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The effects of 2.35-T MR imaging on natural killer cell cytotoxicity with and without interleukin-2

N Prasad1, E Lotzová, J I Thornby

  • 1Department of Radiology, Baylor College of Medicine, Houston, TX 77030.

Radiology
|April 1, 1990
PubMed

Insights

Magnetic resonance (MR) imaging does not affect natural killer (NK) cell cytotoxicity in human peripheral blood mononuclear cells (PBMC). Furthermore, MR imaging exposure does not alter the effectiveness of interleukin-2 (IL-2) in enhancing NK cell activity.

Area of Science:

  • Immunology
  • Biophysics
  • Oncology

Background:

  • Natural killer (NK) cells are crucial for innate immunity and cancer surveillance.
  • Magnetic resonance (MR) imaging is a widely used diagnostic tool.
  • The potential impact of MR imaging on immune cell function requires investigation.

Purpose of the Study:

  • To investigate the effects of MR imaging on NK cell cytotoxicity.
  • To determine if MR imaging exposure alters the efficacy of interleukin-2 (IL-2) in enhancing NK cell activity.

Main Methods:

  • Human peripheral blood mononuclear cells (PBMC) were exposed to a 2.35-T static magnetic field for 50 minutes.
  • NK cell cytotoxicity was measured using the chromium-51-release assay against K-562, OV-2774, and Clone-A cancer cells.
  • PBMC were treated with IL-2 to assess its synergistic effect with MR imaging.

Main Results:

  • NK cell cytotoxicity varied against different cancer cell lines (K-562 > Clone-A).
  • MR imaging exposure did not significantly alter NK cell cytotoxicity against any tested cancer cell line.
  • IL-2 treatment enhanced NK cell cytotoxicity, and this enhancement was not affected by prior MR imaging exposure.

Conclusions:

  • MR imaging exposure does not impair NK cell cytotoxic function.
  • MR imaging does not interfere with the immunomodulatory effects of IL-2 on NK cells.
  • These findings suggest MR imaging is safe for patients with regard to NK cell mediated immunity.

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