Examining smoking-induced differential gene expression changes in buccal mucosa

Area of Science:

• Molecular Biology
• Genomics
• Biomarker Discovery

Background:

• Blood sampling for gene expression analysis is invasive and requires specialized personnel.
• Buccal mucosa cells present an easily accessible, less invasive alternative for sample collection.
• Limited research exists on buccal cells as a viable RNA source for expression analysis.

Purpose of the Study:

• To evaluate the efficacy of buccal mucosa cells as an alternative tissue source for gene expression analysis.
• To determine if RNA isolated from buccal cells can be used to detect differential gene expression.
• To compare gene expression in buccal cells between smokers and nonsmokers.

Main Methods:

• Total RNA was isolated from buccal swabs and amplified.
• Reverse transcription quantitative PCR (RT-qPCR) and microarray analyses were employed.
• Gene expression was compared between female smokers and nonsmokers using buccal cell RNA.

Main Results:

• An amplification protocol enabled the use of minimal buccal cell RNA (50 ng).
• Despite RNA degradation, buccal cell RNA was suitable for RT-qPCR detection of specific genes.
• Statistically significant differential gene expression was observed between smokers and nonsmokers.

Conclusions:

• Buccal cells can be utilized to detect differential gene expression, particularly between smokers and nonsmokers.
• High RNA degradation, increased sample variability, and microarray failure rates necessitate cautious use of buccal samples.
• Further research is needed to optimize buccal cell RNA for robust gene expression studies.