Objective To investigate the distribution of camptothecin(CPT),tryptophan synthase(TSB),and tryptophan decarboxylase(TDC) in Camptotheca acuminata seedlings.Methods The CPT content,TSB and TDC activities in different organs of C.acuminata seedlings subjected to different nitrogen forms treatments by sand culture in greenhouse were determined by HPLC.Results The CPT content in the young leaves of C.acuminata seedlings with different N-forms was significantly higher than that in other organs(P

Multifunctional proteglycan, versican, is recently recognized as a gene related to tumor metastasis. Versican may maintain or inhibit cell growth, affect cell adherence and regulate the mutual interaction between cells or cell and matrix. Higher expression of versican always correlates with worse prognosis.

Objective To study on the endoscopic resection of submucosal tumors (SMT) in gastro-intestinal tract with especial regards to the effectiveness and safety, and the value of endoscopic ultrasonogra phy ( EUS) in SMT before endoscopic resection. Methods Endoscopic therapy was performed in 71 patients with gastrointestinal SMT diagnosed by endoscopy, and of them 64 patients (90. 1 % ) were examined by EUS before the procedure. The SMT located in the esophagus 36 cases, stomach 29 cases, duodenum 3 cases and rectum 3 cases. The median tumor diameter was 14. 2 mm ( ranged 6-20 mm). Endoscopic mucosal resection was performed using a two-channel endoscope after submucosal injection of saline solution in 55 cases, then the SMT resected. In 16 patients, the SMT was resected completely with one-step standard procedure using cap-fitted endoscope ( 10 cases, the SMT less than 10 mm in diameter) or two-channel endoscope (6 cases). Results Sixty-eight of seventy-one solid SMT were removed completely under endoscopy and 2 SMT (one ectopic pancreas and one gastric leiomyoma) were resected incompletely; the findings were showed at 4th week by repeated endoscopy. One patient with rectal leiomyoma required surgical resection after unsuccessful endoscopic resection. The follow up period was 18. 7 months on average, no recurrences were found in 67 cases. Histological results showed 51 (71. 8% ) leiomyomas, one granular cell tumor, 4 fibromas, 3 ectopic pancreas, 3 lipomas, 2 stromal tumors and 2 carcinoids in the SMT. Five tumors of mesenchymal tissue , their histological origin cannot be firmly defined due to lack of immunoassayed specimen. Bleeding occurred in only 9 of 71 cases and was easily managed with endoscopic haemostatic measures. One patient with stromal tumor suffered from gastric perforation after the procedure. Conclusions Endoscopic resection of gastrointestinal SMT is a safe and effective procedure and obtains the histological diagnosis simultaneously. EUS is helpful in selecting indicated cases for endoscopic resection.

ObjectiveTo investigate the clinical efficacy of moxibustion plus medicinal tea in treating gouty arthritis during the interictal period.MethodA treatment group of 64 patients received moxibustion plus medicinal tea and the control groupof 64 patients, alimentary control.ResultThe total efficacy rate was 95.3% in the treatment group and 75.0% in the control group; there was a statistically significant difference between the two groups (P<0.01).ConclusionMoxibustion plus medicinal tea has a better therapeutic effect on gouty arthritis during the interictal period.

Objective To analyze the distribution of class 1,2 and 3 integrons and their gene cassettes,and to explore its relationship with drug resistance in Shigella.Methods Antimicrobial susceptibility was detected by minimal inhibitory concentration (MIC) method.All the genes of integrons and gene cassettes were amplified by polymerase chain reaction (PCR).The amplicons were identified by amplified fragment length polymorphism (AFLP) and sequencing.Results Fifty seven multi-drug resistant strains were identified from a total of 62 Shigella strains (91.9％).Among multi drug resistant strains,52 strains carried integrons of class 1 (91.2 ％) and 55 strains carried integrons of class 2 (96.5％).Only 2 strains carried class 1 integrons alone,5 strains carried class 2 integrons alone and 50 strains had both class 1 and class 2 integrons.Class 3 integrons were not detected.The gene cassettes of typical class 1 integrons,dfrV and dfrA17-aadA5,were detected in 6 strains and 2 strains,respectively.Atypical class 1 integrons with gene cassettes blaOxA30 aadA1 were detected in 44 strains.The typical and atypical class 1 integrons coexisted in 6 Shigella flexneri strains.Gene cassettes for class 2 integrons were dfrA1 sat1-aadA1.Conclusions The multi-drug resistant Shigella strains are widely distributed in Ji'nan,and the atypical class 1 integrons and class 2 integrons are common in these strains.Coexistence of the two integrons is observed in some of the strains.

