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The Effect of Rice Bran Extract on the Apoptosis Induction of HL-60 Leukemia Cells  

Kim, Eun-Ji (Department of Medicine, School of Medicine, Jeju National University)
Moon, Jungsun (College of Pharmacy, Sahmyook University)
Kang, Jung-Il (Department of Medicine, School of Medicine, Jeju National University)
Lee, Young-Ki (Department of Medicine, School of Medicine, Jeju National University)
Koh, Young-Sang (Department of Medicine, School of Medicine, Jeju National University)
Yoo, Eun-Sook (Department of Medicine, School of Medicine, Jeju National University)
Kang, Hee-Kyoung (Department of Medicine, School of Medicine, Jeju National University)
Yim, Dongsool (College of Pharmacy, Sahmyook University)
Publication Information
Korean Journal of Pharmacognosy / v.44, no.3, 2013 , pp. 269-274 More about this Journal
Abstract
In this study, we investigated the anticancer effect of rice bran extract in HL-60 human promyelocytic leukemia cells. The extract of rice bran inhibited the proliferation of HL-60 cells. When treated with the rice bran extract, we could observe the apoptotic characteristics such as apoptotic bodies and the increase of sub-G1 hypodiploid cell population, increase of Bax level, decrease of Bcl-2 expression, cleavage of procaspase-3, cleavage of procaspase-9 and cleavage of poly(ADP-ribose) polymerase(PARP) in HL-60 cells. Furthermore, the apoptosis induction of HL-60 cells treated with the rice bran extract was also accompanied by the inactivation of mitogen-activated protein kinases (MAPK) such as ERK1/2 MAPK and p38 MAPK. In addition, the rice bran extract induced the down-regulation of c-myc. These data suggested that the rice bran extract could induce the apoptosis via the inactivation of ERK1/2 MAPK and p38 MAPK, and the down-regulation of c-myc in HL-60 acute pomyelocytic leukemia cells. The results support that the rice bran extract might have potential for the treatment of acute promyelocytic leukemia.
Keywords
rice bran extract; HL-60 cells; apoptosis; MAPK; c-myc;
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