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A Non-invasive Way to Isolate and Phenotype Cells from the Conjunctiva
Published on: July 5, 2017
Adaptation of impression cytology to enable conjunctival surface cell transcriptome analysis
John L Bradley1, Clara S Edwards, Roderick J Fullard
1School of Optometry, University of Alabama at Birmingham , Birmingham, AL , USA.
Current Eye Research
|September 20, 2013
Summary
Conjunctival impression cytology successfully yields RNA for transcriptome analysis in dry eye disease. This method can identify gene expression differences, aiding in developing targeted dry eye treatments.
Area of Science:
- Ophthalmology
- Molecular Biology
- Genomics
Background:
- Dry eye disease (DED) is a prevalent condition affecting the ocular surface.
- Understanding gene expression profiles in DED is crucial for developing effective treatments.
Purpose of the Study:
- To assess the feasibility of quantifying the human transcriptome from conjunctival impression cytology (CIC) extracts.
- To determine if RNA isolated from CIC can reveal gene expression differences between normal and DED patients.
Main Methods:
- Conjunctival impression cytology (CIC) collected cells from 53 normal and DED patients.
- RNA isolation and quantitative real-time PCR (qRT-PCR) were used for gene expression analysis.
- Transcriptome-wide analysis was performed using Illumina Human HT-12 BeadChip.
Main Results:
- Optimized RNA processing enabled analysis from 96 genes to the entire transcriptome.
- Over 30 genes showed expression differences (>1.5 fold) between DED and normal groups.
- Seven genes, including HLA-DRB5 and FOS, were significantly downregulated (>2.0 fold) in DED patients.
Conclusions:
- CIC is a viable method for collecting sufficient RNA for transcriptome-wide gene expression analysis.
- Further studies with larger cohorts are needed to identify significant gene expression trends in DED.
- Identifying these trends can lead to targeted therapeutic strategies for DED.
