2007(6):349-353. DOI: 10.7655 CSTR:
Abstract:Objective: This article provides an overview of characteristics of phospholipids, the characteristics and influential factors of liposome and microemulsion as carriers for skin delivery of drugs, and the latest advances of the phospholipids carriers in transdermal delivery systems. The perspective is that phospholipids carriers may be capable of a wide range of applications in the transdermal delivery system.
Yulong Hu , Ting Li , Yong mei Wang , Lin Guo , Xiaohong Shan , Jing Li , Qi Chen , Yuehua Li
2007(6):354-358. DOI: 10.7655 CSTR:
Abstract:Objective: To test whether IL-1 RI/My088-TIR mimic AS-1 can work as a new compound that targeted at blocking MyD88-dependent signaling pathway, we investigated the physical structure and biological function of AS-1. Methods:The crystallographic structure of AS-1 was examined by 1H nuclear magnetic resonance. The toxicity of AS-1 was measured with Methyl thiazolyl tetrazolium(MTT) assay. The effect of AS-1 on phosphorylation state of p38 MAPK and IRAK-1 was observed with Western blot. Results:The crystallographic details of AS-1 demonstrated that it was a tri-peptide sequence[(F/Y)-(V/L/I)-(P/G)] of the IL-1RⅠ-TIR domain BB-loop. No toxicity of AS-1 was shown to HEK 293A cells. The phosphorylation of p38 MAPK, induced by IL-1β significantly increased from those in the control group. AS-1 significantly reduced the phosphorylation of p38 MAPK induced by IL-1β. IL-1β increased the phosphorylation of IRAK-1 significantly, which was prevented by AS-1. Conclusion:AS-1 is a competitive mimic between IL-1RⅠ-TIR and MyD88-TIR domain, which most likely interferes with MyD88-dependent signaling pathway.
Donghua Yin , Meng Liu , Guoping Yang , Jun Huang , Ming Gui
2007(6):359-362. DOI: 10.7655 CSTR:
Abstract:Objective: To investigate the mechanisms that Simvastatin, a 3-hydroxy-3-methylglutaryl coenzyme A(HMG-CoA) reductase inhibitor, plays an important role in primary prevention of atherosclerosis independently of its lipid-lowering effect in Apolipoprotein E-deficient mice in the early stage of atherosclerosis. Methods: Twenty-four 6-week old male apoE-deficient mice were randomly divided into two groups:control group(normal saline) and treatment group[simvastatin(5 mg/(kg·d))]. Simvastatin was administered to treatment group mice by gavage and the same volume of normal saline was administered to control group mice by the same method for 2 or 4 weeks.Total cholesterol(TC), super-oxide dismutase(SOD), malondialdehyde(MDA) and serum nitric oxide(NO) were measured by bio-chemical analysis. Results: There was no significant difference in serum TC between control and treatment groups. Compared with the control’s, the effects of simvastatin were more significant in decreasing serum MDA level(P < 0.01 vs control’s at 2-week; P < 0.006 vs control’s at 4-week), increasing serum SOD level(P < 0.03 vs control’s at 2-week; P < 0.003 vs control’s at 4-week) and NO level(P < 0.01 control’s at 2-week; P < 0.001 vs control’s at 4-week) either at 2 or 4 weeks. Conclusion: Simvastatin attenuates oxidative stress and protects endothelial function by the mechanisms of decreasing serum MDA level, increasing serum SOD level and NO level , which were inconsistent with its cholesterol-lowering effect. It may play an important role in primary(if not all) prevention of atherosclerosis and might be independent of lipid-regulation mechanism.
Chunping Tang , Yanrong Liu , Qin Shen , Zhijian Yang , Jun Huang , Ming Gui
2007(6):363-366. DOI: 10.7655 CSTR:
Abstract:Objective: This investigation was designed to stratify patients with acute chest pain based on their symptoms, electrocardiogram (ECG), cardiac injury markers and the number of accompanying traditional risk factors(smoking, obesity, hyperlipemia, hypertension, diabetes), and to assess the effect of the above factors to obtain a risk stratification for patients with chest pain. Methods: We identified 139 patients with acute chest pain, including 45 myocardiac infarction patients, 65 unstable angina patients and 29 chest pain patients without identified acute coronary syndrome(ACS) admitted to our Coronary Heart Center during December 2004 to February 2005. All patients accepted coronary angiography. All data was collected using questionnaires. Based on reported symptom, electrocardiogram (ECG), cardiac injury markers and the number of the accompanying traditional risk factors, we stratified all patients into four groups: Group 1, patients with acute chest pain, ECG changes and abnormal cardiac injury biomarkers. Group 2, patients with acute chest pain and ECG changes(without abnormal cardiac injury biomarkers). Group 3, patients with acute chest pain, normal ECG, normal cardiac injury biomarkers and >2 traditional risk factors. Group 4, patients with acute chest pain, normal ECG and normal cardiac injury biomarkers, but only≤2 traditional risk factors. From this data we examined the difference of ACS incidence in the four groups. Results:After stratification the ACS incidence of the grouped patients in turn was 100%, 84%, 69.6% and 53.3%. The combination of early phase ECG and cardiac injury markers identified 70.9% patients with ACS(the specificity being 90.7%). The mortality of group 3 was higher compared with group 4(69.6% vs 53.3%), however the P value was more than 0.05 and didn’t show significant statistical difference. The correlation analysis found the number of the traditional risk factors had a significant positive correlation (r = 0.202, P = 0.044) with the number of stenosis being more than 50% of the artery diameter. Multiple linear regression showed the hypertension had a significant correlation with the number of the diseased regions(P = 0.014). Conclusions:The risk stratification based on the symptom, ECG, cardiac injury markers and accompanying traditional risk factors is both important and available in practice. It is unsuitable for patients with a normal ECG and cardiac injury markers to differentiate ACS from non-cardiac chest pain relying only on the number of the accompanying traditional risk factors. However we found the number of the risk factors can indicate the disease severity.
