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Research Progress and Mechanism of cGAS-STING Pathway in Tumor Immunotherapy WANG Shihao, SHI Wanrui, LIU Yi, ZHANG Hao Chem. J. Chinese Universities    2025, 46 (1): 20240241-.   DOI: 10.7503/cjcu20240241 Abstract （846）   HTML （8）    PDF（pc） （9509KB）（247）       Knowledge map    Save The cyclic guanosine monophosphate-adenosine monophosphate（GMP-AMP） synthase（cGAS protein）- stimulator of interferon genes（STING protein)（cGAS-STING） signaling pathway is a crucial pathway for recognizing abnormal DNA in the cytoplasm and activating the innate immune response system. After recognizing abnormal DNA in the cytoplasm， cGAS protein can catalyze the synthesis of cyclic guanosine diphosphate adenosine（cyclic GMP-AMP， cGAMP） from adenosine triphosphate（ATP） and guanosine triphosphate（GTP）. cGAMP， as a second messenger， activates the stimulator of interferon gene（STING protein）， promoting the release of type I interferons and thus initiating a series of immune responses. The cGAS-STING pathway can regulate tumor metastasis and growth， participate in anti-tumor innate immune responses， and exploring the mechanism of action of the cGAS-STING pathway is of great significance in tumor immunotherapy. This review introduces the mechanism of action of the cGAS-STING pathway and summarizes various strategies currently used to activate the cGAS-STING pathway in anti-tumor immunotherapy. Table and Figures | Reference | Related Articles | Metrics

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Untargeted Lipidomics Reveals Lipid Metabolism Dysfunction During Macrophage Foaming WANG Zengyu, LIU Baohong, QIAO Liang, LIN Ling Chem. J. Chinese Universities    2024, 45 (11): 20240053-.   DOI: 10.7503/cjcu20240053 Abstract （671）   HTML （22）    PDF（pc） （6346KB）（143）       Knowledge map    Save Atherosclerosis is a multifactorial chronic complex disease characterized by the accumulation of lipids， inflammatory responses， and ultimately fibrous plaque formation within arterial walls. Plaque formation begins with the abnormal accumulation of lipids engulfed by macrophages within arterial walls， forming so-called foam cells. Despite the pivotal role of foam cell formation in the pathophysiological remodeling process of blood vessels， in-depth research into lipid metabolism disturbances during macrophage foam cell formation is still relatively lacking. In this study， we constructed and optimized a lipidomics analysis workflow， applying it to analyzing metabolic reprogramming during macrophage foam cell formation. A total of 645 lipid molecules belonging to 16 lipid subclasses were identified. Principal component analysis， time-series pattern analysis， and volcano plot analysis revealed significant differences in lipid levels at different stages of foam cell formation. As incubation time with oxidized low-density lipoprotein increased， the degree of lipid metabolism dysfunction in foam cells increased. Triglycerides， hemolytic phospholipids， and ether phospholipids were upregulated， while phosphatidylserine was downregulated. The significant accumulation of triglycerides enhanced the inflammatory response of macrophages， promoting foam cell formation by further engulfing oxidized low-density lipoprotein. Meanwhile， the synthesis of phosphatidylserine and hemolytic phosphatidylcholine increased significantly in the late stages of foam cell formation， indicating a positive correlation between foam cell formation and cell apoptosis. These lipid molecules may serve as signaling molecules to attract macrophages for the clearance of apoptotic cells. This study not only reveals the significant upregulation of inflammatory responses during foam cell formation but also elucidates the close connection between lipid metabolism disturbances and cell apoptosis signaling. Table and Figures | Reference | Related Articles | Metrics

