Objective: To investigate the factors affecting spontaneous preterm birth in singleton pregnancy, so as to provide insights into reducing the risk of preterm birth. Methods: A total of 230 lying-in women with spontaneous preterm birth in singleton pregnancies admitted to the Hangzhou Obstetrics and Gynecology Hospital were selected as the case group, and lying-in women with full-term birth in singleton pregnancies in the hospital during the study period were selected as controls. Basic information and pregnancy status were collected through the hospital information system, and factors affecting spontaneous preterm birth in singleton pregnancies were analyzed using a multivariable logistic regression model. Results: The lying-in women in the case group had a mean age of (33.40±3.16) years and a mean gestational weeks at delivery of (34.72±2.15) weeks. The lying-in women in the control group had a mean age of (28.30±3.92) years and a mean gestational weeks at delivery of (39.84±2.09) weeks. Multivariable logistic regression analysis identified age of 35 years and older (OR=1.280, 95%CI: 1.022-1.603), induced abortion three times and above (OR=3.122, 95%CI: 1.368-7.121), history of preterm birth (OR=3.769, 95%CI: 1.725-8.240), premature rupture of membranes (OR=12.708, 95%CI: 4.836-33.391), gestational hypertension (OR=2.934, 95%CI: 1.313-6.550), gestational diabetes (OR=2.510, 95%CI: 1.249-5.038) and cervical canal length ≤25 mm (OR=5.832, 95%CI: 2.380-14.279) as factors affecting spontaneous preterm birth in singleton pregnancies. Conclusion Spontaneous preterm birth in singleton pregnancy may be associated with age, number of induced abortions, premature rupture of membranes, complications in pregnancy and cervical canal length.

Objective To explore the level of free fatty acid (FFA)in ischemic stroke (IS) patients and its correlation with insulin resistance (IR).Methods This study was case-control study.Patients who were diagnosed with IS were followed up from June,2011 to September,2012 in Tianjin Third Central Hospital.The 180 IS patients were divided into large infarct(57),middle infarct(63)and small infarct (60) according to the area of infarct.At the same time,60 healthy persons were selected as control group.The plasma FFA,fasting insulin (FINS),fasting blood glucose (FBG),homeostasis model assessment (HOMA)-IR,triacylglycerol (TG),total cholesterol (TC),high density lipoprotein cholesterol-C (HDL),low density lipoprotein cholesterol-C(LDL),lipoprotein A1 (APOA1) and lipoprotein B (APOB) in 180 IS patients were measured and compared with that of control group.The correlation between FFA and IR was analyzed by using pearson linear correlation.The relationship between FFA and HOMA-IR was analyzed by using multiple stepwise multivariate analysis.The t test and analysis of variance were used for statistical analysis.Results Compared to normal control,the level of FFA,FINS,FBG,FIB,TG,TC,LDL,APOB and HOMA-IR in IS patients were higher,the difference was statistically.The level of HDL,APOA1 in IS patients were lower than that of normal control.The level of FFA,FINS,HOMA-IR,FBG,TG,TC,HDL,LDL,APOA1 and APOB in IS patients related to the area of infarct.The level of FFA,FINS,HOMA-IR,FBG,TG,TC,LDL,APOB in large infarct were higher than those in middle infarct and small infarct.The level of HDL,APOA1 in large infarct were lower than those in middle infarct and small infarct,the difference were statistically.In IS patients,FFA had positive correlation to FINS,FBG and HOMA-IR (r =0.870,0.497,0.792,P ＜ 0.001),but had no correlation to age (r =0.008,P ＞ 0.05).In IS patients,HOMA-IR was dependent variable,but FFA,FINS,FBG,TG,TC,HDL,APOA1 and APOB were independent variable.FFA was independent risk factor to HOMA-IR,besides FINS,FBG,TC,LDL and APOB.Conclusion FFA elevates in IS patients,FFA has correlation to IR and it is a dependent risk factor to IS patients.

