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2017 ; 8
(ä): 18
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Ferrous Iron Up-regulation in Fibroblasts of Patients with Beta Propeller
Protein-Associated Neurodegeneration (BPAN)
#MMPMID28261264
Ingrassia R
; Memo M
; Garavaglia B
Front Genet
2017[]; 8
(ä): 18
PMID28261264
show ga
Mutations in WDR45 gene, coding for a beta-propeller protein, have been found in
patients affected by Neurodegeneration with Brain Iron Accumulation, NBIA5 (also
known as BPAN). BPAN is a movement disorder with Non Transferrin Bound Iron
(NTBI) accumulation in the basal ganglia as common hallmark between NBIA classes
(Hayflick et al., 2013). WDR45 has been predicted to have a role in autophagy,
while the impairment of iron metabolism in the different NBIA subclasses has not
currently been clarified. We found the up-regulation of the ferrous iron
transporter (-)IRE/Divalent Metal Transporter1 and down-regulation of Transferrin
receptor in the fibroblasts of two BPAN affected patients with splicing mutations
235+1G>A (BPAN1) and 517_519?Val 173 (BPAN2). The BPAN patients showed a
concomitant increase of intracellular ferrous iron after starvation. An altered
pattern of iron transporters with iron overload is highlighted in BPAN human
fibroblasts, supporting for a role of DMT1 in NBIA. We here present a novel
element, about iron accumulation, to the existing knowledge in field of NBIA.
Attention is focused to a starvation-dependent iron overload, possibly accounting
for iron accumulation in the basal ganglia. Further investigation could clarify
iron regulation in BPAN.