ObjectiveTo investigate the anti-Alzheimer's disease （AD） effect of Dipsacus asper（DA） in the Caenorhabditis elegans model， and decipher the underlying mechanism via the peroxisome proliferator-activated receptor α （PPARα）/transcription factor EB （TFEB） pathway. MethodsFirst， transgenic AD C. elegans individuals were assigned into the blank control， model， positive control （WY14643， 20 µmol·L^-1）， and low-， medium-， and high-dose （100， 200， and 400 mg·L^-1， respectively） DA groups. The amyloid β-42 （Aβ₄₂） formation in the muscle cells， the paralysis time， and the deposition of amyloid β-protein （Aβ） in the head were detected. The lysosomal autophagy in the BV2 cell model was examined by Rluc-LC3wt/G120A. The expression levels of lysosomal autophagy-related proteins LC3Ⅱ， LC3I， LAMP2， and TFEB were detected by Western blot. Real-time quantitative polymerase chain reaction （Real-time PCR） was employed to determine the mRNA levels of autophagy-related genes beclin1 and Atg5 and lysosome-related genes LAMP2 and CLN2 downstream of PPARα/TFEB. A reporter gene assay was used to detect the transcriptional activities of PPARα and TFEB. Immunofluorescence was used to detect the fluorescence intensity of PPARα， and the active components of the ethanol extract of DA were identified by UPLC-MS. RCSB PDB， Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform （TCMSP）， and Autodock were used to analyze the binding between the active components and PPARα-ligand-binding domain （LBD）. ResultsCompared with the model group， the positive control group and 200 and 400 mg·L^-1 DA groups showed prolonged paralysis time （P<0.05）， and all the treatment groups showed decreased Aβ deposition in the head （P<0.01）. DA within the concentration range of 50-500 mg·L^-1 did not affect the viability of BV2 cells. In addition， DA enhanced the autophagy flux （P<0.05）， up-regulated the mRNA levels of beclin1， Atg5， LAMP2， and CLN2 （P<0.05， P<0.01）， promoted the nuclear translocation of TFEB （P<0.05）， increased LAMP2 expression and autophagy flux （P<0.05， P<0.01）， and enhanced the transcriptional activities of PPARα and TFEB （P<0.01）. The positive control group and 200 and 400 mg·L^-1 DA groups showed enhanced fluorescence intensity of PPARα in the BV2 nucleus （P<0.01）. UPLC-MS detected nine known compounds of DA， from which 8 active components of DA were screened out. The docking results suggested that a variety of components in DA could bind to PPARα-LBD and form stable hydrogen bonds. ConclusionDA may reduce the pathological changes in AD by regulating the PPARα-TFEB pathway.

ObjectiveTo explore the clinical safety of Feilike Mixture （FLK） in the real world. MethodsThe safety of all children who received FLK from 29 institutions in 12 provinces between January 21，2021 and December 25，2021 was evaluated through prospective centralized surveillance and a nested case control study. ResultsA total of 3 035 juveniles were included. There were 29 research centers involved，which are distributed across 12 provinces，including one traditional Chinese medicine （TCM） hospital and 28 general hospitals. The average age among the juveniles was （4.77±3.56） years old，and the average weight was （21.81±12.97） kg. Among them，119 cases （3.92%） of juveniles had a history of allergies. Acute bronchitis was the main diagnosis for juveniles，with 1 656 cases （54.46%）. FLK was first used in 2 016 cases （66.43%），and 142 juvenile patients had special dosages，accounting for 4.68%. Among them，92 adverse drug reactions （ADRs） occurred，including 73 cases of gastrointestinal system disorders，10 cases of metabolic and nutritional disorders，eight cases of skin and subcutaneous tissue diseases，two cases of vascular and lymphatic disorders，and one case of systemic diseases and various reactions at the administration site. The manifestations of ADRs were mainly diarrhea，stool discoloration，and vomiting，and no serious ADRs occurred. The results of multi-factor analysis indicated that special dosages （the use of FLK）［odds ratio （OR） of 2.642， 95% confidence interval （CI） of 1.105-6.323］，combined administration： spleen aminopeptide （OR of 4.978， 95%CI of 1.200-20.655），and reason for combined administration： anti-infection （OR of 1.814， 95%CI of 1.071-3.075） were the risk factors for ADRs caused by FLK. Conclusion92 ADRs occurred among 3 035 juveniles using FLK. The incidence of ADRs caused by FLK was 3.03%，and the severity was mainly mild or moderate. Generally，the prognosis was favorable after symptomatic treatment such as drug withdrawal or dosage reduction，suggesting that FLK has good clinical safety.

