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Phenotypic characterization of PNPase knockdown in C. elegans

The multifunctional exoribonuclease protein PNPase is implicated as a potential target for cancer therapy as well as causing mitochondrial disorders in humans, but there has yet to be a whole animal knockdown model created. In this study, C. elegans was used to investigate the effect of knocking down pnpt-1, the gene that encodes PNPase. It was discovered that pnpt-1 knockdown significantly extends lifespan via an increase in superoxide production similar to other known mitochondrial lifespan extension pathways. Additionally, mitochondrial networks, size and respiration are affected indication of other mitochondrial dysfunction..
PNPase is also known to transport small RNAs into the mitochondria which in turn can affect mitochondria RNA splicing and translation of proteins involved in respiration. Further investigation showed a significant accumulation of polycistronic mitochondrial transcripts in knockdown animals. Lastly, this model has shown that PNPase knockdown is functionally comparable across species and is a viable model for future studies.

Identiferoai:union.ndltd.org:vcu.edu/oai:scholarscompass.vcu.edu:etd-4799
Date01 January 2015
CreatorsLambert, Laura A
PublisherVCU Scholars Compass
Source SetsVirginia Commonwealth University
Detected LanguageEnglish
Typetext
Formatapplication/pdf
SourceTheses and Dissertations
Rights© The Author

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