Evaluating whole transcriptome amplification for gene profiling experiments using RNA-Seq.

Area of Science:

• Molecular Biology
• Genomics
• Bioinformatics

Background:

• RNA-Seq enables gene expression profiling for genotype-phenotype links.
• Low RNA input is a significant limitation for RNA-Seq studies.
• Whole transcriptome amplification (WTA) generates sufficient sequencing targets from minute RNA amounts.

Purpose of the Study:

• Evaluate the efficacy of NuGEN's Ovation RNA-Seq V2 system for WTA.
• Investigate potential biological artifacts introduced by WTA.
• Compare matched raw and amplified RNA libraries from rat adipose tissue.

Main Methods:

• Utilized NuGEN's Ovation RNA-Seq V2 system with linear isothermal amplification.
• Employed a unique chimeric primer for RNA amplification.
• Performed RNA sequencing and bioinformatic analyses using the Tuxedo pipeline.

Main Results:

• 93% of expressed genes were identical between unamplified and amplified samples.
• Gene density remained similar across all comparisons.
• Differentially expressed genes constituted less than 0.15% of shared genes.

Conclusions:

• WTA efficiently maintains relative transcript frequencies without significant bias under ideal conditions.
• This NuGEN kit is suitable for RNA-Seq when RNA input is limited.
• WTA has broad applications in clinical, diagnostic, and field-based studies.