Objective To explore the interactions between human leukocyte antigen ( HLA)-DRB1 gene polymorphism and environmental risk factors in gestational diabetes mellitus ( GDM ) pathogenesis.Methods Pregnant women who had prenatal cares in Obstetric Department , West China Second Hospital of Sichuan University were recruited from January 1st to December 31st in 2011.A prospective cohort study was conducted in the women who had a glucose challenge test ( GCT) or 75 g oral glucose tolerance test ( OGTT) during 24-28 gestational weeks.A total of 104 women diagnosed with GDM were randomly included in GDM group while another 103 normal women fell into the control group.The HLA-DRB1 polymorphism was detected by Polymerase Chain Reaction -Sequence Specific Primers ( PCR-SSP) method in both groups.The interactions between HLA-DRB1 polymorphism and environmental risk factors were analyzed based on the simple-case-study method.Results ( 1 ) There were 712 pregnant women with complete perinatal information during January 1st to December 31st, 2011, among whom 175 (24.6%) women were diagnosed with GDM.A logistic regression analysis showed that advanced maternal age (OR=1.081, 95%CI:1.027-1.138), imbalanced diet (OR=3.329, 95%CI:2.167 -5.116), high body mass index (BMI≥24.0 kg/m2) before pregnancy (OR=1.095, 95%CI:1.008 -1.190), HBsAg carrier status (OR=3.173, 95%CI:1.387-7.260) and family history of diabetes mellitus (DM) (OR=1.798, 95%CI:1.063 -3.041) were risk factors of GDM.(2) There were 49 HLA-DRB1 genotypes and 51 HLA-DRB1 genotypes in GDM group and the control group , respectively.We further compared the genotypes that occurred in over 3 cases in either group and found that HLA-DRB1*12,16 was only detected in 5 cases (5/103, 4.9%) in control group,and the difference was significant between the two groups (P=0.029).HLA-DRB1*11,16 and HLA-DRB1*09,09 were only detected in 4 cases (3.8%,4/104) and 5 cases (4.8%, 5/104) in GDM group respectively , but without significant differences between the two groups ( P >0.05 ).No significant difference was found in other genotype frequencies between the two groups ( P>0.05 ).( 3 ) Thirteen types of HLA-DRB1 allele were detected but no significant differences were observed in their frequencies between two groups ( P>0.05).(4) A positive interaction was detected between HLA-DRB1*07 polymorphism and advanced maternal ages (OR=5.952, 95%CI:1.314-26.970, P=0.022), while no interaction was found between HLA-DRB polymorphisms to other risk factors such as imbalanced diet , high body mass index ( BMI≥24.0 kg/m2 ) , HBsAg carrier status or DM family history.Conclusions Advanced maternal age, unbalanced diet, high body mass index (BMI≥24.0 kg/m2), HBsAg carrier status and DM family history are environmental risk factors of GDM in Chengdu.While HLA-DRB1*12,16 genotype may be a protective genotype for GDM.There is a positive interaction between HLA-DRB1*07 polymorphism and advanced maternal age which may play a critic role in GDM development.

Objective To investigate the risk factors of peripartum hysterectomy in placenta previa through retrospective study of 3 840 placenta previa cases. Methods The clinical data of 3 840 patients with placenta previa who delivered in West China Second University Hospital between Jan 2005 and June 2014 were analyzed retrospectively. The relationship of certain factors and peripartum hysterectomy was analyzed, including maternal age, residence place, parity, prior curettage, prior cesarean section, twin or multiple pregnancy, antenatal vaginal bleeding, type of placenta previa, suspected placenta accreta, antenatal level of hemoglobin and gestational age at delivery. Results The prevalence of placenta previa was 4.84% (3 840/79 304) in West China Second University Hospital during the study period, and the incidence of preipartum hysterectomy in patients with placenta previa was 2.76% (106/3 840). One-factor analysis demonstrated that residence place, parity, times of prior curettage, prior cesarean section, prenatal vaginal bleeding, anterior placenta, type of placenta previa, placenta accreta, antenatal anemia and gestational age at delivery were potential risk factors for peripartum hysterectomy (P<0.01). Variables with P<0.1 in one-factor analysis were introduced to multi-factor logistic regression analysis, which suggested that one prior cesarean section (OR=12.9,95%CI:6.3-26.3), two or more prior cesarean sections (OR=14.4, 95%CI:3.9-53.2), anterior placenta (OR=4.8, 95%CI:2.1-10.7), complete placenta previa (OR=5.9, 95%CI:1.8-42.5), placenta accreta (OR=11.2, 95%CI:6.8-18.6), antenatal hemoglobin<100 g/L (OR=1.7, 95%CI:1.0-2.8) and delivery before 34 gestational weeks (OR=3.2, 95%CI:1.6-6.3) were independent risk factors of peripartum hysterectomy in patients with placenta previa (P<0.05). Conclusions Prior cesarean section, anterior placenta, complete placenta previa, placenta accreta, antenatal anemia and delivery before 34 gestational weeks are high risk factors of peripartum hysterectomy in placenta previa patients. Perinatal care and risk evaluation before cesarean section are important to improve perinatal outcomes and reduce peripartum hysterectomy.

