As dopamine is known to modulate locomotion, we also examined the effects of promL inhibition on the dopamine concentration and mRNA expression levels of tyrosine hydroxylase (TH) and DOPA decarboxylase (Ddc), the enzymes responsible for dopamine biosynthesis, in the heads of flies. Both promL mutants and pan-neuronal promL inhibition flies displayed reduced spontaneous locomotor activity. ![]() Because locomotion is required for food sourcing and ultimately the regulation of metabolism, we examined the function of promL in Drosophila locomotion. ![]() Previous studies have shown that the prominin-like ( promL) gene, an orthologue of mammalian CD133 in Drosophila, plays a role in glucose and lipid metabolism, body growth, and longevity. CD133, also known as prominin-1, was first identified as a biomarker of mammalian cancer and neural stem cells.
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