Variable sensitivity of lymphoblastoid cells to apoptosis induced by Viscum album Qu FrF, a therapeutic preparation of mistletoe lectin.

Abstract:

BACKGROUND:Viscum album (VA) Qu FrF preparation consists of an aqueous extract of Viscum album, the European mistletoe. It has cytotoxic and immunomodulatory properties that support its usefulness in cancer therapy. However, only little information is available on the interaction between mistletoe lectin (ML) and the humoral compartment of the immune system. METHODS:Inhibition of proliferation of cells was performed by incorporation of (3)H-thymidine, and cell viability was assessed by the uptake of propidium iodide. Detection of Bcl-2 and related molecules was performed by SDS-PAGE followed by immunoblotting. RESULTS:We demonstrated that B lymphocyte lines are insensitive to VA Qu FrF-induced apoptosis. We showed, using Fas-sensitive and Fas-resistant cell lines, that VA Qu FrF-induced apoptosis is Fas independent. In both B and T lymphocytes, treatment of the cells with VA Qu FrF was associated with decreased levels of Bcl-2 and Bcl-X. CONCLUSIONS:Our results suggest that B lymphocyte depletion is not involved in the modulation of humoral immunity by ML. These observations should be of value in appropriate designing of cancer therapy using compounds containing mistletoe extracts.

journal_name

Chemotherapy

journal_title

Chemotherapy

authors

Duong Van Huyen JP,Sooryanarayana,Delignat S,Bloch MF,Kazatchkine MD,Kaveri SV

doi

10.1159/000048545

subject

Has Abstract

pub_date

2001-09-01 00:00:00

pages

366-76

issue

5

eissn

0009-3157

issn

1421-9794

pii

48545

journal_volume

47

pub_type

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