环氧合酶-2调控血管内皮生长因子表达的研究

目的 环氧合酶-2参与肿瘤的发生发展，但其在致癌过程中的作用机制尚不清楚。对胚胎小鼠成纤维细胞中不同基因型的环氧合酶(COX)，如COX-1^-/-/COX-2^-/-及野生型COX-1^ / ／COX-2^ / 与血管内皮生长因子(VEGF)表达的关系进行探讨。方法 培养小鼠胚胎成纤维细胞，用ELISA方法测量细胞中VEGF水平，从培养的细胞中提取mRNA，用RT-PCR技术确定VEGF的表达。结果 在COX-2基因缺失(COX-2^-/-)细胞中几乎测不出VEGF，而在含有COX-2基因(COX-2^ / )的细胞中VEGF水平明显增高，抑制剂赛来昔布(celecoxib)能抑制VEGF。VEGF的水平与COX-1无关。COX-2在mRNA水平调控VEGF的表达。结论 COX-2在VEGF的分泌与合成中起重要作用，从而影响肿瘤新生血管生成及肿瘤生长。     

Validating the Psychometric Characteristics of the Perinatal Posttraumatic Stress Disorder Questionnaire (PPQ) in a Chinese Context

Background

Perinatal posttraumatic stress disorder (PPTSD) is a common stress-induced mental disorder worldwide. The Perinatal Posttraumatic Stress Disorder Questionnaire (PPQ) is an excellent questionnaire that measures the symptoms of PPTSD, but has not been translated into Chinese yet.

Apigenin ameliorates vascular injury in rats with high fructose-induced metabolic disturbance by inhibiting PI3K/AKT/GLUT1

The abuse of fructose in daily diet may cause cardiovascular diseases that seriously threaten human health, and both safe and efficient solutions need to be developed. We investigated whether apigenin can prevent the harmful impact of excessive fructose on cardiovascular events. Based on the reduction of percentage of body fat and systolic pressure as well as the improvements in insulin resistance, lipid metabolism, and pathological injury to the thoracic aorta, we suggested that high levels of fructose cause vascular injury and metabolic disorders, which can be improved to some extent by using apigenin. Fundamentally, apigenin down-regulates levels of phosphoinositide 3-kinase (PI3K), protein kinase B (AKT), and glucose transporter 1 (GLUT1), which increase with high concentrations of fructose. Moreover, the inflammation and asymmetric dimethylarginine (ADMA) levels increased in fructose group, but they decreased when the rats were fed with apigenin. The results suggest that PI3K/AKT/GLUT1 may have potential for alleviating cardiovascular injury, and apigenin can be an excellent candidate for supplements to ameliorate cardiovascular diseases related to high fructose consumption.

(A) Chemical structure of apigenin. (B) Graph illuminating the experimental design for the time course of fructose and apigenin administration, and the timelines for the histological studies, biochemical analysis and western blot analysis.     

Low molecular weight heparin and aspirin for prevention of deep vein thrombosisafter orthopaedic surgery: a systematic review and meta-analysis

Journal of Thrombosis and Thrombolysis - To comprehensively evaluate the clinical effects of low molecular weight heparin (LMWH) and aspirin for deep vein thrombosis (DVT) patients after...     

一种感染性非人灵长类实验装置的生物安全研究

目的 拟设计一种在无操作时能完全隔离感染动物,又能在日常照料动物时形成定向气流的实验装置,保证非人灵长类动物正常生物学特性表达的同时还能有效防止气溶胶感染。方法 使用具有氯霉素抗性的大肠杆菌(Cl+, E.coli, Rosetta菌株)作为指示微生物,观察处于本实验装置中非人灵长类在实验中的生物学特性,并采用气溶胶采集装置及沉降菌采集的方法对本实验装置内外的指示微生物进行监测。结果 在内笼指示菌富集时,本实验安全装置的外笼无论在开启还是关闭状态下,房间内、笼外及外笼均未检测到指示菌及气溶胶。结论 本实验装置能保证非人灵长类正常生物学特性的表达,并可有效防止气溶胶感染。     

浙江省衢州地区鼠类携带莱姆病螺旋体研究

目的 了解衢州市鼠类携带莱姆病螺旋体状况以及莱姆病螺旋体基因型。方法 采用针对莱姆病螺旋体5S~23S基因间隔区的巢式PCR方法检测鼠脾标本,对阳性样本进行基因测序及分析,构建系统发育树。结果 在378份鼠标本中检出莱姆病螺旋体核酸阳性57份,阳性率15.08%。有Borrelia garinii(B.g)基因型、Borrelia valaisiana(B.v)基因型Borrelia spielmanii(B.sp)基因型。结论 衢州境内鼠类存在至少3个型别莱姆病螺旋体感染,应加强该病原体的检测和莱姆病的防制。     

Impact of hepatitis B virus infection on maternal and infant outcomes of women with gestational diabetes mellitus: A three-year retrospective study

AimsTo explore the impact of HBV infection on maternal and infant outcomes of GDM women.MethodsWe retrospectively identified 8126 women with GDM in China from July 2017 to June 2020, and divided them into GDM with HBV infection group (n = 483) and GDM with non-HBV infection group (n = 7643). Two sample t-test and Chi-square test were used to compare differences between groups. Logistic regression models were used to explore the association between HBV infection and maternal and infant outcomes.ResultsPlacental abruption (PA), (2.3% vs. 1.0%, P = 0.008), placenta previa (4.3% vs. 2.8% p = 0.044), intrahepatic cholestasis of pregnancy (ICP), (6.4% vs. 3.0%, P < 0.001), cesarean section (52.0% vs. 46.0%, P = 0.011), fetal chromosomal abnormalities (1.2% vs. 0.4%, P = 0.021), and neonatal hyperglycemia (1.9% vs. 3.6%, P = 0.047) were more likely to occur in GDM with HBV infection group. After adjusting for the covariates, HBV infection was found to be associated with ICP (aOR, 2.35; 95% CI: [1.58–3.50]), PA (aOR, 2.34; 95% CI: 1.22–4.47), and fetal chromosomal abnormalities (aOR, 2.88; 95% CI: 1.18–7.03).ConclusionsHBV infection was associated with part of maternal and infant outcomes in the GDM population.     

The effects of Chinese herb Angelica in focal cerebral ischemia injury in the rat

This experiment was designed to study the therapeutic mechanisms of Angelica on the focal cerebral ischemia injury of the rat. The ischemic area was determined by TTC stain. And terminal deoxynucleotidyl transferase (TDT) mediated DUTP-biotin nick end labeling (TUNEL) method was applied to detect neuronal apoptosis. The expressions of Bcl-2 and Bax proteins were observed by immunohistochemical staining methods. Results show that the treatment with angelica reduced the volume of cerebral infarction (p < 0.05), and that the number of neuronal apoptosis cells decreased significantly (p < 0.01). Also the expression level of Bax protein decreased (p < 0.01). These results suggest that Angelica can reduce the number of apoptosis cells by decreasing the expression of Bax protein. This is maybe one of the mechanisms of the therapeutic effect of Angelica on focal cerebral ischemia injury.