Complete array of HOX gene expression by RQ-PCR

Area of Science:

• Developmental Biology
• Molecular Biology
• Cancer Genetics

Background:

• The HOX gene network comprises 39 genes crucial for mammalian development, including hematopoiesis.
• Chromosomal translocations in acute leukemias often involve HOX genes or regulatory factors like MLL, causing aberrant gene expression.
• HOX genes share high sequence similarity, particularly in the homeobox domain, due to evolutionary duplication.

Purpose of the Study:

• To establish a precise method for quantifying HOX gene expression (the HOXOME).
• To investigate the role of HOX genes in hematopoiesis and leukemia.
• To identify potential therapeutic targets for leukemia.

Main Methods:

• Utilized real-time quantitative PCR (RQ-PCR) with Taqman probe chemistry.
• Developed carefully selected reagents for specific HOX gene quantification.
• Applied the platform to measure individual human and murine HOX genes.

Main Results:

• Demonstrated the value of RQ-PCR with Taqman chemistry for precise HOX gene measurement.
• Achieved high specificity and a wide dynamic range in quantifying HOX gene expression.
• Established a reliable method for analyzing the HOXOME.

Conclusions:

• Quantifying HOX gene expression is feasible and precise using RQ-PCR.
• Understanding HOX gene roles in hematopoiesis is key to elucidating leukemia mechanisms.
• This research may lead to novel therapeutic strategies for leukemia by targeting HOX gene deregulation.