Ulcerative colitis is a chronic,non-specific inflammatory disease.The persistent damage to its intestinal epithelium is key to the development of the disease.In recent years,a new form of cell death has been identified by researchers-iron death-which is thought to be an important contributor to intestinal epithelial cell death.The occurrence of iron death is often associated with abnormal intracellular iron metabolism,reduced cystine/glutamate reverse transporter activity,abnormal lipid metabolism,voltage-dependent anion channel activation and overexpression of the Nrf2 gene.Iron death can lead to smaller mitochondria,increased membrane density and reduced number of cristae,unlike conventional cell death,which does not exhibit specific phenomena.Studies have found that TCM can alleviate iron death in intestinal epithelial cells by reducing intracellular iron content,inhibiting lipid reactive oxygen species production and regulating Nrf2 gene expression,thus acting as a treatment for ulcerative colitis.Therefore,Chinese medicine may become an important tool for the treatment of ulcerative colitis.This paper reviews the relationship between cellular iron death and ulcerative colitis and the research progress of Chinese medicine in treating ulcerative colitis through the iron death pathway.

Objective To explore the value of multimodal MRI in evaluating the efficacy of retinoblastoma(RB)after selective ophthalmic artery infusion(SOAI)in children.Methods The MRI and clinical data of 80 children with intraocular RB with monocu-lar disease after chemotherapy were collected.The changes of MRI parameters in children with successful and failed eye protection before and after chemotherapy was analyzed.Results After chemotherapy,the maximum tumor diameter and △ SI were significantly reduced,the distance between tumor and optic disc and apparent diffusion coefficient(ADC)were significantly increased,the calcifi-cation/tumor ratio was increased,and the change of eyeball size was not obvious in the children with successful eye protection com-pared with before treatment.After chemotherapy,the maximum tumor diameter and the range of retinal detachment were significantly increased,and the cross-sectional area of the eyeball was significantly reduced,and △ SI,ADC and calcification/tumor ratio were not significantly changed compared with before treatment in the children with failed eye protection.Conclusion Multimodal MRI can accu-rately evaluate the effectiveness of chemotherapy in children and provide conclusive evidence for the formulation of subsequent treat-ment plans.

Objective:The purpose of this study is to test and assess the model of modeling data of TaiChi accelerator in the Raystation Treatment Planning System(RayStation system)according to the test method and item of TG119 report of American Association Physicians Medicine(AAPM).Methods:The intensity-modulated radiation therapy(IMRT)and volumetric-modulated arc therapy(VMAT)plans of the test cases of different clinical situations,which included the simulated multi target region,prostate target region,head and neck target region,easy type C-shape target region plan and difficult type C-shape target region plan,were designed according to the AAPM TG119 report in the treatment planning system.The deviations of the doses of point and area of the two kinds of plans were measured,and the measured results were compared and analyzed with the recommended standards of AAPM TG119 report.The IBA CC13 ionization chamber and the ArcCHECK matrix ionization chamber were used respectively to verify the point dose and area dose,and the assessment standard was γ passing rate under 3%3mm.The confidence interval was adopted to judge the consistency between the measured dose and the calculated dose.Results:The accuracies of plan dose target,point dose deviation and area dose distribution of tested cases could meet the requirement of the TGl19 report.The deviations of mean doses for the high-dose points of IMRT plan and VMAT plan of tested cases were respectively(0.39±1.02)%and(1.27±0.64)%,and the confidence intervals of them were respectively 2.39%and 2.52%.The average dose deviations of low doses of organ at risk(OAR)of IMRT plan and VMAT plan were respectively(0.53±1.73)%and(0.88±1.11)%,and the confidence intervals were respectively 3.92%and 3.06%.The average γ passing rate under 3%/3mm of IMRT plan and VMAT plan were respectively(99.52±0.366)%and(99.86±0.136)%,and the confidence intervals of them were respectively 1.196%and 0.406%.Conclusion:The TaiChi accelerator performance and the accuracy of Raystation system 6MV FFF model fitting can meet the standard of TG119 report,and the subsequent standards of the quality control of equipment and patients were established according to these tested results,which would provide reference for the improvement of the performance of subsequent accelerator.

