Background The prevalence of chronic diseases among the Chinese occupational population is rising steadily, with hypertension and diabetes becoming important health concerns. Occupational health examinations (OHE) provide stable population coverage, standardized protocols, and fixed follow-up intervals, offering a robust data foundation for risk assessment. However, most existing hypertension prediction studies rely on cross-sectional data and mainly focus on clinic onset, failing to capture the dynamic progression and cumulation of individual risk. Objective To construct a machine learning-based risk prediction model for blood pressure abnormality in occupational populations, providing a reference for health risk stratification and targeted health interventions. Methods Longitudinal data from 2020 to 2023 were extracted from the occupational health examination database of an institution in Shanghai. After excluding individuals with hypertension in any of the first three years, 3710 workers who participated 4 consecutive years of OHE were included. Six categories of blood pressure-related indicators from 2020 to 2022 were selected, including basic information, lifestyles, occupational exposures, cardiovascular indicators, routine blood tests, and biochemical markers, comprising 30 variables in total. For feature engineering, continuous variables were processed to reflect three-year dynamic characteristics: level (mean), variability (variance), and temporal trend (slope). Categorical variables were incorporated using 2022 values. Least absolute shrinkage and selection operator regression was applied to identify variables for inclusion in the machine learning models. Five models (decision tree, logistic regression, random forest, support vector machine, and XGBoost) were employed to predict blood pressure abnormality risk in 2023. And then sensitive analysis was conducted. The optimal model was selected based on the area under the curve (AUC) of receiver operating characteristic. Feature importance and SHAP analyses were applied to interpret the final model. Results Feature engineering transformed 17 continuous variables into 51 secondary variables, combined with 13 baseline variables, resulted in 24 variables screened out by LASSO regression. The logistic regression model achieved the best performance. Feature importance analysis indicated that the dynamic trajectory of blood pressure played a central role in the model, complemented by other biochemical and lifestyle indicators. SHAP analysis further showed that the model’s ability to not only identify risks of high-normal blood pressure and hypertension but also quantify the specific contribution of individual examination indicators to predicted risk, supporting risk-stratified population management in occupational health management. Conclusion Based on an existing occupational health examination database and routinely collected data, this study has developed a risk prediction model for blood pressure abnormalities in occupational populations. By incorporating dynamic change characteristics from longitudinal examinations, the study demonstrates the feasibility of using routine health data for early risk identification and stratified management. However, its applicability is limited by the availability of repeated examination data and the focus on specific occupational groups, requiring further validation across broader populations and diverse clinic scenarios.

As a primary approach to safeguarding workers' occupational health in China, the work-related injury insurance still has insufficient preventive measures for occupational groups. By reviewing the preventive measures embedded in Germany’s statutory accident insurance (Gesetzliche Unfallversicherung) and Japan’s workers’ accident compensation insurance, this study summarized their best practices and then proposed the following policy directions based on China’s specific context: strengthening the prevention-oriented institutional framework, increasing financial investment in occupational injury prevention, improving the incentive mechanisms of floating premium rate, and promoting data integration and intelligent applications in occupational health management. These measures are expected to shift China’s work-related injury insurance system from a compensation-oriented model to one that emphasizes comprehensive prevention and health promotion, thereby providing useful insights for better safeguarding the health of Chinese workers.

