Selection of reference genes for quantitative real-time RT-PCR studies in mouse brain

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Real-time reverse transcriptase polymerase chain reaction (RT-PCR) is widely used in neuroscience to study gene expression.
• Accurate gene expression analysis relies on the selection of stable reference genes.
• The need for reliable reference genes in mouse brain development and maturation studies is growing.

Purpose of the Study:

• To evaluate the suitability of common and novel housekeeping genes as reference controls in mouse brain development.
• To assess gene expression stability across different mouse brain regions during maturation and aging.
• To identify the most reliable reference genes for RT-PCR studies in the developing and aging mouse brain.

Main Methods:

• Candidate reference genes (Gapdh, 18s, B2m, Pgk1, Tfrc, Gusb) were tested in various mouse brain regions (whole brain, cerebellum, brain stem, hippocampus, medial septum, frontal neocortex, olfactory bulb).
• Gene expression stability was analyzed during mouse brain development, maturation, and aging.
• The study included the first comprehensive analysis of Pgk1 expression across the lifespan of the mouse brain.

Main Results:

• No single reference gene was optimal for all analyzed mouse brain regions.
• Novel housekeeping genes generally exhibited higher stability compared to common ones across most regions.
• Pgk1 demonstrated reliable control gene performance in most mouse brain regions throughout development, maturation, and aging, with few exceptions.

Conclusions:

• Commonly used housekeeping genes may not be suitable as universal reference controls in mouse brain studies.
• Novel housekeeping genes, especially Pgk1, offer improved stability for RT-PCR applications in neuroscience.
• Pgk1 is a promising and reliable reference gene for analyzing gene expression in the developing, maturing, and aging mouse brain.