Objective To identify and evaluate the important risk factors for preeclampsia.Methods Databases of PubMed,Web of Science,Ovid CBM,China Knowledge Resource Integrated Database,Wanfang and VIP Database were searched from January 1,1990 to December 31,2012 to collect the cohort and case control studies involving the risk factors for preeclampsia.According to the inclusion and exclusion criteria,data of the included studies were extracted.Meta-analysis was performed using Stata 12.0 software with DerSimonian Laird model to calculate OR and its 95％CI of each risk factor.Results A total of 20 studies involving 53 393 patients in the research group and 1 197 773 cases in the control group were included.Fifteen risk factors for preeclampsia were investigated,including:history of preeclampsia (OR=10.27,95％CI:7.67-13.75),complication with chronic kidney diseases(OR=4.69,95％CI:1.94-11.33),history of chronic hypertension (OR-3.47,95％CI:2.39 5.04),multiple pregnancy (OR-2.98,95％CI:2.43-3.66),pre pregnancy body mass index (BMI) ≥ 25(OR=2.47,95％CI:1.97 3.09),maternal hyperglycemia(gestational diabetes and pre existing diabetes)(OR=2.84,95％CI:2.28-3.55),primiparity (OR=2.47,95％CI:2.12-2.82),physical work during pregnancy (OR=1.62,95％CI:1.30-2.02) ; family history of hypertension (OR=2.14,95％CI:1.84-2.50),basic diastolic blood pressure ≥ 70 mmHg (OR=2.17,95％CI:1.44-3.27),low education levels less than junior school (OR=1.69,95％CI:1.34 2.15),basic systolic blood pressure ≥ 120 mmHg (OR=2.31,95％CI:1.86-2.86),urinary tract infection (OR=1.96,95％CI:1.54-2.48),maternal age ≥ 35 or ≤ 20 years (OR=1.43,95％CI:1.29 1.57) and mental ademosyne (OR=1.35,95％CI:1.24-1.47).In addition,smoking before or during pregnancy was found to decrease the incidence of preeclampsia (OR-0.66,95％CI:0.56 0.79).Conclusions The main risk factors for preeclampsia are:history ofpreeclampsia,complication with chronic kidney diseases,history of chronic hypertension,multiple pregnancy,pre-pregnancy BMI ≥ 25,maternal hyperglycemia,primiparity,work during pregnancy and family history of hypertension.Smoking may decrease the incidence of preeclampsia.Nevertheless,more emphasis should be laid the adverse perinatal outcomes of smoking.

Objective To investigate the effects of different glucose concentration on EGR2 protein expression in Schwann cells . Methods Schwann cells were cultured in different glucose concentrations ,and they were divided into two groups ,normal glucose concentration (5 .5 mmol/L ,N group) and high glucose concentration(25 mmol/L ,H group) .Immunocytochemistry and Western blot were used to study EGR2 expression .Results The expression of EGR2 protein was higher in H group than that in N group the difference was statistically significont (P<0 .05) .Conclusion High glucose can lead to EGR2 protein upregulate in Schwann cells ,and EGR2 maybe one of the reasons of diabetic neuropathy .

