High-Throughput Transcriptomics of Celf1 Conditional Knockout Lens Identifies Downstream Networks Linked to Cataract...

Area of Science:

• Developmental Biology
• Genetics
• Ophthalmology

Background:

• Congenital cataracts stem from ocular lens developmental defects.
• RNA-binding proteins, such as CUGBP Elav-like family member 1 (Celf1), are crucial for lens biology.
• Celf1 deficiency is linked to lens abnormalities and early-onset cataracts in animal models and humans.

Purpose of the Study:

• To define genome-wide transcriptomic alterations in the ocular lens resulting from Celf1 deficiency.
• To identify downstream genes and regulatory pathways affected by Celf1 loss in lens development.
• To uncover novel candidate genes associated with congenital cataracts.

Main Methods:

• High-throughput RNA-sequencing was performed on ocular lenses from Celf1 conditional knockout (Celf1^cKO) mice at postnatal day 0.
• Differential gene expression analysis identified significantly altered transcripts.
• Downstream analyses included gene ontology, pathway analysis, and comparison with existing datasets.

Main Results:

• Celf1^cKO lenses exhibited 987 differentially expressed genes (DEGs) compared to controls.
• Of the DEGs, 327 were downregulated and 660 were upregulated in Celf1-deficient lenses.
• Key cataract-linked genes (e.g., Cryab, Gja3) and novel candidates (e.g., Ell2, Prdm16) were identified.

Conclusions:

• Celf1 deficiency significantly alters the lens transcriptome, impacting genes critical for lens structure and function.
• The study reveals novel downstream targets and pathways involved in lens development and congenital cataracts.
• These findings provide a deeper understanding of Celf1's role in preventing early-onset cataracts.