BACKGROUND:The precise pathogenesis of recurrent aphthous ulcers remains controversial in present medical science. Oxygen free radical increase in the body is one of the causes of recurrent aphthous ulcers. OBJECTIVE:To observe the effects of superoxide dismutase on the therapeutic effect of recurrent aphthous ulcers. METHODS:After establishing 24 rabbit models of recurrent aphthous ulcers, they were randomly assigned to three groups. Model control group as a contrast was not treated. Rabbits in the negative control group were cleaned with iodoglycerin in local region daily. Rabbits in the superoxide dismutase group were intragastricaly administered with superoxide dismutase capsule solution. Local ulcer was cleaned with iodoglycerin. One week later, tissue with oral ulcer lesions was obtained and compared. In each group, after model establishment, blood was colected from rabbit ear vein at the same time in the morning every 4 days. Flow cytometry was used to analyze the changes in T cel subsets CD3+, CD4+, CD8+, and CD3+/CD8+. RESULTS AND CONCLUSION: When the ulcer lesions formed, peripheral blood CD3+, CD4+, CD4+/CD8+ ratio through statistics was apparently lower than normal levels in the model control group and negative control group. However, the number of CD8+ cels was greatly more than normal value. In the superoxide dismutase group, after administrated with superoxide dismutase capsule, the number of CD3+ and CD4+ cels was gradualy increased, but the number of CD8+ cels showed a decreased trend. These data suggested that natural scavenger superoxide dismutase using oxygen free radical can effectively scavenge excessive oxygen free radical in the ulcers, resulting in treatment of recurrent aphthous ulcers.

Objective To evaluate the clinical effects and complications in treating colonic polyps between endoscopic submucosal dissection and laparoscopy.Methods 69 colonic polyps patients diagnosed by colonoscopy with the basal body diameter of the colonic polyp >2.0 cm were enrolled in this study. All the patients were divided into study group (n = 41) and control group (n = 28) according to patients' decision, and then treated with ESD and laparoscopic surgery separately. After treatment, all the patients were followed up and repeated colonoscopy after 6 months. Clinical data were recorded and analyzed at the end of the research.Results Patients were successfully operated in both groups. 1 case in each group was diagnosed of malignant tumor and needed further treatment. The average operation time in study group and the control group was (85.00± 36.50) min and (110.00 ± 45.70) min (P < 0.05), length of hospital stay of the two groups were (10.69 ± 3.09) d and (11.61 ± 6.41) d (P < 0.05), and average cost of hospitalization of the two groups were (15.7 ± 2.7) ten thousand RMB and (30.6 ± 5.9) ten thousand RMB (P < 0.05). Percentage of complications in the study group was 2.43% comparing to 14.29% of control group(P < 0.05). 1 case in the study group complicated with enteron hemorrhage. Complications in the control group was 2 cases of ileus, 1 case of infection, 1 case of intestinal fistula. No recurrence was found in the two groups after 6 months in the repeat colonoscopy.Conclusion Both of the two treatments are effective for patients with wide base colonic polyps, but malignant tumor must be cautioned when treating with wide base colonic polyps. Endoscopic submucosal dissection requires proficient skill while with less impairment and cost.

Objective To explore the relationship between TSLC-1 protein expression and the progression and carcinogenesis of human papillary thyroid carcinogenesis. Methods Expressions of TSLC-1 protein in 20 pieces of benign thyroid lesions and 40 pieces of papillary thyroid carcinoma tissues were examined by immunohistochemistry. Results The expression of TSLC-1 in papillary thyroid carcinoma (9/40) was lower than that in benign thyroid lesions (22.50% versus 90.00%, P < 0.05). Expression of TSLC-1 was significantly associated with lymph node metastasis and TNM in papillary thyroid carcinoma (P < 0.05). Conclusions Expression of TSLC-1 is closely related with carcinogenesis , lymph node metastasis , and clinical stage in papillary thyroid carcinoma.