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Research Progress in Exosome Isolation and Proteomics Analysis JIN Ying, ZHANG Junjie, ZHANG Yixin, YUAN Yue, HAN Zhenzhen Chem. J. Chinese Universities    2024, 45 (11): 20240305-.   DOI: 10.7503/cjcu20240305 Abstract （557）   HTML （29）    PDF（pc） （10724KB）（170）       Knowledge map    Save Exosomes are extracellular vesicles released via the fusion of multivesicular bodies with the cell plasma membrane， containing proteins， lipids， nucleic acids， etc. They transport cargo in the form of extracellular vesicles and participate in various cancer processes such as invasion and metastasis. As emerging targets for liquid biopsy， exosomes play crucial roles in cell communication， signal transduction， and immune response. Mass spectrometry has become an indispensable part of the field of proteomics research， and the proteomic analysis of exosomes is a promising method for discovering potential cancer biomarkers. Recent advances in high‐resolution separations， high‐performance mass spectrometry and comprehensive proteome databases have all contributed to the successful analysis of exosomes from patient samples. Here， this article reviews the isolation methods of exosomes， proteomics analysis techniques， and the application research of proteomics analysis based on exosomes in clinical disease diagnosis. Finally， the challenges faced by exosome isolation and proteomics， as well as the prospects for their clinical applications， are discussed and outlooked. Table and Figures | Reference | Related Articles | Metrics

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Internal Standard Method-based Surface-enhanced Raman Spectroscopy for Quantitative Analysis BI Yingna, LIU Dingbin Chem. J. Chinese Universities    2025, 46 (2): 20240457-.   DOI: 10.7503/cjcu20240457 Abstract （524）   HTML （30）    PDF（pc） （13761KB）（486）       Knowledge map    Save Surface-enhanced Raman spectroscopy（SERS） is a spectral detection method that has been widely used in the fields of disease diagnosis， drug screening， and biological analysis， etc. It can not only provide rich chemical fingerprint information but also has the advantages of high sensitivity， resistance to photobleaching， and photodegradation. However， due to the poor uniformity of its enhancement matrix structure and the uncertainty of the number of chemical molecules adsorbed， the reproducibility of SERS detection results is poor， which makes it face many challenges in quantitative analysis. The deployment of internal standards could eliminate the external interference factors， thus achieving accurate quantitative analysis. We set out this review with a description of the mechanism of internal-standard methods， followed by introducing their main types. Thereafter， we introduced explanations of the applications of internal-standard probes in environmental analysis， food and drug analysis， and biological analysis. We conclude with an outlook of challenges and future development directions of internal-standard SERS. Table and Figures | Reference | Related Articles | Metrics

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Development of Nucleic Acid Isothermal Amplification Technologies for Virus Detection XIAO Hang, WANG Xiaoyan, DENG Zhaojia, LIAO Wenjing, XIE Wenjing, PENG Hanyong Chem. J. Chinese Universities    2024, 45 (7): 20240139-.   DOI: 10.7503/cjcu20240139 Abstract （520）   HTML （31）    PDF（pc） （11274KB）（142）       Knowledge map    Save Viruses play a significant role in causing human diseases， and traditional PCR techniques have been widely used for their molecular diagnosis. However， the temperature requirements of PCR limit its application in field diagnostics. To address the need for rapid on-site diagnosis， isothermal nucleic acid amplification technologies have emerged as a promising alternative. These technologies enable nucleic acid amplification at a constant temperature without the need for thermal cycling， making them more adaptable for different diagnostic settings. This comprehensive review examines the latest advancements in isothermal amplification technologies for virus detection. It covers various aspects， including viral sample collection， nucleic acid extraction， and isothermal amplification detection. The review explores the principles， key parameters， and applications of enzyme-assisted isothermal amplification， enzyme-free isothermal amplification， and cascade amplification techniques integrated with multiple systems. Furthermore， a comparison of commercially available reagent kits is provided to highlight their respective characteristics. Additionally， the review discusses the current challenges faced by isothermal nucleic acid amplification technologies in pathogen detection， such as extraction efficiency， stability， and cost， and proposes future directions to enhance the on-site diagnostic efficacy of these technologies. Table and Figures | Reference | Related Articles | Metrics

