Adhesional inhibiton of polyclonal anti-porin I antibody / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate the blockness effects of purified polyclonal anti-porin I antibody on N. gonorrhoeae adherence to genitourinary tract epithelia of BALB/c mouse.</p><p><b>METHODS</b>Polyclonal anti GST-PI antibody was generated by immunizing rabbit with GST-PI fusion protein which was constructed and expressed by ourselves. The purified immunoglobulin G was obtained by ammonium sulphate deposition and DEAE cellulose chromatography. Mice model of gonorrhea was established. In order to evaluate the effects of PI-IgG on gonococcus adhesion to vagina mucus, the macroscopic and pathological assessing as well as gonococcus culture was employed after gonococcus challenge on PI-IgG immunized mice.</p><p><b>RESULT</b>No pus and pathological inflammation were observed on mice vagina mucus treated with 1 mg/ml PI-IgG 3 hours before gonococcus challenge. Gonococcus could not be detected in the smears and washing solutions from vagina. Pathological inflammation was found in mice treated with anti PI-IgG, in which the concentrations were lower than 1 mg/ml or the treated time was longer than 3 hours prior to gonococcus challenge.</p><p><b>CONCLUSION</b>The purified anti PI-IgG can effectively inhibit the adherence and infection of gonococci to genitourinary tract epithelia of BALB/c mice. In addition, the blocking duration of anti PI-IgG is associated with antibody concentration.</p>

Study on the screening program of thalassemia and the genotype and hematologic parameter among people of productive age in a village, Nanning Guangxi / 中华流行病学杂志

<p><b>OBJECTIVE</b>To investigate the carrier ratio and the genotype of thalassemia in the rural people of reproductive age in Nanning, and to analyze the characteristics of hematologic parameter in thalassemia carriers.</p><p><b>METHODS</b>2044 cases of productive age youths were detected with hemoglobin autoanalyse-Variant (HPLC) and Cell Dyn 1700 automatic hemocyte analysator. Among them,430 cases (75 couples randomly selected in thalassemia screening, 140 couples who were told that one or both of them were positive for thalassemia phenotype through hemocyte analysis) carried out thalassemia gene detection in synchronism.</p><p><b>RESULTS</b>163 cases were detected beta-thalassemia and the thus beta-thalassemia carrier ratio was 7.97%. 13 cases were detected HbH disease, and 2 cases Hb Manitoba, 2 cases HbJ, and 1 case HbQ. As for genotypes,-alpha (3.7)/alpha,-alpha(CS)/alphaalpha and -alpha(WS)/alphaalpha were common ones with in alpha-thalassemia-2, --(SEA)/alphaalpha the most common one in alpha-thalassemia-1, and 41-42 were the most common ones in beta-thalassemia heterozygotes. The detection ratio of alpha,beta combination thalassemia was also relatively high. Mean corpuscular volume (MCV) and mean corpuscular hemoglobin (MCH) were low in all cases of HbH disease and beta-thalassemia, also low in 86 cases of alpha-thalassemia-1 with the exception of normal MCH in 1 case, yet normal in 17 cases out of 66 cases of alpha-thalassemia-2. HbF raised in 32 cases out of 69 cases of beta-thalassemia heterozygote, no case showed raised HbF without the raise of HbA2. Hematologic characteristic of alpha, beta combination thalassemia was mainly caused by beta-thalassemia.</p><p><b>CONCLUSION</b>Carrier ratio of thalassemia in rural productive age youths in Nanning was high while alpha-thalassemia-2 with the genotype -alpha(WS)/alphaalpha and -alpha(CS)/ alphaalpha were common. To those with low MCV and MCH in high-risk region, thalassemia should be suspected.</p>

Effects of angiotensin II on connexin 43 of VSMCs in arteriosclerosis / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

<p><b>OBJECTIVE</b>To observe the effect of angiotensin II (Ang II) on expression of gap junction channel protein connexin 43 (Cx43) in the proliferation process of vascular smooth muscle cells (VSMCs) during the early stage of arteriosclerosis.</p><p><b>METHODS</b>Thirty-two adult male rabbits were randomly divided into 4 groups. Rabbits in Group A were fed common diet while others in Groups B, C, and D were fed high-cholesterol diet. Losartan (10 mg/(kg.d)) and ramipril (0.5 mg/(kg.d)) were added in the diet of Groups C and D, respectively. The animals were sacrificed after 8 weeks and abdominal aortas were removed and dissected. The expression of Cx43 was assayed using RT-PCR and Western Blotting analysis.</p><p><b>RESULTS</b>Cx43 was increased markedly in both protein and mRNA level in Groups B, C, and D fed high-cholesterol diet compared with that in control group (P<0.01). Cx43 level in losartan or ramipril treated groups was higher than that in control group (P<0.01, P<0.05), but lower than that in high-cholesterol diet groups (P<0.05, P<0.01).</p><p><b>CONCLUSION</b>Cx43 level was upregulated in VSMCs during early atherosclerosis. Losartan and ramipril can inhibit the expression of Cx43.</p>

Effects of fructose-1,6-diphosphate on concentration of calcium and activities of sarcoplosnic Ca2+-ATPase in cardiomyocytes of Adriamycin-treated rats / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

