this comprehensive review, we examine the preparation methods, properties, and applications of various composite fibers containing quaternized chitosan. The advantages and disadvantages of each method and composition are meticulously summarized, while relevant diagrams and figures illustrate the key findings.
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Affiliation(s)
- Luminita Marin
- "Petru Poni" Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley, 41A, Iasi, Romania.
| | - Bianca-Iustina Andreica
- "Petru Poni" Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley, 41A, Iasi, Romania
| | - Alexandru Anisiei
- "Petru Poni" Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley, 41A, Iasi, Romania
| | - Sandu Cibotaru
- "Petru Poni" Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley, 41A, Iasi, Romania
| | - Maria Bardosova
- Slovak Academy of Science, Institute of Informatics, Bratislava, Slovakia
| | - Elsa M Materon
- Instituto de Física de São Carlos, Universidade de São Paulo, PO Box 369, 13560-970 São Carlos, Brazil
| | - Osvaldo N Oliveira
- Instituto de Física de São Carlos, Universidade de São Paulo, PO Box 369, 13560-970 São Carlos, Brazil
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6
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Kong S, Song J, Wang Y, Wang S, Su F, Li S. Human umbilical cord blood mononuclear cells laden hydrogels made from carboxymethyl chitosan and oxidized hyaluronic acid for wound healing. J Appl Polym Sci 2023. [DOI: 10.1002/app.53848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2023]
Affiliation(s)
- Shaowen Kong
- College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Jie Song
- College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Yuandou Wang
- College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Shuxin Wang
- College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Feng Su
- College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
- Institute of High Performance Polymers Qingdao University of Science and Technology Qingdao China
| | - Suming Li
- Institut Européen des Membranes, IEM UMR 5635 Université Montpellier, CNRS, ENSCM Montpellier France
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7
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Cibotaru S, Nicolescu A, Marin L. Dynamic PEGylated phenothiazine imines; synthesis, photophysical behavior and reversible luminescence switching in response to external stimuli. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114282] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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8
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Pogostin BH, Saenz G, Cole CC, Euliano EM, Hartgerink JD, McHugh KJ. Dynamic Imine Bonding Facilitates Mannan Release from a Nanofibrous Peptide Hydrogel. Bioconjug Chem 2023; 34:193-203. [PMID: 36580277 PMCID: PMC10061233 DOI: 10.1021/acs.bioconjchem.2c00461] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Recently, there has been increased interest in using mannan as an immunomodulatory bioconjugate. Despite notable immunological and functional differences between the reduced (R-Man) and oxidized (O-Man) forms of mannan, little is known about the impact of mannan oxidation state on its in vivo persistence or its potential controlled release from biomaterials that may improve immunotherapeutic or prophylactic efficacy. Here, we investigate the impact of oxidation state on the in vitro and in vivo release of mannan from a biocompatible and immunostimulatory multidomain peptide hydrogel, K2(SL)6K2 (abbreviated as K2), that has been previously used for the controlled release of protein and small molecule payloads. We observed that O-Man released more slowly from K2 hydrogels in vitro than R-Man. In vivo, the clearance of O-Man from K2 hydrogels was slower than O-Man alone. We attributed the slower release rate to the formation of dynamic imine bonds between reactive aldehyde groups on O-Man and the lysine residues on K2. This imine interaction was also observed to improve K2 + O-Man hydrogel strength and shear recovery without significantly influencing secondary structure or peptide nanofiber formation. There were no observed differences in the in vivo release rates of O-Man loaded in K2, R-Man loaded in K2, and R-Man alone. These data suggest that, after subcutaneous injection, R-Man naturally persists longer in vivo than O-Man and minimally interacts with the peptide hydrogel. These results highlight a potentially critical, but previously unreported, difference in the in vivo behavior of O-Man and R-Man and demonstrate that K2 can be used to normalize the release of O-Man to that of R-Man. Further, since K2 itself is an adjuvant, a combination of O-Man and K2 could be used to enhance the immunostimulatory effects of O-Man for applications such as infectious disease vaccines and cancer immunotherapy.