Chronic myeloid leukemia (CML) is a malignant hematologic disorder caused by abnormal proliferation of hematopoietic stem cells. In recent years, while the application of tyrosine kinase inhibitors (TKIs) has significantly improved the prognosis of CML patients through in-depth exploration of pathogenesis of CML and advancements in targeted therapies, some patients still face challenges including drug resistance, disease relapse, and failure to achieve treatment-free remission. Imunotherapy, as a complementary or alternative strategy, holds significant potential for overcoming these limitations, and has gradually emerged as a critical research focus in CML treatment. This review aims to summarize the current research status and latest advances in immunotherapy for CML.

Background Automotive repair workers are exposed to a wide variety of volatile organic compounds (VOCs) during painting operations, which poses significant health risks. Biomonitoring can directly reflect the internal body burden of these compounds. Therefore, it is essential to develop an analytical method for simultaneous determination of VOCs in the urine of automotive spray painting workers. Objective To establish a static headspace gas chromatography-mass spectrometry (GC-MS) method for simultaneously determining 22 VOCs in the urine of spray painting workers in automotive repair enterprises. Methods An automatic headspace sampler was used for the pretreatment of urine samples. The headspace conditions as well as the chromatographic and mass spectrometric conditions of static headspace GC-MS were optimized. The separation of 22 VOCs was achieved by optimizing the temperature program. Sensitivity was enhanced by optimizing the quantitative ions. The signal response of VOCs was improved by optimizing the headspace equilibrium temperature, equilibrium time, and the amount of inorganic salt added. The method's detection limit, lower limit of quantification, accuracy, precision, and stability were tested using blank urine samples spiked with standards. Additionally, the method was applied to examine 40 urine samples collected from painting workers in automotive repair enterprises in Tianjin. Results In this study, the headspace equilibrium temperature was set at 80 ℃, the equilibrium time was 30 min, and the salt addition amount was 2.0 g. A DB-624ms chromatographic column was selected for the separation of 22 VOCs. The initial temperature of heating program was 50 ℃, maintained for 15 min, and then increased to 85 ℃ at a heating rate of 10 ℃·min⁻¹ for 10 min, followed by increasing to 90 ℃ at a heating rate of 5 ℃·min⁻¹ for 20 min. The single ion monitoring (SIM) mode was chosen for the quantitative analysis of the 22 VOCs. The method demonstrated good linearity for determining 22 target analytes in the urine of spray painting workers, with correlation coefficients all above 0.990. The lower limits of quantification (LOQ) for the components ranged from 0.4 to 3.8 μg·L⁻¹. The spiked recovery rates of the samples were between 80.1% and 112.1%, and the relative standard deviations (RSD) ranged from 1.5% to 9.7%. All target analytes could be stored at 4 ℃ for 5 d and at −20 ℃ for 7 d. This method was applied to evaluate urine samples from 40 spray painting workers in automotive repair enterprises in Tianjin. The positive rate of butyl acetate was 37.5%. The positive rate of xylene was 32.5%. The positive rate of toluene was 30.0%. The positive rate of isopropanol was 25.0%. The concentration range of the detected substances was from −1. Conclusion The established simultaneous determination protocol of 22 VOCs by static headspace- GC-MS is characterized by its simplicity, high sensitivity, excellent selectivity, and high accuracy. It is suitable for urine samples of spray painting workers in automotive repair industry.

Background Currently, incidents of organic solvent poisoning are occurring frequently. Rapidly and accurately qualitative and quantitative analysis of toxic substances is crucial for the treatment of affected individuals. In recent years, many biomarker assays with good specificity and high sensitivity have been developed for the detection of exposure to organic solvents, but they cannot meet the demand for real-time and fast detection. Objective To establish a paper spray mass spectrometry method for direct and rapid detection of four organic compound metabolites (toluene diamine, 2,5-hexanedione, hippuric acid, and methylhippuric acid) in the urine of occupational populations. Methods Toluene diamine and 2,5-hexanedione were analyzed using positive ion mode, while hippuric acid and methylhippuric acid were analyzed using negative ion mode. The ion transfer tube temperature was 275 °C. The ion transfer tube voltage was 35 V. For positive ion mode, the scan range was 50-150 m/z. For negative ion mode, the scan range was 150-250 m/z. The distance from the paper substrate tip to the mass spectrometry inlet was 8 mm. The applied voltage was 3.5 kV. The spray solvent was methanol/water (90:10). The spray solvent volume was 15 μL. Under the optimized experimental conditions, both external standard and internal standard methods were used for quantitative analysis. Limit of detection, limit of quantification, accuracy, and precision of the proposed method were determined by spiking blank urine samples. To evaluate the feasibility of the method, the established approach was compared with current national standard detection methods or methods described in the literature. All methods were used to analyze 40 urine samples collected from occupationally exposed individuals (20 exposed to n-hexane and 20 exposed to toluene and xylene). Results The four biomarkers showed good linearity within their respective measurement ranges and the correlation coefficients were higher than 0.9990. The limits of detection of the method were in the range of 0.00027 to 0.020 μg·mL⁻¹, and the limits of quantification were in the range of 0.0009 to 0.067 μg·mL⁻¹. The spiked recoveries at low, medium, and high concentrations ranged from 96.5% to 106.9%, with relative standard deviations (RSDs) between 5.6% and 9.7%. When applying the method to 40 urine samples from occupationally exposed individuals, the detection rates for toluene diamine, 2,5-hexanedione, hippuric acid, and methylhippuric acid were 0%, 45%, 20%, and 37.5%, respectively. For biomarkers detected by both this method and the reference methods, the detection values were generally consistent. The analysis time per sample was approximately 1-2 min using paper spray mass spectrometry, compared to 1-2 h for reference methods. Conclusion The paper spray mass spectrometry method established in this study for detecting four organic compound metabolites in urine is characterized by its simplicity, rapidity, efficiency, and high accuracy. It can obtain results within 1-2 min, which significantly improves the timeliness of detection. It is suitable for direct and rapid screening of four organic compound metabolites in urine, and can provide technical support for the diagnosis and treatment of organic solution poisoning.

