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2015 ; 20
(2
): 289-95
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Edaravone protects human peripheral blood lymphocytes from ?-irradiation-induced
apoptosis and DNA damage
#MMPMID25181965
Chen L
; Liu Y
; Dong L
; Chu X
Cell Stress Chaperones
2015[Mar]; 20
(2
): 289-95
PMID25181965
show ga
Radiation-induced cellular injury is attributed primarily to the harmful effects
of free radicals, which play a key role in irradiation-induced apoptosis. In this
study, we investigated the radioprotective efficacy of edaravone, a licensed
clinical drug and a powerful free radical scavenger that has been tested against
?-irradiation-induced cellular damage in cultured human peripheral blood
lymphocytes in studies of various diseases. Edaravone was pre-incubated with
lymphocytes for 2 h prior to ?-irradiation. It was found that pretreatment with
edaravone increased cell viability and inhibited generation of
?-radiation-induced reactive oxygen species (ROS) in lymphocytes exposed to 3 Gy
?-radiation. In addition, ?-radiation decreased antioxidant enzymatic activity,
such as superoxide dismutase and glutathione peroxidase, as well as the level of
reduced glutathione. Conversely, treatment with 100 ?M edaravone prior to
irradiation improved antioxidant enzyme activity and increased reduced
glutathione levels in irradiated lymphocytes. Importantly, we also report that
edaravone reduced ?-irradiation-induced apoptosis through downregulation of Bax,
upregulation of Bcl-2, and consequent reduction of the Bax:Bcl-2 ratio. The
current study shows edaravone to be an effective radioprotector against
?-irradiation-induced cellular damage in lymphocytes in vitro. Finally, edaravone
pretreatment significantly reduced DNA damage in ?-irradiated lymphocytes, as
measured by comet assay (% tail DNA, tail length, tail moment, and olive tail
moment) (p?0.05). Thus, the current study indicates that edaravone offers
protection from radiation-induced cytogenetic alterations.