ObjectiveTo investigate the changes of intestinal flora in children with food allergy and constipation by high-throughput sequencing， and to analyze the function of intestinal flora， to provide a basis for the prevention and treatment of food allergy and constipation in children. MethodsTotally 33 children with food allergy and constipation in Longgang District of Shenzhen were selected as the disease group （CPFA group）， another 59 healthy children of the same age were recruited as the HC group. Stool samples were collected and subjected to high-throughput sequencing of 16SrRNA genes， followed by bioinformatics analysis. Results① The species abundance of HC group was higher than that of CPFA group， and the diversity of intestinal microbial community was different between the two groups； ② At the phylum level， the relative abundance of Bacteroidota， Desulfobacterota in CPFA group was lower than that in HC group， and the relative abundance of Firmicutes， Actinobacteria and Proteobacteria in CPFA group was higher than that in HC Group（P< 0.05）； ③ At the genus level， the relative abundance of Bacteroids， Parabacteroides in the CPFA group was lower than that in the HC group， and the relative abundance of Bifidobacterium， Escherichia-Shigella and Veillonella in the CPFA group was higher than that in the HC group； ④ Functional analysis showed that there were significant differences in functional genes between the two groups. Compared with those in the HC group， the abundance of functional genes in valine， leucine and isoleucine biosynthesis， cysteine and methionine metabolism， fatty acid metabolism and Staphylococcus aureus infection were significantly increased in the CPFA group （P<0.05）. The abundance of functional pathways related to bile acid biosynthesis and retinol metabolism was significantly decreased （P<0.05）. ConclusionThere are differences in intestinal flora and function between children with CPFA and HC， which may help to explore the pathogenesis of food allergy and constipation， and provide a theoretical basis for new therapeutic interventions.

Objective To Explore the feasibility and value of deep learning technology for quality control of echocardiography images.Methods A total of 180985 echocardiography images collected from Sichuan Provin-cial People's Hospital between 2015 and 2022 were selected to establish the experimental dataset.Two task models of the echocardiography standard views quality assessment method were trained,including intelligent recognition of seven types of views(six standard views and other views)and quality scoring of six standard views.The predictions of the models on the test set were compared with the results of the sonographer's annotation to assess the accuracy,feasibility,and timeliness of the runs of the two models.Results The overall classification accuracy of the stan-dard views recognition model was 98.90%,the precision was 98.17%,the recall was 98.18%and the F1 value was 98.17%,with the classification results close to the expert recognition level;the average PLCC of the six standard views quality scoring models was 0.933,the average SROCC was 0.929,the average RMSE was 7.95 and the average MAE was 4.83,and the prediction results were in strong agreement with the expert scores.The single-frame inference time after deployment on the 3090 GPU was less than 20 ms,meeting real-time requirements.Conclusion The echocardiography standard views quality assessment method can provide objective and accurate quality assessment results,promoting the development of echocardiography image quality control management towards real-time,objective,and intelligent.

