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Transfer of Manipulated Tumor-associated Neutrophils into Tumor-Bearing Mice to Study their Angiogenic Potential In Vivo
Published on: July 20, 2019
Type I IFN contributes to NK cell homeostasis, activation, and antitumor function
Jeremy B Swann1, Yoshihiro Hayakawa, Nadeen Zerafa
1Cancer Immunology Program, Trescowthick Laboratories, Peter MacCallum Cancer Centre, St. Andrews Place, East Melbourne, 8006 Victoria, Australia.
Journal of Immunology (Baltimore, Md. : 1950)
|June 6, 2007
Summary
Endogenous type I interferons (IFNs) are crucial for natural killer (NK) cell antitumor activity. This study shows type I IFNs regulate NK cell function and are vital for controlling tumor growth and immunotherapy effectiveness.
Area of Science:
- Immunology
- Cancer Biology
- Virology
Background:
- Type I interferons (IFNs) are critical immune modulators.
- Natural killer (NK) cells play a significant role in antitumor immunity.
Purpose of the Study:
- To investigate the role of endogenous type I IFNs in regulating NK cell antitumor responses.
- To determine the impact of type I IFNs on NK cell number, activation, and cytotoxic activity in various tumor models.
Main Methods:
- Utilized IFNAR1- and IFNAR2-deficient mice.
- Employed an IFNAR1-blocking antibody.
- Assessed NK cell-mediated antitumor activity in methylcholanthrene-induced sarcomas, RMA-S tumors, and lung metastasis models.
- Evaluated the efficacy of cytokine immunotherapy (IL-12, IL-18, IL-21, IL-2) in the absence of type I IFNs.
Main Results:
- Endogenous type I IFNs are critical regulators of NK cell numbers, activation, and antitumor functions across multiple experimental tumor models.
- Type I IFN-mediated protection against RMA-S tumors was more potent than that of other effector molecules like IFN-gamma, IL-12, IL-18, and perforin.
- Cytokine immunotherapies with IL-12, IL-18, and IL-21 remained effective without endogenous type I IFNs.
- The antimetastatic activity of IL-2 was significantly impaired in IFNAR-deficient mice due to defective IL-2-induced cytotoxicity.
Conclusions:
- Endogenous type I IFNs are central mediators of NK cell antitumor responses.
- Type I IFNs are essential for optimal NK cell function and efficacy in various cancer settings.
- Targeting type I IFN pathways could be a strategy to enhance NK cell-based cancer immunotherapies.
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