A simple and sensitive method was developed to screen ?-PL p ro duced strains from soils. 150mg/L K_2Cr_2O_7 was added to th e solid medium for actinomycetes enriching. A basic dye, methylene blue, incorp orated in the agar plate to detect alkali producers, because dye reacted with th e secreted basic polymers by electrostatic interaction with the secreted basic p dymers and formed special zoon. And then dragendorff regent was used to detect alkaloid producers. Four ?-PL producers were obtained by TLC analysis. Meanw hile, phylogenetic analysis of PL6-3 strain, including morphology, physiologica l and biochemical characters and chemotaxomy were performed and phylogenetic tre e was constructed based on the 16S rDNA sequences. And the results indicated th at PL6-3 strain is a member of Kitasatospora.

Adrenergic beta-Antagonists ; Arrhythmias, Cardiac ; Humans

Objective To evaluate the clinical value of interventional chemotherapy and intravesical instillation for preventing postoperative recurrence and metastasis of cancer in urinary bladder.Methods One hundred and eight patients with urinary bladder cancer were divided into group A and group B.Intravesical instillations after surgical operation were performed in group A (n=52) and combined interventional chemotherapy and intravesical instillations after operation were performed in group B (n=56).The patients were followed up for 1 - 3 years.Results In group A,recurrence occurred in 5 cases (9.62%) within one year,and in 23 cases (44.23%) within 3 years after the operations metastasis developed in 21 cases (40.38%),and 18 cases (34.62%) died.In group B,recurrence occurred in 2 cases (3.57%) within one year,and in 11 cases (19.64%) within 3 years after the operation;metastasis developed in 7 cases (12.50%), and 5 cases (8.93%) died.There were statistical significant differences in recurrence,metastasis and mortality between these two groups (P

OBJECTIVETo compare the changes of nucleus pulposus after in vitro culture of rabbit whole intervertebral disc and spinal motion segment.

METHODSTwenty-one New Zealand white rabbits which were randomly divided into organ group with 8 rabbits and segment group with 13 rabbits. Fifty intervertebral discs and 50 spinal motion segments were harvested respectively under aseptic conditions from two groups. These specimens were maintained in organ culture with hyperosmotic media (410 mOsm/kg), then 10 discs of the two groups were observed respectively by HE staining, immunohistochemistry of collagen type III, proteoglycan content and cells viability of nucleus pulposus before culture and at 3, 7, 14, 21 days after culture.

RESULTSHE staining showed the intervertebral disc tissue structure remained intact after culture of 21 days organ group and 14 days segment group,but there was severely degenerated of 21 days segment group. The intensity value of type II collagen immunohistochemical staining in the nucleus pulposus were not changed significantly between 21 days organ group and 14 days segment group (P > 0.05), but the staining of segment group at 21 days became shallower, there was significant difference compared with before each time points and organ group at 21 days (P < 0.05). PAS/AB staining of proteoglycan of nucleus pulposus showed that there were not decrease of tinting strength of two groups within 7 days, but the strength weakened slightly of two groups at 14 days, and the tinting strength became weaker at 21 days segment group, the change is more obvious than the organ group. The intensity value of fluorescence staining of nucleus pulposus cells was not changed significantly within 7 days of two groups (P > 0.05), the intensity value decreased slightly at 21 days organ group and 14 days segment group, but there were no significant difference compared with before time points (P > 0.05) however at 21 days segment group the intensity decreased as cells viability of nucleus pulposus decreased,and there was a significant difference compared with before each time points and organ group at 21 days (P < 0.05).

CONCLUSIONIt is not obviously degenerated of the discs of organ group cultured within 21 days and segment group cultured within 14 days, but there was significant degeneration of the intervertebral disc of segment group after cultured 21 days, so the rabbit spinal motion segment can be used on research about the biomechanics of intervertebral disc as a vitro experimental model within 14 days.

Animals ; Collagen Type II ; analysis ; Female ; Immunohistochemistry ; Intervertebral Disc ; chemistry ; pathology ; Male ; Organ Culture Techniques ; Rabbits

Animals ; Bone Regeneration ; Bone Substitutes ; Computer-Aided Design ; Humans ; Lactic Acid ; chemistry ; Microsurgery ; Neovascularization, Physiologic ; Polyesters ; chemistry ; Polyglycolic Acid ; chemistry ; Starch ; chemistry ; Stem Cells ; cytology ; Tissue Engineering ; methods

In both type 1 and type 2 diabetes mellitus,β-cell mass (BCM) is lost.Various treatments are developed to restore or reconstruct BCM.The development of non-invasive methods to quantify BCM in vivo offers the potential for early detection of β-cell dysfunction prior to the clinical onset of diabetes.PET imaging with radioligands that directly target the pancreatic β-cells appears promising.The ability to determine the BCM has been investigated in several targets and their corresponding radiotracers,including radiolabeled receptor ligands,antibodies,metabolites and reporter genes.Therefore,we summarize the recent progress in radionuclide molecular imaging of pancreatic β-cells.

10.3969/j.issn.2095-4344.2013.24.003

Objective To analyze the differentially expressed genes in esophageal squamons cell carcinoma (ESCC), para-cancerous tissue (PCT) and normal esophagus tissue (NET) using oligomicroarray and to identify the target genes related to the development and progression of esophageal carcinoma. Methods The total RNAs isolated from ESCC, PCT or NET using one step Trizol method were purified and reversely transcribed into cRNAs. The cRNAs were then fluorescence labeled and hybridized with Agilent oligomicroarray (21 074 probes). The fluorescence intensity features were detected by Agilent scanner and quantified by feature extraction software. The selected candidate genes were confirmed by real time real time fluorescent quantitative RT-PCR immunohistochemistry andWestern blotting.Results ① The oligomicroarray demonstrated that there were 38 up-regulated genes and 61 down-regulated genes. ② The real time fluorescent quantitative RT-PCR revealed that five genes (CTHRC1, INHBA, SPP1 ,LUM, HRK)were more differentially expressed in up-regulated genes. Of which, CTHRC1 displayed more disparity.③ Immunohistochemistry examination showed that the higher expression of CTHRC1 (56.5 %, 26/46) was observed in ESCC. There was significantly difference in expression of CTHRC1 between patients with or without lymph node metastasis (P<0.05). ④ CTHRC1 protein was expressed in both TE-13 and Eca-109 cell lines. Conclusion CTHRC1 is probably one of the most significant biomolecules in ESCC.

Objective To observe the effect of topical application with warm and wet carthamus tinctorius alcohol and anisodaminum on phlebitis caused by mannitol injection. Methods 100 patients with fractured bones suffered from phlebitis caused by mannitol injection were randomized into the observation group and the control group with 50 cases in each group. The observation group adopted topical application with warm and wet carthamus tinctorius alcohol and anisodaminum while the control received external application of 50% magnesium sulfate. The dosage was 3 hours per time,2 times a day, one time in the morning and afternoon respectively. The treatment continued till the phlebitis disappeared and the effect at the 24th,48th and 72th post treatment was compared between the two groups. Results The effect at the above mentioned time points in the obsevation group was superior to that of the control group(P＜0.05).Conclusion Topical application with warm and wet carthamus tinctorius alcohol and anisodaminum on phlebitis caused by mannitol injection proved to be safe and had no adverse effect.