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Natural killer cell function in children with malignant solid neoplasias
S Gallego-Melcón1, T Español Boren, J Sanchez de Toledo
1Unidad de Oncologia Pediátrica, Hospital Infantil Valle Herbrón, Barcelona, Spain.
Medical and Pediatric Oncology
|January 1, 1991
Summary
Children with progressive solid tumors exhibit lower natural killer (NK) cell activity at diagnosis. This suggests NK cells are crucial for controlling cancer growth and may benefit from immunomodulation therapies.
Area of Science:
- Immunology
- Pediatric Oncology
- Cellular Biology
Background:
- Natural killer (NK) cells are crucial for innate immunity and cancer surveillance.
- Assessing NK cell function in pediatric cancer patients is vital for understanding disease progression and treatment response.
Purpose of the Study:
- To evaluate natural killer (NK) cell numbers and cytotoxic activity in children diagnosed with solid tumors.
- To determine the correlation between NK cell function and tumor stage, type, and response to therapy.
Main Methods:
- NK cell numbers were quantified using the NKH-1 monoclonal antibody.
- NK cell lytic activity was measured against K562 target cells.
- Patient data were analyzed at diagnosis and during follow-up (median 15.8 months).
Main Results:
- NK cell numbers and activity were similar across different tumor types and stages (localized vs. advanced).
- Patients with progressive disease (Group 3) showed significantly lower NK cell activity at diagnosis compared to those in remission (Groups 1 & 2) and controls (P=0.007).
Conclusions:
- Impaired NK cell lytic capacity in vitro is associated with progressive disease in children with solid tumors.
- NK cells likely play a role in controlling neoplastic growth in vivo.
- Children with refractory progressive disease may benefit from immunomodulatory therapies to enhance NK cell function.