文献类型: 外文期刊
作者: Wang, Lin 1 ; Zhang, Defeng 1 ; Xie, Jun 1 ; Chang, Ouqin 1 ; Wang, Qing 1 ; Shi, Cunbin 1 ; Zhao, Fei 1 ; Gong, Hua 1 ; Ren, Yan 1 ; Musa, Najiah 3 ; Lee, Kok Leong 3 ; Pan, Houjun 1 ;
作者机构: 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Key Lab Aquat Anim Immune Technol Guangdong Prov, Key Lab Fishery Drug Dev,Minist Agr & Rural Affair, Guangzhou 510380, Guangdong, Peoples R China
2.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
3.Univ Malaysia Terengganu, Fac Fisheries & Food Sci, Kuala Nerus 21030, Terengganu, Malaysia
4.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangzhou 510380, Peoples R China
关键词: Dactylogyrus lamellatus; Cetobacterium; Bacteroides; GPX; Grass carp
期刊名称:AQUACULTURE ( 影响因子:5.135; 五年影响因子:5.125 )
ISSN: 0044-8486
年卷期: 2023 年 562 卷
页码:
收录情况: SCI
摘要: The ectoparasites Dactylogyrus lamellatus usually infest fish gills and cause severe damage to the gill tissues of the host. However, whether the ectoparasites influence gut microbiota is still unknown. In this study, gut microbiota combined with histopathological characteristics, biochemical parameters, and relative expression of immune -related genes were analyzed in grass carp severely infected (SI), mildly infected (MI) and uninfected (UI) with D. lamellatus. Deep amplicon sequencing of the 16S rRNA gene of the gut microbiota revealed that the diversity of the SI group was significantly reduced than UI group (p < 0.05). In parallel with the increased loads of D. lamellatus, the relative abundance of Cetobacterium increased, and that of Bacteroides decreased. Antioxidant indices of the glutathione peroxidase (GPX) in the infected groups were significantly higher than those in the UI group (p < 0.05). The expression levels of several immune-related genes encoding toll-like receptor 3 (TLR3), myeloid differentiation factor 88 (MyD88), major histocompatibility complex II (MHCII), and immunoglobulin M (IgM) were relatively increased the degree of infection in grass carp tissues. Meanwhile, the histopathological characteristics show a large number of immune cells infiltrated in the mucosal and submucosal layers in in-testine. It indicates that D. lamellatus infection stimulated both the innate and adaptive immune responses. Our data demonstrated that ectoparasites D. lamellatus infection on the gills resulted in a gut microbiota shift, his-topathological changes, and immune responses in the grass carp. Furthermore, ectoparasite- microbiota-host interactions indicate that fish ectoparasites probably have remote "talk" mechanisms with host intestinal mi-crobes. This is the first study of ectoparasites on fish gills affecting the gut microbiota in grass carp from far distance away, which is beneficial for understanding the relationships between parasites, gut microbiota, and host and for the control of parasitic diseases in fish.
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