2.Isolation and identification of curdione in zedoary oil
Quan XIA ; Jinqi LIU ; Daiyin PENG
Chinese Traditional Patent Medicine 1992;0(08):-
AIM:To study the isolation and identification of curdione from Zedoary oil. METHODS: Silica column was adopted to isolate constituents from Zedoary oil;IR,GC/MS and NMR methods were used to identify its structure. RESULTS: Three constituents were isolated from Zedoary oil,including crystal C_1,C_2 and C_3.Crystal C_1 was identified to be curdione and curdione content in Zedoary oil was 11.31%. CONCLUSION: This method is simple and convenient and it can be used to isolate more quantity of curdione for further pharmaceutical study.
3.Effect of furosemide on Cl -/HCO_3~- exchange in IMCD cell in rabbit kidney
Qianming XIA ; Yan QUAN ; Hongyan LI
Medical Journal of Chinese People's Liberation Army 2001;0(10):-
Objective To evaluate the effect of furosemide on Cl -/HCO- 3 exchange of inner medullary collecting duct(IMCD) in rabbit kidney. Methods The effect of furosemide in different concentrations on the changes in Cl -/HCO- 3 exchange in mono-layer of IMCD cell in rabbit kidney was determined by fluorescent probe technique. Results Cl -/HCO- 3 exchange in IMCD cell could be inhibited by 4.3% by 15?mol/L furo semide solution, and 480?mol/L furosemide solution could inhibit the exchange by 97.4%. The Cl -/HCO- 3 exchange rates of the groups, in which the final concentrations of furosemide were equal to or higher than 30?mol/L, were significantly lower than that of the control group(P
4.Research on HPLC Fingerprint of Salt- prepared Cortex Phellodendri
Quan XIA ; Chenchen ZHU ; Suiqing MI
Traditional Chinese Drug Research & Clinical Pharmacology 1993;0(04):-
Objective To establish a HPLC fingerprint analysis method of salt-prepared Cortex Phellodendri. Methods C18 column was used, with gradient elution by the mobile phase consisted of acetonitrile-0.1 % phosphoric acid (contained 0.2 % triethylamine). The detection wavelength was at 230 nm, and the flow rate was at 0.8 mL/min. Results Seventeen characteristic peaks were selected and the fingerprints on HPLC was set up. Conclusion HPLC fingerprint method is reproducible, accurate and stable, and can be used for the quality control of salt-prepared Cortex Phellodendri.
5.The immunoregulatory effect of TLSF_(JM) on the levels of IP3、Ca~(2+) in activated T cells and the expression of Fos Protein
Chinese Journal of Immunology 1986;0(04):-
The immunoregulatory effect of TLSF_(JM) on the levels of IP3,Ca~(2+) in activated T cells andthe expression of Fos protein was investigated by ABC immunohistochemistry technique and Fu-ra-2/AM labelled T cells and anion-exchange chromatography techniques in this paper.The re-sults showed that TLSF_(JM) can the same time,it can strongly inhibit the levels of IP3、Ca~(2+) in ac-tivated T cells.
8.Impact of community healthcare service center in emergency response to natural disaster
Tian XIA ; Hongjun CAO ; Zhaoxi ZHOU ; Yan DAI ; Quan GONG
Chinese Journal of General Practitioners 2008;7(12):839-840
The Medical Healthcare Service Center,located at the Youxian District,Mianyang City of Sichuan Province,successfully rescued the people affected by the Wenchuan earthquake and the Tangjiashan barrier lake with great help from the senior hospitals.We suggest that the community healthcare service center could play an important role in emergency response system.
9.Effect of exogenous H2 S and ATP-sensitive potassium channels on colonic hypermotility in a rat model of chronic stress
Ying LIU ; Xiaojing QUAN ; Hong XIA ; Hesheng LUO
Chinese Journal of Pathophysiology 2015;33(4):725-731
[ ABSTRACT] AIM:To investigate the potential role of exogenous hydrogen sulfide ( H2 S) and ATP-sensitive po-tassium ( KATP ) channels in chronic stress-induced colonic hypermotility.METHODS:Male Wistar rats were divided into water avoidance stress ( WAS) group and sham WAS ( SWAS) group.Organ bath recordings were used to test the contrac-tile activity of colonic strips.The effects of H2 S donor NaHS and pretreatment with glibenclamide on the contractions of co-lonic smooth muscle were studied and the IC50 of NaHS was calculated.The localization and expression of the subunits of KATP channels were determined by the methods of immunohistochemistry and Western blotting.RESULTS:WAS increased contractile activity of colonic strips.NaHS concentration-dependently inhibited the spontaneous contractions of strips from the SWAS and WAS rats.The IC50 of NaHS for longitudinal muscle ( LM) and circular muscle ( CM) of the WAS rats was 0.2033 mmol/L and 0.1438 mmol/L, significantly lower than those of the SWAS rats.Glibenclamide significantly in-creased the IC50 of NaHS for LM and CM from the SWAS and WAS rats.In both SWAS and WAS rat colon, Kir6.1, Kir6.2 and SUR2B were expressed on the plasma membrane of the smooth muscle cells.WAS treatment resulted in up-reg-ulation of the expression of Kir6.1 and SUR2B in the colon devoid of mucosa and submucosa.CONCLUSION: The in-creased expression of Kir 6.1 and SUR2B in colonic smooth muscle cells may be a defensive response to chronic WAS.H2 S donors may have potential clinical effect on treating chronic stress-induced colonic hypermotility.
10.The Identification of Antagonistic Bacteria B-04 against Botrytis cinerea and Improving Biocontrol Effect through Genetic Modification with ?-1,3-glucanase Gene
Gui-Xia LI ; Hui-Quan MA ; Jing LIU ; Jin DONG ;
China Biotechnology 2006;0(04):-
Bacillus cereus B-04 antagonist to Botrytis cinerea were isolated from samples of tomato soil infected by Botrytis cinerea in Zibo, which are identified through a series of morphological and biochemical characteristics and the sequence of 16SrDNA. Aiming at enhancing the inhibitory effect of this strain, a 4.1kb DNA fragment containing ?-1,3-glucanases gene from pUC1940 was inserted into vector pBE2 and pHY300PLK to construct recombination plasmids, PBE2-glu and pHY300PLK-glu, which were transferred into Bacillus cereus B-04, resulting in a new strain named B-04-glu. Restriction enzyme digestion and ?-1,3-glucanases plate culture confirmed that B-04-glu contained a functional ?-1,3-glucanases gene. Compared to the wild strain B-04, B-04-glu had an increased inhibitory effect against Botrytis cinerea on tomato.