Objective To explore the wearing status and actual noise reduction effect of hearing protectors among noise workers in a typical automobile manufacturing enterprise. Methods In April 2024, an occupational hazard factor testing was carried out in an automobile manufacturing industry, and at the same time, the hearing protection fit test was conducted for noise workers. Intervention and guidance were provided to those who did not pass the minimum standard of baseline PAR. The difference in PAR between baseline and post-intervention was compared, and the effectiveness of hearing protector wearing method training was evaluated. Results The exceeding rate of the company's noise operation post was 50.77% (66/130). The baseline PAR of the subjects with working experience of less than 15 years and wearing hearing protectors throughout noisy work was higher, and the differences were statistically significant (P<0.05). Compared with those with 80dB≤L_{EX, 8h}<85dB, more research subjects with L_{EX, 8h}≥85dB failed baseline PAR (39.13%). After intervention, the PAR of the subjects who did not pass the minimum standard of baseline PRA increased from 2.0 (0.0, 5.3) to 17.0 (14.8, 20.0), and the protection level was significantly improved, and the difference was statistically significant (P<0.01). Conclusion The individual fit test of hearing protector is an important means to evaluate the actual noise reduction level of hearing protector and guide the selection of hearing protection models. Corporate training can help improve the PAR of hearing protectors.

Objective: To analyze the impact of premature death due to four major chronic diseases on life expectancy in Yangpu District, Shanghai Municipality from 2010 to 2021, so as to provide the evidence for formulating chronic disease prevention and control strategies. Methods : Mortality data of registered residents in Yangpu District from 2010 to 2021 were collected through the Death Information Registration and Management System of the Shanghai Municipal Disease Control and Prevention Information Management Platform. The premature death probability of malignant tumors, diabetes, cardiovascular and cerebrovascular diseases, and chronic respiratory diseases, and life expectancy of residents were calculated using the abridged life table method. Trends in premature death probability for four types of chronic diseases were analyzed using the average annual percent change (AAPC). The impact of premature death probability due to four chronic diseases on life expectancy was assessed by Arriaga's decomposition method. Results : The premature death probability due to four major chronic diseases in Yangpu District decreased from 9.88% in 2010 to 9.22% in 2021, showing an overall declining trend (AAPC=-0.540%, P<0.05). Among females, the premature death probability declined from 6.71% to 4.90% (AAPC=-2.715%, P<0.05), whereas no statistically significant trend was observed in males (P>0.05). Life expectancy increased from 82.52 years in 2010 to 84.50 years in 2021, with an overall upward trend (AAPC=0.244%, P<0.05). Life expectancy rose by 1.71 years for males and 2.34 years for females (AAPC=0.197% and 0.303%,both P<0.05). Declines in premature death probability from malignant tumors (AAPC=-0.967%, P< 0.05) and chronic respiratory diseases (AAPC=-3.071%, P<0.05) contributed to gains in life expectancy of 0.30 years and 0.03 years, with contribution rates of 12.18% and 1.29%, respectively. Changes in premature death probability due to diabetes as well as cardiovascular and cerebrovascular diseases were not statistically significant (both P>0.05), resulting in reductions in life expectancy of 0.05 years and 0.10 years, with contribution rates of -2.40% and -5.05%, respectively. Notably, an increase in premature death probability due to cardiovascular and cerebrovascular diseases among males (AAPC=1.673%) contributed to a decrease of 0.22 years in male life expectancy, whereas a decrease among females (AAPC=-3.824%) contributed to an increase of 0.03 years in female life expectancy, with contribution rates of -13.03% and 1.14%, respectively. Conclusions From 2010 to 2021, Yangpu District experienced an overall decline in premature death probability due to four major chronic diseases and an increase in life expectancy. Greater attention should be paid to the negative impacts of premature death probability from diabetes as well as cardiovascular and cerebrovascular diseases among males on life expectancy.

