Objective To investigate the modulation of affective pictures on experimental tonic cold and heat pain in a behavioral study. Methods Fifteen healthy female subjects went through the tonic cold and tonic heat stimulation when watching the affective pictures in a counter-balanced order after the pictures were grouped into the pleasant, the unpleasant and the neutral picture sets. The pain tolerance time ( PTT ) was recorded.Results The tolerance time was prolonged when watching the pleasant and unpleasant pictures contrast to thatwhen watching the neutral ( Unpleasant ( 146.20 ± 13.68 ) s, Neutral ( 86. 73 ± 12.93 ) s, Pleasant ( 145.27 ±15.99 ) s, F(2,42) = 5.718, P ＜ 0.01 ) ). However, no significant difference was observed in the heat pain test under the different experimental conditions ( Unpleasant ( 74.73 ± 15.78 ) s, Neutral ( 68.80 ± 15.85 ) s, Pleasant ( 78.80± 14.81 )s, F(2.42) =0. 109, P＞0.05) ). A correlation between the residual difference of arousal in pleasant and neutral picture sets and the residual difference of heat PTT in pleasant and neutral picture sets was investigated (r = 0.546, P = 0.035 ). Conclusion Besides the emotional valence,the arousal may be one of the key elements that modulate the tonic pain.

Objective To investigate the effect of mental processing speeds of judging traffic lights varying in location and color meaning. Methods 20 healthy adult male (age: 18 ～30 years) were enrolled in this study. By simulation of traffic lights as picture stimuli, all subjects performed a Go/NoGo task separately under normal condition, location-reversed condition, color meaning-reversed condition and both location and color meaning-reversed condition randomly. The accuracy rate and reaction time of the behavior task were quantified. Results The average accuracy rate of the four conditions was 99. 13% , no differences were found in different traffic light colors and different conditions. In the normal condition,the subjects' reaction time(ms) of traffic lights were as fallowings: red light 491.59 ±71.74; green light 487.55 ±58. 11, no difference was found between the two traffic light colors (P=0.522). In the location-reversed condition, subjects' average reaction time(ms) was respectively for red light 606.29 ± 107.59, and green light 593.13 ± 102.45. In the color meaning-reversed condition, it was respectively for red light 572.08 ±78.75, and green light 592.43 ±87.58. Compared with the normal condition, subjects' reaction time was prolonged in the location-reversed condition (F(1,19)=59.77, P<0.01), and also in the color meaning-reversed condition (F(1,19) =52.55, P<0.01). When in the both location and color meaning-reversed condition, the subjects' reaction time (ms) of traffic lights was respectively 502.92 ± 65.27 for red light, and 508.97 ±63.40 for green light,the result came close to statistical significance(P= 0.065)compared with the normal condition. Conclusion A likely "conceptual constancy" is demonstrated on the basis of prolonging the brains' information processing when location and color information changes.

Extracurricular activities are necessary to curricular study and significant in quality and practical ability education for medical students.Research and practice on how to improve the interest in extracurricular activities for medical students were carried out,and good results were achieved in the aspect of the development of teaching efficiency.

