PMID- 29806036 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 2380-2367 (Print) IS - 2380-2367 (Electronic) VI - 4 IP - 10 DP - 2017 Jul TI - Measurement of Mitochondrial Mass by Flow Cytometry during Oxidative Stress. PG - 275-283 LID - 10.20455/ros.2017.839 [doi] AB - Properly assessing mitochondrial health is crucial to understand their role in disease. MitoTracker green (MTG) and nonylacridine orange (NAO) are fluorescent probes which have been commonly used to assess mitochondrial mass. This is based on the assumption that both MTG and NAO accumulate in mitochondria regardless of the mitochondrial transmembrane potential (DeltaPsi(m)). Here, we utilized flow cytometry to evaluate the performance of these probes for assessment of mitochondrial mass relative to forward (FSC) and side scatter (SSC) in human peripheral blood lymphocytes (PBL). In isolated mitochondria, two subpopulations were identified by FSC and SSC measurements which were matched to subpopulations stained by MTG and NAO. The performance of these dyes was examined under oxidative and nitrosative stress induced by rotenone and NOC-18 while N-acetylcysteine (NAC) was employed as an antioxidant. Production of reactive oxygen species (ROS) and DeltaPsi(m) were monitored in parallel. With respect to representation of mitochondrial mass, neither MTG nor NAO was affected by DeltaPsi(m). However, MTG showed significant correlation with cytosolic and mitochondrial ROS production and nitrosative stress. Our data suggest that NAO may be more suitable than MTG for assessment of mitochondrial mass by flow cytometry during oxidative stress. FAU - Doherty, Edward AU - Doherty E AD - Division of Rheumatology, Departments of Medicine, Microbiology and Immunology, and Biochemistry and Molecular Biology, State University of New York, Upstate Medical University, College of Medicine, Syracuse, NY 13210, USA. FAU - Perl, Andras AU - Perl A AD - Division of Rheumatology, Departments of Medicine, Microbiology and Immunology, and Biochemistry and Molecular Biology, State University of New York, Upstate Medical University, College of Medicine, Syracuse, NY 13210, USA. LA - eng GR - R01 DK078922/DK/NIDDK NIH HHS/United States GR - R01 DK049221/DK/NIDDK NIH HHS/United States GR - R01 AI122176/AI/NIAID NIH HHS/United States GR - R01 AI048079/AI/NIAID NIH HHS/United States GR - R21 AI061066/AI/NIAID NIH HHS/United States GR - R01 AI072648/AI/NIAID NIH HHS/United States PT - Journal Article DEP - 20170701 PL - United States TA - React Oxyg Species (Apex) JT - Reactive oxygen species (Apex, N.C.) JID - 101688617 PMC - PMC5964986 MID - NIHMS967385 OTO - NOTNLM OT - Flow cytometry OT - MitoTracker green OT - Mitochondrial mass OT - Nonylacridine orange OT - Oxidative stress EDAT- 2018/05/29 06:00 MHDA- 2018/05/29 06:01 PMCR- 2018/05/23 CRDT- 2018/05/29 06:00 PHST- 2018/05/29 06:00 [entrez] PHST- 2018/05/29 06:00 [pubmed] PHST- 2018/05/29 06:01 [medline] PHST- 2018/05/23 00:00 [pmc-release] AID - 10.20455/ros.2017.839 [doi] PST - ppublish SO - React Oxyg Species (Apex). 2017 Jul;4(10):275-283. doi: 10.20455/ros.2017.839. Epub 2017 Jul 1.