Identification of Suitable Reference Genes for Normalization of Real-Time Quantitative Polymerase Chain Reaction in...

Area of Science:

• Molecular Biology
• Immunology
• Genetics

Background:

• Accurate normalization is critical for real-time quantitative polymerase chain reaction (RT-qPCR) analysis in acute graft-versus-host disease (GVHD) research.
• Identifying reliable reference genes is essential for mRNA studies in intestinal GVHD models post-bone marrow transplantation (BMT).

Purpose of the Study:

• To identify and validate suitable reference genes for normalizing gene expression in an intestinal GVHD mouse model.
• To evaluate the expression stability of nine candidate reference genes using multiple analytical methods.

Main Methods:

• Establishment of a murine model for mild and moderate intestinal GVHD post-BMT.
• Collection of intestinal tissues (duodenum, jejunum, ileum, colon) at multiple time points post-transplantation.
• Quantification of candidate reference gene mRNA levels (B2M, SDHA, HPRT, ACTB, GAPDH, HMBS, TBP, YWHAZ, RPLP0) using RT-qPCR and stability analysis with Genorm, Normfinder, Bestkeeper, and ΔCt methods.

Main Results:

• ACTB and HMBS exhibited the highest and lowest expression levels, respectively, across all samples.
• HPRT and SDHA were identified as the most stable genes by Genorm.
• Normfinder and ΔCt methods indicated HPRT as the most stably expressed gene, while Bestkeeper also ranked HPRT highly.

Conclusions:

• HPRT is recommended as the most suitable reference gene for mRNA expression studies in intestinal GVHD mouse models.
• The validated reference gene HPRT can serve as a reliable internal control for RT-qPCR analysis in this specific GVHD model.
• This study provides a foundation for more accurate molecular investigations into intestinal GVHD pathogenesis and therapeutic strategies.