Personalized briefing
Discovery of the day · Cell Biology
EPHA2/CD44-directed trafficking enhances endosomal leakiness and antisense therapy delivery
Dear Abdel Halim Harrath, this is your personalized scientific intelligence briefing — curated for your work in Cell Biology.
Key finding
Biology · Cell Biology
Discovery of the day
This study identifies a novel endocytic route whereby therapeutic antisense oligonucleotides (ASOs) engage the scavenger receptor CD44, activating the ERK-RSK signaling axis to drive serine phosphorylation of the receptor tyrosine kinase EPHA2. This phosphorylation event permits ASO trafficking to nuclear-captured endosomes, where lipid peroxidation induces leakiness, enabling ASO escape and effective suppression of target mRNAs. These findings reveal a previously undescribed mechanism governing ASO intracellular delivery, and the demonstrated enhancement of activity via inhibition of stress granule-mediated endosome repair holds direct translational relevance for refining nucleic acid therapeutics — a strategy that may ultimately inform interventions for cellular disruption and age-related decline in reproductive and somatic tissues.
Novelty
94%
Rigor
88%
Significance
91%
Validity
84%
Clarity
90%
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