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Research Progress on Luminescence Performance of Double Perovskite Quantum Dots Regulated by Ion Doping ZHANG Liyuan, WANG Chasina, HU Jingxiang, ZHAN Chuanlang Chem. J. Chinese Universities    2024, 45 (9): 20240126-.   DOI: 10.7503/cjcu20240126 Abstract （500）   HTML （37）    PDF（pc） （9391KB）（255）       Knowledge map    Save Lead based halide perovskite luminescent materials have attracted much attention due to their excellent properties such as flexible crystal structure， tunable bandgap， defect tolerance， and high fluorescence quantum yield. However， the toxicity of lead metal and the stability of perovskite have always been issues that hinder its commercial application and urgently need to be addressed. Therefore， exploring greener and more environmentally friendly non lead metal halide perovskite luminescent materials is becoming an increasing research topic. In recent years， non lead double perovskite structures， in which lead ions are replaced with monovalent and trivalent metal ions， have successfully achieved low toxicity and high stability， but their photoluminescence efficiencies are extremely low due to the indirect bandgap or parity-prohibited direct bandgap. To address this issue， scientists have explored ion doping strategies and successfully achieved a significant improvement in photoluminescence efficiency. In this article， the crystal structure and luminescent properties of non lead double perovskite materials are summarized. Second， the effects of doping with main group metals， rare earth metals， and transition metals on the luminescence performance and luminescent mechanism are summarized. Finally， the application of ion doping strategies and improving the performance of non lead perovskite luminescent materials are summarized and discussed. Table and Figures | Reference | Related Articles | Metrics

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Research Progress on Catalytic Oxidative Coupling Reaction of Aniline with Green Oxidants BAN Zhiyong, YANG Caoyu, FENG Qing, YIN Guojun, LI Guodong Chem. J. Chinese Universities    2024, 45 (8): 20240177-.   DOI: 10.7503/cjcu20240177 Abstract （500）   HTML （29）    PDF（pc） （12678KB）（276）       Knowledge map    Save Azobenzene and azoxybenzene compounds have exhibited broad application prospects in the fields of pigments， optical materials， fluorescent probes， and optoelectronic devices. Now many catalysts and oxidants have been developed for the oxidation coupling reaction of aniline to produce azobenzene and azoxybenzene compounds， and among them， developing the green， eco-friendly oxidation systems is still a hot but challenging issue in the current researches. Based on the above， this review summarizes the recent progress in catalyzing the selective oxidation of aniline to generate azobenzene and azoxybenzene compounds with the use of hydrogen peroxide and oxygen as oxidants， and meanwhile， discusses the possible mechanisms of aniline oxidation， mainly including nitrosobenzene intermediate mechanism and radical coupling mechanism. Finally， the potential problems and challenges in the synthesis of catalysts and the catalytic mechanisms have been summarized， and further researches have been prospected. This review will provide an important reference for the development of related fields. Table and Figures | Reference | Related Articles | Metrics

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Bacterial Protein Profiling JIANG Yan, CHEN Yanlin, SONG Gaoyu, CHEN Yanyan, BAI Jing, ZHU Yingdi, LI Juan Chem. J. Chinese Universities    2024, 45 (11): 20240345-.   DOI: 10.7503/cjcu20240345 Abstract （497）   HTML （14）    PDF（pc） （8276KB）（138）       Knowledge map    Save Profiling the protein composition of bacteria is essential for understanding their biology， physiology and interaction with environment. Mass spectrometry has become a pivotal tool for protein analysis， facilitating the examination of expression levels， molecular masses and structural modifications. In this study， we compared the performance of three widely-used mass spectrometry methods， i.e.， matrix-assisted laser desorption/ionization （MALDI） protein fingerprinting， top-down proteomics and bottom-up proteomics， in the profiling of bacterial protein composition. It was revealed that bottom-up proteomics provided the highest protein coverage and exhibited the greatest protein profile overlap between bacterial species. In contrast， MALDI protein fingerprinting demonstrated superior detection reproducibility and effectiveness in distinguishing between bacterial species. Although top-down proteomics identified fewer proteins than bottom-up approach， it complemented MALDI fingerprinting in the discovery of bacterial protein markers， both favoring abundant， stable， and hydrophilic bacterial ribosomal proteins. This study represents the most systematic and comprehensive comparison of mass spectrometry-based protein profiling methodologies to date. It provides valuable guidelines for the selection of appropriate profiling strategies for specific analytical purposes. This will facilitate studies across various fields， including infection diagnosis， antimicrobial resistance detection and pharmaceutical target discovery. Table and Figures | Reference | Related Articles | Metrics

