*Result*: Transcriptome analysis identifies key regulatory genes and temporal expression dynamics during embryonic development in the Japanese eel (Anguilla japonica).

Title:
Transcriptome analysis identifies key regulatory genes and temporal expression dynamics during embryonic development in the Japanese eel (Anguilla japonica).
Authors:
Zhong Z; State Key Laboratory of Mariculture BreedingFisheries College, Jimei University, Xiamen, 361021, China.; College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005, China., Luo D; State Key Laboratory of Mariculture BreedingFisheries College, Jimei University, Xiamen, 361021, China.; Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College, Jimei University, Xiamen, 361021, China., Lu Y; State Key Laboratory of Mariculture BreedingFisheries College, Jimei University, Xiamen, 361021, China.; Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College, Jimei University, Xiamen, 361021, China., Chen Z; State Key Laboratory of Mariculture BreedingFisheries College, Jimei University, Xiamen, 361021, China.; Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College, Jimei University, Xiamen, 361021, China., Xi N; State Key Laboratory of Mariculture BreedingFisheries College, Jimei University, Xiamen, 361021, China.; Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College, Jimei University, Xiamen, 361021, China., Shi S; State Key Laboratory of Mariculture BreedingFisheries College, Jimei University, Xiamen, 361021, China.; Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College, Jimei University, Xiamen, 361021, China., Chen J; State Key Laboratory of Mariculture BreedingFisheries College, Jimei University, Xiamen, 361021, China.; Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College, Jimei University, Xiamen, 361021, China., Jiang Y; State Key Laboratory of Mariculture BreedingFisheries College, Jimei University, Xiamen, 361021, China. yhjiang1974@jmu.edu.cn.; Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College, Jimei University, Xiamen, 361021, China. yhjiang1974@jmu.edu.cn.
Source:
Molecular genetics and genomics : MGG [Mol Genet Genomics] 2026 Mar 06; Vol. 301 (1). Date of Electronic Publication: 2026 Mar 06.
Publication Type:
Journal Article
Language:
English
Journal Info:
Publisher: Springer-Verlag Country of Publication: Germany NLM ID: 101093320 Publication Model: Electronic Cited Medium: Internet ISSN: 1617-4623 (Electronic) Linking ISSN: 16174623 NLM ISO Abbreviation: Mol Genet Genomics Subsets: MEDLINE
Imprint Name(s):
Original Publication: Berlin : Springer-Verlag, c2001-
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Grant Information:
2024YFD2401002 National Key R&D Program of China; 42476103 National Natural Science Foundation of China; 2024J01704 Natural Science Foundation of Fujian Province; 3502Z202473056 Natural Science Foundation of Xiamen Municipality
Contributed Indexing:
Keywords: Anguilla japonica; Differentially expressed genes; Embryonic development; Gene regulatory network; Transcriptome analysis
Substance Nomenclature:
0 (Fish Proteins)
Entry Date(s):
Date Created: 20260305 Date Completed: 20260307 Latest Revision: 20260307
Update Code:
20260308
DOI:
10.1007/s00438-026-02367-6
PMID:
41787119
Database:
MEDLINE

*Further Information*

*The Japanese eel (Anguilla japonica), a commercially important species, has experienced severe population declines in the wild, underscoring the urgent need to improve artificial breeding techniques. However, the complexity of embryonic development and the limited understanding of its molecular regulatory mechanisms have constrained progress in artificial reproduction. To elucidate the dynamics of gene expression during early development, we conducted a comprehensive transcriptomic analysis of eight key embryonic stages using RNA-Seq. A total of 16,728 differentially expressed genes (DEGs) were identified, with the most pronounced pluripotency-related changes observed during the multicellular-blastula and differentiation-related changes in gastrula-embryo body transitions. Functional enrichment revealed distinct stage-specific pathways: early stages (multicellular) dominated by Notch and Wnt signaling, involved early developmental decisions; mid-stages (blastula to gastrula), with enriched pathways like Cell cycle, supporting rapid cell division; mid-late stages (embryo-body-formation to somite appearance) featured extracellular matrix receptor (ECM-receptor) interaction and focal adhesion, contributing to cell connectivity and tissue morphogenesis; and late stages (muscle-effect to newly-hatched-larvae) highlighted calcium signaling and metabolic pathways, providing signaling and energy support for organogenesis and functional maturation. Weighted gene co-expression network analysis (WGCNA) identified four stage-specific modules that correlated with developmental progression. Additionally, key members of the Sox, Hox, and Wnt transcription factor families were screened and found to exhibit dynamic, stage-specific expression patterns. These factors likely form a synergistic regulatory network that coordinates the entire developmental progression. Collectively, these findings delineate the molecular landscape of A. japonica embryogenesis and establish a crucial baseline transcriptomic resource that will facilitate future investigations into the molecular regulation of early development in this species.
(© 2026. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)*

*Declarations. Conflict of interest: The authors declare that they have no competing interests, either financial or personal, that could have influenced the work reported in this paper. All authors discussed the study design, agreed upon their respective roles, and consented to participate in the study. Declarations of generative AI use: The authors affirm that the entire creative process of this work, including ideation, literature review, data analysis, drafting, and revision, was conducted without the assistance of any generative artificial intelligence technologies.*