Yangyang Zhang , Wen Ge , Biao Yuan , Xiaohu Zhang , Kejiang Cao
2007(6):367-371. DOI: 10.7655 CSTR:
Abstract:Objective: To investigate the histomorphological change in auto-extremity artery following transplantation. Methods: 50 New Zealand rabbits were randomly divided into 5 groups(postoperative 1 d, 3 d, 7 d, 14 d, 56 d, n = 10). Femoral artery was harvested and end-to-side anastomosed with carotid in order to build the auto-extremity arterial graft animal model. On the postoperative 1st, 3rd, 7th,14th and 56th days, grafts for morphometric analysis under the Image analysis system were obtained; and electron microscope was scanned to observe endothelial cells. In addition, Immunostaining of sections were performed with the mouse monoclonal antibody of the α-smooth muscle isoform of actin and proliferating cell nuclear antigen antibody. Results: Overall patency rate for all conduits was 86%.The intimal hyperplasia was first observed in the 7th day group, and continued to increase in the 56th day group(183.21±111.74)μm, P < 0.01. Additionally, the luminal narrowed(32.43±18.28)% in the 56th day group. Smooth muscle cells were the mainly hyperplastic components. The most active proliferation of cells was detected in the 14th day group, where the extracellular matrix gradually deposited in the intima. Conclusion: Moderate intimal hyperplasia occurred in arterial conduits and vascular structure experienced constrictive remodeling after auto-transplantation.
Mei Pan , Qinjun Wei , Fang Cao , Yajie Lu , Yibao Zhu , Yongqian Shu , Xin Cao
2007(6):372-376. DOI: 10.7655 CSTR:
Abstract:Objective: To study the inhibition of proliferation of breast cancer by small interfering RNA(siRNA) targeting human prolactin(hPRLR) and the underlying mechanisms. Methods:The siRNA targeting hPRLR was chemically synthesized and transfected into MCF-7 cells, the expression of hPRLR was analyzed by real-time quantitive PCR, cell growth inhibition was measured with MTT assay, cell cycle of the transfected cells was examined by flow cytometry, meanwhile, expression of cyclin D1 was tested by semi-quantitative RT-PCR. Results:24 h after transfection with 100 nmol/L siRNA-PRLR, the expression of hPRLR mRNA was suppressed by 65%, cells in G1 phase increased, but cells in S phase decreased. Down regulated hPRLR expression exhibited significant inhibition in cell proliferation. And the expression of cyclin D1 was down regulated. Conclusion:The results indicate that siRNA-hPRLR is a useful tool for silencing hPRLR expression and inhibiting cell proliferation in breast cancer MCF-7 cell line, and it may be a possible new approach for breast cancer gene therapy.
Weiping Lu , Xiaoyun Wang , Xiufen Zhao
2007(6):377-381. DOI: 10.7655 CSTR:
Abstract:Objective: To evaluate the effects of different concentrations of phosphate on calcium deposition and osteocalcin level in cultured bovine aortic smooth muscle cell, investigate the mechanism of hyperphosphatemia to evoke calcification of vascular smooth muscle cell and observe the effects of phosphonoformic acid(PFA) in different concentrations on vascular calcification. Methods: The bovine aortic smooth muscle cells (BASMC) were cultured.Calcium deposition and the expression of osteocalcin of BASMC in different concentrations of phosphate (1.5 mmol/L and 2.0 mmol/L) and PFA were determined by o-cresolphthalein complexone and radioimmunity methods, respectively. Osteocalcin mRNA expressions were determined by RT-PCR. Results: After six or nine days of BASMC cultured, the calcium deposition in Pi 2.0 mmol/L group was more than that in Pi 1.5 mmol/L group[(77.187±11.692)μg/(mg·protein) vs(25.768±1.750)μg/(mg·protein), P < 0.01 and(125.399±16.677)μg/(mg·protein) vs(29.046±2.635)μg/(mg·protein), P < 0.01 respectively]. The calcium deposition was dependent on time and dosage of phosphate treatment. After 72 h culture the osteocalcin in Pi 2.0 mmol/L group was more than that in Pi 1.5 mmol/L group[in supernatant,(1.503±10-2±2.601×10-3)ng/(μg· protein) vs(2.981×10-3±8.382×10-4)ng/(μg·protein), P < 0.001], the same was found in osteocalcin mRNA expression[OC/GAPDH,(1.906±0.132) vs(0.748±0.037),P < 0.001]. Compared to Pi 1.5mmol/L group,bovine smooth muscle cells(BSMC) cultured in media containing Pi 2.0 mmol/L phosphate levels increased calcium deposition[On day 6,(77.187±11.692)μg/(mg·protein) vs(25.768±1.750)μg/(mg·protein), P < 0.001]. Elevated phosphate treatment of BSMCs also enhanced the expression of the osteoblastic differentiation marker osteocalcin[On day 3, Pi 2.0 mmol/L group vs Pi 1.5mmol/L group,(1.503×10-2±2.601×10-3)ng/(μg·protein) vs(2.981×10-3±8.382×10-4)ng/(μg·protein), P < 0.001]. PFA decreased ciacium deposition and osteocalcin expres-sion statistically[Pi 2.0 mmol/L+PFA1.0 mmol/L group vs Pi 2.0mmol/L group , ciacium deposition, (37.729±5.899)μg/(mg· protein) vs (77.187±11.692)μg/(mg·protein), P < 0.001]; Osteocalcin in supernatant, (4.529±10-3±1.250×10-3)ng/(μg·protein) vs(1.503×10-2±2.601×10-3) ng/(μg·protein), P < 0.001; osteocalcin mRNA expression, OC/GAPDH, (0.642±0.092) vs (1.89±0.165), P < 0.01]. Conclusion: Hyperphosphate may directly promote calcium deposition and the osteocalcin expression of BASMCs. It may be a new explanation for the phenomenon of vascular calcification in hyperphosphatemic conditions. Hyperphosphatemia is an independent factor to stimulate vascular calcification. PFA can inhibit calcium deposition and osteocalcin expression induced by elevated phosphate.PFA may be a new medicine to treat vascular calcification induced by elevated phosphate.
2007(6):382-385. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate correlation between C-reactive protein(CRP) and gestational diabetes mellitus(GDM). Methods:Twenty-five GDM women were served as study group, and thirty normal pregnant women were selected as control group. The serum FPG,2hPG, HbA1c and CRP levels and the leukocyte count were detected in the two groups, in order to observe the relationship between gestational diabetes mellitus and inflammatory markers. Results:The age and gestational week did not show difference in the two groups(P > 0.05). But there was a significant difference in body mass index(BMI) between the GDM group and the control group(P < 0.05). The serum FPG, 2hPG, HbA1c and CRP levels and the leukocyte count in the GDM group were higher than those in the control group, and the difference was significant(P < 0.05). There was positive correlation between serum C-reactive protein value and FPG, 2hPG, HbA1c serum levels or the leukocyte count in GDM group. But in the control group there was no correlation between them. Conclusion:The results suggest that there is correlation between C-reactive protein and gestational diabetes mellitus, and inflamma-tion may play an important role in the development of gestational diabetes mellitus.