ObjectiveTo clarify the anti-inflammatory and lung-protective effects of Yantiao prescription on lipopolysaccharide （LPS）-induced acute lung injury （ALI）， and to explore the impact of Yantiao prescription on the metabolic pathways of arachidonic acid （AA） in vivo. MethodsThirty male C57BL/6J mice were randomly divided into the following groups based on body weight： normal group， model group， dexamethasone group （2 mg·kg^-1）， low-dose Yantiao prescription group （18 g·kg^-1）， and high-dose Yantiao prescription group （36 g·kg^-1）， with 6 mice in each group. The ALI mouse model was established by intraperitoneal injection of LPS. The treatment groups received oral gavage once a day for 7 consecutive days， and serum and lung tissue were collected at the end of the experiment. The content of pro-inflammatory cytokines tumor necrosis factor-α （TNF-α）， interleukin-1β （IL-1β）， and interleukin-6 （IL-6） in serum was detected by enzyme-linked immunosorbent assay （ELISA）. Hematoxylin-eosin （HE） staining was used to assess lung tissue pathology. The wet/dry weight ratio （W/D） and myeloperoxidase （MPO） activity in lung tissue were measured. The content of AA metabolites in serum and lung tissue was measured by liquid chromatography triple quadrupole-mass spectrometry （LC-MS/MS）. ResultsCompared with the conditions in the normal group， the content of serum pro-inflammatory cytokines TNF-α， IL-1β， and IL-6 in the model group was significantly increased （P<0.01）. The alveolar structure in mice was severely damaged， with markedly thickened alveolar walls and extensive inflammatory cell infiltration. The W/D ratio and MPO activity in lung tissue were significantly increased （P<0.01）. The content of AA metabolites， including prostaglandin D₂ （PGD₂）， prostaglandin E₂ （PGE₂）， 11（S）-hydroxy-eicosatetraenoic acid ［11（S）-HETE］， and 5-hydroxy-eicosatetraenoic acid （5-HETE） in serum and lung tissue was significantly increased （P<0.05）， while the content of 11，12-epoxyeicosatrienoic acid （11，12-EET） and 14，15-epoxyeicosatrienoic acid （14，15-EET） in serum was significantly decreased （P<0.01）. Compared with the results in the model group， the content of serum pro-inflammatory cytokines TNF-α， IL-1β， and IL-6 in the dexamethasone group， low-dose Yantiao prescription group， and high-dose Yantiao prescription group was significantly reduced （P<0.05）. Mild thickening of alveolar walls， scattered inflammatory cell infiltration， and relatively intact tissue structure with improved alveolar architecture were observed. The W/D ratio and MPO activity in lung tissue were significantly reduced （P<0.01）. The content of AA metabolites PGD₂， PGE₂， 11（S）-HETE， and 5-HETE in serum from the dexamethasone group was significantly decreased （P<0.05）， while the content of 14，15-EET in serum significantly increased （P<0.01）， and the content of 5-HETE in lung tissue significantly decreased （P<0.01）. In the low-dose and high-dose Yantiao prescription groups， the content of AA metabolites PGD₂， PGE₂， 11（S）-HETE， and 5-HETE in serum and lung tissue was significantly decreased （P<0.05）， while the content of 11，12-EET in both serum and lung tissue was significantly increased （P<0.05）. ConclusionYantiao prescription has significant protective effects against LPS-induced ALI， which are related to its regulation of AA metabolic pathways in vivo.

The transition of cancer cells from epithelial state to mesenchymal state awarded hepatocellular carcinoma (HCC) stem cell properties and induced tumorigenicity, drug resistance, and high recurrence rate. Reversing the mesenchymal state to epithelial state by inducing mesenchymal-epithelial remodeling could inhibit the progression of HCC. Using high-throughput screening, chrysin was selected from natural products to reverse epithelial-mesenchymal transition (EMT) by selectively increasing CDH1 expression. The target identification suggested chrysin exerted its anti-HCC effect through covalently and specifically binding threonine 205 (Thr205) of alpha-enolase (ENO1). For the first time, we revealed that ENO1 bound β-catenin mRNA, and recruited YTHDF2 to identify the m6A modified β-catenin in the 3'-UTR region to degrade β-catenin mRNA. Eventually, the CDH1 gene expression was improved through the regulation of β-catenin mRNA. ENO1/β-catenin mRNA interaction might be a promising target for cellular plasticity reprogramming. Moreover, chrysin could mediate mesenchymal‒epithelial remodeling through increasing degradation of β-catenin mRNA by promoting the binding of ENO1 and β-catenin mRNA. To the best of our knowledge, chrysin is the first reported small molecule inducing β-catenin mRNA degradation through binding to ENO1. The water-soluble derivative of chrysin may be a natural product-derived lead compound for circumventing metastasis, recurrence, and drug resistance of HCC by mediating mesenchymal‒epithelial remodeling.

As the prevalence of chronic diseases increases among occupational populations in China, the focus of occupational health management has shifted from ″occupational disease prevention and control″ to ″occupational disease and chronic disease prevention and control″. At present, occupational medical examinations (OME) are mainly focused on occupational disease prevention and control, and generally lack of chronic disease indicators such as blood lipids and blood glucose, limiting the role of OME in life-cycle health management of workers. To address this gap, it is necessary to incorporate chronic disease screening indicators into OME. Integrating OME and chronic disease screening faces bottlenecks, including concerns about increased operating costs in small- and medium-sized enterprises, and the risk of employment discrimination caused by the leakage of employee health privacy. A tiered strategy is recommended. Incorporating low-cost indicators such as blood lipids, waist circumference into routine examinations, and customizing advanced screening for elder or high-risk position workers. The prioritization of screening indicators can be determined by expert consultation and employer-employee discussions. Meanwhile, the results of chronic disease screening indicators should not be included in occupational health surveillance records to protect workers′ privacy. In summary, expanding OME to cover more chronic disease indicators provides valuable economic and social benefits. In the long run, common chronic disease screening indicators should be included in the regular medical examination indicators of OME, thereby reducing the burden of chronic diseases on occupational populations and promoting the health management of occupational populations.