Objective To study the synergistic effect of endostatin (YH-16) and irradiation on human non-small cell lung cancer (NSCLC) cell line A549 and the expression level of vascular endothefial growth factor. Methods ① A549 cells were exposed to various concentrations of endostatin for different time. The optimal concentration giving ≤20% inhibition concentration (IC20) by MTT assay was selected. ② The cells were divided into 4 groups:control group,chemotherapy alone,radiotherapy alone,and radio-chemotherapy group. All groups were exposed in distinct treatment,the cells survival fraction and the plating efficiency of the four groups provided to select the optimal radiotherapy dosage. ③ The radio-chemotherapy group had been exposed to endostatin for 48 hours,followed by irradiation at 48 hours with various doses:0,2,4,6,8 Gy. After 14 days,the cell clonogenic survival curves and the SER were evaluated. ④ Detect the different groups' VEGF value by ELISA kit. Results Incubating cells in 200 mg/L endostatin culture medium the value of SER radiated by linear accelerator in 2 Gy after 48 h were 1.61 and 1.04. And endostatin with proper dosage and radio-exposure time could decrease the VEGF level. Conlusion It is suggested that endostatin enhances the radiosensitivity of NSCLC A549 cell line in vitro (SER=1.61,1.04). The enhancement depends on the time of exposure drug. The optimal radiation time should be 48 hour after exposure.

A total of 96 patients with Graves'disease(GD)were followed for one and half years to observe the effect of antithyroid drugs(ATD)treatment.Serum TRAb,total iodine concentration and CD80 mRNA expression of peripheral blood monouclear ceils were measured.Logistics regression analysis was conducted with the combination of above parameters.Those GD patients with high level of TRAb,positive family history of GD, increased expression of CD80 and early age of onset were more inclined to relapse after ATD treatment.

To investigate the angiotensin I-converting enzyme (ACE) inhibitory activity of beta-chain hemoglobin fragments, 17 fragments were synthesized by microwave-assisted solid-phase synthesis method. Wang resin or Trt(2-Cl) resin, Fmoc and HBTU-HOBt were used as solid carrier, N-terminal amino acid protecting groups and coupling reagents, respectively. The ACE inhibitory, alpha-glucosidase inhibitory, antibacterial and antitumor activities of the synthesized fragments were assayed. In vitro, Val-Val-Tyr-Pro-Trp-Thr showed high ACE inhibitory activity (IC50 = 7.42 micromol x L(-1)). The results indicate that there are two active sites in Val-Val-Tyr-Pro-Trp-Thr-Gln-Arg-Phe, one consists of Val-Val-, and the other -Gln-Arg-Phe. Peptides showed high ACE inhibitory activity when the N-terminal was hydrophobic amino acid such as Val and C-terminal tripeptide contained Phe, Trp or Arg. Some of the fragments showed low a-glucosidase inhibitory activity. No antibacterial activity or antitumor activity was detected in vitro. The results indicate that these peptides have a potential antihypertensive effect and possible application in the treatment of hypertension.

Objective To explore the effect of different doses of irbesartan on osteopontin expression and fibrosis in diabetic rat kidney. Methods Sixty-three g-week old male Wistar rat were randomly divided into control group (Ctrl group,n=7),diabetes group (DM group,n=14),30 mg·kg-1d-1 hydralazine administrated group (DM+Hyd group,n=12),25 mg·kg-1·d-1 irbesartan administrated group (DM+Irb25 group,n=10),50 mg·kg-1 ·d-1 irbesartan administrated group(DM+Irb50 group,n=9) and 200 mg·kg-1·d-1 irbesartan administrated group (DM+Irb200 group,n=11).Four weeks after modeling,rats were administered with the corresponding dose of irbesartan.After 12 weeks,urinary albumin excretion rate (UAER),endogenous creatinine clearance rate (Ccr) were measured; morphology and collagen deposition in rat kidney were observed by PAS and Masson staining respectively; Ang Ⅱ content in kidney was measured by ELISA; renal tissue TGF-β1 and OPN mRNA expression were detected by real-time PCR. Results UAER and Ccr in the intervention groups of irbesartan were significantly decreased compared with DM group (P＜0.05).UAER and Ccr in DM+Irb200 group were significantly lower than those in DM+Irb25 group and DM + Irb50 group (P＜0.05).Glomerular hypertrophy,mesangial matrix expansion,tubular lesions and deposition of collagen fiber were siginficant in diabetic rats compared with Ctrl,and prevented after administration with different doses of irbesartan.Ang Ⅱ protein level and TGF-β1,OPN mRNA expression in renal tissue of diabetic rats were significantly higher than those in Ctrl group.Ang Ⅱ,TGF-β1,and OPN mRNA expression was significantly reduced after administration with different doses of irbesartan,and with the increase of irbesartan,the above indicators were decreased P＜0.05).Renal local Ang Ⅱ level was positively correlated with OPN mRNA expression (r=0.74,P＜0.01). Conclusion Irbesartan reduces renal TGF-β1,OPN mRNA expression by decreasing kidney local Ang Ⅱ in dose-dependent manner,and eventually reduces tubulointerstitial fibrosis,which plays a role in kidney protection.