Objective To analyze the increase in hearing thresholds in different frequency bands of workers exposed to different characteristic noises and the influencing factors of binaural high-frequency hearing loss, and to provide theoretical support for occupational health monitoring in enterprises. Methods In 2021, noise-exposed workers were selected from typical noise-exposing enterprises as research subjects, and their occupational health examination data were tracked for three consecutive years. According to the on-site detection from 2021 to 2023, the cumulative noise exposure (CNE) was calculated. The chi-square test was used to compare the increase of the hearing threshold of workers exposed to different characteristic noises in different frequency bands. A generalized estimation equation was constructed to explore the influencing factors of high-frequency hearing loss in the research subjects. Results The age of the study subjects was 23-54 years old, with 1.6-20.1 years of working experience, mainly distributed in manufacturing workshops, technical workshops and public works workshops. The median LAeq,8h was 85.90 (84.5, 86.1) dB(A), and the average CNE was 94.3±2.6 dB(A). The number of people with increased hearing thresholds in each frequency band was 0.5kHz>6kHz>4kHz>3kHz>1kHz>2kHz. There were statistically significant differences in the increase of hearing thresholds in each frequency band, binaural speech frequency impairment, and high-frequency hearing loss among subjects with different characteristics (P<0.05). The detection rate of binaural speech frequency hearing loss was the highest in subjects aged>45 years, with a length of service of>15 years, and with a CNE>96dB(A). The detection rate of binaural high-frequency hearing loss was the highest in subjects aged 35-40 years, with a length of service of 5-10 years, and with a CNE>96dB(A).In addition, the detection rate of binaural speech frequency and high-frequency hearing loss increased with the increase of CNE(P<0.05). The GEE model showed that age>40 years and CNE>96dB(A) were risk factors for high-frequency hearing loss in both ears. Conclusion With increasing age and CNE, hearing thresholds rise across all frequency bands, elevating the risk of binaural speech-frequency and high-frequency hearing loss, thereby increasing the likelihood of occupational noise-induced deafness.

This study aimed to investigate the effects of acupuncture on dynamic changes in Ca²⁺, Na⁺, and H₂O₂ flux following eccentric exercise-induced muscle injury. The total of 324 healthy male Wistar rats were randomly divided into 6 groups: control group (C), eccentric exercise group (E), eccentric exercise with acupuncture group (EA), EA with TRP channel blocker group (EAT), EA with NOX2 blocker group (EAN) and EA with placebo group (EAP). Gastrocnemius muscles were subject to lengthening contractions with percutaneous electrical stimulation, followed by immediate pretreatment with blocking agents. After 30 min, acupuncture needling was administered to the gastrocnemius muscle, and real-time dynamic changes of Ca²⁺, Na⁺ and H₂O₂ flux were measured with non-invasive micro-test technique during the needle retention period, immediately, 3 h, 6 h, and 24 h post-extraction respectively. Results showed that compared with the E group, acupuncture significantly increased net Ca²⁺ efflux (P < 0.05), extended the period of net Na⁺ influx, and significantly decreased net H₂O₂ efflux (P < 0.05). However, these effects were significantly attenuated in the EAT and EAN groups, where excessive net H₂O₂ efflux was observed (P < 0.001). These findings indicate that acupuncture regulates the dynamic changes of Ca²⁺, Na⁺ and H₂O₂ flux by activating the TRP channels and interacting with NOX2 activity following eccentric exercise-induced skeletal muscle injury.
Animals ; Muscle, Skeletal/metabolism* ; Rats, Wistar ; Rats ; Male ; Calcium/metabolism* ; Hydrogen Peroxide/metabolism* ; Physical Conditioning, Animal ; Sodium/metabolism* ; Acupuncture Therapy ; NADPH Oxidase 2

