INTERNATIONAL JOURNAL OF ANTIMICROBIAL AGENTS
·
2025
·
IF 4.6
Yi Lu,Xiaoying Yu,Yandi Pan,Hang Yin,Qingqing Yang,Xin Shen,Xuefeng Cao,Zhiwei Li,Lianci Peng,Rendong Fang
With the increased bacterial resistance to conventional antibiotics, there is an urgent need for the development of novel antimicrobial agents. Cathelicidins belonging to the family of cationic host defense peptides (HDPs) are a critical component of the innate immune system with antimicrobial and immunomodulatory activities. Our previous study has shown that CATH-1 exhibits potent bactericidal activity against Streptococcus suis ( S. suis ), but the underlying mechanism is still unclear. In this study, we investigated the effect of CATH-1 on the resistance development and antibacterial mechanisms against S. suis strain SC19. Our results revealed that CATH-1 did not induce bacterial drug-resistance. Proteomics and metabolomics analyses revealed that CATH-1 exerts its antibacterial effects by modulating multiple pathways, including the cell membrane, bacterial virulence, and energy metabolism pathway. Mechanistically, CATH-1 exerts dual antimicrobial effects by disrupting bacterial membrane integrity and targeting the serine/threonine kinase (STK) to inhibit capsular polysaccharide (CPS) synthesis. The interaction between STK and CATH-1 was evident by molecular docking, GST affinity-isolation assay, cellular thermal shift assay (CETSA) and drug affinity responsive target stability (DARTS). Furthermore, stk deficiency abrogated the anti- S. suis efficacy of CATH-1 both in vitro bactericidal assay and in vivo infection model, indicating that STK is the potential target of CATH-1. Our study reveals a novel antibacterial target of CATH-1, providing new insights into the development of antimicrobial peptides as anti-infective agents.
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Materials Today Bio
·
2025
·
IF 10.2
Chunyi Li,Kongcheng Wang,Jie Shao,Junmeng Zhu,Yaohua Ke,Baorui Liu,Lanqi Cen
Peptide vaccines have potential for tumour immunotherapy but face challenges in clinical trials, such as human leukocyte antigen limitations, potential cytotoxic T lymphocyte tolerance, short T-cell response duration, weak immune response, and other issues. Optimizing the antigens of peptide vaccines and selecting an effective delivery system are crucial for enhancing their antitumour effects. 3 multiepitope long peptides (NLP) targeting the NY-ESO-1 antigen were screened using bioinformatics methods. An engineered Lactococcus lactis strain (FOLactis) expressing FMS-like tyrosine kinase 3 ligand and the costimulator OX40 ligand was previously developed to activate immune cells. In this study, FOLactis was utilized as a biological carrier for NLP via Mg 2+ -based metal-organic frameworks to stimulate innate and adaptive immunity. The FOL-M@NLP were characterized, and various tumour models were established to assess the antitumour efficacy of the biovaccine. The preliminary mechanism of the immune effect induced by FOL-M@NLP was studied both in vivo and in vitro . The biovaccine FOL-M@NLP was effectively taken up by antigen-presenting cells (APCs). APCs were activated, activating the T-cell response. When FOL-M@NLP was administered subcutaneously in vivo , their antitumour activity was superior to that of NLP and FOLactis alone. The biovaccine improved the immune infiltrating state of the tumour microenvironment and metastasis niche, inhibited tumor progression and prevented recurrence. It is demonstrated that FOL-M@NLP serves as a potent and safe antitumour platform that enhances antigen peptide delivery and facilitates the advancement of therapeutic biological vaccine platforms.
