Nano Research
·
2023
·
IF 9.9
Xing Chenyu,Chen Gaoyu,Zhu Xia,An Jiakun,Bao Jianchun,Wang Xuan,Zhou Xiuqing,Du Xiuli,Xu Xiangxing
Carbon dots (CDs) have wide application potentials in optoelectronic devices, biology, medicine, chemical sensors, and quantum techniques due to their excellent fluorescent properties. However, synthesis of CDs with controllable spectrum is challenging because of the diversity of the CD components and structures. In this report, machine learning (ML) algorithms were applied to help the synthesis of CDs with predictable photoluminescence (PL) under the excitation wavelengths of 365 and 532 nm. The combination of precursors was used as the variable. The PL peaks of the strongest intensity ( λ s ) and the longest wavelength ( λ l ) were used as target functions. Among six investigated ML models, the random forest (RF) model showed outstanding performance in the prediction of the PL peaks.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-15
·
IF 16.6
Yao Guang,Mo Xiaoyi,Liu Shanshan,Wang Qian,Xie Maowen,Lou Wenhao,Chen Shiyan,Pan Taisong,Chen Ke,Yao Dezhong,Lin Yuan
The cornea is a tissue susceptible to various injuries and traumas with a complicated cascade repair process, in which conserving its integrity and clarity is critical to restoring visual function. Enhancing the endogenous electric field is recognized as an effective method of accelerating corneal injury repair. However, current equipment limitations and implementation complexities hinder its widespread adoption. Here, we propose a snowflake-inspired, blink-driven flexible piezoelectric contact lens that can convert mechanical blink motions into a unidirectional pulsed electric field for direct application to moderate corneal injury repair. The device is validated on mouse and rabbit models with different relative corneal alkali burn ratios to modulate the microenvironment, alleviate stromal fibrosis, promote orderly epithelial arrangement and differentiation, and restore corneal clarity. Within an 8-day intervention, the corneal clarity of mice and rabbits improves by more than 50%, and the repair rate of mouse and rabbit corneas increases by over 52%. Mechanistically, the device intervention is advantageous in blocking growth factors’ signaling pathways specifically involved in stromal fibrosis whilst preserving and harnessing the signaling pathways required for indispensable epithelial metabolism. This work put forward an efficient and orderly corneal therapeutic technology utilizing artificial endogenous-strengthened signals generated by spontaneous body activities.
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PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2023
·Vol. 52
·期 9
·5964-5974
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IF 2.1
Zhou Xuebin,Ying Zhihua,He Xingxin,Zhang Chenhan,Zheng Xiaolong,Zheng Peng
Cellulose nanofiber (CNF), a natural polymer material with a high specific surface area, is a potential candidate for gas sensors. Here, we report Au/SnO 2 composites with excellent performance synthesized by a chemical precipitation method based on CNF-assisted synthesis, and a series of Au/SnO 2 composites were prepared by adjusting the Au content. The sensitivity of the 1.5 wt.% Au/SnO 2 sensor to a low concentration of 1 ppm NO 2 was 53, nearly 17 times higher than that of pure SnO 2 synthesized by CNF, under ultraviolet (UV) irradiation at a wavelength of 365 nm. The crystal structure of the composite was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), revealing that the composites had high crystallinity and particles reaching the nanoscale. Further experimental data showed that the CNF-assisted synthesis Au/SnO 2 sensors had good selectivity, repeatability, and stability. Additionally, the sensor is able to maintain its excellent gas sensing performance even under varying humidity conditions.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2023
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IF 5.3
Zhang Yongjie,Lin Zichun,Li Xiaopei,Li Guangdong
