Cell Reports (Mar 2020)

c-Src Promotes Tumorigenesis and Tumor Progression by Activating PFKFB3

  • Huanhuan Ma,
  • Jia Zhang,
  • Lin Zhou,
  • Shixiong Wen,
  • Hsiang-Yu Tang,
  • Bin Jiang,
  • Fengqiong Zhang,
  • Muhammad Suleman,
  • Dachao Sun,
  • Ai Chen,
  • Wentao Zhao,
  • Furong Lin,
  • Ming-Tong Tsau,
  • Lu-Min Shih,
  • Changchuan Xie,
  • Xiaotong Li,
  • Donghai Lin,
  • Li-Man Hung,
  • Mei-Ling Cheng,
  • Qinxi Li

Journal volume & issue
Vol. 30, no. 12
pp. 4235 – 4249.e6

Abstract

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Summary: Reprogramming of glucose metabolism is a key event in tumorigenesis and progression. Here, we show that active c-Src stimulates glycolysis by phosphorylating (Tyr194) and activating PFKFB3, a key enzyme that boosts glycolysis by producing fructose-2,6-bisphosphate and activating PFK1. Increased glycolysis intermediates replenish non-oxidative pentose phosphate pathway (PPP) and serine pathway for biosynthesis of cancer cells. PFKFB3 knockout (KO) cells and their counterpart reconstituted with PFKFB3-Y194F show comparably impaired abilities for proliferation, migration, and xenograft formation. Furthermore, PFKFB3-Y194F knockin mice show impaired glycolysis and, mating of these mice with APCmin/+ mice attenuates spontaneous colon cancer formation in APCmin/+ mice. In summary, we identify a specific mechanism by which c-Src mediates glucose metabolism to meet cancer cells’ requirements for maximal biosynthesis and proliferation. The PFKFB3-Tyr194 phosphorylation level highly correlates with c-Src activity in clinical tumor samples, indicating its potential as an evaluation for tumor prognosis. : Ma et al. identify a mechanism of c-Src in promoting tumorigenesis and progression by phosphorylating and activating PFKFB3, an indispensable activator of the rate-limiting enzyme PFK1. PFKFB3 activation further stimulates glycolysis that provides precursors for biosynthesis of proliferating tumor cells.