Objective To analyze the emergency testing results of a mixed poisoning incident involving methyl acetate and dimethyl carbonate in a composite fabric processing enterprise. Methods A mixed poisoning incident involving methyl acetate and dimethyl carbonate occurred at a composite fabric processing enterprise in a city of Guangdong Province. On-site occupational health investigation data and laboratory testing results related to this incident were collected, and an integrated analysis was conducted. Results The on-site occupational health investigation revealed inadequate ventilation and non-standard use of personal protective equipment. Volatile organic component analysis of raw and auxiliary materials showed that methyl acetate and dimethyl carbonate had relatively high percentages of peak area among all used volatile organic chemical agents in post-incident emergency testing, accounting for 65.10% and 38.25%, respectively. The exposure concentration of short term (C_STE) of methyl acetate in the production line air was 15.13 mg/m³. In the chemical storage area, C_STE of methyl acetate and methanol were 451.04 and <0.21 mg/m³, respectively, all below their respective occupational exposure limits (500.00 and 50.00 mg/m³). In the poisoned workers, blood methanol, blood formic acid, and urinary formic acid levels were 147, 414, and 4 389 mg/L, respectively. Conclusion Occupational exposure to methyl acetate and dimethyl carbonate may lead to acute occupational poisoning and cause health damage. Employers should fulfill their responsibilities for occupational disease prevention by ensuring proper operation of protective facilities, while workers should enhance awareness of occupational disease prevention and correctly use personal protective equipment.

Objective To establish a liquid chromatography method for the simultaneous determination of 13 aromatic amine compounds (AAs) in workplace air. Methods A total of 13 AAs in both vapor and aerosol phases were collected in workplace air using a new GDH-6 sampling tube. Samples were desorbed and eluted with methanol, separated using a Symmetry Shield™ RP₁₈ reversed-phase liquid chromatography column, and detected with a diode array detector. Quantification was performed using an external standard method. Results The linear range of the 13 AAs measured by this method was 0.02-373.60 μg/L with the correlation coefficients greater than 0.999 0. The minimum detection concentration was 0.09-14.37 μg/m³, and the minimum quantitative concentration was 0.31-47.90 μg/m³ (both calculated based on sampling 15.0 L of air and 3.0 mL of elution volume). The average desorption and elution efficiency ranged from 97.46% to 101.23%. The within-run relative standard deviation (RSD) was 0.10%-5.99%, and the between-run RSD was 0.17%-2.71%. Samples could be stably stored in sealed conditions at 2-8 ℃ for more than seven days. Conclusion This method is suitable for the simultaneous determination of 13 AAs in workplace air, including both vapor and aerosol phases.

OBJECTIVES: To explore the efficacy of DSA-guided intrathecal drug delivery system combined with Zi Wu Liu Zhu Acupoint Therapy for management of cancer pain and provide reference for its standardized clinical application. Methods and. RESULTS: Recommendations were formulated based on literature review and expert group discussion, and consensus was reached following expert consultation. The consensus recommendations are comprehensive, covering the entire treatment procedures from preoperative assessment and preparation, surgical operation process, postoperative management and traditional Chinese medicine treatment to individualized treatment planning. The study results showed that the treatment plans combining traditional Chinese with Western medicine effectively alleviated cancer pain, reduced the use of opioid drugs, and significantly improved the quality of life and enhanced immune function of the patients. Postoperative follow-up suggested good treatment tolerance among the patients without serious complications. CONCLUSIONS The formulated consensus is comprehensive and can provide reference for clinicians to use DSA-guided intrathecal drug delivery system combined with Zi Wu Liu Zhu Acupoint Therapy. The combined treatment has a high clinical value with a good safety profile for management of cancer pain.