Objective To perform a nationwide external quality assessment for detection of Chlamydia trachomatis, and to improve the performance of laboratories in the detection of Chlamydia trachomatis. Methods Totally, 419 quality control samples were sent to tested laboratories, including 76 samples in 2007, 168 samples in 2008 and 175 samples in 2009. The laboratories were required to test the samples and report test results, within stipulated time, to the reference laboratory in National Center for Sexually Transmitted Disease (STD) Control, Chinese Center for Disease Control and Prevention. The reported results were statistically analyzed by the National Center for STD Control, who finally fed back the statistical results to all of the participants. Results The percentage increased from 84.93% in 2007 to 92.14% in 2009 for laboratories showing an 80% or more consistency with the reference laboratory in the detection of Chlamydia trachomatis from quality control samples (qualified), from 47.95% in 2007 to 70% in 2009 for those showing a 100% consistency (excellent), and dereased from 5.48% in 2007 to 0.71% in 2009 for those showing a consistency of lower than 60% (unqualified). The centralabs of provincial CDC and volunteer laboratories exhibited a satisfactory performance for the detection of Chlamydia trachomatis, while the performance of a small number of national STD surveillance sites needed to be increase. Conclusion The external quality assessment reveals a continuous improvement in the capability of detecting Chlamydia trachomatis in STD laboratories at different levels in China.

OBJECTIVE To explore the effect of vacuum packaging technique for storing sterilized packs in order to extend the period of valid storing.METHODS From 420 sterilized packages 210 were randomly taken as a test group,and the other 210 packages as the control group.According to aseptic techniques the packages of test group were vacuumized and the control group was packed as by outine protocol.Two groups were simultaneously stored in aseptic closet,and then regularly taken out 30 samples from two groups respectively for microbial(culturing).RESULTS Bacterial growth was seen in the control group at first month.But none of the specimens in test group showed any microbial growth until the eighth month.There was a statistically significant difference((P

Objective To establish a rabbit model of radiation-induced skeletal muscle injury in order to study the ultrastructural pathological changes and underlying mechanism.Methods 28 New Zealand rabbits were randomly divided into 2 groups with 16 rabbits in experimental group and 12 rabbits in control group.The experimental rabbits were irradiated on hip with a single dose of 80 Gy of 9 MeV electrons from a linear accelerator.1 month and 6 months after irradiation the pathological changes were respectively observed under light microscope and electron microscope.Results One month after irradiation,the morphologic changes including degeneration,necrosis of muscle cells,and hemorrhage between the muscle cells were observed under light microscope and the swelling of myofibrillae,blurring of light and shade band,vacuolar degeneration of mitochondria and amorphous areas of necrosis were observed under electron microscope.Six months after irradiation,the morphologic changes of nucleolus chips,fibrous connective tissue,thickening of vascular wall and vascular congestion between the muscle cells and the amorphous areas of necrosis in the experimental group were much more serious than those of 1 month after irradiation.In addition,the myofilaments were lost in degeneration areas and the sarcomere became shorten.Observation with electron microscope showed that the mitochondrial size and its morphological changes were varied and the amounts of collagen between myofibrillaes were increased 6 months after irradiation.Conclusions A rabbit model of high-dose irradiated skeleton muscle injury was successfully established with a single dose of 80 Gy of 9 MeV electrons from a linear accelerator.The degeneration and necrosis of muscle cells may be promoted by mitochondrial and vascular injury,degeneration of vessel and nerve fiber.

Objective:To investigate the effects of Rad50-targeted inhibition on the radiosensitivity of head and neck squamous cell carcinoma cells.Methods:Rad50 in Tca8113 and OSCC-15 cells was down-regulated by siRNA.Then the cells were treated by a small dose of radiation(2 Gy),Western blot was used to detect the expression of Rad50 protein.Comet assay was used to evaluate the DNA double strand breaks(DSBs).Colony survival assay was performed to detect the survival rate of the cells.Telomere FISH was performed to assess the telomere length in the cells.Results:Target siRNA inhibited Rad50 protein expression in Tca8113 and OSCC-15 cells. siRNA combined with the radiation of 2 Gy produced more DSBs,decreased the proliferation and shortened the nucleus telomere length of the cells more than radiation treatment alone.Conclusion:The targeted inhibition of Rad50 may increase the radiosensitivity of Tca8113 and OSCC-15 cells.

Objective To investigate the prevalence of metabolic syndrome (MS) among adults in rural areas of Ningxia Hui autonomous region.Methods A cross-sectional study was conducted in 10 639 adults enrolled with a multistage method from Jingyuan County.The MS was identified according to Chinese type 2 diabetes prevention guide (2013).Results Among all the subjects, 17.4% of them met the MS definition with the standardized prevalence of 14.7% after adjustment of sex and age.The prevalence and standardized rate of MS in men were 19.9% and 17.3%, and in women were 15.3% and 13.5%.The prevalence of MS in men was higher than that in women(P<0.001) and increased with aging in both genders.The prevalence and standardized rate of abdominal obesity,hyperglycemia,hypertension,high triglycerides,and low HDL-C were 19.5% and 16.7%, 15.0% and 12.9%, 42.0% and 37.1%, 25.8% and 23.1%, 28.5% and 27.7%,respectively.The rate of abdominal obesity was higher in women than in men (20.5% vs 18.2%, P=0.004), whereas the rate of hypertension, high triglycerides, and low HDL-C were higher in men than in women (all P<0.01).The prevalence of having one parameter of the MS was 68.4%.Conclusion The prevalence of MS is higher in rural areas of Ningxia Hui autonomous region, suggesting that a series of comprehensive prevention measures should be carried out to prevent and control the MS so as to improve the public health conditions in rural areas.