Background Work-related musculoskeletal disorders (WMSDs) are considered to be one of the biggest health problems in the workplace, seriously affecting the productivity and quality of life of the working population. Long working hours may associate with WMSDs, and leisure-time physical activity (LTPA) is beneficial for WMSDs. However, the independent and combined effects of these two factors on WMSDs remain poorly understood. Objective To explore the independent and joint relationships between long working hours, leisure time physical activity (LTPA), and WMSDs, and to provide a basis for prevention and intervention of WMSDs. Methods A cross-sectional survey was conducted among 1227 frontline workers from multiple secondary industry companies in Nanchong City in 2023 using cluster random sampling. Demographic characteristics information, weekly working hours, LTPA, personal health behaviors, and occupational factors were collected through questionnaires. The Chinese version of Musculoskeletal Disorders Questionnaire was used to assess WMSDs. χ² test and logistic regression were used to analyze the relationships between long working hours and/or LTPA and WMSDs. Results A total of 1227 workers were surveyed with a mean age of (41.3±9.3) years and 855 (69.7%) were male and 372 (30.3%) were female. Among then, 855 (69.7%) workers reported working >40 h per week, and 254 (20.7%) reported working ≥ 55 h per week; 561 (45.7%) reported no LTPA and 192 (15.6%) reported high LTPA. The overall positive rate of WMSDs was 57.4%. The positive rate of WMSDs was 71.3% in those working ≥55 h per week, which was significantly higher than those in the other groups (51.3%-58.2%, P<0.05). Comparison among the positive rate of WMSDs in the weekly working 41-48 h group (54.4%), the 49-54 h group (58.2%), and the ≤40 h group (51.3%) showed no statistically significant difference (P>0.05). The positive rate of WMSDs was higher in workers with no LTPA (59.0%)/low LTPA (58.9%) than in those with high LTPA (49.0%) (P<0.05). The logistic regression models showed that after adjusting gender, age, work experience, income per month, night shift, industry, prolonged fixed posture, prolonged repetition, smoking and alcohol drinking, compared with weekly working ≤40 h, the risk of WMSDs was higher in those with extra-long working hours (≥55 h·week⁻¹ ) (OR=2.155, 95%CI: 1.504, 3.088), whereas those with high LTPA had a lower risk of WMSDs (OR=0.614, 95% CI: 0.432, 0.874 ). The combination of no LTPA and extra-long working hours (≥55 h·week⁻¹) and low LTPA and extra-long working hours (≥55 h·week⁻¹) showed associations with WMSDs, with 2.360 and 2.049 times higher risk of WMSDs than that of the combination of no LTPA and standard working hours (≤40 h ·week⁻¹) respectively (P<0.05), whereas the combination of high LTPA and long working hours was not observed statistical significance (P>0.05). Conclusion Extra-long working hours and/or LTPA show different associations with the risk of WMSDs. Extra-long working hours are significantly positively associated with the risk of WMSDs, whereas high LTPA is significantly negatively associated with the risk of WMSDs. The combination of extra-long working hours with no or low LTPA is associated with elevated risk of reporting WMSDs, whereas no statistical significance is observed for the high LTPA-long work hours combination.

