Maximum Allowable Concentration ; Mineral Fibers ; analysis ; Occupational Exposure ; analysis

By establishing experimental modal of laryngeal allograft,the short-term histopathological changes of liver and kidney in Cyclosporine A (CsA)-treated rats receiving laryn- geal allograft were observed.The animals were divided into 3 groups.Group 1 was given CsA 15 mg?kg~(-1)/d by daily intraperitoneal injection for 2 weeks,Group 2 received CsA 25 mg?kg~(-1)/d, and the third group without CsA treatment served as control.All of recipients were sacrificed 14 days after transplantation.Histological examination showed that CsA nephrotoxicity was charac- terized by abundant vacuolation of the proximal tubular epithelium cells,hyaline regeneration of arterioles with thickening of vascular wall,and striped interstitial fibrosis and its hepatotoxicity by fatty degeneration with mild hyperplasia of Kupffer's cells and focal necrosis of hepatocytes. Histopathological changes of CsA-induced hepato- and nephrotoxicity of the recipients were closely correlated to the dosage of CsA received.

Asbestos ; adverse effects ; chemistry ; classification ; Carcinogens ; Fibrosis ; Humans ; Occupational Exposure

Homocysteine ; pharmacology ; Human Umbilical Vein Endothelial Cells ; drug effects ; metabolism ; Humans ; Lipid Peroxidation ; drug effects ; Metallothionein ; pharmacology

Cysts ; complications ; Exophthalmos ; complications ; Frontal Sinus ; pathology ; Humans ; Male ; Middle Aged ; Paranasal Sinus Diseases ; complications

Objective To study the value of leptin,adiponeetin and interleukin (IL-1,IL-6,IL-8) in diagnosis,treatment,and prognosis of cerebral infarction.Method The levels of serum leptin ,adiponectin and IL-1,IL-6,IL-8 in acute cerebral infarction before and after treatment were determined with ELISA as well as in the healthy controls.The relationship between these indices and nerve function injury was studied.Results The levels of serum leptin and IL-1,IL-6,IL-8 in the patients increased significantly,but the controls didn't (P

Objective To establish a RP-HPLC method for determining the concentration of prulifloxacin active metabolite in human plasma and urine.Methods The supernatant obtained by centrifugation after the sample was precipitated with methanol- acetonitrile (1:1) was chromatographically separated on a Diamonsil C_(18)(250 mm?4.6 mm,5?m) using a mobile phase con- sisting of acetonitrile and 0.05 mol/L potassium dihydrogen phosphate (pH2.2) containing 1% tetrabutylammonium bromide. The solutions of 20:80 (V/V) and 12:88 (V/V) at a flow rate of 1.0 mL/min and 1.6 mL/min were used for plasma and u- rine, respectively.Then the samples were assayed at wavelength of Ex 280 nm and Em 425 nm.Results The linear range for prulifloxacin active metabolite in plasma and urine were 0.005-5 mg/L (r=0.9999) and 0.05-5 mg/L(r=0.9999)with a low- er limit of quantitation of 0.002 mg/L and 0.01 rag/L, respectively.In plasma, the relative recovery ranged from 100.64% to 101.00% at the concentration of 5.00, 0.50 and 0.05 mg/L and within-day and between-day precisions were less than 2.5% and 4.6% respectively.Meanwhile, the relative recovery ranged from 97.20% to 100.20% at the concentration of 2.50, 0.50 and 0.10 mg/L in urine.The within-day and between-day precisions were lower than 1.3% and 4.3%, respectively.The method had been successfully used for the pharmacokinetic studies of a prulifloxacin formulation after oral administration to healthy volunteers.Conclusions The present method is simple, rapid, accurate, reproducible and suitable for the pharmacoki- netic study of prulifloxacin in humans.

Objective To investigate the effects of ursodeoxycholic acid (UDCA), dexamethasone (DEX), and S adenomethionine (SAMe) on the pregnant rats with intrahepatic cholestasis induced by ethinylestradiol (EE). Methods A total of 50 15 day pregnant Wistar rats were randomly divided into five groups: control group, EE group, UDCA group, DEX group, and SAMe group. In EE group, rats were subcutaneously injected with EE (2.5 mg?kg -1 ?d -1 ) for 5 d. In the control group, rats received subcutaneous injection of appropriate volume of propylene glycol (PG) for 5 d. In UDCA, SAMe, and DEX groups, rats were administered with the same dose of EE plus UDCA (100 mg?kg -1 ?d -1 ), SAMe (100 mg?kg -1 ?d -1 ), and DEX (1 mg?kg -1 ?d -1 ) for 5 d, respectively. The serum levels of aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatases (ALP), glycocholic acid (GC), and total bilirubin were measured after cesarean. Morphologic changes of the liver of pregnant rats and the growth and development of the fetal rats were observed. Results The serum levels of ALT, ALP, GC in rats of UDCA group were decreased significantly as compared with those in DEX group ( P

Administration, Oral ; Anaphylaxis ; chemically induced ; physiopathology ; therapy ; Anti-Bacterial Agents ; administration & dosage ; adverse effects ; Blood Pressure ; drug effects ; Child ; Diarrhea ; drug therapy ; Humans ; Male ; Ofloxacin ; administration & dosage ; adverse effects ; Treatment Outcome

Dust ; analysis ; Laboratories ; standards ; Quality Control ; Reference Standards