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Okamura Y, Morimoto N, Ikeda D, Mizusawa N, Watabe S, Miyanishi H, Saeki Y, Takeyama H, Aoki T, Kinoshita M, Kono T, Sakai M, Hikima JI. Interleukin-17A/F1 Deficiency Reduces Antimicrobial Gene Expression and Contributes to Microbiome Alterations in Intestines of Japanese medaka ( Oryzias latipes). Front Immunol 2020; 11:425. [PMID: 32256492 PMCID: PMC7092794 DOI: 10.3389/fimmu.2020.00425] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 02/25/2020] [Indexed: 01/09/2023] Open
Abstract
In mammals, interleukin (IL)-17A and F are hallmark inflammatory cytokines that play key roles in protection against infection and intestinal mucosal immunity. In the gastrointestinal tract (GI), the induction of antimicrobial peptide (AMP) production via Paneth cells is a fundamental role of IL-17A and F in maintaining homeostasis of the GI microbiome and health. Although mammalian IL-17A and F homologs (referred to as IL-17A/F1-3) have been identified in several fish species, their function in the intestine is poorly understood. Additionally, the fish intestine lacks Paneth cells, and its GI structure is very different from that of mammals. Therefore, the GI microbiome modulatory mechanism via IL-17A/F genes has not been fully elucidated. In this study, Japanese medaka (Oryzias latipes) were used as a teleost model, and IL-17A/F1-knockout (IL-17A/F1-KO) medaka were established using the CRISPR/Cas9 genome editing technique. Furthermore, two IL-17A/F1-deficient medaka strains were generated, including one strain containing a 7-bp deletion (-7) and another with an 11-bp addition (+11). After establishing F2 homozygous KO medaka, transcriptome analysis (RNA-seq) was conducted to elucidate IL-17A/F1-dependent gene induction in the intestine. Results of RNA-seq and real-time PCR (qPCR) demonstrated down-regulation of immune-related genes, including interleukin-1β (IL-1β), complement 1q subunit C (C1qc), transferrin a (Tfa), and G-type lysozyme (LyzG), in IL-17A/F1-KO medaka. Interestingly, protein and lipid digestive enzyme genes, including phospholipase A2, group IB (pla2g1b), and elastase-1-like (CELA1), were also downregulated in the intestines of IL-17A/F1-KO medaka. Furthermore, to reveal the influence of these downregulated genes on the gut microbiome in IL-17A/F1-KO, 16S rRNA-based metagenomic sequencing analysis was conducted to analyze the microbiome constitution. Under a non-exposed state, the intestinal microbiome of IL-17A/F1-KO medaka differed at the phylum level from wild-type, with significantly higher levels of Verrucomicrobia and Planctomycetes. Additionally, at the operational taxonomic unit (OTU) level of the human and fish pathogens, the Enterobacteriaceae Plesiomonas shigelloides was the dominant species in IL-17A/F1-KO medaka. These findings suggest that IL-17A/F1 is involved in the maintenance of a healthy gut microbiome.
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Affiliation(s)
- Yo Okamura
- Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki, Miyazaki, Japan
| | - Natsuki Morimoto
- Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki, Miyazaki, Japan
| | - Daisuke Ikeda
- School of Marine Biosciences, Kitasato University, Sagamihara, Japan
| | - Nanami Mizusawa
- School of Marine Biosciences, Kitasato University, Sagamihara, Japan
| | - Shugo Watabe
- School of Marine Biosciences, Kitasato University, Sagamihara, Japan
| | - Hiroshi Miyanishi
- Department of Marine Biology and Environmental Science, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Yuichi Saeki
- Department of Biochemistry and Applied Bioscience, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Haruko Takeyama
- Department of Life Science and Medical Bioscience, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Takashi Aoki
- Integrated Institute for Regulatory Science, Research Organization for Nao and Life Innovation, Waseda University, Tokyo, Japan
| | - Masato Kinoshita
- Division of Applied Bioscience, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Tomoya Kono
- Department of Biochemistry and Applied Bioscience, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Masahiro Sakai
- Department of Biochemistry and Applied Bioscience, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Jun-ichi Hikima
- Department of Biochemistry and Applied Bioscience, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
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Ziková A, Trubiroha A, Wiegand C, Wuertz S, Rennert B, Pflugmacher S, Kopp R, Mareš J, Spurný P, Kloas W. Impact of microcystin containing diets on physiological performance of Nile tilapia (Oreochromis niloticus) concerning detoxification. ACTA ACUST UNITED AC 2010; 12:2276-81. [DOI: 10.1039/c0em00246a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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