Vitamin E: An assistant for black soldier fly to reduce cadmium accumulation and toxicity

Shi, Zhihui, Wan, Yujia, Peng, Miao, Zhang, Jie, Gao, Zhenghui, Wang, Xiaoping and Zhu, Fen 2024. Vitamin E: An assistant for black soldier fly to reduce cadmium accumulation and toxicity. Environment International 185 , 108547. 10.1016/j.envint.2024.108547

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Abstract

Cadmium (Cd) is a toxic heavy metal associated with osteoporosis, liver, and kidney disease. The black soldier fly (BSF) Hermetia illucens may be exposed to Cd during the transformation of livestock manure. The BSF has a high tolerance to Cd. In the previous work of the laboratory, we found that vitamin E (VE) may play a role in the tolerance of BSF to Cd exposure. The main findings are as follows: The BSF larvae pretreated with exogenous VE had heavier body weight, lower content and toxicity of Cd under similar Cd exposure. Even in high Cd exposure at the concentrations of 300 and 700 mg/kg, the BSF larvae pretreated with exogenous VE at a concentration of 100 mg/kg still reduced the Cd toxicity to 85.33 % and 84.43 %, respectively. The best-fitting models showed that metallothionein (MT) content, oxidative damage (8-hydroxydeoxyguanosine content, malondialdehyde content), antioxidant power (total antioxidant power, peroxidase activity) had a great influence on content and toxicity of Cd bioaccumulated in the larvae. The degree of oxidative damage was reduced in the larvae with exogenous VE pretreatments. This variation can be explained by their changed MT content and increased antioxidant power because of exogenous VE. These results reveal the roles of VE in insects defense against Cd exposure and provide a new option for the prevention and therapy of damage caused by Cd exposure.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	0160-4120
Date of First Compliant Deposit:	30 April 2024
Date of Acceptance:	29 February 2024
Last Modified:	30 Apr 2024 10:46
URI:	https://orca.cardiff.ac.uk/id/eprint/167751

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