Cemental tear is a rare and indetectable condition unless obvious clinical signs present with the involvement of surrounding periodontal and periapical tissues. Due to its clinical manifestations similar to common dental issues, such as vertical root fracture, primary endodontic diseases, and periodontal diseases, as well as the low awareness of cemental tear for clinicians, misdiagnosis often occurs. The critical principle for cemental tear treatment is to remove torn fragments, and overlooking fragments leads to futile therapy, which could deteriorate the conditions of the affected teeth. Therefore, accurate diagnosis and subsequent appropriate interventions are vital for managing cemental tear. Novel diagnostic tools, including cone-beam computed tomography (CBCT), microscopes, and enamel matrix derivatives, have improved early detection and management, enhancing tooth retention. The implementation of standardized diagnostic criteria and treatment protocols, combined with improved clinical awareness among dental professionals, serves to mitigate risks of diagnostic errors and suboptimal therapeutic interventions. This expert consensus reviewed the epidemiology, pathogenesis, potential predisposing factors, clinical manifestations, diagnosis, differential diagnosis, treatment, and prognosis of cemental tear, aiming to provide a clinical guideline and facilitate clinicians to have a better understanding of cemental tear.
Humans ; Dental Cementum/injuries* ; Consensus ; Diagnosis, Differential ; Cone-Beam Computed Tomography ; Tooth Fractures/therapy*

Background Propylene glycol monomethyl ether (PGME) is a widely used organic solvent. It exists in the form of two isomers in the workplace, which will cause adverse effects such as eye and upper respiratory tract irritation in workers. However, there is still a lack of standard detection methods for simultaneous detection of two isomers of PGME in China. Objective To establish a solvent desorption-gas chromatographic method for two isomers of PGME [1-methoxy-2-propanol (α-PGME), 2-methoxy-1-propanol (β-PGME)] in workplace air. Methods A method of solvent desorption-gas chromatography for α-PGME and β-PGME in workplace air were proposed. Air samples were collected with solvent desorption activated carbon tubes, desorbed using a desorption solution of dichloromethane/methanol (85:15), and then separated on a free fatty acid phase (FFAP) fused silica capillary chromatography column , detected with a flame ionization detector (FID), and quantified by peak area. Standard evaluation protocol was followed to obtain key indicators: standard curve, limit of detection, lower limit of quantification, relative standard deviation (RSD) that measures precision, and spiked recovery of sample solutions that measures accuracy. Desorption efficiency, sampling efficiency, and adsorption capacity tests were conducted, sample stability was evaluated using spiked activated carbon tube preservation test, and interference test was also assessed. The developed method was then applied to field air sample testing. Results In this method, using dichloromethane/methanol (85:15) as the sample desorption solution, the quantitative detection ranges of α-PGME and β-PGME were 0.95-923.0 μg·mL⁻¹ and 0.97-912.0 μg·mL⁻¹ with both correlation coefficients of 0.999 9, the method limits of detection were 0.28 µg·mL⁻¹ and 0.29 µg·mL⁻¹, and the lower limits of quantification were 0.95 µg·mL⁻¹ and 0.97 µg·mL¹, respectively. The lowest concentrations detected were both 0.19 mg·m⁻³, and the lowest concentrations quantified were 0.63 mg·m⁻³ and 0.65 mg·m⁻³, respectively, under the conditions of sampling volume of 1.5 L and the volume of desorption solution of 1.0 mL. The intra-batch precisions for α-PGME and β-PGME were 2.8%-4.9% and 2.8%-5.1%, the inter-batch precisions were 4.2%-5.7% and 4.5%-5.9%, the spiked recoveries were 98.8%-100.3% and 96.4%-102.9%, and the desorption efficiencies were 92.7%-97.3% and 92.2%-98.1%, respectively. The average sampling efficiency was 100%, and the samples could be stored at room temperature (25-30 ℃) for at least 7 d and at 4 ℃ for at least 15 d. The adsorption capacities of the activated carbon sampling tube for α-PGME and β-PGME were greater than 13.9 mg and 2.7 mg (100 mg of activated carbon adsorbent), respectively. Possible co-existing components in workplace did not interfere with the determination of α-PGME and β-PGME. The short-time exposure concentrations of α-PGME and β-PGME in the spray painting unit of an automobile manufacturing company were determined to be 18.69 mg·m⁻³ and 2.19 mg·m⁻³, and the time-weighted average concentrations were 6.03 mg·m⁻³ and 1.08 mg·m⁻³ respectively. Conclusion This method is accurate, precise and suitable for on-site monitoring of the two isomers of PGME in workplace air.

