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Pan, Wei,Bae, Soo-Kyung,Shim, Eon-Jeong,Park, Sung-Eun,Lee, Sang-Seop,Park, Soo-Jin,Yeo, Chang-Woo,Zhou, Hong-Hao,Shon, Ji-Hong,Shin, Jae-Gook Informa Healthcare 2013 Xenobiotica Vol.43 No.2
<OL><LI><P>Plasma concentrations of sibutramine and its two active metabolites after single oral dose of sibutramine were determined in Korean healthy male subjects with different CYP2B6 genotypes (CYP2B6*1/*1, *1/*6 and *6/*6), either alone or after four-day pretreatment with clopidogrel or clarithromycin.</P></LI><LI><P>The pretreatment with clopidogrel and clarithromycin raised the mean area under the concentration-time curve (AUC) of sibutramine by 163% and 255%, respectively.</P></LI><LI><P>Co-administration of clarithromycin, combined with <I>CYP2B6*6/*6</I> genotype, led to highest concentration of sibutramine.</P></LI><LI><P>The molar sum AUC (M1 + M2) was raised by 35% in the clopidogrel phase but not significantly affected by clarithromycin or CYP2B6 genotype.</P></LI><LI><P>The <I>CYP2B6*6/*6</I> subjects in the clopidogrel phase showed the highest molar AUC (M1 + M2) among three genotype groups throughout the three phases.</P></LI><LI><P>The exposure of sibutramine and its metabolites seemed to be associated with the CYP2B6 genotype.</P></LI><LI><P>The treatment of clopidogrel significantly altered the disposition of active metabolites as well as sibutramine, but clarithromycin only affects the disposition of sibutramine.</P></LI><LI><P>These results suggest that the perturbation of CYP2B6 activity may contribute to the inter-individual variation of sibutramine drug responses although the clinical relevance is remained to be established.</P></LI></OL>
Deng, Jian-Wei,Kim, Kwon-Bok,Song, Im-Sook,Shon, Ji-Hong,Zhou, Hong-Hao,Liu, Kwang-Hyeon,Shin, Jae-Gook John Wiley Sons, Ltd. 2008 Biomedical chromatography Vol.22 No.2
<P>We developed a method for determining pravastatin or pitavastatin, 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors, in plasma using liquid chromatography and tandem mass spectrometry (LC–MS/MS). Pravastatin, pitavastatin and the internal standard fluvastatin were extracted from plasma with solid-phase extraction columns and eluted with methanol. After drying the organic layer, the residue was reconstituted in mobile phase (acetonitrile:water, 90:10, v/v) and injected onto a reversed-phase C<SUB>18</SUB> column. The isocratic mobile phase was eluted at 0.2 mL/min. The ion transitions recorded in multiple reaction monitoring mode were m/z 423 → 101, 420 → 290 and 410 → 348 for pravastatin, pitavastatin and fluvastatin, respectively. The coefficient of variation of the assay precision was less than 12.4%, the accuracy exceeded 89%. The limit of detection was 1 ng/mL for all analytes. This method was used to measure the plasma concentration of pitavastatin or pravastatin from healthy subjects after a single 4 mg oral dose of pitavastatin or 40 mg oral dose of pravastatin. This is a very simple, sensitive and accurate analytic method to determine the pharmacokinetic profiles of pitavastatin or pravastatiny. Copyright © 2007 John Wiley & Sons, Ltd.</P>
Zheng Gui Zhong,Kim Bo-Yeon,Yoon Hyung-Joo,Wei Ya Dong,Xijie Guo,Jin Byung-Rae,Shon Hung-Dae Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.14 No.1
In a previous study, three larval cuticle protein genes were cloned from the mulberry longicorn beetle, Apriona germari (Comp. Biochem. Physiol. B 136, 803-811, 2003). In the present study, the genomic structures of these three larval cuticle protein genes (AgLCP9.2, AgLCP12.6 and AgLCP12.3) were elucidated. All three cuticle protein genes consist of one intron and two exons. Southern blot analysis of genomic DNA suggested that three cuticle protein genes are a single copy gene. In addition, a novel larval cuticle protein gene, AgLCP10.6, was cloned from A. germari in this study. The AgLCP10.6 cDNA contains an ORF of 300 nucleotides that are capable of encoding a 100-amino acid polypeptide with a predicted molecular mass of 10.6 kDa. The amino acid sequence deduced from the AgLCP10.6 cDNA contained a type-specific consensus sequence identifiable in other insect cuticle proteins and is most homologous to Drosophila melanogaster cuticle protein ACP65A (51 % protein sequence identity). Northern blot analysis revealed that AgLCP10.6 showed epidermis-specific expression.
( Gui Zhong Zheng ),( Bo Yeon Kim ),( Hyung Joo Yoon ),( Ya Dong Wei ),( Guo Xi Jie ),( Byung Rae Jin ),( Hung Dae Shon ) 한국잠사학회 2007 International Journal of Industrial Entomology Vol.14 No.1
In a previous study, three larval cuticle protein genes were cloned from the mulberry longicorn beetle, Apriona germari (Comp. Biochem. Physiol. B 136,803-811, 2003). In the present study, the genomic structures of these three larval cuticle protein genes (AgLCP9.2, AgLCP12.6 and AgLCP12.3) were elucidated. All three cuticle protein genes consist of one intron and two exons. Southern blot analysis of genomic DNA suggested that three cuticle protein genes are a single copy gene. In addition, a novel larval cuticle protein gene, AgLCP10.6, was cloned from A. germari in this study. The AgLCP10.6 cDNA contains an ORF of 300 nucleotides that are capable of encoding a 100-amino acid polypeptide with a predicted molecular mass of 10.6 kDa. The amino acid sequence deduced from the AgLCP10.6 cDNA contained a type-specific consensus sequence identifiable in other insect cuticle proteins and is most homologous to Drosophila melanogaster cuticle protein ACP65A (51 % protein sequence identity). Northern blot analysis revealed that AgLCP10.6 showed epidermis-specific expression.