Optimal Reference Gene Selection for Expression Studies in Human Reticulocytes.

Area of Science:

• Molecular Biology
• Hematology
• Genetics

Background:

• Reference genes are essential for accurate mRNA quantification in real-time quantitative PCR (RT-qPCR).
• Expression stability of reference genes can be influenced by experimental conditions and inherent biological factors.
• Selecting appropriate reference genes is critical for reliable gene expression analysis, particularly in disease states.

Purpose of the Study:

• To identify and validate optimal reference genes for gene expression analysis in human reticulocytes.
• To assess the suitability of reference genes in the context of hereditary spherocytosis (HS) and β-thalassemia intermedia (βTI) patient samples.
• To compare the stability of commonly used reference genes with newly identified candidates.

Main Methods:

• Seven candidate reference genes (PGK1, MPP1, HPRT1, ACTB, GAPDH, RN18S1, and SDHA) were selected based on literature.
• Real-time quantitative PCR was performed on reticulocytes from healthy volunteers and patients with HS and βTI.
• Gene expression stability was analyzed using the fold-change method and RefFinder software.

Main Results:

• MPP1 and GAPDH were identified as the most stable reference genes for reticulocyte expression analysis across all sample groups.
• The stability of MPP1 and GAPDH was confirmed through validation using disease-specific markers (eosin-5'-maleimide binding assay for HS and percentage of hemoglobin F for βTI).
• Commonly used reference genes ACTB and RN18S1 showed less stability compared to MPP1 and GAPDH.

Conclusions:

• MPP1 and GAPDH are recommended as optimal reference genes for gene expression studies in human reticulocytes, especially in the context of HS and βTI.
• The findings provide a reliable basis for accurate gene expression normalization in reticulocyte research.
• This study highlights the importance of rigorous reference gene validation for robust molecular diagnostics and research.