ObjectiveTo investigate the effect of thalidomide on the proliferation and apoptosis in human pancreatic cancer cell SW1990 in vitro.MethodsSW1990 cell line was treated with thalidomide at different concentrations (3.125,6.25,12.5,25,50,100,200 and 400 μg/ml) for 24,48,72 h,and then cell proliferation were evaluated by MTT.Cell cycle was determined by flow cytometry,apoptosis was determined by annexin V/PI fluos staining,Bcl-2,Bax protein expression and Bcl-2/Bax ratios were measured by Western Blot in vitro.ResultsThalidomide inhibited the proliferation of SW1990 cells in a time and dosedependant manner.The proportion of G0/G1 phase of SW1990 cells with 200 μg/ml thalidomide treatment increased from (41.15 ± 2.23 ) ％ to (58.83 ± 2.33 ) ％,apoptosis rate increased from 2.6％ to 28.0％,the expression of Bax protein up-regulated from 0.17 ± 0.03 to 0.33 ± 0.04,the expression of Bcl-2 protein downregulated from 0.35 ± 0.02 to 0.17± 0.01,the ration of Bcl-2/Bax decreased from 2.17 ± 0.44 to 0.52 ±0.07.ConclusionsThalidomide can inhibit the proliferation of pancreatic cancer SW1990 cells by upregulating Bax,down-regulating Bcl-2,inducing cell apoptosis and cell Go/G1 phase arrest.

Objective To evaluate the value of ultrasound and CT in the diagnosis of adrenal lesions .Methods A total of 70 pa‐tients of adrenal lesions were examined by ultrasound combined with CT .Pathologically confirmed 55 cases of adrenal tumors and 2 of cysts ,13 of hematoma with follow‐up .The results were analyzed and compared with ultrasound or CT individual inspection .Re‐sults The diagnosis accuracy of adrenal lesions by ultrasound with CT ,only ultrasound and CT ,were 88 .6% ,62 .8% and 72 .9% , 14 pheochromocytoma ,13 myelolipoma ,including 15 adenoma ,5 cortical carcinoma ,2 NHL ,6 metastalic tumor ,2 cysts ,13 hemato‐ma .There was a significant difference between two methods (P<0 .05) .Conclusion The combination of ultrasound and CT could improve accuracy greatly in diagnosis of adrenal lesions .

Objective To investigate the role of platelet-derived growth factor-β receptor (PDGFR-β) in self-renewal of neural stem cells (NSCs).Methods In this study,NSCs of subventricular zone were isolated and cultured from PDGFR-β knockout (PDGFR-β-/-) mice of postnatal day 1 (P1) and P28;the number and diameters of secondary neurospheres were calculated;using 5-bromo-2-deoxyuridine (BrdU) incorporation assay and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assay,cell proliferation and survival rates were analyzed;gene expression profiles were determined by PCR-array analyses;the effect of brain-derived neurotrophic factor (BDNF) on secondary neurospheres formation was examined in these cells.Results In PDGFR-β-/-NSCs,stem cell activities,such as number (/well;P1:25.9±1.3vs117.6±3.6,t=4.236,P＜0.01;P28:13.8± 0.7vs 19.8±0.6,t=2.116,P＜0.01)and diameters (μm;P1:67.7±1.9 vs 69.1 ±2.0,t=3.211,P＜0.01;P28:33.4±0.8vs37.8±0.8,t=2.354,P ＜0.01) of secondary neurospheres,cell proliferation (％;P1:73.3 ± 2.7 vs 88.7 ± 3.6,t =2.773,P ＜ 0.05;P28:28.6 ± 9.6 vs 68.2 ± 4.5,t =6.302,P ＜ 0.05) and survival rates (％;P1:14.5 ±2.1 vs 9.3 ± 1.3,t =7.222,P ＜ 0.05),were significantly lower as compared with age-matched controls.In comparison of the same genotypic NSCs,the decrease of secondary neurosphere formation was more striking in P28 NSCs than in P1 NSCs.PCR Array analyses demonstrated that expressions of fibroblast growth factor2 and BDNF were decreased (-2.04 ± 0.25,t =2.653,P ＜ 0.05;-3.24 ± 0.37,t =1.324,P ＜ 0.05),and Noggin (2.31 ± 0.37,t =2.749,P ＜ 0.05) was increased in P1 PDGFR-β-/-NSCs as compared with P1 controls.Addition of BDNF rescued the number and diameter of secondary neurospheres in P1 PDGFR-β-/-NSCs to similar levels as controls.Conclusions PDGFR-β signaling may play a role in the selfrenewal and proliferation of NSCs.BDNF may be involved in the effects of PDGFR-β signaling in these cells.

