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2016 ; 12
(3
): 1896-1900
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Dihydroartemisinin induces endothelial cell anoikis through the activation of the
JNK signaling pathway
#MMPMID27602117
Zhang J
; Guo L
; Zhou X
; Dong F
; Li L
; Cheng Z
; Xu Y
; Liang J
; Xie Q
; Liu J
Oncol Lett
2016[Sep]; 12
(3
): 1896-1900
PMID27602117
show ga
Angiogenesis is required for the growth and metastasis of solid tumors. The
anti-malarial agent dihydroartemisinin (DHA) demonstrates potent anti-angiogenic
activity, but the underlying molecular mechanisms are not yet fully understood.
During the process of angiogenesis, endothelial cells migrating from existing
capillaries may undergo programmed cell death after detaching from the
extracellular matrix, a process that is defined as anchorage-dependent apoptosis
or anoikis. In the present study, DHA-induced cell death was compared in human
umbilical vein endothelial cells (HUVECs) cultured in suspension and attached to
culture plates. In suspended HUVECs, the cell viability was decreased and
apoptosis was increased with the treatment of 50 µM DHA for 5 h, while the same
treatment did not affect the attached HUVECs. In addition, 50 µM DHA increased
the phosphorylation of c-Jun N-terminal kinase (JNK) in suspended HUVECs, but not
in attached HUVECs, for up to 5 h of treatment. The JNK inhibitor, SP600125,
reversed DHA-induced cell death in suspended HUVECs, suggesting that the JNK
pathway may mediate DHA-induced endothelial cell anoikis. The data from the
present study indicates a novel mechanism for understanding the anti-angiogenic
effects of DHA, which may be used as a component for chemotherapy.