Objective To investigate the effect of β-catenin on the osteogenic differentiation of human periodontal ligament stem cells (PDLSCs) under mechanical tension.Methods PDLSCs were seperately cultured in vitro from the periodontium attached at freshly extracted teeth.β-catenin-targeting agonist or inhibitor was applied to the PDLSCs to upregulate or downregulate the expression of activity of β-catenin protein.The expression of β-catenin protein and the osteogenetic related markers(ALP,BMP2,Runx 2) under the mechanical tension with different period(0,6,12,24 h) were assessed with Western blot in the PDLSCs irritated with agonist or inhibitor.Results Compared with the PDLSCs without mechanical tension,the expression of osteogenesis related marker proteins,ALP and Runx 2,in PDLSCs were enhanced under the circular mechanial tensile stress (P ＜ 0.05).In the PDLSCs irritated with WAY-262611,the β-catenin-targeting agonist,the expression of osteogenetic related markers ALP in the PDLSCs was improved during the first 12 h period of mechnical tensile load,which was significantly higher than that in the DMSO group.Conclusion Wnt/β-catenin signaling pathway plays an important role in the early osteogenesis differentiation of PDLSCs under cyclic tension.The β-catenin promotes osteogenic differentiation of PDLSCs under mechanical tension.

Objective To investigate the association of nitrotyrosine with coronary heart disease (CHD) in type 2 diabetes mellitus.Methods The nitrotyrosine levels were determined in 109 patients of type 2 diabetes mellitus without CHD (T2DM).One hundred and fifty-two patients of type 2 diabetes mellitus with CHD (T2DM-CHD) and 103 healthy control subjects by ELISA.Results T2DM-CHD patients had significantly increased nitrotyrosine compared with T2DM group and the control group [ ( 78.17±10.68 )nmol/L,(70.50 ± 9.13) nmol/L vs ( 63.23 ± 11.55 ) nmol/L,Ps ＜ 0.01 ].Nitrotyrosine was correlated with total cholesterol,triglyceride,fasting glucose and Gensini Score (r=0.361,P=0.009;r =0.206,P=0.001 ;r=0.347,P=0.026; r=0.466,P ＜ 0.001 ).Multivariable logistic regression showed nitrotyrosine was independently associated with CHD combined with type 2 diabetes mellitus ( OR=1.094,95％ CI:1.053-1.137 ; P ＜ 0.01 ).Conclusion Nitrotyrosine plays an important role in the formation and development of cardiovascular disease in tvoe 2 diabetes.

Objective:To evaluate the relationship between red blood cell distribution width (RDW) and metabolic syndrome (MS) in patients with impaired glucose tolerance (IGT).Methods:A total of 415 patients with abnormal glucose tolerance were screened by oral glucose tolerance test in Changsha Traditional Chinese Medicine Hospital (Changsha Eighth Hospital) from October 2015 to September 2019. General data were collected and blood routine and biochemical indexes were detected. There were 193 cases in the observation group and 222 cases in the control group. The RDW and other clinical indicators were compared between the two groups, the correlation between RDW and other indicators was analyzed, and the risk factors of metabolic syndrome were analyzed.Results:⑴ The RDW, systolic blood pressure (SBP), diastolic blood pressure (DBP), height (Ht), weight (Wt), waist circumferenc (Wc), triglyceride (TG), cholesterol (CHOL), low density lipoprotein (LDL), creatinine (Cr), uric acid (UA), alanine aminotransferase (ALT), high sensitive C-reactive protein (hs-CRP), body mass index (BMI) of the observation group were significantly higher than those of the control group, while the high density lipoprotein (HDL) was significantly lower than that of the control group, with statistically significant difference ( P<0.05); ⑵ correlation analysis showed that RDW was positively correlated with SBP, DBP, Ht, Wt, Wc, TG, CHOL, Cr, UA, ALT, hs-CRP, BMI, and negatively correlated with HDL ( P<0.05); ⑶ binary logistic regression analysis showed that RDW, Wt, Wc, CHOL, HDL, LDL and hs-CRP were independent risk factors for MS in patients with impaired glucose tolerance. Conclusions:The increase of RDW is a predictor of metabolic syndrome in people with abnormal glucose tolerance, which may provide some reference value for the prevention and treatment of metabolic syndrome.

