Cone-rod homeobox protein (CRX) (CRX)

Cone-rod homeobox protein (CRX) is a critical transcription factor belonging to the OTX family, primarily expressed in retinal photoreceptor cells and the pineal gland (UniProt: O43186). It plays a fundamental role in the differentiation and survival of rod and cone cells by regulating the expression of essential phototransduction genes such as rhodopsin and color opsins (NCBI Gene: 1406). Mutations in the CRX gene are a significant cause of inherited retinal dystrophies, including Leber congenital amaurosis type 7 and cone-rod dystrophy type 2, which lead to progressive vision loss (OMIM: 602225). While CRX is not currently targeted by conventional small-molecule drugs, it is a major focus for advanced therapeutic modalities like AAV-mediated gene replacement and CRISPR/Cas9 gene editing (PubMed: 32810115). These strategies aim to restore or correct CRX function to halt or reverse retinal degeneration in patients with loss-of-function or dominant-negative mutations.

Other names

CORD2CRDLCA7OTX3Cone-rod homeobox

Gene augmentation to provide functional copies of the CRX gene or gene editing to correct dominant-negative mutations (PubMed: 32810115).