UBC Faculty Research and Publications

Whole blood vs PBMC: compartmental differences in gene expression profiling exemplified in asthma He, Daniel; Yang, Chen X; Sahin, Basak; Singh, Amrit; Shannon, Casey P; Oliveria, John-Paul; Gauvreau, Gail M; Tebbutt, Scott J

Abstract

Background: Blood has proven to be a useful resource for molecular analysis in numerous biomedical studies, with peripheral blood mononuclear cells (PBMCs) and whole blood being the major specimen types. However, comparative analyses between these two major compartments (PBMCs and whole blood) are few and far between. In this study, we compared gene expression profiles of PBMCs and whole blood samples obtained from research subjects with or without mild allergic asthma. Methods: Whole blood (PAXgene) and PBMC samples were obtained from 5 mild allergic asthmatics and 5 healthy controls. RNA from both sample types was measured for expression of 730 immune-related genes using the NanoString nCounter platform. Results: We identified 64 uniquely expressed transcripts in whole blood that reflected a variety of innate, humoral, and adaptive immune processes, and 13 uniquely expressed transcripts in PBMCs which were representative of T-cell and monocyte-mediated processes. Furthermore, analysis of mild allergic asthmatics versus non-asthmatics revealed 47 differentially expressed transcripts in whole blood compared to 1 differentially expressed transcript in PBMCs (FDR 

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Attribution 4.0 International (CC BY 4.0)

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