ArticleStem cell reports2026
Human CRX regulates photoreceptor cells development via bidirectional transcriptional control in retinal organoids.
Article in Stem cell reports, 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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8 authors.
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Abstract
CRX (cone-rod homeobox) is a key regulator of retinal photoreceptor development, yet its human-specific functions remain poorly understood due to scarce human retinal tissues and significant species differences. Here, we established a human CRX-mCherry fluorescent reporter retinal organoid (RO) model to dissect CRX-mediated gene regulation. Using FACS, RNA sequencing, and Cleavage Under Targets and Tagmentation (CUT&Tag) sequencing, we identified CRX target genes and revealed its dual regulatory role: it activates photoreceptor-specific genes (e.g., RP1L1, linked to inherited retinal degeneration) in a dose-dependent manner, while suppressing non-photoreceptor genes (e.g., PCDH8 and PROX1). Notably, we first generated the human CRX CUT&Tag dataset, providing direct insights into CRX's genome-wide regulatory landscape in photoreceptor cell development. These findings demonstrate that CRX functions as both a transcriptional activator and repressor, ensuring photoreceptor-specific gene expression and preventing aberrant cell fate transitions. Our study provides critical insights into the role of human CRX in retinal development and implications for retinal degenerative diseases.
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