Objectives To investigate the associations of serum superoxide dismutase ( SOD) , malondialdehyde (MDA), and uric acid (UA) with blood pressure and the prevalence of hypertension in a Chinese population. Methods We measured serum superoxide dismutase (SOD), malondialdehyde (MDA) and uric acid (UA) in 506 randomly selected participants. For database management and statistical analysis, we used the SAS 9.13 Software. Results Compared with normotensive participants, hypertensive patients had significantly lower serum levels of superoxide dismutase activity ( =0.0002), and higher serum levels of malondialdehyde and uric acid ( <0.05) .Univariate analysis indicated that serum superoxide dismutase activity was negatively associated with blood pressure, and serum levels of uric acid (P 0.0001);while serum levels of malondialdehyde was positively associated with blood pressure, and serum levels of uric acid (P 0.05) . There was significant difference in systolic (Ptrend=0.02) and diastolic blood pressure (Ptrend=0.04) between three groups defined by tertiles of serum levels of superoxide dismutase, with a lower blood pressure in the highest tertile than in the lowest tertile. Furthermore, the systolic (Ptrend=0.01) and diastolic blood pressure (Ptrend=0.003) in the highest tertile, which defied by the serum levels of malondialdehyde, were significantly higher than those in the lowest tertile. Conclusions Hypertensive patients have a disturbed oxidative and anti-oxidative balance. Oxidative stress may play a role in the pathogenesis of hypertension in Chinese.

Objective To observe the effect Azithromycin injection in the treatment of mycoplasma pneumoniae pneumonia ( MPP) in children. Methods Forty-four children of mycoplasma pneumoniae pneumonia were randomly divided into two groups, the Azithromycin group ( treat by Azithromycin, made by Pfizer) and the control group (treat by domestic Azithromycin) respectively. Improvement in symptoms and signs between the two groups were observed and compared. Results There were 25 cases in the Azithromycin group, of which,after a week, 17 cases cured,2 cases got better significantly and 6 cases got better. The effective ratio was 76. 00% ( 19/25 ). There were 19 cases in the control group, of which 5 cases cured, 9 cases got better significantly ,4 cases got better and 1 case no change. The effective ratio was 73. 68% (14/19). There was no statistical significance in the effective ratio between the two groups ( x2 = 0. 03, P > 0. 05). However, the Azithromycin group was superior to the control group both in the one week cure rate (t = 7.50,P< 0.05) and on defervescence time (t = 34. 05, P < 0. 05 ) and rales disappearance (t = 2. 39, P < 0. 05 ). Conclusion Azithromycin injection is more effective than domestic Azithromycin in the treatment of mycoplasma pneumoniae pneumonia,especially in the aspect of improving symptoms.

OBJECTIVEThis study aims to identify the crack tip stress intensity factor of the propagation process, crack propagation path, and the changes in the shape of the crack tip by the finite element method.

METHODSThe finite element model of dentino-enamel junction was established with ANSYS software, and the length of the initial crack in the single edge was set to 0.1 mm. The lower end of the sample was fixed. The tensile load of 1 MPa with frequency of 5 Hz was applied to the upper end. The stress intensity factor, deflection angle, and changes in the shape of the crack tip in the crack propagation were calculated by ANSYS.

RESULTSThe stress intensity factor suddenly and continuously decreased in dentino-enamel junction as the crack extended. A large skewed angle appeared, and the stress on crack tip was reduced.

CONCLUSIONThe dentino-enamel junction on human teeth may resist crack propagation through stress reduction.

Objective To study the optimized process for effective components in Danggui-Buxue pill by orthogona design,and provide the basis for the establishment of quality standard.Methods Ferulie acid and ligustilide were used as examining index,the extraction time,solvent volume and extraction times were used as factors.L9(34) orthogonal test table was used to determine the optimum extraction process.HPLC method was used to establish methodology for ferulie acid and ligustilide.Results According to the result of orthogonal design,comprehensive consider determining the extraction efficiency of ferulic acid and ligustilide the optimal extraction technology as follows:1.0 g Danggui-Buxue pill was extracted by 30 ml of methanol for 60 min,extraction times for 2 times.Conclusions This method is simple with high efficiency.Its HPLC method has high precision and good reproducibility,which can be used for analysis Danggui-Buxue pill.

Based on the AuNPs/Nafion composite membrane technology and immobilization of amino adenosine aptamer using carboxyl carbon nanotubes on the surface of a glassy carbon electrode, a electrochemiluminescence sensor was preparated.The sensor was characterized by cyclic voltammetry and electrochemical luminescence.The result showed that the sensor had a good stability and reproducibility.Adenosine and adenosine aptamer could form G-tetrahedral structure, leading a decrease of ECL intensity.Under the optimum experimental conditions, the relative ECL intensity showed a good linear relationship to the negative logarithm of adenosine concentration in the range of 1.0×10-11-1.0×10-7 mol/L, the linear equations was ΔIECL=-890lgC-5050 with a detection limit of 5.0×10-12 mol/L.The RSD was 2.7% in 11 times measurement of adenosine (1.0×10-10 mol/L).The recovery was 97.1%-110.0% in the determination of real adenosine sample.

