Biomimetics ; Blood Cells ; metabolism ; CD55 Antigens ; blood ; CD59 Antigens ; blood ; Cell Membrane ; Humans ; Male ; Submarine Medicine

Objective To evaluate the relationship between intraplaque hemorrhage of cerebral arteries and acute cerebral infarcts. Methods 35 patients with severe stenosis in M1 segment of middle cerebral arteries (MCA)were included in this study.Intracranial TOF MRA (time of flight MR angiography)was performed to detect the stenosis in MCA,and DWI (diffusion weighted imaging) was performed to detect cerebral acute infarcts.T1 MPRAGE sequence was positioned on the stenosis in M1 segment of MCA,and intraplaque hemorrhage was determined according to high signal on T1 MRRAGE images.35 patients were divided into two groups:one group with intraplaque hemorrhage and the other group without intraplaque hemorrhage.Whether there was significant differ-ence in the incidences of acute cerebral infarcts between the two groups were determined byχ2 test.Results Intraplaque hemorrhage was detected in 1 5 patients,in which 12 patients had acute cerebral infarcts.There were no intraplaque hemorrhage in 20 patients,in which 9 patients had acute cerebral infarcts.There was significant difference in the incidences of acute cerebral infarcts between the two groups (P =0.046 <0.05).Conclusion There is a higher incidence of acute cerebral infarcts in patients with intraplaque hem-orrhage than those without intraplaque hemorrhage.Intraplaque hemorrhage in severe stenosis of cerebral arteries is a high-risk indi-cation for acute cerebral infarction.

Objective To analyze the clinical characteristics of Mycoplasma pneumoniae pneumonia in children under 2 years old. Methods The clinical features and treatment outcomes were analyzed in 57 children under 2 years old and compared with 153 children more than 2 years old. Results Compared with children more than 2 years old, in children under 2 years old, the number of cases with fever was fewer, the fever peak was lower and the lasting time was shorter. However, in children under 2 years old, the severe pulmonary signs were more common, the incidence of wheeze was higher, meanwhile, the count of white blood cells (WBCs) was signiifcantly increased, more small pieces of lfuff shadow was showed on chest X-ray, and the pulmo-nary complications were fewer, less corticosteroid was needed for treatment. After one-week therapy, the chest X-ray shadows were disappeared in most of children. Complications out of lungs, such as rash, liver function damage and cardiac damage can be found in both groups and no signiifcant difference (P>0.05). Conclusions Mycoplasma pneumoniae pneumonia in children under 2 years old had the characteristics of mild symptoms, severe pulmonary signs, few pulmonary complications, light systemic inlfammations and mild radiological changes.

Objective To investigate the related factors of clinical incidence and the ultrasound diagnostic value of endometrial polyps (EMP).Methods A total of 278 patients with clinical abnormal vaginal bleeding,menorrhagia,infertility,cervical polyps or physical examination showing EMP received vaginal ultrasound and hysteroscopy.The related clinical factors were recorded and single factors and multivariate unconditional Logistic regression analysis were carried.Results The univariate analysis showed that the number of pregnancy,menopause,placing intrauterine device,oral comtraceptives,history of hormone therapy,chronic endometritis,cervical polyp,merger endometriosis and obesity were the statistically significant factors of EMP incidence (P ＜ 0.05 or ＜ 0.01),which were used as dependent variables for multivariate Logistic regression analysis,indicating that menopause,chronic endometritis,history of hormone therapy and cervical polyp significantly affecting EMP incidence (P ＜ 0.05),with OR values of 4.068,4.122,3.770 and 3.983 respectively.Conclusion Menopause,chronic endometritis,history of hormone therapy,cervical polyps are the related risk factors of EMP.

Aim To investigate the effects of cell pro-liferation and activation in HSC-T6 cells by inhibiting the expression of EZH2 , and its partial relevant mech-anism. Methods By introducing the inhibitor DZNep in activated HSC-T6 cells stimulated by TGF-β1 , the protein expression levels of EZH2, p-ERK, p-AKT andα-SMA were detected by Western blot. The siRNA targeting EZH2 was designed and synthesized according to its nucleotide sequence, and their corresponding ex-pression vectors were constructed and transfected into HSC-T6 cells with LipofectamineTM 2000. The prolifer-ation of HSC-T6 cells was determined by MTT. And the protein expression levels of EZH2, p-ERK, p-AKT and α-SMA were measured by Western blot. Results By introducing the inhibitor DZNep in activated HSC-T6 cells stimulated by TGF-β1 , it effectively de-creased the protein levels of EZH2 and also the protein levels of p-ERK, p-AKT and α-SMA. By introducing EZH2-siRNA in activated HSC-T6 cells, it effectively inhibited the cell proliferation, and also the protein levels of EZH2, p-ERK, p-AKT andα-SMA. Conclu-sion Silencing EZH2 expression inhibits HSC-T6 cell proliferation and activation, and EZH2 may be a poten-tial therapeutic target gene for hepatic fibrosis.

