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2015 ; 8
(3
): 3371-80
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Study on the function and mechanism of atorvastatin in regulating leukemic cell
apoptosis by the PI3K/Akt pathway
#MMPMID26064227
Liu M
; Tang R
; Jiang Y
Int J Clin Exp Med
2015[]; 8
(3
): 3371-80
PMID26064227
show ga
OBJECTIVE: To investigate the effects of atorvastatin on the proliferation and
apoptosis of leukemic cell lines (Jurkat, K562 and HL-60), and expore the
function of TLR4/MYD88/NF-?B and PI3K/AKT signal pathway in this process.
METHODS: Cells in logarithmic growth phase were divided into negative control
group and experimental group (cells were treated with atorvastatin with
intervention concentrations of 1, 5 and 10 ?mol/L respectively) and cultured for
24 hours. Changes in apoptosis and cell cycle of leukemic cells were detected
utilizing the Flow Cytometry. Changes in the expression of TLR4/MYD88/NF-?B and
PI3K/AKT signal pathway related genes were detected utilizing Real-time PCR and
Western Blot method. RESULTS: Atorvastatin inhibit proliferation and induce
apoptosis in K562, HL-60 and Jurkat cells in a dose-dependent manner. K562, HL-60
and Jurkat cells in G0/G1 phase increased and that in S phase decreased after
being treated with atorvastatin for 24 hours compared with that in control group,
suggesting that the atorvastatin can retard the three cells in the G0/G1 phase.
The study find that the basal expressions of TLR4, MYD88 and NF-?B gene in K562,
HL-60 and Jurkat cells are obviously down-regulated in a dose-dependent manner
after being treated with atorvastatin with different concentrations. This
down-regulation action of atorvastatin to the expression of the TLR4, MYD88 and
NF-?B gene becomes more obvious with the increase of the drug level. In addition,
the PI3K, AKT and their phosphorylation levels in the above cells down-regulate
obviously in a dose-dependent manner after being treated with atorvastatin. This
down-regulation action of atorvastatin to the PI3K, AKT and their phosphorylation
levels become more obvious with the increase of the drug level. CONCLUSIONS:
Atorvastatin can inhibit proliferation and induce apoptosis in leukemia cells,
which may be associated with the regulation of atorvastatin to the
TLR4/MYD88/PI3K/AKT/NF-?B signaling pathway.