Objective To analyze the causes of death for 89 HIV/AIDS patients,and the association of CD4+ T lymphocyte counts with the mortality.Methods Data were collected from 89 deceasedpatients who were admitted to Shanghai Public Health Clinical Center from Jan 1996 to Sep 2007,and wereretrospectively analyzed with t-test.Results Heterosexual,blood transfusion and blood products were themajor transmission routs for 89 deceased HIV/AIDS patients.The primary causes of death varied with different levels of CD4+ T lymphocyte counts.With higher CD4+T lymphocyte counts,patients were more likelyto die from non-AIDS-related opportunistic infections such as upper digestive tract hemorrhage.Serious pulmonary infection induced by various etiologies was the primary cause of death.Co-infections of multiple etiologics were often seen in these death cases.Conclusion Opportunistic infection is the primary cause of death for HIV/AIDS patients.Appropriate therapies should be based on CD4+ T lymphocyte counts and patients' specific conditions to reduce the mortality.

Objective To investigate the understanding level of asthma related knowledge and the treatment compliance in parents of children with asthma in Tianjin. Methods Questionnaire survey was given to 93 randomly selected parents of children with asthma at our asthmatic clinic ,whose children began to receive regularly asthmatic administration for at least 6 months from June to July in 2009. Results 72.04% of the parents included into the survey knew that asthma was a chronic airway inflammatory disease; 100% of them adhered to use prescription inhaled corticosteroid (55.91%) or inhaled corticosteroid combined with an inhaled long-acting β2-agonist (44. 09% ) ;74. 68% of them believed that if the child is in a well control state, he/she could participate in exercise as healthy children. There were 93.55% and 97.85% children patients aged ＞ 5 had never used PEF meter or CACT respectively to monitor the ill conditions. 25.81% of the parents chose rapid-acting β2-agonist to deal with asthma at acute attack stage, while 19.35% chose to add antibiotics and 11.83% were unable to do anything. 43.01% of the parents worried that the long-term use of inhaled corticosteroid would have side effects on the growth and development of their children, although they chose to obey to the doctor's prescription. Conclusions The general understanding of asthma is good in the parents, whose children had received asthmatic administration regularly in Tianjin area,but there are still some weak links exist. The related education may help asthmatic children's parents to master the knowledge of asthma, give them correct recognition of the treatment and prevention of asthma,increase the treatment compliance. This work should be insisted continuously.

[Summary] Eighteen patients with idiopathic hypogonadotropic hypogonadism( IHH) receiving aromatase-inhibitor( AI) letrozole for at least 3 months were recruited.After 3 months′treatment, LH levels were increased from (2.1 ±1.5) IU/L to (3.6 ±3.7) IU/L(P=0.029), and FSH levels from (2.6 ±1.8) IU/L to (4.3 ±3.4) IU/L (P=0.003).Total testosterol was increased from (87 ±42) ng/dl to (166 ±200) ng/dl(P=0.082), and estradiol wasdecreasedfrom(22.7±18.7) pg/ml to (13.4±10.6) pg/ml(P=0.020).The average testis volume was increased[(14.3 ±3.9 vs 11.2 ±4.9) ml, P<0.01].Sperms were detected in 8 out of 9 patients who did seminal fluid test.The result of general linear model showed that LH(60 min) was significantly related with total testosterol increment( P=0.045) .

[Summary] Cytochrome P450 oxidoreductase deficiency ( PORD) is a rare disease, which is a subtype of congenital adrenal hyperplasia. The predominant signs include no puberty development, infantile reproductive organs, ear deformities, and bone synostosis in skull or limbs. Here, we analyzed the clinical features of a case with PORD confirmed by gene sequencing. The pathology, genetic features, clinical manifestations, diagnosis and treatment for PORD were reviewed.

Objective To investigate the influence of hedysaryum polysaccharide (HPS)in the kidney function and expressions of Glut-1 mRNA and protein in kidney tissue of db/db mice with diabetic nephropathy (DN)and to elucidate its possible action mechanism.Methods 10 db/m mice were taken as normal control group(n=10);50 fueling animal model db/db mice with DN were randomly divided into model group,enalapril group and the low, middle and high doses of HPS groups(n=10).The mice in noral control group and model group were given physioloical saline by gavege;and the mice in the other groups were respectively given 10 mg·kg-1 ·d-1 enalapril, 100,200 and 400 mg·kg-1 ·d-1 HPS by gavage;lasted 8 weeks.Picric acid method was used to determine the serum creatinine(SCr)level of the mice,enzyme coupling rate method was used to determine the blood urea nitrogen (BUN)level,ELISA method was used to determine the urinary microalbumin(UMALB)level,RT-PCR method was performed to detect the expression of Glut-1 mRNA, and Western blotting and immunohistochemical methods were used to detect the expression of Glut-1 protein.Results Compared with model group,the levels of SCr, BUN, UMALB, the mRNA and protein of Glut-1 expressions were decreased, especially in 400 mg·kg-1 ·d-1 HPS and enalapril groups(P<0.01).The HE and Masson staining results showed that less inflammatory cells infiltration in glomerular of the mice were found, capillary lumens were unobstructed, and the collagen deposition was not obvious in 400 mg·kg-1 ·d-1 group.Conclusion HPS could improve the kidney function of the db/db mice and inhibit the Glut-1 mRNA and protein expressions obviously, which indicates that HPS could delay the development of DN by inhibiting the Glut-1 expression in the glomerular mesangial cell membrane.