Objective To explore the endothelial changes of renal artery of hypertension. diabetes and hypertension in-corpora- tion diabetes rat. Methods The scanning electron microscopy was used in experiment. Results The endothelium of renal artery of normal group were smooth and distinct. The surface of the endothelium were showed irregular and finger prints and red blood cells and mono- cytes adhered to endothelium in hypertensive group.All these changes were more prominent in hypertension incorporation diabetes group, so that the mononuclear cells were migrated into endothelium. Conclusion The endothelium of renal artery of hypertension, diabetes and hypertension incorporation diabetes rats showed abnonmal changes.

To explore the effects of lipopolysaccharide binding protein (LBP) on toll like receptor 4 (TLR4) pathway in alveolar macrophages of acute lung injury induced by lipopolysaccharide (LPS) in rats. The TNF ?concentration, IL 1? and IL 18 mRNA expression in alveolar macrophages (AM?) from rats challenged with LPS or LPS + LBP or LPS+LBP+multi LBP antibody (mLBPab) were measured with ELISA and semi quantative reverse transcription polymerase chain reaction (RT PCR) respectively. The expression of TLR4 was determined with RT PCR and Western blot. The results showed that: the TNF ? concentration ,IL 1?, IL 18 mRNA expressions and TLR4 expression were increased significantly in the AM? stimulated with LPS +LBP compared with single LPS stimulation group. However, mLBPab blocked these effects. It is suggested that LBP could enhance the trans membrane transduction function of LPS via TLR4 in rat AM? and these might be the main reason that LBP could enhance the inflammatory activity of LPS, and LBP antibody could be used to alleviate such morbid conditions such as SIRS, acute lung injury, ARDS, and septic syndrome.

Objective To investigate the effect of immunosuppressive drugs on the activity of pancreatic islet cells, and to explore their role in islet allotransplantation. Method Human pancreatic islet cells were isolated and purified in vitro, and their activity was determined by MTT assay after incubation with immunosuppressive drugs in different concentrations. Results The activity of the islet cells was not reduced after exposure to rapamycin at lower concentrations, although exposure to rapamycin at higher concentrations (≥1ng/ml) was associated with a significant inhibition of activity. No reduction of islet cell activity was observed after exposure to daclizumab and FTY720, at either lower or higher concentrations. Conclusion Rapamycin acts to damage islet cells directly, and the degree of the damage was concentration-dependent. No obvious toxicity to the islet cells was observed after exposure to daclizumab and FTY720.

Objective To design and construct a vector of signal transducer and activator of transcription 3 (STAT3) small interfering RNA (siRNA),and to investigate the effect of the recombinant plasmid on the proliferation and apoptosis of gastric cancer cell SGC7901. Methods The PAVU6+27-STAT3 siRNA expression vector was constructed, then transfected into the cultured gastric cancer cells SGC7901 by DOTAP method. STAT3 mRNA and protein in SGC7901 were determined by RT-PCR and Western blotting respectively. Cell proliferation was tested by MTT and 3H-TdR incorporation. Cell apoptosis percentage and bcl-2 expression were observed by TUNEL and flow cytometry respectively. Results The PAVU6+27-STAT3 siRNA expression vector was successfully constructed. In the transfected SGC7901 cells, cell proliferation, 3H-TdR incorporation and bcl-2 expression were decreased, and cell apoptosis percentage was increased. Conclusion PAVU6+27-STAT3 siRNA expression vector may be an efficient method to inhibit the proliferation and promote the apoptosis of gastric cancer cells.

Objective To discuss the results of treatment of proximal humeral fractures in elderly patients with a locking proximal humerus plate. Methods 35 aged patients with proximal humeral fracture were treated with a locking proximal humerus plate from January 2001 to January 2004. Early rehabilitation after operation was performed. Results 35 cases were followed up for 13.2 months on the average. The mean time for bony union was 8.3 (7 to 12) weeks. 1 patient developed an avascular necrosis of the humeral head. According to the Constant Score, the average for all fractures was 81.4 (39 to 95). The excellent and good rate was 85.7%. Conclusion The locking proximal humeral plate proves to be safe and can be recommended for the treatment of proximal humeral fracture in elderly osteoporotic patients.

