Reference genes for quantitative analysis on Clonorchis sinensis gene expression by real-time PCR

Area of Science:

• Molecular Biology
• Parasitology
• Biotechnology

Background:

• Quantitative real-time polymerase chain reaction (qPCR) accuracy relies on stable reference gene selection.
• Reference gene validation is crucial for reliable comparative gene expression studies.

Purpose of the Study:

• To determine the stability of eight reference gene candidates in Clonorchis sinensis.
• To identify optimal normalization strategies for target gene expression analysis in C. sinensis.

Main Methods:

• Gene expression stability analysis of eight reference genes using the geNorm program.
• RNA extraction from C. sinensis metacercariae and adults.
• Evaluation under different experimental conditions (irradiation, bile treatment).

Main Results:

• Identified stable reference genes: phosphoglycerate kinase, beta-actin, and calcyphosine (stage-dependent).
• Succinate dehydrogenase, small nuclear ribonucleoprotein, and beta-actin were stable under irradiation.
• Small nuclear ribonucleoprotein, phosphoglycerate kinase, and succinate dehydrogenase were stable with bile treatment.
• Target gene expression levels were influenced by normalization factors.

Conclusions:

• Recommends using the geometric mean of multiple validated reference genes for accurate C. sinensis gene expression normalization.
• Suggests employing more than three reference genes for robust comparative studies.