Differential gene expression profiling of vocal fold polyps and Reinke's edema by complementary DNA microarray

Area of Science:

• * Molecular biology
• * Genomics
• * Laryngology

Background:

• * Reinke's edema (RE) and vocal fold polyps are phenotypically similar benign lesions.
• * Understanding their distinct molecular underpinnings is crucial for diagnosis and treatment.
• * Gene expression profiling offers a potential avenue for differentiation.

Purpose of the Study:

• * To determine if complementary DNA (cDNA) microarray analysis (MA) can establish distinct gene expression profiles for RE and polyps.
• * To identify molecular markers associated with reflux and smoking within these lesions.
• * To assess the feasibility of classifying uncharacterized lesions using MA.

Main Methods:

• * cDNA microarray analysis of 8,745 genes was performed on 11 RE and 17 polyp specimens.
• * Gene expression profiles were analyzed for associations with reflux exposure and smoking.
• * Prediction analysis and real-time polymerase chain reaction were used for classification and validation.

Main Results:

• * Sixty-five genes significantly differentiated between RE and polyps (p = .0088).
• * Nineteen genes differentiated reflux exposure in RE (p = .016), but no significant markers for smoking or reflux were found in polyps.
• * Unclassified lesions could be categorized using a minimum of 13 genes.

Conclusions:

• * cDNA microarray analysis is feasible for classifying benign vocal fold lesions like RE and polyps.
• * MA can improve diagnosis and classification of these lesions.
• * The technique holds potential for identifying prognostic indicators and therapeutic targets.