Identification of new reference genes with stable expression patterns for cell cycle experiments in human leukemia...

Area of Science:

• Molecular Biology
• Cell Biology
• Cancer Research

Background:

• Cell cycle-dependent gene expression is critical for understanding cellular processes and tumorigenesis.
• Quantitative real-time PCR (RT-qPCR) is a sensitive method for analyzing gene expression, but requires reliable reference genes for normalization.
• The stability of commonly used reference genes for cell cycle analysis has not been adequately validated.

Purpose of the Study:

• To identify and validate reference genes with stable mRNA expression throughout the cell cycle in human leukemia cell lines.
• To assess the suitability of commonly used and recently identified reference genes for cell cycle-dependent gene expression studies.

Main Methods:

• Synchronization of MOLT4 and U937 human leukemia cell lines using RO-3306 CDK1 inhibitor.
• Quantitative real-time PCR (RT-qPCR) was employed to measure the expression levels of candidate reference genes across different cell cycle phases.
• Analysis of gene expression stability to identify suitable reference genes for normalization.

Main Results:

• The commonly used reference gene TATA-binding protein (TBP) demonstrated stable expression throughout the cell cycle in both cell lines.
• The reference genes SNW1 and CNOT4 exhibited cell line-dependent stability, performing variably in MOLT4 and U937 cells.
• Normalization using inappropriate reference genes can significantly impact the reliability of cell cycle-dependent gene expression data.

Conclusions:

• TBP is a suitable reference gene for cell cycle-dependent gene expression analysis in the studied leukemia cell lines.
• SNW1 and CNOT4 require careful evaluation for their suitability based on the specific cell line and experimental context.
• The selection of appropriate reference genes is paramount for accurate and reliable normalization in RT-qPCR studies of cell cycle regulation.