OBJECTIVE To explore the role of Tn5281 in high-level gentamicin resistance(HLGR) of Enterococcus faecalis. METHODS Fifty four strains of HLGR E.faecalis were tested for Tn5281 by PCR method.The PCR products were confirmed by dot blot hybridization and sequencing.Filter mating method was used to investigate the conjugative plasmid transfer.Antimicrobial susceptibility test was performed by agar dilution method of CLSI/NCCLS. RESULTS Of 54 HLGR E.faecalis strains,27(50.0%) carried different types of Tn5281,with 6 strains carrying complete type,17 strains carrying truncated type Ⅰ(lacked IS256 in the right flanking extremity) and 4 strains carrying truncated type Ⅱ(lacked IS256 in the left flanking extremity).All types of transposons were loaded on plasmids. Among four HLGR E.faecalis in which Tn5281 was successfully transferred to recipient strains by filter mating method,one carried complete type and three carried truncated type Ⅰ.Tn5281 carrying strains had higher resistance rates to penicillin and ampicillin and lower resistance rates to tetracycline and chloramphenicol compared to the strains not carrying Tn5281.(CONCLUSIONS Tn5281) is commonly carried by HLGR E.faecalis.It may integrate into conjugative plasmids and play an important role in the dissemination of HLGR among E.faecalis.

0.05). ②Therapeutic study: The Mankin's score of OA group was higher than high or low SmCCⅡ group (6.96?1.02), (3.08?0.45), (4.00?0.94) respectively, P 0.05). CONCLUSION: SmCCⅡ can delay the degradation of articular cartilage of OA rats and maybe effective for OA prevention or treatment. The mechanism maybe related to SmCCⅡ reducing the synthesis of MMP-13, MMP-9 and Cath K at transcriptional level.

Objective To establish a quality evaluation method for determination of paris saponinⅠ,Ⅱ,Ⅵ,Ⅶ in paridis rhizhma by quantitative analysis of multi-components with single-marker (QAMS).Methods An HPLC method and a Phenomenex Luna C18 column(4.6 mm×250 mm,5 μm)were used.The mobile phase was acetonitrile-water (48:52) at a flow rate of 1.0 mL·min-1.The detection wavelength was 203 nm and column temperature was 25 ℃.Parissaponin Ⅶ was used as the internal reference substance.The relative correlation factors of parissaponinⅠ,Ⅱ,Ⅵ were calculated by standard curve method and QAMS.Results The QAMS method could be used for determination of four saponin components at the same time without significant difference as compared with the results of standard curve method (RSD<2.0%).Conclusion QAMS method is simple and reproducible,which can provide a reference for quality standard revision for paridis rhizhma.