Objective To up-regulate the expression of Glil gene in periodontal ligament stem cells ( PDLSCs) and to explore the effect of Glil gene on PDLSCs proliferation and osteogenesis differentiation by establishing Glil gene adenovirus vectors. Methods Subcloned Glil to viral backbone vector Adtrack-CMV and transfered the established vector to 293T cells, which was to acquire the virus particles. Trans-fected aim cells,namely PDLSCs,with these virus. Detected its effect on PDLSCs proliferation with CCK-8 assay, and detected the expression of Glil and the bone-related markers ALP and Runx2 through Western blot. Results An adenovirus vector, which were over expressed Glil gene, was successfully constructed and transfected to PDLSCs. Compared with the empty vector group and normal group, the over expressed one had a much slower proliferation rate in CCK-8 assay (P=0. 003). Western blot showed that ALP and Runx2 can be overexpressing os-teogenic differentiated after PDLSCs successfully transfected with the Glil gene. Conclusion Over expressing Glil gene would lead to a much slower proliferation rate in the PDLSCs and an increase of the bone-related markers. It is concluded that Glil can enhance the osteogenic dif-ferentiation capacity in PDLSCs.

Objective To explore the relationship between optical coherence tomography (OCT) characteristics and peripheral blood leukocyte count in patients with acute myocardial infarction(AMI). Methods A total of 33 patients with AMI hospitalized in Fuwai Hospital for primary percutaneous coronary intervention were consecutively enrolled,and underwent intracoronary OCT procedures after manual aspiration of coronary thrombus. Demographic data, risk factors, procedural and OCT data, past medical history and perioperative laboratory findings were collected in all patients. Results The lymphocyte count,monocyte count and basophil count were significantly higher in the patients with fibrous cap thickness ≥ 65 μm than in those patients with fibrous cap thickness ≤ 65 μm. Patients presenting with cholesterol crystallization had lower eosinophil count than those patients with crystallization-free [(0.04±0.06)×109/L vs.(0.10±0.09) ×109/L,P =0.028]. In addition,the former had significantly higher to neutrophil lymphocyte ratio than the latter [(8.35±6.13)vs.(4.97±2.01), P =0.020]. Higher monocyte count was found in the patients with calcified plaque (P <0.05). Platelet to lymphocyte ratio was significantly increased in the patients with macrophage infiltration [(165.72±85.93)vs.(113.47±19.13),P <0.05]. The leukocyte count,neutrophil count and monocyte count showed the treat of elevation as the number of OCT characteristics increased,but only the elevation of monocyte count had statistical significant level (P = 0.014). Conclusions Peripheral blood leukocyte count seems to be associated with OCT characteristics of plaque rupture in patients with acute myocardial infarction,suggesting the potential role of inflammation in plaque rupture.

To investigate the effects of 2-(4-methoxycarbonyl-2-tetradecyloxyphenyl)carbamoylbenzoic acid (CX09040) on protecting pancreatic β cells, the β cell dysfunction model mice were induced by injection of alloxan into the caudal vein of ICR mice, and were treated with compound CX09040. Liraglutide was used as the positive control drug. The amount and the size of islets observed in pathological sections were calculated to evaluate the β cell mass; the glucose stimulated insulin secretion (GSIS) test was applied to estimate the β cell secretary function; the oral glucose tolerance test (OGTT) was taken to observe the glucose metabolism in mice; the expressions of protein in pancreas were detected by Western blotting. The effects on the target protein tyrosine phosphatase 1B (PTP1B) were assessed by the PTP1B activities of both recombinant protein and the intracellular enzyme, and by the PTP1B expression in the pancreas of mice, separately. As the results, with the treatment of CX09040 in alloxan-induced β cell dysfunction mice, the islet amount (P<0.05) and size (P<0.05) increased significantly, the changes of serum insulin in GSIS (P<0.01) and the values of acute insulin response (AIR, P<0.01) were enhanced, compared to those in model group; the impaired glucose tolerance was also ameliorated by CX09040 with the decrease of the values of area under curve (AUC, P<0.01). The activation of the signaling pathways related to β cell proliferation was enhanced by increasing the levels of p-Akt/Akt (P<0.01), p-FoxO1/FoxOl (P<0.001) and PDX-1 (P<0.01). The effects of CX09040 on PTP1B were observed by inhibiting the recombinant hPTP1B activity with IC50 value of 2.78x 10(-7) mol.L-1, reducing the intracellular PTP1B activity of 72.8% (P<0.001), suppressing the PTP1B expression (P<0.001) and up-regulating p-IRβ/IRβ (P<0.01) in pancreas of the β cell dysfunction mice, separately. In conclusion, compound CX09040 showed significant protection effects against the dysfunction of β cell of mice by enlarging the pancreatic β cell mass and increasing the glucose-induced insulin secretion; its major mechanism may be the inhibition on target PTP1B and the succedent up-regulation of β cell proliferation.

