Effects of H2 O2 on endometrial stromal cells in the decidual mouse / 医学研究生学报

Objective Among the factors affecting embryo implantation, oxidative stress is one that receives much medical attention. The purpose of the study was to explore the effect of H2 O2 on the endometrial stromal cells ( ESCs) in the decidual mouse model of oxidative stress of ESCs. Methods Primary ESCs cultured by enzymatic digestion with a mesh filter were divided into a control, an experimental, and a model group. Decidualization was induced in the mice of the experimental and model groups by inter-vention with 10 nM E2 and 1μmol/L P4 for 72 h in vitro. Then, the animals of the model group were treated with different concentra-tions of H2 O2 for 4 hours. The primary ESCs were identified by immunohistochemistry, the expression of dPRP mRNA determined byRT-PCR, the proliferation of the decidual ESCs treated with H2 O2 analyzed by CCK-8, and the level of ROS detected by flow cytometry. Results Primary mouse ESCs were successfully isolated, cultured, and identified, which were shaped like spindles and polygons, radial-ly aligned under the microscope. Immunofluorescence analysis showed positive expression of vimentin and negative expression of cytokeratin. The purity of the primary mouse ESCs was ( 96. 3 ± 0. 49 )%. Theexpression of dPRP mRNA was significantly higher in the ESCs treated with E2 and P4 than in the control (0.0002±0.0000 vs 1.0010±0.0011, P<0.01). H2O2 at ≥150μmol/L suppressed the proliferation of the decidual ESCs by 6.9% (P<0.05), and in a concen-tration-dependent manner, reaching the maximum inhibition rate of 70.6% at the concentration of 300μmol/L. The level of intracellular ROS was markedly increased in the ESCs treated with H2O2 at 50μmol/L (27.77±4.20) and 100μmol/L (43.57±6.58), with statisti-cally significant difference from that in the control group (17.47±0.61) (P=0.001). Conclusion H2O2 at 100μmol/L can signifi-cantly elevate the intracellar ROS level without affecting the proliferation of decidual primary ESCs, and therefore can be used for estab-lishing the model of oxidative stress of ESCs in decidual mice.

Value of99mTcO4- and99mTc-MIBI imaging with ultrasound scoring method in diagnosis of thyroid nodules / 中国癌症杂志

Background and purpose:At present, color Doppler ultrasound scoring and radionuclide imaging are two important imaging methods for diagnosing thyroid nodules, but their checking principle is different. Which method is better? Or combining them will be the best method for diagnosing thyroid nodules? This study aimed to compare the value of99mTcO4- combined with99mTc-methoxyisobutylisonitrile (MIBI) imaging, ultrasound scoring method and ultrasound scoring method+99mTcO4-+99mTc-MIBI imaging in diagnosis of thyroid nodules.Methods:The results of ultrasound scoring method and99mTcO4- combined with99mTc-MIBI imaging were compared in 50 patients with 54 thyroid nodules, and then compared with pathological findings. The sensitivity, specificity, accuracy, positive predictive value (PPV) and negative predictive value (NPV) of the methods were calculated.Results:A total of 54 thyroid nodules were found pathologically including 20 malignant and 34 benign nodules. The sensitivity, specificity, accuracy, PPV and NPV of99mTcO4- combined with99mTc-MIBI imaging were 80.00% (16/20), 70.59% (24/34), 74.07% (40/54), 61.54% (16/26), 85.71% (24/28), re-spectively. Those of ultrasound scoring method were 80.00% (16/20), 88.24% (30/34), 85.16% (46/54), 80.00% (16/20), 88.24% (30/34), respectively. And those of ultrasound scoring method+99mTcO4-+99mTc-MIBI imaging were 100.00% (20/20), 64.71% (22/34), 77.78% (42/54), 62.50% (20/32), 100.00% (22/22), respectively. The sensitivity of ultrasound scoring method+99mTcO4-+99mTc-MIBI imaging was higher than ultrasound scoring method or99mTcO4-+99mTc-MIBI imaging along (100.00%vs 80.00%, 100.00%vs 80.00%,χ2 value was 4.444 4 and 4.444 4,P value was 0.035 0 and 0.035 0, respectively). The specificity of ultrasound scoring method was higher than those of two methods combined together (88.24%vs 64.71%,χ2 value was 5.230 8,P value was 0.022 2). However, no factorial negative thyroid nodule was found by ul-trasound scoring method+99mTcO4-+99mTc-MIBI imaging.Conclusion:Ultrasound scoring method+99mTcO4-+99mTc-MIBI imaging can offer comprehensive diagnosis of thyroid nodules from their structure and function to avoid missed diagnosis.