Vitrimer uniquely simultaneously combines the opposed thermoset-like properties (mechanical properties, durability, creep/solvent resistance) and thermoplastic-like properties (reshapability, recyclability), thus arousing great enthusiasms in the design, preparation and characterization of vitrimer. From a practical point of view, it is of great value to develop one-step and scalable synthetic procedures for high performance vitrimers. Starting from two highly available and non-expensive commodity materials, namely, ethylene acrylic acid copolymer (EAA) and triglycidyl isocyanurate (TGIC), a series of EAA-TGIC vitrimer materials with varying cross-linking degrees were prepared via a one-step, scalable and practical synthetic approach. Under mild melt compounding conditions, ring-opening of epoxy groups towards carboxyl groups in EAA occurred, resulting in cross-linking of EAA by dynamic β-hydroxyl ester covalent bonds. The formation of covalent cross-linking network in EAA-based vitrimer materials was proved by FTIR and swelling test. The thermo-mechanical, tensile, reprocessing and thermal properties of EAA-TGIC vitrimer were systematically studied. The results showed that EAA-TGIC vitrimer with high gel contents, and thus, excellent solvent resistances, were achieved. Tensile tests revealed that EAA-TGIC vitrimers exhibited premium mechanical properties with well-balanced rigidity and toughness and that the mechanical properties of recovered EAA-TGIC vitrimer remained almost unchanged compared to those of as-prepared EAA-TGIC vitrimer. This study offers a long sought-after solution for the cost-effective recycling of cross-linked polyethylenes and provides new possibilities for keeping difficult-to-recycle cross-linked polyethylenes in the circular loop.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 9
·1-8
·
IF 5.7
Zhu Zhongjie,Zhang Yu,Xue Jinxia,Kong Jing,Huang Ling,Ouyang Hui,Fu Zhifeng,He Yong
As a front-line chemotherapeutic drug for maintenance and consolidation therapy, methotrexate (MTX) has widely been applied to treat various tumors and some inflammatory diseases. However, because of its severe toxicity ascribed to low selectivity, it is necessary to monitor therapeutic drugs in high-dose MTX therapeutic regimens to ensure treatment safety. In this work, we developed a fluorescent immunochromatographic test strip (FITS) for monitoring MTX by employing time-resolved fluorescent microspheres as signal probes. With a competitive immunoassay mode, the FITS for MTX shows a super-wide dynamic range of 10 pM–10 μM, covering the entire clinical therapeutic concentration range of MTX. Therapeutic drug monitoring of MTX can be achieved within 7 min with high specificity, facilitating the timely rescue of drug poisoning led by high-dose MTX treatment. The method was employed for monitoring MTX in the spiked human serum, urine, and milk, showing acceptable recoveries ranging from 94.0 to 110.0%. The established FITS has been applied to MTX detection in serum obtained from high-dose MTX treatment. The results from FITS and enzyme multiplied immunoassay technique showed no significant difference, suggesting its reliability for usage in real biological samples. The device shows promise in point-of-care therapeutic drug monitoring for resource-limited countries and institutes, which significantly facilitates overcoming the lag time between sampling and results. Graphical abstract
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-13
·
IF 16.6
Zhu Jiexin,Li Jiantao,Lu Ruihu,Yu Ruohan,Zhao Shiyong,Li Chengbo,Lv Lei,Xia Lixue,Chen Xingbao,Cai Wenwei,Meng Jiashen,Zhang Wei,Pan Xuelei,Hong Xufeng,Dai Yuhang,Mao Yu,Li Jiong,Zhou Liang,He Guanjie,Pang Quanquan,Zhao Yan,Xia Chuan,Wang Ziyun,Dai Liming,Mai Liqiang
Electrochemical conversion of CO 2 to formic acid using Bismuth catalysts is one the most promising pathways for industrialization. However, it is still difficult to achieve high formic acid production at wide voltage intervals and industrial current densities because the Bi catalysts are often poisoned by oxygenated species. Herein, we report a Bi 3 S 2 nanowire-ascorbic acid hybrid catalyst that simultaneously improves formic acid selectivity, activity, and stability at high applied voltages. Specifically, a more than 95% faraday efficiency was achieved for the formate formation over a wide potential range above 1.0 V and at ampere-level current densities. The observed excellent catalytic performance was attributable to a unique reconstruction mechanism to form more defective sites while the ascorbic acid layer further stabilized the defective sites by trapping the poisoning hydroxyl groups. When used in an all-solid-state reactor system, the newly developed catalyst achieved efficient production of pure formic acid over 120 hours at 50 mA cm –2 (200 mA cell current).
