Publication details
The effects of boric acid-induced oxidative stress on antioxidant enzymes and survivorship in Galleria mellonella
| Authors | |
|---|---|
| Year of publication | 2007 |
| Type | Article in Periodical |
| Magazine / Source | Archives of Insect Biochemistry and Physiology |
| MU Faculty or unit | |
| Citation | |
| Field | Physiology |
| Keywords | Galleria mellonella; boric acid; antioxidant enzymes; hemolymph; fat body; malondialdehyde; survivorship |
| Description | Larvae of the wax moth, Galleria mellonella (L.), were reared from first instar on a diet supplemented with 156, 620, 1250, or 2500 ppm boric acid (BA). The content of malondialdehyde (MDA, an oxidative stress indicator), and activities of the antioxidant enzymes [superoxide dismutase (SOD), catalase (CAT), glutathione S-transferase (GST) and glutathione peroxidase (GPx)] were determined in the fat body and hemolymph in the 7th instar larvae and newly emerged pupae. Relative to control larvae, MDA was significantly increased in larval hemolymph, larval and pupal fat body, but decreased in the pupal hemolymph. Insects reared on diets with 156 and 620 ppm BA doses yielded increased SOD activity but 1250 and 2500 ppm doses resulted in decreased SOD activity in larval hemolymph. SOD activity was significantly increased but CAT was decreased in the larval fat body. High dietary BA treatments led to significantly decreased GST activity, however they increased GPx activity in larval hemolymph. Dietary BA also affected larval survival. The 1250 and 2500 ppm concentrations led to significantly increased larval and pupal mortality and prolonged development. By contrast, the lowest BA concentration increased longevity and shortened development. We infer that BA toxicity is related, at least in part, to oxidative stress management. |