jouvence, a new human H/ACA snoRNA involves in the control of cell proliferation and differentiation
El-Khoury, F.; Bignon, J.; MARTIN, J.-R.
Show abstract
Small nucleolar RNAs (snoRNAs) are non-coding RNAs conserved from archeobacteria to mammals. In humans, various snoRNAs have been associated with pathologies as well as with cancer. Recently in Drosophila, a new snoRNA named jouvence has been involved in lifespan. Since snoRNAs are well conserved through evolution, both structurally and functionally, jouvence orthologue has been identified in human, allowing hypothesizing that jouvence could display a similar function (increasing healthy lifespan) in human. Here, we report the characterization of the human snoRNA-jouvence, which was not yet annotated in the genome. We show, both in stably cancerous cell lines and in primary cells, that its overexpression stimulates the cell proliferation. In contrast, its knockdown, by siRNA leads to an opposite phenotype, a decrease in cell proliferation. Transcriptomic analysis reveals that overexpression of jouvence leads to a dedifferentiation signature of the cells, a cellular effect comparable to rejuvenation. Inversely, the knockdown of jouvence leads to a decrease of genes involved in ribosomes biogenesis and spliceosome in agreement with the canonical role of a H/ACA box snoRNA. In this context, jouvence could represent a now tool to fight against the deleterious effect of aging, as well as a new target in cancer therapy.
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