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. 2013 Nov;446(1-2):180-8.
doi: 10.1016/j.virol.2013.07.034. Epub 2013 Aug 29.

Cellular bioenergetics, caspase activity and glutathione in murine lungs infected with influenza A virus

Ahmed R Alsuwaidi  1 , Saeeda Almarzooqi, Alia Albawardi, Sheela Benedict, Jose Kochiyil, Farah Mustafa, Stacey M Hartwig, Steven M Varga, Abdul-Kader Souid
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Free article

Cellular bioenergetics, caspase activity and glutathione in murine lungs infected with influenza A virus

Ahmed R Alsuwaidi et al. Virology. 2013 Nov.
Free article

Abstract

Inhibition of cellular respiration, oxidation of glutathione and induction of apoptosis have been reported in epithelial cells infected in vitro with influenza A virus (IAV). Here, the same biomarkers were investigated in vivo by assessing the lungs of BALB/c mice infected with IAV. Cellular respiration declined on day 3 and recovered on day 7 post-infection. For days 3-5, the rate (mean±SD) of respiration (µMO2min(-1)mg(-1)) in uninfected lungs was 0.103±0.021 (n=4) and in infected lungs was 0.076±0.025 (n=4, p=0.026). Relative cellular ATP (infected/uninfected) was 4.7 on day 2 and 1.07 on day 7. Intracellular caspase activity peaked on day 7. Cellular glutathione decreased by ≥10% on days 3-7. Lung pathology was prominent on day 3 and caspase-3 labeling was prominent on day 5. IAV infection was associated with suppression of cellular respiration, diminished glutathione, and induction of apoptosis. These functional biomarkers were associated with structural changes noted in infected mice.

Keywords: Caspase-3; Cellular ATP; Cellular bioenergetics; Cellular glutathione; Cellular respiration; Influenza A virus.

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