Gap junction has been considered allowing direct transfer of small metabolites between cells to maintain homeostasis in multicellular organisms. Deficient gap junction involved in genesis and development of many central neurological disorder, and may be a potential target for the treatment of them.

Objective Antineutrophil cytoplasmic antibody (ANCA) associated vasculitis(AAV)is a systemic necrotizing small-vessel vasculitis, and myeloperoxidase(MPO) is one of the main antigens that ANCA can recognize.This study was to investigate the clinical significance of MPO, activated complement C5a fragment and ceruloplasmin ( Cp) in the peripheral blood of patients with MPO-ANCA associated vasculitis ( MPO-AAV) in active phase by observing their changes. Methods 132 MPO-AAV patients at active stage were selected as the patient group, while the control group was made up of 30 healthy controls.Peri-nuclear ANCA (p-ANCA) and MPO-ANCA in the patient group were detected by IIF and ELISA, respectively.The levels of MPO, Cp and C5a in both groups were tested by ELISA.The Birmingham vasculitis activity score (BVAS) of every patient was calculated.In the patient group, the relationship among MPO, Cp, C5a and MPO-ANCA were analysed, and the association between BVAS and each of them was also explored. Results The levels of MPO, CP, C5a in the patient group were significantly higher than those in the health control group [MPO:400.7(333.5~506.1) vs 286.9(225.5~329.1)IU/L, P<0.001;C5a:336.7 (277.6~403.5) vs 236.8 (204.2~304.1) ng/mL, P<0.001;Cp:481.1 (387.9~535.9) vs 326.9 (177.1~405.5) ng/mL,P<0.001].The associations between MPO and Cp, C5a and MPO, C5a and Cp in the patient group were statistically significant ( r=0.663, P<0.001;r=0.792, P<0.001;r=0.637, P<0.001, respectively).No significant correlation was found in MPO-ANCA and any of these indexes.MPO-ANCA had a positive association with the total BVAS, the kidney BVAS, and the lung BVAS ( r=0.247, P=0.004;r=0.339,P<0.001 and r=0.191, P=0.028, respec-tively) .p-ANCA had a positive correlation with the kidney BVAS ( r=0.208, P=0.017) while C5a had a negative correlation with the kidney BVAS ( r=-0.207, P=0.018) . Conclusion The levels of MPO, Cp and C5a increased significantly in the peripheral blood of MPO-AAV patients in active phase.The complex interactions among MPO, Cp, C5a and ANCA might influence the clinical damage in MPO-AAV.Notablely, the influence from MPO-ANCA might be most obvious while C5a might affect renal damage more markedly.

Objective: To establish the quality standard for Shangtongning capsules. Methods: Microscopic identification was used for the qualitative identification of Bombyx batryticatus, Scorpio, Eupolyphaga steleophada, Pheretima, Notoginseng radix et rhizo-ma and Gastrodiae rhizoma. A TLC method was used for the qualitative identification of Chuanxiong Rhizoma, Angelicae Sinensis Ra-dix, Notoginseng Radix ET Rhizoma, Dipsaci Radix and Glycyrrhizae Radix ET Rhizoma. HPLC was used to determine the content of liquiriti. The determination was performed on an Agilent TC C18 (250 mm × 4. 6 mm,5μm) column with the mobile phase consisting of acetonitrile-water(15:85)at the flow rate of 1. 0 ml·min-1. The detection wavelength was set at 276 nm. Results: The features of the microscopic identification were significantly visible. The TLC spots were clear and well-separated without any negative interference. The linear range of liquiriti was 0. 341-1. 193 μg (r=0. 999 9)with the average recovery of 98. 97%(RSD=0. 77%, n=6). Con-clusion:The method is simple, accurate and reproducible, which is effective in controlling the quality of Shangtongning capsules and provides the basis for improving the quality standard for Shangtongning capsules.