Cellular bioenergetics, caspase activity and glutathione in murine lungs infected with influenza A virus.
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.
Departments of Pediatrics, College of Medicine and Health Sciences, United Arab Emirates University, P.O. Box 17666, Al Ain, United Arab Emirates. Electronic address: alsuwaidia@uaeu.ac.ae.
Ahmed R
AR
Alsuwaidi
Saeeda
S
Almarzooqi
Alia
A
Albawardi
Sheela
S
Benedict
Jose
J
Kochiyil
Farah
F
Mustafa
Stacey M
SM
Hartwig
Steven M
SM
Varga
Abdul-Kader
AK
Souid
D000255:Adenosine Triphosphate / Q000096:biosynthesis; D000818:Animals; D017209:Apoptosis; D020169:Caspases / Q000378:metabolism*; D019069:Cell Respiration; D005978:Glutathione / Q000378:metabolism*; D009980:Influenza A virus / Q000472:pathogenicity*; D008168:Lung / Q000473:pathology* / Q000503:physiopathology / Q000821:virology*; D051379:Mice; D008807:Mice, Inbred BALB C; D010084:Oxidation-Reduction
D000255:Adenosine Triphosphate; D020169:Caspases; D005978:Glutathione
Caspase-3; Cellular ATP; Cellular bioenergetics; Cellular glutathione; Cellular respiration; Influenza A virus