FH and cancer: Mutations in many of these Fe-S cluster enzymes including succinate dehydrogenase subunits SDHD, SDHB and SDHC [35] and fumarate hydratase [36] are implicated in hyperproliferative disorders and cancer, demonstrating an important link between cellular metabolism and subsequent transformation and highlights a role for HIF, via a miR-210-ISCU axis in these processes.