Comparative transcriptome analysis of human conjunctiva between normal and conjunctivochalasis persons by RNA...

Area of Science:

• Ophthalmology
• Molecular Biology
• Genomics

Background:

• Conjunctivochalasis (CCH) is a prevalent ocular condition, particularly in aging populations.
• The molecular mechanisms underlying CCH at the transcriptional level remain largely uncharacterized.

Purpose of the Study:

• To investigate the transcriptional landscape of human conjunctiva in CCH patients compared to normal individuals.
• To identify differentially expressed genes and pathways involved in CCH pathogenesis.

Main Methods:

• Illumina RNA sequencing (RNA-seq) was employed to profile the transcriptome of conjunctival samples.
• Bioinformatic analyses included read mapping, gene expression analysis, Gene Ontology (GO), and Kyoto Encyclopedia of Gene and Genomes (KEGG) pathway analysis.
• Quantitative real-time PCR (qRT-PCR) was used to validate the expression patterns of selected genes.

Main Results:

• RNA-seq analysis revealed significant differences in gene expression between CCH patients and normal controls, with 175 up-regulated and 582 down-regulated genes identified.
• Down-regulated genes were notably associated with cell cycle, proliferation (e.g., BUB1, CCNB1, CCNB2, CENPA), and keratinization/differentiation (e.g., SPRR1A, SPRR1B, CALML5).
• The gene CALML6 was identified as potentially important in CCH development due to its over-expression.

Conclusions:

• This study provides a comprehensive transcriptional profile of CCH, offering valuable insights into its molecular underpinnings.
• The identified differentially expressed genes and pathways shed light on the pathogenic mechanisms of CCH, particularly concerning cell proliferation and differentiation.
• These findings lay the groundwork for future research into CCH and potential therapeutic strategies.