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Updated: Aug 26, 2026
Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells
Published on: February 22, 2020
Analysis of the natural killer mediated immune response in metastatic renal cell carcinoma patients
Asma Gati1, Sylvie Da Rocha, Nadia Guerra
1INSERM, Institut Gustave Roussy, Villejuif, France.
Abstract:
Metastatic renal cell carcinomas (MRCC) are considered as immunogeneic tumors on the basis of the clinical responses observed in patients treated by IL-2. However, renal cell carcinoma patients are also characterized by alterations of the immune response that may compromise the immunotherapeutic approaches. In our study, we have studied the phenotype and the functional capacities of peripheral NK cells in a panel of neprectomized metastatic renal cell carcinoma patients. NK cells were harvested by negative immunoselection from fresh peripheral blood samples. In most of MRCC patients analysed (23/28), the expression of NCR (NKp46 and NKp30) was similar to that of donors. Lytic capacities by activated immunoselected NK cells from MRCC patients assessed against K562 and 3 renal tumor cell lines were in the range of that observed in NK cells from normal donors. HLA-I- renal tumor cells UOK23 were killed with a good efficiency, whereas HLA-I renal tumor cells were more resistant. Although LFA-1/ICAM-1 interaction potentiates RCC cell lysis, HLA-I/NKR interaction clearly decreased RCC cell susceptibility to NK cells. In addition, proliferation of NK cells from MRCC patients in response to cytokines was altered.
Insights
Metastatic renal cell carcinoma (MRCC) patients show altered natural killer (NK) cell proliferation. Despite normal NK cell expression and function against some tumors, resistance to NK cell-mediated lysis was observed in specific renal tumor cells.
Area of Science:
- Immunology
- Oncology
- Cell Biology
Background:
- Metastatic renal cell carcinoma (MRCC) exhibits immunogenicity, yet immune alterations can impede immunotherapy.
- Natural Killer (NK) cells play a crucial role in anti-tumor immunity.
Purpose of the Study:
- To investigate the phenotype and function of peripheral NK cells in nephrectomized MRCC patients.
- To assess NK cell-mediated lysis of renal tumor cells and identify factors influencing susceptibility.
Main Methods:
- Peripheral blood NK cells were isolated using negative immunoselection from MRCC patients and healthy donors.
- NK cell phenotype (NCR expression) and functional capacities (cytotoxicity against tumor cell lines) were analyzed.
- The impact of HLA-I expression and LFA-1/ICAM-1 interactions on NK cell-mediated lysis was evaluated.
Main Results:
- Most MRCC patients (23/28) displayed normal expression of NK cell receptors (NKp46, NKp30).
- Activated NK cells from MRCC patients showed comparable lytic activity against K562 and renal tumor cell lines to controls.
- HLA-I- renal tumor cells (UOK23) were efficiently killed, while HLA-I+ renal tumor cells showed resistance.
- LFA-1/ICAM-1 interaction enhanced RCC cell lysis, whereas HLA-I/NKR interaction decreased susceptibility.
- NK cell proliferation in response to cytokines was altered in MRCC patients.
Conclusions:
- NK cells in MRCC patients exhibit altered proliferation and differential susceptibility of renal tumor cells to lysis.
- Tumor cell HLA-I expression significantly impacts NK cell-mediated killing.
- These findings highlight immune dysregulation in MRCC that could affect immunotherapy outcomes.