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FOOD MICROBIOLOGY
·
2026
·
IF 5.4
Wei-Tao Zhai,Han Zhao,Li-Juan Chai,Wei Zhang,Xiao-Juan Zhang,Zhen-Ming Lu,Chuan-Qiang Gao,Guan-Ru Si,Wen-Qing Zhang,Song-Tao Wang,Cai-Hong Shen,Zheng-Hong Xu
1-Propanol is a crucial flavor compound in Jiang-flavor Baijiu, yet the key microbial pathways and environmental factors controlling its synthesis have not been systematically investigated. Using an integrated approach of metagenomics and culture-dependent techniques, this study identified the key microbes, pathways, and factors controlling 1-propanol synthesis. The highest 1-propanol level was detected in first-round base Baijiu, with rapid accumulation during early pit fermentation. Metagenomics revealed the propanoate pathway as the dominant route, primarily contributed by Limosilactobacillus , while Pichia and Saccharomyces were key providers of pyruvate decarboxylase in the citramalate and threonine pathways. Pure-culture validation confirmed that L. panis MR32 predominantly utilizes 1,2-propanediol as the precursor, while yeasts such as P. kudriavzevii 2J2 and S. cerevisiae LB7A prefer the 2-ketobutyrate pathway. Environmental tests revealed optimal 1-propanol production by L. panis MR32 at pH 5.5 and increasing yields with temperature (25–45 °C). In contrast, most yeasts produced the most 1-propanol at 30 °C, beyond which yields declined, with only P. kudriavzevii 2J2 and I. orientalis IO tolerating high lactic acid. Our findings clarify the microbial division of labor and environmental drivers of 1-propanol formation, enabling targeted fermentation control.
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Frontiers in Chemical Engineering
·
2026
·
IF 2.6
Gideon Abaidoo Ocran,Bosong Zhang,Yi Zuo,Huali Tan,Gudan Li,Hong Yang,Chunshan Song,Xinwen Guo
The epoxidation of allyl alcohol with H2O2 over titanium silicalite-1 (TS-1) is an environmentally friendly route for producing glycidol. However, the catalytic activity and stability of TS-1 is not satisfactory. In this study, strip-shaped TS-1 was hydrothermally treated by TPAOH solution, change theTi coordination states and diffusion property, thereby enhancing its catalytic performance. The influences of TPAOH concentration and treating time on the physical chemical property and catalytic performance were studied systematically. It was found that the SiO2 agglomerant was dissolved and crystallized during the treatment, resulting in an increased Si content on the external surface. The tetrahedrally coordinated Ti was transformed to pentahedrally and octahedrally coordinated Ti, which possess higher catalytic activity for selective oxidation. The treatment also leads to the formation of cavities in the TS-1 crystals, which can shorten the diffusion pathway of substates and improve the diffusion property. Both the chemical property and microstructure enhance the catalytic activity for allyl alcohol epoxidation.
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MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
He Cui,Chen Li,Raz Muhammad,Yuanyuan Wang,Zhihua Qian,Kaixin Song
In this study, (1- x )Ni 0.5 Zn 0.5 Fe 2 O 4 - x K 2 MoO 4 ((1- x )NZO- x KMO) composite ceramics were prepared through a cold sintering process. The research aimed to investigate the effect of different cold sintering conditions on the densification, phase, and magnetic/dielectric properties of the composites. The 0.6NZO-0.4KMO composite, prepared at 180 °C for 30 min under an applied pressure of 500 MPa, and utilizing 10 wt.% deionized water as a solvent, exhibited a high dielectric constant and permeability. SEM analysis revealed that the two phases were uniformly mixed, and the microstructure was dense. The cold sintering mechanism proposed for (1- x )NZO- x KMO composites suggests that the 'dissolution-precipitation' mechanism plays a key role in driving the densification of the ceramics.
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MATERIALS LETTERS
·
2014
·
IF 2.269
Shanshan Ji,Peixia Yang,Jinqiu Zhang,Ye Lian,Jie Zhang,Maozhong An
BMIm-OTF (1-Butyl-3-methylimidazolium trifluoromethanesulfonate) ionic liquid was used for the first time to prepare Cu 1.00 In 0.83 Ga 0.23 Se 1.64 thin films . The standard CIGS sample was calibrated using its inductively coupled plasma optical emission. The morphological properties were detected using scanning electron microscopy . The band gap of the CIGS thin film was approximately 1.55 eV, as measured using UV–visible absorption spectra . The carrier concentration and average Hall coefficient of the CIGS thin films were 2.741×10 20 cm −3 and 2.277×10 −2 cm 3 /C, respectively.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2015
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IF 3.368
Xiang Shen,Bing Yan
A series of luminescent Ln 3+ @bio-MOF-1 (Ln = Eu, Tb, bio-MOF-1 = Zn 8 (ad) 4 (BPDC) 6 O⋅2Me 2 NH 2 (ad = adeninate, BPDC = biphenyldicarboxylate)) are synthesized via postsynthetic cation exchange by encapsulating lanthanide ions into an anionic metal–organic framework (MOF), and their photophysical properties are studied. After loading 2-thenoyltrifluroacetone (TTA) as sensitized ligand by a gas diffusion (“ship-in-bottle”) method, it is found that the luminescent intensity of Eu 3+ is enhanced. Especially, when loading two different lanthanide cations into bio-MOF-1, the luminescent color can be tuned to close white (light pink) light output. Additionally, bio-MOF-1 and Eu 3+ @bio-MOF-1 are selected as representative samples for sensing metal ions . When bio-MOF-1 is immersed in the aqueous solutions of different metal ions , it shows highly sensitive sensing for Fe 3+ as well as Eu 3+ @bio-MOF-1 immersed in the DMF solutions of different metal ion. The results are benefit for the further application of functionalized bio-MOFs in practical fields.
