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  • Cao, Hao, et al. (författare)
  • Dibutyl phthalate exposure disrupts conserved circadian rhythm signaling systems in Drosophila
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Due to their common use as industrial plasticizers, agents in cosmetics and inclusion in skin care products, people are constantly exposed to phthalate xenobiotics. Although much research has focused on their ability to disrupt endocrine signaling, leading to developmental, reproductive and metabolic defects, how phthalates interfere with these biological functions is still unclear. Using whole transcriptome analysis, we demonstrate that exposing the genetically-tractable model system Drosophila melanogaster to the xenobiotic Dibutyl Pthalate (DBP) throughout development interferes with neuronal systems associated with vision and circadian rhythm. Of note, while DBP did not influence with eye development, it inhibited the expression of signaling systems regulating vision, including Rhodopsin 5 (Rh5) and Rhodopsin 6 (Rh6), two light-sensing G-protein coupled receptors involved in the daily resetting of circadian rhythm. Furthermore, DBP influenced the expression of genes central to circadian rhythm regulation, including vrille (vri, human NFIL3), timeless (tim, human TIMELESS), period (per, human PER3) and Pigment-dispersing factor (Pdf). Finally, we demonstrate that DBP disrupts circadian rhythm by interacting with the evolutionarily conserved nuclear receptor Hormone receptor-like in 38 (Hr38, human NR4A2), which in turn regulates Pdf expression. Our results are the first to provide comprehensive evidence that DBP interferes with the circadian rhythm system.
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