The 13 nm gold nanoparticles ( AuNPs ) were synthesized through the reduction of HAuCl4 by sodium citrate and the glutathione was assembled on the AuNPs. Under the experiment conditions, glutathione-modified AuNPs ( GSH-AuNPs ) with negative charge presented a wine red color owing to the electrostatic repulsion between nanoparticals. Upon the addition of neurogenin 3 ( ngn3 ) peptide, the aggregation of GSH-AuNPs was induced by ngn3 peptide under a certain concentration of salt. The color of AuNPs solution changed from red to blue as a function of the ngn3 peptide concentration. Thus, a rapid detection method for ngn3 peptide using GSH-AuNPs as colorimetric probe was established. The optimal experiment conditions were equilibrium time=10 min, pH=6. 0, CNaCl=100 mmol/L. Under the optimum conditions, the assay showed a linear response range of 20-300 μg/L for the peptide with a detection limit being 8 μg/L and exhibited excellent selectivity for ngn3 peptide.

AIM: To optimize the random amplified polymorphic DNA-Polymerase chain reaction(RAPD-PCR) system of Bupleurum chinense DC by comprehensive scoring method. METHODS: The L_(16)(4~5) orthogonal diagram was applied to studying the effects of different concentrations of Taq polymerase,Mg~(2+),dNTPs,primer and DNA on Bupleurum chinense DC.RAPD-PCR results and to get a suitable PCR system. RESULTS: A suitable RAPD reaction system was developed,i.e.1?Taq polymerase reaction buffer,2.5 mmol/L Mg~(2+),1.5 U Taq DNA polymerase,0.15 mmol/L dNTPs,0.4 ?mol/L primer and 25 ng genomic DNA templates in total 25 ?L reaction solution. CONCLUSION: The results show that the comprehensive scoring method could be used successfully to optimize the RAPD-PCR system.

Objective To explore the way to compile a global military medical literature collection and perspectives for its research.Methods The names of military medical research institutions and their trends of development were summa-rized via semantic analysis.The collection of retrieval words for military medical research institutions( then the collection) was constructed based on expert consultation.The names of military medical research institutions were collect-ed with manual screening after retrieval withthe collection.The literature collection of military medical research institu-tions was completed with coordinated retrieved of their papers and other publications.Results According to different needs of information analysis, the literature collection of military medical research institutions could be analyzed in terms of their size, types of development, and academic authority.Conclusion Based onthe collection, the military medical research institutions collected in this article included institutions that used to be neglected during the course of information tracking of military medicine.Three kinds of institutions should be paid more attention to.The institutions were the ones with a large number of papers and citations, the ones whose papers increased or decreased dramatically, as well as the ones whose research directions were the priority fields of Chinese PLA.

Objective To investigate the effect of intrathecal (IT) dexmedetomidine on the expression of cAMP response element-binding protein phosphorylation (p-CREB) in spinal dorsal horn in a rat model of bone cancer pain. Methods Sixty-four adult female Wistar rats weighing 200-240 g were randomly divided into 4 groups (n = 16 each): sham operation group (group S); bone cancer pain group (group BP); normal saline group ( group NS) ; dexmedetomidine group (group D) . Bone cancer pain was induced by injecting Walker 2S6 mammary gland carcinoma cell suspension (2 ×106 cells/ml) 10μl into the medullary cavity of the tibia in BP, NS and D groups. Groups S and BP received no IT injection. Croups NS and D received IT injection of NS 10 μl and dexme detomidine 5 μg/kg respectively 7 days after successful establishment of the model. Ten animals were selected from each group at 1 day before IT administration (T0), immediately before IT administration (T1 ) and at 1, 6, 12 and 24 h after IT administration (T2-5 ) and paw withdrawal threshold (PWT) to mechanical stimuli was measured with von Frey filaments. The other 6 rats in each group were sacrificed at T4 and the spinal cord was removed for determination of p-CREB expression in the spinal dorsal horn.Results PWT was significantly decreased at T1-5 and pCREB expression up-regulated at T4 in BP, NS and D groups compared with group S ( P ＜ 0.05) . Compared with group BP, PWT was significantly decreased at T2-5 and p-CREB expression down-regulated at T4 in group D ( P ＜0.03), while no significant change in PWT and p-CREB expression was found in group NS (P ＞ 0.05) .Conclusion IT dexmedetomidine can reduce the bone cancer pain through inhibiting the phosphorylation of CREB in rat spinal dorsal horn.

