1
|
Hano T, Ito M, Sato T, Sugaya T, Sato J, Jusup M, Iwasaki Y. Triple jeopardy: The combined effects of viral, chemical, and thermal stress on kuruma prawn (Penaeus japonicus) juveniles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 952:175934. [PMID: 39218101 DOI: 10.1016/j.scitotenv.2024.175934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 07/15/2024] [Accepted: 08/29/2024] [Indexed: 09/04/2024]
Abstract
Growing concerns have emerged over the combined effects of multiple stressors on ecosystems. Empirical evidence shows that the sensitivity of aquatic invertebrates to insecticides varies under thermally fluctuating conditions. Additionally, field surveys in estuarine areas of western Japan confirmed the presence of juvenile kuruma prawns (Penaeus japonicus) carrying the white spot syndrome virus (WSSV). Given the potential of co-exposure to multiple stressors, we performed a combined exposure experiment using a full-factorial design with three stressors: WSSV infection (presence or absence: initial 2 h exposure), fipronil (insecticide) exposure (0 or 0.1 μg/L: 14 d exposure), and temperature (20, 25, or 30 °C). We observed the highest mortality (75 %) in the WSSV + Fipronil treatment at 30 °C, with the associated specimens showing significant changes in the internal load of WSSV and concentrations of fipronil and its metabolite, fipronil sulfone. Severe perturbations of metabolites associated with increased energy expenditure and fatty acid utilization have been identified as potential factors underlying lethality in juvenile kuruma prawns. The results demonstrate that WSSV infection increases the susceptibility of thermally stressed juvenile kuruma prawns to fipronil. Therefore, further studies are required to determine the combined effects of multiple stressors in environmentally relevant scenarios on juvenile kuruma prawns as well as in estuarine ecosystems.
Collapse
Affiliation(s)
- Takeshi Hano
- Environmental Conservation Division, Fisheries Technology Institute, National Research and Development Agency, Japan Fisheries Research and Education Agency, 2-17-5, Maruishi, Hatsukaichi, Hiroshima 739-0452, Japan.
| | - Mana Ito
- Environmental Conservation Division, Fisheries Technology Institute, National Research and Development Agency, Japan Fisheries Research and Education Agency, 2-17-5, Maruishi, Hatsukaichi, Hiroshima 739-0452, Japan
| | - Taku Sato
- Production Engineering Division, Fisheries Technology Institute, National Research and Development Agency, Japan Fisheries Research and Education Agency, 1760 Momoshima, Onomichi, Hiroshima 722-0061, Japan
| | - Takuma Sugaya
- Production Engineering Division, Fisheries Technology Institute, National Research and Development Agency, Japan Fisheries Research and Education Agency, 1760 Momoshima, Onomichi, Hiroshima 722-0061, Japan
| | - Jun Sato
- Pathology Division, Fisheries Technology Institute, National Research and Development Agency, Japan Fisheries Research and Education Agency, 422-1 Nakatsuhamaura, Minamiise, Mie 722-0061, Japan
| | - Marko Jusup
- Highly Migratory Resource Division, Fisheries Resources Institute, National Research and Development Agency, Japan Fisheries Research and Education Agency, 2-12-4, Fukuura, Kanazawa, Yokohama, Kanagawa 236-8648, Japan
| | - Yuichi Iwasaki
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology, 16-1, Onogawa Tsukuba, Ibaraki 305-8569, Japan
| |
Collapse
|
2
|
Threonine Facilitates Cd Excretion by Increasing the Abundance of Gut Escherichia coli in Cd-Exposed Mice. Molecules 2022; 28:molecules28010177. [PMID: 36615370 PMCID: PMC9822384 DOI: 10.3390/molecules28010177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/14/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022] Open
Abstract
Cadmium (Cd) can easily enter the body through the food chain and threaten health since Cd pollution is prevalent in the environment. Gut microbiota is necessary for the reduction of metal ions. To reduce Cd-induced harmful impacts and Cd accumulation in the body, we investigated the effect of amino acids on gut microbiota and Cd excretion in (fecal Cd) Cd-exposed mice. The screening of 20 amino acids showed that threonine (Thr) effectively increased fecal Cd, and reduced Cd-induced intestinal structural damage. The abundance of Escherichia-Shigella genus and KF843036_g significantly increased after the oral administration of Thr. As the type species of the Escherichia-Shigella genus, Escherichia coli exhibited high similarity to KF843036_g species and significantly decreased Cd-induced gut damage. Cd contents in the liver, kidney, and gut of Cd-exposed mice were also significantly (p < 0.05) decreased after E. coli treatment, while the contents in the feces were increased. The results demonstrated the potential roles that gut E. coli might play in Thr-mediated Cd excretion in Cd-exposed mice. The findings may provide important data for better understanding the molecular biological mechanism of Thr in reducing Cd accumulation in the body.
Collapse
|