Background Work-related musculoskeletal disorders (WMSDs), as one of the major occupational health issues worldwide, have shown an increasing positive rate year by year. Due to the unique demands of work, operating room nurses exhibit a higher positive rate of WMSDs compared to other occupational groups, necessitating active attention and intervention. Objective To estimate the prevalence of WMSDs among operating room nurses in tertiary hospitals, explore the characteristics and latent categories of WMSDs, and analyze the influencing factors associated with the occurrence of WMSDs. Method Using a randomized cluster sampling method, operating room nurses from nine tertiary hospitals in Urumqi were selected as study participants between December 2023 and January 2024. Data were collected through a general information questionnaire, an ergonomic questionnaire for operating room nurses, and the Chinese Musculoskeletal Disorders Questionnaire. Latent class analysis was employed to examine the patterns of WMSDs among the nurses, while chi-square test and multinomial logistic regression were utilized to analyze the influencing factors of WMSDs. Result A total of 411 valid questionnaires were collected in this survey. The positive rate of WMSDs among operating room nurses in the tertiary hospitals of Urumqi over the past year was 91.9%. The positive rates, ordered from highest to lowest by body region, were neck (79.1%), shoulders (70.3%), and lower back (68.1%). The operating room nurses were categorized into three distinct groups by latent class analysis: multi-site pain group, neck-shoulder-back pain group, and neck and lower back pain group. The results of the multinomial logistic regression models revealed that gender, job strain level, ergonomic load level in the operating room, and exposure to cold or drafty working conditions or not were significant influencing factors for reporting WMSDs among operating room nurses. Specifically, having less than 5 years of work experience, low ergonomic load level, low job strain, and moderate job strain were identified as protective factors against WMSDs. Conversely, exposure to cold or drafty working environments and being female were identified as risk factors for WMSDs. The logistic regression models also indicated that compared to the neck-lower back pain group, the neck-shoulder-back pain group had a higher probability of reporting low job strain (OR=0.168, 95%CI: 0.029, 0.968) and being female (OR=4.847, 95%CI: 2.506, 9.378). In contrast, when comparing to the neck-lower back pain group, the multi-site pain group had a higher probability of reporting, low-level ergonomic workload (OR=0.079, 95%CI: 0.015, 0.412), low job strain (OR=0.019, 95%CI: 0.002, 0.145), moderate job strain (OR=0.080, 95%CI: 0.016, 0.401), high job strain (OR=0.132, 95%CI: 0.027, 0.647), less than 5 years of work experience (OR=0.173, 95%CI: 0.044, 0.683), being female (OR=2.424, 95%CI: 1.130, 5.200), and exposure to cold or drafty working environments (OR=3.277, 95%CI: 1.657, 6.481). Conclusion The positive rate WMSDs among operating room nurses in tertiary hospitals is notably high in Urumqi, with distinct co-occurrence characteristics observed within the population. To mitigate the risk of WMSDs, it is essential to implement targeted health education and prevention training programs tailored to different patterns of WMSDs. Additionally, improving working conditions, optimizing human resource allocation , and other proactive measures should be undertaken. These efforts will effectively reduce the incidence of WMSDs among operating room nurses and safeguard their occupational health.

