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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Physiol
2018 ; 9
(ä): 210
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Bisecting N-Acetylglucosamine Structures Inhibit Hypoxia-Induced
Epithelial-Mesenchymal Transition in Breast Cancer Cells
#MMPMID29593568
Tan Z
; Wang C
; Li X
; Guan F
Front Physiol
2018[]; 9
(ä): 210
PMID29593568
show ga
The epithelial-mesenchymal transition (EMT) process plays a key role in many
biological processes, including tissue fibrosis, metastatic diseases, and cancer
progression. EMT can be induced by certain factors, notably hypoxia, in the tumor
microenvironment. Aberrant levels of certain N-glycans is associated with cancer
progression. We used an integrated strategy (mass spectrometry in combination
with lectin microarray analysis) to elucidate aberrant glycosylation in a
hypoxia-induced EMT model using breast cancer cell lines MCF7 and MDA-MB-231. The
model showed reduced levels of bisecting GlcNAc structures, and downregulated
expression of the corresponding glycosyltransferase MGAT3. MGAT3 overexpression
in MCF7 suppressed cell migration, proliferation, colony formation, expression of
EMT markers, and AKT signaling pathway, whereas MGAT3 knockdown (shRNA silencing)
had opposite effects. Our findings clearly demonstrate the functional role (and
effects of dysregulation) of bisecting GlcNAc structures in hypoxia-induced EMT,
and provide a useful basis for further detailed studies of physiological
functions of these structures in breast cancer.