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Shu T, Chen Y, Xiao K, Huang H, Jia J, Yu Z, Jiang W, Yang J. Effects of short-term water velocity stimulation on the biochemical and transcriptional responses of grass carp ( Ctenopharyngodon idellus). Front Physiol 2023; 14:1248999. [PMID: 37719458 PMCID: PMC10501314 DOI: 10.3389/fphys.2023.1248999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 08/14/2023] [Indexed: 09/19/2023] Open
Abstract
Since 2011, ecological operation trials of the Three Gorges Reservoir (TGR) have been continuously conducted to improve the spawning quantity of the four major Chinese carp species below the Gezhouba Dam. In particular, exploring the effects of short-term water velocity stimulation on ovarian development in grass carp (Ctenopharyngodon idellus) is essential to understand the response of natural reproduction to ecological flows. We performed ovary histology analysis and biochemical assays among individuals with or without stimulation by running water. Although there were no obvious effects on the ovarian development characteristics of grass carp under short-term water velocity stimulation, estradiol, progesterone, follicle-stimulating hormone (FSH), and triiodothyronine (T3) concentrations were elevated. Then, we further explored the ovarian development of grass carp under short-term water velocity stimulation by RNA sequencing of ovarian tissues. In total, 221 and 741 genes were up- or downregulated under short-term water velocity stimulation, respectively, compared to the control group. The majority of differentially expressed genes (DEGs) were enriched in pathways including ABC transporters, cytokine-cytokine receptor interaction, ECM-receptor interaction, and steroid hormone biosynthesis. Important genes including gpr4, vtg1, C-type lectin, hsd17b1, cyp19a1a, cyp17a1, and rdh12 that are involved in ovarian development were regulated. Our results provide new insights and reveal potential regulatory genes and pathways involved in the ovarian development of grass carp under short-term water velocity stimulation, which may be beneficial when devising further ecological regulation strategies.
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Affiliation(s)
- Tingting Shu
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang, China
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang, China
| | - Yan Chen
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang, China
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang, China
- State Key Laboratory for Cellular Stress Biology, Innovation Centre for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, China
| | - Kan Xiao
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang, China
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang, China
| | - Hongtao Huang
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang, China
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang, China
| | - Jingyi Jia
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Zhaoxi Yu
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang, China
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang, China
| | - Wei Jiang
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang, China
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang, China
| | - Jing Yang
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang, China
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang, China
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Lai X, Peng S, Feng J, Zou P, Wang Y. Immune function modulation during artificial ovarian maturation in Japanese eel (Anguilla japonica): A transcriptome profiling approach. FISH & SHELLFISH IMMUNOLOGY 2022; 131:662-671. [PMID: 36341870 DOI: 10.1016/j.fsi.2022.10.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 10/10/2022] [Accepted: 10/23/2022] [Indexed: 06/16/2023]
Abstract
The Japanese eel (Anguilla japonica) experiences dramatic internal and external environmental changes during its transoceanic reproductive migrations. Here, we assess immune function changes in the primary and secondary immune organs (head kidney and spleen) of A. japonica during artificial ovarian maturation at the previtellogenic (PV), midvitellogenic (MV), and ovulating (OV) stages by transcriptome analyses. Stress responses were also assessed by determining the serum concentrations of lysozyme, alkaline phosphatase, acid phosphatase, total antioxidant capacity, and superoxide dismutase. Our results showed that together with increased serum 17β-estrogen and testosterone, lysozyme activity and antioxidant capacity were suppressed during artificial ovarian maturation. Comparisons across these developmental stages identified 60 (head kidney) and 36 (spleen) differentially expressed genes associated with the immune system. Genes related to the key activation markers of innate immune function, such as CXCL10, CXCL11, CCL20, HSP90B, MMP9, and MMP13, were upregulated and significantly enriched in the interleukin-17 signaling pathway. Adaptive immune function-related genes (IGM and MHC1) were upregulated in the head kidney from PV to MV, and their levels increased thereafter in the spleen. Moreover, a correlation between Pax5 expression and IGM expression in the spleen of MV (IGM+/Pax5+) and OV (IGM++/Pax5-) stage suggests that adaptive immune function was enhanced during ovarian maturation. To our knowledge, the present study is the first to describe transcriptome profiling of immune organs during ovarian maturation in teleost. Our findings suggest that the interleukin-17 pathway and IgM may play important roles in spawning.
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Affiliation(s)
- Xiaojian Lai
- Fisheries College, Jimei University, Xiamen, 361021, China; Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education, PR China, Xiamen, 361021, China.
| | - Shuai Peng
- Fisheries College, Jimei University, Xiamen, 361021, China; Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education, PR China, Xiamen, 361021, China
| | - Jianjun Feng
- Fisheries College, Jimei University, Xiamen, 361021, China; Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education, PR China, Xiamen, 361021, China
| | - Pengfei Zou
- Fisheries College, Jimei University, Xiamen, 361021, China
| | - Yilei Wang
- Fisheries College, Jimei University, Xiamen, 361021, China.
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