Ursodeoxycholic acid (UDCA) is a naturally occurring, low-toxicity, and hydrophilic bile acid (BA) in the human body that is converted by intestinal flora using primary BA. Solute carrier family 7 member 11 (SLC7A11) functions to uptake extracellular cystine in exchange for glutamate, and is highly expressed in a variety of human cancers. Retroperitoneal liposarcoma (RLPS) refers to liposarcoma originating from the retroperitoneal area. Lipidomics analysis revealed that UDCA was one of the most significantly downregulated metabolites in sera of RLPS patients compared with healthy subjects. The augmentation of UDCA concentration (≥25 μg/mL) demonstrated a suppressive effect on the proliferation of liposarcoma cells. [¹⁵N₂]-cystine and [¹³C₅]-glutamine isotope tracing revealed that UDCA impairs cystine uptake and glutathione (GSH) synthesis. Mechanistically, UDCA binds to the cystine transporter SLC7A11 to inhibit cystine uptake and impair GSH de novo synthesis, leading to reactive oxygen species (ROS) accumulation and mitochondrial oxidative damage. Furthermore, UDCA can promote the anti-cancer effects of ferroptosis inducers (Erastin, RSL3), the murine double minute 2 (MDM2) inhibitors (Nutlin 3a, RG7112), cyclin dependent kinase 4 (CDK4) inhibitor (Abemaciclib), and glutaminase inhibitor (CB839). Together, UDCA functions as a cystine exchange factor that binds to SLC7A11 for antitumor activity, and SLC7A11 is not only a new transporter for BA but also a clinically applicable target for UDCA. More importantly, in combination with other antitumor chemotherapy or physiotherapy treatments, UDCA may provide effective and promising treatment strategies for RLPS or other types of tumors in a ROS-dependent manner.

Objective To investigate the implementation of surveillance,prevention and control measures for healthcare-associated infection(HAI)in maternal and child healthcare(MCH)institutions,and provide policy evi-dence for optimizing HAI prevention and control in MCH institutions.Methods Stratified sampling was conducted among the MCH institutions at provincial,municipal and county levels in 8 provinces/autonomous regions.A uni-fied questionnaire was designed and the online survey was conducted through"Questionnaire Star".Results The data from 123 MCH institutions were included in the analysis.90.24％of the MCH institutions carried out compre-hensive surveillance on HAI.The ratios of MCH institutions which implemented targeted surveillance on HAI in neonatal intensive care unit(NICU),surgical site infection,multidrug-resistant organisms(MDROs)and HAI in intensive care units(non-NICU excluded)were 89.66％,85.96％,80.77％,and 74.19％,respectively.51.22％MCH institutions adopted information surveillance system on HAI cases.94.31％MCH institutions carried out surveillance on hand hygiene compliance.Over 90％MCH institutions carried out surveillance on environment hy-giene in high-risk departments.71.54％MCH institutions conducted centralized cleaning,disinfection,sterilization and supply for reusable medical instruments in the central sterile supply department(CSSD).Over 90％MCH insti-tutions established three-level pre-examination triage systems.86.18％set up transitional wards.MCH institutions generally adopted a management model with established effective communication,full appointment visits,and sepa-rate visits for special medical groups,such as registered pregnant women,high-risk newborns,healthcare groups,and long-term rehabilitation patients.However,the ratio of institutions conducting on-line follow-up visits was less than 50％.Conclusion MCH institutions have generally carried out comprehensive and targeted surveillance on HAI.Information surveillance need to be facilitated.Hand hygiene and environmental hygiene surveillance has been popularized to a certain extent at all levels of MCH institutions.The cleaning,disinfection,sterilization,and supply processes of reusable medical devices in a few MCH institutions are not standardized.Special medical populations get effective management.On-line healthcare is to be further promoted.

ObjectiveCellular temperature imaging can assist scientists in studying and comprehending the temperature distribution within cells, revealing critical information about cellular metabolism and biochemical processes. Currently, cell temperature imaging techniques based on fluorescent temperature probes suffer from limitations such as low temperature resolution and a limited measurement range. This paper aims to develop a single-cell temperature imaging and real-time monitoring technique by leveraging the temperature-dependent properties of single-molecule quantum coherence processes. MethodsUsing femtosecond pulse lasers, we prepare delayed and phase-adjustable pairs of femtosecond pulses. These modulated pulse pairs excite fluorescent single molecules labeled within cells through a microscopic system, followed by the collection and recording of the arrival time of each fluorescent photon. By defining the quantum coherence visibility (V) of single molecules in relation to the surrounding environmental temperature, a correspondence between V and environmental temperature is established. By modulating and demodulating the arrival times of fluorescent photons, we obtain the local temperature of single molecules. Combined with scanning imaging, we finally achieve temperature imaging and real-time detection of cells. ResultsThis method achieves high precision (temperature resolution<0.1°C) and a wide temperature range (10-50°C) for temperature imaging and measurement, and it enables the observation of temperature changes related to individual cell metabolism. ConclusionThis research contributes to a deeper understanding of cellular metabolism, protein function, and disease mechanisms, providing a valuable tool for biomedical research.