研究领域:
无机化学
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材料科学
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分析化学
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纳米生物技术
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光物理学
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配位化学
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Advanced Science
·
2026
·
IF 14.1
Honggang Su,Huimin Pan,Yaqiang Liu,Wei Wang,Yang Jiao,Yumo Hang,Xiahe Huang,Yong E. Zhang,Yuhang Chen,Mei Ding,Xun Huang
Lipid droplets (LDs) are central to cellular energy homeostasis and lipid metabolism. While LD-associated proteins are known to regulate LD dynamics and function, their roles in LD transport and their broader cellular significance remain poorly understood. In this study, we identify lipid droplet-localized spindle apparatus coiled-coil protein 1 (SPDL1-L) as a key regulator of intracellular LD transport. SPDL1-L localizes to LDs through the synergistic action of its hydrophobic region and nearby basic residues. SPDL1-L expression promotes LD clustering at the microtubule-organizing center (MTOC) and the formation of donut-shaped (toroidal) nuclei during cell division. SPDL1-L-mediated LD clustering is likely through dynein-mediated minus end transport. LD clustering activity is diminished when the LD targeting or dynein binding function of SPDL1-L is impaired. Together, our findings provide new insights into the mechanisms governing LD dynamics and their impact on cellular organization.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2026
·
IF 6.2
Yinzhi Wang,Yunqing Zhou,Zhenzhen Wu,Hualiang Li,Chuanqi Shi,Siyi Bao,Jianhua Yan,Hao Zhang
The pyrolysis mechanism of polyethylene (PE) remains elusive owing to its inherent complexity and the difficulty in identifying reactive intermediates. In this work, 1-hexadecene was employed as a model compound and pyrolyzed in a custom low-pressure flow tube reactor. The pyrolysis intermediates and products were detected via in-situ electron ionization molecular beam mass spectrometry (EI-MBMS) across 300–980 °C. A total of up to 59 species were identified, including primary pyrolysis intermediates (PPIs), primary pyrolysis products (PPPs), secondary reaction intermediates (SRIs), and secondary reaction products (SRPs), with 16 key species quantified. Three distinct pyrolysis stages were revealed: at the initial stage (320–680°C), 1-hexadecene underwent limited decomposition, dominated by β -scission near the double bond, producing mainly unsaturated hydrocarbons, while hydrogen transfer reactions exhibited pronounced olefin selectivity. At the stage with increasing temperature (680–880°C), the radical concentration increased sharply, promoting extensive β -scission and the onset of secondary reactions. Aromatic precursors such as cyclopentadiene emerged, accompanied by intensified dehydrogenation. At the final stage (880–980°C), the reactant was nearly depleted, and olefins underwent deep cracking. Both Diels–Alder reactions and the chain reaction hydrocarbon aggregation (CHRCR) mechanism jointly drove aromatization, with the propargyl radical (C 3 H 3 ) serving as a key intermediate for the first aromatic ring formation. This study systematically elucidates the pyrolysis pathway of 1-hexadecene from radical initiation to aromatic and small-molecule formation, highlighting the temperature-dependent transition from primary bond scission to extensive dehydrogenation and aromatization. The findings offer fundamental insights for accurate modeling and optimization of polyethylene pyrolysis in chemical recycling.
