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Articles by J. HOU
Total Records ( 4 ) for J. HOU
  D. Andes , D. J. Diekema , M. A. Pfaller , R. A. Prince , K. Marchillo , J. Ashbeck and J. Hou
  Multiple in vivo studies have characterized the pharmacodynamics of drugs from the triazole and polyene antifungal drug classes. Fewer studies have investigated these pharmacodynamic relationships for the echinocandin drug class. We used a neutropenic murine model of disseminated Candida albicans, Candida tropicalis, and Candida glabrata infection to characterize the time course of activity of the new echinocandin anidulafungin. The pharmacokinetic-pharmacodynamic (PK-PD) indices (the percentage of time that the drug concentration was above the MIC, the ratio of the area under the concentration-time curve from 0 to 24 h [AUC0-24] to the MIC, and the ratio of the maximum serum drug concentration [Cmax] to the MIC) were correlated with in vivo efficacy, as measured by organism numbers in kidney cultures after 96 h of therapy. The kinetics following intraperitoneal anidulafungin dosing in neutropenic infected mice were monitored. Peak levels and AUCs were linear over the 16-fold dose range studied. The drug elimination half-life in serum ranged from 14 to 24 h. Single-dose postantifungal-effect studies demonstrated prolonged suppression of organism regrowth after serum anidulafungin levels had fallen below the MIC. Of the four dosing intervals studied, treatment with the more widely spaced dosing regimens was most efficacious, suggesting the Cmax/MIC ratio as the PK-PD index most predictive of efficacy. Nonlinear regression analysis suggested that both the Cmax/MIC and AUC/MIC ratios were strongly predictive of treatment success. Studies were then conducted with 13 additional C. albicans, C. tropicalis, and C. glabrata isolates with various anidulafungin susceptibilities (MICs of anidulafungin for these strains, 0.015 to 2.0 µg/ml) to determine if similar Cmax/MIC and AUC0-24/MIC ratios for these isolates were associated with efficacy. The anidulafungin exposures associated with efficacy were similar among Candida species.
  S. PENG , L. CHEN , J.G. QIN , J. HOU , N. YU , Z. LONG , E. LI and J. YE
  A 9-week feeding experiment was conducted to evaluate the effects of dietary vitamin E supplementation on growth, lipid peroxidation and fatty acid composition of black sea bream fed oxidized oil. The FL and OL diets contained fresh fish oil and oxidized oil, respectively, without additional vitamin E supplementation. Another four α-tocopherol levels (150, 250, 450 and 800 mg kg−1 diet) were used within the OL diet, giving a total of six experimental diets. Fish were hand-fed to apparent satiation twice daily. At end of the trial, the weight gain and survival rate of fish were significantly reduced by diets with oxidized oil, whereas hepatosomatic index was remarkably high in fish fed oxidized oil diet. However, vitamin E supplementation to diet significantly improved growth performance and increased vitamin E content in the liver. Although, liver thiobarbituric acid reactive substances and docosahexaenoic acid were significantly increased by dietary oxidized oil, their levels were reduced by dietary vitamin E supplementation. Our results indicate that the fish were performing the best at intermediate concentrations of α-tocopherol and a dose of >150 mg α-tocopherol kg−1 diet could reduce lipid peroxidation and improve fish growth performance when oxidized oils exist in diet.
  G. D. Xiang , J. H. Pu , L. S. Zhao , H. L. Sun , J. Hou and L. Yue
  Aims  Osteoprotegerin (OPG) is a recently identified inhibitor of bone resorption. Recent studies indicate that OPG is also associated with endothelial dysfunction in Type 2 diabetes. The aim was to investigate the relationship between plasma OPG levels and urinary albumin excretion (UAE) in Type 2 diabetic patients.

Methods  This study included 154 newly diagnosed Type 2 diabetic patients and 46 healthy subjects. Plasma OPG and 24-h UAE were measured. High-resolution ultrasound was used to measure flow-mediated (endothelium-dependent arterial) dilation (FMD).

Results  Compared with the normoalbuminuric subgroup, OPG levels in the microalbuminuric subgroup were significantly higher, and OPG levels in macroalbuminuria subgroup were significantly higher than those in the normoalbuminuria and albuminuria subgroups. Multiple regression analysis showed that only FMD (r = −0.26), C-reactive protein (r = 0.23), fasting blood glucose (r = 0.25), 2-h blood glucose (r = 0.21), HbA1c (r = 0.28), UAE (r = 0.27) and retinopathy (r = 0.27) were significant factors associated with OPG. Pearson's correlation analyses showed a positive correlation between OPG and logUAE (r = 0.440) and negative correlations between OPG and FMD (r = −0.284), and between FMD and logUAE (r = −0.602).

Conclusions  Plasma OPG levels are significantly associated with UAE in Type 2 diabetic patients.

  Y.Z. Cheng , J. Hou , X.H. He , Z.K. Hong , L.S. Li , G.H. Lin , M.X. Chen and S.H. Chen
  Paragonimiasis and angiostrongyliasis are important food-borne parasitic diseases in a number of countries including China. Both diseases are transmitted by freshwater and terrestrial intermediate snail hosts. In the present investigation, we examined the prevalence of Paragonimus and Angiostrongylus cantonensis in the intermediate host snails in southeastern China’s Fujian province where paragonimiasis and angiostrongyliasis are endemic. The prevalence of P. westermani cercariae in the stream-type snail Semisulcospira libertine found in the breeding grounds in Shouning county was 0.09% in the upstream and 0.56% in the downstream, respectively. For pit-ditch type, the prevalence of P. westermani cercariae was 0.19% and 0.82% in upstream and downstream, respectively. The snail Tricula xiaoqiaoensis was infected with Paragonimus skrjabini cercariae with prevalence of 0.33% in the pit-ditch type and 1.52% in the seepage type in Zhenghe county. Prevalence of A. cantonensis larvae in Achatina fulica in Nan’an county in garbage stack, vegetable plot and crop land were 83.54, 39.53 and 19.23%, respectively. In Lianjiang county, prevalence of A. cantonensis larvae in snails Pila polita in trench, paddy field, residential ditch, vegetable irrigation ditch and pond in the same river system were 4.08, 8.82, 75.34, 34.04 and 5.56%, respectively. The snail Bellamya lithophaga found in the western suburb of Fuzhou city was identified as the new intermediated host for A. cantonensis with a prevalence of 14.38%. Demonstration of prevalence of Paragonimus and A. cantonensis in wild snails in Fujian province poses substantial risk for future outbreaks of the two food-borne parasitic diseases.
 
 
 
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