ObjectiveThis study aims to observe the effect of sinomenine （SIN） on fatty acid binding protein 4 （FABP4） in synovial tissue of rats with osteoarthritis （OA） and investigate the therapeutic mechanism of SIN on OA， further providing new ideas for the management of osteoarthritis by traditional Chinese medicine （TCM）. MethodsAn OA rat model was constructed and randomly divided into a control group， an OA group， an OA + SIN-L group （50 mg·kg^-1）， an OA + SIN-M （100 mg·kg^-1）， an OA + SIN-H （200 mg·kg^-1）， and an OA + prednisone （PDN） group （5 mg·kg^-1）. Following surgical modeling for three weeks， an appropriate medication was administered for four weeks. During modeling and administration， a hot plate test was performed to detect the pain and swelling of the knee joints of the rats. The periarticular tissue was collected for arthropathological observation at the end of drug administration. The expression of cleaved Caspase-3， B-cell lymphoma-2 （Bcl-2）， Bcl-2 associated X protein （Bax）， and FABP4 in the synovial tissue of rats was detected by Western blot and real-time quantitative polymerase chain reaction （Real-time PCR）， and the expression and distribution of FABP4 protein in the synovial membrane were detected by immunofluorescence. ResultsCompared with those in the control group， the levels of inflammatory factors and FABP4 in the serum of rats in the OA group were significantly increased （P<0.05， P<0.01）， and joint swelling was significantly elevated （P<0.01）. The thermal pain threshold was significantly reduced （P<0.01）， and the expression of FABP4 protein and the fluorescence intensity were significantly increased （P<0.01）. The synovial tissue exhibited significantly increased inflammatory infiltration， proliferated fibroblasts， and an elevated apoptotic index （P<0.05， P<0.01）. Compared with those in the OA group， the serum lipid metabolism indexes of rats in the SIN administration group gradually returned to normal （P<0.05， P<0.01）， while the levels of inflammatory factors and FABP4 in the serum of rats in the SIN-administered group were significantly reduced （P<0.05， P<0.01）， and joint swelling was significantly decreased （P<0.05， P<0.01）. The thermal pain threshold was significantly elevated （P<0.05， P<0.01）， and the expression of FABP4 protein and fluorescence intensity in the synovial tissue were significantly decreased （P<0.05， P<0.01）. The synovial tissue displayed significantly reduced inflammatory infiltration and a decreased apoptotic index （P<0.05， P<0.01）. ConclusionThe therapeutic effect of SIN on OA may be related to the down-regulation of FABP4 expression， reduction of apoptosis， and inhibition of inflammatory factor expression.

Protein arginine methyltransferase 5 (PRMT5) acts as an oncogene in liver cancer, yet its roles and in-depth molecular mechanisms within the liver cancer immune microenvironment remain mostly undefined. Here, we demonstrated that disruption of tumor-intrinsic PRMT5 enhances CD8⁺ T-cell-mediated antitumor immunity both in vivo and in vitro. Further experiments verified that this effect is achieved through downregulation of the inhibitory immune checkpoint molecule, fibrinogen-like protein 1 (FGL1). Mechanistically, PRMT5 catalyzed symmetric dimethylation of transcription factor 12 (TCF12) at arginine 554 (R554), prompting the binding of TCF12 to FGL1 promoter region, which transcriptionally activated FGL1 in tumor cells. Methylation deficiency at TCF12-R554 residue downregulated FGL1 expression, which promoted CD8⁺ T-cell-mediated antitumor immunity. Notably, combining the PRMT5 methyltransferase inhibitor GSK591 with PD-L1 blockade efficiently inhibited liver cancer growth and improved overall survival in mice. Collectively, our findings reveal the immunosuppressive role and mechanism of PRMT5 in liver cancer and highlight that targeting PRMT5 could boost checkpoint immunotherapy efficacy.

