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Keywords = hypaxial muscle progenitors

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22 pages, 5031 KiB  
Article
Purine Biosynthesis Pathways Are Required for Myogenesis in Xenopus laevis
by Maëlle Duperray, Fanny Hardet, Elodie Henriet, Christelle Saint-Marc, Eric Boué-Grabot, Bertrand Daignan-Fornier, Karine Massé and Benoît Pinson
Cells 2023, 12(19), 2379; https://doi.org/10.3390/cells12192379 - 28 Sep 2023
Cited by 2 | Viewed by 2439
Abstract
Purines are required for fundamental biological processes and alterations in their metabolism lead to severe genetic diseases associated with developmental defects whose etiology remains unclear. Here, we studied the developmental requirements for purine metabolism using the amphibian Xenopus laevis as a vertebrate model. [...] Read more.
Purines are required for fundamental biological processes and alterations in their metabolism lead to severe genetic diseases associated with developmental defects whose etiology remains unclear. Here, we studied the developmental requirements for purine metabolism using the amphibian Xenopus laevis as a vertebrate model. We provide the first functional characterization of purine pathway genes and show that these genes are mainly expressed in nervous and muscular embryonic tissues. Morphants were generated to decipher the functions of these genes, with a focus on the adenylosuccinate lyase (ADSL), which is an enzyme required for both salvage and de novo purine pathways. adsl.L knockdown led to a severe reduction in the expression of the myogenic regulatory factors (MRFs: Myod1, Myf5 and Myogenin), thus resulting in defects in somite formation and, at later stages, the development and/or migration of both craniofacial and hypaxial muscle progenitors. The reduced expressions of hprt1.L and ppat, which are two genes specific to the salvage and de novo pathways, respectively, resulted in similar alterations. In conclusion, our data show for the first time that de novo and recycling purine pathways are essential for myogenesis and highlight new mechanisms in the regulation of MRF gene expression. Full article
(This article belongs to the Topic Animal Models of Human Disease)
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