Relationship between apolipoprotein E polymorphism and cognitive function in patients with primary hypertension / 生物医学工程学杂志

To explore the relationship between apolipoprotein E polymorphism and cognitive function in primary hypertension patients, we collected 200 Chinese primary hypertensive patients. Blood pressure (BP), heart rate (HR), height, body weight, waistline, hip circumference were measured. The Mini Mental State Examination (MMSE) was applied to test the cognitive function and compute score. Full-automatic bio-chemistry analyzer was used to determine total cholesterol (TC) and triglyeride (TG) and fasting glucose. The polymerase chain reaction-restriction fragment length polymorphism (PCR-RELP) was used for the analysis of the apolipoprotein E polymorphism. We found that in primary hypertension patients, the genotype frequency of epsilon3/4 and epsilon4/4 were significantly higher in the cognitive impairment group than that in the cognitive normal group. The allele frequency of e4 is obviously higher in the cognitive impairment group than that in the cognitive normal group. Age and epsilon4/4 genetype were positively correlated with hypertensive-cognitive impairment, while cultural level was negtively correlated with it. ApoEepsilon4 allele and age might be risk factors for the cognitive impairment in hypertensive patients. The epsilon4 homozygote (epsilon4/4) might be an important influencing factor for the progression of cognitive impairment.

Intermedin (IMD) gene expression in hypertrophic cardiac myocyte of renal vascular hypertension rats and the intervention of Valsartan, Amlodipine and Enalapril in the expression / 生物医学工程学杂志

This experiment on rats was aimed to investigate the expression of intermedin (IMD) in hypertrophic cardiac myoctye of renal vascular hypertension induced by incomplete ligation of the left renal artery, and so to detect and compare the changes of the expression after administration of Valsartan, Amlodipine and Enalapril respectively. The criterion for standard modeling was systolic pressure > or = 140 mmHg. At 4 weeks after successful modeling, 60 SD male rats were randomly divided into 5 groups, namely the hypertrophy group, the 3 drug-treatment groups, and the sham-operation group as control. Blood pressure, left ventricular mass index (LVMI), and the left ventricular mean transverse diameter of myocardial cell (LVTDM) were investigated at the 10th week after model establishment. Gene expression of IMD mRNA was detected by reverse transcription-polymerase chain reaction (RT-PCR), and the optical density of the band was measured by use of the Gel Documentation System. The ratio of IMD mRNA to beta-actin mRNA was considered the relative amount of IMD. When compared with control, the blood pressure increased significantly in the hypertrophy group. There was no statistically significant difference between the treatment groups. No significant difference in heart rate was noted at 4 weeks after operation in all groups. LVMI and LVTDM levels were significantly higher in the hypertrophy group than in the other groups; LVMI and LVTDM levels showed no significant difference among the treatment groups but they were obviously higher than those of the Sham-operation group. The gene expression of IMD mRNA in the hypertrophy group was upregulated in the myocardium, when compared with that in the other groups. Meanwhile, although IMD mRNA in the treament groups was higher than that in the Sham-operation group, no statistically significant difference of myocardial IMD mRNA was found between the treament groups. These results suggested that, in this experiment, intracardiac IMD mRNA was upregulated and could participate in the regulation of cardiac remodeling in renal vascular hypertension-induced cardiac hypertrophy. This upregulation could improve the pathologic and physiologic process of cardiac hypertrophy, and could associate with the pressure loading or myocardia hypertrophy. However, the change did not display any difference that could be attributed to the variety of hypotensive drugs.