Objective:To evaluate the clinical application of online adaptive radiotherapy based on iterative cone-beam computed tomography (iCBCT) for the pelvic malignancies.Methods:This was a prospective clinical trial of iCBCT guided online adaptive radiotherapy for pelvic malignancies in Department of Radiation Oncology, Peking Union Medical College Hospital. Clinical data of 13 patients with pelvic malignancies who received online adaptive radiotherapy from August to November, 2022 were preliminarily analyzed (2 cases of cervical cancer, 4 postoperative cervical cancer, 3 postoperative endometrial cancer, 3 bladder cancer and 1 prostate cancer). The feasibility of online adaptive radiotherapy, adaptive radiotherapy time, the frequency and magnitude of edits for organs at risk and target volume, target volume coverage and organs at risk doses were analyzed. Statistical analysis was performed by SPSS software. Data conforming to normal distribution were described by Mean±SD, and data with non-normal distribution were expressed by M ( Q1, Q3). Data with homogeneous variances were analyzed by t-test, and data with non-normal distribution or heterogeneous variances were analyzed by nonparametric test. Results:The average adaptive time was 15 min and 38 s (from acceptance of acquired CBCT scan to completion of the final plan selection). 85.4% (830/972 fractions) of influencer structures (system-defined organs adjacent to and with high impact on the generation of clinical target volume and planning target volume, primarily bladder, rectum and small intestine in pelvic neoplasms) automatically generated by artificial intelligence required no edits or minor editors, and 89.8% (491/547 fractions) of clinical target volume automatically generated by artificial intelligence required no edits or minor editors. The adapted plan was adopted in 98.5% (319/324 fractions) of radiotherapy fractions. Compared with the scheduled plan, the adapted plan showed better target volume coverage and reduced the dose of organs at risk.Conclusions:iCBCT guided online adaptive radiotherapy for the pelvic malignancies can be achieved within clinically acceptable timeslots. In addtion, better dose coverage of target volume shows the advantages of online adaptive radiotherapy.

In recent years, with the rapid development of Chinese domestic surgical robot technology and the expansion of the application market, the "industry-university-research-medicine" collaborative innovation transformation mode has gradually developed and formed. Medical institutions play an important role in multi-party cooperation with enterprises, universities, and research institutes, as well as in product planning, technology research and development, achievement transformation, and personnel training. On the basis of reviewing the current situation of the development of the "industry-university-research-medicine" collaborative innovation transformation mode of domestic surgical robots, this study explores the multiple roles played by medical institutions in this mode and challenges, further putting forward corresponding recommendations.
Humans ; Robotics ; Universities ; Medicine ; Industry ; Technology

Objective To study the protective effect and mechanism of Saussurea involucrata flavone capsule on the myocardial tissue of mice in simulated plateau hypoxia environment. Methods 64 Balb/c mice were randomly divided into normal control group, hypoxia model group, positive control group and Xuelian flavonoid capsule group. Myocardial tissue was observed microscopically and ultra-structurally, and the changes of hypoxia-related indexes were detected. The changes in the transcription levels of hypoxia-related genes were detected by RT-PCR, and the changes in the protein expressions of hypoxia-related genes were detected by Western blotting to study the mechanism of action of Xuelian flavone capsules. Results Saussurea involucrata flavone capsule had significantly alleviated the pathological damage to the myocardium of mice caused by simulated altitude hypoxia, increased the activity of T-AOC in myocardial tissue, reduced the accumulation of LD, and also reduced the expression levels of HIF-1α and VEGF mRNA in myocardial tissue, increased the SOD, CAT mRNA and protein expression levels. Conclusion Saussurea involucrata flavone capsule have good anti-altitude hypoxia effect, which could protect myocardial tissue structure and function, regulate energy metabolism, and improve antioxidant capacity. The mechanism might be related to improving the antioxidant capacity, regulating energy metabolism, and affecting the protein expression of HIF-1α, VEGF, SOD and CAT mRNA in high altitude hypoxic mice.

ObjectiveTo investigate a cluster epidemic of coronavirus disease 2019 （COVID-19） infections in a school in Longchuan County， Yunnan Province， and further guide the prevention and control of COVID-19 in the border area. MethodsAccording to the Protocol on Prevention and Control of Novel Coronavirus Pneumonia （8th Edition）， an epidemiological investigation was performed on all COVID-19 cases to collect the information on demographics， onset， diagnosis and treatment， prognosis， and epidemiological history. Close contacts were also tracked to determine the transmission chains. ResultsIn this cluster epidemic， a total of 37 COVID-19 cases were identified， including 32 females and 5 males aged from 13 to 25 years， who were 35 students and 2 teachers. The student cases were found in four classes of two grades. Furthermore， gene sequencing showed that all cases had been infected with delta variants， belonging to the same transmission chain that was not related to the previous epidemics in Dehong Prefecture. In additionally， a total of 2 127 close contacts were found. After 21 days of centralized quarantine for medical observation， all close contacts tested negative for SARS-CoV-2. In the COVID-19 cases， only one case remained positive for SARS-CoV-2， while the other 36 cases were successfully treated and became negative. ConclusionThis school cluster is caused by the border villagers who contacted the water polluted with SARS-CoV-2. It warrants more strict management of students from border villages and their belongings to prevent similar epidemics in school settings.