Humans ; Medicine, Chinese Traditional ; Cancer Pain/therapy* ; Drugs, Chinese Herbal/therapeutic use* ; Drug Delivery Systems ; Pain Management/methods* ; China

OBJECTIVE: To explore the effects and mechanisms of the C-X-C motif chemokine ligand 12/C-X-C motif chemokine receptor 4 (CXCL12/CXCR4) signaling axis on apoptosis and autophagy in SH-SY5Y neuronal cells subjected to oxygen-glucose deprivation/reperfusion (OGD/R) model in vitro. METHODS: SH-SY5Y cells were divided into the following groups: OGD/R group and non-OGD/R group, with the OGD/R group subjected to OGD/R modeling and the non-OGD/R group receiving no treatment. Cells were also divided into CXCL12⁺ and CXCL12^- groups; the CXCL12⁺ group received 0.1 mg/L exogenous recombinant CXCL12 (rhCXCL12) at reoxygenation, while the CXCL12^- group did not. Another set of cells was divided into CXCL12+AMD3100 and CXCL12 groups; the CXCL12+AMD3100 group was pretreated with 2.5 mg/L AMD3100, a CXCR4 inhibitor, for 2 hours before OGD/R and received both 2.5 mg/L AMD3100 and 0.1 mg/L rhCXCL12 at reoxygenation, whereas the CXCL12 group received rhCXCL12 only. Additionally, cells were divided into small interfering RNA CXCR4 (siCXCR4) and small interfering RNA negative control (siNC) groups; the siCXCR4 group underwent CXCR4 knockdown before OGD/R modeling and received 0.1 mg/L rhCXCL12 at reoxygenation, while the siNC group, transfected with a negative control, received the same treatment. Protein expression of autophagy-related 16 (ATG16), microtubule-associated protein 1 light chain 3 (LC3), aquaporin-3 (AQP3), and CXCR4 was detected by Western blotting. Apoptosis rate and CXCR4 expression were measured by flow cytometry. RESULTS: Compared with the non-OGD/R group, the OGD/R group showed a significantly increased apoptosis rate and markedly decreased protein expression levels of ATG16, LC3, AQP3, and CXCR4 (all P < 0.05). CXCR4 fluorescent expression was also significantly reduced, suggesting that OGD/R simultaneously affects neuronal apoptosis and autophagy while inhibiting CXCR4 and AQP3 expression in SH-SY5Y cells. Compared with the CXCL12^- group, the CXCL12⁺ group exhibited no significant change in apoptosis rate but demonstrated significantly increased protein expression of ATG16, LC3, and AQP3 (ATG16/GAPDH: 1.21±0.10 vs. 1.00±0.00; LC3/β-actin: 1.22±0.10 vs. 1.00±0.00; AQP3/β-actin: 1.26±0.04 vs. 1.00±0.00; all P < 0.05). CXCR4 expression was also significantly enhanced (fluorescence intensity: 1.19±0.05 vs. 1.00±0.00, P < 0.05), indicating that CXCL12 may promote autophagy in OGD/R-injured SH-SY5Y cells via the CXCR4/AQP3 pathway. Compared with the CXCL12 group, the CXCL12+AMD3100 group showed no significant difference in apoptosis rate but significantly lower protein levels of ATG16 and LC3 (ATG16/GAPDH: 0.75±0.08 vs. 1.00±0.00; LC3/GAPDH: 0.86±0.07 vs. 1.00±0.00; both P < 0.05), suggesting that CXCL12 induces autophagy in OGD/R SH-SY5Y cells through CXCR4. Compared with the siNC group, the siCXCR4 group showed no significant change in apoptosis rate but significantly reduced protein expression of ATG16, LC3, AQP3, and CXCR4 (ATG16/GAPDH: 0.76±0.06 vs. 1.00±0.00; LC3/GAPDH: 0.79±0.11 vs. 1.00±0.00; AQP3/GAPDH: 0.81±0.05 vs. 1.00±0.00; CXCR4/GAPDH: 0.86±0.04 vs. 1.00±0.00; all P < 0.05), indicating that CXCR4 knockdown suppresses OGD/R-induced autophagy in SH-SY5Y cells likely via AQP3. CONCLUSIONS The CXCL12/CXCR4 signaling axis can regulate OGD/R-induced autophagy in SH-SY5Y cells through AQP3 without affecting apoptosis, indicating a role for this pathway in neuronal autophagy during cerebral ischemia/reperfusion injury.