Objective: To evaluate the risk of fine particulate matter (PM2.5) on excess mortality among residents. Methods: The data of residential mortality in Yangzhou City, Jiangsu Province from 2015 to 2021 were collected from the Chinese Disease Prevention and Control Information System. The average daily mass concentration of PM2.5 and meteorology data were collected from the Yangzhou Environmental Monitoring Station and Yangzhou Meteorological Bureau, respectively. The effects of PM2.5 on non-accidental mortality, morality of respiratory diseases and mortality of circulatory diseases were evaluated using a generalized additive model. The risk of excess mortality was evaluated using excess risk (ER) and the number of excess mortality. Results: The median average annual mass concentration of PM2.5 was 38.00 (interquartile range, 31.95) µg/m3 in Yangzhou City from 2015 to 2021, decreasing from 51.75 (interquartile range, 32.82) µg/m3 in 2015 to 28.00 (interquartile range, 23.42) µg/m3 in 2021. The median average annual number of non-accidental mortality, mortality of respiratory diseases and mortality of circulatory diseases were 96 (interquartile range, 22), 9 (interquartile range, 5) and 38 (interquartile range, 13) cases, respectively. The greatest effects of per 10 μg/m3 increase in PM2.5 mass concentration on non-accidental mortality, mortality of respiratory diseases, and mortality of circulatory diseases were seen at a cumulative lag of 1 day (ER=0.528%, 95%CI: 0.293%-0.763%), a cumulative lag of 2 days (ER=0.917%, 95%CI: 0.125%-1.714%) and a cumulative lag of 1 day (ER=0.595%, 95%CI: 0.232%-0.961%), respectively. The number of excess mortality caused by PM2.5 on non-accidental mortality, mortality of respiratory diseases, and mortality of circulatory diseases in Yangzhou City from 2015 to 2021 were 2 125, 412 and 977 cases, respectively; compared with 2015, the number of excess mortality in 2021 decreased by 66.95%, 75.53% and 64.42%, respectively. Conclusions An increase in the mass concentration of atmospheric PM2.5 may elevate the risk of excess mortality among residents. Compared to 2015, the number of excess deaths attributed to exposure to atmospheric PM2.5 declined in 2021.

Humans ; Asthma/drug therapy* ; Biological Therapy

[摘 要] 目的：分析FOXD1在食管鳞状细胞癌（ESCC）组织中的表达及其与临床病理特征和患者预后的关系，探讨其对ESCC TE1细胞增殖、侵袭能力的影响及其对TGF-β1诱导TE1细胞EMT进程的影响。方法：采用qPCR和IHC法检测ESCC组织和细胞中FOXD1的表达，并分析其与临床病理特征和患者预后的关系；构建FOXD1敲减质粒并转染TE1细胞，检测其对TE1细胞增殖、侵袭能力的影响；用qPCR和WB法检测TGF-β1处理前后FOXD1及EMT相关基因和蛋白的表达变化及敲减FOXD1对EMT相关基因和蛋白表达的影响。结果：ESCC组织和细胞中FOXD1均呈高表达（均P<0.01），并与患者OS呈负相关；FOXD1表达水平、肿瘤TNM分期以及淋巴结转移均是影响ESCC患者预后的独立危险因素（均P<0.01）。TGF-β1可促进TE1细胞FOXD1的表达，并诱发其EMT进程（均P<0.05）；敲减FOXD1可抑制TE1细胞的增殖和侵袭能力，并可部分逆转由TGF-β1诱发的TE1细胞EMT进程。结论：FOXD1在ESCC组织及TE1细胞中呈高表达且是影响ESCC患者预后的独立危险因素，敲低FOXD1可显著抑制TE1细胞的增殖、侵袭及TGF-β1介导的EMT进程。

【Objective】 To investigate the matrix effect on the determination of potency in Recombinant Human Coagulation Factor Ⅷ for Injection (rFⅧ). 【Methods】 Two different detection matrices were used to establish two methods for detecting the potency in Recombinant Human Coagulation Factor Ⅷ for Injection. And the matrix effect on the determination of potency was determined, including specificity, linearity, repeatability, accuracy and intermediate precision. 【Results】 As to the specificity, the recoveries of the two substrates at high vs low concentration level were 112% and 110% vs 104% and 109%, respectively. As to the linearity, in the range of (0.125-1.000) IU/mL, the correlation coefficient between concentration and coagulation time of standard/ sample was higher than 0.99. As to the accuracy/repeatability, the recoveries of two matrices was 104% and 102%, and RSD was 2.4% and 1.9%. As to the intermediate precision, personnel factor of two matrices was 0.72 and 0.23, date factor was 0.79 and 0.85, and RSD(for 12 times) was 4.2% and 3.0%. Comparison of two matrices was as follows: Deviation in test results of 6 batches of rFⅧ was all lower than 5%. There was no significant difference between two matrices. 【Conclusion】 The two matrices for potency detection show good performance including specificity, linearity, repeatability, accuracy, and intermediate precision. They are suitable for the determination of potency in rFⅧ products.

