Using the zebrafish as a model organism, the team led by Professor Mosimann observed a unique type of fibroblast-like cell migrating to specific developing fins. These cells have been found to be associated with both the ventral fin (abdominal equivalent) and the pectoral fin (human equivalent of the arms). This discovery provides a link between competing theories for the evolution of paired appendages.
Using the latest techniques to monitor cell fate during development, the researchers found that these unusual fibroblasts originate from the lateral plate mesoderm, which is the source of the development of various organs, including the heart, blood vessels, kidneys, connective tissues. tissue and limbs. Their results support the dual origin theory, which proposes a relationship between paired appendages and unpaired lateral fins.
While the study adds to the ongoing debate, it does not definitively resolve the issue. However, the study offers valuable molecular and genetic information about limb evolution.
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Source: Ferra
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