Changes in evoked brain oxygen during sensory stimulation and conditioning☆
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Increase of reactive oxygen species generation in cerebral cortex slices after the transiently enhanced metabolic activity
2017, Neuroscience ResearchCitation Excerpt :An increase in physiological activity stimulates oxygen demand to supply more ATP. Neural activity-induced changes in tissue oxygen levels have been reported to reduce tissue pO2 levels (Travis and Clark, 1965; Fujii et al., 1982; Foster et al., 2005; Offenhauser et al., 2005). We hypothesized that superoxide generation may increase during the restoration process from transiently decreased tissue pO2 to normoxia followed by enhanced energy metabolism.
Characterisation of carbon paste electrodes for real-time amperometric monitoring of brain tissue oxygen
2011, Journal of Neuroscience MethodsCitation Excerpt :Since the pioneering ‘brain polarography’ research carried out by Clark and colleagues (Clark et al., 1953; Thompson et al., 2003) over 50 years ago a wide variety of electrodes (sensors) have been used. These can essentially be divided into two main groups: noble metal electrodes, such as Pt (Clark et al., 1958; Travis and Clark, 1965; Thompson et al., 2003; Offenhauser et al., 2005) and Au (Cooper, 1963; Holmström et al., 1998; El-Deab and Ohsaka, 2003); and carbon-based electrodes, such as glassy carbon (Clark and Clark, 1964), carbon fibre (Zimmerman and Wightman, 1991; Zimmerman et al., 1992; Venton et al., 2003), carbon epoxy (Bazzu et al., 2009), and carbon paste (CPE) (Lowry et al., 1996, 1997; Bolger and Lowry, 2005). While carbon electrodes tend to be more labour intensive in terms of their construction, they have the advantage that they are less prone to surface poisoning and as such do not require the use of protecting membranes which are a characteristic of metal-based O2 electrodes.
A method for measuring brain partial pressure of oxygen in unanesthetized unrestrained subjects: The effect of acute and chronic hypoxia on brain tissue PO<inf>2</inf>
2010, Journal of Neuroscience MethodsCitation Excerpt :Another important feature is that brain PtO2 is quantified in absolute units (mmHg or kPa). The use of absolute units allows for comparison between subjects, unlike the method of calibration in units of delta current (Travis and Clark, 1965; Lowry et al., 1997; Lowry and Fillenz, 2001). These features allow us to rapidly measure brain PtO2 during physiological conditions, avoiding the need for re-calibration (Lowry et al., 1997; Lowry and Fillenz, 2001; Ma and Wu, 2008; Bazzu et al., 2009).
Optical and pharmacological tools to investigate the role of mitochondria during oxidative stress and neurodegeneration
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This investigation was supported by Public Health Service Grants MH-08820, HE-03109 and HE-06353.