Objective To explore the relationship between the polymorphism of excision repair cross-complementation group 1 (ERCC1) C8092A locus and the efficacy and prognosis of platinum-based chemotherapy for lung cancer (LC), and to provide a theoretical basis for precision treatment of LC. Methods From January 2014 to October 2017, 120 patients from two tertiary hospitals in Haikou City, and with pathologically confirmed lung cancer treated with platinum-based chemotherapy were selected as the research objects. After informed consent was obtained, peripheral blood samples were collected for DNA extraction, and the genotype of ERCC1 C8092A locus was detected by mass spectrometry. WHO's Response Evaluation Criteria in Solid Tumours (RECIST) was used to judge patients' chemotherapy efficacy and patients' survival status was obtained by telephone follow-up and other means. Results Among the 120 LC patients, the genotype frequencies of ERCC1 C8092A locus were 67 cases of CC wildtype (55.8%), 45 cases of CA heterozygous type (37.5%), and 8 cases of AA rare mutation type (6.7%), which conformed to Hardy-Weinberg equilibrium (χ2=0.140, P>0.05). The total effective rate of chemotherapy was 32.5%, with the highest effective rate in patients with the CA genotype (42.2%) at the ERCC1 C8092A locus and the lowest in patients with the CC genotype (25.4%). The overall one-year survival rate was 68.3% and the three-year survival rate was 35.8%. The patients with ERCC1 C8092A AA genotype had the lowest survival rate, with a one-year survival rate of 50.0% and three-year survival rate of only 25.0%. However, there were no statistical differences in the overall survival rate among the three genotypes of carriers of ERCC1 C8092A (χ2=0.328, P=0.849). Conclusions The polymorphism of ERCC1 C8092A locus is associated with the efficacy of platinum-based chemotherapy for LC, and patients with CA genotype have the highest efficacy. The one-year and three-year survival rates of patients with CC genotype are significantly higher than those of CA and AA genotypes.

Objective To quantitatively analyze the effects of population aging and other risk factors on the burden of colorectal cancer in China from 1990 to 2019. Methods The Global Burden of Disease Study 2019 was used to describe the temporal trend of the burden of colorectal cancer. A decomposition method established by Gupta was applied to quantify the burden related to population growth, aging, age-specific prevalence, and disease severity. Results The age-standardized disability adjusted life years (DALY) rates of colorectal cancer in China showed an overall upward trend from 1990 to 2019. The DALY in 2019 increased by 191.12% compared with that in 1990, with 34.54% of the increase attributed to population growth, 111.36% to population aging, and 77.56% to the rise of age-specific prevalence. Meanwhile, -32.54% benefited from the changes in disease severity. Diet low in milk was the primary risk factor for the disease burden of colorectal cancer in China in 2019, followed by diet low in whole grains and calcium. In the last 30 years, the corresponding risk factor of the most rapid increase in China was high BMI with an average annual percentage of change of 4.14%, and the corresponding risk factor of the most rapid decrease in China was diet low in fiber with an average annual percentage of change of -2.00%. Conclusion Aging population is mainly responsible for the considerable increase in the burden of colorectal cancer in China from 1990 to 2019. The health administrative authorities should take corresponding measures to address the adverse impacts associated with aging.

BACKGROUND:Filamin B(FLNB)can crosslink the actin cytoskeleton into a dynamic structure that is essential for the directional movement of cells.It can regulate the proliferation,differentiation and apoptosis of chondrocytes.However,the effect of FLNB on osteoblast proliferation,migration and apoptosis has not been reported. OBJECTIVE:To investigate the effect of FLNB on the proliferation,migration and apoptosis of MC3T3-E1 cells. METHODS:The adenoviral vectors for knockdown of FLNB expression(sh-FLNB1,sh-FLNB2,sh-FLNB3)were constructed and infected with MC3T3-E1 cells.After screened by puromycin drug,the efficiency of FLNB knockdown was detected by western blot and RT-PCR.The MC3T3-E1 cell line with the best efficiency of FLNB knockdown was selected as the stable transient cell line of MC3T3-E1 for subsequent experiments.The cells were divided into blank group,mc3t3 group,sh-NC group(empty vector),and sh-FLNB group(sh-FLNB lentivirus).The blank group was cultured in cell-free α-MEM complete medium;the mc3t3 group was cultured in α-MEM complete medium alone;and the sh-NC and sh-FLNB groups were cultured with α-MEM medium containing 2.5 μg/mL puromycin.After 3 days of culture,cell counting kit-8 assay and cell scratch assay were used to detect the proliferation and migration ability of MC3T3-E1;flow cytometry was used to detect cell apoptosis;and RT-PCR was used to detect the expression of apoptosis-related genes. RESULTS AND CONCLUSION:Western blot and RT-PCR results showed that the efficiency of FLNB knockdown was the best in the sh-FLNB3(P<0.000 1),which was used as a stable cell line for subsequent experiments.Cell counting kit-8 data showed that the proliferative ability of MC3T3 cells was significantly weakened after knockdown of FLNB(P<0.05).Cell scratch assay results showed that the migration ability of MC3T3 cells was significantly decreased after knockdown of FLNB.Flow cytometry and RT-PCR results showed that the apoptotic rate of MC3T3-E1 cells increased after knockdown of FLNB,the expression of pro-apoptotic factor Bax increased significantly,and the expression of anti-apoptotic factor Bcl-2 decreased significantly(P<0.05).To conclude,knockdown of FLNB can reduce the proliferation ability of MC3T3-E1 cells,decrease the migration ability of the cells,and increase cell apoptosis.

