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Pharyngeal pumping rate does not reflect lifespan extension in C. elegans transgenerational longevity mutants
Epigenetic modifications must be reprogrammed with each new generation. In Caenorhabditis elegans , defects in histone methylation reprogramming allow for the transgenerational acquisition of longevity. For example, mutations in the putative H3K9 demethylase JHDM-1 extend lifespan after six to ten g...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Caltech Library
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9923420/ https://www.ncbi.nlm.nih.gov/pubmed/36793895 http://dx.doi.org/10.17912/micropub.biology.000719 |
Sumario: | Epigenetic modifications must be reprogrammed with each new generation. In Caenorhabditis elegans , defects in histone methylation reprogramming allow for the transgenerational acquisition of longevity. For example, mutations in the putative H3K9 demethylase JHDM-1 extend lifespan after six to ten generations. We noticed that long-lived jhdm-1 mutants appear healthier than wild-type animals from the same generation. To quantify health, we compared the common metric of pharyngeal pumping rate at specific adult ages between early-gen populations with normal lifespans and late-gen populations with long lifespans. Longevity did not affect pumping rate, but long-lived mutants stop pumping at a younger age, suggesting a possible conservation of energy to extend lifespan. |
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