Objective: To identify the characteristics including clinical features and pulmonary computed tomography (CT) features of heart failure and novel coronavirus pneumonia(COVID-19). Methods: This study was a retrospective study. A total of 7 patients with Heart failure and 12 patients with COVID-19 in the Second Xiangya Hospital of Central South University between December 1, 2019 and February 15, 2020 were enrolled. The baseline clinical and imaging features of the two groups were statistically analyzed. Results: There was no significant difference in age and sex between the two groups, but the incidence of epidemiological contact history, fever or respiratory symptoms in the COVID-19 group was significantly higher than that in the heart failure group (12/12 vs. 2/7, P=0.001; 12/12 vs. 4/7, P<0.001). While the proportion of cardiovascular diseases and impaired cardiac function was significantly less than that of the heart failure group(2/12 vs.7/7, P<0.001; 0/12 vs.7/7, P<0.001). For imaging features, both groups had ground-glass opacity and thickening of interlobular septum, but the ratio of central and gradient distribution was higher in patients with heart failure than that in patients with COVID-19 (4/7 vs. 1/12, P=0.04). In heart failure group, the ratio of the expansion of small pulmonary veins was also higher (3/7 vs. 0, P=0.013), and the lung lesions can be significantly improved after effective anti-heart failure treatment. Besides, there are more disease with rounded morphology in COVID-19 (9/12 vs. 2/7, P=0.048) . Conclusions More patients with COVID-19 have epidemiological history and fever or respiratory symptoms. There are significant differences in chest CT features, such as enlargement of pulmonary veins, lesions distribution and morphology between heart failure and COVID-19.

OBJECTIVETo assess the value of next generation sequencing (NGS) for the analysis of spontaneous abortion samples.

METHODSThe NGS analysis was carried out on 85 chorionic villi samples (taken between 42 days to 12 weeks of gestation) for which conventional cell culture has failed or chromosomal karyotyping has yielded normal or uncertain result.

RESULTSAmong 68 samples with a normal karyotype, the NGS analysis has identified 2 copy number variations (CNVs) and 2 chimeras. For 16 cases with failed cell culture, the NGS has identified 4 chromosomal abnormalities including 1 copy number variation and 3 numerical chromosomal aberrations. For 1 remaining case with uncertain karyotyping result, the NGS analysis has verified it as 46,XX,del(4) (p15.1p16.3).seq[GRCh37/hg19] (57 549 - 32 371 364)×1.

CONCLUSIONThe NGS analysis is capable of identifying novel CNVs in samples for which conventional cell culture may fail or karyotyping analysis may yield a normal result.

Abortion, Spontaneous ; genetics ; Adolescent ; Adult ; Cells, Cultured ; DNA Copy Number Variations ; Female ; High-Throughput Nucleotide Sequencing ; methods ; Humans ; Karyotyping ; Middle Aged ; Pregnancy ; Young Adult