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JOURNAL OF BIOMEDICAL SCIENCE
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2023
·Vol. 30
·期 1
·1-19
·
IF 11
Li Peisi,Zhou Dawang,Chen Dongwen,Cheng Yikan,Chen Yuan,Lin Zhensen,Zhang Xi,Huang Zhihong,Cai Jiawei,Huang Wenfeng,Lin Yanyun,Ke Haoxian,Long Jiahui,Zou Yifeng,Ye Shubiao,Lan Ping
Background A large proportion of the patients with cancer do not respond to immunotherapies. Recent studies suggested an important role for tumor-infiltrating cytotoxic T lymphocytes (CTL) in enhancing response to immunotherapy. Here, we aim to identify gene that induce proliferative and cytotoxic states of CD8 + T cells, and to investigate its effect on CAR-T cells against colorectal cancer. Methods Correlation between the expression of IFI35 with the activation and cytotoxicity of CD8 + T cells was assessed with TCGA and proteomic databases. Then we constructed murine colon cancer cells over-expressing IFI35 and tested their effect on anti-tumor immunity in both immunodeficient and immunocompetent mouse models. Flow cytometry and immunohistochemistry were performed to assess the immune microenvironment. Western blot analysis was used to identify the potential down-stream signaling pathway regulated by IFI35. We further investigated the efficacy of the rhIFI35 protein in combination with immunotherapeutic treatment. Results The transcriptional and proteomic analysis of the activation and cytotoxicity of CD8 + T cells in human cancer samples demonstrated that IFI35 expression is correlated with increased CD8 + T cell infiltration and predicted a better outcome in colorectal cancer. The number and cytotoxicity of CD8 + T cells were significantly increased in IFI35-overexpressing tumors. Mechanistically, we identified that the IFNγ-STAT1-IRF7 axis stimulated IFI35 expression, and that IFI35-mediated regulation of CD8 + T cell proliferation and cytotoxicity was dependent on PI3K/AKT/mTOR signaling pathway in vitro. Furthermore, IFI35 protein enhanced the efficacy of CAR-T cells against colorectal cancer cells. Conclusion Our findings identify IFI35 as a new biomarker that can enhance the proliferation and function of CD8 + T cells, as well as increase the efficacy of CAR-T cells against colorectal cancer cells. Graphical Abstract
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高影响因子
IONICS
·
2023
·Vol. 29
·期 9
·3693-3701
·
IF 2.8
Tang Xiao,Wang Zhenwei,Cai Dandan,Shao Qinsi,Qin Ziwei,Liu Yang,Li Wenxian,Li Ying,Zhang Jiujun
Design and synthesis of high-performance and low-cost electrocatalysts for methanol oxidation reaction (MOR) are of great significance in energy conversion applications. In this work, g-NiO/CuO composites with high catalytic performance for MOR are successfully synthesized by a template method using g-C 3 N 4 flakes as the sacrificial template. NiO nanoparticles are dispersed uniformly on the surface of the pine needle-liked CuO substrate, resulting in a synergistic effect which can enhance the electrocatalytic MOR activity and stability of g-NiO/CuO catalysts. The catalyst shows a maximum peak current density of 159 mA cm −2 and also long-term stability. The bimetal-oxide-synergistic strategy in this work highlights a promising way for the design of catalysts with high electrochemical performance for direct methanol fuel cells (DMFCs).
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Advanced Fiber Materials
·
2023
·
IF 16.1
Mu Jiaxiang,Meng Zhaoxu,Liu Xinran,Guan Ping,Lian He
Photothermal therapy (PTT) has been proposed as an advanced patient-centered strategy for tumor treatment. Nevertheless, the uncertain safety of conventional photothermal conversion agents and the presence of intracellular self-protective autophagy mechanisms pose obstacles to the clinical application and efficacy of PTT. As we are deeply aware of the seriousness of these problems, we herein proposed an efficacy-enhancing strategy based on an implantable membrane platform (PPG@PB-HCQ) constructed from poly (lactic acid) (PLA), poly (ɛ-caprolactone) (PCL) and gelatin (Gel) electrospun nanofibers (PPG) and loaded with the biodegradable high-efficiency photothermal conversion agent Prussian blue (PB) and the autophagy inhibitor hydroxychloroquine sulfate (HCQ). Cellular experiments confirmed that the PPG@PB-HCQ nanofiber membrane exhibited a significantly stronger tumor cell-killing effect compared with the PTT alone. This enhancement features by of blocking the fusion of autophagosomes with lysosomes. The intracellular overexpression of the proteins microtubule-associated protein 1 light chain 3 (LC3)-II and p62 and the low expression of the proteins LC3-I and Rab7 (members of the RAS oncogene family) further demonstrated autophagic flux blockade. Importantly, the potent antitumor effect of the PPG@PB-HCQ therapeutic platform in B16 tumor-bearing model mice verified the efficacy-enhancing strategy of synergistic PTT and protective autophagy blockade. The present study provides a promising strategy for solving the difficulties of tumor treatment, as well as a new perspective for designing novel treatment platforms. Graphical Abstract
