Title:Heterogeneity of Red Blood Cell Deformability Caused by Lipopolysaccharide
based on a Microfluidic Chip
Volume: 24
Issue: 14
Author(s): Yue Chen, Zhen Liu, Huaze Shao, Jun Xu, Jincheng Li, Haoyi Chen, Chunqiong Zhou and Lihong Liu*
Affiliation:
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of
New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
Keywords:
Lipopolysaccharide, red blood cell deformability, microfluidic chip, inter-individual variability, oxidative damage, energy metabolism.
Abstract:
Introduction: Alterations in red blood cell deformability (RBC-df) provide important
information for the diagnosis of various diseases.
Aim: We evaluated individual differences of lipopolysaccharide (LPS)-induced oxidative damage
of RBC-df and analyzed the correlation between RBC-df and biochemical parameters.
Methods: A microfluidic chip was developed to detect inter-individual variability of different
concentrations of LPS-induced oxidative damage of RBC-df in 9 healthy volunteers. The relationships
between various biochemical indicators (Na+-K+-ATPase activity, lipid peroxide (LPO) content,
glutathione peroxidase (GSH-PX) activity, catalase (CAT) activity, superoxide dismutase
(SOD) activity, adenosine triphosphate (ATP) content, and hemoglobin (HB) content) and RBCsdf
were investigated.
Results: The obvious inter-individual variability of LPS-induced oxidative damage of RBC-df was
revealed. The Na+-K+-ATPase activity, LPO content, GSH-PX activity, and CAT activity of RBCs
showed significant correlations with RBC-df (P < 0.05).
Conclusion: Oxidative damage and energy metabolism are the critical factors of RBC-df impairment
induced by LPS, and the individual dependence on RBC-df is an important indicator for the
treatment of infection-associated sepsis since antibiotics can kill pathogenic bacteria, which results
in the release of LPS from the cell wall.