Objective To investigate the effect of Astragalus and chemotherapy on the expression of vascular endothelial growth factor(VEGF)in non-small cell lung cancer(NSCLC), microvessel density(MVD)and immune function.Methods 92 patients with NSCLC were divided into the study group and the control group, 46 cases in each group.Both groups were treated with neoadjuvant chemotherapy and operation, and the study group was treated with astragalus polysaccharide.The expression of VEGF in cancer tissues, MVD and immune function were compared between the two groups.The short-term and long-term curative effect and the incidence of adverse reactions were recorded.Results After treatment, positive rates of VEGF, MVD and blood CD8+ were significantly decreased in two groups (P<0.05), showing study groupcontrol group (P<0.05).There were no significant differences between the two groups in short-term curative effect and 5 year survival rates.The incidence rates of side effects in the study group were significantly lower than those in the control group (P<0.05).Conclusion Adjuvant chemotherapy combined with intravenous infusion of Astragalus Polysaccharide can improve MVD, the expression of VEGF and immune function in patients with NSCLC.

Objective To explore the operative technique of endoscopic thyroidectomy and prevent its complications.Methods A retrospective analysis was made on the clinical data of 32 patients with benign thyroid diseases who were treated with endoscopic thyroidectomy between May 2002 and March 2005.Results Thirty-two cases were successfully treated with the mean operation time 130 min(80～180 min).Twelve cases with thyroid adenomas and 20 cases with thyroid tubers were confirmed by histologic examinations.In this group,the postoperative complications included fat liquefaction in 2 cases and transient hoarseness in 1 case who recovered 3 months after operation.No parathyroid injury occurred.The drainage tubes were removed 2~3 days after operation.All of the patients were discharged 2~5 days after operation.Conclusion Endoscopic thyroidectomy is safe and feasible with favorable cosmetic effect.

Objective To explore the relation of donor liver's heme oxygenase-1 level to ische-mia/reperfusion injury and the liver function after liver transplantation. Methods Twenty-eight pa-tients receiving orthotopic liver transplantation (OLT) were divided into two groups according to the donor liver's heme oxygenase level of high HO-1 expression group and low HO-1 expression group.The recipients' serum levels of ALT, AST, bile salt output and the expression of HO-1 mRNA were determined and compared between the 2 groups. Results HO-1 mRNA of low expression group in-creased significantly after the reperfusion. Meanwhile, the HO-1 mRNA of high expression group de-creased. The serum levels of ALT and AST of HO-1 in low expression group were much lower but bile salt concentration higher than those in high expression group. Conclusion HO-1 can be further induced in the liver of HO-1 low expression group during the reperfusion period. The I/R injury in the HO-1 low expression group was less severe than that in high expression group, but the liver function was better. The increase of HO-1 during the transplantation seems better for protecting the liver than the initial HO-1 high expression. Kupffer cells are of the main localization for HO-1 protein in human liver.

OBJECTIVE:To observe the protective effect of the traditional Chinese medicine Yiqimingmu oral solution on photochemical damage of retina in rats. METHODS:SD rats were divided into four groups randomly:negative control group, model group, low dose Yiqimingmu oral solution group and high dose Yiqimingmu oral solution group. All the groups except the control one were continually exposed to Lux (1 900?106.9) green fluorescent light for 24 hours to establish retinal photochemical damage model. The low dose and high dose groups were administered intragastrically with Yiqimingmu oral solution (15mL?kg-1?d-1 and 30mL?kg-1?d-1) 7 days before light expose. Normal saline solution was administered intragastrically in control and model group. At 6 hours and 6, 14 days after light expose, the content of malandialdehyde (MDA) and activity of SOD in rats' retina were measured. The histopathologic changes were observed by transmission electron microscopy and light microscopy. RESULTS:At 6 and 14 days after light expose, the activity of SOD in Yiqimingmu solution high dose group were higher than in the model control group(P

