2.Assessment of cardiac twist in hypertrophic cardiomyopathy using velocity vector imaging
Xiaowei LIU ; Zhian LI ; Ya YANG
Chinese Journal of Ultrasonography 2009;18(11):929-933
Objective To assess global and regional cardiac twist function in hypertrophic cardiomyopathy(HCM) patients by velocity vector imaging(VVl).Methods Thirty HCM patients and 33 normal subjects were enrolled into this study.Two dimensional echocardiographic images of parasternal left ventricular basal level,middle and apical level short axis plane,apical four-and two-chamber plane were obtained.Maximal rotation degree,peak rotation rate,circumferential strain (CS) and strain rate (CSR),radial strain(RS) and strain rate(RSR) in systole were measured using VVI offline software.In addition,diastolic peak un-rotation rate,untwisting rate(unTwR) were measured.Each parameters was analyzed both in subendocardial and subepicardial layer.Results There was no significant difference in left ventricular ejection fraction between two groups.EDV,ESV,SV were significantly decreased (P<0.01) in HCM group.Left ventricular twist(LVtw),CS of subendocardial layer were higher in HCM group than control group(P<0.05),while the peak rotation rate,un-rotation rate,CS,CSR were lower of subepicardial layer (P<0.05).The RSR of each short axis level were significantly decreased in HCM group (P<0.01).The diastolic unTwR was decreased in HCM group (P<0.05).For further analysis of the two subgroups in HCM,more regional torsion deterioration occurred in patients with left ventricular outflow tract obstruction than those without obstruction.Conclusions The global cardiac twist angle of HCM was higher than normal person,but the circumferential deformation ability of regional myocardium was impaired,left ventricular outflow tract obstruction may aggravate the regional myocardial dysfunction.
3.Study on Immuniated Fnnction in Infants with Bronchiolitis
Journal of Applied Clinical Pediatrics 2003;0(10):-
Objective To explore the immuniated function of infants with bronchiolitis. Methods In vitro production of IL-18,12, 10, 4, IFN-? by peripheral blood mononuclear cells (PBMC) and plasma IgE of bronchiolitis infants measured by enzyme-linked im-munosorbent assay, expression of lymphocyte activation gene - 3 (LAG - 3) mRNA from PBMC measured by semi - quantitative RT- PCR.Forteen healthy children were as normal control. Results Compared with normal control, IL - 12 (390. 94 ? 95. 88 vs 452.44?195.07) ng/L and IL-18(146.23? 55. 81 vs 246.69?121.29) ng/L activity were significantly decreased (P0.05) ;The levels of IL-4(30. 52 ? 17. 65 vs 16.20? 8.94) ng/L and IL-10 (302. 40 ? 100.04 vs 195.30? 84.01) ng/L were elevated significantly(P
4.Establishment of risk prediction model for nosocomial infection in preterm very low birth weight infants
HU Yuanyuan ; LIU Ya ; HE Jiao ; YANG Xuejiao ; LIU Zhenzhen
China Tropical Medicine 2023;23(9):971-
Abstract: Objective To establish a risk prediction model for nosocomial infection in preterm very low birth weight infants, and conduct internal validation. Methods A total of 206 cases of very low birth weight premature infants hospitalized in the Department of Neonatology of Union Hospital Affiliated to Tongji Medical College from January 2018 to June 2020 were included in this study, factors that may affect the nosocomial infection of children were collected, and the infants were divided into two groups according to whether there is nosocomial infection. The influencing factors were compared between the two groups, and multivariate Logistic regression analysis was performed after screening variables with LASSO regression. According to the results of multi factor analysis, the nomogram model was constructed and verified internally. Results A total of 29 of 206 children had nosocomial infection (14.08%), and 33 pathogenic bacteria were detected, including 23 Gram-negative bacteria, 9 Gram-positive bacteria and 1 fungus. The results of multivariate logistic regression analysis based on LASSO regression showed that the risk factors for nosocomial infection of VLBW premature infants were 28-31+6 weeks of gestation, amniotic fluid pollution, mechanical ventilation, indwelling gastric tube, unreasonable use of antibiotics, and hospitalization time ≥ 7 days. The protective factors were Apgar score ≥ 7 points at 1 min and breast feeding accounting for 50% or more (P<0.05). The Area Under Curve (AUC) of ROC curve of nomogram model was 0.946 [95%CI(0.923, 1.000)]. The calibration curve showed that the probability of hospital infection predicted by the model was basically consistent with the actual probability. The decision curve showed that when the probability threshold of nomogram model to predict the risk of nosocomial infection of very low birth weight premature infants was 0-0.85, the net rate of return was greater than 0. Conclusion Preterm infants with extremely low birth weight are at high risk of nosocomial infection, mainly affected by factors such as gestational weeks, hospitalization time, amniotic fluid pollution, etc. The nomogram model constructed by the above factors has high accuracy and discrimination for predicting nosocomial infection in such children.
5.Based on evidence to establish reporting guidelines for TCM-featured acupuncture systematic reviews/Meta-analysis: a methodology discussion.