BACKGROUND:Currently,there is no drug that can completely cure osteoarthritis and its pathogenesis is still unclear.Circular RNAs(circRNAs)are differentially expressed in patients with osteoarthritis and are closely associated with various pathological processes in osteoarthritis.circRNAs play an important role in various physiological and pathological processes,such as chondrocyte homeostasis,extracellular matrix formation,and inflammatory response. OBJECTIVE:To mainly review the effects of circRNAs on pathological factors related to osteoarthritis,as well as the types and expression levels of circRNAs in osteoarthritis. METHODS:Related articles published from 1976 to August 2023 were retrieved from CNKI,WanFang,VIP,PubMed,Medline,Web of Science and Elsevier databases.The keywords were"osteoarthritis,circular RNA,non-coding RNA,synovial tissue,chondrocytes"in Chinese and English,respectively.All the relevant articles were screened,summarized,analyzed,and finally 69 papers were included in the review. RESULTS AND CONCLUSION:circRNAs are non-coding RNAs widely found in eukaryotic cells,with covalently closed continuous loop structure,but with no 5'hat structure and 3'poly A tail,which are involved in multi-gene and multi-target regulatory networks and cannot be degraded by nucleic acid exonucleases(RNase R).circRNAs have a high abundance,high conservativeness and stability,and cell and tissue specificity.circRNAs have biological functions such as acting as molecular sponges for miRNAs,regulating linear RNA transcription and RNA shearing,interacting with RNA-bound proteins,and translating proteins.circRNAs regulate chondrocyte apoptosis and proliferation,degradation of cartilage extracellular matrix,and inflammation and other physiopathologic processes.circRNAs are expected to become biomarkers and potential therapeutic targets for clinical diagnosis and prognosis of osteoarthritis,and may become a new strategy for clinical treatment of osteoarthritis in the future.

Objective To investigate the value of histone deacetylase 3(HDAC3)in evaluating the risk of slow/no reflow in AMI patients after PCI.Methods A total of 280 AMI patients undergo-ing PCI in our hospital from June 2020 to June 2022 were recruited,and according to TIMI blood flow grading,they were divided into slow/no reflow group(TIMI≤grade 11,n=54)and normal flow group(TIMI＞grade Ⅱ,n=226).The demographic characteristics,underlying diseases,baseline data at admission,and preoperative results of coronary angiography and laboratory tests were compared between the two groups.Multivariate logistic regression analysis was used to determine the influencing factors for slow/no reflow in AMI patients after PCI,and ROC curve was drawn to analyze the predictive value of related indicators for slow/no reflow.Results Obvi-ously larger proportions of smoking history and Killip grade Ⅱ,higher heart rate,longer reperfu-sion time,and higher serum levels of LDL-C,NLR,D-D and HDAC3 were observed in the slow/no reflow group than the normal flow group(P＜0.05,P＜0.01).Multivariate logistic regression analysis showed that reperfusion time,NLR and HDAC3 were influencing factors for slow/no reflow in AMI patients after PCI(P＜0.05,P＜0.01).The AUC value of reperfusion time+NLR in predicting the slow/no reflow after PCI in AMI patients was 0.798(95％CI:0.664-0.922,P=0.002),with a sensitivity and specificity of 0.87 and 0.73,respectively.And when serum HDAC3 level was combined in the prediction,the AUC value was 0.903(95％CI:0.790-0.922,P＜0.01),with a sensitivity and specificity of 0.93 and 0.84,respectively.Conclusion Preoperative HDAC3 level is an influencing factor for slow/no reflow in AMI patients after PCI.Based on reperfusion time and NLR,combination of the 3 indicators can provide additional predictive value for slow/no reflow in these patients.