Objective To investigate the feasibility and therapeutic efficacy of inverted Y-shaped silicone airway stent for complex airway diseases (stenosis or fistula). Methods According to the particular anatomic structure and the pathological changes of complex airway diseases, the inverted Y-shaped silicone airway stents were designed. 7 stents were implanted in 7 cases of airway complex diseases with the guidance of interventional rigid bronchoscope under general anesthesia. Results The Y-shaped silicone stents were placed successfully followed with the result of immediate relieves of the symptoms. Dyspnea grade was improved significantly from Ⅲ~Ⅳ to 0 ~Ⅱ , and oxygen saturation elevated from ( 84.1 ± 4.5 ) % in inspiring high concentration oxygen to ( 94.1 ± 2.9 ) % in breathing ambient air (P = 0.000). The main complications were cough, foreign body sensation, chest pain, granulation, sputum retention, et al. Conclusion Placement of Y-shaped silicone airway stent is a feasible and safe treatment for complex airway disease, the recent curative effect is reliable, it is worth further promoting.

AIM To modify and improve a screening assay so that it becomes more convenient, economic and adaptable in China for high throughput screening of HIV fusion inhibitors targeting gp41. METHODS The original screening method reported by Jiang et al (J Virol. Methods 1999;80:85 96) was modified by: ① using a conformation specific monoclonal antibody to replace a polyclonal antibody for coating plates; ②simplifying the procedures; ③using parts of the reagents produced in China. RESULTS The modified screening assay is simpler, more convenient, and more economic than the original assay, but its sensitivity is comparable to and specificity is a little better than the original method. CONCLUSIONS The modified screening assay is more convenient and economic and can be used in China for high throughput screening of HIV fusion inhibitors from complex sample, such as phage display peptide libraries, microorganism fermentation liquids, herbs and other natural products.

Objective To observe whether rabbit blood leptin can leak into the brain after craniocerebral trauma (CCT),and to dynamically detect serum levels of leptin,growth hormone (GH),and insulinlike growth factor-1 (IGF-1),and leptin level in cerebrospinal fluid (CSF) after CCT.Methods The FITC labeled leptin was injected into blood vessels of 15 adult male rabbits after anesthesia.Then 9 rabbits underwent unilateral fluid percussive impact,while 6 rabbits underwent sham operation.Thirty minutes postoperatively,brain tissue was taken to make frozen sections which were used to observe fluorescence labeled leptin range.Thirty three adult male rabbits were randomly divided into serum group,serum-control group,CSF group and CSF-control group.Rabbits in serum group and CSF group received fluid percussive impact,while rabbits in serum-control group and CSF-control group were drilled a 7 mm window in skull.Rabbits in serum group and serum-control group were phlebotomized 2 ml at 1 d,3 d,7 d and 14 d after operation,and rabbits in CSF group and CSF-control group were extracted CSF 0.5 ml at the same time points.Then serum levels of leptin,GH,and IGF-1,and leptin level in CSF were tested by ELISA.Results The fluorescence imaging could be seen in the injured brain tissue of rabbits with CCT,which was more than those in brain tissue of rabbits receiving sham operation.Serum leptin levels of rabbits in serum group at each time point were higher than those in serum-control group.Serum levels of GH and IGF-1 and leptin level in CSF were higher in rabbits with CCT than those in rabbits without CCT at 1 d,3 d and 7 d after operation.Conclusion The blood leptin can leak into the brain after CCT,which can cause increase of blood GH and IGF-1.And the latter may be the endocrine factors promoting fracture healing after CCT.

Objective:To study effects of large dose thymopeptides on T cell subpopulations of patients with malignant tumor under radiotherapy.Methods:Fifty one patients with malignant tumor under radiotherapy were divided into 2 groups with 100 mg and 200 mg thymopeptides respectively.The patients we re given thymopeptides,100 mg/d or 200 mg/d,iv, for 10 days.The positive percent ages of CD4,CD8,CD25 and CD56 in T cells of peripheral blood before and after thymopeptide treatment were determined by flow cytometry.Results:The positive percentages of CD4 and CD25 in T cells of peripheral bl ood after 100 mg/d thymopeptide treatment were significantly higher than those befor e thymopeptide treatment (P<0.05),while those of CD4，CD8，CD25 and CD56 in T cells of peripheral blood after 200 mg/d thymopeptide treatment all increased significantly (P<0.05 or P<0.01). Conclusion:These results suggest that large dose of thymopeptides can increase i mmune function of patients with malignant tumor under radiotherapy,and the curat ive effect of 200 mg/d thymopeptides is better.