Humans ; Receptors, CXCR4/metabolism* ; Chemokine CXCL12/metabolism* ; Autophagy ; Glucose/metabolism* ; Apoptosis ; Neurons/cytology* ; Oxygen/metabolism* ; Signal Transduction ; Cell Line, Tumor ; Cell Hypoxia ; Benzylamines ; Cyclams

Objective To investigate the technical capacity and service quality of occupational health technical service institutions (hereinafter referred to as "occupational health institutions") in Guangdong Province. Methods All occupational health institutions in Guangdong Province that had valid occupational health service qualifications and within the validity period were included for analysis. Data on basic information, employed personnel, and results of professional technical capacity assessments across occupational health institutions were obtained through the Guangdong Provincial Occupational Health Technical Quality Control Center. Results A total of 99 institutions with 2 732 technical staff were included in this study. Occupational health institutions in Guangdong Province were mainly distributed in the Pearl River Delta region, accounting for 87.9% (87/99) of the total. The number of public and private health institutions was 23 and 76, accounted for 23.2% and 76.8% respectively. In terms of technical personnel, the percentage of individuals worked in public or private health institutions was 24.1% and 75.9%, respectively. Personnel titles were predominantly intermediate level and no title, accounting for 38.7% and 26.4%, respectively. Individuals with a bachelor′s degree or above accounted for 67.4%. Engineering and other professionals accounted for 35.4% and 30.5%, respectively. Private institutions undertook 97.3% of testing and evaluation workload related to occupational hazard in the province. The number of occupational health institutes acquiring category Ⅰ and Ⅱ service license were 97 and 13. Among institutions participating in inter-laboratory comparisons, the overall pass rates for quantitative items were 95.5% in public and 70.3% in private institutions, while the pass rates for qualitative items were 100.0% and 94.5%, respectively. Conclusion Occupational health institutions in Guangdong Province face issues such as imbalanced regional distribution, uneven development, and insufficient technical competence and testing capacity of professional personnel. Health authorities at all levels should continue to strengthen supervision and quality control to solidify the technical foundation and comprehensively enhance service capacity and quality.

Purpose This study aims to investigate the clinicopathological features of diffuse pulmonary menin-gotheliomatosis(DPM).Methods The clinical data of 10 patients with DPM undergoing video-assisted thoracic sur-gery(VATS)were collected,and their clinical and pathological characteristics were analyzed using immunohistochem-istry.Results The detection rate of DPM was 1.19‰,with 90％of the patients being female.DPM predominantly occurred in the age range of 40-60 years,with an average age at diagnosis of 50.7 years.Most patients had no smok-ing history.Pathological diagnosis combined with imaging findings was the main method for diagnosing DPM.80％of the patients were prone to concurrent early-stage invasive pulmonary adenocarcinoma.Laboratory indicators,including pulmonary function,were generally normal.Chest CT showed diffuse multiple ground-glass opacity or cystic nodules in both lungs,with the number of nodules in both lungs ranging from dozens to hundreds,and the maximum diameter of the nodules was 2-6 mm.The median volume and CT value of the pulmonary nodules were 35.32 mm3 and-566 HU,respectively.Pathological features mainly included multiple meningothelial-like nodules observed under the micro-scope.Immunophenotypically,CD56,EMA,PR,and vimentin were often positive.Conclusion DPM is a rare lung disease with no obvious clinical symptoms,and is more common in middle-aged and elderly women.Diffuse multiple nodules in both lungs are its main imaging features.Most DPM patients are complicated with lung adenocarcinoma,and regular follow-up is recommended.

