Immunochromatographic assay for the detection of pseudojujubogenin glycosides

Natnapa Imsungnoen, Watoo Phrompittayarat, Kornkanok Ingkaninan, Hiroyuki Tanaka, Waraporn Putalun

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)


Introduction - Bacopa monnieri contains pseudojujubogenin glycosides as pharmacologically active compounds. In order to screen large numbers of plant samples for the presence of pseudojujubogenin glycosides, a rapid and simple assay system is required for application to small quantities of test materials. Immunoassays using monoclonal antibodies could be useful for the determination of small quantities of pseudojujubogenin glycosides in plant extracts. Objective - The objective of this work was to develop a simple method for the detection of pseudojujubogenin glycosides by the immunochromatographic strip test using anti-bacopaside I monoclonal antibody. Methodology - The qualitative assay was based on a competitive immunoassay in which the detector reagent consisted of a colloidal gold particle coated with the respective anti-bacopaside I MAb. The capture reagent was a bacopaside I-human serum albumin conjugate immobilised onto a test strip membrane. Results - The sample containing pseudojujubogenin glycosides and the detection reagent were incubated with the immobilised capture reagent. The glycosides in the sample competed in binding to the limited amount of antibodies in the detection reagent with the immobilised bacopaside I-HSA conjugates and, hence, positive samples showed no colour in the capture spot zone. The detection limit for the strip test was 125 ng/mL. Conclusion - The assay system was found to be useful as a rapid and simple screening method for the detection of pseudojujubogenin glycosides in plants.

ジャーナルPhytochemical Analysis
出版ステータス出版済み - 6 2 2009

All Science Journal Classification (ASJC) codes

  • 分析化学
  • 食品科学
  • 生化学
  • 分子医療
  • 植物科学
  • 創薬
  • 補完代替医療


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