ObjectiveTemporal heterogeneity in lung cancer presents as fluctuations in the biological characteristics, genomic mutations, proliferation rates, and chemotherapeutic responses of tumor cells over time, posing a significant barrier to effective treatment. The complexity of this temporal variance, coupled with the spatial diversity of lung cancer, presents formidable challenges for research. This article will pave the way for new avenues in lung cancer research, aiding in a deeper understanding of the temporal heterogeneity of lung cancer, thereby enhancing the cure rate for lung cancer. MethodsRaman spectroscopy emerges as a powerful tool for real-time surveillance of biomolecular composition changes in lung cancer at the cellular scale, thus shedding light on the disease’s temporal heterogeneity. In our investigation, we harnessed Raman spectroscopic microscopy alongside multivariate statistical analysis to scrutinize the biomolecular alterations in human lung epithelial cells across various timeframes after benzo(a)pyrene exposure. ResultsOur findings indicated a temporal reduction in nucleic acids, lipids, proteins, and carotenoids, coinciding with a rise in glucose concentration. These patterns suggest that benzo(a)pyrene induces structural damage to the genetic material, accelerates lipid peroxidation, disrupts protein metabolism, curtails carotenoid production, and alters glucose metabolic pathways. Employing Raman spectroscopy enabled us to monitor the biomolecular dynamics within lung cancer cells in a real-time, non-invasive, and non-destructive manner, facilitating the elucidation of pivotal molecular features. ConclusionThis research enhances the comprehension of lung cancer progression and supports the development of personalized therapeutic approaches, which may improve the clinical outcomes for patients.

Objective To investigate the risk factors for pulmonary infection in patients with acute-on-chronic liver failure(ACLF),and to establish a predictive model.Methods A retrospective analysis was performed for 585 ACLF patients who were admitted to Department of Infectious Diseases,The Second Affiliated Hospital of Air Force Medical University,from January 2009 to September 2022,and according to the condition of pulmonary infection after admission,they were divided into infection group with 213 patients and non-infection group with 372 patients.The independent-samples t test or the Mann-Whitney U test was used for comparison of continuous data between two groups,and the chi-square test was used for comparison of categorical data between groups.The clinical data of these patients were collected.Univariate and multivariate Logistic regression analyses were used to investigate the risk factors for pulmonary infection in ACLF patients and establish a predictive model,and the receiver operating characteristic(ROC)curve was plotted to assess the predictive value of the model.The Hosmer-Lemeshow test was used to evaluate the degree of fitting of the model,and the ROC curve and the area under the ROC curve(AUC)were used to assess the predictive performance of the model.Results Among the 585 patients with ACLF,213 experienced pulmonary infection,with an infection rate of 36.41%.The multivariate logistic analysis showed that upper gastrointestinal bleeding(odds ratio[OR]=2.463,P=0.047),infection at other sites(OR=2.218,P=0.004),femoral vein catheterization(OR=2.520,P＜0.001),and combined use of two or more antibiotics(OR=2.969,P＜0.001)were risk factors for pulmonary infection in ACLF patients.These factors were included in the risk factor predictive model of Logit(P)=-1.869+0.901×upper gastrointestinal bleeding+0.755×infection at other sites+0.924×femoral vein catheterization+1.088×combined use of two or more antibiotics.The ROC curve analysis showed that the model had a good predictive value(Hosmer-Lemeshow χ2=3.839,P=0.698),with an AUC of 0.753(95%confidence interval:0.700-0.772).Conclusion There is a relatively high incidence rate of pulmonary infection in patients with ACLF,and upper gastrointestinal bleeding,spontaneous peritonitis,femoral vein catheterization,and combined use of two or more antibiotics are related risk factors.The model established based on these factors can effectively predict the onset of pulmonary infection in ACLF patients.

