An antioxidant response phenotype is shared between hereditary and sporadic type 2 papillary renal cell carcinoma

Fumarate hydratase (FH) mutation causes hereditary type 2 papillary renal cell carcinoma (HLRCC, Hereditary Leiomyomatosis and Renal Cell Cancer (MM ID # 605839)). The main effect of FH mutation is fumarate accumulation. The current paradigm posits that the main consequence of fumarate accumulation is HIF-a stabilization. Paradoxically, FH mutation differs from other HIF-a stabilizing mutations, such as VHL and SDH mutations, in its associated tumor types. We identified that fumarate can directly up-regulate antioxidant response element (ARE)-controlled genes. We demonstrated that AKR1B10 is an ARE-controlled gene and is up-regulated upon FH knockdown as well as in FH-null cell lines. AKR1B10 overexpression is also a prominent feature in both hereditary and sporadic PRCC2. This phenotype better explains the similarities between hereditary and sporadic PRCC2.

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Ooi A, Wong JC, Petillo D, Roossien D, Perrier-Trudova V, Whitten D, Min BW, Tan MH, Zhang Z, Yang XJ, Zhou M, Gardie B, Molinié V, Richard S, Tan PH, Teh BT, Furge KA