Objective To investigate the effect of different doses of dexmedetomidine(Dex)on sevoflurane consumption in patients undergoing laparoscopic oophorocystectomy.Methods Eighty ASA Ⅰ or Ⅱ patients aged 25-50 yr with body mass index 18-25 kg/m2 undergoing laparoscopic oophorocystectomy were randomly divided into 4 groups (n =20): control group (group C),low dose Dex group(group DL),medium dose Dex group(group DM) and high dose Dex group(group DH).Normal saline 20 ml and Dex 0.3,0.6,0.9μg/kg was infused iv over 10 min at 10 min before skin incision in groups C,DL,DM and DH,respectively.End-tidal sevoflurane concentration (ETsev) was recorded before Dex administration(T1 ),skin incision(T2 ),immediately after pneumoperitoneum (T3 ),10 min of pneumoperitoneum(T4 ) and the end of surgery (T5 ).Duration of anesthesia,consumption of sevoflurane,emergence time,extubation time were recorded and restlessness at 10 min after extubation was also recorded.The concentrations of blood glucose and corticosteroid were measured by quickly by glucose analyzer and radio-immunity gefore anethesia induction (T0) and at T3,T4,T5 respectively.Results The consumption of sevoflurane per hour,ETsev at T2-5,concentrations of blood glucose and corticosteroid at T3-5 were decreased gradually in groups C,DL,DM and DH ( P ＜ 0.05).The emergence time and extubation time were shorter and the incidence of restlessness was lower in groups DL,DM and DH than in group C ( P ＜ 0.05 ).Conclusion Dexmedetomidine can reduce the consumption of sevoflurane in a dose-dependent manner in patients undergoing laparoscopic oophorocystectomy.

Objective To explore the effect of minimally invasive clinical pathway in patients after car-diac interventional therapy. Methods One hundred and twenty patients who received cardiac interventional therapy from June 2005 to October 2006 were divided into the control group and the observation group.The control group received routine nursing while the observation group adopted minimally invasive clinical pathway of nursing.The nursing effect in the two groups was compared. Results The mean hospitalized duration, sat-isfaction degree and health knowledge level in the observation group were superior to those of the control group (P ＜ 0.05). Conclusions The adoption of minimally invasive clinical pathway in patients after cardiac inter-ventional therapy could increase working efficiency nd ensure the nusing quality.

Objective To evaluate the role of interleukin-4 receptor (IL-4R) in renal fibrosis following renal ischemia-reperfusion (I/R) injury in mice.Methods Twelve male wild type BALB/C mice and 12 IL-4Rα gene-knockout mice,aged 8-10 weeks,weighing 20-30 g,were used in the study.The mice of either type were divided into 2 groups (n =6 each) using a random number table:sham operation group (group S) and group I/R.In group I/R,renal I/R was induced by occlusion of the right renal artery for 1 h with atraumatic microclips followed by 2 weeks of reperfusion.The right renal artery was only isolated in group S.At 2 weeks of reperfusion,blood samples were taken from the orbital vein for determination of the concentrations of serum blood urea nitrogen (BUN) and creatinine (Cr).The renal tissues were obtained,and the renal fibrosis area was measured by Sirius Red staining.The expression of fibronectin (FN),collagen Ⅰ (COL-Ⅰ) and α-smooth muscle actin (α-SMA) in renal tissues was detected by immunofluorescence.The expression of signal transducer and activator of transcription 6 (STAT6) and phospho-STAT6 in renal tissues was determined by Western blot.The ratio of phoshop-STAT6 to STAT6 was calculated to reflect the phosphorylation of STAT6.Results Compared with group S of wild type mice,the serum BUN and Cr concentrations and renal fibrosis area were significantly increased,the expression of FN,COL-Ⅰ and α-SMA in renal tissues was significantly up-regulated,and the phosphorylation of STAT6 in renal tissues was significantly increased in group I/R of wild type and IL-4Rα KO mice (P＜0.05).Compared with group I/R of wild type mice,the serum BUN and Cr concentrations and renal fibrosis area were significantly decreased,the expression of FN,COL-Ⅰ and α-SMA in renal tissues was significantly down-regulated,and the phosphorylation of STAT6 in renal tissues was significantly decreased in group I/R of IL-4RαKO mice (P＜0.05).Conclusion The mechanism of renal fibrosis following renal I/R injury is partially related to IL-4R,and IL-4R results in renal fibrosis through promoting activation of STAT6 signaling pathway in mice.

