Objective To explore the value of artificial intelligence federated learning system based on chest X-ray films for pathogen diagnosis of community-acquired pneumonia(CAP)in children.Methods Totally 900 cases of CAP children from 2 hospitals were retrospectively enrolled,including bacterial,viral and mycoplasma CAP(each n=300),and chest posteroanterior X-ray films were collected.Meanwhile,chest posteroanterior X-ray films of 5856 children from the publicly available dataset GWCMCx were collected,including 4273 CAP images and 1583 healthy chest images.All above 6756 images were divided into training set(n=5359)and validation set(n=1397)at the ratio of 8∶2.Then a pathogen diagnosis model of children CAP was established based on attention mechanism.Binary and ternary diagnostic algorithms were designed,and federated deployment training was performed.The efficacy of this system for pathogen diagnosis of children CAP was analyzed and compared with DenseNet model.Results Based on all data,the accuracy of the obtained artificial intelligence federated learning system model for diagnosing children CAP was 97.00%,with the area under the curve(AUC)of 0.990.Based on hospital data,the AUC of this system using single imaging data and clinical-imaging data for pathogen diagnosis of children CAP was 0.858 and 0.836,respectively,both better than that of DenseNet model(0.740,both P＜0.05).Conclusion The artificial intelligence federated learning system based on chest X-ray films could be used for pathogen diagnosis of children CAP.

Autism spectrum disorder (ASD) is one of the common neurodevelopmental disorders in children. Its etiology and pathogenesis are poorly understood. Previous studies have suggested potential changes in the complement and coagulation pathways in individuals with ASD. In this study, using multiple reactions monitoring proteomic technology, 16 of the 33 proteins involved in this pathway were identified as differentially-expressed proteins in plasma between children with ASD and controls. Among them, CFHR3, C4BPB, C4BPA, CFH, C9, SERPIND1, C8A, F9, and F11 were found to be altered in the plasma of children with ASD for the first time. SERPIND1 expression was positively correlated with the CARS score. Using the machine learning method, we obtained a panel composed of 12 differentially-expressed proteins with diagnostic potential for ASD. We also reviewed the proteins changed in this pathway in the brain and blood of patients with ASD. The complement and coagulation pathways may be activated in the peripheral blood of children with ASD and play a key role in the pathogenesis of ASD.
Child ; Humans ; Autism Spectrum Disorder/metabolism* ; Proteomics ; Brain/metabolism*

Objective:To investigate the genetic risk factors and prognosis of 190 patients with myelodysplastic syndrome(MDS). Methods:The clinical data of 190 patients with MDS admitted to the Department of Hematology,The First Affiliated Hospital of Chongqing Medical University from January 2015 to October 2020 were analyzed retrospectively,and the genetic background and survival curve of the patients were also analyzed. Results:MDS patients with higher risk according to International Prognostic Score System(IPSS)stratification at the time of initial diagnosis had more frequent and complex types of gene mutation and chromosomal abnormalities,indicating poor prognosis.The choice of treatment is associated with the prognosis of MDS patients with intermediate risk(IPSS stratification),and the relative risk of the overall survival rate of patients treated with hypomethylating agents is higher than that of patients on concomitant medication. Conclusion:MDS patients with higher-risk(IPSS stratification)have more complex genetic risk factors and lower survival rate than those with lower-risk(IPSS stratification).MDS patients with multiple genetic risk factors have a poor prognosis,and the type of gene mutation is a predictor of prognosis.