BACKGROUND: Soluble dispersive mixture of domestic chicken collagen type Ⅱ (SmCC Ⅱ ) has been proven to be safe and effective for rheumatoid arthritis (RA) treatment while there are some similar articular cartilage degradation and autoimmune pathogenesis between osteoarthritis (OA) and RA, so it is worth studying whether SmCC Ⅱ is effective for the precaution or treatment of OA.OBJECTIVE: To observe the prophylactic and therapeutic effects of SmCC Ⅱ on rat OA and analyze the concomitant matrix metalloproteinase (MMPs) and tissue protease changes in osteoarthritic rats.DESIGN: Randomized and controlled observation.SETTING: Department of Clinical Pharmacy, Sixth People's Hospital, Shanghai Jiao Tong University.MATERIALS: Totally 258 rats of clean grade and either gender, aged 6 weeks were involved in this experiment. SmCC Ⅱ (white powder, Batch No.00031004) was provided by Professor Ren Geng-Fu from Shanghai Engineering Institute of Herbal Biomedicine. The 20 mg/L and 80 mg/L solution of SmCC Ⅱ effective component were prepared before use.While 0.25% excipient (mannitol, product of Jiangsu Tianyuan Medical Co., Ltd) solution was prepared by 200 g/L mannitol dissolved in sterile saline solution.METHODS: The study was carried out in the Whole Animal Laboratory and Experimental Center, Sixth People's Hospital,Shanghai Jiao Tong University between March 2003 and February 2006. ①Prophylactic study: Totally 132 rats were randomized into 5 groups: OA group (n =36): treated with sterile saline solution orally by a 16G syringe, 1mL/d; Low- and high-dose SmCC Ⅱ groups (n =24, respectively): treated with 20 mg/L and 80 mg/L SmCC Ⅱ solution orally, 1 mL/d;Excipient group (n =24): treated with 2.5g/L mannitol, 1 mL/d. OA models were surgically induced in these 4 groups by Hilth's method; Normal group (n =24): Rats without operation were treated with sterile saline solution orally, 1 mL/d. All the rats were administrated on the day of modeling. ②Therapeutic study: Totally 126 rats were randomized into 5 groups, grouping, administration and rat number in different groups were the same as those in prophylactic study,respectively, except for the n =30 in OA group. In addition, all the rats were adminstrated for 8 weeks since 6 weeks after operation. The knee joints of right hind limb of all the rats were taken off after 1-week treatment. And sample was cut open along coronal incision for use. ③Morphological study of articular cartilage was conducted by HE staining and Mankin score was calculated to evaluate the severity of arthritis, immunohistochemical studies of matrix metalloproteinase (MMP)-13, MMP-9 and cathepsin K (Cath K) were carried out by ABC method in situ and the percentage of positive-stained chondrocytes were calculated while the mRNA level for MMP-13, MMP-9, Cath K and the tissue inhibitor of metalloproteinase 1 (TIMP1) were determined by semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) method.MAIN OUTCOME MEASURES: ①The morphological changes of articular cartilage in different groups in prophylactic or therapeutic study.②The level of MMP-13, MMP-9, Cath K and their corresponding mRNA levels.RESULTS: All the 258 rats were involved in the final analysis. ①Prophylactic study: Apparent degeneration appeared in the rats of OA group and the mankin score in OA group was higher than that in high- or low- SmCC Ⅱ groups [(6.44±0.81), (2.75±0.85), (2.70±0.81) points respectively, P ＜ 0.05], the mRNA and positive-stained chondrocyte percentage of MMP-13, MMP-9 and Cath K in OA group was higher than that in high- or low-dose SmCC Ⅱ group, respectively (P ＜0.05-0.01) while the TIMP1mRNA level in OA group was not significantly higher than that in high or low SmCC Ⅱ group (P＞ 0.05). There were no significant changes on the level of MMP-13, MMP-9 and Cath K between excipient and OA group (P ＞ 0.05). ②Therapeutic study: The Mankin's score of OA group was higher than high or low SmCC Ⅱ group [(6.96±1.02), (3.08±0.45), (4.00±0.94) respectively, P ＜ 0.05-0.01] while the mRNA and positive-stained chondrocyte percentage of MMP-13, MMP-9 and Cath K in OA group was higher than that in high- or low-dose SmCC Ⅱ group,respectively (P ＜ 0.05-0.01) while the TIMP1mRNA level in OA group was not significantly higher than that in high- or low-dose SmCC Ⅱ group (P ＞ 0.05).CONCLUSION: SmCC Ⅱ can delay the degradation of articular cartilage of OA rats and maybe effective for OA prevention or treatment. The mechanism maybe related to SmCC Ⅱ reducing the synthesis of MMP-13, MMP-9 and Cath K at transcriptional level.

