Skip Navigation
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

National Institute of Environmental Health Sciences

Use this QR code to view the newest version of this document
Use this QR code to view the newest version of this document

Your Environment. Your Health.

Publication Detail

Title: Exposure to Fine Particulate Matter Air Pollution Alters mRNA and miRNA Expression in Bone Marrow-Derived Endothelial Progenitor Cells from Mice.

Authors: Li, Xiaohong; Haberzettl, Petra; Conklin, Daniel J; Bhatnagar, Aruni; Rouchka, Eric C; Zhang, Mei; O'Toole, Timothy E

Published In Genes (Basel), (2021 07 10)

Abstract: Exposure to fine particulate matter (PM2.5) air pollution is associated with quantitative deficits of circulating endothelial progenitor cells (EPCs) in humans. Related exposures of mice to concentrated ambient PM2.5 (CAP) likewise reduces levels of circulating EPCs and induces defects in their proliferation and angiogenic potential as well. These changes in EPC number or function are predictive of larger cardiovascular dysfunction. To identify global, PM2.5-dependent mRNA and miRNA expression changes that may contribute to these defects, we performed a transcriptomic analysis of cells isolated from exposed mice. Compared with control samples, we identified 122 upregulated genes and 44 downregulated genes in EPCs derived from CAP-exposed animals. Functions most impacted by these gene expression changes included regulation of cell movement, cell and tissue development, and cellular assembly and organization. With respect to miRNA changes, we found that 55 were upregulated while 53 were downregulated in EPCs from CAP-exposed mice. The top functions impacted by these miRNA changes included cell movement, cell death and survival, cellular development, and cell growth and proliferation. A subset of these mRNA and miRNA changes were confirmed by qRT-PCR, including some reciprocal relationships. These results suggest that PM2.5-induced changes in gene expression may contribute to EPC dysfunction and that such changes may contribute to the adverse cardiovascular outcomes of air pollution exposure.

PubMed ID: 34356074 Exiting the NIEHS site

MeSH Terms: Air Pollution/adverse effects*; Animals; Bone Marrow/drug effects; Bone Marrow/metabolism; Bone Marrow/pathology*; Cell Movement; Cell Proliferation; Endothelial Progenitor Cells/drug effects; Endothelial Progenitor Cells/metabolism; Endothelial Progenitor Cells/pathology*; Gene Expression Regulation/drug effects*; Male; Mice; Mice, Inbred C57BL; MicroRNAs/genetics*; Particulate Matter/toxicity*; RNA, Messenger/genetics; RNA, Messenger/metabolism*

Back
to Top