Objective To explore the effect of hepatitis B virus(HBV) on the expression of complement 3 (C3) and complement 4 (C4) and its regulatory mechanism.Methods Differentially expressed genes between HepG2 and HepG2.2.15 cells was screened by gene chip,serum complement component 3 (C3) and 4 (C4) levels in patients with HBV infection and in healthy individuals were measured by Immunoturbidimetry,HBV infectious clone pHBV1.3 was transfected into HepG2 cells,and expression of C3 and C4 was measured by RT-PCR and Western blot.Results Expression of C3 and C4 mRNA was lower in HepG2.2.15 cells than in HepG2 cells,serum C3 and C4 levels was much lower in patients with chronic hepatitis B and hepatic carcinoma as compared to healthy individuals (P＜0.05 ).HBV could downregulate the expression of C3 and C4 at mRNA and protein levels.Conclusion HBV may inhibit the expression both in vivo and in vitro.

Objective To explore the clinical characteristics and pregnancy outcomes of twin pregnancies complicated with severe preeclampsia.Methods The pregnant outcomes of 131 twin pregnancies (twin group) and 572 singleton pregnancies (singleton group),all complicated with severe preeclampsia,were analyzed retrospectively.All patients were treated in the Department of Obstetrics and Gynecology,West China Second University Hospital,Sichuan University from June 2007 to June 2011.The patients' age,onset of disease,gestational weeks at delivery,mean duration of expectant treatment,blood pressure,laboratory parameters and incidence of pregnancy complications,including placental abruption,heart failure,pulmonary edema,postpartum hemorrhage,uteroplacental apoplexy,eclampsia,HELLP syndrome (hemolysis,elevated liver enzymes and low platelets syndrome),hypoproteinemia,retinopathy,intracranial hemorrhage and renal insufficiency,were compared between the two groups.Perinatal outcomes such as premature delivery,perinatal mortality,neonatal intensive care unit (NICU) hospitalization,fetal distress,hypoxic-ischemic encephalopathy (HIE),asphyxia neonatorum,neonatal pneumonia,hyperbilirubinemia and neonatal hypoglycemia of two groups were also compared.Chi-square test,Fisher's exact test or t-test were used for statistical analysis.Results The severe preeclampsia incidence of twin pregnancies (5.03％,131/2604) was higher than that (1.94％,572/29 452) of singleton pregnancy (x2=106.40,P＜0.001).The onset time [(33.6±1.8) weeks] and gestations at delivery [(34.6±2.9) weeks] in twin group were earlier than those in singleton group [(34.4± 2.0) weeks,t=2.364,P＜0.05; (35.6±3.2) weeks,t=3.902,P＜0.05].The duration of expectant treatment of twin group [(6.4±0.3) d] were shorter than that of singleton group [(7.4± 0.5) d,t=5.314,P＜0.01].The incidence of placental abruption [9.9％ (13/131) vs 4.2％ (24/572),x2=7.013,P＜0.01],heart failure [11.5％ (15/131) vs 3.2％ (18/572),x2=16.430,P＜0.01],pulmonary edema [4.6％ (6/131) vs 0.9％ (5/572),x2=9.505,P＜0.01],postpartum hemorrhage [16.0％ (21/131) vs 7.0％ (40/572),x2 =10.990,P ＜ 0.01] and uteroplacental apoplexy [5.3％ (7/131) vs 0.5％ (3/572),x2 =17.650,P＜0.01] of twin group were higher than those of singleton group,respectively.The incidence of premature delivery [77.1％ (202/262) vs 29.9％ (171/572),x2=162.000,P＜0.05],NICU hospitalization [76.2％ (205/262) vs 58.4％(332/572),x2 =31.980,P＜0.05] and HIE [8.4％ (22/262) vs 4.7％ (27/572),x2 =4.392,P＜0.05] of twin group were higher than those of singleton group,respectively.Conclusions Twin pregnancy women are more likely to be complicated with severe preeclampsia and more vulnerable to suffer from severe complications,resulting in poor perinatal outcomes.More attentions should be paid on the management of twin pregnancy.Once hypertensive disorders complicating pregnancy is diagnosed,active management should be provided and timing of termination should be considered.

