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2016 ; 7
(15
): 20953-65
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Inhibition of miR301 enhances Akt-mediated cell proliferation by accumulation of
PTEN in nucleus and its effects on cell-cycle regulatory proteins
#MMPMID26967567
Jain MV
; Shareef A
; Likus W
; Cie?lar-Pobuda A
; Ghavami S
; ?os MJ
Oncotarget
2016[Apr]; 7
(15
): 20953-65
PMID26967567
show ga
Micro-RNAs (miRs) represent an innovative class of genes that act as regulators
of gene expression. Recently, the aberrant expression of several miRs has been
associated with different types of cancers. In this study, we show that miR301
inhibition influences PI3K-Akt pathway activity. Akt overexpression in MCF7 and
MDAMB468 cells caused downregulation of miR301 expression. This effect was
confirmed by co-transfection of miR301-modulators in the presence of Akt. Cells
overexpressing miR301-inhibitor and Akt, exhibited increased migration and
proliferation. Experimental results also confirmed PI3K, PTEN and FoxF2 as
regulatory targets for miR301. Furthermore, Akt expression in conjunction with
miR301-inhibitor increased nuclear accumulation of PTEN, thus preventing it from
downregulating the PI3K-signalling. In summary, our data emphasize the importance
of miR301 inhibition on PI3K-Akt pathway-mediated cellular functions. Hence, it
opens new avenues for the development of new anti-cancer agents preferentially
targeting PI3K-Akt pathway.