OBJECTIVES: To explore the effects of exogenous trigger (hCG/GnRHa) versus endogenous LH surge in natural cycle IVF/ICSI (NC-IVF/ICSI) for patients with diminished ovarian reserve (DOR). METHODS: A retrospective analysis was conducted on 1,118 NC-IVF/ICSI cycles from two reproductive centers between 2013 and 2024. Propensity score matching (PSM) and multivariate logistic regression were used to adjust for confounding factors. The trigger-day hormone threshold was determined using receiver operating characteristic (ROC) curve analysis. Outcome measures included oocyte retrieval rate, 2PN fertilization rate, clinical available embryo rate, high-quality embryo rate, fresh cycle clinical pregnancy rate (CPR), and live birth rate (LBR). RESULTS: After adjusting for confounders via PSM and logistic regression, the exogenous trigger group demonstrated significantly better outcomes across all the evaluated parameters (oocyte retrieval rate, 2PN fertilization rate, transferable embryo rate, high-quality embryo rate, fresh cycle CPR, and LBR) than the endogenous LH surge group (P<0.05). Age-stratified analysis revealed that for the entire cohort, exogenous triggering significantly increased the number of transferable embryos and high-quality embryos (P<0.001). In the 35-39 years old subgroup, exogenous triggering showed significant advantages in oocyte yield, high-quality embryo rate, CPR, and LBR (P<0.05) and resulted in the most pronounced improvement in LBR (OR=6.25, 95% CI: 1.34-29.23). ROC analysis established a decision-day LH threshold of 19.055 mIU/mL (AUC=0.945, specificity=93.3%) for precise stratification of the clinical pathways. CONCLUSIONS For DOR patients undergoing NC-IVF/ICSI, exogenous triggering comprehensively improves the treatment outcomes, particularly providing significant live birth benefits for women aged 35-40 years. An individualized protocol incorporating the LH threshold (19.055 mIU/mL) effectively enhances embryonic developmental potential and live birth rates.
Humans ; Female ; Ovarian Reserve ; Pregnancy ; Propensity Score ; Retrospective Studies ; Fertilization in Vitro ; Sperm Injections, Intracytoplasmic ; Chorionic Gonadotropin ; Pregnancy Rate ; Logistic Models ; Ovulation Induction/methods* ; Gonadotropin-Releasing Hormone ; Adult ; Oocyte Retrieval

Biliary fibrosis (BF) is the result of pathological repair of bile tract injury, characterized by thickening and sclerosis of the bile duct wall and progressive stricture of the lumen, which may ultimately lead to serious adverse outcomes such as biliary obstruction, biliary cirrhosis, liver failure, and hepatobiliary malignancies. Current research describes BF as a pathological feature of certain bile tract diseases, lacking a systematic summary of its etiology, pathophysiology, molecular mechanisms, and treatment. BF is a common but easily neglected disease state in biliary system, which may promote the development and progression of hepatobiliary diseases through abnormal repair mechanism after pathological biliary tract injury. Based on the latest research progress from both domestic and international perspectives, the authors review the concept, clinical manifestation, etiology, pathogenesis, and therapeutic strategies of BF to provide a reference for clinical physicians.

  Objective  To investigate the needs of eight-year program clinical medical students for the organization and contents of clinical oncology courses.  Methods  From September to November 2020, a questionnaire survey was conducted among eight-year program clinical medicine students in Peking Union Medical College to find out their knowledge base in oncology, teaching mode preference and course contents of interest.  Results  A total of 122 students participated in the survey, in which 89.3%(109/122) of the students showed interest in basic and clinical research projects related to oncology, 84.4%(103/122) thought it was better to use Simulation-based medical education (SBME), and 91.0%(111/122) hoped to learn throughoff-line discussion. In terms of course contents, eight-year program medical students were more interested in knowledge directly related to clinical context, such as diagnosis, treatment, multidisciplinary comprehensive treatment and evidence-based medicine. In terms of sub-analysis, traditional eight-year students (86%, 92/107) showed a higher acceptance of palliative care than students in the 4+4 reform program(60%, 9/15) and were more willing to act as scriptwriters in SBME(26% vs. 7%, P=0.013). The students in clinical phase gained a better understanding of oncology knowledge through research training and were more inclined to take on the role of scriptwriters in SBME than those in basic phase (27% vs. 11%, P=0.048).  Conclusions  The eight-year program clinical medical students are interested in the clinical oncology course and prefer study in the form of Simulation-based medical education (SBME).

