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2017 ; 7
(1
): 11722
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Hormetic potential of methylglyoxal, a side-product of glycolysis, in switching
tumours from growth to death
#MMPMID28916747
Nokin MJ
; Durieux F
; Bellier J
; Peulen O
; Uchida K
; Spiegel DA
; Cochrane JR
; Hutton CA
; Castronovo V
; Bellahcène A
Sci Rep
2017[Sep]; 7
(1
): 11722
PMID28916747
show ga
Metabolic reprogramming toward aerobic glycolysis unavoidably favours
methylglyoxal (MG) and advanced glycation end products (AGEs) formation in cancer
cells. MG was initially considered a highly cytotoxic molecule with potential
anti-cancer value. However, we have recently demonstrated that MG enhanced tumour
growth and metastasis. In an attempt to understand this dual role, we explored
MG-mediated dicarbonyl stress status in four breast and glioblastoma cancer cell
lines in relation with their glycolytic phenotype and MG detoxifying capacity. In
glycolytic cancer cells cultured in high glucose, we observed a significant
increase of the conversion of MG to D-lactate through the glyoxalase system.
Moreover, upon exogenous MG challenge, glycolytic cells showed elevated amounts
of intracellular MG and induced de novo GLO1 detoxifying enzyme and Nrf2
expression. Thus, supporting the adaptive nature of glycolytic cancer cells to MG
dicarbonyl stress when compared to non-glycolytic ones. Finally and consistent
with the pro-tumoural role of MG, we showed that low doses of MG induced AGEs
formation and tumour growth in vivo, both of which can be reversed using a MG
scavenger. Our study represents the first demonstration of a hormetic effect of
MG defined by a low-dose stimulation and a high-dose inhibition of tumour growth.
|*Cell Proliferation
[MESH]
|*Glycolysis
[MESH]
|*Hormesis
[MESH]
|Cell Death
[MESH]
|Cell Line, Tumor
[MESH]
|Glycation End Products, Advanced/metabolism
[MESH]