The article presents the contents of marketing of medical information services,explores the model of the marketing of medical information services suitable for the Medical Library of Chinese PLA,discusses the meaning of the marketing of medical information services,the status in this field in China and other countries,and the efforts we need to make next.The purpose is to match the information services to the information needs,support the innovation of medical science.

Objective To evaluate the effects of dexmedetomidine on the cellular immune function of the rats with scald.Methods Seventy-two healthy male Sprague-Dawley rats,weighing 200-220 g,aged 120-150 days,were randomly divided into 3 groups (n =24 each):normal control group (group C),scald group (group S) and dexmedetomidine group (group D).Thirty percent of the total body surface was shaved and then exposed to 94 ℃ water for 12 s in S and D groups.The rats were resuscitated according to Parkland formula after scald in S and D groups,and in addition,dexmedetomidine 30 μg/kg was also intraperitoneally injected immediately after scald in D group.Before the model was established (T1) and at 12 and 24 h after scald (T2,3),blood samples from the inferior vena cava were collected for determination of T lymphocyte subsets CD3 +,CD4 + and CD8 +,NK cell,C-reactive protein (CRP),interleukin-6 (IL-6),IL-10 and tumor necrosis factor-alpha (TNF-α) level.CD4+/CD8+ was calculated.Arterial blood samples were collected for blood gas analysis.Results Compared with C,the CD3+,CD4+ and NK cell levels,CD4+/CD8+,pH value,PaCO2 and PaO2 were significantly decreased,and CD8+ levels,IL-6,IL-10,TNF-α,CRP and BE negative value were increased at T2,3 in S and D groups.Compared with group S,the CD3+,CD4+,NK cell and IL-10 levels,CD4+/CD8+,pH value,PaCO2 and PaO2 were significantly increased,and CD8+ levels,IL-6,TNF-α,CRP and BE negative value were decreased at T2,3 in group D.Conclusion Dexmedetomidine can improve the cellular immune function of the rats with scald.

Objective To evaluate the effects of intrathecal TRESK gene recombinant adenovirus on inflammatory responses mediated by chemokine in the spinal cord of rats with neuropathic pain ( NP ) . Methods Thirty?six male Sprague?Dawley rats, weighing 200-250 g, were randomly divided into 6 groups (n=6 each) using a random number table: control group (group C); sham operation group (group S);NP group; TRESK?overexpressed adenovirus group ( group TRESK ); negative adenovirus group ( group Virus); normal saline group ( group NS) . Spinal nerve injury was produced by exposing the sciatic nerve and its branches and ligation and transection of tibial nerve and common fibular nerve in anesthetized rats. In TRESK, Virus and NS groups, pAd∕CMV∕V5?DEST?TRESK 25 μl (109IU∕ml), negative adenovirus 25 μl and normal saline 25 μl were intrathecally injected, respectively. At 1 day before operation ( base?line, T0 ) and 1, 3, 7 and 14 days after operation ( T1-4 ) , the mechanical paw withdrawal threshold ( MWT) and thermal paw withdrawal latency were measured. Six rats in each group were sacrificed after measurement of pain threshold at T3 . The L4,5 segments of the spinal cords were removed for determination of monocyte chemotactic protein?1 ( MCP?1) , MIP?2, tumor necrosis factor?alpha ( TNF?α) , interleukin?1 beta ( IL?1β) and IL?6 mRNA expression by real?time PCR. Results There was no significant difference in thermal paw withdrawal latency at each time point between groups. Compared with C and S groups, MWT at T1-4 in NP and TRESK groups and at T1-3 in Virus and NS groups were significantly decreased, and the expression of MCP?1, MIP?2, TNF?α, IL?1βand IL?6 mRNA was up?regulated in NP, TRESK, Virus and NS groups. Compared with group NP, MWT was significantly increased at T1-4, and the expres?sion of MCP?1, MIP?2, TNF?α, IL?1β and IL?6 mRNA was down?regulated in group TRESK. Conclusion The mechanism by which intrathecal TRESK gene recombinant adenovirus reduces NP is re?lated to inhibition of inflammatory responses mediated by chemokine in the spinal cord of rats.