BURNS
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2024
·
IF 3.2
Meiyue Yang,Zhibo Yang,Xiangjun Huang,Xiaoping Li,Fangqin Chou,Shuiqing Zeng
The aim of this study was to explore the effect and mechanism of formononetin (FMNT) in thermal-injured fibroblast proliferation, apoptosis, and oxidative stress. After the thermal injury, HSF cells showed inhibited proliferation, migration, and ECM synthesis, whereas increased apoptosis, ROS production, and inflammation. Specifically, after thermal injury, cell viability, migration distance, and protein levels of Collage I, Collage III, α-SMA, MMP1, and MMP3 were reduced; cell apoptosis rate and TUNEL-positive cell numbers were increased; the levels of Bax and Cleaved caspase-3 showed to be elevated, while Bcl-2 level showed to be reduced. Moreover, the thermal injured-HSF cells showed increased levels of ROS, MDA, LDH, TNF-α, and IL-1β, and decreased GSH, SOD, GSH-Px, and CAT. FMNT levels can partially eliminate the effects of thermal injury on HSF cells, as shown by promoting thermal injured-HSF cell proliferation and migration, and inhibiting cell apoptosis, ROS production, and inflammation. FMNT exerted no significant effect on normal HSF cells. Additionally, the level of the P13K/AKT/mTOR signaling-related proteins (p-P13K, p-AKT, and p-mTOR) was reduced in thermal injured-HSF cells, whereas FMNT could promote p-P13K, p-AKT, and p-mTOR levels. FMNT can partially alleviate the thermal injury-induced inhibition of fibroblast proliferation and migration; FMNT also inhibited the apoptosis, ROS level, and inflammation in thermal-injured cells. The effects of FMNT may be mediated by regulating the P13K/AKT/mTOR pathway.
研究领域:
药理学
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细胞生物学
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伤口愈合
✓ 已验证
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2023
·Vol. 12
·期 21
·2300075
·
IF 10
Lu Zheng,Xiaoyun Li,Changliang Xu,Yidi Xu,Yukai Zeng,Manseng Tam,Huan-Tian Zhang,Xiaoying Wang
Chitin is a popular hemostatic material, but there are still many deficiencies in its ability to effectively stop bleeding, prevent infection, and fit wounds. Herein, AgNP@zeolite/chitin/bamboo (AgZ-CB) composite sponges with shape recovery are prepared to minimize blood loss, kill bacteria, and promote wound healing. Notably, the bamboo powder is used for the first time to remarkably enhance the softness of the composite sponge (volumetric expansion ratio >5). The fabricated AgZ-CB sponge exhibits an excellent killing effect (≈100% bactericidal rate) against both Escherichia coli and Staphylococcus aureus and activates internal and external coagulation pathways to accelerate hemostasis without causing thermal damage (≈5 °C temperature difference). Moreover, the AgZ-CB sponge shows less blood loss (26 mg) and a shorter time to hemostasis (42 s) than the commercial polyvinyl formal sponge (84 mg and 76 s) in the full-thickness liver injury model. The in vivo wound healing and biodegradation experiment indicate that AgZ-CB with excellent biocompatibility can close wounds efficiently. Overall, the AgZ-CB sponge has great potential in combating a series of obstacles in wound healing.
研究领域:
材料科学
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生物医学工程
·
伤口护理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Today
·
2024
·
IF 13.2
Fanqiang Bu,Mengnan Liu,Wangtao Zhao,Fang Liu,Wensheng Xie,Guofeng Li,Xing Wang
Combating bacterial biofilm poses a significant challenge because of the dense extracellular polymeric substance (EPS) barrier and inherent drug tolerance. Herein, the designed core-shell nanoparticles (DA 3 -NPs) that eradicate biofilm by precise in-situ phototherapy are reported. DA 3 -NPs are self-assembled using thermosensitive azo-polymers (AP 3 ) to encapsulate GSH-degradable phototherapeutic polymers (DBP) via charge interaction. Notably, D -aminoalanine grafted onto the AP 3 serves as a critical component, providing an electroneutral shell and bacterial peptidoglycan targeting ability to the DA 3 -NPs. Consequently, DA 3 -NPs effectively penetrate EPS up to a depth of 60 µm and precisely target the bacteria within the biofilms. Upon exposure to laser irradiation and the GSH microenvironment, DA 3 -NPs undergo sequential responses involving shell detachment and core disintegration. These processes facilitate point-to-point bacterial killing through the in-situ generations of ROS, carbon radicals and heat damage to the internal bacteria. Compared to non-targeted nanoparticles, DA 3 -NPs exhibit a 61-fold increase in biofilm removal efficiency. This study thus presents a precise in-situ phototherapy strategy for nonantibiotic treatment of biofilm infections.