Objective:To analyze brain topological property data through machine learning methods and explore changes in brain network topological properties in patients with schizophrenia.Methods:From January 2022 to August 2023, functional magnetic resonance imaging data of 60 patients with schizophrenia and 56 healthy controls were collected , and the data were preprocessed to construct brain functional networks and extract global and nodal topological properties. All subjects were divided into a training group and a testing group.The data of training group were fitted based on support vector machine, and the predictive performance was evaluated through cross-validation.The model was optimized by recursive feature elimination algorithm, then the indicators that contributed the most to predictive performance were extrated.The classification performance of the testing group was calculated based on the trained model with optimal predictive performance.SPSS 20.0 software was used for data analysis, the independent t-test and χ2 test were used for comparing the differences between the two groups. Results:The support vector machine achieved an accuracy of 75.00% in predicting the test group of schizophrenia patients based on all indicators. After removing redundant features and combining with the recursive feature elimination algorithm, the accuracy of the SVM model in predicting the test group increased to 90.00%. The nodal global efficiency(Ne)of the left superior temporal gyrus, right dorsal agranular insula, bilateral dorsal granular insula, bilateral caudal cingulate gyrus, and left lateral orbitofrontal cortex in the model contributed the most to classification.Compared to the control group, patients with schizophrenia had abnormal Ne values in these brain regions.Conclusion:There are multiple brain regions with abnormal Ne values in patients with schizophrenia, indicating that the abnormalities in information integration and transmission functions may be related to the imbalance in the dynamic equilibrium of the patients' brain networks.

Objective:To construct a questionnaire on the knowledge, attitude and practice (KAP) of community general practitioners for colorectal cancer screening.Methods:From September 2023 to June 2024, an initial version of questionnaire on knowledge, attitude and practice (KAP) of community general practitioners for colorectal cancer screening was formed based on existing guidelines and related research results; then two-round Delphi experti consultation was held to finalize the initial questionnaire.Results:Twenty one experts were invited for Delphi consultation, including 14 general practitioners and 7 gastroenterologists; 7 from community health service centers and 14 from public tertiary hospitals. The enthusiasm of experts in the first round and second round consultations was 100.0% and 90.5%; the consistency of experts was 4.03-4.75 and 4.39-4.93; the coordination of experts was 0.09-0.22 and 0.03-0.12, respectively. The Kendall coordination coefficients were 0.154 and 0.390 respectively ( P<0.001), indicating that there was significant consistency in expert opinions and the results of the letter inquiry were highly reliable. The final version of the KAP questionnaire included 28 items in three dimensions: knowledge, attitude, and behavior. Among them, knowledge items K1-K9 included the determination of risk population, risk factors, screening methods, screening intervals, and other contents; attitude items A1-A12 included attitudes towards factors of patients, doctors and government that affect screening, and attitudes towards the necessity of screening; behavior items P1-P7 included active screening behaviors such as patient assessment and advices for active screening. Conclusion:This study has preliminarily constructed a questionnaire on knowledge, belief and behavior of general practitioners for colorectal cancer screening.

