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Article Abstract
Apolipophorin-III (apoLp-III), a hemolymph protein that facilitates lipid transport in aqueous media in insects was recently shown to play a role in insect immune activation. Here, we report another novel possible function of apoLp-III in insects. To identify genes affected by apoLp-III expression in larvae, we decreased endogenous apoLp-III mRNA in Hyphantria cunea (Hc) through RNA interference; subsequently, we observed lower levels of antioxidant enzymes, including manganese superoxide dismutase (MnSOD), glutathione S-transferase, and immune proteins. Knockdown of Hc apoLp-III led to decreased MnSOD expression in fat body tissues and elevated superoxide anion levels in Hc fat body cells, suggesting that Hc apoLp-III is involved in the action and/or expression of antioxidant enzymes, especially MnSOD.
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| http://dx.doi.org/10.1016/j.cbpa.2011.03.022 | DOI Listing |
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