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Published on: February 6, 2012
Changes in the peripheral blood transcriptome associated with occupational benzene exposure identified by
Cliona M McHale1, Luoping Zhang, Qing Lan
1School of Public Health, University of California, Berkeley, CA 94720, USA. cmchale@berkeley.edu <cmchale@berkeley.edu>
Genomics
|January 24, 2009
Summary
Occupational benzene exposure alters gene expression in blood cells, potentially revealing leukemia pathways. This study identified key genes and biological processes affected by benzene, offering insights into its toxicity.
Area of Science:
- Toxicology
- Molecular Biology
- Genomics
Background:
- Benzene is a known human carcinogen linked to leukemia and lymphoma.
- The precise molecular mechanisms underlying benzene's carcinogenicity are not fully understood.
Purpose of the Study:
- To identify global gene expression changes in peripheral blood mononuclear cells (PBMCs) due to occupational benzene exposure.
- To elucidate the molecular pathways involved in benzene-induced hematotoxicity.
Main Methods:
- Utilized two distinct microarray platforms (Affymetrix and Illumina) for gene expression profiling.
- Analyzed gene expression in PBMCs from shoe-factory workers with well-characterized benzene exposure.
- Performed gene ontology and pathway analyses on differentially expressed genes.
Main Results:
- Identified 2692 (Affymetrix) and 1828 (Illumina) differentially expressed genes, with 50% concordance.
- Confirmed four previously identified genes (CXCL16, ZNF331, JUN, PF4) among the top differentially expressed genes.
- Gene ontology analysis revealed enrichment of apoptosis-related genes; pathway analysis highlighted lipid metabolism.
Conclusions:
- A two-platform approach provides robust identification of transcriptome alterations in benzene-exposed individuals.
- Benzene exposure significantly impacts PBMC gene expression, particularly affecting apoptosis and lipid metabolism pathways.
- These findings contribute to understanding the molecular basis of benzene's leukemogenic potential.