HAMP and myeloproliferative neoplasm: Hepcidin levels are also regulated by inflammatory cytokines, such as IL-6; IL-6 regulates the expression of hepcidin via the JAK-STAT3 pathway, which is hyperactivated in myeloproliferative neoplasms (MPNs) [28,37] and contributes to the increased hepcidin levels detected in primary MF patients [38].