Ederle 2019 J Clin Med
|Ederle C, Charles AL, Khayath N, Poirot A, Meyer A, Clere-Jehl R, Andres E, De Blay F, Geny B (2019) Mitochondrial function in peripheral blood mononuclear cells (PBMC) is enhanced, together with increased reactive oxygen species, in severe asthmatic patients in exacerbation. J Clin Med 8:E1613.|
Abstract: Asthma is a chronic inflammatory lung syndrome with an increasing prevalence and a rare but significant risk of death. Its pathophysiology is complex, and therefore we investigated at the systemic level a potential implication of oxidative stress and of peripheral blood mononuclear cells' (PBMC) mitochondrial function. Twenty severe asthmatic patients with severe exacerbation (GINA 4-5) and 20 healthy volunteers participated at the study. Mitochondrial respiratory chain complexes activities using different substrates and reactive oxygen species (ROS) production were determined in both groups by high-resolution respirometry and electronic paramagnetic resonance, respectively. Healthy PBMC were also incubated with a pool of plasma of severe asthmatics or healthy controls. Mitochondrial respiratory chain complexes activity (+52.45%, p = 0.015 for VADP) and ROS production (+34.3%, p = 0.02) were increased in asthmatic patients. Increased ROS did not originate mainly from mitochondria. Plasma of severe asthmatics significantly increased healthy PBMC mitochondrial dioxygen consumption (+56.8%, p = 0.031). In conclusion, such asthma endotype, characterized by increased PMBCs mitochondrial oxidative capacity and ROS production likely related to a plasma constituent, may reflect activation of the immune system. Further studies are needed to determine whether increased PBMC mitochondrial respiration might have protective effects, opening thus new therapeutic approaches.
Labels: MiParea: Respiration Pathology: Other Stress:Oxidative stress;RONS Organism: Human Tissue;cell: Blood cells Preparation: Permeabilized cells
Coupling state: LEAK, OXPHOS, ET Pathway: N, S, CIV, NS, ROX HRR: Oxygraph-2k, O2k-Fluorometer
Labels, 2019-10, PBMC, AmR