Objective To observe whether SaCoVLM laryngeal mask can cause gastroesophageal reflux when the body position changes(lithotomy position and supine position).Methods A total of 70 patients were selected for elective surgery in Shanghai General Hospital from Dec 1st,2021 to Sep 30th,2022.There were 35 patients with ureteroscopy in urology and 35 patients with ankle surgery in trauma orthopedics selected as lithotomy position group and supine position group,respectively.Under SaCoVLM laryngeal mask anesthesia,a dual probe pH electrode was placed in the esophagus to continuously monitor the pH value in the esophagus.The pH values and their changing trends in the lithotomy position and supine position of the esophagus were compared under general anesthesia with SaCoVLM laryngeal mask ventilation,and the possibility of gastroesophageal reflux occurring in both positions was explored.Results The peak airway pressure at each time point(5 min,10 min,15 min,20 min and 30 min)after body position was determined in the two groups,and it in lithotomy position group was significantly higher than that in supine position group,and the difference was statistically significant(P＜0.05).The middle and upper esophageal pH values of the two groups were compared 10 min after laryngeal mask insertion,and it in lithotomy position group(6.045±0.490)was significantly lower than the supine group(6.532±0.366),and the difference was statistically significant(P＜0.05).The middle and upper esophageal pH values of the two groups were compared 10 min and 15 min after laryngeal mask insertion.They in lithotomy position group were significantly lower than those in supine position group,and the differences were statistically significant(10 min:6.045±0.490 vs.6.532±0.366,P=0.031;15 min:5.828±0.487 vs.6.474±0.411,P=0.048).There was no significant difference in the pH of the middle and upper esophagus between the two groups at 1,5,20 and 30 minutes of laryngeal mask insertion.There was no significant difference in the pH value of the esophageal opening between the two groups at each time point after laryngeal mask insertion.Conclusion Under SaCoVLM laryngeal mask ventilation,the risk of gastroesophageal reflux during lithotomy surgery may be higher than during supine surgery.

BackgroundThe existing tools in China for assessing psychiatric nurses' knowledge， attitude and practice towards the use of protective restraint do not sufficiently consider the specialty in psychiatric practice， and the scale items are somewhat cumbersome to use， which together restrict their further promotion and application. Accordingly， there is an urgent need for developing a more scientific assessment tool. ObjectiveTo construct a scale for assessing psychiatric nurses' knowledge， attitude and practice towards the use of protective restraint and to verify its reliability and validity， so as to provide a generic tool for the assessment. MethodsBased on the theoretical framework of the knowledge-attitude-practice model， the preliminary scale was formed through systematic literature review， qualitative interview and Delphi method. From July to December 2021， a stratified sampling was utilized to select 729 psychiatric nurses from tertiary， secondary and primary （including unclassified medical institutions and grassroots hospitals） psychiatric hospitals in Guangdong Province. The formal scale was developed through item analysis， exploratory factor analysis and confirmatory factor analysis. The validity of the scale was evaluated by content validity and structure validity， and the reliability was verified by procedures including Cronbach's α coefficient， test-retest reliability， and split-half reliability. ResultsA total of 12 items of three dimensions （knowledge， attitude， practice） were included in the scale for assessing psychiatric nurses' knowledge， attitude and practice towards the use of protective restraint. The scale-level content validity index （S-CVI） was 0.941， and the item-level content validity index （I-CVI） ranged from 0.812 to 1.000. Exploratory factor analysis extracted three common factors， and the cumulative variance contribution rate was 62.948%. The confirmatory factor yielded adequate fit. Cronbach's α coefficient was found to be 0.887 for the scale， 0.819 for knowledge dimension， 0.842 for attitude dimension， and 0.831 for practice dimension. The split-half reliability and test-retest reliability for the scale were 0.712 and 0.922， respectively. ConclusionThe scale shows satisfactory reliability and validity， which can be used to assess psychiatric nurses' knowledge， attitude and practice towards the use of protective restraint. ［Funded by Guangdong Clinical Teaching Base Teaching Reform Research Project （number， 2021JD119）］

AIM:To investigate the mechanism by which wogonin(WOG)induces ferroptosis in collagen-in-duced arthritis rat fibroblast-like synoviocytes(rat CIA-FLS cells)through the nuclear factor E2-related factor 2(NRF2)/heme oxygenase-1(HO-1)signaling pathway.METHODS:Rat CIA-FLS cells were divided into:control group,low,medium,and high dose of(25,50 and 100 μmol/L)WOG group,ferroptosis inhibitor(LIP-1)group,LIP-1+high dose WOG group,HO-1 agonist cobalt protoporphyrin(COPP)group,and COPP+high dose WOG group.CCK-8 assay was used for cell viability.Crystal violet staining was used for for cell morphology.The levels of oxidative stress markers gluta-thione(GSH),malondialdehyde(MDA),and superoxide dismutase(SOD)were measured.DCFH-DA fluorescent probe was used to detect the intracellular reactive oxygen species(ROS)content as well as Western blot to detect the protein ex-pression levels of Kelch-like ECH-associated protein 1(KEAP-1),NRF2 and HO-1.RESULTS:Compared with the nor-mal control group,administration of WOG treatment resulted in a significant decrease in CIA-FLS cell viability(P<0.01),a significant increase in the level of oxidative stress(P<0.01),a significant increase in the content of ROS(P<0.01),a significant decrease in the level of expression of NRF2 and HO-1 proteins(P<0.01),and a significant increase in the level of KEAP-1(P<0.01)in the rat.Compared with the WOG group,the LIP-1-treated group showed a significant increase in cell viability(P<0.01),a significant decrease in the level of oxidative stress(P<0.01),and a significant de-crease in the content of ROS(P<0.01).Compared with the WOG group,the addition of COPP resulted in a significant in-crease in the protein expression levels of NRF2 and HO-1(P<0.01)and a significant decrease in KEAP-1 levels(P<0.01).CONCLUSION:WOG can induce ferroptosis in rat CIA-FLS cells by promoting oxidative stress through the NRF2/HO-1 signaling pathway.

