Escorting mRNAs - the multifunctional and divergent roles of cap-chaperones in post-transcriptional gene expression.
Level 5 - mechanism / opinion, no new human data
Narrative review of bench and molecular mechanisms with no original human data
PubMed 42206971 · doi:10.1242/jcs.264780
What was done
Narrative review synthesizing evidence on the subcellular localization and multifunctional roles of cap-chaperones (the cap-binding complex [CBC] and eukaryotic translation initiation factor eIF4E) in post-transcriptional gene expression and their dysregulation in cancer.
What was found
The abstract provides no numerical data. It notes that both CBC and eIF4E localize to both the nucleus and cytoplasm, challenging the traditional view that CBC functions solely in the nucleus and eIF4E solely in the cytoplasm. It describes how differential cap-chaperone engagement alters mRNA processing machinery interactions, target transcripts, and mRNA fate.
Why it matters
Synthesizes an updated model of gene regulation where cap-chaperone selection dynamically regulates post-transcriptional mRNA fate across cellular compartments rather than serving static housekeeping roles.
Limits
Narrative review lacking a systematic search protocol or quantitative data in the abstract. Relies on preclinical molecular and mechanistic literature without direct clinical trial evidence.
Cited by
- contradicts In the cell, mRNA remains in the cytoplasm and does not enter the nucleus.