The study aims to elucidate the existence forms(original constituents and metabolites) of Notoginseng Radix et Rhizoma in rats and reveal its metabolic pathways. After Notoginseng Radix et Rhizoma was administered orally once a day for seven consecutive days to rats, all urine and feces samples were collected for seven days, while the blood samples were obtained 6 h after the last administration. Using the ultra high performance liquid chromatography-quadrupole time-of-flight tandem mass spectrometry(UHPLC-Q-TOF-MS/MS) technique, this study identified 6, 73, and 156 existence forms of Notoginseng Radix et Rhizoma in the rat plasma, urine, and feces samples, respectively. Among them, 101 compounds were identified as new existence forms, and 13 original constituents were identified by comparing with reference compounds. The metabolic reactions of constituents from Notoginseng Radix et Rhizoma were mainly deglycosylation, dehydration, hydroxylation, hydrogenation, dehydrogenation, acetylation, and amino acid conjugation. Furthermore, the possible in vivo metabolic pathways of protopanaxatriol(PPT) in rats were proposed. Through comprehensive analysis of the liquid chromatography-mass spectrometry(LC-MS) data, isomeric compounds were discriminated, and the planar chemical structures of 32 metabolites were clearly identified. According to the literature, 48 original constituents possess antitumor and cardiovascular protective bioactivities. Additionally, 32 metabolites were predicted to have similar bioactivities by SuperPred. This research lays the foundation for further exploring the in vivo effective forms of Notoginseng Radix et Rhizoma.
Animals ; Rats ; Drugs, Chinese Herbal/pharmacokinetics* ; Rhizome/metabolism* ; Male ; Rats, Sprague-Dawley ; Chromatography, High Pressure Liquid ; Panax notoginseng/chemistry* ; Tandem Mass Spectrometry ; Feces/chemistry*

Objective To explore the clinical effect of active risk prevention nursing on the prevention of skin injury in patients with esophageal cancer during radiotherapy.Methods A total of 102 patients who underwent radiotherapy for esophageal cancer in Jiangsu Cancer Hospital from December 2022 to November 2023 were enrolled.They were assigned to control group(n=51,routine nursing)and study group(n=51,routine nursing+active risk prevention)according to the random number table.The skin injury,quality of life,and nursing satisfaction were compared between the two groups.Results The skin injury in the study group at 20 Gy,40 Gy and at the end of radiotherapy was significantly slighter than that in the control group(P<0.05).After 4 weeks of intervention,the total score of SF-36 and scores in all dimensions in the study group were higher than those in the control group,and the degree of nursing satisfaction in the study group was significantly higher than that in the control group(72.55%vs 94.12%,χ2=8.541,P<0.05).Conclusion Active risk prevention can reduce skin injury,improve quality of life,and help to improve nursing satisfaction in patients with esophageal cancer during radiotherapy.

Objective To investigate the antitumor effects of triptolide against CT26 colon cancer and its impact on the expression of Polo-like kinase-1(PLK-1)protein.Methods Forty clean grade BALB/c mice,each mouse was implanted with 1×106 CT26 cells into the dorsal side of the right forelimb to establish a tumor-bearing mouse model.Experimental animals were randomly divided into four groups,the tumor model group(saline control),the positive drug group[oxaliplatin,5 mg/(kg·d)],the low-dose triptolide group[50 μg/(kg·/d)],and the high-dose triptolide group[100 μg/(kg·d)].The drugs were administered through intraperitoneal injection(10 times in total,once every other day).The in vitro effects of the drugs on the proliferation,migration,invasion,and mitosis of CT26 cells were also assessed.Results Triptolide significantly inhibited the proliferation,migration,and invasion of CT26 colon cancer cells,and disrupted the separation of centrosomes and the correct arrangement of chromosomes during the prophase of mitosis in tumor cells.The binding energy of triptolide and PLK-1 protein was-7.1 kcal/mol,and it could down-regulate the expression of PLK-1 in CT26 cells.Conclusion Triptolide exerts its antitumor effects against CT26 colon cancer by downregulating the expression of PLK-1.