研究领域:
纳米技术
·
生物医学工程
·
微生物学
·
药学
✓ 已验证
DOI
高影响因子
Small
·
2024
·
IF 13
Jiayi Li,Kaifan Zheng,Luping Lin,Mengdi Zhang,Ziqi Zhang,Junyu Chen,Shaoguang Li,Hong Yao,Ailin Liu,Xinhua Lin,Gang Liu,Bing Chen
Cancer immunotherapy offers significant clinical benefits for patients with advanced or metastatic tumors. However, immunotherapeutic efficacy is often hindered by the tumor microenvironment's high redox levels, leading to variable patient outcomes. Herein, a therapeutic liposomal gold nanocage (MGL) is innovatively developed based on photo-triggered hyperthermia and a releasable strategy by combining a glutathione (GSH) depletion to remodel the tumor immune microenvironment, fostering a more robust anti-tumor immune response. MGL comprises a thermosensitive liposome shell and a gold nanocage core loaded with maleimide. The flexible shell promotes efficient uptake by cancer cells, enabling targeted destruction through photothermal therapy while triggering immunogenic cell death and the maturation of antigen-presenting cells. The photoactivated release of maleimide depletes intracellular GSH, increasing tumor cell sensitivity to oxidative stress and thermal damage. Conversely, GSH reduction also diminishes immunosuppressive cell activity, enhances antigen presentation, and activates T cells. Moreover, photothermal immunotherapy decreases elevated levels of heat shock proteins in tumor cells, further increasing their sensitivity to hyperthermia. In summary, MGL elicited a robust systemic antitumor immune response through GSH depletion, facilitating an effective photothermal immunotherapeutic strategy that reprograms the tumor microenvironment and significantly inhibits primary and metastatic tumors. This approach demonstrates considerable translational potential and clinical applicability.
研究领域:
癌症免疫治疗
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纳米技术
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生物医学工程
·
药学
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免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Bin Zheng,Yanan Xu,Mengqian Huang,Xianhuang Li,Tao Wang,Dong Ming
Microbial-based cancer therapy is nowadays considered as an interesting approach, especially with viruses which are attracting more attention owing to their simple structure and nanoscale. However, because of the need for cumbersome genetic modification and poor biosafety, its application is seriously limited. Here, nonpathogenic natural Sendai viruses (SEVs) are used as an alternative immune agonist after being mineralized by calcium ions. Both in vitro and in vivo studies indicated that virus-inorganic hybrids can effectively excite antigen-presenting cells (APCs). Then, the tumor antigens were released in large amounts by photothermal damage. Meanwhile, these released antigens were presented to lymph nodes to mature antitumor T lymphocytes via the peritumoral APCs previously recruited by the SEV. Our results demonstrated that even after administration at one point, the nanohybrids could still effectively stimulate systemic antitumor immune response to suppress the potential cancer metastatic spread. The bio-inorganic hybrid nongenetically modified virus-inorganic nanocomposites might serve as an alternative strategy for synergistic immune therapy.
研究领域:
癌症治疗
·
免疫学
·
纳米技术
·
病毒学
✓ 已验证
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2023
·
IF 7.4
Tao Liu,Naisheng Guo,Xin Jin,Yiqiu Tan,Zhanping You,Shichao Cui,Zhaoyang Chu,Chenze Fang
Phase change materials (PCMs) can regulate asphalt temperature through thermal storage properties to prevent thermal damage in asphalt pavements. However, the effects of PCMs on the thermoregulation and rheological properties of asphalt require further study. In this study, polyurethane solid–solid phase change materials (PUSSPCMs) were prepared to impart thermoregulation properties to asphalt, and the effects of PUSSPCMs on the rheological properties and microscopic characterization of asphalt were investigated. The PUSSPCMs were produced by different soft segment mass fractions (70 %, 80 %, and 90 %), and they were used to prepare modified asphalt with varying contents (3 %, 5 %, and 7 %). Thermoregulation testing system, dynamic shear rheology (DSR), bending beam rheology (BBR) tests, differential scanning calorimetry (DSC), infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and atomic force microscopy (AFM) were conducted to determine the thermoregulation, rheological properties, and modification mechanism of PUSSPCM-modified asphalt, respectively. The results show that the thermoregulation property of PUSSPCM-modified asphalt improves with the increase of soft segment mass fraction and content, 7 % P90 asphalt exhibits the best thermoregulation property with the excellent delayed time (1105 s) and temperature difference (7.1 ℃). The high-temperature rutting resistance of the modified asphalt is enhanced by decreasing the soft segment mass fraction and increasing the content of PUSSPCMs, with the 7 % P70 being the best asphalt type. The 7 % P90 asphalt exhibits the optimum low-temperature creep performance due to a higher soft segment mass fraction. The modified asphalt may be a physical modification since no new characteristic peaks appear. With the increase of soft segment mass fraction, the PUSSPCMs in asphalt transform from elastomer to a ribbon-like structure. Furthermore, the microscopic roughness ( S q ) and Young's modulus of the modified asphalt decline with the increase in soft segment mass fraction and content of PUSSPCMs, implying an increase in microscopic crack resistance and a decrease in elasticity.
研究领域:
土木工程
·
材料科学
·
化学工程
✓ 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）