A novel mutation in the SLC40A1 gene associated with reduced iron export in vitro

作者：Moreno Carralero Maria Isabel; Munoz Munoz Juan Antonio; Cuadrado Grande Nuria; Lopez Rodriguez Rafaela; Jose Hernandez Alfaro Maria; del Castillo Rueda Alejandro; Enriquez de Salamanca Rafael; Mendez Manuel; Moran Jimenez Maria Josefa^*

来源：American Journal of Hematology, 2014, 89(7): 689-694.

DOI：10.1002/ajh.23714

Ferroportin disease is an inherited disorder of iron metabolism and is caused by mutations in the ferroportin gene (SLC40A1). We present a patient with hyperferritinemia, iron overload in the liver with reticuloendothelial distribution and also in the spleen, and under treatment with erythropheresis. A molecular study of the genes involved in iron metabolism (HFE, HJV, HAMP, TFR2, SLC40A1) was undertaken. In vitro functional studies of the novel mutation found in the SLC40A1 gene was performed. The patient was heterozygous for a novel mutation, c. 386T> C (p. L129P) in the SLC40A1 gene; some of his relatives were also heterozygous for this mutation. In vitro functional studies of the L129P mutation on ferroportin showed it impairs its capacity to export iron from cells but does not alter its sensitivity to hepcidin. These findings and the iron overload phenotype of the patient suggest that the novel mutation c. 386T> C (p. L129P) in the SLC40A1 gene has incomplete penetrance and causes the classical form of ferroportin disease. Am. J. Hematol. 89: 689-694, 2014. VC 2014 Wiley Periodicals, Inc.

• 出版日期2014-7