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. 2025 Oct 28.
doi: 10.1038/s41587-025-02853-z. Online ahead of print.

Selective RNA sequestration in biomolecular condensates directs cell fate transitions

Affiliations

Selective RNA sequestration in biomolecular condensates directs cell fate transitions

Patrizia Pessina et al. Nat Biotechnol. .

Abstract

Controlling stem cell differentiation is a longstanding goal in biomedical research. Here we explore how cell fate is influenced by RNA condensates, specifically P-bodies, which modulate gene expression posttranscriptionally. We profiled the transcriptomes of biomolecular condensates in diverse developmental contexts spanning multiple vertebrate species. Our analyses revealed conserved, cell type-specific sequestration of untranslated RNAs encoding cell fate regulators. P-body RNA contents do not reflect active gene expression in each cell type but are enriched for translationally repressed transcripts characteristic of the preceding developmental stage. Mechanistically, P-body contents are controlled by microRNAs and can be profoundly reshaped by perturbing AGO2 or polyadenylation site usage. Applying these insights to stem cell differentiation, we show that manipulating P-body assembly or microRNA activity can direct naive mouse and human pluripotent stem cells toward totipotency or primed human embryonic cells toward the germ cell lineage. Our findings link cell fate decisions to RNA condensates across vertebrates and provide a means of controlling cell identity.

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Conflict of interest statement

Competing interests: N.J.K.’s laboratory has received research support from Vir Biotechnology, F. Hoffmann-La Roche and Rezo Therapeutics. N.J.K. is the president and is on the board of directors of Rezo Therapeutics, and he is a shareholder in Tenaya Therapeutics, Maze Therapeutics, Rezo Therapeutics, GEn1E Lifesciences and Interline Therapeutics. N.J.K. also has financially compensated consulting agreements with the Icahn School of Medicine at Mount Sinai, New York, Interline Therapeutics, Rezo Therapeutics, GEn1E Lifesciences and Twist Bioscience (all within the last 36 months). The other authors declare no competing interests.

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