Abstract
It has previously been demonstrated that baculovirus infection of the Spodoptera frugiperda Sf-9 (Sf-9) and Trichoplusia ni BTI-Tn-5B1-4 (Tn-5B1-4) insect cell lines leads to oxidative stress as measured by protein and membrane lipid oxidation and that this oxidative damage contributes to cell death. As a result of these findings, it was hypothesized that baculovirus infection stimulates superoxide radical (O ·—2 synthesis in the mitochondria and that the resulting O ·—2 accumulation overwhelms the cells’ antioxidant defenses. We investigated the ability of manganese superoxide dismutase (MnSOD) expression (which reduces O ·—2 to H2O2) to overcome the oxidative damage caused by baculovirus infection. It was found that MnSOD expression significantly reduced oxidative damage in baculovirus-infected Tn-5B1-4 cells but had no significant effect on oxidative damage in baculovirus-infected Sf-9 cells. The results are consistent with the hypothesis that O ·—2 accumulation in the mitochondria is at least partially responsible for the oxidative damage resulting from the baculovirus infection of insect cells.
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Wang, Y., Oberley, L.W., Howe, D. et al. Effect of expression of manganese superoxide dismutase in baculovirus-infected insect cells. Appl Biochem Biotechnol 119, 181–193 (2004). https://doi.org/10.1385/ABAB:119:2:181
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DOI: https://doi.org/10.1385/ABAB:119:2:181