Abstract
Limb autotomy and regeneration represent distinctive responses of crustaceans to environmental stress. Glucose metabolism plays a pivotal role in energy generation for tissue development and regeneration across various species. However, the relationship between glucose metabolism and tissue regeneration in crustaceans remains elusive. Therefore, this study is aimed at analyzing the alterations of glucose metabolic profile during limb autotomy and regeneration in Eriocheir sinensis, while also evaluating the effects of carbohydrate supplementation on limb regeneration. The results demonstrated that limb autotomy triggered a metabolic profile adaption at the early stage of regeneration. Hemolymph glucose levels were elevated, and multiple glucose catabolic pathways were enhanced in the hepatopancreas. Additionally, glucose and ATP levels in the regenerative limb were upregulated, along with increased expression of glucose transporters. Furthermore, the gene expression and activity of enzymes involved in gluconeogenesis were repressed in the hepatopancreas. These findings indicate that limb regeneration triggers metabolic profile adaptations to meet the elevated energy requirements. Moreover, the study observed that supplementation with corn starch enhanced limb regeneration capacity by promoting wound healing and blastema growth. Interestingly, dietary carbohydrate addition influenced limb regeneration by stimulating gluconeogenesis rather than glycolysis in the regenerative limb. Thus, these results underscore the adaptation of glucose metabolism during limb autotomy and regeneration, highlighting its essential role in the limb regeneration process of E. sinensis.
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Funding
This work was supported by the National Natural Science Foundation of China (81903776) and the National Key R&D Program of China (2018YFD0901301).
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JL designed the experiment, performed the experiments, and revised the manuscript. XL performed the experiments, analyzed the data, and prepared all figures. SF participated in the enzyme activity assay and qRT-PCR analysis. YM participated in the enzyme activity analysis. XL participated in the feed trail and sample collection. XZ participated in sample collection and analysis. GL raised the crabs and participated the feed trail. JS supervised the study and provided funding. All authors reviewed and approved the final manuscript.
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Li, J., Li, X., Fu, S. et al. Adaptation of Glucose Metabolism to Limb Autotomy and Regeneration in the Chinese Mitten Crab. Mar Biotechnol 26, 205–213 (2024). https://doi.org/10.1007/s10126-024-10290-3
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DOI: https://doi.org/10.1007/s10126-024-10290-3