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- W4210556191 abstract "Advanced age is one of the leading risk factors for vision loss and eye disease. Photoreceptors are the primary sensory neurons of the eye. The extended photoreceptor cell lifespan, in addition to its high metabolic needs due to phototransduction, makes it critical for these neurons to continually respond to the stresses associated with aging by mounting an appropriate gene expression response. Here, we sought to untangle the more general neuronal age-dependent transcriptional signature of photoreceptors with that induced by light stress. To do this, we aged flies or exposed them to various durations of blue light, followed by photoreceptor nuclei-specific transcriptome profiling. Using this approach, we identified genes that are both common and uniquely regulated by aging and light induced stress. Whereas both age and blue light induce expression of DNA repair genes and a neuronal-specific signature of death, both conditions result in downregulation of phototransduction. Interestingly, blue light uniquely induced genes that directly counteract the overactivation of the phototransduction signaling cascade. Lastly, unique gene expression changes in aging photoreceptors included the downregulation of genes involved in membrane potential homeostasis and mitochondrial function, as well as the upregulation of immune response genes. We propose that light stress contributes to the aging transcriptome of photoreceptors, but that there are also other environmental or intrinsic factors involved in age-associated photoreceptor gene expression signatures." @default.
- W4210556191 created "2022-02-08" @default.
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- W4210556191 date "2022-01-29" @default.
- W4210556191 modified "2023-09-26" @default.
- W4210556191 title "Aging and Light Stress Result in Overlapping and Unique Gene Expression Changes in Photoreceptors" @default.
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- W4210556191 doi "https://doi.org/10.3390/genes13020264" @default.
- W4210556191 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35205309" @default.
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