Researchers found a connection between neuropeptides regulating food intake in jellyfish and fruit flies, despite 600 million years of divergence. The GLWamide/MIP system controlling feeding behavior was found to be functionally conserved between the two species, revealing deep evolutionary origins
Researchers from Tohoku University’s Graduate School of Life Sciences have discovered a connection between the neuropeptides that regulate food intake in jellyfish and fruit flies, despite their 600 million years of divergence. The team, led by Hiromu Tanimoto and Vladimiros Thoma, found that GLWamide in Cladonema jellyfish and myoinhibitory peptide in fruit flies share structural similarities, suggesting an evolutionary link.
“First, to understand mechanisms underlying feeding regulation, we compared the gene expression profiles in hungry and fed jellyfish,” said Tanimoto. “The feeding state changed the expression levels of many genes, including some that encode neuropeptides. By synthesizing and testing these neuropeptides, we found five that reduced feeding in hungry jellyfish.”
Yet the researchers’ quest to explore the evolutionary significance of this finding did not stop there. Instead, they looked to other species. Fruit flies’ feeding patterns are regulated by the neuropeptide myoinhibitory peptide . Fruit flies lacking MIP eat more food, eventually becoming obese. Interestingly, MIP and GLWamide share similarities in their structures, suggesting they are related through evolution.
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