{"title":"Activation of gut microbiota-hif1α axis effectively restores resistance to Aeromonas veronii caused by improper administration of AiiO-AIO6.","authors":"Hongwei Yang, Rui Xia, Tsegay Teame, Delong Meng, Shenghui Li, Tiantian Wang, Qianwen Ding, Yuanyuan Yao, Xiaoqing Xu, Yalin Yang, Chao Ran, Yaqing Zhang, Shengkang Li, Benjamin Niemann, Le Luo Guan, Zhen Zhang, Zhigang Zhou","doi":"10.1016/j.tjnut.2025.03.007","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Feeding adult zebrafish a diet supplemented with quenching enzyme AiiO-AIO6 for 3 wk improved the growth performance and disease resistance. However, when the feeding period was extended to 8 wk, zebrafish's disease resistance to Aeromonas veronii decreased.</p><p><strong>Objective: </strong>We investigated the mechanisms of the reduced disease resistance of zebrafish induced by feeding on AiiO-AIO6 supplemented diet for a long-term (8 wk), and assessed the effectiveness of feed additives in restoring the low disease resistance.</p><p><strong>Methods: </strong>One-month-old (adult) zebrafish were fed with a basal diet and the basal diet supplemented with AiiO-AIO6 (10 U/g) for 8 wk (Expt. 1). Furthermore, zebrafish larvae model (Expt. 2) was developed and used to study the mechanisms how AiiO-AIO6 affected the disease resistance (Expt. 3). We also investigated the effectiveness of selected prebiotic tributyrin, β-glucan or mannan in activating gut microbiota-hif1α to restore the low disease resistance of adult zebrafish fed with AiiO-AIO6 for 8 wk (Expt. 4). Lastly, the effects of Bacillus subtilis in activating the gut microbiota-hif1α and improving the low disease resistance of zebrafish larvae induced by AiiO-AIO6 was examined (Expt. 5).</p><p><strong>Results: </strong>Feeding adult zebrafish with AiiO-AIO6 for 8 wk promoted the growth but disordered the gut microbiota and reduced disease resistance. Zebrafish larvae model confirmed that feeding AiiO-AIO6 for 2 d increased disease resistance, while 7 d decreased the resistance by suppressing hif1α. Using a germ-free zebrafish larvae model, we also demonstrated that AiiO-AIO6-induced gut microbiota mediated inhibition of hif1α. Furthermore, zebrafish fed on the AiiO-AIO6 containing diet supplement with tributyrin, β-glucan, mannan, or B. subtilis activated the gut microbiota-hif1α axis to reverse the low resistance caused by AiiO-AIO6.</p><p><strong>Conclusion: </strong>Activating the gut microbiota-hif1α axis has vital role in improving intestinal health and restores the low resistance to A. veronii caused by improper administration of dietary AiiO-AIO6 in zebrafish.</p>","PeriodicalId":16620,"journal":{"name":"Journal of Nutrition","volume":" ","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nutrition","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1016/j.tjnut.2025.03.007","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"NUTRITION & DIETETICS","Score":null,"Total":0}
引用次数: 0
Abstract
Background: Feeding adult zebrafish a diet supplemented with quenching enzyme AiiO-AIO6 for 3 wk improved the growth performance and disease resistance. However, when the feeding period was extended to 8 wk, zebrafish's disease resistance to Aeromonas veronii decreased.
Objective: We investigated the mechanisms of the reduced disease resistance of zebrafish induced by feeding on AiiO-AIO6 supplemented diet for a long-term (8 wk), and assessed the effectiveness of feed additives in restoring the low disease resistance.
Methods: One-month-old (adult) zebrafish were fed with a basal diet and the basal diet supplemented with AiiO-AIO6 (10 U/g) for 8 wk (Expt. 1). Furthermore, zebrafish larvae model (Expt. 2) was developed and used to study the mechanisms how AiiO-AIO6 affected the disease resistance (Expt. 3). We also investigated the effectiveness of selected prebiotic tributyrin, β-glucan or mannan in activating gut microbiota-hif1α to restore the low disease resistance of adult zebrafish fed with AiiO-AIO6 for 8 wk (Expt. 4). Lastly, the effects of Bacillus subtilis in activating the gut microbiota-hif1α and improving the low disease resistance of zebrafish larvae induced by AiiO-AIO6 was examined (Expt. 5).
Results: Feeding adult zebrafish with AiiO-AIO6 for 8 wk promoted the growth but disordered the gut microbiota and reduced disease resistance. Zebrafish larvae model confirmed that feeding AiiO-AIO6 for 2 d increased disease resistance, while 7 d decreased the resistance by suppressing hif1α. Using a germ-free zebrafish larvae model, we also demonstrated that AiiO-AIO6-induced gut microbiota mediated inhibition of hif1α. Furthermore, zebrafish fed on the AiiO-AIO6 containing diet supplement with tributyrin, β-glucan, mannan, or B. subtilis activated the gut microbiota-hif1α axis to reverse the low resistance caused by AiiO-AIO6.
Conclusion: Activating the gut microbiota-hif1α axis has vital role in improving intestinal health and restores the low resistance to A. veronii caused by improper administration of dietary AiiO-AIO6 in zebrafish.
期刊介绍:
The Journal of Nutrition (JN/J Nutr) publishes peer-reviewed original research papers covering all aspects of experimental nutrition in humans and other animal species; special articles such as reviews and biographies of prominent nutrition scientists; and issues, opinions, and commentaries on controversial issues in nutrition. Supplements are frequently published to provide extended discussion of topics of special interest.