Abstract
Developing blood vessels from the existing vasculature is vital for the growth of the organism, as well as for systematic wound healing and the repair process. In this study, we investigated the role of angiogenesis during the regeneration process in the earthworm, Eudrilus eugeniae, animal model. Briefly, the morphological examination of blood vessels in juvenile and mature worms is documented, along with the development of new blood vessels in regenerating blastema. However, in vivo and in vitro experiments with juvenile worms revealed that geraniol retards blastemal regeneration growth with undeveloped blood vessels, as compared to the control. The results of qRT-PCR, western blotting, and immunohistochemistry confirmed a reduced expression of VEGFR2 and WNT5A in the day 3 regenerating blastema of geraniol-treated worms, as compared to the control. We conclude that geraniol acts as a potent natural inhibitor of angiogenesis, thereby retarding the regeneration process in earthworms. In addition, for studying angiogenesis and screening effective angiogenesis inhibitors as drug candidates, the earthworm is an ambient animal model system.
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Acknowledgements
The authors express gratitude to “Sathyabama Institute of Science and Technology, Chennai, Tamilnadu, India” for proving all necessary support to carry out the research work. In addition, the authors thank the funding agency “Department of Biotechnology (Ref. No. BT/IN/Indo-US/Foldscopes/39/2015), New Delhi, India,” for providing funding support.
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Ganesan, M., Christyraj, J.R.S.S., Venkatachalam, S. et al. Understanding the process of angiogenesis in regenerating earthworm. In Vitro Cell.Dev.Biol.-Animal 59, 467–478 (2023). https://doi.org/10.1007/s11626-023-00782-2
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DOI: https://doi.org/10.1007/s11626-023-00782-2