Objective To compare the predicted efficiency ofmacular hole closure index (MHCI) calculated by 2 different methods for postoperative anatomical outcomes after idiopathic macular hole (MH) surgery.Methods This is a prospective exploratory clinical study.A total of 63 patients (63 eyes) with idiopathic MH,who received vitrectomy,inner limiting membrane peeling and gas tamponade,were enrolled in this study.All the patients received optical coherence tomography (OCT) examination at each visit to measure the MHCI using the formula MHCI=(M+N) /BASE,M and N is the distance from outer limiting membrane break points to the beginning points of detached photoreceptor from retinal pigment epithelium of both side of the hole,respectively.BASE is the length of MH base.MHCI1 was measured by built-in caliper of OCT software,MHCI2 was measured by ImageJ software.The minimum macular diameter (MHD) was measured by built-in caliper of OCT software.Based on the OCT images,the anatomical outcomes were classified grade A (bridge-like shape closure),grade B (complete closure) and grade C (poor closure).Grade A and B are considered as good closure,grade C as poor closure.Patients were followed up at 3,6 and 12 months after surgery.The closure grades at last visit were the final outcome.The relationship between MHCI 1,MHCI2 and closure grades was analyzed.And the predicted efficiency of MHD,MHCI1 and MHCI2 for anatomical outcomes after the surgery was studied.Results The mean MHCI1 was 0.68±0.21 (0.30-1.35),MHCI2 was 0.95±0.26 (0.41-1.55),and MHD was (476.24±210.18) μm (127-956 μm).MHCI1 and MHCI2 were both negative correlated with the closure grades (r=-0.665,-0.691;P＜0.001).The receiver operating characteristic (ROC) curve analysis ofMHCI1,MHCI2 and MHD for the prediction of good or poor closure showed that area under the curve (AUC) was 0.928,0.957 and 0.916 respectively,and 0.505,0.67 and 559 μm were set as the lower cut-offvalue.The sensitivity was 96.2％,92.3％ and 90.9％ respectively,and specificity was 81.8％,72.7％ and 76.9％ respectively.Accordingly,the ROC curve analysis for the prediction of grade A or B closure showed that AUC was 0.840,0.847 and 0.653 respectively,and 0.705,0.965 and 364 μm were set as the upper cut-off value.The sensitivity was 80.0％,82.9％,63.4％ respectively and specificity was 75.0％,85.7％,65.9％.Conclusion MHCI1 and MHCI2,measured by built-in caliper of OCT software or ImageJ software,both have good predictive efficiency for the anatomical outcomes of MH surgery.

OBJECTIVETo investigate the effects of nano-lead exposure on learning and memory and iron homeostasis in the brain of the offspring rats on postnatal day 21 (PND21) and postnatal day 42 (PND42).

METHODSTwenty adult pregnant female Sprague-Dawley rats were randomly divided into control group and nano-lead group. Rats in the nano-lead group were orally administrated 10 mg/kg nano-lead, while rats in the control group were administrated an equal volume of normal saline until PND21. On PND21, the offspring rats were weaned and given the same treatment as the pregnant rats until 42 days after birth. The learning and memory ability of offspring rats on PND21 and PND42 was evaluated by Morris water maze test. The hippocampus and cortex s amples of offspring rats on PND21 and PND42 were collected to determine iron and lead levels in the hippocampus and cortex by inductively coupled plasma-mass spectrometry. The distributions of iron in the hippocampus and cortex were observed by Perl's iron staining. The expression levels of ferritin, ferroportin 1 (FPN1), hephaestin (HP), and ceruloplasmin (CP) were measured by enzyme-linked immunosorbent assay.

RESULTSAfter nano-lead exposure, the iron content in the cortex of offspring rats on PND21 and PND42 in the nano-lead group was significantly higher than those in the control group (32.63 ± 6.03 µg/g vs 27.04 ± 5.82 µg/g, P<0.05; 46.20 ±10.60 µg/g vs 36.61 ± 10.2µg/g, P<0.05). The iron content in the hippocampus of offspring rats on PND42 in the nano-lead group was significantly higher than that in the control group (56.9 ± 4.37µg/g vs 37.71 ± 6.92µg/g, P<0.05). The Perl's staining showed massive iron deposition in the cortex and hippocampus in the nano-lead group. FPNl level in the cotfex of offspring rats on PND21 in the nano-lead group was significantly lower than that in the control group (3.64 ± 0.23 ng/g vs 4.99 ± 0.95 ng/g, P<0.05). FPN1 level in the hippocampus of offspring rats on PND42 in the nano-lead group was significantly lower than that in the control group (2.28 ± 0.51 ng/g vs 3.69 ± 0.69 ng/g, P<0.05). The escape latencies of offspring rats on PND21 and PND42 in the nano-lead group were longer than those in the control group (15.54 ± 2.89 s vs 9.01 ± 4.66 s; 6.16 ± 1.42 s vs 4.26 ± 1.51 s). The numbers of platform crossings of offspring rats on PND21 and PND42 in the nano- lead group were significantly lower than those in the control group (7.77 ± 2.16 times vs 11.2 ± 1.61 times, P<0.05; 8.12 ± 1.51 times vs 13.0 ± 2.21 times, P<0.05).

