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Mild hyperthermia modulates biological activities of interferons
J Payne1, M P Nair, J L Ambrus
1Department of Molecular and Cellular Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA.
Summary
Mild hyperthermia significantly boosts the antiviral and anti-cancer effects of interferons (IFNs). This combination therapy shows promise for treating late-stage cancers by enhancing IFN efficacy in patients with weakened immune systems.
Area of Science:
- Immunology
- Biochemistry
- Oncology
Background:
- Interferons (IFNs) are crucial cytokines with antiviral and antiproliferative functions.
- Mild hyperthermia (around 39°C) is being explored for its potential synergistic effects with therapeutic agents.
Purpose of the Study:
- To investigate the combined effects of mild hyperthermia and interferons (IFNs) on cellular antiviral and antiproliferative activities.
- To explore the impact of hyperthermia on IFN production and natural killer (NK) cell activity.
Main Methods:
- Cells were treated with mild hyperthermia (39°C) during and prior to interferon assays.
- Interferon-induced enzyme activity (2,5-oligoadenylate synthetase) was measured.
- Antiviral, antiproliferative, IFN production, and NK cell activity were assessed under varying conditions.
Main Results:
- Mild hyperthermia significantly enhanced the antiviral activity of human IFNs (alpha, beta, gamma) and murine IFN-gamma.
- Pre-assay hyperthermia further augmented IFN antiviral effects and increased the activity of the 2,5-oligoadenylate synthetase enzyme.
- Hyperthermia increased IFN antiproliferative activity against tumor cells but decreased IFN production and suppressed IFN-mediated NK cell activity.
Conclusions:
- Mild hyperthermia potentiates the antiviral and antiproliferative activities of human interferons.
- Combining interferon therapy with mild hyperthermia is a promising strategy to enhance treatment efficacy, particularly for late-stage cancer patients.
- While hyperthermia affects IFN production and NK cell activity, its synergistic effect on IFN antiviral and antiproliferative functions is significant.