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JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-19
·
IF 10.2
Guo Ye,Xie Bingqing,Jiang Min,Yuan Lingling,Jiang Xueyu,Li Silei,Cai Rui,Chen Junliang,Jiang Xia,He Yun,Tao Gang
Bacterial infections can significantly impede wound healing and pose a serious threat to the patient’s life. The excessive use of antibiotics to combat bacterial infections has led to the emergence of multi-drug-resistant bacteria. Therefore, there is a pressing need for alternative approaches, such as photothermal therapy (PTT), to address this issue. In this study, for the first time, CuS NPs with photothermal properties were synthesized using sericin as a biological template, named CuS@Ser NPs. This method is simple, green, and does not produce toxic and harmful by-products. These nanoparticles were incorporated into a mixture (XK) of xanthan gum and konjac glucomannan (KGM) to obtain XK/CuS NPs composite hydrogel, which could overcome the limitations of current wound dressings. The composite hydrogel exhibited excellent mechanical flexibility, photothermal response, and biocompatibility. It also demonstrated potent antibacterial properties against both Gram-positive and negative bacteria via antibacterial experiments and accelerated wound healing in animal models. Additionally, it is proved that the hydrogel promoted tissue regeneration by stimulating collagen deposition, angiogenesis, and reducing inflammation. In summary, the XK/CuS NPs composite hydrogel presents a promising alternative for the clinical management of infected wounds, offering a new approach to promote infected wound healing.
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Nano Research
·
2023
·
IF 9.9
Ni Jing,Shi Zhaoping,Wang Yibo,Yang Jiahao,Wu Hongxiang,Wang Pengbo,Li Kai,Xiao Meiling,Liu Changpeng,Xing Wei
The scale-up deployment of ruthenium (Ru)-based oxygen evolution reaction (OER) electrocatalysts in proton exchange membrane water electrolysis (PEMWE) is greatly restricted by the poor stability. As the lattice-oxygen-mediated mechanism (LOM) has been identified as the major contributor to the fast performance degradation, impeding lattice oxygen diffusion to inhibit lattice oxygen participation is imperative, yet remains challenging due to the lack of efficient approaches. Herein, we strategically regulate the bonding nature of Ru-O towards suppressed LOM via Ru-based high-entropy oxide (HEO) construction. The lattice disorder in HEOs is believed to increase migration energy barrier of lattice oxygen. As a result, the screened Ti 23 Nb 9 Hf 13 W 12 Ru 43 O x exhibits 11.7 times slower lattice oxygen diffusion rate, 84% reduction in LOM ratio, and 29 times lifespan extension compared with the state-of-the-art RuO 2 catalyst. Our work opens up a feasible avenue to constructing stabilized Ru-based OER catalysts towards scalable application.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2023
·Vol. 25
·期 8
·1-15
·
IF 2.5
He Ting,Liu Yu,Zhang Shaoqi,Meng Chunhui,Li Le,Wang Hui,Zhen Deshuai
Near-infrared light-triggered UCNR@ZIF-67 antibacterial nanomaterials were constructed by combining β-NaYF 4 :Yb,Tm,Gd up-conversion nanorods (UCNRs) with near-infrared light response and Zeolitic Imidazolate Frameworks (ZIF-67) through the layer-by-layer self-assembly method. The optical properties, structure, composition, and morphology of UCNR@ZIF-67 were investigated by using UV–vis diffuse reflectance spectroscopy, X-ray diffraction and transmission electron microscopy. Reactive oxidizing species (ROS) detection indicated that the UCNR@ZIF-67 owned a good photodynamic efficacy. UCNR@ZIF-67 exhibited low toxicity and good biocompatibility by CCK-8 method. About 99.3% of E. coli and 99.1% of S. aureus were killed by UCNR@ZIF-67 under 980-nm laser irradiation for 25 min (1.0 W/cm 2 ). Under 980-nm laser excitation, UCNRs generated ultraviolet and visible light to activate ZIF-67 and produced a large number of electron/hole pairs (e − /h + ), which can react with O 2 and H 2 O to produced ROS for antibacterial applications.
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