Objective To explore the expressions of lectin-like oxidized low-density lipoprotein receptor-1(LOX-1)and apoptosis related genes caspase-3,Bax and bcl-2 in placenta,and their associations with the pathogenesis of preeclampsia.Methods Thirty preeclampsia patients(preeclampsia group),hospitalized in Department of Obstetrics,Shengiing Hospital of China Medical University from June 2005 to December 2006,were selected as the subject group,and 40 normal pregnant women as control group.The expressions of LOX-1 and apoptosis related genes caspase-3.Bax and bel-2 in different gestational weeks'placenta tissues were examined using immunohistochemistry.RT-PCR and western-blot.Results (1)Immunohistochemical detection in preeclampsia group:at 20 w+1-24 w,24 w+1-28 w,28 w+1-32 w.32w+1-36 w+1-36 w+1-40 w,respectively,the results of LOX-1 were 20.1±1.8,25.6±1.3,32.8±1.6,34.3 ±1.5,39.9±1.2;in the control group they respectively were 11.2±0.6,18.5±1.6,26.1±1.8,28.3 4-1.6,32.3±1.6;the difierence was significant(P<0.05).In preeclampsia group,the results of easpase-3 were 12.3±0.9,16.3±0.9,24.4 4-0.8,28.3±0.5,36.3±1.1.and in the control group they respectively were 8.5±1.0,12.3±1.1,17.4±1.2,20.4±stronger than those in normal pregnant women at different gestational weeks(P<0.05).However,the expression tendency of bcl-2 mRNA and proten was converse to the expression tendency of Bax.Conclusion The expressions of LOX-1,caspase-3,and Bax are upregulated in placentas of preeclampsia patients,while bcl-2 iS downregulated,both of which are associated with the pathogenesis of preeclampsia.

Objective To investigate the effects of remffentanil pretreatment on myocardial ischemiareperfusion (I/R) injury in rabbits. Methods Thirty healthy rabbits, aged 12-18 months, weighing 2.5-3.5 kg,were randomly divided into 3 groups (n = 10 each): I/R group, low-dose remifentanil pretreatment group (group R1 ) and high-dose remifentanil pretreatment group (group R2 ). Myocardial I/R was induced by ligation of anterior descending branch of left coronary artery for 30 min followed by 6 h of reperfusion in the 3 groups. Remifentanil was infused intavenously at 1.65 and 3.30 μg· kg - 1 · min- 1 for 30 min before ischemia in group R1 and R2 respectively, while equal volume of normal saline was infused instead in group I/R. Blood samples were taken for determination of serum cardiac troponin-Ⅰ (cTnI) and creatine kinase-MB isoenzyme (CK-MB) concentrations before administration (baseline), after administration, at 30 min of ischemia and at 6 h of reperfusion. The rabbits were then sacrificed and hearts removed. Myocardial tissues were obtained for microscopic examination. Results Serum cTnI and CK-MB concentrations were significantly lower in group R1 and R2 than in group I/R and serum cTnI concentration lower in group R2 than in group R1 ( P ＜ 0.01). Remifentanil infusion significantly attenuated the pathologic changes in a dose-dependent manner. Conclusion Remifentanil pretreatment provides protective effect against myocardial I/R injury in rabbits and it is related to the dose.

AIM: To explore the influence of different concentration midazolam on the macroscopic voltage gated potassium currents and to discuss the relationship between potassium currents and inhibitory effect of clinical relevant concentration midazolam on sympathetic nervous system. METHODS: Superior sympathetic ganglion neurons were dissociated enzymatically from 7 to10 day old rat. Experiments were performed about 5 h after plating at room temperature (20- 24 ℃ ). Appropriate solution was chosen to separate the K + current from the other transmembrane currents. 1 ?mol?L -1 TTX was applied to the extracelluar solution to block the Na + current. Midazolam was also resolved in extracelluar solution to get various concentration ( 0.1 , 0.3 ,3,10,50,100 ?mol?L -1 ). Currents were recorded with the patch clamp technique in whole cell configuration using glass electrodes with a tip resistance of 2- 4 M . Potassium currents were evoked by test pulse from -100 mV to +30 mV with holding potential -80mV. Data were analyzed using Clampfit 6.0 and Oringih 5.0 software. Whole cell current records were corrected for leakage and capacitance by using the P/5 protocol. RESULTS: Midazolam dose dependently inhibited the whole cell potassium currents. Clinical relevant concentration midazolam ( 0.3 ?mol?L -1 ) only reduced the peak currents by 3.89 %(P= 0.88 ). The concentration required to produce 50% current inhibition(IC 50 ) was 76.065 ?mol?L -1 . CONCLUSION: Midazolam inhibits the whole cell potassium current significantly and dose dependently, but clinical relevant concentration midazolam has minor effect on the potassium currents, indicating that the inhibitory effect of midazolam on potassium current is not related to the suppression of activity of sympathetic system.

Objective To discuss the relationship between pulmonary infection, offline difficulties and airway abnormalities and to discuss the type of airway abnormalities. Methods The clinical data of 43 patients of severe pneumonia with inspection of electronic fibro-bronchoscope in PICU from Feb 2008 to May 2010 were retrospectively analyzed. Results In the 43 cases,24 cases existel different degrees of airway abnormalities, most of airway cartilage softening,in 15 cases; laryngeal dysplasia in 3 cases; absence of the right bronchus and right lung in 1 case. Conclusion Many children may exist airway abnormalities,if they have such performance as the clinical manifestations of recurrent wheezing after birth, refractory respiratory infection or difficulties in clinical offline, the increase of PCO2 though the effective suction, paroxysmal cyanosis and excluded with heart disease. Those children should undergo inspection with electronic fibro-bronchoscope to confirm the diagnosis as early as possible.

Professor TANG Wei-yong's treatment for children acute tonsillitisis from the three aspects oftreating symptoms, treating muscle and reconciliation, namely three-solution method. In addition, he modified three ancient prescriptions to create three-solution prescription. He applied the prescription into clinical practice and obtained a lot of good efficacy.