Development of monoclonal antibody against isoquinoline alkaloid coptisine and its application for the screening of medicinal plants

Jun Sik Kim, Hiroyuki Tanaka, Chun Su Yuan, Yukihiro Shoyama

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In the development of immunoassay technique, the design of hapten containing a functional group suitable for protein conjugate is the key step for the preparation of antibodies against small molecules. Coptisine (MW 320), a bioactive constituent of Berberis and Coptis species, is small as an immunogen. In addition, coptisine has no reactive group in molecule for conjugating with a protein. To overcome this problem, 9-O-carboxymethyl-berberrubine was designed and conjugated with carrier protein. In order to confirm its immunogenicity, the ratio of hapten in the conjugate was determined by matrix-assisted laser desorption/ ionization time of flight mass spectrometry (MALDI-TOF MS). After immunization, hybridomas secreting antibodies against coptisine were produced by fusing splenocytes with mouse myeloma cell line, P3-X63-Ag8-653. Among hybridomas, the clone 2A1 secreting anti-coptisine monoclonal antibody (MAb) 2A1-9E-1 was obtained through the limited dilution method. The MAb-based enzyme-linked immunosorbent assay (ELISA) against coptisine was developed and characterized. The linear range of the assay in this ELISA method was extended from 1.56 to 25 μg ml -1 possessing the detection limit of 1.56 μg ml -1 . The established ELISA using MAb 2A1-9E-1 was applied for the survey of isoquinoline alkaloids in various medicinal plants.

Original languageEnglish
Pages (from-to)115-123
Number of pages9
JournalCytotechnology
Volume44
Issue number3
DOIs
Publication statusPublished - Dec 1 2004

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Alkaloids
Monoclonal antibodies
Medicinal Plants
Assays
Screening
Immunosorbents
Monoclonal Antibodies
Enzymes
Antibodies
Haptens
Enzyme-Linked Immunosorbent Assay
Hybridomas
Immunization
Proteins
Coptis
Berberis
Molecules
Functional groups
Dilution
Ionization

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Biomedical Engineering
  • Clinical Biochemistry
  • Cell Biology

Cite this

Development of monoclonal antibody against isoquinoline alkaloid coptisine and its application for the screening of medicinal plants. / Kim, Jun Sik; Tanaka, Hiroyuki; Yuan, Chun Su; Shoyama, Yukihiro.

In: Cytotechnology, Vol. 44, No. 3, 01.12.2004, p. 115-123.

Research output: Contribution to journalArticle

Kim, Jun Sik ; Tanaka, Hiroyuki ; Yuan, Chun Su ; Shoyama, Yukihiro. / Development of monoclonal antibody against isoquinoline alkaloid coptisine and its application for the screening of medicinal plants. In: Cytotechnology. 2004 ; Vol. 44, No. 3. pp. 115-123.
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