Objective To establish a high-throughput HPLC method for the simultaneous determination of 11 common antibacterial agents in acyclovir eye drops and to evaluate the quality and safety of the antibacterial agents in 42 batches of national drug inspection samples.Methods Gradient elution was performed on a Kromasil 100-5-C18(4.6 mm×250 mm,5 μm)column with acetonitrile-5 mmol·L-1 ammonium acetate aqueous solution(containing 1%triethylamine,pH adjusted to 4.5 by acetic acid)as the mobile phase.The detection wavelength was 262 nm.Results Good linear relationships were obtained for 11 antibacterial agents(r≥0.999 9).The average recovery range was 98.2%-101.8%,and the RSD was 0.7%-2.7%(n=9).As revealed by the systematic analysis of 42 batches of national drug inspection samples,some batches of samples were detected with out-of-prescription antibacterial agents 4-hydroxybenzoic acid and ethylparaben,and the results were 0.02-49 μg·mL-1.This indicated that ethylparaben degradation and colinear production pollution were the two major risk sources.Conclusions The method is accurate,sensitive,and specific and can be used for the qualitative and quantitative detection of antibacterial agents in acyclovir eye drops.Besides,some products have degradation of antibacterial agents and incomplete cleaning during co-linear production.It is still essential to further reinforce product quality control.

Objective To evaluate the prognostic value of monocyte human leukocyte antigen-DR(mHLA-DR),neutrophil-to-lymphocyte ratio(NLR),and CD4+T lymphocytes in sepsis.Methods A total of 29 patients with sepsis who were admitted to the department of critical care medicine of Qingdao Municipal Hospital from December 2023 to September 2024 were collected as the study subjects,and the patients were divided into survival group(20 cases)and death group(9 cases)according to the 28-day prognosis.Baseline data were collected from patients at the time of admission[including gender,age,acute physiology and chronic health evaluationⅡ(APACHEⅡ)score,sequential organ failure assessment(SOFA),white blood cell count(WBC),NLR,hemoglobin(Hb),platelet count(PLT),C-reactive protein(CRP),total protein(TP),alanine aminotransferase(ALT),aspartate aminotransferase(AST),creatinine(Cr),CD4+T lymphocyte count]and the mHLA-DR expression rate on the 1st,3rd,and 7th days of admission,and the difference between the mHLA-DR expression rate on the 3rd,7th and 1st days of admission and the 1st day of admission was calculated,which was recorded as ΔH3 and ΔH7.The receiver operator characteristic curve(ROC curve)was used to evaluate the predictive value of mHLA-DR expression,NLR,CD4+T lymphocyte count,SOFA score and APACHEⅡscore on the 28-day mortality risk of sepsis.Results Compared with the survival group,the APACHEⅡscore,SOFA score and NLR in the death group were significantly increased,and the ΔH7 and CD4+T lymphocyte counts were significantly decreased(all P<0.05).ROC curve analysis showed that ΔH7,NLR,CD4+T lymphocyte count,SOFA score and APACHEⅡscore were predictive of the 28-day prognosis of sepsis patients,and area under the curve(AUC)and 95%confidence interval(95%CI)were 0.817(0.635-0.999),0.789(0.611-0.966),0.786(0.588-0.985),and 0.853(0.685-1.000),0.844(0.659-1.000),all P<0.05.The combined detection of ΔH7 combined with NLR,ΔH7 combined with CD4+T lymphocytes,NLR combined with CD4+T lymphocytes,and ΔH7,NLR,and CD4+T lymphocytes also had predictive value for the 28-day prognosis of sepsis patients,with AUC and 95%CI of 0.867(0.735-0.998),0.878(0.752-1.000),0.883(0.760-1.000),and 0.928(0.837-1.000),respectively,all P<0.05.Conclusion The NLR and CD4+T lymphocyte count on the first day of admission to the hospital could predict the prognosis of sepsis patients,and the dynamic monitoring of mHLA-DR expression level in sepsis patients could also predict the prognosis of sepsis patients,but a single measurement of mHLA-DR expression level within 7 days was meaningless.In terms of single indicators,ΔH7 had the best predictor of the prognosis of sepsis patients among the 3 indicators of ΔH7,NLR and CD4+T lymphocyte count,and the combined detection of the 3 indicators was more advantageous in the prognosis of sepsis patients.

