Reference loci for RT-qPCR analysis of differentiating human embryonic stem cells

Area of Science:

• Stem cell biology
• Molecular biology
• Gene expression analysis

Background:

• Accurate gene expression analysis using reverse transcription quantitative polymerase chain reaction (RT-qPCR) relies on selecting stably expressed reference genes.
• Reference gene stability can be compromised during the differentiation of human embryonic stem (hES) cells due to inherent cellular changes.

Purpose of the Study:

• To evaluate the stability of candidate reference genes during retinoic acid-induced differentiation of hES cells.
• To identify the most stable reference genes for RT-qPCR normalization in this specific experimental context.

Main Methods:

• Retinoic acid-induced differentiation of hES cells was performed using a 2 microM concentration.
• The expression stability of 12 candidate reference genes was assessed throughout the differentiation process.

Main Results:

• Beta-2-microglobulin, ribosomal protein L13A, and Alu repeats were identified as the most stable reference genes.
• Several commonly used reference genes demonstrated instability during hES cell differentiation.

Conclusions:

• Commonly utilized reference genes may not be suitable for normalizing gene expression during retinoic acid-induced hES cell differentiation.
• A novel normalization strategy utilizing expressed Alu repeats was validated for hES cell experiments.