Lymphokine-activated killer cells: determination of their tumor cytolytic capacity by a clonogenic microassay using agar capillaries
| Autor: | Christine Echarti, H. Rainer Maurer |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Cytotoxicity
Immunologic food.ingredient Immunology Cell Dose-Response Relationship Immunologic Biology Lymphocyte Activation Peripheral blood mononuclear cell Colony-Forming Units Assay food medicine Humans Immunology and Allergy Agar Killer Cells Lymphokine-Activated Clonogenic assay Lymphokine-activated killer cell Lymphokine Molecular biology Squamous carcinoma Cytolysis medicine.anatomical_structure Carcinoma Squamous Cell Interleukin-2 Immunotherapy |
| Zdroj: | Journal of Immunological Methods. 143:41-47 |
| ISSN: | 0022-1759 |
| DOI: | 10.1016/0022-1759(91)90270-p |
| Popis: | A lymphokine activated killer (LAK) cell assay has been developed using a clonogenic microassay in agar-containing capillaries with KB tumor target cells. The assay avoids the problems of the commonly used 51Cr release assay and mimics physiological conditions more closely. The assay procedure has been optimized, resulting in the following conditions: LAK cells are generated by incubating nonadherent peripheral blood mononuclear cells from normal donors with 20 U/ml interleukin-2 for 3 days and cocultivated with 104 KB human squamous carcinoma cells/ml at 5:1, 10:1, and 20:1 effector: target ratios for 24 h. The cocultivation mixture is then seeded into agar-containing glass capillaries, allowing undamaged tumor cells to form colonies. The colony number is proportional to the number of tumor cells seeded. The present microassay requires up to 90% less cells and agent quantities compared with other clonogenic assays. It thus provides a useful tool to quantitate LAK cell activity and its alteration by immunomodulatory agents. |
| Databáze: | OpenAIRE |
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