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2015 ; 9
(6
): 2905-2909
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Doxorubicin activates the Notch signaling pathway in osteosarcoma
#MMPMID26137168
Mei H
; Yu L
; Ji P
; Yang J
; Fang S
; Guo W
; Liu Y
; Chen X
Oncol Lett
2015[Jun]; 9
(6
): 2905-2909
PMID26137168
show ga
Notch signaling is critical in various biological processes, including cell
proliferation, differentiation and apoptosis. Furthermore, accumulating evidence
indicated that aberrant Notch signaling has a tumor-promoting function in
osteosarcoma. However, the effect of the conventional chemotherapeutic agent,
doxorubicin, on Notch signaling remains unclear. In the present study,
osteosarcoma cells were treated with various concentrations of doxorubicin and
the effect on Notch signaling was analyzed. A cytostatic dose of doxorubicin
(<0.5 µM) was identified to significantly activate the Notch signaling pathway in
a dose-dependent manner (P<0.01), as demonstrated by the elevated expression
levels of Notch target genes. However, a toxic dose of doxorubicin (?0.5 µM)
significantly inhibited the Notch signaling pathway (P<0.01). These results
indicated a significant correlation between doxorubicin administration and the
Notch signaling pathway. Therefore, the present study supports further
investigation into Notch and osteosarcoma chemoresistance.