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Selective Harvesting of Marginating-hepatic Leukocytes
Published on: July 21, 2016
Morphofunctional characterization of lymphokine activated killer (LAK) cells in vitro
Insights
Peripheral blood lymphocytes cultured with interleukin-2 (IL-2) exhibited a "hand mirror shape" and potent cytotoxic antitumor activity. These cells, identified as CD3+, CD4+ T-lymphocytes, lacked hydrolytic enzymes in this in vitro study.
Area of Science:
- Immunology
- Cell Biology
- Biochemistry
Background:
- Interleukin-2 (IL-2) is a cytokine crucial for lymphocyte proliferation and function.
- Understanding the characteristics of IL-2-stimulated lymphocytes is vital for immunotherapy research.
Purpose of the Study:
- To characterize cellular subsets of peripheral blood lymphocytes cultured with IL-2 in vitro.
- To examine the morphological, functional, and immunological features of IL-2-stimulated lymphocytes.
Main Methods:
- In vitro culture of peripheral blood lymphocytes with conditioned medium from PHA-stimulated lymphocytes and recombinant IL-2 (rIL-2).
- Assessment of morphological changes, cytotoxic antitumor activity against tumoral lines, cytochemical properties, and CD marker expression.
Main Results:
- IL-2 stimulated lymphocytes displayed a distinct "hand mirror shape" morphology.
- These cells demonstrated significant cytotoxic antitumor activity.
- Lack of hydrolytic enzymes and a CD3+, CD4+ phenotype were observed.
Conclusions:
- In vitro IL-2 stimulation induces specific phenotypic and functional changes in lymphocytes.
- The identified CD3+, CD4+ lymphocytes possess cytotoxic potential against tumor cells, suggesting their role in anti-tumor immunity.
Abstract:
In order to characterize the cellular subsets of peripheral blood lymphocytes cultured with interleukin-2 (IL-2), a study in vitro was developed. Both conditioned medium from PHA-stimulated lymphocytes and recombinant IL-2 (rIL-2) were employed. The following aspects were examined: the morphological pattern of IL-2 stimulated lymphocytes; the ability of these cells to recognize, bind, attack and destroy tumoral lines; their cytochemical and immunological (CD) feature. The results suggest that, in our experimental conditions, these cells showed a characteristic "hand mirror shape", cytotoxic antitumor activity, lack of hydrolytic enzymes and CD3+, CD4+ phenotype.