Objective:To investigate the prevalence and genotype distribution of human papillomavirus (HPV) infection in the anorectal region among human immunodeficiency virus (HIV)-positive men who have sex with men (MSM) in Shenzhen, and explore the differences between HIV-positive and HIV-negative MSM populations, providing scientific evidence for HPV screening, vaccination, and related disease prevention.Methods:A total of 100 MSM recruited from the Department of Dermatovenerology of the Third People′s Hospital of Shenzhen between 2023 and 2024 were included. Questionnaire collected sociodemographic and clinical characteristics. Anorectal exfoliated cells were analyzed for HPV genotyping, and blood samples were tested for HIV antibodies and T lymphocyte subsets. Chi-square test was used to assess associations between qualitative variables. Results:Among 100 MSM, 58 were HIV-positive and 42 HIV-negative. The overall HPV infection rate was 93.10% (54/58) in HIV-positive MSM, with high-risk HPV at 79.31% (46/58) and low-risk HPV at 75.86% (44/58). The predominant genotypes were HPV6, 11, 16, 52, 18, 59, and 68. In HIV-negative MSM, HPV infection rate was 95.24% (40/42), with high-risk HPV at 57.14% (24/42) and low-risk HPV at 92.50% (37/40), dominated by HPV6, 11, 16, 51 and 52. HIV-positive MSM showed significantly higher infection rates of high-risk HPV16/18 ( P=0.032), HPV58 ( P=0.020), HPV59 ( P=0.031), and HPV68 ( P=0.007) compared to HIV-negative MSM. The maximum number of concurrent HPV infections was 12 in HIV-positive MSM versus 4 in HIV-negative MSM. Multivariate analysis revealed that HIV-positive MSM with CD4/CD8 ratio≤0.9 had significantly higher HPV positivity ( P<0.05). Conclusions:HIV-positive MSM exhibit elevated rates of high-risk and multiple HPV infections, closely associated with immune dysfunction. Strengthened HPV screening, vaccination, and immune status management are critical for preventing HPV-related malignancies in the population.

Objective To investigate the effects of different contrast injection schemes on the image quality of triple-rule-out com-puted tomography angiography(TRO-CTA).Methods A total of 691 patients with acute chest pain who underwent TRO-CTA exami-nation from multiple centers were prospectively selected and randomly divided into mixed group and unmixed group according to dif-ferent contrast injection methods.The image quality of aorta,pulmonary artery and coronary artery in the two groups was evaluated subjectively and objectively and the radiation dose was calculated.Results There were no significant differences in subjective image quality scores,aorta and coronary CT values,signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)between the two groups(P>0.05),while there were significant differences in pulmo-nary CT values,SNR,CNR and radiation dose between the two groups(P<0.05).Conclusion The utilization of a mixed contrast injection scheme in TRO-CTA can satisfy diagnostic require-ments while ensuring a low proportional dosage and reduced radiation dose,which has clinical application value.

Objective:To investigate the effect of brinzolamide-timolol maleate eye drops on the metabolism of intravitreally injected vancomycin hydrochloride (VH) in rabbit eyes.Methods:Nine healthy male New Zealand white rabbits were selected.Among them, three were used to extract blank aqueous humor and the right eyes of the remaining six were set as experimental eyes.The experimental eye was topically administered 30 μl of brinzolamide-timolol maleate eye drops twice a day.The fellow eyes were set as control eyes.The intraocular pressure of both eyes was measured before the initial application of the eye drops and 1 hour after application of the eye drops next day.Both eyes of each rabbit were intravitreally injected with 0.5 mg of VH (10 mg/ml) solution.The aqueous humor was drawn at 2 hours and 1, 2, 4, 6, 8, 10 and 12 days after intravitreal injection.VH concentrations in aqueous humor were measured by high performance liquid chromatography.The time of peak concentrations ( tmax), peak concentration ( Cmax), elimination half-life ( t1/2) and the area under the concentration-time curve ( AUC) of VH in rabbit eyes were calculated by the average concentrations.This study was approved by the Ethics Committee of Henan Eye Hospital (No.HNEECA-2023-01). Results:The intraocular pressure after eye drop was significantly lower than that before eye drop in experimental eyes ( P<0.01).The tmax of VH in experimental eyes and control eyes were both 1 day.The Cmax of VH in experimental eyes and control eyes were (61.40±13.48) and (51.56±5.07)μg/ml, respectively.The VH aqueous concentrations in the experimental eyes on days 4, 6 and 8 after injection were all significantly higher than those in the control eye ( t=2.378, 3.150, 2.694; all P<0.05).The t1/2 of VH in the aqueous humor of the experimental eyes was 2.69 days, which was 31% longer than 2.05 days of the control eyes.The AUC0-10 d of experimental eyes increased by 24.3% relative to the control eyes. Conclusions:Brinzolamide-timolol maleate eye drops can significantly extend the ocular residence time of intravitreally injected VH.

