Related Experiment Videos
Immunological effects of in vitro hyperthermia
A Yoshioka1, Y Miyachi, S Imamura
1Department of Dermatology, Faculty of Medicine, Kyoto University, Japan.
Journal of Clinical & Laboratory Immunology
|June 1, 1989
Summary
Hyperthermia treatment in vitro significantly reduces immune cell function, including natural killer (NK) cell activity and phytohemagglutinin (PHA)-induced blastogenesis, impacting cancer therapy considerations.
Area of Science:
- Immunology
- Cancer Therapy
- Cell Biology
Background:
- Hyperthermia is a cancer treatment modality.
- The impact of hyperthermia on immune cell function requires further investigation.
Purpose of the Study:
- To investigate the in vitro effects of hyperthermia on human peripheral blood mononuclear cells (PBMC).
- To evaluate the potential immunosuppressive effects of hyperthermia.
Main Methods:
- Human PBMCs were subjected to in vitro hyperthermia treatment at varying temperatures.
- PBMC viability, natural killer (NK) cell activity, and phytohemagglutinin (PHA)-induced blastogenesis were assessed.
Main Results:
- PBMC viability showed a slight, statistically insignificant reduction in a temperature-dependent manner.
- Both NK cell activity and PHA-induced blastogenesis were significantly reduced by hyperthermia in a temperature-dependent manner.
- At 44°C, NK activity dropped to 4.3%, and PHA-induced blastogenesis was completely inhibited.
- Reduced NK activity correlated with a decrease in specific NK cell subpopulations (Leu 7-1, 11+ and Leu 7+, 11+).
Conclusions:
- In vitro hyperthermia exhibits immunosuppressive effects on human PBMCs.
- The reduction in immune function, particularly NK cell activity, suggests a need to consider host immune system inhibition during clinical hyperthermia cancer treatment.