http://scholars.ntou.edu.tw/handle/123456789/6080
標題: | Sargassum horneri extracts stimulate innate immunity, enhance growth performance, and upregulate immune genes in the white shrimp Litopenaeus vannamei | 作者: | Po-Tsang Lee Hoang Trieu Quan Tran Huai-Ting Huang Fan-Hua Nan Meng-Chou Lee |
關鍵字: | Sargassum;Litopenaeus vannamei;Phagocytosis;Growth performance;Innate immunity;Gene expression | 公開日期: | 七月-2020 | 出版社: | Elsevier | 卷: | 102 | 起(迄)頁: | 276-285 | 來源出版物: | Fish & Shellfish Immunology | 摘要: | The white shrimp Litopenaeus vannamei is one of the most commercially important aquatic species. However, intensive farming to meet economic demands has been linked to animal stress and subsequent disease outbreaks. In this study, we explore the immunomodulatory effects of Sargassum horneri hot-water extract (SHE) on the immune parameters of L. vannamei. Hemocytes incubated in vitro with 10 mg/ml of SHE showed the highest response in phenoloxidase (PO) activity and reactive oxygen species production. In the in vivo trials, shrimp were fed diets containing 0 (control), 2.5 (SHE 2.5), 5.0 g (SHE 5.0), and 10 g (SHE10.0) of lyophilized SHE per kg feed for four weeks, after which immune parameters were measured. Group SHE10.0 had the highest total hemocyte count, reactive oxygen species production, and phagocytic rate during the 4-week feeding period, followed by groups SHE5.0 and SHE2.5. However, group SHE5.0 showed a better growth performance among all examined groups after four weeks of rearing. Furthermore, gene expression analysis revealed that L. vannamei fed diets containing 0.5% SHE over 28 days showed significant modulation of 11 immune-related genes, including prophenoloxidase I, prophenoloxidase II, peroxinectin, α2macroglobulin, clotting protein, lysozyme, superoxide dismutase, glutathione peroxidase, penaiedin2-4, and crustin. Combined, these results show that SHE is a functional feed additive that can be applied orally to enhance innate immunity and growth performance of white shrimps. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/6080 | ISSN: | 1050-4648 | DOI: | 10.1016/j.fsi.2020.04.049 |
顯示於: | 水產養殖學系 |
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