ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2019
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IF 4.527
Yang Wu,Yan Li,Liangqing Zheng,Pengcheng Wang,Yan liu,Yongning Wu,ZhiYong Gong
Nε-(carboxymethyl)lysine (CML) is a potentially noxious compound that is causing widespread concern due to its use in various food products. In this study, we investigated CML neurotoxicity via an in vivo experiment with mice, and an in vitro experiment using a 3D microvascular network model (with human brain vascular endothelial cell and human astrocyte) that simulated the blood-brain barrier. We found that CML could induce cell survival status variations, and histopathological changes to the brain. In addition, CML increased levels of oxidative stress , prompted the protein expression of the receptor for advanced glycation end-products (RAGE). CML up-regulated both the gene expression of RAGE, the activating protein-1 (AP-1), the inflammatory cytokines Interleukin-6 (IL-6), vascular cell adhesion molecule1 (VCAM-1), monocyte chemotactic protein1 (MCP-1). We, therefore, postulated that CML has the potential to deleteriously affect the nervous system through oxidative stress and that activation of the p38 MAPK-AP-1 signaling pathway might be implicated in this pathological process.
研究领域:
神经科学
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毒理学
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细胞生物学
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食品科学
✓ 已验证
DOI
PubMed
高影响因子
BIOMACROMOLECULES
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2021
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IF 6.988
Feihu Bi,Jin Zhang,Zengming Wei,Deshui Yu,Shuai Zheng,Jie Wang,Hongyu Li,Zan Hua,Hui Zhang,Guang Yang
A library of 14 dynamic glycopeptide amphiphilic dendrimers composed of 14 hydrophilic and bioactive saccharides (seven kinds) as dendrons and 7 hydrophobic peptides (di- and tetrapeptides) as arms with β-cyclodextrin (CD) as a core were facially designed and synthesized in several steps. Fourteen saccharides were first conjugated to the C-2 and C-3 positions of CD, forming glycodendrons. Subsequently, seven oligopeptide arms were introduced at the C-6 positions of a CD moiety by an acylhydrazone dynamic covalent bond, resulting in unique Janus amphiphilic glycopeptide dendrimers with precise and varied molecular structures. The kinds of hydrophilic parts of saccharides and hydrophobic parts of peptides were easily varied to prepare a series of amphiphilic Janus glycopeptide dendrimers. Intriguingly, these obtained amphiphilic glycopeptide dendrimers showcased very different self-assembly behaviors from the traditional amphiphilic linear block-copolymers and self-assembled into different glyco-nanostructures with controllable morphologies including glycospheres, worm-like micelles, and fibers depending upon the repeat unit ratio of saccharides and phenylalanine. Both glycodendrons and glycopeptide assemblies displayed strong and specific recognitions with C-type mannose-specific lectin. Moreover, these glycopeptide nanomaterials can encapsulate exemplary hydrophobic molecules such as Nile red (NR). The dye-loaded glycopeptide nanostructures showed a pH-controllable release behavior around the physiological and acidic tumor environment. Furthermore, cell experiments demonstrated that such glyco-nanostructures can further facilitate the functions of a model drug of the pyridone agent to reduce the expression of monocyte chemotactic protein-1 (MCP-1) and interleukin -1beta (IL-1β) in the primary peritoneal macrophages via encapsulating drugs. Considering all the abovementioned advantages including unique and precise structures, bioactivity, targeting, and controllable cargo release, we believe that these findings can not only enrich the library of glycopeptides but also provide a new avenue to the fabrication of smart and structure-controllable glyco-nanomaterials which hold great potential biological applications such as targeted delivery and release of therapeutic and bioactive molecules.
研究领域:
纳米技术
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材料科学
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生物材料
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药学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LIFE SCIENCES
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2019
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IF 3.448
Pan Chen,Hongliang Yao,Weiwei Su,Yudong He,Keling Cheng,Yonggang Wang,Wei Peng,Peibo Li
Aims Sleep deficiency has been reported to be associated with some oral health problems. Oral ulcers are very common lesions of the oral mucosa, which severely impact patients' quality of life. However, the association between sleep deficiency and the oral ulcer remains unknown. The present study aims to explore the effects of sleep deficiency on oral ulcers. Main methods Rats were divided into normal control group (n = 30) and oral ulcer group (OU group, n = 50). Model rats with phenol-induced oral ulcers were deprived of sleep for 72 h by using the modified multiple platform technique. Key findings Sleep deprivation worsened oral ulcers and delayed healing process in rats. In addition, sleep deprivation increased the γ-aminobutyric acid (GABA, P < 0.01) and 5-hydroxytryptamine (5-HT, P < 0.05) levels in serum and brain, the corticotrophin (ACTH, P < 0.05), corticosterone (CORT, P < 0.01), immunoglobulin (Ig)M ( P < 0.01), tumor necrosis factor-alpha (TNF-α) ( P < 0.01), interleukin (IL)-1β ( P < 0.01), IL-6 ( P < 0.01), IL-8 ( P < 0.01), monocyte chemoattractant protein-1 (MCP-1) ( P < 0.01), and 8-hydroxy-deoxyguanosine (8-OHdG, P < 0.01) levels in serum. Sleep deprivation also up-regulated malonaldehyde (MDA) ( P < 0.05), TNF-α ( P < 0.05), and IL-1β ( P < 0.01) levels in oral mucosa tissue and delayed superoxide dismutase (SOD, P < 0.05) activity recovery. Significance These data suggest that sleep deprivation impaired the oral ulcer healing in rat oral mucosa, and the mechanisms of this effect are probably related to neuro-immuno-endocrine system and oxidative stress.
研究领域:
神经科学
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免疫学
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内分泌学
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口腔健康
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2021
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IF 4.952
Weina Wu,Xiaoyu Ni,Ping Shao,Haiyan Gao
A new polysaccharide multilayer biodegradable film was developed and tested, which can scavenge ethylene and inhibit ethylene action by releasing 1-methylcyclopropene (1-MCP). The film was fabricated with the stacking order of hydrophobic ethyl cellulose outer layer, a mixture of 1-methylcyclopropene and palladium on carbon (1-MCP-Pd/C) middle layer and hydrophilic hydrogel inner layer. The excess water produced by fruits and vegetables was absorbed by inner layer, avoiding the accumulation of condensed water. Meanwhile, the increase of the permeability of the inner hydrogel layer caused by moisture absorption facilitated manipulation of antistaling agent. SEM, TG and DSC proved that the functional components were successfully loaded on the film. Gas chromatography analysis results demonstrated that the 1-MCP release rate and ethylene removal rate could be controlled by adjusting the humidity (50% RH to 100% RH). The effects of the film on the main quality attributes of Agaricus bisporus were evaluated at 20 °C. This prepared functional film could delay the softening, browning and weight loss of mushrooms , maintain the integrity of mushroom cell membrane, maintain ascorbic acid content and soluble solid content, and inhibit the activity of ethylene synthesis-related enzymes.
研究领域:
食品科学
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材料科学
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生物技术
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农业工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）