ArticlebioRxiv : the preprint server for biology2026
Cap-Independent Translation Regulation of VEGF Using CRISPR-dCas13d.
Article in bioRxiv : the preprint server for biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Vascular endothelial growth factor (VEGF) is a central driver of pathological angiogenesis in cancer and retinal disease. A G-quadruplex (GQ) structure that forms in an Internal Ribosome Entry Site (IRES) of VEGF was proposed to recruit the 40S ribosome and initiate cap-independent translation under hypoxia. We demonstrate that blocking this GQ with dCas13d represses VEGF translation by up to 5-fold, without impacting mRNA abundance, under hypoxia. Similar levels of repression were attained in HeLa and human umbilical vein endothelial cells (HUVECs) using immunofluorescence and western blot assays, as well as a bicistronic dual-luciferase experiment. Single molecule Förster resonance energy transfer (smFRET) and fluorescence enhancement assays demonstrated destabilization of the GQ by CRISPR-dCas13d. We also tested the functional consequences of this regulation using tube formation assay in bovine aortic endothelial cells (BAOECs), which demonstrated consistent results with VEGF expression levels. Our study demonstrates the feasibility of using CRISPR-dCas13d as a sequence-specific and transient translation regulator for a large group of genes that contain translationally-active secondary structures.
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