Jingming Zhu , Ningning Hui , Xiuhong Jiang , Huaxing Zhang , Chengzhang Fu
2007(6):386-389. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function, atrio-ventricular node function and hemodynamics. Methods:Thirty-two Angora’s rabbits were selected and randomly divided into four groups. U1 group:urapidil 0.25 mg/kg; U2 group:urapidil 0.5 mg/kg; N1 group:nicardipine 10 μg/kg; N2 group: nicardipine 20 μg/kg. All these medicine were administrated within 30 seconds. Measurements were taken before and after the administration of urapidil or nicardipine for the follow-ing data: mean blood pressure(MAP), heart rate(HR), sino-atrial conduction time(SACT), maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT) , index of sinus node recovery time(SNRTI), Wenckebach A-V conduction frequency (WB), and P-R interval. Results:Significant MAP and HR changes were identified in all of the four groups before and after adminis-tration of both urapidil and nicardipine. No significant changes could be found in the rest of the parameters. Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P < 0.01); the MAP decreased(P < 0.01) and the HR increased drastically(P < 0.01). Conclusions:Neither urapidil(0.25 mg/kg, 0.5 mg/kg) nor nicardipine(10μg/kg, 20μg/kg) has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function. Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.
Yi Xu , Dehang Wang , Lijun Tang
2007(6):390-393. DOI: 10.7655 CSTR:
Abstract:Objective:To assess the capability of magnetic resonance imaging(MRI) in evaluating the cardiac structures and function in the hypertrophic cardiomyopathy(HCM). Methods:Fourteen healthy volunteers and eighteen cases with HCM verified by history, clinical presentation, electrocardiogram and echocardiography(ECG) were performed with MRI. The myocardial thickness of interventricular septum at the basal segment and that of posterolateral free wall of the left ventricle(LV) were measured. Some indexes for evaluating cardiac function were measured using ARGUS auto-quantitative program. Results:The myocardial thickness of septum at the basal segment had significant difference between the HCM patients and the healthy volunteers. There was no significant difference between MRI and ECG in examining end-diastolic volume, ejection fraction of the LV. Conclusion:MRI can fully provide more information on the abnormalities of cardiac anatomy and function; thus, it is of great value in clinical application.
Jiajun Xu , Xin Duan , Yanchun Yang
2007(6):394-397. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the correlation between obstetrical complications and depressive disorder. Methods:Depressive disorder probands and their adult sibling were diagnosed using CCMD-3 criteria. Obstetrical data from maternal reports were scored, applying published scales that take into account number and severity of complication. Results:The scores of obstetric complication and prenatal complications and low birth weight were significantly worse in probands than siblings without depressive disorders. Conclusion:Results suggest obstetric complications are etiologically significant in depressive disorder.
Shaoqin Chen , Shengquan Zou , Qibao Dai , Peisheng Huang , Weihua Cai , Hong Li
2007(6):398-401. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas(SPTP). Methods:Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin(HE) staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results:Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin(9/9 cases), AAT(9/9 cases), NSE(9/9 cases), ACT(7/9 cases), CK20(2/9 cases), CgA(1/9 cases), S-100(3/9cases), PR(4/9cases), Syn(3/9 cases) and CD56(5/9cases), negative in CEA and ER. Conclusion:SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.
Rong Cui , Jie Feng , Xin Zhang , Xi Zhou , Haozhe Cao , Xiaoning Yan
2007(6):402-407. DOI: 10.7655 CSTR:
Abstract:Objective: To examine the expression patterns of p63 in tissues of particular keratinocyte original hyperproliferate diseases and variety cell types for determining if P63 is the marker of proliferative potential keratinocytes. Methods: P63 protein was detected and analyzed by immunoreactivity method and Western blot in biopsy specimens of keratinocyte original disorders including squamous cell carcinomas SCC, basal cell carcinomas BCC, Bowen’s disease and other tissues or cells, such as psoriasis vulgaris, normal skin tissues, primary cultured keratinocytes, immortal HaCaT cells, and epidermoid carcinoma cells A431. Results: P63 protein was expressed in the nuclei of basal and suprabasal layer of the epidermis, germinative cells of sebaceous glands in normal epidermal. P63 was strongly and diffusely detected in the majority of tumor cells in BCC and poorly-differentiated SCC. In Bowen’s disease, p63 expresses are remarkable in all cell layers. In the psoriasis plaque epidermal, p63 expressed mainly in basal cells and part of spinous cells. P63 expressed more strongly in primary cultured keratinocytes than in A431 cells or HaCaT cells. Conclusion: P63 is a nuclei marker of undifferentiated keratinocytes with the proliferative potential and may disrupt the terminal differentiation. The overexpression of p63 reflects immaturity of the tumor cells. The immunohistochemical staining of p63 may be useful for investigating the origin and differentiation of tumor cells.
JIANG Li , ZHANG Li , PENG Tao , SUN Qiu-yan , LENG Jing
2007(6):523-526. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the expression of epidermal growth factor receptor(EGFR) and the EGFR signal transduction pathway in human hepatocellular carcinoma(HCC) cells, and to explore the molecular mechanism of EGFR pathway mediating the proliferation of HuH7 cell line. Methods:The expression of EGFR in HCC tissues were evaluated by immunohistochemistry(IHC). HuH7 cells were treated with EGF and AG1478. Western blotting was employed to detect the expressions of EGFR, p-EGFR and p-ERK in HuH7 cells, and the cell viability was determined by the cell proliferation reagent CCK-8. Results:Among 17 cases of HCC tissues,the positive rates of EGFR detected were 100%,while the expression of EGFR in HuH7 was more stonger than that in HL-7702. Exogenous EGF(10 μg/L) enhanced the phosphorylation of ERK and EGFR, and also the growth rate of HuH7 cells at 24 h. But the effect of EGF could be totally interrupted by AG1478(20 μmol/L). Conclusion:Our findings suggested that the expression of EGFR should be positive intensively in human HCC cell line HuH7, and the activation of EGFR depend upon the phosphorylation of EGFR. EGFR-ERK/MAPK signal transduction pathway might play a key role in HuH7 cells, which regulated the development and progression of human HCC cells.
