ABSTRACT
Objective To investigate the mechanism of nuclear factor-kappa B(NF-κB)in thioactamide(TAA)induced acute hepatic injury.Methods Seventy-eight Wistar rats were randomly divided into normal group(n=18),TAA model group(n=30)and pyrrolidine dithiocarbamate (PDTC)pretreated group(n=30).The rats in PDTC group were received 100 rag/kg of PDTC 1 h before induction of the model.Every 10 rats in TAA group and PDTC pretreated group and 6 rats in normal group were sacrificed at 6,24,48 hour after induction of the model tO mesure levels of endotoxin,tumor necrosis factor(TNF)-α and interleukin(IL)-6.The expression of the intercellular adhesion molecular(ICAM)-1 in hepatic tissue was tested using RT-PCR and the NF-κB activity was 48 hour were higher in TAA group[(87.11±8.23)%.(78.55±6.82)%and(74.27±6.26)%,respectively]than those in normal group[(4.64±1.82)%,(4.55±1.67)%and(4.91±2.12)%,all comparison with normal group(P＜0.01).The serum concentration of endotoxin and TNF-α in PDTC pretreated group were higher than those in normal group(P＜0.0 1).but lower than those in TAA with ticrmal group(P＜0.01).The serum concentration of IL-6 in PDTC pretreated group was higher at 24 and 48 hour than those in normal group(P＜0.01),but lower than thoes in TAA group(P＜group(P＜0.01).The expression of ICAM-1 in PDTC pretreated group was higher than that in immunohistochemical examination showed that liver necrosis was folund in TAA group and PDTC pretreated group.Conclusion The Nuclear factor-κB may aggravate the injury of liver by promoting expressions of TNF-α,IL-6 and ICAM-1.
ABSTRACT
The gentamicin sulfate carried calcium sulfate (GSCS) implants were fabricated by the coagulating method, and the release rate of the gentamicin tested by UV-spectrometer and the absorbing rate of the calcium sulfate carrier in vitro were studied. The release patterns of two types of GSCS were compared. The trend of daily weight loss of GSCS was found being similar to that of pure calcium sulfate, which suggested that the gentamicin part has little effect on the absorbing pattern of calcium sulfate. The release rate of gentamicin is controlled by the erosion rate of calcium sulfate, so GSCS with different amount of gentamicin has the same release patterns. The DRP value of ED is higher than that of CO during the early stage, while the DRP value of ED is lower than that of CO during the late stage. The GSCS samples were implanted into the defect mold on the radii of the rabbits to investigate the potential for the use of GSCS implants as bone fillers, and the results revealed that new bone had been induced in a great part of the defect at 14 weeks after operation.
Subject(s)
Animals , Rabbits , Anti-Bacterial Agents , Pharmacokinetics , Bone Regeneration , Calcium Sulfate , Gentamicins , Pharmacokinetics , Implants, Experimental , Radius Fractures , TherapeuticsABSTRACT
OBJECTIVE To improve capability of nosocomial infection(NI) prevention and control in reusable textiles management.METHODS In an investigation to previous reused textiles handled procedure,care to keep from creation of potential infectious aerosols should not be taken in contaminated textiles collection,transportation of clean and soiled textile was done in undistinguished uncovered vehicles,sorting room shared a common space with dressing room and washing room,and personal protection was not performed in handling contaminated textiles.RESULTS A series of NI management as follows effectively were adopted in hospital laundry.Appropriate bags were adopted for collecting used textiles or fabrics at the point of generation and subsequently closed securely for transportation of them to the laundry.An independent sorting area with exclusive ventilation system was separated from other parts of the laundry.Hand hygiene facilities and products and appropriate personal protective equipments were available.Transportation and storage of clean from soiled textiles were separated.CONCLUSIONS Appropriate handling and processing textiles in infectious disease hospital plays key role in NI management.
ABSTRACT
Objective To establish a method to determine the concentration of Danshensu in rats sera by HPLC after rats were fed with Kangxianerhao(KXEH) extract.Metheds Rats were given 0.45g or 0.55g KXEH extract 7 times in 4 days by gavage,and blood were collected from heart of rats at different time.Condition of HPLC: C18A column was used,the mobile phase was consist of a mixture of acetonitrile-H_3PO_4,the detection wavelength was 205nm.Result Concentration of KXEH reached the highest level one hour after administration of KXEH in different doses,which showed that high dose of drug got higher concentration of drug Danshensu in serum than the medium dose.Linear correlation was obtained over the concentration of 76～1520mg/L,r=0.9932.Average recoveries of samples were 98.3%,101.5%,99.3% respectively at different dose of 76mg/L、304mg/Land 1520mg/L,with RSD was 5.9%、2.5%、2.0% respectively.It was proved indirectly that the concentration of KXEH in rat serum after administraion of KXEH extract reached effective concentration in blood.Conclusion It shows that large dose KXEH get higher concentration of Danshensu in blood than the medium dose.The concentration of drug serum is quantitated by HPLC assay.