Possible use of indole-3-acetic acid and its antagonist tryptophan betaine in controlled killing of horseradish peroxidase-labeled human cells.

Abstract:

:It has been proposed that combination of indole-3-acetic acid (IAA) and horseradish peroxidase (HRP) could be useful as the basis for targeted cancer therapy involving antibody-, polymer-, or gene-directed approaches. By circulating IAA in human body, the cells labeled with HRP could be selectively killed since cytotoxic radical species are produced by IAA-HRP reaction. To enable the finely geared controls in selective killing of the cells, the author propose the use of a fungal alkaloid, hypaphorine known to act against IAA in growing plants, in combination with IAA. Previously, the author and colleagues have shown that hypaphorine competitively inhibits the IAA-dependent superoxide generation by HRP. Since hypaphorine is structurally similar to IAA, the effects of hypaphorine against IAA may be due to competitive binding to the IAA-binding domain on HRP. Our in vitro studies on hypaphorine-based control of the IAA-HRP reaction yielding superoxide, must be re-examined in in vivo systems prior to clinical examination.

journal_name

Med Hypotheses

journal_title

Medical hypotheses

authors

Kawano T

doi

10.1016/s0306-9877(03)00012-4

keywords:

subject

Has Abstract

pub_date

2003-05-01 00:00:00

pages

664-6

issue

5

eissn

0306-9877

issn

1532-2777

pii

S0306987703000124

journal_volume

60

pub_type

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