The prdm gene apoptix antagonizes programmed cell death in tribolium

Previous studies in holometabolous insects have shown that programmed and cell proliferation play important roles in insect metamorphosis. To elucidate the function of the newly identified Tribolium Prdm gene Apoptix (Apox) I performed a detailed analysis of Apox knockdown effects in the embryo, the pupa and the adult eye. My results revealed that Apox is required for the survival of retinal tissue after onset of differentiation and also generally in tissues which experience high amounts of proliferation and differentiation during pupal development. Further, combinatorial knockdown of Apox and initiator caspases produced evidence that Apox specifically protects from programmed cell death in Tribolium development. My results characterize a novel regulator of programmed cell death, which is highly conserved in arthropods but was lost during dipteran evolution

Food-derived sensory cues modulate longevity via distinct neuroendocrine insulin-like peptides

Environmental fluctuations influence organismal aging by affecting various regulatory systems. One such system involves sensory neurons, which affect life span in many species. However, how sensory neurons coordinate organismal aging in response to changes in environmental signals remains elusive. Here, we found that a subset of sensory neurons shortens Caenorhabditis elegans' life span by differentially regulating the expression of a specific insulin-like peptide (ILP), INS-6. Notably, treatment with food-derived cues or optogenetic activation of sensory neurons significantly increases ins-6 expression and decreases life span. INS-6 in turn relays the longevity signals to nonneuronal tissues by decreasing the activity of the transcription factor DAF-16/FOXO. Together, our study delineates a mechanism through which environmental sensory cues regulate aging rates by modulating the activities of specific sensory neurons and ILPs.1186Ysciescopu

Food Smell and Taste Shorten C. elegans Lifespan via Inducing Distinct Neuroendocrine Insulin-like Peptides

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Olfaction and Gustation Shorten Lifespan via Regulation of Distinct Neuroendocrine Insulin-like Peptides in C. elegans

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Sensory food cue shorten C. elegans lifespan via inducing neuroendocrine INS-6/insulin-like peptide

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Food-derived sensory cues modulate longevity via distinct neuroendocrine insulin-like peptides

Environmental fluctuations influence organismal aging by affecting various regulatory systems. One such system involves sensory neurons, which affect life span in many species. However, how sensory neurons coordinate organismal aging in response to changes in environmental signals remains elusive. Here, we found that a subset of sensory neurons shortens Caenorhabditis elegans’ life span by differentially regulating the expression of a specific insulin-like peptide (ILP), INS-6. Notably, treatment with food-derived cues or optogenetic activation of sensory neurons significantly increases ins-6 expression and decreases life span. INS-6 in turn relays the longevity signals to nonneuronal tissues by decreasing the activity of the transcription factor DAF-16/FOXO. Together, our study delineates a mechanism through which environmental sensory cues regulate aging rates by modulating the activities of specific sensory neurons and ILPs. © 2016 Artan et al.1