Objective To evaluate the prognostic value of monocyte human leukocyte antigen-DR(mHLA-DR),neutrophil-to-lymphocyte ratio(NLR),and CD4+T lymphocytes in sepsis.Methods A total of 29 patients with sepsis who were admitted to the department of critical care medicine of Qingdao Municipal Hospital from December 2023 to September 2024 were collected as the study subjects,and the patients were divided into survival group(20 cases)and death group(9 cases)according to the 28-day prognosis.Baseline data were collected from patients at the time of admission[including gender,age,acute physiology and chronic health evaluationⅡ(APACHEⅡ)score,sequential organ failure assessment(SOFA),white blood cell count(WBC),NLR,hemoglobin(Hb),platelet count(PLT),C-reactive protein(CRP),total protein(TP),alanine aminotransferase(ALT),aspartate aminotransferase(AST),creatinine(Cr),CD4+T lymphocyte count]and the mHLA-DR expression rate on the 1st,3rd,and 7th days of admission,and the difference between the mHLA-DR expression rate on the 3rd,7th and 1st days of admission and the 1st day of admission was calculated,which was recorded as ΔH3 and ΔH7.The receiver operator characteristic curve(ROC curve)was used to evaluate the predictive value of mHLA-DR expression,NLR,CD4+T lymphocyte count,SOFA score and APACHEⅡscore on the 28-day mortality risk of sepsis.Results Compared with the survival group,the APACHEⅡscore,SOFA score and NLR in the death group were significantly increased,and the ΔH7 and CD4+T lymphocyte counts were significantly decreased(all P<0.05).ROC curve analysis showed that ΔH7,NLR,CD4+T lymphocyte count,SOFA score and APACHEⅡscore were predictive of the 28-day prognosis of sepsis patients,and area under the curve(AUC)and 95%confidence interval(95%CI)were 0.817(0.635-0.999),0.789(0.611-0.966),0.786(0.588-0.985),and 0.853(0.685-1.000),0.844(0.659-1.000),all P<0.05.The combined detection of ΔH7 combined with NLR,ΔH7 combined with CD4+T lymphocytes,NLR combined with CD4+T lymphocytes,and ΔH7,NLR,and CD4+T lymphocytes also had predictive value for the 28-day prognosis of sepsis patients,with AUC and 95%CI of 0.867(0.735-0.998),0.878(0.752-1.000),0.883(0.760-1.000),and 0.928(0.837-1.000),respectively,all P<0.05.Conclusion The NLR and CD4+T lymphocyte count on the first day of admission to the hospital could predict the prognosis of sepsis patients,and the dynamic monitoring of mHLA-DR expression level in sepsis patients could also predict the prognosis of sepsis patients,but a single measurement of mHLA-DR expression level within 7 days was meaningless.In terms of single indicators,ΔH7 had the best predictor of the prognosis of sepsis patients among the 3 indicators of ΔH7,NLR and CD4+T lymphocyte count,and the combined detection of the 3 indicators was more advantageous in the prognosis of sepsis patients.