SHA Yu-gen , HUANG Song-ming , ZHANG Ai-hua , ZHAO Fei , CHEN Rong-hua
2007(6):527-529533. DOI: 10.7655 CSTR:
Abstract:Objective:To construct the podocin immunofluorence expression vector and observe its effects of transfection on CD2AP distribution in HEK293 cells. Methods:The pGEMT-easy vector containing the full-length cDNA encoding the human podocin was cloned and digested with BamHI and XhoI. The digested full-length podocin was subcloned into pEGFP-C2. The constructed plasmids were transfected into HEK293 cells,and its effect on CD2AP distribution were observed by immunofluorescence. The interaction between podocin and CD2AP was detected by immunoprecipitation. Results:①The pEGFP-NPHS2 expression vector was successfully constructed and podocin exclusively located on HEK293 cell membrane.② After podocin transfection, CD2AP redistributed from perinucleus to cytoplasm in HEK293. Conclusion:Podocin can recruit CD2AP to redistribute from perinucleus to cytoplasm in HEK293 cells.
LOU Ke-xin , LIU Ning-bo , PENG Tao , LENG Jing
2007(6):530-533. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the cell growth inhibition induced by selective cyclooxygenase-2(COX-2) inhibitor celecoxib and its molecular mechanisms. Methods:Cell growth rates were assessed by WST-1 assay. Apoptosis was examined by flow cytometry. The expression of COX-2, caspase-3 and Akt phosphorylation were examined by western blot analysis. Results:Cells were treated with increasing concentrations of celecoxib(0-50μmol/L) for 24 hours,and the cell growth rate was 100%,81.15%,66.72%,54.93% and 11.41%, respectively. The apoptocic ration of 50 μmol/L group was 30.72%. The remarkable activation of caspase-3 and significant reduction of Akt(Thr308) phosphorylation could be observed by western blotting. Conclusion:The celecoxib inhibited proliferation and induced apoptosis of the vascular smooth muscle cells in a dose dependent manner, which is partly related to the mechanism of Akt/caspase pathway.
BAI Xiao-Ming , LOU Ke-Xin , LIU Ning-Bo , LENG Jing
2007(6):534-537. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the effect of selective COX-2 inhibitor celecoxib on cell cycle arrest in Hepatocellular carcinoma cells. Methods:Three different human hepatoma cell lines HUH-7, Hep3B and HepG2, were used in this experiment. The cells were treated with various degrees of celecoxib for different time. The cell viability was detected by WST-8. The cell cycle of the hepatoma cells was analyzed by flow cytometry. Results:Celecoxib induced a significant decrease in cell viability in these three hepatoma cell lines. Flow cytometry showed a cell cycle arrest in G0/G1, and a weak arrest in G2/M checkpoint, when the cells were exposed to celecoxib 25 μmol/L for 24 h. And this effect seems to be stronger in 48 h. Conclusion:Celecoxib induce G0/G1 and G2/M cell cycle arrest in human hepatocellular cells, which may play an important role in hepatoma cell growth inhibition.
MIN Xiao-yan , QIAN Bo , LIU Li , ZHANG Xiao-jin , CHENG Yun-lin
2007(6):538-541. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the time correlation with the activation of molecule targets in Toll Like Receptor 4(TLR4) signaling in mice myocardium activated by lipopolysaccharide(LPS) and its significance. Methods:Male C57BL/6J mice were randomly divided into LPS group(intraperitoneal injection with LPS 10 mg/kg) and saline control group. The expression of molecule targets in TLR4 signaling parthway were detected at 5 min,10 min,30 min,1 h,2 h,6 h,12 h,24 h(n = 3) after treatment by Western blotting. Results:The expression of TLR4-MyD88-IκBα signaling is activated 5 min after injection, reached the peak at 2 h, then decreased(P < 0.05). The expression of MAPKs is activated 5 min after injection, reached the peak at 6 h, then decreased(P < 0.05). The expression of Akt is activated 10 min after injection, reached the peak at 6 h, then decreased(P < 0.05). Conclusion: There is a close correlation between the activation of TLR4 signaling and the time of LPS treatment in mice myocardium .
ZHANG Shou-Gang , LIU Yan-Qing , GAO Rong , HE Bin , Zhao Hong-yan , DI Xu-Dong , CHENG Jie , TIAN Xuan , XIAO Hang
2007(6):542-545. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate toxicity of deoxypodophyllotoxin(DOP) against 3rd instar larvae of Pieris rapae L. and its effects on activities of AChE and ATPase, and to study its insecticidal mechanism. Methods:The toxicity of DOP was measured with leaf-dipping method. The activites of enzymes were determined with AChE and ATPase assay kit. Result:① DOP exhibited toxicity against 3rd instar larvae of P. rapae L. This toxicity is concentration-time-dependent with LC50=151.87 mg/L(at 48 h)>LC50=39.99 mg/L (at 72 h)> LC50=10.60 mg/L(at 96 h).② DOP did not affect the activity of AChE. ③ DOP profoundly inhibited the activity of ATPase at high concentration(125 mg/L). DOP at middle concentration(5,25 mg/L) showed activative effect at 24 h,then recovered at 48 h, and maintained normal(5 mg/L) or exhibited inhibitory effect(25 mg/L) at 72 h. Conclusion:DOP exhibited toxicity against 3rd instar larvae of P. rapae L. AChE is not target of deoxypodophyllotoxin and ATPases may be one important target of deoxypodophyllotoxin.
ZHU Yi-bao , PAN Mei , WEI Qin-jun , CAO Xin
2007(6):546-549. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate cytotoxicity of breast cancer cell line MCF-7 cells induced by trichostatin A and its possible transcription regulation. Methods:The proliferative activity of MCF-7 cells upon different trichostatin A concentration was accessed by MTT assay, cell apoptosis followed was identified by Annexin-V/PI double staining; cycle alteration was examined by cell cycle analysis in different time, expression status of ERα, myc-c, P21, cyclin-D and Bcl-2 genes was analyzed by RT-PCR. Results:A time and dose dependent inhibition was detected in MCF-7 cells treated with trichostain A. At 48 h treatment, Annexin-V/PI double staining analysis indicated that cell apoptosis rate increased as trichostatin A rose, at 0.5 -滋mol/L treatment, apoptosis rate was 33.82%; Cell cycle analysis showed MCF-7 cells were arrested in cycles after trichostatin A treatment, while almost no apoptosis was evidenced. RT-PCR revealed that except P21 gene,ERα,myc-c,cyclin-D and Bcl-2 were all down regulated,and all made it to proliferative inhibition, cell arrest and apoptosis. Conclusion:Trichostatin A could induce cytotoxicity in MCF-7 cells, and may correlate with transcription regulation.
