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Suppression of the generation of lymphokine-activated killer (LAK) cells by serum-free supernatants of in vitro maintained tumour cell lines.
Serum-free supernatants from in vitro maintained gastrointestinal cancer and melanoma cell lines inhibit the generation of lymphokine (IL-2) activated killer (LAK) cells in a time and dose-related manner. Concentrations as low as 5% can inhibit the generation of LAK cytotoxicity but inhibition of pr...
Autores principales: | , , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
1989
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2247131/ https://www.ncbi.nlm.nih.gov/pubmed/2785396 |
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author | Guillou, P. J. Ramsden, C. W. Somers, S. S. Sedman, P. C. |
author_facet | Guillou, P. J. Ramsden, C. W. Somers, S. S. Sedman, P. C. |
author_sort | Guillou, P. J. |
collection | PubMed |
description | Serum-free supernatants from in vitro maintained gastrointestinal cancer and melanoma cell lines inhibit the generation of lymphokine (IL-2) activated killer (LAK) cells in a time and dose-related manner. Concentrations as low as 5% can inhibit the generation of LAK cytotoxicity but inhibition of proliferation is not observed until higher concentrations are included in the culture system. Inhibition is not observed with supernatants from a breast cancer cell line nor with supernatants from normal cells. There was complete concordance between the capacity of the tumour cells themselves to inhibit LAK generation and the presence of inhibitory activity in the corresponding supernatant. The inhibitory factor(s) is stable after heating to 44 and 56 degrees C. Production of the inhibitory factor(s) is sensitive to metabolic inhibitors and has a molecular weight greater than 25 kD. The inhibition of LAK cell stimulation by tumour cells may partially explain the failure of adoptively transferred LAK cells and IL-2 therapy to cause tumour regression in man. |
format | Text |
id | pubmed-2247131 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1989 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-22471312009-09-10 Suppression of the generation of lymphokine-activated killer (LAK) cells by serum-free supernatants of in vitro maintained tumour cell lines. Guillou, P. J. Ramsden, C. W. Somers, S. S. Sedman, P. C. Br J Cancer Research Article Serum-free supernatants from in vitro maintained gastrointestinal cancer and melanoma cell lines inhibit the generation of lymphokine (IL-2) activated killer (LAK) cells in a time and dose-related manner. Concentrations as low as 5% can inhibit the generation of LAK cytotoxicity but inhibition of proliferation is not observed until higher concentrations are included in the culture system. Inhibition is not observed with supernatants from a breast cancer cell line nor with supernatants from normal cells. There was complete concordance between the capacity of the tumour cells themselves to inhibit LAK generation and the presence of inhibitory activity in the corresponding supernatant. The inhibitory factor(s) is stable after heating to 44 and 56 degrees C. Production of the inhibitory factor(s) is sensitive to metabolic inhibitors and has a molecular weight greater than 25 kD. The inhibition of LAK cell stimulation by tumour cells may partially explain the failure of adoptively transferred LAK cells and IL-2 therapy to cause tumour regression in man. Nature Publishing Group 1989-04 /pmc/articles/PMC2247131/ /pubmed/2785396 Text en https://creativecommons.org/licenses/by/4.0/This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Research Article Guillou, P. J. Ramsden, C. W. Somers, S. S. Sedman, P. C. Suppression of the generation of lymphokine-activated killer (LAK) cells by serum-free supernatants of in vitro maintained tumour cell lines. |
title | Suppression of the generation of lymphokine-activated killer (LAK) cells by serum-free supernatants of in vitro maintained tumour cell lines. |
title_full | Suppression of the generation of lymphokine-activated killer (LAK) cells by serum-free supernatants of in vitro maintained tumour cell lines. |
title_fullStr | Suppression of the generation of lymphokine-activated killer (LAK) cells by serum-free supernatants of in vitro maintained tumour cell lines. |
title_full_unstemmed | Suppression of the generation of lymphokine-activated killer (LAK) cells by serum-free supernatants of in vitro maintained tumour cell lines. |
title_short | Suppression of the generation of lymphokine-activated killer (LAK) cells by serum-free supernatants of in vitro maintained tumour cell lines. |
title_sort | suppression of the generation of lymphokine-activated killer (lak) cells by serum-free supernatants of in vitro maintained tumour cell lines. |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2247131/ https://www.ncbi.nlm.nih.gov/pubmed/2785396 |
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