Objective:To compare the effects of brinzolamide-timolol (B&T) eye drops and dipivefrine hydrochloride (DH) eye drops on the intraocular metabolism of ranibizumab after intravitreal injection in rabbit.Methods:Eighteen New Zealand white rabbits were randomly and equally divided into DH group, B&T group, and control group.The right eye was selected as the experimental eye.The B&T and DH groups received DH and B&T eye drops, respectively, twice daily, 30 μl each time.The control group did not receive any treatment.Intraocular pressure (IOP) was measured in both eyes before the first administration and 1 hour after the first administration on the second day.After IOP measurement, the experimental eye received an intravitreal injection of 0.25 mg ranibizumab (10 mg/ml).Aqueous humor samples were collected 1, 3, 7, 10, 14, 21 and 28 days after injection.Ranibizumab concentration in the aqueous humor was measured by ELISA kit.Pharmacokinetic parameters including time to peak concentration ( tmax), peak concentration ( Cmax), elimination half-life ( t1/2) and area under the concentration-time curve (AUC) of ranibizumab were calculated.This experiment was approved by the Ethics Committee of Henan Eye Hospital (No.HNEECA-2023-03). Results:The tmax of ranibizumab in the aqueous humor was 1 day in all three groups.The Cmax values in the control, B&T and DH groups were (8.122±2.445), (13.079±3.140) and (8.299±0.899)μg/ml, respectively.Except for day 3 in the control group, the ranibizumab concentrations in aqueous humor of the B&T group were higher than that of the DH group and the control group at all time points after injection, with statistically significant significances (all P<0.05).The t1/2 of ranibizumab in aqueous humor in the control group, B&T group, and DH group were (2.90±0.29), (3.36±0.35) and (2.80±0.29) days, respectively, and the AUC0-t values were (52.697±10.178), (80.244±11.249) and (51.985±8.734)μg/ml·d, respectively.The t1/2 and AUC0-t of ranibizumab in aqueous humor of the B&T group were significantly higher than those of the DH group and the control group, and the differences were statistically significant (all P<0.05).The mean bioavailability in the B&T group was increased by 52.3% compared to the control group. Conclusions:B&T eye drops prolong the half-life and enhance the intraocular bioavailability of ranibizumab after intravitreal injection in rabbits, whereas DH has no significant effect on its intraocular metabolism.

Objective:To investigate the effect of brinzolamide-timolol maleate eye drops on the metabolism of intravitreally injected vancomycin hydrochloride (VH) in rabbit eyes.Methods:Nine healthy male New Zealand white rabbits were selected.Among them, three were used to extract blank aqueous humor and the right eyes of the remaining six were set as experimental eyes.The experimental eye was topically administered 30 μl of brinzolamide-timolol maleate eye drops twice a day.The fellow eyes were set as control eyes.The intraocular pressure of both eyes was measured before the initial application of the eye drops and 1 hour after application of the eye drops next day.Both eyes of each rabbit were intravitreally injected with 0.5 mg of VH (10 mg/ml) solution.The aqueous humor was drawn at 2 hours and 1, 2, 4, 6, 8, 10 and 12 days after intravitreal injection.VH concentrations in aqueous humor were measured by high performance liquid chromatography.The time of peak concentrations ( tmax), peak concentration ( Cmax), elimination half-life ( t1/2) and the area under the concentration-time curve ( AUC) of VH in rabbit eyes were calculated by the average concentrations.This study was approved by the Ethics Committee of Henan Eye Hospital (No.HNEECA-2023-01). Results:The intraocular pressure after eye drop was significantly lower than that before eye drop in experimental eyes ( P<0.01).The tmax of VH in experimental eyes and control eyes were both 1 day.The Cmax of VH in experimental eyes and control eyes were (61.40±13.48) and (51.56±5.07)μg/ml, respectively.The VH aqueous concentrations in the experimental eyes on days 4, 6 and 8 after injection were all significantly higher than those in the control eye ( t=2.378, 3.150, 2.694; all P<0.05).The t1/2 of VH in the aqueous humor of the experimental eyes was 2.69 days, which was 31% longer than 2.05 days of the control eyes.The AUC0-10 d of experimental eyes increased by 24.3% relative to the control eyes. Conclusions:Brinzolamide-timolol maleate eye drops can significantly extend the ocular residence time of intravitreally injected VH.