Objective The study aims to investigate the impact of microRNA-874-3p(miR-874-3p)regulation of plakophilin 3(PKP3)on the malignant biological behavior of lung adenocarcinoma cells and its underlying mechanism.Methods Immunohistochemistry and immunocytochemistry were used to detect the expression of PKP3 in lung adenocarcinoma tissue microarray and lung adenocarcinoma cell line A549 cells respectively,and the relationship between PKP3 and clinicopathological features of lung adenocarcinoma patients was analyzed.Select lung adenocarcinoma cell line A549,the experiment was divided into A549 cell group(blank control group),miR-NC group(transfected with miR-NC)and miR-mimics group(transfected with miR-874-3p mimics),sh-NC group(control group transfected with PKP3 silencing plasmid),sh-PKP3 group(transfected with PKP3 silencing plasmid),miR+pcDNA-PKP3 group(transfected with miR-874-3P mimics+pcDNA-PKP3,rescue group)and miR+pcDNA-NC group(transfected with miR-874-3p mimics+pcDNA-NC).The proliferation,invasion,migration and apoptosis of cells in each group were detected.ENCORI database was used to predict the upstream gene of PKP3,and dual luciferase assay was used to detect the targeting relationship between miR-874-3p and PKP3.MAPK/mTOR pathway-related proteins were detected by Western blotting.Results The expression of PKP3 in lung adenocarcinoma tissue was significantly higher than that in adjacent tissues.The high expression of PKP3 was related to clinical stage,tumor size,and lymph node metastasis(P＜0.05).Compared with the human normal lung epithelial cells(BEAS-2B),the expression of PKP3 in A549 cells increased significantly,and the expression of miR-874-3p decreased(P＜0.05).Overexpression of miR-874-3p decreased the PKP3 expression level(P＜0.05).Compared with the control group,both overexpression of miR-874-3p and silenced PKP3 inhibited the cloning and invasion ability of A549 cells,caused cell cycle arrest,and decreased the expression levels of cyclin dependent kinase 4(CDK4),cyclin D1,cyclin E1 proteins in A549 cells(P＜0.05).The expressions of Bax protein and Caspase-3 protein were up-regulated(P＜0.05),and apoptosis increased.Overexpression of PKP3 could reverse the biological behavior of overexpression of miR-874-3p.Overexpression of miR-874-3p and silencing of PKP3 significantly decreased the expressions of P38 MAPK and mTOR phosphorylated proteins.Conclusion MiR-874-3p can negatively regulate PKP3 expression and inhibit the malignant biological behavior of A549 cells through MAPK/mTOR pathway.

ObjectiveTo understand the incidence and mortality trends of acute cardiovascular and cerebrovascular events in Yangpu District of Shanghai from 2009 to 2022, and provide a basis for the prevention and control of cardiovascular and cerebrovascular events. MethodsData were obtained from the Shanghai Acute Cardiovascular and Cerebrovascular Events Surveillance Platform. Data on the incidence and mortality of cardiovascular and cerebrovascular events in the population (age group, gender) from 2009 to 2022 were collected, and the Joinpoint Regression Program version 4.9 was used to calculate the average annual percent change (AAPC) in the incidence and mortality rates of acute cardiovascular and cerebrovascular events. ResultsFrom 2009 to 2022, the crude incidence and standardized incidence rate of acute cardiovascular and cerebrovascular events in Yangpu District showed no significant changes (AAPC=1.41%, P=0.569; AAPC=-1.03%, P=0.675), the crude mortality rate of acute cardiovascular and cerebrovascular events in Yangpu District did not change significantly (AAPC=-3.04%, P=0.213), while the standardized mortality rate showed a decreasing trend (AAPC=-6.23% P=0.014). From 2009 to 2022, the crude incidence rates and age-standardized incidence rates for both males and females in Yangpu District showed no significant changes. The crude mortality trends for both genders were not significant, while the age-standardized mortality rates showed a decline (AAPC=-5.33%, P=0.029; AAPC=-7.50%, P=0.006). The incidence rate and age-standardized incidence rate were higher in males than in females. The crude incidence rates in the 30‒, 40‒, and 45‒year-old age groups increased annually (AAPC=9.13%、7.11%、4.67%, all P=0.001), and the crude mortality ratse in the 60‒, 65‒, 70‒, 75‒, 80‒, and 85‒year-old age groups declined annually (AAPC=-4.24%, P=0.044; AAPC=-5.41%, P=0.028; AAPC=-6.73%, P=0.004; AAPC=-7.46%, P=0.002; AAPC=-8.24%, P=0.002; AAPC=-6.16%, P=0.035). ConclusionFrom 2009 to 2022, the crude incidence, standardized incidence rate and crude mortality rate of cardiovascular and cerebrovascular events in Yangpu District tended to be stable, and the standardized mortality rate showed a downward trend. Men, middle-aged and young people were the key groups in the prevention and treatment of cardiovascular and cerebrovascular diseases, and it should be continued to improve the ability of medical emergency and increase the integration of medical and prevention.

