Immunochemical detection of food-derived isothiocyanate as a lysine conjugate

Biosci Biotechnol Biochem. 2010;74(3):536-40. doi: 10.1271/bbb.90728. Epub 2010 Mar 7.

Abstract

In a previous study we prepared monoclonal antibody against allyl isothiocyanate (AITC)-modified lysine (Lys), and found that AITC reacted with Lys under physiological conditions in vitro (T. Nakamura et al., Chem. Res. Toxicol., 22, 536-542 (2009)). In the present study, antibodies against benzyl isothiocyanate (ITC), 6-methylsulfinylhexyl ITC and phenethyl ITC modified protein were prepared, and the respective monoclonal antibodies, B6C9, 6MS3D10, and PE3A10 were obtained. These antibodies were applied to ITC detection in food using shredded Wasabia japonica (wasabi) and ground Carica papaya (papaya) seed by trapping ITC with biotin-labeled bovine serum albumin. ITC formation from the wasabi and papaya seed samples was confirmed using the antibodies in a dose-dependent manner. These antibodies might be applicable in identifying food-derived ITC.

MeSH terms

  • Allyl Compounds / chemistry
  • Allyl Compounds / immunology*
  • Animals
  • Antibodies, Monoclonal / immunology
  • Carica / chemistry
  • Cattle
  • Enzyme-Linked Immunosorbent Assay
  • Food Analysis / methods*
  • Isocyanates / chemistry
  • Isocyanates / immunology*
  • Isothiocyanates / analysis*
  • Isothiocyanates / chemistry
  • Isothiocyanates / immunology
  • Lysine / chemistry*
  • Lysine / immunology
  • Serum Albumin, Bovine / chemistry
  • Wasabia / chemistry

Substances

  • 6-methylsulfinylhexyl isothiocyanate
  • Allyl Compounds
  • Antibodies, Monoclonal
  • Isocyanates
  • Isothiocyanates
  • allyl isocyanate
  • Serum Albumin, Bovine
  • phenethyl isothiocyanate
  • benzyl isothiocyanate
  • Lysine