The organization of the brain follows a topological hierarchy that changes dynamically during development. However, it remains unknown whether and how cognitive training administered over multiple years during development can modify this hierarchical topology. By measuring the brain and behavior of school children who had carried out abacus-based mental calculation (AMC) training for five years (starting from 7 years to 12 years old) in pre-training and post-training, we revealed the reshaping effect of long-term AMC intervention during development on the brain hierarchical topology. We observed the development-induced emergence of the default network, AMC training-promoted shifting, and regional changes in cortical gradients. Moreover, the training-induced gradient changes were located in visual and somatomotor areas in association with the visuospatial/motor-imagery strategy. We found that gradient-based features can predict the math ability within groups. Our findings provide novel insights into the dynamic nature of network recruitment impacted by long-term cognitive training during development.
Child ; Humans ; Cognitive Training ; Magnetic Resonance Imaging ; Brain ; Brain Mapping ; Motor Cortex

Autologous ozonized blood transfusion(AOBT) is a therapy of re-transfusion of 100-200 mL of autologous blood after shaking and agitation with appropriate amount of oxygen-ozone in vitro. The oxidation of blood through the strong oxidation of ozone can enhance the non-specific immune response of the body, regulate the internal environment and promote health. This therapy has been increasingly applied in clinical practice, while no unified standard for the operation process in terms of ozone concentration, treatment frequency and treatment course had been established. This operation process of AOBT is primarily explored in order to standardize the operation process and ensure its safety and efficacy.

Objective:To investigate the effectiveness of case-based learning (CBL) combined with online teaching in standardized residency training of rheumatology and immunology.Methods:A total of 78 individuals who participated in standardized residency training in Department of Rheumatology and Immunology in our hospital from June 2019 to August 2020 were included and divided into observation group and control group. The individuals in the control group received traditional teaching, and those in the observation group received CBL combined with online teaching. The physicians receiving standardized residency training were evaluated by theoretical examination, clinical operation skill assessment, and instructor rating, and the degree of satisfaction with teaching, degree of satisfaction with teaching methods, and classroom learning atmosphere were also evaluated.Results:The observation group had a theoretical examination score of (94.10±2.01) and a clinical operation skill assessment score of (90.44±1.57), which were significantly higher than those of the control group ( P<0.05), and the observation group had a significantly better instructor rating (89.36±1.33) than the control group ( P<0.05). Compared with the control group, the observation group had significantly higher degree of satisfaction with teaching (3.79±0.41), degree of satisfaction with teaching methods (3.92±0.27), and evaluation of classroom learning atmosphere (3.90±0.31) ( P<0.05). Conclusion:CBL combined with online teaching can help to improve learning efficiency, stimulate the enthusiasm for learning, expand clinical thinking, promote the growth of teaching and learning, and form a virtuous cycle among trainees receiving standardized residency training, which holds promise for further exploration.

Humans ; COVID-19 ; Consensus ; SARS-CoV-2 ; China

Objective:To evaluate the association between thrombus composition and mechanical recanalization,operation procedure and clinical outcome.Methods:One hundred and ninety-two consecutive stroke patients with large-vessel occlusion treated by mechanical thrombectomy using a stent retriever and (or) aspiration catheter in the Affiliated Huaian No.1 People′s Hospital of Nanjing Medical University between January 2018 and January 2020 were collected. The retrieved thrombi were quantitatively analyzed for red blood cells, white blood cells, platelets, and fibrin. The patients were divided into two groups, a erythrocyte-rich group and a fibrin-rich group based on the predominant composition in the clot. The clinical prognosis, CT value of thrombus, procedure time,number of recanalization maneuvers, and degree of vascular recanalization were compared between the two groups.Results:The retrieved clot from 138 patients with acute ischemic stroke from internal carotid artery occlusion ( n=56), middle cerebral artery occlusion ( n=62), intracranial segment of vertebral artery or basilar artery occlusion( n=20) were histologically analyzed. Erythrocyte-rich clots were present in 59 cases, while fibrin-rich clots were present in 79 cases. Cardioembolic thrombi had higher proportions of fibrin/platelets [77.2%(61/79)], less erythrocytes than noncardioembolic thrombi [45.8%(27/59), χ2=8.115, P=0.004]. Patients with erythrocyte-rich thrombi had a smaller number of recanalization maneuvers [2 (1, 2) vs 3 (2, 4), Z=-7.613, P<0.001], shorter procedure time [45 (30, 60) min vs 80 (60, 90) min, Z=-6.944, P<0.001], higher thrombus CT value [42 (32, 53) vs 36 (31, 41), Z=-2.003, P=0.045], good clinical prognosis (the ratio of modified Rankin Scale score ≤2, 62.7% (37/59) vs 39.2% (31/79), χ2=7.444, P=0.006). There was no significant difference in the location of vascular occlusion between the two groups. Conclusion:For patients whose thrombotic components are mainly red blood cells, the cause of stroke may be non cardiogenic cerebral embolism, the CT value of embolus is relatively high, the embolus is easy to remove, and the clinical prognosis is relatively good.