Objective:To analyze the relationship between arch index and foot kinematic parameters and their characteristics in stress fracture of lower extremity.Methods:A case-control study was performed for 108 recruits selected from a certain army unit in 2019. Before training, the recruits′ foot print images were collected by the capacitive plantar pressure measurement system to calculate their arch indices. The kinematic characteristics of the foot were analyzed by the dynamic gait posture analysis system. Spearman rank correlation analysis between arch index and foot kinematic parameters including landing elevation angle, toe-off angle, landing speed, landing varus angle, valgus amplitude and landing valgus speed were performed. Throughout the training, orthopedic physicians followed up the recruits, among whom 10 were excluded due to other types of lower extremity injuries. The arch index and foot kinematic characteristics were analyzed and compared between the remained recruits with stress fracture of lower extremity (fracture group, n=10) and those without lower extremity injury (control group, n=79). Results:(1) For the recruits, the arch index was 0.21(0.12,0.25), with landing elevation angle for (17.31±4.02)°, toe-off angle for (63.90±5.63)°, landing speed for (176.85±24.39)°/s, landing varus angle for (13.64±4.44)°, valgus amplitude for (12.16±3.42)°, and landing valgus speed for 382.50(311.05,474.80)°/s. (2) The landing varus angle ( r=0.25, P<0.01) and valgus amplitude ( r=0.14, P<0.05) were positively related to the arch index. (3) The arch index, toe-off angle and landing valgus speed were 0.20(0.07,0.24), (61.59±5.51)° and 336.00(251.02,428.67)°/s in fracture group, significantly lower than 0.23(0.17,0.26), (64.79±4.79)° and 381.20(313.63,470.92)°/s in control group ( P<0.05 or 0.01). There were no significant differences in the landing elevation angle, landing speed, landing varus angle and valgus amplitude between the two groups (all P>0.05). Conclusions:The change of the arch index can affect the landing varus angle and valgus amplitude of the foot. Recruits who suffer from stress fracture of lower extremity have the characteristics of higher arch, lower toe-off angle and lower landing valgus speed.

Objective: To propose the concept of a novel regional control and prevention (RCP) system for the outbreak of COVID-19 infectious disease, design an emergency epidemic prevention information system based on the existing network architecture and information system in the region, and a remote intelligent medical consultation and remote office platform, research and develop the technology of risk assessment and early warning for people in the region, and improve the regions’prevention and control ability facing emergency of major infectious diseases. Methods: Taking colleges, affiliated (teaching) hospitals, and cloud applications as typical RCP regional units, the existing local area network interaction methods between the cloud and universities and affiliated (teaching) hospitals are established to realize remote work in the network environment, remote medical imaging, psychological and ethical consultation and interaction; applying multi-agent propagation model based on complex network, combining Global Positioning System (GPS), Radio Frequency Identification (RFID), and electronic fence technology, to realize the risk classification and early warning of units and personnel in the area. Results: In the RCP, a system architecture combining campus network, affiliated (teaching) hospital intranet, and the Internet is used. Dynamic connection is made using distributed technology and cloud storage. The data buffer mechanism of the intermediary database in the network realized telemedicine consultation and telecommuting. Relying on the platform, multi-agent propagation model based on complex network and cellular automaton model are used to realize the score and early warning of population exposure risk in the region by using GPS, RFID and electronic fence technology. Conclusions In the epidemic phase of major infectious diseases, the construction of RCP can improve the response speed of wartime epidemic prevention, provide reasonable data-based warnings and risk ratings, and reduce the exposure risk of susceptible people. The design and development of RCP is a systematic project that needs to combine regional structural and functional characteristics, and the foundation of the early informatization work in the region and the level of the emergency development team determine the development progress, maintenance, and actual application effects. It is recommended to establish a peacetime and wartime combined RCP mode and incorporate it into the government's disease control system to improve the national and regional level of prevention and control of major infectious diseases.

Antineoplastic Combined Chemotherapy Protocols/therapeutic use* ; Disease-Free Survival ; Etoposide ; Hematopoietic Stem Cell Transplantation ; Humans ; Lymphoma/therapy* ; Neoplasm Recurrence, Local ; Retrospective Studies ; Transplantation, Autologous

Objective:To analyze the disadvantages of " paper-centric" in science and technology evaluation, explore how to establish a new evaluation model of scientific and technological innovation in academic universities in China on the premise of breaking the " paper-centric" orientation.Methods:Analyze problems and disadvantages of the " paper-centric" orientation in the evaluation of science and technology at academic universities in China, take account into the in-depth interpretation of key policies of breaking away from " paper-centric" in recent years, and finally make proposal for the establishment of evaluation system and mode of scientific and technological innovation in the future.Results:There are many pitfalls in the " paper-centric" orientation in the evaluation of science and technology in academic universities in China, thus, it is urgent to establish a new evaluation mode of scientific and technological innovation.Conclusions:Based on the current domestic and international context, academic universities in China should deploy the strategy of scientific and technological innovation in advance, break the " paper-centric" orientation, and establish a new evaluation system and mode of science and technology that proactively match the national strategy and the development requirement.