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Single Cell Proteomic Analysis by Mass Spectrometry FAN Zhirui, FANG Qun, YANG Yi Chem. J. Chinese Universities    2024, 45 (11): 20240294-.   DOI: 10.7503/cjcu20240294 Abstract （470）   HTML （17）    PDF（pc） （13733KB）（90）       Knowledge map    Save Single-cell proteomics allows revealing precisely the differences of proteins between individual cells， which has become a research hotspot showing indispensable application value in many important fields. Its difficulties lie in the fact that the proteins in a single cell are of extremely low abundance， which calls for ingenious solutions to the problems of sample loss during preparation， low sensitivity of chromatography-mass spectrometry detection， and insufficient analysis of spectral data with low signal intensities. This review summarizes the current research progress of mass spectrometry-based single-cell proteomic analysis， including single-cell sorting， sample preparation， chromatography-mass spectrometry acquisition， and data analysis， as well as its applications in biomedical fields. Its potential future development is also discussed. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Advances and Challenges of Exosome Metabolomics in Body Fluids CAO Yiqing, HOU Jingxin, LIU Jianye, LI Yan Chem. J. Chinese Universities    2024, 45 (11): 20240324-.   DOI: 10.7503/cjcu20240324 Abstract （469）   HTML （649）    PDF（pc） （752KB）（334）       Knowledge map    Save Exosomes， ubiquitously present in body fluids， serve as non-invasive biomarkers for disease diagnosis， monitoring， and treatment. As intercellular messengers， exosomes encapsulate a rich array of proteins， nucleic acids， and metabolites， although most studies have primarily focused on proteins and RNA. Recently， exosome metabolomics has demonstrated clinical value and potential advantages in disease detection and pathophysiology， despite significant challenges， particularly in exosome isolation and metabolite detection. This review discusses the significant technical challenges in exosome isolation and metabolite detection， highlighting the advancements in these areas that support the clinical application of exosome metabolomics， and illustrates the potential of exosomal metabolites from various body fluids as biomarkers for early disease diagnosis and treatment. Table and Figures | Reference | Related Articles | Metrics

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Research Progress in Nanomaterial-induced Cuproptosis in Tumor Cells HE Kuo, DING Binbin, MA Ping’an, LIN Jun Chem. J. Chinese Universities    2025, 46 (1): 20230525-.   DOI: 10.7503/cjcu20230525 Abstract （466）   HTML （15）    PDF（pc） （33885KB）（149）       Knowledge map    Save Nanomaterials are considered as promising cancer treatment materials by selectively inducing programmed cell death（PCD） of tumor cells. Cuproptosis is a newly discovered PCD pattern caused by intracellular copper ion overload， characterized by the aggregation of acylated mitochondrial enzymes and the loss of Fe-S proteins. Various nanomaterials have been developed to induce cuproptosis in tumor cells as a treatment for cancer. Numerous studies have demonstrated that cuproptosis achieves better anti-tumor effects when combined with other tumor therapeutic modalities， showing a great potential. This paper introduces the mechanisms and characteristics of cellular cuproptosis， outlines the strategies and mechanisms of nanomaterial-induced cuproptosis in tumor cells， focuses on classifying and outlining the recent research progress of nanomaterial-induced cuproptosis combination therapy， and looks forward to the future prospects of this emerging therapeutic modality. Table and Figures | Reference | Related Articles | Metrics

