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Adverse impact of female reproductive signaling on age-dependent neurodegeneration after mild head trauma in Drosophila
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Adverse impact of female reproductive signaling on age-dependent neurodegeneration after mild head trauma in Drosophila
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Adverse impact of female reproductive signaling on age-dependent neurodegeneration after mild head trauma in Drosophila
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Journal Article
Adverse impact of female reproductive signaling on age-dependent neurodegeneration after mild head trauma in Drosophila
2024
Overview
Environmental insults, including mild head trauma, significantly increase the risk of neurodegeneration. However, it remains challenging to establish a causative connection between early-life exposure to mild head trauma and late-life emergence of neurodegenerative deficits, nor do we know how sex and age compound the outcome. Using a Drosophila model, we demonstrate that exposure to mild head trauma causes neurodegenerative conditions that emerge late in life and disproportionately affect females. Increasing age-at-injury further exacerbates this effect in a sexually dimorphic manner. We further identify sex peptide signaling as a key factor in female susceptibility to post-injury brain deficits. RNA sequencing highlights a reduction in innate immune defense transcripts specifically in mated females during late life. Our findings establish a causal relationship between early head trauma and late-life neurodegeneration, emphasizing sex differences in injury response and the impact of age-at-injury. Finally, our findings reveal that reproductive signaling adversely impacts female response to mild head insults and elevates vulnerability to late-life neurodegeneration.
Publisher
eLife Science Publications, Ltd,eLife Sciences Publications Ltd