Twenty-six novel tricyclic sophoridinic and matrinic derivatives containing a common chlorinated benzene fragment were designed, synthesized and evaluated for their anti-ebolavirus (EBOV) activities. Structure-activity relationship analysis indicated: (i) 12-dichlorobenzyl motif was beneficial for the activity; (ii) the chiral configuration at C5 atom might not affect the activity much. Among the target compounds, compound exhibited the most potent potency against EBOV with an IC value of 5.29 μmol/L and an SI value of over 37.8. Further anti-EBOV assay of identified its high effectiveness, and anti-MARV assay of suggested its inspiring broad-spectrum anti-filovirus activity. The results provided powerful information on further strategic optimization and development of this kind of compounds against filoviruses.

Objective To evaluate the short-term and long-term outcomes of laparoscopic splenectomy combined with eradication of Helicobacter pylori (HP) in patients with idiopathic thrombocytopenic purpura (ITP).Methods 72 patients with ITP were divided into three groups:the eradication of Hp group (group A),the untreated or failure group (group B),and the Hp-negative group (group C).Results Hppositive Patients (group A and group B) were significantly shorter in the course of disease before splenectomy (26.7± 13.8 months vs.45.2±22.1 months,P＜0.05),and lower in platelet counts peak within 7 days after splenectomy (134.9±53.9) × 109/L vs.(250.9± 160.5) × 109/L,P＜0.05) than Hp-negative patients.After discharge from hospital,in 28 patients who received infection therapy against Hp by taking amoxicillin,CLA,omeprazole for one month,21 (75.0％) patients had the Hp eradicated,but in 7 patients the eradication failed.The PLT between these 2 groups of patients were (189.6± 114.8)× 109/L vs.(124.0±45.7) × 109/L,(P＜0.05).The long-term outcomes in platelet counts and remission rates after spleuectomy of the three groups of patients were (149.7±90.6) × 109/L,76.1％ (group A);(98.5±64.1) × 109/L,66.6％(group B);(172.4± 102.0)× 109/L,80.0％ (group C).The platelet count in group B was significantly lower than group C (P＜0.05).There was no statistical significance between group A and group C (P＞0.05).There was no significant difference in the remission rates in the three groups.Conclusions Eradication of Hp improved the short-term and long-term outcomes of Hp-positive ITP patients after splenectomy.

Objective To retrospectively analyze the influence factors during autologous peripheral blood stem cell (PBSC) mobilization and collection process in the patients with non-Hodgkin′s lymphoma (NHL).Methods Forty-eight patients with NHL in our hospital from January 2014 to August 2016 underwent PBPC mobilization and collection.The factors of age,sex,disease stage,bone marrow involvement at diagnosis,chemotherapy frequency,relapse and so on were analyzed retrospectively.Results PBSC mobilization and collection was successful in 37 cases (77.10%).The success rate was affected by the time from diagnosis to mobilization (P=0.038),chemotherapy courses (P=0.016),prior chemotherapy including fludarabine (P=0.049),relapse(P=0.033),and the levels of white blood cell (P=0.014) and platelet (P<0.01) before stem cells collection.Conclusion For the patients planning to receive autologous peripheral blood stem cell transplantation,many times of prior chemotherapy are unfavorable,mobilization and collection should be taken as early as possible,chemotherapeutic agents which possibly injure stem cells should be avoided,it is needed to simultaneously pay attention to peripheral blood WBC and platelet level for determining the collection timing.