CHENG Li-bo , CHEN Jie , ZHAO Mu-zi , LIU Qing-huai , LI Jian-min
2007(6):550-554. DOI: 10.7655 CSTR:
Abstract:Objective:To clone and analyze the different splicing variant of Lims gene in mouse. Methods:Splicing variants of Lims gene were amplified by RT-PCR from mouse cDNA and inserted into PinPointTM Xa-1T vector, two position clones selected by PCR were sequenced. Results:Lism E, a novel splicing variant with a 1164 bp open reading frame(ORF), encoding a 387-amino acid(AA) protein was cloned. Conclusion:Comparative genome analysis displayed Lims E, a novel variant of Lims gene was confirmed in mouse and established the foundation for further to studying the function of Lims E in cell development.
SUN Feng-rong , GONG Jie , QIAN Ling-mei , KONG Xiang-qing , SHEN Yan-hui , YANG Rong , CAO Ke-jiang
2007(6):555-557. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the protein expression of GATA-4 in the developing rat hearts. Methods:Embryolc hearts of normal rats were obtained on the 12 th, 15 th and 19 th day during embryonic period. The expression level of GATA-4 protein was accessed by Western blot and Immunohistochemistry, and the results were analyzed by the statistical method of One-way ANOVA. Results:GATA-4 was expressed in atrial ventricular myocardium,endocardium, endocardial cushion and the root of main artery, The expression of GATA-4 in the heart was increasing obviously on 15 th day in embryonic period, but it was slightly decreasing on 19 th day. Conclusion:With the development of rat hearts, the protein expression of GATA-4 was dynamic. It was suggested that GATA-4 should play a crucial role in rat heart development.
ZHENG Dong , YANG Shu-Hua , FENG Yong , TANG Xin , MEI Rong-cheng , XU Liang
2007(6):558-561572. DOI: 10.7655 CSTR:
Abstract:Objective:To construct the TGF-β3 protein with targeted therapy function in which latency associated peptide, MMP enzyme and TGF-β3 play the role of latent, targeting and therapeutic effect, respectively. In addition, the specific targeted therapeutic effect was investigated by transferring TGF-β3 gene to chondrogenic progenitor cells(CPCs) from perichondrium. Methods:The recombinant of pIRES-EGFP-MMP was constructed by combination of DNA encoding MMP enzyme cutting site and eukaryotic expression vector pIRES-EGFP. LAP and TGF-β3 fragments were obtained from rat embryos by RT-PCR and inserted into the upstream and downstream of MMP from pIRES-EGFP-MMP, respectively, so as to construct the recombinant plasmid of pIRES-EGFP-LAP-MMP-mTGF-β3, which was then transferred to chondrogenic progenitor cells. The genetically modified CPCs were cultured with medium with or without MMP-1. The expression of Collagen II, Aggrecan and TIMP were detected at day 7,14 and 21. Results:pIRES-EGFP-LAP-MMP-mTGF-β3 was successfully constructed and identified by enzyme digestion and sequencing analysis. Only the medium with MMP enzyme can promote the chondrogenesis and the matrix production of genetically modified CPCs. Conclusion:The engineering TGF-β3 could have targeted therapy for cartilage repair in future.
ZUO Yi-zhi , ZHANG Shao-xiang , LI Lin , WANG He-ming
2007(6):562-564568. DOI: 10.7655 CSTR:
Abstract:Objective:To explore the anatomical characteristics of the peripheral pulmonary arteries in lung by observing the cross-sectional images of Chinese digitized visible human and making three-dimensional reconstruction of the pulmonary artery system. Methods:A series CVH images of chest were consecutively observed, then the pulmonary arteries were labeled in these images. At last,the labeled images were inserted into computer to make three-dimensional reconstruction. Results:The pulmonary arteries could be recognized in CVH images and reconstructed. The three-dimensional images perfectly show the brunches of the pulmonary arteries, even the subsubsegmental arteries(fifth order) were able to be recognized. Conclusion:The research reconstructed and visualized the pulmonary arteries of the first Chinese Visible Human. The digitalized visible model of the pulmonary arteries can display the special conformation of this region using reconstructed three-dimensional images. It will help in anatomical teaching and provide morphological data for imaging diagnosis and operation of lung.
ZHANG Chang-he , LI Jun , GE Wen-gang , LIU Xian-zhong , ZHONG Ji-wei , LI Xiang-cheng
2007(6):565-568. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the effect of prograf on remnant hepatocellular carcinoma cells in the liver receptors after liver transplantation for liver cancer, and to instruct the anti-rejection drug selection. Methods:MTT assay,RT-PCR and Western blot were used to examine the expression of c-met and TGF-α in the hepatocellular carcinoma cell line HepG2 cultured in vitro. Results:The expression of c-met and TGF-αin prograf group(at concentration of 5 μg/L) was much lower than that in the control group(P < 0.05). Conclusion:Prograf can inhibit the proliferation of hepatocellular carcinoma cell.
CHEN Xi-min , QI Xiao-hong , DUAN Lei , Zhu Li-qun , FENG Zhen-qing , CHEN Qiang , WU Jun
2007(6):569-572. DOI: 10.7655 CSTR:
Abstract:Objective:To prepare and identify poly aspartic acid-co-glutamic acid-metronidazole(PAG-MTI) nanoparticles.Methods:Metronidazole was conjugated into polymers. The structure, morphology and particle size of PAG-MTI were characterized by infrared spectrophotometry, ultraviolet spectrophotometry, transmission electron microscope and laser diffraction-based particle size analyzer. Metronidazole release behavior from these polymers was also determined in vitro. Results:PAG-MTI nanoparticles were spherical in morphology; drug loadings were 12%, and average size of nanoparticles was198.9 nm. The release of metronidazole in PAG-MTI was sustained obviously. The accumulation rate of metronidazole was 12.19% at 1 h, and 47.51% at 24 h after released. Conclusion:PAG-MTI nanoparticles by chemosynthesis can delay metronidazole release in vitro. It may be considered as a promising approach in the treatment of T.vaginalis.