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Ultrasound-aided Cellular Uptake and Endosomal Escape of Nanoparticles via the Membrane Surface Redox Reaction LI Yao, ZHAI Wanying, WANG Zheng, Petrov Alexey M., ZHANG Baoxin, ZHAO Yanjun Chem. J. Chinese Universities    2025, 46 (1): 20240265-.   DOI: 10.7503/cjcu20240265 Abstract （457）   HTML （4）    PDF（pc） （5993KB）（87）       Knowledge map    Save Cellular uptake and endosomal escape are two critical biological barriers to nanoscale drug delivery. The exofacial thiols at cell surface have been previously reported to simultaneously overcome these two barriers via the thiol-disulfide/diselenide exchange reaction. However， the power of such approach for nanomedicine delivery enhancement was limited. To address the above issue， we employed the mechanical force（ultrasound） that could significantly enhance the kinetics of thiol-disulfide/diselenide exchange reactions， and then the delivery efficiency. The discovery in the current work opens new avenues of tailored nanomedicine design to circumvent the delivery hurdles. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Research Progress on the Molecular Structure of Amorphous Chalcogen Elements SHI Wuyi, BAO Yu, CUI Shuxun Chem. J. Chinese Universities    2024, 45 (6): 20240054-.   DOI: 10.7503/cjcu20240054 Abstract （455）   HTML （43）    PDF（pc） （6540KB）（647）       Knowledge map    Save Chalcogen elements（including sulfur， selenium， and tellurium） are essential substances in the nature and have wide-range applications in photoelectric materials， batteries， semiconductors， and other fields. Chalcogen elements have two structural forms： crystalline and amorphous. While the molecular structure of crystalline chalcogen elements has been extensively investigated， the molecular structures of amorphous chalcogen elements remain uncertain. To better explore the potential applications of amorphous chalcogen elements， it is necessary to study their structure and properties. This paper summarizes recent advancements in understanding the molecular structure of amorphous chalcogen elements and envisages potential research directions. These efforts aim to contribute to a more comprehensive understanding of the properties of amorphous chalcogen elements and to foster their application across diverse fields. Table and Figures | Reference | Related Articles | Metrics

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Synthesis of COF-LZU1 in Acetate Buffer and Immobilized Enzyme Study LIU Meng, XU Yi, YANG Fan, ZHOU Quan, REN Jing, REN Ruipeng, LYU Yongkang Chem. J. Chinese Universities    2025, 46 (2): 20240368-.   DOI: 10.7503/cjcu20240368 Abstract （453）   HTML （13）    PDF（pc） （2218KB）（101）       Knowledge map    Save COF-LZU1 was synthesized in acetate buffer at room temperature and used to immobilize laccase and horseradish peroxidase. Firstly， by optimizing the reaction conditions such as reaction concentration， reaction time， pH value of the acetate buffer， reaction temperature， washing solvent and drying method. In acetate buffer， COF-LZU1 was synthesized with high crystallinity at pH=4.5 with stirring at room temperature for 30 min， which has high specific surface area up to 501 m2/g， and higher thermal stability（480 ℃）. Then， under the aforementioned optimal reaction conditions， laccase and horseradish peroxidase were immobilized by in situ embedding with COF-LZU1 as a carrier， and their properties were investigated， which showed that the enzyme activities after immobilization were as high as 84.26% and 73.66%（with respect to the free enzyme activity）， and the relative activities were still maintained at about 80% after cycling for 10 times of use. Through multiple binding sites， COF-LZU1 effectively stabilized the active conformation of the enzyme， which made it less prone to structural deformation and improved the thermal stability， pH stability and reusability of the enzyme， etc. Acetate buffer is a commonly used buffer in biochemical experiments， which was used as both a solvent and a catalyst in the present experiments. Compared with the existing synthetic methods， the method has a better effect on the stability of biomolecules and is expected to provide a new solution for enzyme immobilization. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Preparation of Electro-nanofiltration Membranes with High Li+/Mg2+ Separation Performance via Sequential Interfacial Polymerization LIU Huili, WANG Jing, CHEN Jiashuai, SONG Zhihao, JIANG Yumeng, GUO Zhiyuan, ZHANG Panpan, JI Zhiyong Chem. J. Chinese Universities    2024, 45 (6): 20230484-.   