Objective:To investigate the relations of thrombotic components with cause of stroke, procedure of mechanical thrombectomy, degrees of vascular recanalization and clinical prognoses in patients with large vessel occlusive cerebral infarction.Methods:One hundred and thirty-eight patients with large vessel occlusive cerebral infarction accepted mechanical thrombectomy using stent retriever and/or aspiration catheter in our hospital from January 2018 to January 2020 were chosen. These patients were divided into two groups, a erythrocyte-rich group and a fibrin-rich group, based on the predominant composition in the clots. The baseline clinical data, procedure time, number of recanalization maneuvers, degrees of vascular recanalization and clinical prognoses were compared between the two groups. The relations of infiltration degrees of erythrocytes and fibrin in embolus with procedure time were investigated.Results:The components of thrombus clots were mainly erythrocytes, fibrin, leukocytes, and platelets; erythrocyte-rich clots were presented in 59 patients, and fibrin-rich clots were presented in 79 patients. There was no significant difference in age, gender, preoperative NIHSS scores, proportions of hypertension, proportion of diabetes and proportion of vascular recanalization between the two groups ( P>0.05). As compared with patients from erythrocyterich group, patients in the fibrin-rich group had significantly higher proportion of cardioembolic thrombus (22.8% vs. 77.2%), statically larger number of recanalization maneuvers (2 [1, 2] times vs. 3 [2, 4] times), significantly longer procedure times (45 [30, 60] min vs. 80 [60, 90] min), and significantly lower proportion of patients with modifed Rankin scale (mRS) scores≤2 90 d after surgery (62.7% vs. 39.2%, P<0.05). Procedure time was negatively correlated with erythrocyte infiltration ( r= -0.562, P=0.005) and positively correlated with fibrin infiltration ( r=0.567, P=0.010). Conclusions:Different components of thrombus suggest the etiology of stroke may be different. Thrombus removal is relatively easy in patients with erythrocyte-rich clots, and the clinical prognosis is relatively good.

OBJECTIVE： To study the mechanism of couplet medicine of Tripterygium hypoglaucum-Spatholobus suberectus in the treatment of rheumatoid arthritis （RA）. METHODS： The RA targets were retrieved and obtained by therapeutic target database （TTD）， DrugBank and DisGeNET databases， and the protein protein interaction （PPI） network was constructed to screen its key targets. Using oral bioavailability（OB）≥30％， drug like（DL）≥0.18 and drug half-life （HL） ≥4 h as index， active components were obtained from couplet medicine of T. hypoglaucum-S. suberectus by using TCM systematic pharmacological analysis platform （TCMSP） and TCM integrated database （TCMID）， and the targets were predicted. The active component-target network of couplet medicine of T. hypoglaucum-S. suberectus was constructed. Systems Dock Web Site online platform and Genomics platform were used to screen the active component and common targets of RA of couplet medicine of T. hypoglaucum-S. suberectus； KEGG signaling pathways of common targets were analyzed by using Cluego plug-in unit of Cytoscape 3.2.1 software. RESULTS： Totally 1 956 RA targets were retrieved， involving 11 key targets [such as IL-6， TNF， VEGFA]. The couplet medicine contained 30 active components （including luteolin， erythroxanthin， β-sitosterol and triptolide） and 229 targets. There were 37 common targets for couplet medicine of T. hypoglaucum-S. suberectus and RA （including MMP2， TNF， VEGFA）. KEGG signaling way involved cell apoptosis， IL-17 signaling pathway， Th17 cell differentiation pathway and TNF signaling pathway. CONCLUSIONS： The couplet medicine of T. hypoglaucum-S. suberectus may play a role in the treatment of RA by acting on cell apoptosis， IL-17 signaling pathway and other signaling pathways through MMP2， TNF， and VEGFA target. The results of this study can provide a reference for further study on the mechanism of the effects of couplet medicine of T. hypoglaucum-S. suberectus on RA.