ONCLUSIONn Nano-lead exposure can result in iron homeostasis disorders in the hippocampus and cortex of offspring rats and affect their learning and memory ability.

Animals ; Cerebral Cortex ; drug effects ; metabolism ; Female ; Hippocampus ; drug effects ; metabolism ; Homeostasis ; Iron ; metabolism ; Lead ; toxicity ; Learning ; drug effects ; Maternal Exposure ; adverse effects ; Memory ; drug effects ; Pregnancy ; Rats ; Rats, Sprague-Dawley

Objective To summarize the clinical characteristics of children with coronary artery aneurysms (CAA) and thrombosis in Kawasaki disease (KD),in order to explore the safe and effective thrombolytic therapy and its prognosis.Methods The clinic,treatment and follow-up data of 210 patients with KD between January 2006 and December 2016 were retrospectively reviewed in the Department of Pediatrics,Union Hospital,Tongji Medical College,Huazhong University of Science and Technology.The clinic signs and laboratory data for CAA with thrombosis were analyzed.The characteristics of CAA were monitored by tltrasound.All KD patients with thrombus received intravenous antithrombotic therapy,including urokinase,heparin,and oral Warfarin,and anti-platelet treatment.The effectiveness of antithrombotic treatment was evaluated by measuring the ability to dissolve the thrombus.Results Fourteen cases in 210 patients with KD developed CAA,and had associated thrombosis.In these 14 patients,the largest diameter of CAA was 18.5 mm,and the average value was 12.6 mm.There was no special blood analysis in CAA with thrombus.Moreover,typical KD symptoms and acute myocardial infarction were not found in CAA with thrombosis.Thrombus occurred in giant aneurysms,and 2 patients had multiple thrombosis.After thrombolytic therapy,12 cases in the 14 patients had successful thrombolysis,2 patients had thrombus organization and coronary artery stenosis.Conclusions Neither clinical features nor laboratory data could reliably predict CAA associated thrombosis.Thrombus was easily formed in giant CAA.Frequent and periodly follow-up are important to detect thrombosis in KD patients with giant coronary artery.Therapy with adequate intravenous antithrombotic therapy and anti-platelet treatment earlier can effectively dissolve thrombus in KD patients,and avoid deterioration.

Objective: To analyze the usage and influencing factors of quantified recipes in schools in the pilot areas of the Nutrition Improvement Program for Rural Compulsory Education Students (NIPRCES), and to provide references for student meal quality improvement. Methods: In 726 national pilot counties in 22 provinces where the NIPRCES was implemented, a total of 7 808 schools were included in the analysis as the survey objects in 2019. Data, including the usage of quantified recipes in schools and related factors, were collected through questionnaires. Multivariate Logistic regression was used to analyze the influencing factors of the schools use of quantified recipes. Results: Among the national pilot counties where the NIPRCES was implemented, 66.6 % of the monitored schools used quantified recipes, of which 69.7% of schools in the central region used quantified recipes, it was higher than that in the west region(65.2%) ( χ 2=15.13, P <0.01). Multivariate Logistic regression analysis showed that factors such as the schools in the central region, county based schools, the training frequency of canteen with 1-2 times per semester or once or more per month, regular training of nutrition knowledge, recipes provided by other departments, consideration of nutrition matching when formulating recipes, using catering software, providing local dietary allowances were positively correlated with the use of quantified recipes in schools( OR=1.31,0.72,1.44,1.73,1.75,3.20,2.15,2.72,1.17,P <0.05). Conclusion The proportion of using quantified recipes of schools in the NIPRCES area was relatively low, which might be affected by factors including the regional economic level, canteen training, and recipes sources. It is recommended to strengthen the construction of professional teams and canteen training. Schools need to be encouraged to use quantified recipes and promote school catering scientifically to improve healthy growth of students.