Objective To explore the continuity nursing effect of WeChat platform on PICC patients with intermittent chemotherapy. Methods 150 patients with primary PICC intubation tumor were selected as the study object, and were divided into three groups according to the order of treatment, each group of 50 cases. The control group adopted the traditional health education mode; the observation group 1 pushed PICC catheter maintenance related content three times a week based on WeChat platform on the basis of routine health education, and the observation group 2 on the basis of routine health education pushed PICC catheter maintenance related content, collected questions three times and answered questions for everyone in the Weixin group. The PICC self-management ability and incidence of catheter-related complications of the three groups were compared after 3 months. Results The scores of PICC self-management ability in the three groups were (133.84±5.67), (142.36±8.62) and (148.76±6.52). There was significant difference in the scores of PICC self-management ability between the three groups (F=56.384, P<0.05). The incidence of catheter-related complications in the three groups were 14% (7/50), 4% (2/50) and 2% (1/50), respectively, and the difference was statistically significant (χ2=6.643, P<0.05) between the three groups. The incidence of catheter-related complications was statistically significant only in the control group compared with the observation group 2 (χ2=4.891, P<0.05). Conclusions Continuous nursing based on Weixin platform can improve the self-management ability of PICC catheterization patients during the intermittent period of chemotherapy. Continuous nursing based on Weixin group chat can reduce the incidence of catheter-related complications, which is worthy of wide clinical recommendation.

Objective To investigate positive picobirnaviruses(PVBs)infection and its association with unex-plained diarrhea in children. Methods From January to December 2015,the Clinical Microbiology Testing Center of Xuzhou Central Hospital as the sampling location,7 PVB reverse transcription - polymerase chain reaction(RT - PCR)- positive fecal samples with diarrhea were collected from children under 6 years old and 4 samples from healthy chil-dren were obtained and all the samples were analyzed by viral metagenomics to investigate the relationship between PVBs and diarrhea in children. Phylogenetic analysis of RdRp in the isolated PVB sequences was carried out to clarify the relationship between PVB classification and diarrhea. Results All the 7 diarrhea feces contained high titers of PVB sequences,while 3 of the controls were negative,and 1 with low titers of PVB. RdRp analysis was carried out on the iso-lated PVB sequences,which displayed that 7 RdRp sequences caming from 7 fecal samples separately,so named ChXz- 1 to ChXz - 7 respectively. Phylogenetic analysis based on the predicted amino acid sequences of RdRp from this study and whole RdRp sequences available in the GenBank database indicated that the 7 RdRp sequences belonged to 3 genogroups,in which ChXz - 1,ChXz - 2,ChXz - 3 belonging to genogroup Ⅰ,ChXz - 4,ChXz - 5,ChXz - 7 belong-ing to genogroup Ⅱ,and ChXz - 6 belonging to genogroup Ⅲ. Conclusions PVBs might be the cause of diarrhea in children in this study,and all the 3 different PVBs may lead to diarrhea.