Objective: To realize the efficient monitoring of frequency of medical exposure and dose monitoring in Ningbo by means of informatization. Methods: Data transmission process and the key elements of frequency of medical exposure and individual dose were investigated. According to standardization principles of data elements, the standardized data elements for frequency of medical exposure and individual dose were determined. On this basis, modules and functions of data receiving platform on the frequency of medical exposure and individual dose in Ningbo were designed. Results: Totally 59 data elements on frequency of medical exposure and individual dose were formed. According to their functions, the data receiving platform was divided into the distribution of radiodiagnosis and radiotherapy resources, the frequency monitoring of medical exposure and dose monitoring for permanent residents, and the dose monitoring. Conclusions The establishment of frequency and dose information monitoring platform on medical exposure in Ningbo and the determination of standardized data elements will be conducive to further progress in medical exposure information monitoring in Ningbo.

Objective To validate and discuss the time response correction formula for four types of dosimeters (6150AD6 + 6150AD-b,FH40G + FHZ672E-10,451P ionization chamber and AT1123).Methods The ambient dose equivalent rates shown by survey meters were recorded separately when X-ray emission time was 500,200,100 and 50 ms.The corrected values were obtained by the formula of circuit having a capacitance C and asistance R in series.Results Therewas no correlation between the value measured by AT1123 dosimeter and the time of irradiation.The values by other three kinds of dosimeters obviously varied with the time of irradiation.Conclusions It is not required to make the time response correction for the measured value of ATl123 dosemeter,whereas the values measured by the other three dosimeters could be corrected by the time response correction formula.

Objective To prepare quercetin ( QT )-loaded polylactic-co-glycolic acid-D-α-tocopheryl polyethylene glycol 1000 succinate ( PLGA-TPGS) nanoparticles ( QPTN) and QT-loaded polylactic-co-glycolic acid ( PLGA) nanoparticles ( QPN) by using QT as model drug and PLGA-TPGS or PLGA as carrier materials, and to investigate the quality of the two nanoparticles. Methods QPTN and QPN were prepared by using the ultrasonic emulsification-solvent evaporation method, and their surface morphology,size and surface charge were detected by using a transmission electron microscope ( TEM) and a Nano ZS90 light scattering and laser Doppler anemometry, respectively. Drug loading ( DL) , entrapment efficiency ( EE) and in vitro drug release of QT in the two nanoparticles were determined by using a reverse phase-high performance liquid chromatography (RP-HPLC) on Hypersil C18 column (4.6 mm×250 mm, 5 μm) with methanol and 0.03% phosphoric acid (3︰2) as mobile phase, and the detective wavelength was 370 nm. Results TEM images exhibited that two nanoparticles were all spherical and regular. The average sizes of QPTN and QPN were (155.4±2.7) nm and (363.8±3.2) nm, while DL and EE of QPTN were approximately (21.6±2.8)%, (93.7±2.9)% (n=6), and DL and EE of QPN were approximately (15.0±1.5)%, (64.6± 1.6)% (n=6), respectively. Both of nanoparticles exhibited sustained release, and the cumulative QT release of QPTN and QPN reached (85.8±2.8)% and (68.6±1.4)% (n=6) at day 30, respectively, with a significant difference between them (P<0.05) . Conclusion QPTN gets smaller size, higher DL and EE, and exhibits sustained release, and the in vitro cumulative QT release is faster and more complete than QPN relatively.