Objective To evaluate the efficacy and safety of CT-guided percutaneous celiac plexus block (NCPB) using 25 G controllable curved needle together with 22 G straight needle in treating refractory carcinomatous upper abdominal pain. Methods A total of 18 patients with advanced refractory carcinomatous upper abdominal pain were enrolled in this study. The carcinomatous upper abdominal pain failed to the three-step analgesic therapy. Guided by CT scan, percutaneous injection of ethanol with a 25 G controllable curved needle to destroy celiac plexus was carried out in all patients. According to WHO pain relief standards, the relieving degree of pain was evaluated before NCPB and 2 weeks, one, 2, 3 and 6 months after NCPB. The results were analyzed. Results The technical success rate was 100%. The short-term (within 2 weeks) efficacy rate was 88.8%and the complete remission rate was 38.8%. The long-term (over 3 months) efficacy rate was 50% and the complete remission rate was 20%. No severe complications occurred. Conclusion For refractory carcinomatous upper abdominal pain, CT-guided percutaneous celiac plexus block is a simple, safe and effective treatment.

To produce high-affinity monoclonal antibodies against pesticide imidacloprid, we synthesized the haptens 1-[(6-Carboxylethylthio-3-pyridinyl) methyl] -N-nitro-imidazolidinimine (named as H1) and 1-[(6-Chloro-3-pyridinyl) methyl]-3-carboxylpropyl-N-nitro-2-imidazolidinimine (termed as H2). And then the haptens were coupled to bovine serum albumin (BSA) and ovalbumin (OVA) for immunogen (H1-BSA) and coating antigen (H2-OVA) respectively by NHS ester method. BALB/c mice were immunized with H1-BSA conjugate. We obtained two hybridoma cell lines 2F11/A9 and 2G6/G12 secreting antibody specific for imidacloprid from the conventional hybridoma technology. The result showed that the subtypes of obtained monoclonal antibodies were IgG3 and IgG1, respectively, and the titers of ascites were up to 1:128 000. The indirect competitive ELISA indicated the IC50 values of 5.3 and 28.3 ng/mL with detection limits of 1.1 ng/mL and 7.7 ng/mL, respectively. Two monoclonal antibodies had no apparent cross reactivity with six analogous compounds. Thus, two prepared monoclonal antibodies had a very high affinity and specificity, and it could be used to develop ELISA for rapid determination of imidacloprid residue and laid a solid foundation for research and development of products for immunoassay.
Animals ; Antibodies, Monoclonal ; biosynthesis ; Antibody Specificity ; Hybridomas ; metabolism ; Imidazoles ; immunology ; Insecticides ; immunology ; Mice ; Mice, Inbred BALB C ; Neonicotinoids ; Nitro Compounds ; immunology

OBJECTIVE To clarify whether the thera-peutic effect of escitalopram on depression patients is cor-related with traditional Chinese medicine syndrome types,and to provide a basis for more accurate drug applica-tion.METHODS A total of 235 depression patients were recruited and classified according to traditional Chinese medicine syndrome differentiation into 5 types:liver and qi stagnation(45),liver stagnation and fire transformation(43),liver qi stagnation and spleen deficiency(79),heart and spleen deficiency(20),and liver and kidney deficiency(38).All patients were treated with escitalopram(10 mg·d-1)for eight weeks.The Montgomery Depression Rating Scale(MADRS)and the 17 Hamilton Depression Rating Scale(HAMD-17)were used to score before treatment and 2,4,and 8 weeks after treatment,respectively.RESULTS Compared with before treatment,the MADRS and HAMD-17 scores and remission rates of each syn-drome type significantly improved with increasing medica-tion duration.The MADRS score relief rate of liver and kidney deficiency type was the most significant(69.3%),significantly higher than the other four syndrome types(47.5%-52.6%,P<0.05);The remission rate of HAMD-17 score was significantly higher than that of heart and spleen deficiency(50.7%vs.28.5%,P＜0.05).The remis-sion rate of HAMD-17 score in liver and qi stagnation type(52.2%)was significantly higher than that in liver stagnation and spleen deficiency type(37.0%,P＜0.01)and heart spleen deficiency type(28.5%,P＜0.05).CON-CLUSION Escitalopram may have a more significant therapeutic effect on patients with liver and kidney defi-ciency and liver stagnation depression.This study pro-vides a new approach for the more effective and accu-rate application of traditional Chinese medicine syndrome differentiation in the selection of clinical antidepressants.

Objective: To investigate the antibacterial property and biological activity of Ti dental implant with antimicrobial peptide Pac-525 coatings, and to study the effect of peptide Pac-525 coatings on Porphyromonas gingivalis's antibacterial performance and osteoblast proliferation and adhesion. Methods: After ultrasonic micro arc oxidation, alkali treatment and silane treatment, forty-five pure titanium specimens were exposed to antibacterial peptide Pac-525 in different concentration (0.25, 0.50, 0.75 g/L). The titanium specimens in the control group were only treated with ultrasonic micro arc oxidation, alkali treatment and silane treatment. The morphologies of coatings were observed by scanning electron microscope (SEM), and the element changes were detected by energy spectrum analyzer. Orange acridine-ethidium bromide double staining was used to detect the average percentage of live bacteria and biofilm thickness, after the specimens in each group and Porphyromonas gingivalis were co-cultured for 72 hours. Cell counting Kit-8 method and immunofluorescence staining were used to test the proliferation of osteoblasts, the number and growth morphologies of adherent cells, respectively. Results: SEM and energy spectrum analysis showed that the Pac-525 particles loaded on the surface of the coating, and the C and N elements in the Pac-525 coating group were significantly more than those in the control group. The average percentage of living bacteria in the control group, 0.25, 0.50 and 0.75 g/L antimicrobial peptides were 0.58%, 0.45%, 0.34% and 0.28%, respectively, and the difference between each group was statistically significant (P<0.05). The biofilm thickness of Porphyromonas gingivalis in 0.50 and 0.75 g/L antibacterial peptide group were (98.3±1.2) and (94.5±2.5) μm respectively, which were significantly less than those in control group and 0.25 g/L antibacterial peptide group [(117.6±1.5) and (118.0±1.3) μm] (P<0.05), respectively. The number of bone cell adhesion and proliferation of all antimicrobial peptides were significantly greater than those in the control group (P<0.05), and the cells stretched better. Conclusions The antibacterial peptide coating of titanium implants could inhibit the formation of bacterial biofilm. It had good antibacterial properties and could promote the adhesion and proliferation of osteoblasts.