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Luo R, Wan Y, Liu G, Chen J, Luo X, Li Z, Su D, Lu N, Luo Z. Engineering Self-Assembling Peptide Hydrogel to Enhance the Capacity of Dendritic Cells to Activate In Vivo T-Cell Immunity. Biomacromolecules 2024; 25:1408-1428. [PMID: 38236703 DOI: 10.1021/acs.biomac.3c00511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
The efficacy of the dendritic cell (DC) has failed to meet expectations thus far, and crucial problems such as the immature state of DCs, low targeting efficiency, insufficient number of dendritic cells, and microenvironment are still the current focus. To address these problems, we developed two self-assembling peptides, RLDI and RQDT, that mimic extracellular matrix (ECM). These peptides can be self-assembled into highly ordered three-dimensional nanofiber scaffold structures, where RLDI can form gelation immediately. In addition, we found that RLDI and RQDT enhance the biological function of DCs, including releasing antigens sustainably, adhering to DCs, promoting the maturation of DCs, and increasing the ability of DC antigen presentation. Moreover, peptide hydrogel-based DC treatment significantly achieved prophylactic and treatment effects on colon cancer. These results have certain implications for the design of new broad-spectrum vaccines in the future.
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Affiliation(s)
- Ruyue Luo
- College of Basic Medical Sciences, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, China
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, United States
| | - Yuan Wan
- College of Basic Medical Sciences, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, China
- Roy J. Carver Department of Biomedical Engineering, College of Engineering, University of Iowa, Iowa City, Iowa 52242, United States
| | - Guicen Liu
- College of Basic Medical Sciences, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, China
| | - Jialei Chen
- College of Basic Medical Sciences, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, China
| | - Xinyi Luo
- College of Basic Medical Sciences, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, China
| | - Zhaoxu Li
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - Di Su
- College of Basic Medical Sciences, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, China
| | - Na Lu
- College of Basic Medical Sciences, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, China
| | - Zhongli Luo
- College of Basic Medical Sciences, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, China
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Li R, She Z, Zeng F, Wu S. Visualization detection of mycotoxin patulin in fruit juices by a small-molecule fluorescent probe. Analyst 2023; 148:5416-5421. [PMID: 37791608 DOI: 10.1039/d3an01404e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
The mycotoxin patulin is a common contaminant in rotten fruits, posing severe food safety risks and threats to human health. Developing a convenient, sensitive and reliable method for patulin detection is of utmost importance but remains challenging. In this study, we have successfully designed and synthesized a small-molecule fluorescent probe, FITC-Lys, which demonstrates good sensitivity in detecting patulin. Upon contact with patulin, the terminal Lys group of the FITC-Lys probe reacts with patulin, resulting in the formation of the fluorescein dimer that subsequently quenches fluorescence. This variation of fluorescence enables the visualization and sensitive detection of patulin. The probe exhibits good sensitivity with a low LOD of 8 ng mL-1 for the fluorescence spectrum method and a LOD of 12 ng mL-1 for the fluorescence imaging method. Moreover, we have validated the probe's capability for patulin detection in apple and pear juices, achieving good recoveries ranging from 98.60% to 103.80%. Notably, the probe FITC-Lys is the first small-molecule fluorescent probe that has proven successful in visualizing patulin in juices derived from decayed apples and pears. Consequently, this probe holds great potential as a practical tool for monitoring patulin in foodstuffs, thereby contributing to enhanced food safety standards.
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Affiliation(s)
- Rong Li
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Zunpan She
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Fang Zeng
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Shuizhu Wu
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
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Possible Reaction Mechanisms Involved in Degradation of Patulin by Heat-Assisted Cysteine under Highly Acidic Conditions. Toxins (Basel) 2022; 14:toxins14100695. [PMID: 36287964 PMCID: PMC9610101 DOI: 10.3390/toxins14100695] [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: 07/04/2022] [Revised: 09/12/2022] [Accepted: 10/08/2022] [Indexed: 11/17/2022] Open
Abstract
Patulin (PAT) is one of mycotoxins that usually contaminates apple juice, and it is not easily detoxified by cysteine (CYS) at room temperature due to the highly acidic conditions based on the Michael addition reaction. However, it could be effectively degraded by a heating treatment at 120 °C for 30 min in the presence of cysteine. In our study, a total of eight degradation products (DP A–H) were characterized and identified via liquid chromatography quadrupole time-of-flight mass spectrometry (LC-Q-TOF-MS) in a negative ion mode, and their structures and formulas were proposed based on their accurate mass data. The fragmentation patterns of PAT and its degradation products were obtained from the MS/MS analysis. Meanwhile, the possible reaction mechanisms involved in the degradation of PAT were established and explained for the first time. According to the relation between the structure and toxicity of PAT, it could be deduced that the toxic effects of PAT degradation products were potentially much less than those of PAT-self.
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Ma K, Zhang H, Diao E, Qian S, Xie P, Mao R, Huwei S, Zhang L. Cysteine‐enhanced ultrasound degradation of patulin in acidic solution simulated
pH
of apple juice. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kun Ma
- College of Food Scien ce & Engineering Shandong Agricultural University, Tai’an, 271018 PR China
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection Huaiyin Normal University Huai’an, 223300 PR China
| | - Hui Zhang
- College of Food Scien ce & Engineering Shandong Agricultural University, Tai’an, 271018 PR China
| | - Enjie Diao
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection Huaiyin Normal University Huai’an, 223300 PR China
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation Huaiyin Normal University Huai’an, 223300 PR China
| | - Shiquan Qian
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection Huaiyin Normal University Huai’an, 223300 PR China
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation Huaiyin Normal University Huai’an, 223300 PR China
| | - Peng Xie
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection Huaiyin Normal University Huai’an, 223300 PR China
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation Huaiyin Normal University Huai’an, 223300 PR China
| | - Ruifeng Mao
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection Huaiyin Normal University Huai’an, 223300 PR China
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation Huaiyin Normal University Huai’an, 223300 PR China
| | - Song Huwei
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection Huaiyin Normal University Huai’an, 223300 PR China
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation Huaiyin Normal University Huai’an, 223300 PR China
| | - Liming Zhang
- Research & Development Center of National Vegetable Processing Technology Liming Food Group Co., Ltd., Pizhou, 221354 Jiangsu PR China
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