This Drosophila model is designed to recapitulate the switch to high levels of aerobic glycolysis observed in many aggressive cancers (the Warburg effect). An activated form of Dmel\Pvr, a single-pass transmembrane receptor tyrosine kinase that feeds into multiple oncogenic signaling pathways, is used to induce a high glycolytic state in a subset of cells in the wing disc; localized tumorous overgrowth is observed in the affected wing discs. Aerobic glycolysis in tumors is characterized by the conversion of pyruvate to lactate by the enzyme lactate dehydrogenase (LDH); elevated levels of LDH are observed in the the tumors produced by cells expressing activated Pvr (Pvrλ.UASp.Tag:MYC). Other markers of the glycolytic pathway vs. those of oxidative phosphorylation have been assessed; members of the network of genes required to establish and maintain this metabolic reprogramming process have been identified.
See also the gene group pathway report for the Pvr signaling pathway (FBgg0000972) and the human disease model report 'cancer, aerobic glycolysis (Warburg effect), ERR model' (FBhh0000502). The Warburg effect may be one of the contributing factors in the development of cachexia. See human disease model reports 'cachexia, IGFBP-related' (FBhh0000535) and 'cachexia, yki-induced ISC tumor model' (FBhh0001115).
[updated Feb. 2020 by FlyBase; FBrf0222196]
PDGF/VEGF-receptor related (Pvr) encodes a receptor tyrosine kinase activated by the binding of PDGF- and VEGF-related factors (Pvf1, Pvf2 or Pvf3). Pvr has been shown to activate the canonical Ras/Raf/MAP kinase (ERK) cascade, the PI3K kinase pathway, TORC1, Rho family small GTPases, and the JNK cascade in a context-dependent manner. [from FBgg0000972]
Moderate- to high-scoring ortholog of 6 genes in human, including FLT1, FLT4, and KDR; lower-scoring ortholog of additional human genes (1 Drosophila to many human).