Objective To observe effects of the antisense genes of Toll-like receptor 4 (TLR4 ) and myeloid differentiation protein-2 (MD2) on the activation of NF-?B in alveolar typeⅡepithelial cells (ATⅡcells) induced by lipopolysaccharide (LPS). Methods Cultured ATⅡcells were randomized to normal cells (control) group,LPS group,LPS+empty vector group,LPS+TLR4 antisense gene group,LPS+MD2 antisense gene group,LPS+TLR4-MD2 antisense gene group. The expressions of TLR4 and MD2 mRNA and protein in ATⅡcells were detected by Northern blotting and Western blotting respectively. The activity of NF-?B in ATⅡcells was measured with electrophoretic mobility shift assay (EMSA). The TNF-? and IL-6 concentrations in the supernatant of cultured ATⅡcells were tested with ELISA.Results Compared with control groups,the expressions of TLR4 and MD2 mRNA and protein,the NF-?? activity,the levels of TNF-? and IL-6 were increased remarkably in LPS group and LPS+empty vector group (P

Objective To construct the recombinant plasmid carrying small interfering RNA(siRNA) to CXCR4 and observe dumbness effect of chemokine receptor gene CXCR4 suppression by RNA interference(RNAi),and explore the new method of more efficacious therapeutic possibilities for HIV-1.Methods Small interfering RNAs targeting CXCR4 gene were designed by using software.The complement form was obtained by annealing and interted into vector Psilencer3.1-H1neo.After sequencing,MT4 cells were transfected using the plasmid vector.RT-PCR and flow cytometry detection were used to evaluate the suppression of CXCX4 expression in different groups.Results The recombinant plasmid had the correct special fragments and DNA sequence detected by PCR,electrophoresis and DNA sequencing;The siRNA obviously suppressed the expression of CXCR4.When transfected with plasmid vector for 48 h,the inhibitory rate was 70%,compared with control and negative groups,there were significant differences(P

Objective To explore the change of serum sIL-2R and IL-6 levels in patients with Kawasaki disease (KD) and its role in the pathogenesis. Methods The serum slL-2R and IL-6 were detected by sandwich ELISA. The serum hs-CRP level was measured by DADE BEHRING BN ProSpec. Results The serum levels of sIL-2R and hs-CRP in KD before and after high-dose intravenous gama globulin(IVIg) were significantly higher than in healthy controls (P

BACKGROUND: Interleukin-6 (IL-6), osteocalcin (OC) and bone alkaline phosphatase (BALP) are involved in bone metabolism, which is correlative with osteoporosis.OBJECTIVE: To observe expression properties of IL-6, OC and BALP in rats with osteoporosis.DESIGN: Control experiment with observation of randomized group division was designed.SETTING: Orthopedics Department of Shenzhen People's Hospital (2nd Affiliated Hospital of Medical College of Jinan University)MATERIALS: The experiment was performed in Animal Laboratory Room and Center Laboratory Room of Shenzhen People's Hospital from January 2002 to January 2003, in which, 60 SD female rats of 6 months were employed, averagely weighted 250 g. They were randomized into 3 groups, named ovariectomized (OVT) group, control and blank group, 20 rats in each.METHODS: In OVT group, the ovaries of rat were removed bilaterally to establish osteoporosis model. In the control, after the ovary was lifted out of abdominal cavity when the abdomen was opened, it was returned back and the abdomen was closed. In blank group, no any management was performed. In 2, 3, 4, 5 and 6 months after surgery, 4 rats were randomized from each group for assays of bone density, OC, IL-6 and BALP.MAIN OUTCOME MEASURES: Changes of bone density, OC, IL-6 and BALP of whole body of rat.assay in rats: In 4, 5 and 6 months, in OVT group, bone density was reduced remarkably compared with the control and blank group [in 4 months:(0.139 5±0.007 8), (0.147 0±0.000 8), (0.145 9±0.002 9) g/cm2; in 5 months: (0.137 9±0.000 9), (0.145 6±0.000 8), (0.144 7±0.000 5) g/cm2; in 6 months: (0.122 6±0.000 4), (0.145 0±0.002 1), (0.144 0±0.000 9) g/cm2, P sults of IL-6 assay in rats: At every time spots, IL-6 in OVT group was sults of BALP in serum of rats: In 4, 5 and 6 months, BALP in OVT group was higher significantly than the control and blank group [(2 026±4) vs (1 247±12), (1 291±7) nkat/L, (2 342±9) vs (1 273±18), (1 342±12) nkat/L,(2 633±15) vs (1 340±9), (1 357±8) nkat/L, P ＜ 0.05].CONCLUSION: In the rats with osteoporosis, bone density is decreased significantly and IL-6, OC and BALP are significantly expressed, which can be taken as the indexes for diagnosis and screen of osteoporosis.Zhang XM, Xu ZS, Xiao DM, Li R.Expression properties of interteukin-6, osteocalcin and bone alkaline phosphatase in osteoporosis rats Zhongguo Linchuang Kangfu 2005;9(43):190-2(China) [www.zglckf.com]INTRODUCTIONOsteoporosis induces complications, like bone fracture, which is associated with various factors, such as estrogen level. Osteocalcin (OC) is a kind of active multi-peptide secreted from osteoblasts,which plays the importance in regulating calcium metabolism and is a new biochemical mark in study on bone metabolism. Interleukin-6 (IL-6) provides powerful bone absorption and stimulation,which plays the important role in coupled information exchange ofbone absorption and formation. In this experiment, ovarietomy was done bilaterally in SD female rats to establish osteoporosis, afterwards, bone density, serum OC, IL-6 and bone alkaline phosphatase (BALP) were determined to probe into their relationship with the incidence of osteoporosis.

