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Published on: February 25, 2007
The Role of Interferon-Gamma in Hematopoietic Stem Cell Development, Homeostasis, and Disease
Daniel E Morales-Mantilla1, Katherine Y King1,2
11Program in Immunology and Center for Cell and Gene Therapy, Section of Infectious Diseases, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030 USA.
Purpose Of Review:
Interferon-gamma (IFN-γ) is a pro-inflammatory cytokine that participates in the regulation of hematopoietic stem cells (HSC) during development and under homeostatic conditions. IFN-γ also plays a key pathogenic role in several diseases that affect hematopoiesis including aplastic anemia, hemophagocytic lymphohistiocytosis, and cirrhosis of the liver.
Recent Findings:
Studies have shown that increased IFN-γ negatively affects HSC homeostasis, skewing HSC towards differentiation over self-renewal and eventually causing exhaustion of the HSC compartment.
Summary:
Here, we explore the mechanisms by which IFN-γ regulates HSC in both normal and pathological conditions. We focus on the role of IFN-γ signaling in HSC fate decisions, and the transcriptional changes it elicits. Elucidating the mechanisms through which IFN-γ regulates HSCs may lead to new therapeutic options to prevent or treat adverse hematologic effects of the many diseases to which IFN-γ contributes.
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