Apoptosis of tumor cells in lectin-dependent lymphokine-activated killer cell-mediated cytotoxicity

Haidong M Dong, R. Xing, L. Guo

Research output: Contribution to journalArticle

Abstract

By using DNA electrophoresis and propidium iodide (PI) staining flow cytometry (FACS) analysis, we studied the mechanisms of lymphokine-activated killer (LAK) cell-mediated cytotoxicity. In the presence of pokeweed mitogen (PWM), human LAK cells induced DNA fragmentation of two leukemic cell lines (U937 cells and Raji cells) and two solid tumor cell lines (SW1116 cells and Hep-2 cells), a hallmark of apoptosis. The reactions were carried out at the effector/target ratio of 1:1 and in 4 hr coculture. Pretreatment with RNA and protein synthesis inhibitors (actinomycin D and cycloheximide) did not prevent the target cells from apoptosis. As the TNF-resistant tumor cell lines such as SW1116 cells and Raji cells were also triggered to apoptosis, other factors than TNF would play the role. DNA-PI staining FACS analysis also suggested that a part of LAK cells underwent apoptosis to some extent during incubation with target cells. The results provide a new way to investigate the mechanisms of cytotoxicity of LAK cells and to enhance the efficacy of adoptive tumor therpay with LAK cells.

Original languageEnglish (US)
Pages (from-to)245-248
Number of pages4
JournalChinese Journal of Oncology
Volume17
Issue number4
StatePublished - 1995
Externally publishedYes

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Lymphokine-Activated Killer Cells
Lectins
Apoptosis
Neoplasms
Propidium
Tumor Cell Line
Staining and Labeling
Nucleic Acid Synthesis Inhibitors
Pokeweed Mitogens
U937 Cells
Protein Synthesis Inhibitors
DNA
Dactinomycin
DNA Fragmentation
Cycloheximide
Coculture Techniques
Electrophoresis
Flow Cytometry
Cell Line

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Apoptosis of tumor cells in lectin-dependent lymphokine-activated killer cell-mediated cytotoxicity. / Dong, Haidong M; Xing, R.; Guo, L.

In: Chinese Journal of Oncology, Vol. 17, No. 4, 1995, p. 245-248.

Research output: Contribution to journalArticle

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