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2018 ; 9
(3
): 274-282
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Myc requires RhoA/SRF to reprogram glutamine metabolism
#MMPMID27532209
Haikala HM
; Marques E
; Turunen M
; Klefström J
Small GTPases
2018[May]; 9
(3
): 274-282
PMID27532209
show ga
RhoA regulates actin cytoskeleton but recent evidence suggest a role for this
conserved Rho GTPase also in other cellular processes, including transcriptional
control of cell proliferation and survival. Interestingy, loss of RhoA is
synthetic lethal with oncogenic Myc, a master transcription factor that turns on
anabolic metabolism to promote cell growth in many cancers. We show evidence
indicating that the synthetic lethal interaction between RhoA loss and Myc arises
from deficiency in glutamine utilization, resulting from impaired co-regulation
of glutaminase expression and anaplerosis by Myc and RhoA - serum response factor
(SRF) pathway. The results suggest metabolic coordination between Myc and
RhoA/SRF in sustaining cancer cell viability and indicate RhoA/SRF as a potential
vulnerability in cancer cells for therapeutic targeting.