Determination of Cellular Aminopropyltransferase Activity Using Precolumn Fluorescent Etheno-Derivatization with High-Performance Liquid Chromatography

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  • YAMAZAKI Kenichi
    Laboratory of Bio-analytical Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Josai University
  • IKEGUCHI Yoshihiko
    Laboratory of Bio-analytical Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Josai University
  • NIWA Takuya
    Laboratory of Bio-analytical Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Josai University
  • HAYASHI Kaoru
    Laboratory of Bio-analytical Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Josai University
  • IWAKI Takahiro
    Laboratory of Bio-analytical Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Josai University
  • ISHII Ikumi
    Laboratory of Bio-analytical Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Josai University
  • NIITSU Masaru
    Laboratory of Bio-analytical Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Josai University
  • PEGG Anthony E.
    Department of Cellular and Molecular Physiology, Milton S. Hershey Medical Center, Pennsylvania State University College of Medicine
  • SHIRAHATA Akira
    Laboratory of Bio-analytical Chemistry, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Josai University

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Abstract

Polyamines such as spermidine (Spd) and spermine (Spm), produced by aminopropyltransferase (Apt), play roles in cell growth and differentiation. A sensitive and simple fluorometric high-performance liquid chromatographic determination for Apt activity of spermidine synthase (Spdsyn) and spermine synthase (Spmsyn) was developed in order to examine cellular functions of polyamine synthesis. The derivatization procedure for methylthioadenosine (MTA) produced from decarboxylated S-adenosylmethionine by Apt was the reaction with 2-chloroacetaldehyde to give fluorescent 1, N6-etheno methylthioadenosine. The reaction conditions for derivatization were optimized. A calibration curve was established, ranging from 0.01 to 25 pmol. Quantification of derivatized MTA was confirmed to be identical to Spd or Spm production. The developed method determined Spdsyn and Spmsyn activities in HepG2 cells treated with oleic acid as a cellular lipid accumulation model.

Journal

  • Analytical Sciences

    Analytical Sciences 28 (6), 621-624, 2012

    The Japan Society for Analytical Chemistry

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