Renal cyst formation in Fh1-deficient mice is independent of the Hif/Phd pathway: roles for fumarate in KEAP1 succination and Nrf2 signaling.
Renal cyst formation in Fh1-deficient mice is independent of the Hif/Phd pathway: roles for fumarate in KEAP1 succination and Nrf2 signaling.
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DOI:
10.1016/j.ccr.2011.09.006
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发表时间:
2011-10-18
期刊:
影响因子:
50.3
通讯作者:
Pollard PJ
中科院分区:
文献类型:
--
作者:
Adam J;Hatipoglu E;O'Flaherty L;Ternette N;Sahgal N;Lockstone H;Baban D;Nye E;Stamp GW;Wolhuter K;Stevens M;Fischer R;Carmeliet P;Maxwell PH;Pugh CW;Frizzell N;Soga T;Kessler BM;El-Bahrawy M;Ratcliffe PJ;Pollard PJ
The Krebs cycle enzyme fumarate hydratase (FH) is a human tumor suppressor whose inactivation is associated with the development of leiomyomata, renal cysts, and tumors. It has been proposed that activation of hypoxia inducible factor (HIF) by fumarate-mediated inhibition of HIF prolyl hydroxylases drives oncogenesis. Using a mouse model, we provide genetic evidence that Fh1-associated cyst formation is Hif independent, as is striking upregulation of antioxidant signaling pathways revealed by gene expression profiling. Mechanistic analysis revealed that fumarate modifies cysteine residues within the Kelch-like ECH-associated protein 1 (KEAP1), abrogating its ability to repress the Nuclear factor (erythroid-derived 2)-like 2 (Nrf2)-mediated antioxidant response pathway, suggesting a role for Nrf2 dysregulation in FH-associated cysts and tumors. ► Fh1-associated renal cyst formation is independent of Hif/Phd pathway ► Nrf2-mediated antioxidant response pathway is upregulated following Fh1 loss ► Fumarate modifies cysteine residues in Keap1 by succination
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