DOI: 10.7503/cjcu20230484 Abstract （451）   HTML （18）    PDF（pc） （2953KB）（170）       Knowledge map    Save Highly selective electro-nanofiltration membranes（ENFMs） were prepared by regulating the aqueous-phase monomers of interfacial polymerization（IP） and constructing the positively charged surface by sequential interfacial polymerization（SIP） for the separation of lithium and magnesium by selective electrodialysis processes. The IP reaction was carried out using different aqueous-phase monomers with trimesoyl chloride to achieve the regulation of the pore size and charging property of the separation membranes. The optimum Li+/Mg2+ separation performance（4.75） of the membrane was achieved when piperazine was used as the aqueous-phase monomer. Subsequently， the SIP reaction was utilized to introduce positively charged aqueous-phase monomer polyethyleneimine（PEI， MW=70000） of different concentrations on the optimal IP membrane surface， which converted the charge of the membrane surface from negative to positive. With the increase of PEI concentration， the positive charge density on the membrane surface increased significantly； the optimal SIP membrane achieved outstanding selectivity for Li+/Mg2+（15.90） and high Li+ flux（3.26×10‒8 mol⋅cm‒2⋅s‒1）， which breaks the traditional “Trade-off” effect and lays the foundation for the subsequent research and application of Li+/Mg2+ separation salt-lake brines. Table and Figures | Reference | Related Articles | Metrics

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First-principles Study on the Catalysis of OER/ORR by N-doped Graphene with Defects HUANG Zhiyao, LI Li, XU Huaqing, YANG Yifan, WEI Yaoyao, LIU Guokui, XIA Qiying Chem. J. Chinese Universities    2025, 46 (2): 20240430-.   DOI: 10.7503/cjcu20240430 Abstract （449）   HTML （14）    PDF（pc） （2927KB）（421）       Knowledge map    Save Non-metallic doped graphene-based catalysts have good application prospects in catalyzing oxygen evolution reaction（OER） and oxygen reduction reaction（ORR）. Based on the common double vacancy defects of graphene， non-metallic N-doped catalytic material was constructed and all possible active sites were studied. Through DFT calculation， we find that none of the 13 carbon active sites can effectively adsorb H2O， while O2 can be effectively adsorbed. The calculation results show that the optimal catalytic site for ORR is C12， with the overpotential of 0.71 V for catalyzing ORR， followed by the C10 site adjacent to pyridine N and C3 site， with the overpotentials of 0.75 V and 0.78 V， respectively. This study demonstrates that non-metallic N-doped defective graphene materials can be applied to catalyze ORR， providing theoretical support and guidance for non-metallic catalysis in the OER/ORR reactions. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Influence of Polycyclic Aromatic Hydrocarbon Molecular Framework on Single-molecule Conductance WANG Mingzhen, WANG Zhiye, LI Mengxiao, LU Yuhua, WANG Xu, LI Yunchuan Chem. J. Chinese Universities    2025, 46 (2): 20240429-.   DOI: 10.7503/cjcu20240429 Abstract （443）   HTML （15）    PDF（pc） （4103KB）（397）       Knowledge map    Save The charge transport process within molecular junctions is influenced by many factors， including the molecular backbones and anchoring groups. In this paper， to investigate the impact of the molecular backbone on the charge transport properties of molecular junctions， we designed and synthesized three kinds of polycyclic aromatic hydrocarbons（PAHs） with different fused-ring core（benzene， naphthalene and anthracene） as molecular skeleton and thiophene as anchor group. Scanning tunneling microscope break junction（STM-BJ） measurement and density functional theory（DFT） -based calculations were performed to investigate the charge transport process of single PAHs junctions. The STM experimental results of three molecules exhibit two distinct conductivity states， designated as high conductance states（GH） and low conductance states（GL）， which correspond to the two binding configurations of Au-π and Au-S within single molecular junctions for three molecules. In the case of the GL state， the increase of fused-ring core effectively shifts the HOMO level closer to the Au Fermi level， resulting in a conductance trend of GDT-A>GDT-N>GDT-B. In the GH state， the conductance value of three molecular junctions will not change obviously with the increase of π-conjugated area， but the increase in twist angle of PAHs results in an enhancement of steric hindrance， which reduces the probability of Au-π bonding configuration， ultimately leading to a change in the formation ratio of the two molecular configurations of Au-π and Au-S. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Mass Spectrometry-based Deep Coverage Proteome： Evaluation of Cellular Protein Extraction Methods XU Xia, QIN Weida, LI Ruomeng, WANG Qianqian, LIU Ning, LI Gongyu Chem. J. Chinese Universities    2024, 45 (11): 20240344-.   