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An Intrinsic Interferon Program Protects Stem Cells from Viral Infection.
1Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany; Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany.
Developmental Cell
|February 7, 2018
Summary
Stem cells possess high interferon-stimulated gene (ISG) expression but resist interferon signaling, a mechanism that safeguards their integrity against viral threats.
Area of Science:
- Immunology
- Stem Cell Biology
- Virology
Background:
- Stem cell integrity is crucial for tissue homeostasis and regeneration.
- Interferon signaling is a key antiviral defense mechanism.
- Understanding how stem cells balance self-renewal with defense is vital.
Purpose of the Study:
- To investigate the protective mechanisms of stem cells against viral infections.
- To elucidate the role of interferon-stimulated genes (ISGs) in stem cell defense.
- To determine why stem cells are refractory to acute interferon signaling.
Main Methods:
- Analysis of intrinsic interferon-stimulated gene (ISG) expression in stem cells.
- Assessment of stem cell response to acute interferon signaling.
- Evaluation of stem cell susceptibility to viral infection under different interferon signaling conditions.
Main Results:
- Stem cells exhibit high intrinsic expression of interferon-stimulated genes (ISGs).
- Despite high ISG levels, stem cells remain refractory to acute interferon signaling.
- This refractoriness protects stem cells from viral infection without compromising their integrity.
Conclusions:
- Stem cells employ a unique strategy of high ISG expression coupled with signaling refractoriness for antiviral protection.
- This mechanism ensures stem cell integrity is maintained during immune responses.
- The findings offer insights into stem cell biology and potential therapeutic strategies against viral diseases affecting stem cell populations.
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