Keiko Yamashita

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OBJECTIVES SLCO1B1*5 and SLCO1B1*15 have been reported to reduce the clearance of pravastatin in healthy volunteers. However, there remains controversy in the effects of SLCO1B1*5 on the activity of OATP1B1 in vitro. In addition, the effect of SLCO1B1*15 on the function of OATP1B1 has not been studied using cDNA-expression systems. Object of the present(More)
To address the issue of excess polyethylene glycol (PEG)-lipid degradation observed when PEG-modified liposomes are prepared using the pH-gradient method, a concept using a novel PEG-modification method, called the post-modification method, was proposed and evaluated. To assess the proof concept, a preservation-stability study and a pharmacokinetic study(More)
In the present study, we analyzed the function of a novel mutation (c.1628T>G, p.Leu543Trp) in the solute carrier organic anion transporter (SLCO) 1B1 gene, encoding organic anion transporting polypeptide (OATP) 1B1, which was identified in a patient with pravastatin-induced myopathy. OATP1B1 variants carrying the mutation (OATP1B1*1a+c.1628T>G or(More)
PURPOSE To compare the optic disc parameters of glaucomatous eyes to those of non-glaucomatous eyes with large discs. METHODS We studied 225 consecutive eyes with large optic discs (>2.82 mm2): 91 eyes with glaucoma and 134 eyes without glaucoma. An eye was diagnosed with glaucoma when visual field defects were detected by the Humphrey Field Analyzer. All(More)
The genetic nature of low capsaicin content in variant strains induced by grafting was elucidated by crossing the G5S23 strain with the two cultivars, ‘Yatsubusa’ (Capsicum annuum L. var. fasciculatum Ilish) and ‘Spanish Paprika’ (C. annuum L. grossum Sendt) originally used for grafting. Decreased capsaicin synthesis was a stable characteristic for at least(More)
Isotactic (it) and syndiotactic (st) poly(methyl methacrylate)s (PMMAs) were assembled on a poly(ethylene terephthalate) cell disk (as a solid substrate), which is normally used for cell culture, to produce ultrathin stereocomplex films. Static contact angles of the films using air bubbles in aqueous phase revealed the stepwise assembly of both polymers.(More)
Recently, a polyethylene glycol (PEG)-modification method for liposomes prepared using pH-gradient method has been proposed. The differences in the pharmacokinetics and the impact on the antitumor effect were examined; however the impact of PEG-lipid molar weight has not been investigated yet. The main purpose of this study is to evaluate the impact of(More)
In order to evaluate the drug-release behavior from pH-gradient liposomal formulation, a simple release-testing method without using biological components was newly designed on the basis of inversed ammonia gradient principle. Various factors influencing drug-release (releasing factor) were examined. As a result, releasing factor's concentration, pH,(More)
The butterfliesPapilio helenus andP. protenor were shown to feed mainly on the nectar of the glory bower,Clerodendron trichotomum, which was the most abundant nectar plant in summer in the study area. Both the species were found to have a proboscis longer than 24 mm corresponding to the length of the corolla tube ofC. trichotomum. Visits to the flowers by(More)