Objective To study the diagnosis and treatment of duodenal papilla tumor (DPT). Methods Analyses were made on the clinical data of 22 patients with DPT proved by operation and pathology from 1977 to 1999. Results There were 17 patients with duodenal papillary carcinoma, 5 with duodenal papilloma in this series. Discomfort of the upper abdomen (16 cases) and jaundice (22 cases) were the main symptoms. Barium meal examination, BUS, CT and ERCP were very useful in the diagnosis of DPT. In this series, 19 of 22 patients received pancreaticoduodenctomy, and 3 received local reseciton, the resection rate was 100%. 15 patients (88.2%) were followed up, the 5 years survival rate was 73.3%, 7 years survival rate was 46.7%. Conclusions Duodenoscope and ERCP are credible methods for diagnosis of this disease, resection is the main way of treatment.

Objective To investigate the role of mitochondrial KATP (mito-KATP) channel in reduction of renal ischemia-repeerfusion (I/R) injury by ischemic postconditioning (IPo) in rats. Methods Thirty-five adult male SD rats weighing 250-280 g were randomly divided into 5 groups ( n = 7 each): group Ⅰ sham operation (group S); group Ⅱ I/R; group Ⅲ IPo; group Ⅳ 5-HD + I/R and group V 5-HD + IPo. The rats were anesthetized with intraperitoneal (IP) chloral hydrate 300 mg/kg. Bilateral kidneys were exposed and their pedicles were occluded for 45 min with atraumatic mini-clamp followed by 6 h reperfusion in group Ⅱ - Ⅴ . In group Ⅲ and Ⅴ 3 cycles of 10 s reperfusion followed by 10 s ischemia were applied immediately after 45 min kidney ischemia. In group Ⅳ and Ⅴ 5-HD (a specific blocker of the mito-KATP channel) 10 mg/kg was given IP at 30 min before ischemia. Blood samples were obtained at 6 h of reperfusion for determination of serum creatinine (Cr) and urea nitrogen (BUN) concentrations. The animals were then killed. Bilateral kidneys were removed for determination of mitochondrial membrane potential in the renal tubular epidural cell and intracellular reactive oxygen species (ROS)content and free Ca2+ concentrations. Results Renal I/R significantly increased serum Cr and BUN concentrations and intracellular free Ca2+ concentration and ROC content and decreased mitochondrial membrane potential as compared with sham operation group. IPo significantly attenuated the I/R-induced changes mentioned above. The protective effects of IPo against renal I/R injury was reversed by 5-HD. Conclusion Mito-KATP channel is involved in reduction of I/R-induced renal injury by ischemic postconditioning.

Objective To explore the feasibility of using the quantitative reference extract of ginkgo leaf total lactones instead of single component reference for the quantitative assay of Ginkgo Folium.Methods HPLC-ELSD method was performed by using a Diamonsil C18 column (250 mm×4.6 mm,5 μm) with methanol-water as the mobile phase at the gradient elution mode.Flow rate was 1.0 mL·min-1.The parameters of ELSD detector were as follows,the drifit tube temperature was 105 ℃,and the flow rate of nitrogen(N2) was 3 L·min-1.Results The linear ranges of ginkgolide A,ginkgolide B,ginkgolide C,and bilobalide were 0.735-5.879 μg (r=0.999 6),0.404-6.060 μg (r=0.999 6),0.296-4.439 μg (r=0.999 6),and 1.001-6.006 μg (r=0.999 7),respectively.The recoveries and RSD of the four components were 95.6% (4.0%),97.3% (4.5%),99.3% (5.0%),and 100.4% (2.1%),respectively.Conclusion The quantitative reference extract of ginkgo leaf total lactones can be used as the substitute for the determination of terpene lactones.