Objective To investigate the protective effects of lipoxin A4 (LXA4) on the lung epithelial cells (MLE-12) in mice with hyperoxia injury.Methods MLE-12 cells were cultured in vitro and divided into air group,air + LXA4 group,hyperoxia group and hyperoxia + LXA4 group.The receptor of LXA4 (ALX) was verified by using reverse transcription-polymerase chain reaction (RT-PCR).MLE-12 cells were exposed to hyperoxia (＞ 850 mL/L oxygen concentration) for 12 h followed by pretreatment of 1 nmol/L,10 nmol/L and 50 nmol/L LXA4 for 1 h,6 h,12 h and 24 h.Quantitative real-time PCR (qRT-PCR) was applied to analyze the heme oxygenase 1 (HO-1) expression to determine the optimal concentration and the optimal pretreatment time of LXA4.The cell morphology was observed by using inverted microscope.The survival rates and cell viability were determined by using Trypan Blue stain and cell counting kit-8 (CCK-8).The superoxide dismutase (SOD) level was determined by using hydroxylamine method.The expressions of mRNA and protein of HO-1 were measured by using qRT-PCR,western blot and immunofluorescence assay,respectively.The interleukin-6 (IL-6) and monocyte chemotactic protein 1 (MCP-1) were determined by using enzyme-linked immunosorbent assay.Results ALX was expressed in MLE-12 cells.The optimal intervention concentration and time of LXA4 was 10 nmol/L for 12 h.Compared with air group [(84 ± 5) ％,1.22 ± 0.27,(5.33 ± 1.16) kU/L],the cell survival rate,viability and SOD level of hyperoxia group [(66 ± 8) ％,0.67 ± 0.21,(2.38 ± 0.65) kU/L] decreased,and the differences were significant (t =3.98,2.55,4.86;P =0.01,0.03,0.00);compared with the hyperoxia group,the cell survival rate,viability and SOD level of hyperoxia + LXA4 group [(88 ± 5) ％,1.43 ± 0.05,(6.50 ± 0.19) kU/L] significantly increased,and the differences were significant (t =4.83,3.52,6.78;P =0.01,0.02,0.00).The HO-1 mRNA and protein expression of hyperoxia group (0.57 ± 0.03,1.31 ± 0.11) increased as compared to air group (0.13 ± 0.03,0.24 ± 0.10),and the differences were significant (t =8.00,10.10;all P =0.00);the HO-1 expression of hyperoxia + LXA4 group (0.78 ± 0.08,1.82 ± 0.09) significantly increased as compared to hyperoxia group,and the differences were significant (t =3.94,8.82,all P=0.00).The levels of MCP-1 and IL-6 of hypemxia group [(1 025.18 ±35.51) rig/L,(1 136.65 ±160.01) ng/L] significantly increased as compared to air group [(467.63 ± 13.69) ng/L,(470.03 ± 118.22) ng/L],and the differences were significant (t =16.51,7.48;all P =0.00);the MCP-1 and IL-6 of hyperoxia + LXA4 group [(640.25 ± 61.03) ng/L,(655.48 ± 88.57) ng/L] significantly decreased as compared to hyperoxia group,and thedifferences were significant (t =11.40,5.40,all P =0.00).Conclusions LXA4 can attenuate hyperoxia-induced injury in MLE-12 cells.The protective role of LXA4 in the hyperoxia-induced cell injury is related to the up-regulation of HO-1 expression and down-regulation of IL-6 and MCP-1 levels.

Objective To construct a scoring system of combination of procalcitonin and C-reactive protein for diagnosis of invasive bacterial diarrhea in children. Methods The clinical data of hospitalized children with acute diarrhea were retrospectively analyzed. All of the children were divided into two groups, invasive bacterial diarrhea group and nonbacterial diarrhea group. The scoring system of combination of two markers for diagnosis of invasive bacterial diarrhea in children was constructed by means of two categories logistic regression analysis using procalcitonin and C- reactive protein as parameters. In addition,receiver operating characteristic curve(ROC)was used to evaluate the diagnostic accuracy.Results One hundred ten cases of invasive bacterial diarrhea and 108 cases of nonbacterial diarrhea were included. The levels of serum procalcitonin and C-reactive protein in invasive bacterial diarrhea group were significantly higher than those in nonbacterial diarrhea group, and there were statistical difference(P all<0.05).The area under the ROC curve(AUC)of invasive bacterial diarrhea was 0.894 when the established scoring system was used, which was higher than the AUCs when either serum procalcitonin or in C- reactive protein was used (P<0.05). The best diagnostic boundary value for combination of serum procalcitonin and C- reactive protein scoring was 0.52 with a sensitivity at 80.9% and specificity at 88.9%. Conclusions The scoring system of combination of procalcitonin and C- reactive protein has good accuracy in diagnosis of invasive bacterial diarrhea in children, and can assist the early diagnosis of the disease.