DING Gou-fang , FANG Hai-fei , XU Yin-feng , YU Di
2007(6):573-575578. DOI: 10.7655 CSTR:
Abstract:Objective:To study the correlation between the expression of TGF-β1mRNA in gastric cancer tissues and the tumor lymph node metastasis and survival rate after operation,the expression can be used to estimate progression and prognosis. Methods:Using in situ hybridization method,66 specimens and 10 normal tissue specimens(controls) were tested for the expression of TGF-β1mRNA. The survival rate after operation was investigated also. The correlation between TGF-β1mRNA and survival rate was analyzed. Results:The gastric cancer in 66 specimens died in 5 year was 88.46%(23/26). The positive expression rate of TGF-β1mRNA in gastric cancer was 86.36%(57/66),while it was 10.00%(1/10) in controls,indicating significant difference between them(P < 0.01). The negative and lower positive expression of TGF-β1mRNA in those who died after 5 years was 47.50%(19/40),in those who died in 5 year was 52.50%(21/40),indicating significant difference between them(P < 0.05). The middle and strong positive expression of TGF-β1mRNA in those who died after 5 years was 11.54%(3/26), in those who died in 5 year was 88.46%(23/26). The positive expression of TGF-β1mRNA in those who have no tumor lymph node metastasis was 75.00%(24/32),while it was 97.06%(33/34) in those who have tumor lymph node metastasis,indicating significant difference between them(P < 0.05). There was positive correlation between the higher expression of TGF-β1mRNA and the worse prognosis and rapid progression of gastric cancer. Conclusion:TGF-β1 can stimulate gastric cancer grow and become more aggressive and the tumor lymph metastasis. The detection of TGF-β1mRNA can be used to estimate gastric cancer patients,progression and prognosis.
LI Shi-jie , KONG Xiang-qing , SHENG Yan-hui , YANG Rong , CHEN Jie , LI Sheng-nan , CAO Ke-jiang
2007(6):579-582. DOI: 10.7655 CSTR:
Abstract:Objective:To assess the hemocompatibility of biomaterial covalently coated by chitosan/heparin designed for the closure of congenital heart defects in vitro. Methods:Chitosan(Chi)/heparin(Hep) was covalently immobilized onto the surface of Nitinol slices. The hemocompatibility of biomaterials was evaluated by using the hemolysis test. Anticoagulant activity was studied in vitro in a dynamic model with whole blood, and partial thrombin time(APTT), prothrombin time(PT), fibrinogen time, thrombin time(TT) and D-Dimer respectively. Surface characterizations such as protein adsorption and platelet adhesion were performed by using scanning electron microscopy. Results:White blood count, red blood count and platelet count(PC) were all in normal range and there were no evident difference in each group. The hemolysis rates of biomaterials was all less than 5%. Chi/Hep did significantly prolong the APTT, PT, and TT. In addition, the APTT, PT, and TT in groups coated with different concentration of Hep showed no significant difference. The immobilization of Chi/Hep caused the protein adsorption, platelet adhesion, and thrombus formation were all reduced by the immobilization of Hep. Conclusion:In vitro hemocompatibility of biomaterials designed for the closure of congenital heart defects can be improved by conjugating Chi/Hep onto the surface.
TIAN Jin-ping , YANG Rong , SHENG Yan-hui , TAO Jin-song , LI Shi-jie , XU Di , ZHOU Lei , YONG Yong-hong , YAO Jing , CAO Ke-jiang , KONG Xiang-qing
2007(6):583-585597. DOI: 10.7655 CSTR:
Abstract:Objective:To assess the safety and efficacy of the transcatheter closure of patent ductus arteriosus(PDA). Methods:A follow-up study was conducted in patients with PDA underwent transcatheter closure in our hospital. All patients were assessd with physical examination, X-ray, and echocardiography before the operation. During the follow-up time, the patients’ cardiac function and complications were evaluated. Results:175 patients underwent transcatheter closure had been followed up. The patients were followed up from 1 to 77 months after operation. Minimal residue shunts were found in 9 cases(5.14%) immediately after closure. 3 cases(1.71%) were detected increased blood velocity in descending aorta or pulmonary aorta. At 1 month follow-up,no residue shunt was found. 3 cases with increased blood velocity returned to normal during 1~5 years follow-up. The heart structure was significantly changed 1 week after operation. The mean value of left atria diameter, left ventricular end systolic diameter,left ventricular end diastolic diameter,left ventricular end systolic volume and left ventricular end diastolic volume measured by echocardiography before the operation were(31.6±7.8)mm,(33.0±7.6)mm,(51.6±10.6)mm,(40.3±19.5)ml,(118.6±32.5)ml and(77.7±38.1)ml,respectively. These values were decreased to(29.4±6.6)mm,(30.8±6.7)mm,(47.5±9.2)mm,(34.6±19.0)ml, (80.3±29.6)ml and(64.5±31.1)ml, respectively, 1 week after operation(P < 0.05). There was no significant difference between pre-operation and 1-week or 1-month after operation. There were no severe complications or deaths in this group of patients during follow-up. Conclusion:This study suggested transcatheter closure of PDA could improve cardiac function of these patients, and also confirmed the safety and efficacy of those during short-term and long-term follow-ups.
CHEN Xiao-dong , XU Di , ZHOU Lei , YONG Yong-hong , CHEN Li , WANG Ying-ying , ZHANG Rong , LIAO Ming-yang
2007(6):586-589. DOI: 10.7655 CSTR:
Abstract:Objective:To evaluate ventricular segments motion on AAI mode and DDD mode with optimal atrioventricular interval by the quantitative tissue velocity imaging(QTVI), and to investigate whether AAI pacing mode was superior to the DDD pacing mode with optimal atrioventricular interval in sick sinus syndrome(SSS) patients withⅠdegree atrioventricular block(I°AVB). Methods:Twenty four patients with implanted DDD pacemakers for SSS with I°AVB(PR interval > 200 ms and < 260 ms) were studied at four-chamber view, two-chamber view and apical longitudinal view using QTVI. The regional parameters, including peak sustained velocity(Vs), peak early diastolic velocity(Ve), peak late diastolic velocity(Va) and peak systolic displacement(D) of the basal and middle segments in left ventricle(anterior septal, anterior, lateral, posterior, inferior and septal wall) and in the free wall of right ventricle were measured. Results:There were significant differences in the parameters(Vs, Ve) of most basal segments between AAI group and DDD group(P < 0.05). There were no significant differences in other parameters between both modes(P > 0.05). Conclusion:① In AAI pacing mode, ventricular systolic and diastolic function are superior to DDD pacing mode with optimal atrioventricular interval in patients with SSS, which intrinsic AV conduction are moderately prolonged; ②The change of ventricle segments motion can be early evaluated by QTVI in AAI and DDD mode, and it is useful to determine the optimal pacing mode in SSS patients withⅠ° AVB.