Objective:To understand the epidemiological characteristics and trends of injury in older adults in Jiangsu Province from 2006 to 2022 and provide a scientific basis for developing prevention and control measures.Methods:The data on injury cases aged 60 and older were collected from 12 sentinel hospitals in Jiangsu Province during 2006-2022. The study analyzed the proportion of injury cases among the elderly in the overall population and calculated the annual percent change and average annual percent change (AAPC). A pairwise comparison between groups was performed, and the differences were judged according to the adjusted standardized residuals.Results:From 2006 to 2022, there were 218 426 injury cases among individuals aged 60 and older in Jiangsu Province, which accounted for an increasing proportion of injury cases within the entire population (AAPC=3.17%, P<0.001). The first five causes of elderly injury were falls (42.06%), road traffic injuries (20.20%), animal injuries (11.45%), knife/sharp injuries (9.43%), and blunt injuries (8.13%). From 2006 to 2022, the proportion of falls, animal injuries, and knife/sharp injuries among the elderly aged ≥60 showed an increasing trend, while the proportion of road traffic injuries and blunt injuries decreased (all P<0.001). The incidence of injury was highest in October, with a daily incidence peak between 8:00 and 10:00. Leisure activities (40.34%) were the major activity leading to injury. The injury occurred mainly at home (53.74%), and the injury intention was mainly unintentional (97.41%), all of which showed an increasing trend ( P<0.001). The injuries were mainly bruises (36.00%), and the most common injured positions of the body were low limbs (27.55%), all of which showed a decreasing trend ( P<0.001). About 69.80% of cases were slight, and 79.38% were discharged after treatment, which showed an increasing trend ( P<0.001). Conclusions:The injury data for individuals aged 60 and older in Jiangsu Province exhibited varying trends from 2006 to 2022. There was a noticeable increase in the proportion of elderly injury cases within the overall injury population, as well as an upward trend in falls, animal injuries, and knife/sharp injuries as leading causes of injury. It is imperative to actively develop prevention measures based on the epidemiological characteristics and evolving trends of elderly injuries in Jiangsu Province.

Objective:To explore the genetic basis and clinical phenotype of a Chinese pedigree affected with Focal segmental glomerulosclerosis (FSGS).Methods:A male patient who was admitted to the First Affiliated Hospital of Zhengzhou University on July 26, 2018 was selected as the study subject. Clinical data of the patient was collected. Next generation sequencing and Sanger sequencing were carried out to detect the variant sites. Bioinformatic software was used to simulate the effect of candidate variants on the protein functions.Results:Ultrasound exam of the patient showed enhanced echo for the renal parenchyma. Kidney biopsy had confirmed the pathological diagnosis of FSGS (non-specific). Electronic microscopy displayed segmental sclerosis of the glomeruli, mild hyperplasia of mesangial cells and matrix. The proband was found to harbor two novel variants of the PLCE1 gene, namely c. 3199delA (p.N1067Mfs*15) and c.4441_4443delATC (p.1481_1481del), which were respectively inherited from his mother and father. Based on the guidelines from the American College of Medical Genetics and Genomics (ACMG), both variants were rated as pathogenic (PVS1+ PM2_Supporting+ PP3; PM2_Supporting+ PM3+ PP3). Bioinformatic simulation suggested that both variants could significantly affect the tertiary structure of the PLCE1 protein. Conclusion:The c. 4441_4443delATC and c. 3199delA variants of the PLCE1 gene probably underlay the pathogenesis of the FSGS in this pedigree.