<p><b>OBJECTIVE</b>To observe the effects of fructose-1,6-diphosphate (FDP) on serum levels of cardiac troponin I (cTnI) and creatine kinase-MB (CK-MB), as well as the concentration of calcium in cardiomyocytes (Myo[Ca(2+)]) and activity of sarcoplosnic Ca(2+)-ATPase (SRCa(2+)-ATPase) in Adriamycin (ADR)-treated rats.</p><p><b>METHODS</b>Rats were intraperitoneally injected with ADR (2.5 mg/kg every other day for 6 times) and then with different dosages of FDP (every other day for twenty-one times). Bi-antibodies sandwich Enzyme linked immune absorption assay (ELISA) was performed to detect serum level of cTnI. CK-MB was detected by monoclonal antibody, Myo[Ca(2+)] was detected by fluorescent spectrophotometry and the activity of SRCa(2+)-ATPase was detected by inorganic phosphate method.</p><p><b>RESULTS</b>FDP (300, 600, 1200 mg/kg) significantly reduced the serum levels of cTnI and CK-MB, while at the same time decreased calcium concentration and increased SRCa(2+)-ATPase activity in cardiomyocytes of ADR-treated rats (P<0.01).</p><p><b>CONCLUSIONS</b>FDP might alleviate the cardiotoxic effects induced by ADR through decreasing calcium level as well as increasing SRCa(2+)-ATPase activity in cardiomyocytes.</p>

Expression of B7-CD28/CTLA-4 in peripheral blood lymphocytes of female patients with genital condyloma acuminatum / 中华皮肤科杂志

Objective To investigate the significance of B7-CD28/CTLA-4 (CD152),co-stimulatory molecules of T lymphocytes,in the onset,development and prognosis of genital congdyloma acuminatum (CA) in females.Methods Flow cytometry was utilized to detect the expression levels of CD80/CD86 in peripheral blood lymphocytes and of CD28/CD152 (CTLA-4) in CD4~+/CD8~+ T lymphocytes from 30 CA patients (17 primary CA,13 recurrent CA,15 at recovery stage of CA) and 15 healthy volunteers as con- trols.Results No significant difference was found for the frequencies of CD80~+,CD86~+,CD4~+/CD28~+ and CD8~+/CD28~+ lymphocytes between the primary or recurrent group and the control group.The frequencies of CD8~+/CD28~+,CD4~+/CD28~+ and CD80~+ lymphocytes were significantly higher in the recovery group than those in the recurrent group (P0.05).Conclusions There is an abnormal expression of co-stimulatory molecules B7-CD28/CTLA-4 (CD152) in periphoral blood lym- phocytes,CD4~+ and CD8~+ T lymphocytes in female patients with genital CA,and the expression abnormaility is closely linked with different disease stages of CA.

Construction of small interfering RNA targeting heparanase gene and its inhibitory effect on the in-vasiveness of human malignant melanoma cell line A375 in vitro / 中华皮肤科杂志

Objective To construct the small interfering RNA (siRNA) targeting heparanase gene and its expressing vector,and to observe its interference effect on the expression of heparanase gene and inhibitory effect on the invasive potential of human malignant melanoma A375 cells.Methods Three siRNAs were designed.The recombinant plasmid pRNATU6.1/heparanase-siRNA was designed and constructed. A375 cells were cultured,and transfected with pRNATU6.1/heparanase-siRNA.The cells treated with lipo- fectamine or Opti-MEM served as the controls.Real-time fluorescence quantitative PCR and Western blot were performed to evaluate the expression of heparanase RNA and protein in these treated A375 cells.The in vitro invasive potential of treated A375 cells was assessed by Matrigel gel assay.Results The siRNA targeting heparanase gene was successfully cloned to the eukaryotic expressing vector pRNATU6.1.The expression levels of both heparanase RNA and protein decreased significantly in siRNA-transfected A375 cells than those in the control cells.The in vitro invasive potential of siRNA-transfected cells was also signifi- cantly inhibited as compared with that of the control cells (P

Expression and significance of platelet membrane glycoproteins and antiplatelet antibody in patients with anaphylactoid purpura / 中华皮肤科杂志

Objective To investigate the expression and significance of platelet membrane glyco- proteins and antiplatelet antibody in patients with anaphylactoid purpura.Methods Forty-five patients with anaphylactoid purpura were divided into three groups according to their clinical manifestations,15 in dermal purpura group,18 in mixed group and 12 in nephritis group.The expression of CD62P,CD63 and CD41 in these 45 patients was detected by flow cytometry.The level of antiplatetlet antibody was analysed by ELISA with monoclonal antibody as the probe.Results The percentage of CD62P,CD63 and the level of an- tiplatelet antibody in patients in acute phase were significantly higher than those in regressive phase and those in normal control.Neither of the expression of CD62P,CD63 and CD41,nor the level of antiplatetlet antibody in nephritis group was significantly different from that in the mixed group.Compared with dermal purpura group,the percentage of CD62P was significantly higher in the nephritis group and mixed group. There was no significant difference in CD41 expression among all groups.Conclusion Abnormal humoral immunity exists in anaphylactoid purpura.The activation of platelet could be closely related to the progress of anaphylactoid purpura.CD62P and CD63 could be considered as an index for monitoring of symptoms, determination of prognosis and predicting the outcome in anaphylactoid purpura.