YUAN Li-hua , ZHANG Bing , ZHU Bin
2007(6):590-593605. DOI: 10.7655 CSTR:
Abstract:Objective:To evaluation the role of myocardial perfusion ,viability and MRI cine in myocardial infarction of pig model and patients. Methods:14 pigs with myocardial infarction(3 days),12 pigs with myocardial infarction(3 weeeks) and 17 patients underwent MR scanning. MR cine imaging acquaired by BFFE sequence were used to analyze the motion of heart. T1TFE sequence was used to detect the first pass perfusion after injection of Gd-DTPA(0.1 mmol/kg). Inversion recovery viability sequence was used to recognize the high signal in the infarct myocardia. Results:The incidence of the low signal detected in the first pass perfusion weighted images in the infarct myocardia of 3-days pigs,3-weeks pigs and 17 patients were respectively 100%,92%and 82.3%. The incidence of enhancement region detected in the delayed viability sequence images in the infarct myocardia of 3-days pigs,3-weeks pigs and 17 patients were respectively 7%, 50%and 88.2%. The myocardial wall of hyper enhancement had a weaken motion in MR cine images. The symptom of attenuation and keeping low signal of myocardial wall in viability images was detected in the obvious fibrosis myocardia or scar. Conclusion:The combination of all image findings in the first pass perfusion, viability imaging and cine MR might discriminate the true infarction and scar of heart effectirely.
CHEN Gang , CHEN Sen-qing , ZHANG Xiao-mei , SHANG Jun-qing , ZHOU Jian-nong
2007(6):594-597. DOI: 10.7655 CSTR:
Abstract:Objective:To explore the significance loss of Kai-1 gene plays in the progression and metastasis of colorectal cancer (CRC). Methods:The deletion of Kai-1 gene were detected by using RT-PCR and validated by sequencing in the tumor of 40 cases of CRC and 15 normal cases near the tissues of CRC. Results:The deletion of exon 9 in the Kai-1 gene was found in 18 of 40 colorectal cases(45%) and in 2 of 15 normal cases near the colorectal tissues(13.3%). The frequency of the exon 9 deletion was significantly higher in the colorectal tumors than in the normal cases(P < 0.05). The frequency of the exon 9 deletion was significantly higher in the colorectal tumors with lymphatic metastasis than that without lymphatic metastasis(P < 0.05), and in the advanced stage(Dukes C,D) than in the earlier stage(Dukes A,B) of the colorectal cancer(P < 0.05). However, there was no significant difference of the frequency of exon 9 deletion when stratefied by the the age, sex, histological type as well as differentiated degree of the patients with CRC(P > 0.05). Conclusion:The deletion of the Kai-1 was associated with the progression and metastasis of CRC, and the detection of the deletion of the Kai-1 can be considered as an objective clinical marker to assess the progression and metastasis of CRC.
WANG Jian-li , TANG Jin-rong , SU Jian-hua , HOU Xi-de , ZHANG Ping , ZHU Xue-jiang , WU Le , XIAO Hang
2007(6):598-601. DOI: 10.7655 CSTR:
Abstract:Objective:To study the influences on expression of vascular endothelium growth factor(VEGF) and nervous conduction by improving microcirculation following crushing lesion of sciatic nerve in rats. Methods:Sciatic nerve was crushed used pincers to establish the model of sciatic nerve crush lesion in rats. The expression of VEGF in dorsal ganglion cells at 12 h,72 h,7 th days and the distance between right behind toes, nerve conduction velocity of sciatic nerve at 4th week were examined respectively by immunohistochemical and electrophysiologic techniques. Then their results were compared with each other. SD rats were divided into control group, model group, alprostadil(Lipo-PGE1) group and buflomedil hydrochloride group at random. There were 16 rats in each group. SPSS 10.0 was used statistically. Results:①The expression of VEGF in dorsal ganglion cells increased from 12 h after crush injury of the nerve, and have increased to the highest at 72 h after crush injury of the nerve(P < 0.01). There was no increasing of it in normal group. It increased in alprostadil group and buflomedil hydrochloride group more than model group significantly(P < 0.01). It became normal on 1 th week in all groups after sciatic nerve crush injury. ②On 4th week after sciatic nerve crush injury, distance between right behind toes and nervous conduction velocity of sciatic nerve in alprostadil group and buflomedil hydrochloride group were more optimal than those in model group(P < 0.01) and no more optimal than those in normal group(P < 0.05), while there was normal in control group. Conclusion:The expression of VEGF increase and the nervous conduction velocity of sciatic nerve elevate by improving microcirculation significantly after sciatic nerve crush lesion, so that it has improving action to repair peripheral nerve crush lesion.
ZOU Rong , CHEN Ping , JIN Wen-jie , HUANG Ya-hui , QIAN Yan-ning
2007(6):602-605. DOI: 10.7655 CSTR:
Abstract:Objective:To observe the effect of different concentrations of thiopental and Midazolam on the differentiation of T helper cells in vitro in adults. Methods:Peripheral venous blood samples were collected from 20 middle-aged healthy donors. In each volunteer,20 ml of blood was divided into 7 groups:control group,3 thiopental groups(4 μg/ml,20 μg/ml, 40 μg/ml),3 midazolam groups(50 ng/ml, 150 ng/ml, 500 ng/ml). Whole blood and mononuclear cells from peripheral blood(PBMCs) were incubated with different concentrations of thiopental and midazolam for 24 h, while the control group without any drugs. Then the stimulants- phorbolmyristate+lonomycin+glogistop were added to whole blood and phytohemagglutinin(PHA) was add to PBMCs. The whole blood was incubated for another 4 h and PBMCs were incubated for another 48 h. Then the T-lymphocytes were collected for determination of intracellular level of IFN-γ(as a marker of Th1 cells) and IL-4(as a marker of Th2 cells) in the whole blood using flow cytometry and the expression of CCR5+(as a marker of Th1 cells) and CCR3+(as a marker of Th2 cells) in PBMCs. Results:Compared with the control group, in thiopental 20 μg/ml, 40 μg/ml group, the percentage of Th1 cells decreased significantly. Among different concentration in thiopental groups, the percentage of Th1 cells in high-dose or middle-dose group was obviously lower than that in low-dose group, the percentage of Th2 cells in high-dose was obviously lower than that in low-dose group. In midazolam group, there was no significant change. Conclusion:Thiopental can inhibit Th1 activity and shift the balance towards immunosuppressive Th2-like responses predominantly. Midazolam has no significant effect on Th1 and Th2 activity.
