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Setup of Capillary Electrophoresis-Inductively Coupled Plasma Mass Spectrometry (CE-ICP-MS) for Quantification of Iron Redox Species (Fe(II), Fe(III))
Published on: May 4, 2020
[In vitro effect of iron overload on bone marrow cell function by inducing the reactive oxygen species]
Fang Xie1, Ming-feng Zhao, Yu-ming Li
1Tianjin First Central Hospital, Tianjin Medical University, Tianjin 300192, China.
Objective:
To investigate the in vitro effect of iron overload on the generation of reactive oxygen species (ROS) and of bone marrow (BM) cell function.
Methods:
BM mononuclear cells (BMMNCs) were cultured with ferric citrate (FAC) at different concentrations and for different time to create iron overload and confirmed by the detection of cellular labile iron pool (LIP). The changes of ROS, apoptosis, hematopoietic colony formation (CFU-E, BFU-E, CFU-GM and CFU-mix) and the percentage of the CD34 + cells percentage were analyzed. The differences of these index were tested after the iron overload treated with deferasirox (DFO) or antioxidants (N-acetyl-L-cysteine, NAC).
Results:
1) When BMMNCs were cultured with FAC, the LIP was found to increase in a time and concentration dependent manner. The intracellular LIP reached maximum at 400 micromol/L of FAC for 24 hours. 2) The ROS of total cells, leukocytes and erythrocytes increased to 1.77, 1.75 and 2.12 fold respectively compared with that of normal control when cells were cultured at 400 micromol/L of FAC for 24 hours . DFO and NAC could reduce the ROS efficiently (P<0.05). 3) The apoptotic rates of the FAC treated cells [(24.80 +/- 2.99)%] increased significantly compared with that of normal control [(8.90 +/- 0.96)%]. The capacity of hematopoietic colony formation in FAC treated cells decreased markedly compared with that of normal control (P<0.05). The percentage of CD34+ cells of FAC treated cells [(0.39 +/- 0.07)%] also decreased significantly compared with that of normal control [(0.91 +/- 0.12)%]. And these changes could be recovered by addition of NAC or DFO.
Conclusion:
Iron overload can affect the hematopoiesis by inducing the generation of ROS and this damage could be corrected by removing the excess iron and ROS of the BM cells. These findings might improve the treatment of dyshematopoiesis in patients with iron overload.
Insights
Iron overload increases reactive oxygen species (ROS) and impairs bone marrow cell function, affecting hematopoiesis. This damage can be reversed by removing excess iron and ROS.
Area of Science:
- Hematology
- Cell Biology
- Toxicology
Context:
- Iron overload is a condition where excess iron accumulates in the body.
- This accumulation can lead to cellular damage and dysfunction.
- Bone marrow is critical for hematopoiesis, the process of blood cell formation.
Purpose:
- To investigate the in vitro effects of iron overload on bone marrow mononuclear cells (BMMNCs).
- To assess the impact of iron overload on reactive oxygen species (ROS) generation and BMMNC function.
- To evaluate the potential of deferasirox (DFO) and N-acetyl-L-cysteine (NAC) in mitigating iron overload-induced damage.
Summary:
- Culturing BMMNCs with ferric citrate (FAC) increased labile iron pool (LIP) in a time- and concentration-dependent manner.
- Iron overload significantly elevated ROS levels, increased apoptosis, and reduced hematopoietic colony formation and CD34+ cell percentage.
- Treatment with DFO or NAC effectively reduced ROS and reversed the negative effects on BMMNCs.
Impact:
- Iron overload adversely affects hematopoiesis through ROS generation.
- Therapeutic strategies targeting iron chelation and ROS reduction can correct these hematological impairments.
- Findings may inform treatments for dyshematopoiesis in iron overload conditions.
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