Objective To explore the influences of parent-child attachment security memory activation on college students'general attachment working model. Methods 152 college students were randomly distributed to three groups, among which there were two experimental groups accepting father-child or mother-child memory activation,and one control group accepting non-interpersonal memory activation. Results Mather-child security memory activation significantly increased subjects' scores on others-model of general attachment to females (F= 3.83;P ＜0.05), scores of mather-child security memory activation group were significantly higher than those of fatherchild group ( 7.88 ± 7.24,4.49 ± 7.53; P ＜ 0.05 ) and control group ( 7.88 ± 7.24,4.71 ± 6.83; P ＜ 0.05 ).Father-child security memory activation significantly increased subjects' scores on self-model of general attachment to males (F= 6.35; P ＜ 0.01 ), scores of father-child security memory activation group were significantly higher than that of mather-child group (6.33 ±5.39,2.44 ±6.14; P＜0.01 ) and control group (6.33 ± 5.39,2.59 ±6.10; P ＜ 0.01 ). Conclusion Parent-child attachment security memory activation have major influences on college students' general attachment working model, in which the effect of gender differences provides some inspiration for clinical interferences.

BACKGROUND: Lumbar spondylolisthesis directly reduces contact areas between dislocated vertebral body and subjacent vertebral body, which is an important factor that decides intervertebral stress and lumbar degeneration. The cross section of lumbar is irregular reniform shaped and there is no mathematical formula to calculate changing regularity of intervertebral contact areas of lumbar spondylolisthesis directly.OBJECTIVE: To study changing regularity of intervertebral contact areas during lumbar spondylolisthesis and to analyze its clinical significance. METHODS: Super-surface of L5 vertebra and sub-surface of L4 from 25 cases were taken by a digital camera and computer simulation spondylolisthesis process and every intervertebral contact areas (Sn) were measured by Image-Pro Plus software. The mean value was obtained and converted into percentage area according to Sn%=Sn/S×100%. The change rules of vertebral bodies were observed from 0 to 100% spondylolisthesis. Based on this regularity, a new clinical stage of lumbar spondylolisthesis was proposed and guided for treatment of 56 cases with lumbar spondylolisthesis. RESULTS AND CONCLUSION: During lumbar spondylolisthesis process, Sn% changes like a hyperbola. Sn% lost slowly during spondylolisthesis rate at 0-23% and quickly during 23%-44%, and then it become slowly once again after spondylolisthesis rate at 44%-100%, the inflection points appeared at (23±2)% and (44±2)%. Totally 48 patients were followed up, according to Staufee standard rate, the clinical curative effect reached approximately 90%. It suggests that the intervertebral contact areas present with a non-linear change, which is helpful to judge the stability of lumbar spine and guide the treatment of lumbar spondylolisthesis.

Objective　To study the ultrasound image feature of acute hepatic lesions in different times.Methods　The feature of ultrasonography in 126 cases with acute hepatic lesions were analyzed and divided into two groups according to different fime after injury: group A, 25～60 minutes after injury; group B, 60～120 minutes after injury.Results　There was significant difference in the structure of sonographic classification between two groups. The high echos was obviously higher in group A than that in group B, while the mixed echos was obviously higher in group B than that in group A (P<0.001). Compared each types in group A and in group B,the high achos in group A and the mixed achos in group B were higher than other types in same group (P<0.001).Conclusions　The ultrasonographic feature of acute hepatic lesions would change with time. The high echos occurs in eaily time after injury ,and then changes into the mixed echos.