DOI: 10.7503/cjcu20240344 Abstract （439）   HTML （52）    PDF（pc） （2919KB）（117）       Knowledge map    Save The current study comprehensively evaluates four different protein extraction methods based on urea， sodium dodecyl sulfate（SDS）， anionic surfactants（BT）， and total RNA extractor（Trizol）， aiming to optimize the sample preparation workflow for mass spectrometry-based proteomics. Using HeLa cells as an example， we found that the method employing the mass spectrometry-compatible surfactant BT reagent significantly reduces the total time consumed for protein extraction and minimizes protein losses during the sample preparation process. Further integrating the four protein extraction methods， we identified over 7000 proteins from HeLa cells without relying on pre-fractionation techniques， and 2990 of them were quantified using label-free quantification. It is worth noting that the BT and SDS methods demonstrate higher efficiency in extracting membrane proteins， while the Urea and Trizol methods are more effective in extracting proteins from nuclear and cytoplasmic fractions. In summary， this study provides a novel solution for deep proteome coverage， particularly in the context of cellular protein extraction， by integrating mass spectrometry-compatible surfactants with traditional extraction methods to effectively enhance protein identification numbers. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Beta@ZIF-67 Composite for Catalytic Degradation of Polylactic Acid Plastics WANG Chenzhu, GAO Mingkun, GAO Yanjing, QI Sixian, YU Jihong Chem. J. Chinese Universities    2024, 45 (9): 20240221-.   DOI: 10.7503/cjcu20240221 Abstract （435）   HTML （43）    PDF（pc） （7297KB）（203）       Knowledge map    Save Biodegradable plastics， such as polylactic acid（PLA）， are preferable to traditional petroleum-based plastics. However， the natural degradation of PLA takes a long time and releases CO2. Therefore， upcycling PLA is a better option for achieving sustainable development. In this study， a Beta@ZIF-67 composite was developed for efficient catalytic degradation of waste PLA plastics， which was achieved by growing the zeolitic imidazolate framework-67（ZIF-67） on the surface of Beta zeolite. As a result， the real-life PLA plastics were completely converted to methyl lactate in just 4 h at 180 ℃ with a yield up to 76.4%. The high catalytic efficiency was attributed to the composite's open pore structure， large specific surface area， and the synergistic effect of the active sites provided by ZIF-67（Lewis acid/base） and Beta zeolite（Brønsted acid）. Overall， this study provides a new way for designing and synthesizing zeolite-based composite catalysts， which show promising applications in the catalytic degradation of plastics. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Research Progress of Allergen Detection in Aquatic Products ZUO Chunqian, XU Ruirui, BI Hongyan Chem. J. Chinese Universities    2024, 45 (11): 20240073-.   DOI: 10.7503/cjcu20240073 Abstract （432）   HTML （18）    PDF（pc） （3095KB）（81）       Knowledge map    Save Food allergy is an abnormal reaction of the body’s immune system to certain foods. It is a health problem that has gained widespread attention around the world. Food allergies commonly occur as a result of the immune system’s response to specific foods， often mediated by immunoglobulin E or immune cells. Allergens play a key role in triggering these reactions， underscoring the importance of detecting and identifying allergens to maintain food safety. As an important source of protein， aquatic products are an indispensable part of people’s daily diet， the detection of allergens in aquatic products is highly necessary. This review briefly describes the research progress of allergen detection in aquatic products such as fish and shellfish in recent years， and summarizes common allergens， detection methods and technologies， as well as challenges in current research and future development trends. At present， the detection methods for common food allergens currently face challenges， including limitations associated with low detection efficiency， reduced accuracy and high overall costs. These constraints underscore the need for ongoing research and innovation in this area to address these shortcomings. Combining different technical methods to establish efficient， accurate and low-cost allergen detection methods is still an important aspect in the development of this research field. Table and Figures | Reference | Related Articles | Metrics