The antitumor activities of NL-101,aHDACi/DNA damage dual-targeting drug,on human multiple myeloma in vitro and in vivo were studied.Furthermore,the primary mechanisms were revealed.We detected the anti-proliferative activity of NL-101 on 10 human multiple myeloma cell lines,and the combinational effect of NL-101 and bortezomib on RPMI 8226 cell line.The inducing effects of NL-101 on cell cycle arrest and apoptosis were detected by FACS.The effects of NL-101 on acetyled-Histone H3,total Histone H3,acetyled α-Tubulin,total α-Tubulin,phospho-Histone H2A.X and total Histone H2A.X were evaluated by Western blott.We also demonstrated the antitumor activity of NL-101 and the combinational effect of NL-101 and bortezomib on RPMI 8226 xenograft tumor model in vivo.Results showed that NL-101 possessed strong antitumor activities on human multiple myeloma cells in vitro and in vivo.NL-101exhibited significant HDAC inhibitory activity and DNA alkylating activity.NL-101not only inhibited histone deacetylation level,but also increased the DNA damage in multiple myeloma cells.Meanwhile,NL-101 induced cell cycle arrest and apoptosis.Also,the synergistic effect of NL-101 was discovered when combined with bortezomib in vitro and in vivo.These data demonstrated that NL-101 may be a potent agent for the treatment of human multiple myeloma in future.

ObjectiveThe aim of this study was to evaluate the measurement of plasma D-dimer level in the diagnosis of acute and chronic deep venous thrombosis(DVT) of the lower limbs. Methods Gold colloids immunofiltration assay(GIA) was used to detect D-dimer in the plasma in 121 patients with DVT of the lower limbs confirmed by continuous wave Dopper ultrasound and B-mode ultrasound (normal value

Objective To establish the characteristic spectrum of ginkgo leaf tablets,ginkgo leaf capsules,and ginkgo leaf dropping pills.Methods HPLC-ELSD analysis was performed on an Agilent Poroshell 120 EC-C18 column(150 mm×4.6 mm,2.7 μm)with the methanol-0.1% formic acid as mobile phase at the gradient elution mode,flow rate was 0.8 mL·min-1.Results Referring to the reference extract,a total of 12 peaks were established in the characteristic spectrum and selected as the characteristic common peaks.Conclusion The established method was simple and sensitive with good reproducibility,so it could be used to control the quality of ginkgo leaf preparations.

Objective To control the quality of the species in Dioscorea L. better. Methods An HPLC-ELSD method was developed for the first time to simultaneously determine four bioactive ingredients:dioscin gracillin,protoneodioscin, and protoneogracillin in 31 samples belonging to seven species of Dioscorea L. from different areas. The column was an Inertsil HILIC (250mmx4.6 mm,5pm). The separation was carried out with a gradient program. The mobile phase was acetonitrile-water at a flow rate of 0.8 mL/min. Results The standard curve was rectilinear in the range of 0.464-12.97 gg (r=0.9969) for dioscin, 0.310-7.09 ltg (r = 0.9953) for gracillin, 0.469-11.66 gg (r=0.9970) for protoneodioscin, and 0.276-6.87 gg (r＝0.9992) for protoneogracillin. The recoveries of the markers were 98.1%, 100.1%, 97.2%, and 96.4%, respectively. The contents of the four components were quite different among the seven species of Dioscorea L. Conclusion The proposed HPLC-ELSD method is convenient,fast, accurate, and applicable for simultaneous analysis of multiple bioactive components of species in Dioscorea L.for quality control, which could facilitate discovering new natural resources of steroidal saponin.

Objective To establish a RP-HPLC fingerprinting analysis method for quality evaluation and control of the four variants of Chrysanthemi Morifoli Flos. Methods RP-HPLC was used to establish the fingerprinting method.Results Despite of the similarity in terms of holistic HPLC chromatograms, the four variants of Chrysanthemi Morifoli Flos exhibit characteristic fingerprints and can be readily recognized by similarity clusters. Conclusion A simple and reliable HPLC fingerprinting method has been developed and validated to authenticate the four variants of Chrysanthemi Morifoli Flos, providing a scientific basis for quality control of Chrysanthemi Morifoli Flos.

Objective To assess the reliability and useness of using a coupling device for end-to-end venous anastomosis in patients undergoing free-tissue transfer in head and neck reconstruction.Methods Twelve patients undergoing surgical resection and head and neck defects were repaired with fibular flap,anterolateral thigh flap and radial forearm flap.The microvascular anastomotic device was used to perform venous anastomosis in these cases.Flap survival and thrombosis of the venous anastomoses were determined.Results There were no flap losses due to venous thrombosis in this series.The venous anastomosis was usually coupled in about 5.3 minutes and appear as an obviously time savings compared with performing a hand-sewn venous anastomosis.Conclusion The microvascular coupler is excellent in end-to-end venous anastomosis and certainly less taxing on the surgeon when compared with standard suture techniques.