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Comparision Of Retinol Plasma Levels In Patients With Bladder Cancer And Healthy Volunteer With HPLC-DAD Methods After A Single Oral β-Carotene Administration | 6119
ISSN: 2155-9872

Journal of Analytical & Bioanalytical Techniques
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Comparision of Retinol Plasma Levels in Patients with Bladder Cancer and Healthy Volunteer with HPLC-DAD Methods after a Single Oral β-Carotene Administration

International Conference & Exihibition On Analytical and Bioanalytical Techniques - 2010

Yucel Kadioglu, Fatma Demirkaya

ScientificTracks Abstracts: J Anal Bioanal Techniques

DOI: 10.4172/2155-9872.1000001

Abstract
The disease-preventing activity of b -carotene could be ascribed either to their conversion into retinoid or to their activity as intact molecules.The aim of study were to develop and validate a simple, precise, accurate and specific HPLC-DAD method for determination of retinol from human plasma and to examine whether retinol levels of patients with bladder cancer are increased or decreased when compared to healthy volunteers after a single oral administration of 20 mg of b -carotene. The chromatographic conditions of the HPLC-DAD methods using vitamin K 2 as the internal standard (IS) were optimized. Retinol and IS were extracted into n-hexane and chloroform containing butylated hydroxytoluene solvent system.The method has a wide linear over the 0.5-10 μg/mL of concentration range (the endogenous retinol has a concentration of approximately 0.79μg/mL). The precision (RSD %) of this method was less than 7.9%, and accuracy (RE) was better than � 9.1 (n=6). The developed and validated method could be successfully applied to determination of retinol measured in plasma samples (one milliliter blood samples were collected at 0 (before dosing) and 2.5 h after dosing) from six healthy volunteers and six bladder cancer patients following oral administration of single dose of b -carotene. Obtained data in this study were compared by Student-t test (at 95% coeffidence level). There is no significant difference between plasma concentration of retinol of healthy volunteers and bladder cancer patients (for 0 h; t h =1.374; P>0.05, for 2.5 h; t h =0.208; P>0.05).
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