Objective:To investigate the knowledge level of hospice care and the related influencing factors among health providers in Shanghai.Methods:From November to December 2019,a questionnaire survey on the hospice care knowledge was conducted among 7 074 health providers from 223 registered hospice care clinics or institutions in 16 districts of Shanghai.Results:A total of 7 027 valid questionnaires were recovered, with an effective recovery rate of 99.3%. Among the 7 027 responders, there were 1 460 males (20.8%) and 5 567 females (79.2%) with an mean age of (36.9±9.3) years; 2 682 nurses (38.2%) and 2 442 doctors (34.8%); 5 065 (72.1%) from community health service centers; 2 982 (42.4%) involving in hospice care services and 4 039 (57.5%) willing to work in hospice care. The average score of hospice care knowledge was (8.9±2.6), and the average accuracy for questions was 59.0%. Health providers had the highest awareness rate for the composition of hospice care professional team (93.9%, 6 597/7 027) and the lowest awareness rate for the emotional commitment in hospice care service (16.6%, 1 165/7 027). Health providers with junior colleges degree ( B=-0.429), vocational college degree and below ( B=-0.544), nurses ( B=-0.652), working in suburban areas ( B=-0.278), social office ( B=-0.891), without witness of dying process of end-of-life patients ( B=-0.329), not involving in hospice care services ( B=-0.283), and not willing to participating in hospice care ( B=-0.820) had low knowledge scores ( P<0.05). Conclusions:The overall level of hospice care knowledge of health providers in Shanghai is generally at a medium level, and the training of hospice care knowledge should be strengthened for the better development of hospice care.

Objective:To investigate the current training needs of hospice care among health providers in Shanghai.Methods:Based on the B.S. Bloom classification of educational objectives,a questionnaire on the training needs of hospice care for health providers in Shanghai was developed. From November to December 2019,a questionnaire survey on the training needs of hospice care was conducted among 7 074 health providers in 223 medical institutions in Shanghai.Results:A total of 7 027 valid questionnaires were recovered, with an effective recovery rate of 99.3%. The training needs of health providers in Shanghai exceeded 71.0% for all items,with the average score of (2.58±0.63). The degree of training needs in each dimension ranges from high to low were knowledge(2.59±0.64), action(2.57±0.68) and motion(2.56±0.70). The top three training needs were“living will and law”(80.5%,5 660/7 027),“social work methods for hospice care”(75.3%, 5 290/7 027)and“stress and adaption in hospice care services”(75.1%,5 279/7 027). Female health providers(2.61±0.62), administrators, medical personnel and other post workers(2.68±0.56),those with junior professional title(2.61±0.62), with no witness of dying process(2.65±0.58),and those without participating in hospice care service(2.68±0.55)had higher training needs( P<0.05). Conclusion:The training needs of hospice care for health providers are very high in all hospitals. It is suggested to conduct stratified and targeted training for health providers in different positions and institutions according to the different training needs of hospice care.

The provision of hospice care can improve the quality of life for terminal patients. Currently the measurement tools for knowledge, attitudes and practices(KAP)of hospice care providers have been developed and widely used internationally. This article reviews the measurement scales and relevant factors for KAP of hospice care to provide reference for further studies. The databases of CNKI, Wanfang data, PubMed, Web of Science databases, Google and Baidu search engines were systematically searched. According to the retrieval strategy, 42 literatures were finally included for analysis. The development of measurement scales and influencing factors about KAP of medical staff were reviewed from the included studies. It appeared some mature scales have been applied in different extent, or available for interpretation into different language versions. Most of researches adopted quantitative tools to measure medical staff's KAP on hospice care. The current researches conducted in China mainland showed a change on target population from nurses to specialized doctors and from a single group to multidisciplinary medical team. In the future, it would be more focusing on multidisciplinary team mainly comprised of general practitioners, nurses and social workers. Till recently, there is little literature evidence for study of the characteristics of localization.