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Erythrina fusca Lour has been traditionally used to cure hepatosis, malaria, hematuria, and
cancer. The bark of this plant contains  carotene, polifenol, thiamin, saponin, and alkaloid
erythralin and erythramin. The aim of this research was to know the underlying mechanism of its
effect as antiproliferative against Myeloma cells. The bark powder was extracted using ethanol
(70%) and was used for the experiment after freezed drying. Citotoxicity test of this extract
performed LC50 of 0,367 mg/ml. The rate of proliferation was observed by doubling time effect
against proliferating cells. The cells were exposed with ethanolic extract in RPMI 1640 medium
containing 1) 0,25 mg/ml 2) 6,25x10
mg/ml, and 3) 1,56x10
mg/ml and every 0, 6, 12, 24, 48,
and 72 hours cell were counted. The result showed that extract treated cells delayed proliferation at
all concentration with doubling time dose 2) of 161, 38 hours, and dose 3) of 93,91 hours, whereas
doubling time of control cells were 69,86 hours. Ethidium bromide staining of extract treated cells
showed apoptosis like profile. These results indicated that ethanolic extract of the bark of Erythrina
fusca Lour has an antiproliverative effect on Myeloma cell line. Several mechanisms might account
for this effect, like inhibiting cell cycle progression, signal transduction, causing delayed and

Keywords: Erythrina fusca Lour, atiproliferative, Myeloma

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