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Lymphokine-activated killer (LAK)-mediated lysis of sequentially isolated ovarian cancer cell lines
C M Yashar1, D D Taylor, R K Gibb
1Department of Obstetrics and Gynecology, University of Louisville School of Medicine, KY 40202, USA.
Problem:
Understanding immunologic eradication of cancer is hampered by failure to explore tumor evolution. Cell surface molecules may alter with therapy and disease progression. These alterations can translate into variable susceptibility to immune-mediated cell lysis.
Method Of Study:
Cell lines from a patient with ovarian carcinoma isolated at surgical debulking (UL-3A), during chemotherapy (UL-3B), and after progression (UL-3C) were used to study changes in cell lysis by natural killer (NK) and lymphokine-activated killer (LAK) cells. The role of adhesion molecules ICAM-1, LFA-3, and glycoproteins in the demonstrated differential killing was also examined.
Results:
An inverse relationship between attachment and lysis was demonstrated. UL-3C, the most sensitive to lysis (50%), attached the least lymphocytes (40%), whereas UL-3A, the least sensitive (33%), attached the most lymphocytes (71%). A correlation with ICAM-1 and LFA-3 expression was not demonstrated.
Conclusion:
Ovarian cancer cells evolve throughout the disease course, and this may manifest as differential sensitivity to immune-mediated cell lysis.
Insights
Ovarian cancer cells change during treatment, affecting their susceptibility to immune cell attacks. This evolution impacts how effectively natural killer (NK) and lymphokine-activated killer (LAK) cells can eliminate cancer cells.
Area of Science:
- Immunology
- Oncology
- Cell Biology
Background:
- Understanding cancer's immune evasion is crucial for effective treatment.
- Tumor evolution and changes in cell surface molecules can alter cancer cell susceptibility to immune-mediated lysis.
Purpose of the Study:
- To investigate how ovarian carcinoma cell lines evolve throughout disease progression.
- To examine the differential susceptibility of these evolving cell lines to natural killer (NK) and lymphokine-activated killer (LAK) cell-mediated lysis.
Main Methods:
- Utilized ovarian carcinoma cell lines (UL-3A, UL-3B, UL-3C) isolated at different disease stages.
- Assessed cell lysis by NK and LAK cells.
- Investigated the role of adhesion molecules (ICAM-1, LFA-3) and glycoproteins.
Main Results:
- Demonstrated an inverse relationship between lymphocyte attachment and cell lysis.
- The most progressed cell line (UL-3C) showed highest lysis (50%) but least attachment (40%).
- The earliest cell line (UL-3A) showed least lysis (33%) but highest attachment (71%).
Conclusions:
- Ovarian cancer cells undergo evolution during the disease course.
- This evolution results in differential sensitivity to immune-mediated cell lysis, impacting therapeutic strategies.