Objective:To investigate the clinical diagnosis and treatment of granulomatous prostatitis（GP）in patients with Prostate Imaging Reporting and Data System（PI-RADS）scores ≥ 4 on magnetic resonance imaging（MRI）.Methods:The data of 12 GP patients with PI-RADS score ≥ 4 who were admitted to Beijing Chaoyang Hospital，Capital Medical University，from February 2015 to February 2025，were retrospectively analyzed. The patients were aged 51?73 years（mean 66 years）. Presenting complaints included elevated prostate-specific antigen（PSA）levels in 6 cases，prostatic mass in 2 cases，urinary retention in 3 cases，and gross hematuria in 1 case. All 12 patients had concomitant lower urinary tract symptoms. Medical history revealed pulmonary tuberculosis in 2 cases，testicular tuberculosis in 1 case，close contact with tuberculosis in 1 case（spouse diagnosed with pulmonary tuberculosis 5 years earlier），allergic granulomatous vasculitis in 1 case，and intravesical bacillus Calmette-Guérin（BCG）instillation in 1 case. Digital rectal examination（DRE）showed gradeⅠprostatic hyperplasia in 2 cases，grade Ⅱ in 9 cases，and grade Ⅲ in 1 case. Nodules were palpable in 6 patients. The median PSA was 7.20 ng/ml（ranging 1.11?21.90 ng/ml），with 2 cases < 4 ng/ml. Transrectal ultrasound was performed in 10 patients，and prostate volumes were ranging from 29.48 to 109.78 cm3，with 6 cases > 45 cm3. All 12 patients underwent MRI，and all demonstrated PI-RADS scores ≥ 4，typically presenting as low signal intensity on T2-weighted imaging，high signal on diffusion-weighted imaging（DWI），and low apparent diffusion coefficient（ADC）values. Contrast-enhanced MRI in 8 cases revealed heterogeneous enhancement. One patient underwent 68Ga-prostate-specific membrane antigen positron emission tomography-computed tomography（ 68Ga-PSMA PET-CT），which showed band-like increased uptake in the central zone. All 12 patients were preoperatively suspected of prostate cancer，of whom 10 underwent transrectal biopsy and 2 underwent transperineal biopsy. Pathological characteristics and follow-up results were analyzed. Treatment outcomes were analyzed，The International Prostate Symptom Score（IPSS），quality of life（QOL）score，maximum urinary flow rate（Q max），and post-void residual urine（PVR）volume were compared before and 1 month after treatment. Results:Histopathology confirmed GP in all cases，with chronic inflammation in 11 cases and acute inflammation in 1 case. Immunohistochemistry demonstrated positivity for CD68（macrophage marker），high-molecular weight cytokeratin（HCK），and reticulin staining；periodic acid-Schiff（PAS）and acid-fast staining were positive in 2 cases，corresponding to 1 patient with a prior history of pulmonary tuberculosis and 1 with testicular tuberculosis. Two patients underwent thulium laser enucleation of the prostate，while 10 received conservative treatment，including 2 patients with tuberculosis infection who were referred for anti-tuberculosis therapy and 8 patients treated with oral tamsulosin 0.2 mg once daily. Follow-up was completed in 10 patients：9 were followed for 1 ? 3 months（mean 2.4 months），and 1 patient was followed for 9 years before being diagnosed with prostate cancer. Two additional patients，whose pathological findings suggested a possible diagnosis of tuberculous granulomatous prostatitis，were advised to undergo anti-tuberculosis treatment at another hospital and were subsequently lost to follow-up. Among the 2 patients who underwent thulium laser enucleation，IPSS decreased from 26 and 25 to 6 and 5 respectively，QOL scores decreased from 6 and 5 to 1 and 0 respectively，Q max increased from 4.5 and 4.3 ml/s to 23.0 and 21.9 ml/s respectively. In the 8 patients treated conservatively，IPSS decreased from 18.45±7.17 to 14.45±5.03，and QOL score decreased from 5.09±1.04 to 4.09±0.70 at 1 month after treatment，showing significant improvement（ P < 0.05）. Additionally，one patient initially diagnosed with GP and managed conservatively remained stable for 9 years，but subsequently developed urinary retention and underwent thulium laser enucleation，with postoperative pathology confirming prostate cancer. Conclusions:Clinical manifestations of GP are nonspecific，and the condition can easily be mistaken for prostate cancer due to elevated PSA levels and PI-RADS scores ≥4. Some patients may present with acute urinary retention，but definitive diagnosis still relies on prostate biopsy and immunohistochemistry. Treatment should be individualized according to the underlying etiology，with medication as the mainstay，while transurethral surgical intervention may be considered in cases with obstruction. Although GP is a benign lesion，its potential association with prostate cancer warrants vigilance and emphasizes the importance of long-term follow-up.