[Study on autophagy in nucleated red blood cells in patients with myelodysplastic syndromes].
Zhonghua Xue Ye Xue Za Zhi
; 38(5): 432-436, 2017 May 14.
Article
em Zh
| MEDLINE
| ID: mdl-28565745
ABSTRACT
Objective:
To investigate the change of autophagy level of bone marrow nucleated red blood cell (RBC) in patients with myelodysplastic syndromes (MDS) .Methods:
Fifty-four MDS patients and thirty-three controls were enrolled in this study. The mitophagy were observed by transmission electron microscopy (TEM) . The level of autophagy-associated protein LC3B in GlycoA(+) nucleated RBC was measured by flow cytometry. The expressions of ULK1 and mTOR mRNA in GlycoA(+) nucleated RBC were measured by real-time PCR. The expression of the mitochondrial outer membrane protein TOM20 in GlycoA(+) nucleated RBC was detected by Western blot.Results:
Autophagosomes or autolysosomes were scarcely observed by TEM in MDS patients. The expression of LC3B in GlycoA(+) nucleated RBC in high-risk MDS patients (0.22±0.12) was significantly lower than that in normal controls (0.43±0.22, P<0.001) , and lower than that in low-risk MDS patients (0.40±0.16, P=0.001) . The expression of AMPK [0.26 (0.60) ] in GlycoA(+) nucleated RBC in high-risk MDS patients was significantly lower than that in controls [1.00 (2.07) , P<0.017) . The expression of ULK1 mRNA in GlycoA(+) nucleated RBC in high-risk MDS patients [0.27 (3.31) ] was significantly lower than that in controls [1.07 (4.41) , P<0.017]. The level of mTOR mRNA in GlycoA(+) nucleated RBC in high-risk MDS patients [1.82 (3.74) ] was significantly higher than that in controls [1.26 (1.38) , P<0.017]. The level of LC3B in GlycoA(+) nucleated RBC was negatively correlated with the HGB (r=0.529, P=0.009) in high-risk MDS patients. The expression of mitochondrial outer membrane protein TOM20 in high-risk MDS patients was 9.42±4.42.Conclusion:
Autophagy is impaired in nucleated RBC of MDS patients.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Autofagia
Limite:
Humans
Idioma:
Zh
Ano de publicação:
2017
Tipo de documento:
Article