Nekódující RNA v oocytu a časném embryu

Aleshkina, Daria

Once considered as 'transcriptional noise' noncoding RNAs (ncRNAs) nowadays are known to be key molecules in major cellular processes. NcRNAs are expressed at very high levels as only 2% of transcribed genome corresponds to protein-coding RNAs in higher eukaryotes. Various ncRNAs are known to have structural, functional, or regulatory roles, but the influence of the majority of non-coding transcripts is still unclear. Among ncRNAs, long ncRNAs (lncRNAs, longer than 200 bp) are of particular interest. LncRNAs do not have a uniform function but many studies observed lncRNA-based regulations at the transcriptional and translational levels. Therefore, novel lncRNAs could specifically fine-tune protein synthesis in the highly differentiated cell types. Particularly, fully-grown mammalian oocyte and early embryo require precisely controlled translation of maternal transcripts to coordinate meiotic progression and early embryo development while transcription is silent. We aimed to study the involvement of ncRNAs in protein synthesis and consequent influence on the oocyte and early embryo physiology. For the first time, we analysed the expression and distribution of several ncRNAs, namely Brain cytoplasmic RNA 1 (BC1), lncRNA in Oocyte Specifically Expressed (Rose), RNA Component of 7SK Nuclear...

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