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2018 ; 2018
(ä): 6328051
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Impaired Mitophagy of Nucleated Erythroid Cells Leads to Anemia in Patients with
Myelodysplastic Syndromes
#MMPMID29967662
Jiang H
; Yang L
; Guo L
; Cui N
; Zhang G
; Liu C
; Xing L
; Shao Z
; Wang H
Oxid Med Cell Longev
2018[]; 2018
(ä): 6328051
PMID29967662
show ga
Myelodysplastic syndromes (MDS) are a heterogeneous group of clonal stem cell
disorders characterized by cytopenia and dysplasia. Anemia is the most common
symptom in patients with MDS. Mitophagy and mitochondrial dysfunction might be
involved in the development of MDS. In this study, we investigated the change of
mitophagy in erythroid precursors in MDS patients. We found that NIX-mediated
mitophagy was impaired in bone marrow nucleated red blood cells (NRBC) of MDS
patients, associated with an increased amount of damaged mitochondria and
increased ROS level which might lead to apoptosis and ineffective erythropoiesis.
The results showed that the amount of mitochondria in GlycoA(+) NRBC positively
correlated with the count of ring sideroblasts in bone marrow samples. Meanwhile,
the level of autophagy-associated marker LC3B in GlycoA(+) NRBC had a positive
correlation with hemoglobin (Hb) levels, and the amount of mitochondria in
GlycoA(+) NRBC had a negative correlation with Hb levels in high-risk MDS
patients. Our results indicated that mitophagy might involve the pathogenesis of
anemia associated with MDS. Autophagy might be a novel target in treatments of
MDS patients.