Minihepcidin peptides as disease modifiers in mice affected by β-thalassemia and polycythemia vera

Blood. 2016 Jul 14;128(2):265-76. doi: 10.1182/blood-2015-10-676742. Epub 2016 May 6.


In β-thalassemia and polycythemia vera (PV), disordered erythropoiesis triggers severe pathophysiological manifestations. β-Thalassemia is characterized by ineffective erythropoiesis, reduced production of erythrocytes, anemia, and iron overload and PV by erythrocytosis and thrombosis. Minihepcidins are hepcidin agonists that have been previously shown to prevent iron overload in murine models of hemochromatosis and induce iron-restricted erythropoiesis at higher doses. Here, we show that in young Hbb(th3/+) mice, which serve as a model of untransfused β-thalassemia, minihepcidin ameliorates ineffective erythropoiesis, anemia, and iron overload. In older mice with untransfused β-thalassemia, minihepcidin improves erythropoiesis and does not alter the beneficial effect of the iron chelator deferiprone on iron overload. In PV mice that express the orthologous JAK2 mutation causing human PV, administration of minihepcidin significantly reduces splenomegaly and normalizes hematocrit levels. These studies indicate that drug-like minihepcidins have a potential as future therapeutics for untransfused β-thalassemia and PV.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Substitution
  • Animals
  • Erythropoiesis*
  • Hepcidins / genetics
  • Hepcidins / metabolism
  • Hepcidins / pharmacology*
  • Janus Kinase 2 / genetics
  • Janus Kinase 2 / metabolism
  • Mice
  • Mice, Mutant Strains
  • Mutation, Missense
  • Peptides / genetics
  • Peptides / metabolism
  • Peptides / pharmacology*
  • Polycythemia Vera / genetics
  • Polycythemia Vera / metabolism*
  • beta-Thalassemia / genetics
  • beta-Thalassemia / metabolism*


  • Hepcidins
  • Peptides
  • Jak2 protein, mouse
  • Janus Kinase 2