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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 Open+Biol
2016 ; 6
(2
): 150155
Nephropedia Template TP
gab.com Text
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English Wikipedia
Notch stimulates growth by direct regulation of genes involved in the control of
glycolysis and the tricarboxylic acid cycle
#MMPMID26887408
Slaninova V
; Krafcikova M
; Perez-Gomez R
; Steffal P
; Trantirek L
; Bray SJ
; Krejci A
Open Biol
2016[Feb]; 6
(2
): 150155
PMID26887408
show ga
Glycolytic shift is a characteristic feature of rapidly proliferating cells, such
as cells during development and during immune response or cancer cells, as well
as of stem cells. It results in increased glycolysis uncoupled from mitochondrial
respiration, also known as the Warburg effect. Notch signalling is active in
contexts where cells undergo glycolytic shift. We decided to test whether
metabolic genes are direct transcriptional targets of Notch signalling and
whether upregulation of metabolic genes can help Notch to induce tissue growth
under physiological conditions and in conditions of Notch-induced hyperplasia. We
show that genes mediating cellular metabolic changes towards the Warburg effect
are direct transcriptional targets of Notch signalling. They include genes
encoding proteins involved in glucose uptake, glycolysis, lactate to pyruvate
conversion and repression of the tricarboxylic acid cycle. The direct
transcriptional upregulation of metabolic genes is PI3K/Akt independent and
occurs not only in cells with overactivated Notch but also in cells with
endogenous levels of Notch signalling and in vivo. Even a short pulse of Notch
activity is able to elicit long-lasting metabolic changes resembling the Warburg
effect. Loss of Notch signalling in Drosophila wing discs as well as in human
microvascular cells leads to downregulation of glycolytic genes. Notch-driven
tissue overgrowth can be rescued by downregulation of genes for glucose
metabolism. Notch activity is able to support growth of wing during
nutrient-deprivation conditions, independent of the growth of the rest of the
body. Notch is active in situations that involve metabolic reprogramming, and the
direct regulation of metabolic genes may be a common mechanism that helps Notch
to exert its effects in target tissues.