Objective:To investigate the application of the parameters of multimodal ultrasound elastography in differential diagnosis for thyroid nodules of patients with diffuse thyroid lesions.Methods:A total of 103 patients with diffuse thyroid lesions who underwent treatment at Affiliated Baoji Hospital of Xi′an Medical University from January 2023 to January 2024 were retrospectively selected,whose thyroid nodules were confirmed by fine needle aspiration biopsy or surgical pathology.They were grouped according to the benign or malignant nodules.56 patients with benign nodules were included in the benign nodule group,while the other 47 patients were included in the malignant nodule group.All patients were examined by conventional ultrasound and multimodal ultrasound elastography,and the relevant parameters were recorded to compare the differences between the two groups.The value of each indicator in diagnosing benign and malignant thyroid nodules was investigated.Results:There were no statistically significant differences between the benign and malignant nodule groups in terms of gender,length diameter of nodule,nodule location,functional abnormalities of thyroid,exposure history of radiation,and the presence of acoustic halos(P＞0.05),the age of patients in the malignant nodule group was lower than that of the benign nodule group(t=-3.121,P＜0.05),and the percentage of nodules with blood flow(14.89%),the percentage of aspect ratio＜1(74.47%),and the percentage of nodules with clear boundary(27.66%)in the malignant nodule group were all lower than those of the benign nodule group,with statistically significant differences(x2=25.634,5.112,12.465,P＜0.05).The ratio of lymphatic metastasis(27.66%)and that of calcification(65.96%)in the malignant nodule group were lower than those in the benign nodule group,and the differences were all statistically significant(x2=11.917,9.350,P＜0.05).The ratios of centripetal enhancement(76.60%),inhomogeneous enhancement(68.09%),low/equal enhancement(87.23%),early obvious discharge(63.83%),unclear boundary after enhancement(91.49%),and fast discharge(59.57%)in the malignant nodule group were higher than that of the benign nodule group,and the differences were statistically significant(x2=33.409,26.695,9.079,12.853,17.798,12.649,P＜0.05),respectively.The intensity and time to peak of the malignant nodule group were respectively lower and long than these of the benign nodule group,and the differences were statistically significant(t=-12.381,4.958,P＜0.05).However,the mean passage time of the two groups was not statistically significant(P＞0.05).The maximum value,minimum value and mean value of Young's modulus,the maximum value of vertical section,mean value of vertical section,maximum value of cross section,mean value of cross section in the malignant nodule group were all higher than those in the benign nodule group,and the differences were statistically significant(t=13.997,9.100,12.191,7.616,6.310,4.679,5.355,P＜0.05).The result of receiver operating characteristic(ROC)curve analysis indicated that both ultrasonography parameters and shear wave elastography(SWE)parameters had higher diagnostic value for the benign and malignant nature of thyroid nodules in patients.The area under curve(AUC)values of intensity to peak,time to peak,and the maximum value,minimum value and mean value of Young's modulus,and the maximum value of vertical section,mean value of vertical section,maximum value of cross section,mean value of cross section were respectively 0.976,0.759,0.974,0.837,0.989,0.872,0.805,0.732 and 0.749.Conclusion:Multimodal ultrasound elastography parameters has significant application value in differential diagnosis for thyroid nodules in patients with diffuse thyroid lesions.In these parameters,the diagnostic AUC values of intensity to peak,time to peak,and the maximum value and mean value of Young's modulus are higher for malignant thyroid nodules of patients,which have higher diagnostic efficiency.It can effectively help clinical doctor to accurately identify the benign and malignant nodules for patients with diffuse thyroid lesions.