PMID- 35154103 OWN - NLM STAT- MEDLINE DCOM- 20220303 LR - 20220303 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 13 DP - 2022 TI - Molecular Identification of Nocardia seriolae and Comparative Analysis of Spleen Transcriptomes of Hybrid Snakehead (Channa maculata Female x Channa argus Male) With Nocardiosis Disease. PG - 778915 LID - 10.3389/fimmu.2022.778915 [doi] LID - 778915 AB - Hybrid snakehead (Channa maculata female x Channa argus male) is a new freshwater aquaculture fish species in southern China. During intensive aquaculture, hybrid snakeheads are often infected by Nocardia seriolae. In this study, hybrid snakehead infected suspiciously by N. seriolae in an artificial breeding pond were examined. Diseased hybrid snakeheads swam slowly without food intake, and the clinical symptoms included skin wound, anal swelling and ascites, and white granulomatous in liver, spleen, and kidney of fish. Through bacterial isolation, 16S rDNA sequencing, fluorescence in situ hybridization (FISH) and artificial infection experiment, the pathogen was identified as N. seriolae. Furthermore, the spleen samples from diseased and healthy male hybrid snakeheads in the same pond were used for RNA-Seq analysis. A total of 3,512 unique transcripts (unigenes) were identified as differentially expressed genes (DEGs), and 1,886 of them were up-regulated in diseased fish. The expression patterns of 20 DEGs were verified by quantitative polymerase chain reaction (qPCR). Several immune-related pathways and many immune-related genes were identified. qPCR results showed that the expression patterns of immune-related genes in the liver and kidney of diseased fish were comparable to that in the spleen. This study provides deep-sequencing data of hybrid snakehead spleen and will help understand the immune response of hybrid snakehead to N. seriolae. It is also helpful for the biomarker screening of fish-borne Nocardia spp. and the breeding of nocardiosis-resistant fish species. CI - Copyright (c) 2022 Zhang, Zhang, Dong and Wang. FAU - Zhang, Ning AU - Zhang N AD - Fisheries College, Guangdong Ocean University, Zhanjiang, China. FAU - Zhang, Hairui AU - Zhang H AD - Zhongshan Ronghai Aquaculture Co. Ltd., Zhongshan, China. FAU - Dong, Zhongdian AU - Dong Z AD - Fisheries College, Guangdong Ocean University, Zhanjiang, China. FAU - Wang, Wei AU - Wang W AD - Fisheries College, Guangdong Ocean University, Zhanjiang, China. AD - Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation, Beibu Gulf University, Qinzhou, China. AD - Guangdong Provincial Key Lab of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Guangdong Ocean University, Zhanjiang, China. LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20220127 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 RN - 0 (Bacterial Proteins) RN - Nocardia seriolae SB - IM MH - Animals MH - Aquaculture MH - Bacterial Proteins/immunology MH - China MH - Female MH - Fish Diseases/immunology/microbiology MH - Fishes/*genetics/immunology MH - In Situ Hybridization, Fluorescence MH - Male MH - Nocardia/classification/*genetics/immunology/*isolation & purification MH - Nocardia Infections/*veterinary MH - *Spleen MH - *Transcriptome PMC - PMC8828968 OTO - NOTNLM OT - Nocardia seriolae OT - RNA-seq OT - fish OT - hybrid snakehead OT - immune response COIS- Author HZ is employed by Zhongshan Ronghai aquaculture Co. Ltd. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2022/02/15 06:00 MHDA- 2022/03/04 06:00 PMCR- 2022/01/01 CRDT- 2022/02/14 05:30 PHST- 2021/09/17 00:00 [received] PHST- 2022/01/10 00:00 [accepted] PHST- 2022/02/14 05:30 [entrez] PHST- 2022/02/15 06:00 [pubmed] PHST- 2022/03/04 06:00 [medline] PHST- 2022/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2022.778915 [doi] PST - epublish SO - Front Immunol. 2022 Jan 27;13:778915. doi: 10.3389/fimmu.2022.778915. eCollection 2022.