Monoclonal antibodies against naturally occurring bioactive compounds.

Abstract:

:The ratio of hapten to bovine serum albumin (BSA) in an antigen conjugate was determined by matrix-assisted laser desorption/ionization (MALDI) tof mass spectrometry. A hybridoma secreting monoclonal antibody (MAb) was produced by fusing splenocytes immunized with an antigen-BSA conjugate with HAT-sensitive mouse myeloma cells. The cross-reaction of anti-forskolin antibodies with 7-deacetyl forskolin was 5.6%. A very small cross-reaction appeared with other derivatives. The full measuring range of the assay extends from 5 ng to 5 mug/ml of forskolin. Immunoaffinity column chromatography using anti-forskolin MAbs appears to be far superior to previously published separation methods. The capacity of the immunoaffinity column as determined by ELISA is 9 mug/ml. Forskolin has been isolated directly from the crude extracts of tuberous roots and the callus culture of Coleus forskohlii. A MAb against tetrahydrocannabinolic acid (THCA) was produced. The cross-reaction of anti-THCA antibody against other cannabinoids was very wide. Many cannabinoids and a spiro-compound were reactive, but did not react with other phenolics. It became evident that this ELISA was able to be applied to the biotransformation experiments of cannabinoids in plant tissue culture system. Anti-ginsenoside Rb1 MAbs were produced. New western blotting method of determination for ginsenosides was established. Ginsenosides separated by silica gel TLC were transferred to a polyvinylidene difluoride (PVDF) membrane. The membrane was treated with NaIO(4) solution followed by BSA, resulting in a ginsenoside-BSA conjugate. Immunostaining of ginsenosides was more sensitive compared to other staining. Immunostaining of ginsenosides in the fresh ginseng root was succeeded using anti-ginsenoside Rb1 (GRb1) MAb after blotting to PVDF membrane.

journal_name

Cytotechnology

journal_title

Cytotechnology

authors

Shoyama Y,Tanaka H,Fukuda N

doi

10.1023/A:1008051618059

subject

Has Abstract

pub_date

1999-09-01 00:00:00

pages

9-27

issue

1-2

eissn

0920-9069

issn

1573-0778

journal_volume

31

pub_type

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