Objective To explore the effects of low serum-albumin on maternal and neonatal outcomes in severe pre-eclampsia. Methods Two hundred and thirty-three women with severe preeclampsia admitted to our hospital from Jan. 2000 to Mar. 2006 were retrospectively investigated and were divided into two groups according to the serum-albumin level: low serum-albumin group (Group A, n= 133) and normal serum-albumin group (Group B, n=90). Maternal and fetal outcomes were compared between the two groups. Results The proportion of women with abnormal retention of fluid (6.8%, vs 0), elevated liver enzymes (60.9% vs 38.9%) renal involvement (30.1% vs 11.1%) and complications (23.3% vs 11.1%) (placental abruption and postpartum hemorrhage) in group A were significantly higher than those in group B (all P<0. 05). Birth weight in group A was lower than that in group B[(2192. 78±795. 31) g vs (2454. 92±776. 24) g, P<0. 05] and neonatal mortality in group A was higher (26.0%vs 13. 6%, P<0. 05). Conclusions Severe pre-eclampsia with low serum-albumin is associated with severe maternal and neonatal outcomes. Appropriate termination of pregnancy should be considered following adequate and careful assessment of maternal and fetal well-being in order to improve perinatal outcomes.

Objective To explore the clinical significance of serum concentrations of Cystatin C (CysC) in children with kidney disease in different disease courses. Methods The serum concentrations of CysC, creatinine(Cr) and endogenous creatinine clearance rate(Ccr) were determined in 182 children with kidney disease. They were divided into five study groups:normal renal function group (73 cases), compensatory renal disfunction group (44 cases), non-compensatory renal disfunction group (35 cases), renal failure group(22 cases) and end stage of renal failure group(8 cases). Meanwhile 70 healthy children were involved in control group. Relationships among CysC, Cr and Ccr were calculated and the diagnostic efficiency was assessed by comparing the areas under the ROC curves. Results The serum concentrations of CysC increased in different courses of renal function impairment in children and were significantly related to the severity of impairment. CysC was positively correlated to Cr and negatively correlated to Ccr. The areas under the ROC curves of Cr and CysC were 0.764 and 0.725. Conclusions The serum concentrations of CysC can accurately identify different impairment grades of renal function and the function of glomerular filtration. As an indicator of early reduction of renal function, its sensitivities and specificities are superior to Cr and Ccr. CysC can be a sensitive endogenous marker for glomerular filtration rate determination. With simple, convenient and applicable assays methods, CysC is essential for early diagnosis of children kidney diseases.

Objective To study the effects of light on body weight,learning and memory of mice.Methods Fifty mice aged 20 days were randomly assigned to one of the five groups: 200 W light group,100 W light group,60 W light group,40 W light group and normal control group,with 10 in each.They were exposed to different intensities of light 8 hours per day for 1 week.Then we monitored their body weight,examined the mean latency and inaccuracy number in step-down test,and examined the mean latency using a Morris' water maze to observe the effect of light pollution on the mice's learning and memory.Results Compared with the other four groups,there were significant decelerations of body weight increase in 200 W light group.No significant difference in body weight gain was found among the other four groups.The four light-treatment groups had no significant differences from control group in the mean latency,inaccuracy number in step-down test or the mean latency,or the mean crosses to the target in the Morris' water maze.Conclusion Short time high-intensity light can inhibit body weight increase in mice,but short-time light has no effect on the learning and memory of mice.

Objective To establish a model of pancreatic cancer(PC)in SD rats,and to study the changs of serum levels of AMS and TNF-? and the significances.Methods Dimethylbenzanthracene(DMBA)was directly implanted into pancreatic parenchyma of SD rats(experimental group,group A),and in the process of establishing PC,weekly TSA by 1P was done in intervention group(group B).The tumor development of rats executed within 3～5 months in Group A and Group B were observed by HE staining and gross examination.Meanwhile,the rats in the sham operation group(Group C)were executed at 5 months.The levels of serum AMS were detected by autobiochemical assay apparatus,and the levels of serurn TNF-? were determined by ELISA.Results(1)The incidence of pancreatic cancer in Group A within 3～5 months was 48.7%(18/37),including 17 cases of pancreatic ductal adenocarcinoma and 1 case of fibrosarcoma.The incidence of pancreatic cancer in Group B was 33.3%(12/36),including 11 pancreatic ductal adenocarcinoma and 1 case of fibrosarcoma.The maximal diameter of tumor mass in Group A was higher than that in Group B((P