title: [Determination of reactive oxygen species in mitochondria by fluorometric probe].
abstract: OBJECTIVE
  Based on the reaction that 2',7'-dichlorodihydrofluorescein (DCFH) can be oxidized by reactive oxygen species (ROS) to yield the highly fluorescent 2',7'-dichlorofluorescin (DCF), ROS production in mitochondria can be observed dynamically as well as quantified directly by spectrofluorometer.
  
  
  CONCLUSIONS
  DCF fluorescence showed linear increase in State 4 mitochondria, which suggest ROS produced at constant rate. The slopes of the linear increase in fluorescence with time were computed performing a linear regression that took into account all relevant data points in selected time windows. The slopes were proportional to ROS production in mitochondria. Addition of sodium azide and malonic acid increased and decreased the rate of ROS production respectively during measurement. DCF fluorescence varied linearly with increasing concentration of mitochondria, which showed quantitative relations in definite range. Repeated measures showed low coefficients of variation. This method is reliable and efficient for determining ROS in mitochondria.
authors.affiliation: Tianjin Research Institute of Sports Medicine, Tianjin 300381, China.
authors.forename: Jin-Lei
authors.initials: JL
authors.lastname: Nie
authors.forename: Qing-De
authors.initials: QD
authors.lastname: Shi
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Li
authors.forename: Shu-Sen
authors.initials: SS
authors.lastname: Liu
mesh_terms: D000818:Animals; D005452:Fluoresceins; D015200:Fluoroimmunoassay / Q000379:methods*; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D008928:Mitochondria / Q000378:metabolism*; D017382:Reactive Oxygen Species / Q000032:analysis*
chemical_list: D005452:Fluoresceins; D017382:Reactive Oxygen Species; C037631:2',7'-dichlorofluorescein