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Affiliation(s)
- Brett H Pogostin
- Department of Bioengineering, Rice University, Houston, Texas77005, United States
| | - Gabriel Saenz
- Department of Chemistry, Rice University, Houston, Texas77005, United States
| | - Carson C Cole
- Department of Chemistry, Rice University, Houston, Texas77005, United States
| | - Erin M Euliano
- Department of Bioengineering, Rice University, Houston, Texas77005, United States
| | - Jeffrey D Hartgerink
- Department of Bioengineering, Rice University, Houston, Texas77005, United States
- Department of Chemistry, Rice University, Houston, Texas77005, United States
| | - Kevin J McHugh
- Department of Bioengineering, Rice University, Houston, Texas77005, United States
- Department of Chemistry, Rice University, Houston, Texas77005, United States
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Wang Q, Wang Z, Zhang D, Gu J, Ma Y, Zhang Y, Chen J. Circular Patterns of Dynamic Covalent Hydrogels with Gradient Stiffness for Screening of the Stem Cell Microenvironment. ACS APPLIED MATERIALS & INTERFACES 2022; 14:47461-47471. [PMID: 36240467 DOI: 10.1021/acsami.2c14924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
As extracellular matrix (ECM) mimetic materials, hydrogels have been widely used for broad biomedical applications. However, with so many physical or chemical cues in the matrix that regulate cell behaviors or functions, it remains challenging to design a customizable hydrogel with the desired properties on demand. In the current study, we aim to establish a circular-patterned hydrogel model with gradient stiffness for screening the most favorable ECM environment for specific cells or certain application purposes. First, six types of hydrogels with a wide stiffness range of 1.2-28.9 kPa were prepared by dynamic covalent cross-linking between gelatin derivatives and oxidized hyaluronic acid. Taking advantage of their instantaneous self-healing property from dynamic chemistry, the hydrogels were further spliced into one whole piece of circular-patterned hydrogel. When rabbit bone marrow mesenchymal stem cells were seeded in the center, the influences of matrix stiffness on the regulation of stem cell adhesion, migration, and differentiation were directly observed and compared under one visual field. In addition, these hydrogels all possessed good biocompatibility, degradability, and injectability, showing great potential for tissue-engineering-related applications.
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Affiliation(s)
- Qimeng Wang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Ziyan Wang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Difei Zhang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Jieyu Gu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Yongxin Ma
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Yan Zhang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Jinghua Chen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, P. R. China
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Craciun AM, Morariu S, Marin L. Self-Healing Chitosan Hydrogels: Preparation and Rheological Characterization. Polymers (Basel) 2022; 14:polym14132570. [PMID: 35808616 PMCID: PMC9268889 DOI: 10.3390/polym14132570] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/17/2022] [Accepted: 06/21/2022] [Indexed: 12/16/2022] Open
Abstract
The paper aims at the preparation of chitosan self-healing hydrogels, designed as carriers for local drug delivery by parenteral administration. To this aim, 30 hydrogels were prepared using chitosan and pyridoxal 5-phosphate (P5P), the active form of vitamin B6 as precursors, by varying the ratio of glucosamine units and aldehyde on the one hand and the water content on the other hand. The driving forces of hydrogelation were investigated by nuclear magnetic resonance (NMR), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction, and polarized light microscopy (POM) measurements. NMR technique was also used to investigate the stability of hydrogels over time, and their morphological particularities were assessed by scanning electron microscopy (SEM). Degradability of the hydrogels was studied in media of four different pH, and preliminary self-healing ability was visually established by injection through a syringe needle. In-depth rheological investigation was conducted in order to monitor the storage and loss moduli, linear viscoelastic regime, and structural recovery capacity. It was concluded that chitosan crosslinking with pyridoxal 5-phosphate is a suitable route to reach self-healing hydrogels with a good balance of mechanical properties/structural recovery, good stability over time, and degradability controlled by pH.
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Luo R, Wan Y, Luo X, Liu G, Li Z, Chen J, Su D, Lu N, Luo Z. A Rapid Self-Assembly Peptide Hydrogel for Recruitment and Activation of Immune Cells. Molecules 2022; 27:molecules27020419. [PMID: 35056735 PMCID: PMC8779634 DOI: 10.3390/molecules27020419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 12/22/2021] [Accepted: 01/04/2022] [Indexed: 12/17/2022] Open
Abstract
Self-assembly peptide nanotechnology has attracted much attention due to its regular and orderly structure and diverse functions. Most of the existing self-assembly peptides can form aggregates with specific structures only under specific conditions and their assembly time is relatively long. They have good biocompatibility but no immunogenicity. To optimize it, a self-assembly peptide named DRF3 was designed. It contains a hydrophilic and hydrophobic surface, using two N-terminal arginines, leucine, and two c-terminal aspartate and glutamic acid. Meanwhile, the c-terminal of the peptide was amidated, so that peptide segments were interconnected to increase diversity. Its characterization, biocompatibility, controlled release effect on antigen, immune cell recruitment ability, and antitumor properties were examined here. Congo red/aniline blue staining revealed that peptide hydrogel DRF3 could be immediately gelled in PBS. The stable β-sheet secondary structure of DRF3 was confirmed by circular dichroism spectrum and IR spectra. The observation results of cryo-scanning electron microscopy, transmission electron microscopy, and atomic force microscopy demonstrated that DRF3 formed nanotubule-like and vesicular structures in PBS, and these structures interlaced with each other to form ordered three-dimensional nanofiber structures. Meanwhile, DRF3 showed excellent biocompatibility, could sustainably and slowly release antigens, recruit dendritic cells and promote the maturation of dendritic cells (DCs) in vitro. In addition, DRF3 has a strong inhibitory effect on clear renal cell carcinoma (786-0). These results provide a reliable basis for the application of peptide hydrogels in biomedical and preclinical trials.
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