BACKGROUND: Recent studies have indicated that cellular apoptosis might be related with the pathological process of diabetic penis erection function disorder. OBJECTIVE: To observe the expression of apoptosis inhibiting gene Bcl 2 and apoptosis inducing gene Bax in the penis cavernosal tissue of diabet ic rats based on the diabetic rat model. DESIGN: A randomized controlled experimental study. SETTING: The Central Laboratory of Jiamusi University. MATERIALS: Fifty male adult Wistar rats were selected. The rats wererandomly divided into normal control group (n=10) and the model group(n=40). The rats in the model group were divided into subgroups according to whether they had diabetes mellitus, namely alloxan medicine control group (n=9) and diabetes mellitus group (n=12). METHODS: The experiment was conducted at the Central Laboratory of Jiamusi University. 20 g/L Alloxan was injected intravenously into the tails of the rats in the model group at a dose of 50 mg/kg. Urine and blood sugar were examined 48 hours after the injection. Diagnosis of diabetes was established when urine sugar was (+++)～ (++++) and blood sugar was above 16.67 mmol/L. The rats in the alloxan group (n=9) were not found to have diabetes mellitus. The rats in the diabetic group were found to have diabetes mellitus, and dead rats were excluded. The blood sugar and urine sugar were measured before experiment and 48 hours, 2, 4, 6and 8 weeks after the experiment. After 8 weeks, the penises were harvested and fixed in 10% neutral formaldehydum polymerisatum. The remaining structures were thoroughly embedded in paraffin, and sections were obtained. Then, apoptosis and the protein of Bcl-2 and Bax were detected in the erectile tissues. 0.5 cm of the middle-section of bulbocavernosus body was collected, and it was then fixed in 10 g/L neutral formaldehydum polymerisatum at 4 ℃ for 24 hours. Then, 5-7 μ m paraffin sections were obtained. The cellular apoptosis was detected with in situ end labeling method. Bcl-2 and Bax gene expressions were detected with histochemical staining. MAIN OUTCOME MEASURES: Cellular apoptosis in the erectile tissues of the rats and genes Bcl-2 and Bax expressions. RESULTS: Nineteen rats died after model establishment and 31 rats entered the stage of the result analysis. ①Cellular apoptosis of the erectile tissues of the rats: The apoptosis rate in the diabetic group was significantly higher than that in the normal control group and alloxan group (16.26±6.63)%,(0.38±0.02)%, (0.40±0.03)%,(q=4.45, P ＜ 0.01). ② Expression of Bcl-2gene of the erectile tissues of the rats: Bcl-2 gene expression of the diabetic group was significantly lower than that in the normal control group and alloxan group [(12.04±2.30)%,(20.88±3.02)%,(21.23±2.58)%,q=4.45,P＜0.01].③Expression of Bax gene in the erectile tissues of the rats: Bax gene expression of the diabetic group was significantly higher than that in the normal control group and alloxan group [(18.35±2.00)%, (9.33±0.56)%,(10.32±0.63)%, (q=4.45, P ＜ 0.01)]. ④ The ratio of Bcl-2 to Bax: The ratio of Bcl-2 to Bax of the diabetic group was significantly lower than that in the normal control group and alloxan group. CONCLUSION: That the cellular apoptosis of the erectile tissues in rats with diabetes mellitus increased suggests that cellular apoptosis is related with diabetic erectile dysfunction. Also, Bcl-2/Bax was down-regulated,and this indicates that Bcl-2 and Bax cooperates in the cellular apoptosis in the diabetic erectile tissues.