Objective:We aimed to develop a novel visualized model based on nomogram to predict postoperative overall survival.Methods:This was a multicenter, retrospective, observational cohort study, including participants with histologically confirmed gastric and colorectal cancer who underwent radical surgery from 11 medical centers in China from August 1, 2015 to June 30, 2018. Baseline characteristics, histopathological data and nutritional status, as assessed using Nutrition Risk Screening 2002 (NRS 2002) score and the scored Patient-Generated Subjective Global Assessment, were collected. The least absolute shrinkage and selection operator regression and Cox regression were used to identify variables to be included in the predictive model. Internal and external validations were performed.Results:There were 681 and 127 patients in the training and validation cohorts, respectively. A total of 188 deaths were observed over a median follow-up period of 59 (range: 58 to 60) months. Two independent predictors of NRS 2002 and Tumor-Node-Metastasis (TNM) stage were identified and incorporated into the prediction nomogram model together with the factor of age. The model's concordance index for 1-, 3- and 5-year overall survival was 0.696, 0.724, and 0.738 in the training cohort and 0.801, 0.812, and 0.793 in the validation cohort, respectively.Conclusions:In this study, a new nomogram prediction model based on NRS 2002 score was developed and validated for predicting the overall postoperative survival of patients with gastric colorectal cancer. This model has good differentiation, calibration and clinical practicability in predicting the long-term survival rate of patients with gastrointestinal cancer after radical surgery.

Aim To investigate the enhanced efficacy and reduced toxicity of GanoExtra in combination with cyclophosphamide(CTX)on inhibiting lung metastasis and immune function in mice.Methods The CCK-8 method was used to verify the cytotoxic effects of Gano-Extra on MCF-7 and 4T1 tumor cells.In vivo experi-ment,a mouse model of lung metastasis of breast canc-er was established by injecting 4T1 tumor cells into the tail vein,which was divided into four groups including 4T1 model group,CTX group,GanoExtra group and GanoExtra+CTX group.The control group was set.After 21 days,the mice were euthanized under anes-thesia,and the body weight of the mice was recorded.Average lung index and spleen index were calculated.The mouse spleen lymphocyte transformation experi-ment was used to determine the activity of spleen cells.The NK cell activity assay was used to determine the activity of NK cells.Blood cells were determined in mouse blood samples.Flow cytometry was used to de-termine the levels of CD4+and CD8+T cells in blood samples.ELISA was used to measure the levels of TNF-α and IL-6 in serum.HE staining was used to ob-serve the pathological morphological changes in tumors and various tissues;and CFSE staining was used to de-termine the proliferative effect of GanoExtra on CD8+cells.Results In vitro GanoExtra at 50 mg·L-1 sig-nificantly inhibited the activity of MCF-7 and 4T1 tumor cells.In the breast cancer pulmonary metastasis model,compared with the model group,the spleen in-dex and blood WBCs content were significantly re-duced,while the activity of NK cells,spleen cells,and the proportion of RBCs,CD 3+and CD 8+T cells in the blood were significantly increased.At the end of the treatment,compared with the CTX group,the number of lung metastases and lung index of the Gano-Extra+CTX group were significantly reduced,and the levels of HGB,CD8+cells,IL-6,and TNF-α in the blood of mice were significantly increased.GanoExtra at 10 mg·L-1 significantly promoted the proliferation of CD8+T cells in vitro.Conclusions GanoExtra can enhance the inhibitory effect of CTX on tumor metasta-sis,alleviate adverse reactions such as splenomegaly and pulmonary enlargement caused by CTX,and have a health-promoting function of promoting the prolifera-tion of CD8+T cells to enhance the immune efficacy of the body.