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Journal of Engineered Fibers and Fabrics
·
2021
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IF 1.573
Ying Han,Jiaxun Li,Bobing He,Lixin Li
Environmental challenges, especially dye wastewater produced by printing and dyeing industry, pose a serious threat to global public health, and it is an urgent problem to realize harmless treatment of dye wastewater. Here, the combination of covalent organic framework materials (TpPa-1) and biological matrix materials (CF) was explored for the adsorption of dyes for the first time. The functional ACF-TpPa-1 composite adsorption materials were successfully prepared with collagen fiber (CF) made of leather waste as matrix, ethylenediamine (EDA) and covalent organic framework material (TpPa-1) as modified raw materials. It’s structure and properties were characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM). The experimental results showed that ACF-TpPa-1 had an adsorption capacity of 257.98 and 449.54 mg/g for acid fuchsia and reactive blue 19, respectively. It also showed excellent adsorption/desorption performance and repeatability after six cycles. As a collagen-based dye adsorbent with pH response, it has potential application prospects in the treatment of dye wastewater.
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CERAMICS INTERNATIONAL
·
2016
·Vol. 43
·期 1
·1552-1557
·
IF 2.758
Hua Lan,Shangshu Qian,Qin Wang,Lei Yan,Haoxiang Yu,Peng Li,Nengbing Long,Miao Shui,Jie Shu
In order to further expand the application of lithium titanate anode materials for lithium ion batteries (LIBs), a series of Sr 1−x Na 2x Li 2 Ti 6 O 14 (x=0, 0.25, 0.5, 0.75, 1) have been synthesized by the solid-state method. The structure, morphology and their electrochemical properties have been investigated by X-ray diffraction (XRD), scanning electronic microscope (SEM), high-resolution transmission electron microscope (HRTEM), galvanostatic charge-discharge tests and electrochemical impedance spectroscopy (EIS) measurements. Electrochemical analysis suggests Sr 0.5 NaLi 2 Ti 6 O 14 to show the better cycling stability, delivering a charge capacity of 184 mA h g −1 at the current density of 50 mA g −1 for the first cycle, and to exhibit reversible capacity of 176.8 mA h g −1 after 50 cycles corresponding to 0.0782% capacity decrease per cycle. Besides, Sr 0.5 NaLi 2 Ti 6 O 14 also has the highest lithium-ion diffusion coefficient among all the examined samples.
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Translational Psychiatry
·
2026
·
IF 7.5
Liu Yiran,Liu Xiao,Yin Xueyong,Li Yunluo,Yu Xiaohui,Nan Xinyu,Xue Jiping,Lu Hengtai,Li Bingyu,Zhou Fei,Liu Xiaoyu,Zhang Xiangyu,He Xiangjun,Yu Xi,Yan Shu,Li Yating,Wang Shuang,Gao Yuan,Liu Yifan,Kang Ying,Zhang Jingwen,Zhao Ye,Shi Haishui
Defensive aggression is an evolutionarily conserved instinct, and its dysregulation represents a common behavioral manifestation in multiple psychiatric disorders. Although glucagon-like peptide-1 receptor agonists (GLP-1RAs) are widely used for metabolic diseases, their role in aggressive behavior remains unclear. Here, we employed behavioral assays, chemogenetics, immunofluorescence, pharmacological manipulations, and metabolomics to investigate the regulatory effects of GLP-1RA on defensive aggression in mice. Acute intracerebroventricular administration of GLP-1RA significantly suppressed defensive aggression without affecting locomotor activity or time spent in the center of the open field. c-Fos immunofluorescence indicated that this effect was associated with reduced neuronal activity in the dorsomedial periaqueductal gray (DMPAG). Chemogenetic activation of DMPAG neurons reversed the suppressive effect of GLP-1RA on defensive aggression, supporting a key regulatory role of this region. In a social isolation (SI) induced pathological aggression model, GLP-1RA alleviated excessive defensive aggression and modulated the metabolic state of the DMPAG. Notably, GLP-1RA restored levels of L-carnosine, a dipeptide with neuroprotective and anti-excitotoxic properties whose levels were reduced in SI mice. Carnosine infusion into the DMPAG suppressed defensive aggression in SI mice, whereas administration of the carnosine degrading enzyme CNDP2 attenuated the suppressive effect of GLP-1RA, supporting carnosine signaling as a functionally relevant downstream component. These findings identify a carnosine-associated pathway by which GLP-1RA regulates defensive aggression and highlight its therapeutic potential beyond metabolic regulation.
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