Use of the whole leucocyte population in the study of the NFκB pathway

Area of Science:

• Immunology
• Molecular Biology
• Genetics

Background:

• Nuclear factor NF-κB (NFκB) regulates innate immunity and inflammatory genes, linking it to chronic diseases like coronary heart disease (CHD).
• Individual susceptibility to CHD may stem from variations in gene transcription and expression in circulating cells, such as leukocytes.

Purpose of the Study:

• To determine if total white blood cells (leukocytes) can be used to study lipopolysaccharide (LPS)-induced gene expression in the NFκB pathway.
• To compare NFκB pathway gene expression in total leukocytes versus isolated monocyte and neutrophil populations.

Main Methods:

• Gene expression analysis of 84 NFκB pathway genes.
• Treatment of total leukocytes, monocytes, and neutrophils with lipopolysaccharide (LPS).
• Comparison of gene expression patterns across different cell populations.

Main Results:

• The majority of examined NFκB pathway genes were upregulated by LPS treatment in all cell types after 12 hours.
• Total leukocyte populations demonstrated gene expression patterns similar to isolated neutrophils and monocytes.
• The use of total leukocytes simplifies NFκB pathway studies, avoiding cell separation and potential activation.

Conclusions:

• Total leukocytes are a viable and efficient cell population for studying NFκB pathway gene expression in response to LPS.
• This finding supports the use of total leukocytes in large-scale clinical studies of inflammation and CHD, reducing sample requirements and processing time.
• Utilizing total leukocytes facilitates advanced molecular techniques like ChIP and ChIP-sequencing for comprehensive NFκB pathway analysis in disease states.