HUANG Ya-hui , TAN Shan-bai , LIANG Ping , LIU Cun-ming
2007(6):606-608. DOI: 10.7655 CSTR:
Abstract:Objective:To evaluate the effect of remifentanil pretreatment on propofol injection pain. Methods:A double blind and randomized study of 150 adults undergoing general anesthesia(GA) for elective surgery was conducted. All patients were randomly assigned to one of the three groups: groupⅠ(n = 50) received 10 ml of remifentanil 50 -滋g pretreatment, groupⅡ(n = 50) received 2% lidocaine 40 mg pretreatment, and group Ⅲ received normal saline pretreatment followed 30 s later by propofol 2 mg/kg. During induction of GA, the pain response was recorded. Hemodynamic data were also recorded. Results:The incidence and intensity of injection pain was significantly less in the group ⅠandⅡ than those in the group Ⅲ(P < 0.05), and the hemodynamic data were not significantly changed(P > 0.05). Conclusion:Propofol-induced pain can be reduced by remifentanil pretreatment.
YANG Nai-ming , LIU Jia-yin , DING Wei , HUANG jie , GAO Yan
2007(6):609-611. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the clinical characteristics and treatment of ovarian hyperstimulation syndrome(OHSS). Methods:Clinical data of 70 OHSS patients were analyzed retrospectively. Results:OHSS mainly occurred after pro-ovulation treatment. Abdominal distension,nausea,ascites,edema,oligria,concentrated blood,hypoalbuminemia were the major manifestations of OHSS,which could be controlled by intensive care,supplementation of alburmin or plasma,volume expansion,and paracentesis. Conclusion:Great attention should be paid to prevention OHSS when enhancing ovulation. Intensive care is necessary in the treatment of moderate and severe OHSS.
CHEN Li-xun , WU Ling , HUANG Jin , ZHAO Gui-yang , ZHAO Feng
2007(6):612-614618. DOI: 10.7655 CSTR:
Abstract:Objective:To evaluate postoperative corneal swelling as a predictor of corneal endothelial cell loss after phacoemulsification cataract surgery. Methods:This study included 428 eyes which were performed routine phacoemulsification surgery. Ultrasonic pachymetry and endothelial photography of the central of the cornea and Orbscan II slit-scan tomography were performed preoperatively, on the the first day after surgery and three months after surgery. SPSS 13.0 was used for statistical calculations. Independent-Samples t test and repeated measures were used to test differences and a backward stepwise multiple regression analysis were performed to indentify the variables independently contributing to the corneal endothelial cell loss. Results:The ratio of endothelia cell loss 3 months after phacoemulsification cataract surgery was 18.34 ± 11.63% from 1.56% to 59.30% in this study. It was closely related to phaco time, nuclear hardness and corneal pachymetry chang to first day after surgery. Conclusion:In this study, the degree of permanent corneal endothelial damage had significant correlation with the degree of early postoperative corneal swelling. Measuring the difference in phachymetry at postoperative first day is a useful way to assess the effects on the corneal endothelium exerted by the phacoemulsification procedure.
SUN Xiao-li , GUO Yan , XU Jia-chang , PING Ying , ZHOU Xiao-yu
2007(6):615-618. DOI: 10.7655 CSTR:
Abstract:Objective:To investigate the levels of blood plasma estradiol(E2) and testosterone(T) in neonatal hypoxic-ischemic encephalopathy(HIE) and explore the relation of blood plasma E2 and T with the developing of HIE, and to supply guidance for diagnose and therapy of HIE. Methods:Blood plasma E2 and T levels were measured by electrochemiluminescence in 57 neonates with HIE(21 mild,21 moderate,15 severe HIE) at the acute and convalescence stages. Thirty neonates were used as control. Results:Blood plasma E2 and T were significantly higher at acute stage but significantly lower at convalescence stage in moderate and severe HIE neonates compared with those of control and mild HIE neonates. Blood plasma E2 and T decreased in moderate and severe HIE neonates at convalescence stage compared with those at the acute stage. The diversity of blood plasma E2 and T were unification with the levels of NBNA. Conclusion:E2 and T might be involved in the pathophysiological process of HIE. The levels of E2 and T closely relate to the severity of HIE.
ZHANG Hua-jun , MIN Jie , WANG Pei , HU Xiao-jiang
2007(6):634-636. DOI: 10.7655 CSTR:
Abstract:Objective:To study how to model zero-inflated count data, and apply it to handle the data about respiratory infection. Methods:Zero-inflated model with 2 parts,zero and Poisson distribution, were transformed to conditional zero-inflated model. Logit and Log linkage function were used to promote the explanation of the result. Results:The results of significant risk factors were those who were younger and live lower in the ZTP part; the risk factors were younger exerciser, having history of chronic respiratory system disease and ill body conditions in the LOGIT part. Conclusion:The conditional zero-inflated model could be easier to explain the affected factors.
CAO Gan , GUAN Wen-hui , WU Xiao-gang , HU Hai-yang , SHI Ping , HUAN Xi-ping , YANG Hai-tao , WANG Ning
2007(6):637-640. DOI: 10.7655 CSTR:
Abstract:Objective:To understand knowledge,attitudes,high risk behavior related to HIV/SYPHILIS and the infection rate of HIV/SYPHILIS among men have sex with men(MSMs), and to provide the effective information and evidence for prevention intervention. Methods:A anonymous investigation was applied in target object in the balneary where MSM massed, and their blood were gathered to take HIV/SYPHILIS tests. Results:Their integrated awareness rate of HIV was 75.3%. Only 21.6% MSM used condom when they had anal sex with same sex, 78.4% MSM never used or sometimes used. 117 MSMs who had sex behavior with female partners within recent 3 months, and rate of using condom was only 19.7%. The infection of HIV,TPPA,RPR,was 4.7%,39.9%,27.0%. The correlation between HIV/SYPHILIS infection and age,number of anal sex partners within 3 months,marriage status,education,using of condom,native place was insignificant. Conclusion:The high risk sexual behaviors are common seem among the MSMs in balneary,and the infection of HIV/SYPHILIS in MSMs were quite high. Safe sex involved behavior intervention programs should be effectively carried out as well as strengthened health education programs to MSMs in order to control the rapid spead of HIV/STDs.