Objective:To analyze the immunology-related risk factors for short-term prognosis in patients with demyelinating diseases of central nervous system, and to evaluate their predictive value.Methods:From January 2012 to October 2022 in Beijing Tiantan Hospital of Capital Medical University and General Hospital of Tianjin Medical University, the clinical data of 362 patients with demyelinating diseases of central nervous system were analyzed, including neuromyelitis optic spectrum disease (NMOSD) 181 cases, multiple sclerosis (MS) 129 cases, anti-myelin oligodendrocyte glycoprotein antibody associated disease (MOGAD) 38 cases, acute disseminated encephalomyelopathy (ADEM) 14 cases. According to the expanded disability status scale (EDSS) score at discharge, the patients were divided into good prognosis group (EDSS≤3 scores, 267 cases) and poor prognosis group (EDSS>3 scores, 95 cases). The clinical data, admission severity (admission EDSS score), treatment, autoantibodies and immunoglobulin level and serum inflammatory factor level were compared between two groups. Multivariate Logistic regression was used to analyze the independent risk factors of short-term prognosis in patients with demyelinating diseases of central nervous system; and the predictive efficacy was evaluated by receiver operating characteristic (ROC) curve.Results:Compared with the good prognosis group, the admission EDSS score in the poor prognosis group was significantly higher: 2.5 (1.5) scores vs. 6.5 (3.5) scores. The positive rates of autoimmune disease-related antibody, systemic autoantibody, anti-nuclear antibody, anti-extractable nuclear antigen antibody, thyroid peroxidase antibody and thyroid globulin antibody were significantly higher: 89.5% (85/95) vs. 59.6% (159/267), 75.8% (72/95) vs. 52.1% (139/267), 65.3% (62/95) vs. 38.6% (103/267), 42.1% (40/95) vs. 23.2% (62/267), 40.0% (38/95) vs. 19.1% (51/267) and 42.1% (40/95) vs. 19.9% (53/267). The serum IgM was significantly lower: 0.84 (0.78) g/L vs. 1.00 (0.75) g/L. The serum tumor necrosis factor-α, interleukin-2 receptor and cerebrospinal fluid IgG were significantly higher: 8 055 (3 118) pg/L vs. 6 830 (3 515) pg/L, 348 (175) kU/L vs. 314 (146) kU/L and 47.50 (46.50) g/L vs. 33.00 (24.00) g/L. And there were statistical differences ( P<0.01 or <0.05). Multivariate Logistic regression analysis result showed that the admission EDSS score and anti-nuclear antibody positive were the independent risk factors of short-term prognosis in patients with demyelinating diseases of central nervous system ( OR = 5.034 and 6.942, 95% CI 3.289 to 7.705 and 2.250 to 21.422, P<0.01). ROC curve analysis result showed that the area under the curve of anti-nuclear antibody positive combined with admission EDSS score predicted the short-term prognosis in patients with demyelinating diseases of central nervous system was 0.972, with a sensitivity of 90.5%, and a specificity of 92.5%. Conclusions:The admission EDSS score and anti-nuclear antibody positive are the independent risk factors for poor prognosis in patients with demyelinating diseases of central nervous system. And the combination of two indexes can better predict the short-term prognosis.

Objective:To investigate the effect of 131I therapy on the clinical outcome of patients with differentiated thyroid cancer (DTC) who were evaluated as indeterminate response (IDR) after surgery and before 131I therapy. Methods:A total of 281 DTC patients (89 males, 192 females, age (38.4±10.2)years ) assessed as IDR before 131I therapy and after total or near-total thyroidectomy in the Department of Nuclear Medicine of Peking Union Medical College Hospital from April 2009 to March 2022 were retrospectively analyzed. Patients were divided into 131I therapy group ( 131I group) and just thyroid stimulating hormone (TSH) suppressive therapy group (TSH group) according to whether receiving 131I therapy, and the efficacies of two groups at the end of follow-up were compared. Subgroup analysis was conducted in different risk stratifications (low-risk, moderate-risk and high-risk), positive thyroglobulin antibody (TgAb) group (TgAb≥115 kU/L) and negative TgAb group (TgAb<115 kU/L). For patients with positive TgAb, the duration and rate for TgAb declining to negative level under the 2 regimens were compared. Independent-sample t test, Mann-Whitney U test, χ2 test and Fisher exact test were performed to compare the differences between groups. Results:Median follow-up time was 39(6-146) months. There was no statistical difference between patients in 131I group and TSH group in baseline characteristics, and the efficacies at the end of follow-up was similar between the 2 groups ( χ2=6.50, P=0.075). For low-, moderate- and high-risk stratification, there were also no statistical differences of response to 2 regimens ( P=0.221; χ2=4.21, P=0.223; χ2=3.01, P=0.274). Similar results were showed for patients with positive and negative TgAb ( n=50, n=231; χ2=4.02, P=0.242; χ2=3.14, P=0.341). For patients with positive TgAb, the duration and rate for TgAb declining to negative level were not statistically different either between 2 regimens (71.0%(22/31) vs 14/19, χ2=0.04, P=0.836; 7.0(5.0, 9.3) vs 7.0(5.0, 7.3) months, z=-0.89, P=0.375). Conclusion:For DTC patients assessed as IDR after surgery, 131I therapy may not provide more benefit than follow-up with TSH suppressive therapy.