Effects of downregulated ATP citrate lyase on the growth and apoptosis of prostate cancer cells / 医学研究生学报

ABSTRACT

Objective Tumor cells are able to support their malignant proliferation by changing metabolic models .Prostate cells rely much on lipid metabolism in which ATP-citrate lyase ( ACLY) plays a very important role .The aim of this research was to study the effects of downregulated ACLY on the cell proliferation , cycle distribution and apoptosis of androgen-independent prostate cancer cells DUl45. Methods DU145 cells were divided into two groupsthe cells in experiment group were transfected with the small interfering RNA-mediated knockdown of ACLY , while the cells in control group were transfected with meaningless small interfering RNA.Cell counting Kit test ( CCK-8 ) was applied to detect the effects of the downregulation of ATP citrate lyase on the proliferation of DU145.Flow cytometry instrument was used to analyze the variation of cell cycle distribution and apoptosis rate between groups .Western blot was used to detect the change of intracellular Caspase-3 protein content. Results Western blot showed favorable effects of ACLY interference .Compared with control group , ACLY protein content significantly decreased in experiment group ( P0.05), while the percentage of G2 cells decreased and the percentage of S cells in-creased with most cell cycle blocking at G 0/G1 stage, which were of significant difference .Meanwhile the expression of apoptosis pro-tein Caspase-3 upregulated significantly . Conclusion ACLY is of vital significance to maintain the malignant proliferation of prostate cancer cells and its downregulation results in the inhibition of cell proliferation and the promotion of cell apoptosis .