Abstract：
:Cancer cells consume large quantities of glucose and primarily use glycolysis for ATP production, even in the presence of adequate oxygen. This metabolic signature (aerobic glycolysis or the Warburg effect) enables cancer cells to direct glucose to biosynthesis, supporting their rapid growth and proliferation. However, both causes of the Warburg effect and its connection to biosynthesis are not well understood. Here we show that the tumour suppressor p53, the most frequently mutated gene in human tumours, inhibits the pentose phosphate pathway (PPP). Through the PPP, p53 suppresses glucose consumption, NADPH production and biosynthesis. The p53 protein binds to glucose-6-phosphate dehydrogenase (G6PD), the first and rate-limiting enzyme of the PPP, and prevents the formation of the active dimer. Tumour-associated p53 mutants lack the G6PD-inhibitory activity. Therefore, enhanced PPP glucose flux due to p53 inactivation may increase glucose consumption and direct glucose towards biosynthesis in tumour cells.
journal_name
Nat Cell Bioljournal_title
Nature cell biologyauthors
Jiang P,Du W,Wang X,Mancuso A,Gao X,Wu M,Yang Xdoi
10.1038/ncb2172subject
Has Abstractpub_date
2011-03-01 00:00:00pages
310-6issue
3eissn
1465-7392issn
1476-4679pii
ncb2172journal_volume
13pub_type
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