Objective: To analyze the status of parents sharing meal expenses in the national pilot areas of the Nutrition Improvement Program for Rural Compulsory Education Students (NIPRCES) and its influencing factors, so as to provide scientific data for promoting the proper implementation of the NIPRCES and the healthy development of students. Methods: In the 726 national pilot counties in 22 provinces where the NIPRCES was implemented, 8 109 primary and junior high schools were selected as the survey objects and included in the analysis according to the three feeding methods of canteen feeding, enterprise feeding and mixed feeding. Data such as the basic information of the schools and counties, and the status of parents sharing meal expenses were collected through questionnaires. Multivariate Logistic regression analysis was used to analyze the influencing factors of parents sharing meal expenses. Results: In the national pilot areas of the NIPRCES, schools where parents shared meal costs accounted for 30.2% of all monitored schools in 2019. In central and western areas, the proportion of schools where parents shared meal costs were 51.5% and 20.3%, respectively. In schools where parents shared meal costs, no matter in primary school or junior high school, the difference in the amount of meal expenses shared by parents of students in middle and western schools was statistically significant ( χ 2= 181.78 , 89.54, P <0.01). Among 38.7% of the parents of primary school students in the central region shared meal expenses of ≥2 yuan, and 47.5% of the parents of primary school students in the western region. Multivariate Logistic regression analysis showed that the parents of schools in the central region, junior high schools or nine year system schools, canteen feeding or other feeding, large school size, the nutritious meal subsidy used for lunch, middle and high family income level, medium and low input level of the monitoring counties, monitoring counties with other nutrition public welfare projects and insufficient working funds share a higher proportion of meal expenses ( OR=3.22, 1.51, 1.36, 1.74, 3.74, 1.38, 11.58, 2.40, 3.15, 1.50, 2.12, 3.36, 1.34, P < 0.05). Conclusion The proportion of meals shared by parents of school students in the NIPRCES implementation area was relatively low, which may be affected by factors such as economic level, feeding mode, school scale, etc.

AIM:We investigated how AT 1-R stimulated by mechanical stresses induces cardiac fibrosis .METHODS:We produced in vivo cardiac pressure overload model in angiotensinogen knockout ( ATG-/-) mice and in vitro mechanically-stretched cell model in cultured neonatal cardiac cells of ATG-/-mice both lack the participation of Ang II .RESULTS: Pressure overload for 4 weeks in ATG-/-mice induced myocardial hypertrophy accompanied by the significant interstitial fibrosis , however , the TGF-β, a key regulatory factor of fibrosis, was not significantly increased in these ATG-/-mice.Meanwhile, the inhibitor for AT1-R significantly inhibited mechani-cal stress-induced cardiac fibrosis in these ATG-/-models whereas inhibition of TGF-βdid not.CONCLUSION:The results showed that mechanical stress-induced fibrotic responses through AT 1-R required the phosphorylation of Smad 2 but not the involvement of TGF-β.

Objective To improve the survival rate and life quality of peritoneal dialysis(PD)patients,we es-tablished a retraining model based on ADDIE model,including optimizing the content,form and frequency.Methods From January 1,2022 to May 3,2023,based on the 5 stages of ADDIE model,we investigated the needs of pa-tients,invited 55 experts in the peritoneal dialysis field to design the final draft of the retraining model through 2 rounds of Delphi expert consultations,and 23 peritoneal dialysis patients were preexperimented to evaluate and re-vise the retraining model.Results The questionnaire recovery rates of the 2 rounds of expert consultation were 100％and 96.36％,respectively.The coordination coefficients of the first-level catalog were 0.379 and 0.384,and the coordination coefficients of the second-level catalog were 0.446 and 0.427,respectively.The Chi-square test showed that P＜0.05,indicating statistical significance.The content of the retraining model included 4 sections,33 subdirectories and 9 training forms,which were combined online and offline.The training frequency was different due to the different contents,and the single content of a single training form was mainly 15 min.Conclusion The PD patient retraining model constructed in this study is scientific,reliable and innovative.Its content is easy to un-derstand and diverse in forms.The training duration and frequency are in line with the memory rule,and the eval-uation takes into account both process and result.