As a rapid, accurate and efficient analytical technique, gas chromatography is widely used in the detection of volatile organic compounds and inorganic small molecule toxins, and it is the main analytical method in the national testing standards for occupational health. The existing effective national standards of gas chromatography for the detection of some substances have low column efficiency, high toxicity of reagents, poor correlation of the standard curve and low desorption efficiency and other problems, some of which can be solved through method improvement. At the same time, with the use of new materials and new processes, new types of toxic substances are emerging, and there are still many occupational disease hazards of limited value without supporting detection methods, gas chromatography can be applied to the detection of some toxic substances to better complement the vacancy of China's occupational health detection methods. This paper analyzes the current situation of the application of gas chromatography in occupational health testing standards, discusses the improvement of some of these methods, and helps to promote the application and development of gas chromatography in occupational health testing.

Objective:To use CiteSpace and VOSviewer software to perform visualization analysis on research literature on sudden poisoning incidents in China from 2013 to 2022, in order to grasp the research hotspots and priorities, current research development status and trend of sudden poisoning incidents, and provide reference and ideas for subsequent research.Methods:In October 2023, literature related to sudden poisoning incidents was searched using the China National Knowledge Infrastructure and Wanfang databases. The bibliometric analysis software CiteSpace 6.1.R2 and VOSviewer 1.6.19 were used to visually analyze factors such as authors, institutions, journals, regions, and keywords in the relevant literature.Results:A total of 2578 valid literatures were included, and the overall number of published literatures showed a discontinuous downward trend in recent 10 years. The relevant literature was distributed in 310 journals. Among the top 10 institutions with the highest number of publications, 8 were centers for disease control and prevention at all levels, and the institution with the highest number of publications was the Chinese Center for Disease Control and Prevention (208 articles), but the cooperation between institutions was not obvious. The 2578 articles involved a total of 6549 authors (a total of 8572 appearances, with an average of 1.31 times per person), with a collaboration rate of 2.54 (6549/2578) and 2153 co-authored articles (with 2 or more authors in the literature), with a co-authorship rate of 83.51%. 643 articles (24.94%) received funding support. The region with the highest number of publications was Guangdong Province, with a total of 380 articles (14.74%). Keyword highlighting analysis showed that the research heat of pesticide poisoning, toxic mushrooms, disease characteristics, outbreak events, traceability analysis, outbreaks, and occupational diseases continued to 2022.Conclusion:There are many literatures on sudden poisoning incidents in China, so it is necessary to strengthen the cooperation and communication between institutions and authors. In practical work, the ability of prevention, control, and detection of poisons should be continuously improved to reduce the incidence and degree of harm caused by sudden poisoning incidents.

As a rapid, accurate and efficient analytical technique, gas chromatography is widely used in the detection of volatile organic compounds and inorganic small molecule toxins, and it is the main analytical method in the national testing standards for occupational health. The existing effective national standards of gas chromatography for the detection of some substances have low column efficiency, high toxicity of reagents, poor correlation of the standard curve and low desorption efficiency and other problems, some of which can be solved through method improvement. At the same time, with the use of new materials and new processes, new types of toxic substances are emerging, and there are still many occupational disease hazards of limited value without supporting detection methods, gas chromatography can be applied to the detection of some toxic substances to better complement the vacancy of China's occupational health detection methods. This paper analyzes the current situation of the application of gas chromatography in occupational health testing standards, discusses the improvement of some of these methods, and helps to promote the application and development of gas chromatography in occupational health testing.