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2018 ; 15
(5
): 6291-6296
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Blue light-induced apoptosis of human promyelocytic leukemia cells via the
mitochondrial-mediated signaling pathway
#MMPMID29731847
Zhuang J
; Liu Y
; Yuan Q
; Liu J
; Liu Y
; Li H
; Wang D
Oncol Lett
2018[May]; 15
(5
): 6291-6296
PMID29731847
show ga
Acute promyelocytic leukemia is frequently associated with dizziness, fever,
nausea, hematochezia and anemia. Blue light, or light with wavelengths of 400-480
nm, transmits high levels of energy. The aim of the present study was to
determine the pro-apoptotic effects of blue light (wavelength, 456 nm; radiation
power, 0.25 mW/cm(2)) and the underlying mechanisms in a human promyelocytic
leukemia cell line (HL60). Blue light reduced the viability and enhanced the
mortality of HL60 cells in a time-dependent manner. Exposure to blue light for 24
h caused depolarization of the mitochondrial membrane potential and the
overproduction of reactive oxygen species in HL60 cells. In a nude mouse model,
9-day exposure to blue light markedly suppressed the growth of HL60-xenografted
tumors; however, it had no effect on hepatic and renal tissues. In addition, blue
light abrogated the expression of B-cell lymphoma (Bcl)-2 and Bcl extra-long,
while enhancing the levels of Bcl-2-associated X protein, cytochrome c, and
cleaved caspases-3 and -9 in tumor tissues. The results suggested that the
pro-apoptotic effects of blue light in human promyelocytic leukemia cells may be
associated with the mitochondrial apoptosis signaling pathway.