Conditional deletion of Ahr alters gene expression profiles in hematopoietic stem cells
Open accessAbstract
The aryl hydrocarbon receptor (AHR) is a ligand activated bHLH transcription factor that belongs to the Per-Arnt-Sim (PAS) superfamily of proteins involved in mediating responses to cellular environment regulating normal physiological and developmental pathways. The AHR binds a broad range of naturally derived and synthetic compounds, and plays a major role in mediating effects of certain environmental chemicals. Although our understanding of the physiological roles of the AHR in the immune system is evolving, there is little known about its role in hematopoiesis and hematopoietic diseases. Prior studies demonstrated that AHR null (AHR-KO) mice have impaired hematopoietic stem cell (HSC) function; they develop myeloproliferative changes in peripheral blood cells, and alterations in hematopoietic stem and progenitor cell populations in the bone marrow. We hypothesized mice lacking AHR expression only within hematopoietic cells (AHRVav1 mice) would develop similar changes. However, we did not observe a complete phenocopy of AHR-KO and AHRVav1 animals at 2 or 18 months of age. To illuminate the signaling mechanisms underlying the alterations in hematopoiesis observed in these mice, we sorted a population of cells highly enriched for HSC function (LSK cells: CD34-CD48-CD150+) and performed microarray analyses. Ingenuity Pathway and Gene Set Enrichment Analyses revealed that that loss of AHR within HSCs alters several gene and signaling networks important for HSC function. Differences in gene expression networks among HSCs from AHR-KO and AHRVav1 mice suggest that AHR in bone marrow stromal cells also contributes to HSC function. In addition, numerous studies have suggested a role for AHR in both regulation of hematopoietic cells, and in the development of blood diseases. More work is needed to define what these signals are, and how they act upon HSCs.
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AHR has cell-specific roles in lymphocytes, intestinal epithelial cells, keratinocytes, Langerhans cells, and hematopoietic stem cells.
“Subsequent examination of this mouse crossed to various Cre models has unveiled a cell specific role for AHR in lymphocytes, intestinal epithelial cells, keratinocytes, Langerhans cells, and hematopoietic stem cells to name a few (Bennett et al., 2018; Haas et al., 2016; Hong et al., 2020; Li et al., 2018; Metidji et al., 2018)”
From Rodent Genetic Models of Ah Receptor Signaling (2021) · cites this paper as Bennett et al., 2018
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Franchini, A. M., Myers, J. R., Jin, G.-B., Shepherd, D. M., & Lawrence, B. P. (2019) · ImmunoHorizons · doi:10.4049/immunohorizons.1900004 · Cited by 23 · see citing works
Self-citationRodent Genetic Models of Ah Receptor Signaling
Wilson, R. H., & Bradfield, C. A. (2021) · Drug Metabolism Reviews · doi:10.1080/03602532.2021.1955916 · Cited by 16 · see citing works
“…intestinal epithelial cells, keratinocytes, Langerhans cells, and hematopoietic stem cells, to name a few (Haas et al. 2016; Li et al. 2017; Bennett et al. 2018; Metidji et al. 2018; Hong et al. 2020) This mouse has been a vital tool in untangling the complicated cell-specific role of AHR.”
Method
- Authors
- Bennett, J. A., Singh, K. P., Welle, S. L., Boule, L. A., Lawrence, B. P., & Gasiewicz, T. A.
- Affiliations
- University of Rochester Medicine (US)
- Corresponding author
- Gasiewicz, Thomas A.
- Venue
- PLOS ONE
- Publisher
- Public Library of Science (PLoS)
- Published
- 2018-11-02
- Volume
- 13
- Issue
- 11
- Pages
- e0206407
- ISSN
- 1932-6203 (ISSN-L)
- PMC
- PMC6214519
- OpenAlex
- W2899468957
- Cited by
- 25
- References
- 2
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 4 · 2023: 1 · 2022: 3 · 2021: 6 · 2020: 4 · 2019: 4
- FWCI
- 2.51
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- PLoS ONE (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Figshare (submittedVersion, cc-by)
- Funders
- National Institutes of Health (P30 ES01247, T32ES07026, ES023068, ES04862)
- Topics
- Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Blood disorders and treatments
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
- Keywords
- aryl hydrocarbon receptor, hematopoietic stem cells, conditional gene deletion, Vav1, hematopoiesis, gene expression profiling, mesenchymal stem cells, myeloproliferative neoplasms, AhR knockout mice, LSK cells, environmental chemical exposure
- MeSH terms
- Animals, Hematopoietic Stem Cells, Phenotype, Signal Transduction, Gene Deletion, Receptors, Aryl Hydrocarbon, Mice, Basic Helix-Loop-Helix Transcription Factors, Basic Helix-Loop-Helix Proteins, Transcriptome
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