Ya-Jun WANG ; Ya-Li LIU ; Ke-Hu YANG ; Yi GUO
Chinese Acupuncture & Moxibustion 2014;34(12):1231-1234
Existing reporting guidelines for systematic reviews/Meta-analysis (SRs/MAs) cannot meet the requirements of clinical practice and scientific research, so based on evidence, methods and thoughts on establishing reporting guidelines for TCM-featured acupuncture systematic reviews/Meta-analysis were proposed. Through literature analysis, according to evidence-based principle, preliminary ideas on methodology of establishing reporting guidelines for TCM-featured acupuncture systematic reviews /Meta-analysis were proposed. With consensus as one main research method, it was proposed that in the consensus that was selected and established by experts, the pro- portion of Chinese scholars should be increased to fully declare the opinions of Chinese acupuncturists, and by verification of practice and application, the reporting guidelines for TCM-featured acupuncture systematic reviews/Meta-analysis can be finally made.
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7.Preliminary study on anti-fatigue effects of enzymatic hydrolyzed animal protein extracted from Pinctada martensii
Chaohua ZHANG ; Ya LIU ; Ping YANG ; Jing ZHANG ; Hongwu JI
Chinese Journal of Marine Drugs 1994;0(04):-
Objective To study the anti-fatigue effects of enzymatic hydrolyzed protein from Pinctada martensii.Methods Swimming time,contents of liver glycogen and serum urea nitrogen after swimming were determined.Results Three dosages of EPA were all able to prolong swimming time and decrease liver glycogen consumption and serum urea nitrogen content after exhausted swimming in various degree.Conclusion The EAP has evident anti-fatigue effects.
8.Meta analysis of integrated Chinese-Western medicine therapy for type 2 diabetes mellitus
Lina YANG ; Yi LONG ; Hongyan LI ; Ya LIU
Journal of Jilin University(Medicine Edition) 2006;0(02):-
Objective To systematically compare the effects of integrated Chinese-Western medicine(ICWM) with Western medicine alone(WM) in treatment for type 2 diabetes mellitus(T2DM).Methods Both a computer-aided search of PubMed,CNKI,VIP,Wanfang data and an intensive search by hand were conducted to identify all randomized controlled trials assessing the effect of ICWM with WM in treating T2DM and Meta-analysis was performed.Results Ninety six studies were collected,of which 20 studies were involved.Combined OR of efficient rate was 4.26 and its 95% confidence interval(CI) was 3.42-5.32,weighted mean difference(WMD) of fasting blood glucose(FBG),triglyceride and total cholesterol were-1.16 mmol?L-1[95%CI-1.36,-0.96],-0.27 mmol?L-1 [95%CI-0.41,-0.12],-0.71 mmol?L1 [95%CI-0.98,0.44],respectively.Conclusion ICWM has a better effect in treating T2DM compared with WM alone.
9.EGCG upregulated ABCA1 expression by decreasing miR-33 a generation to reduce lipid accumulation of macrophage-derived foam cells
Hongxia YANG ; Ya GAO ; Hengbo JIANG ; Lushan LIU
Chinese Pharmacological Bulletin 2016;32(9):1279-1283,1284
Aim To investigate whether EGCG regu-lates ABCA1 expression by influencing the expression of miR-33 a to promote cholesterol efflux from macro-phages. Methods THP-1 macrophage-derived foam cells were established by co-incubated with oxLDL, and then treated with EGCG, and miR-33a expression was detected with Real-time PCR. THP-1 macrophage-derived foam cells were randomly divided into the fol-lowing groups: control group, 50 μmol · L-1 EGCG treatment group, 50 μmol · L-1 EGCG +80 nmol · L-1 miR-33a mimic treated group. Real-time PCR and Werstern blot was used to detect ABCA1 mRNA and protein expression, Oil Red O staining and high per-formance liquid chromatography were used to detect in-tracellular lipid content, and [3H] assay was used to determine cellular cholesterol efflux. Results EGCG could downregulate miRNA33 a expression in a dose-and time-dependent fashion within safe doses. EGCG significantly upregulated ABCA1 mRNA and protein expression, which could be inhibited after miRNA33 mimic transfected into cells, however. EGCG may re-duce lipid accumulation in THP-1 macrophage-derived foam cells, and this effect could also be weakened after miRNA33 mimic transfected. EGCG could reduce the accumulation of intracellular cholesterol,which was re-lated with EGCG promoting intracellular cholesterol ef-flux , and excess miRNA33 a transfected into cells could inhibit intracellular cholesterol efflux. Conclusion EGCG may upregulate ABCA1 expression by reducing miRNA33a generation, resulting in the promotion of cholesterol efflux from macrophages, which may be one of the molecular mechanisms of EGCG anti-atheroscle-rotic effect.
10.Modification,Expression and Purification of Human Endotoxin Binding Peptide Gene
Ya-Li SUN ; You-Sheng LIU ; Hai-Jie YANG ;
China Biotechnology 2006;0(03):-
Objective: To modify EBP(endotoxin binding peptide), clone and express the mutate of EBP gene and gain purified mEBP.Method: mEBPgene was cloned by PCR site-directed mutagenesis. PinpointXa-3/mEBP expression vector was designed to express human mEBP as a fusion protein in BL21 (DE3) pLysS. Digested engineering bacteria by lysozyme and collected inclusion bodies.Fusion protein was purified by Pinpoint TM Xa purification system and cleaved by factorXa,mEBP was purified by RP-HPLC. Results: Mutations at residues 5 and 18(Gln→Lys) was obtained by PCR site-directed mutagenesis, expressed and purified mEBP successfully.Conclusions: Obtaining of purified mEBP lay a foundation for its biological activity research.