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1991 ; 82
(1
): 127-33
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Novel mechanism of N-solanesyl-N,N -bis(3,4-dimethoxybenzyl)ethylenediamine in
potentiation of antitumor drug action on multidrug-resistant and sensitive
Chinese hamster cells
#MMPMID1671855
Tomida A
; Tatsuta T
; Suzuki H
Jpn J Cancer Res
1991[Jan]; 82
(1
): 127-33
PMID1671855
show ga
The mechanism of the synthetic isoprenoid
N-solanesyl-N,N'-bis(3,4-dimethoxybenzyl)ethylenediamine (SDB-ethylenediamine) in
potentiating antitumor drug action against multidrug-resistant cells was
comparatively studied with other potentiators such as verapamil and
cepharanthine. SDB-ethylenediamine increased the accumulation of [3H]daunorubicin
(DNR) in Chinese hamster V79 (V79/S) and its multidrug-resistant mutant (V79/ADM)
cells. Even after SDB-ethylenediamine was removed from the medium, its effect
continued. But when verapamil was removed from the medium, its effect disappeared
immediately. Unlike verapamil and cepharanthine, SDB-ethylenediamine did not
greatly inhibit the efflux of [3H]DNR from V79/ADM, the binding of
[3H]vinblastine to membrane vesicles of V79/ADM, or the binding of [3H]azidopine
to P-glycoprotein in the cytoplasmic membrane of V79/ADM. It did stimulate the
influx of [3H]DNR into the ATP-depleted cells of V79/S and V79/ADM. Thus,
SDB-ethylenediamine uniquely potentiates antitumor drugs. The increased
intracellular accumulation of antitumor drugs in the presence of
SDB-ethylenediamine is due not only to the inhibition of active efflux but also
to the stimulation of the influx of antitumor drugs.
|ATP Binding Cassette Transporter, Subfamily B, Member 1
[MESH]