An assay was developed to detect the cytotoxic effects of cytokines on rat pancreatic islet cells in monolayer culture. Cell lysis was detected by a 51Cr-release assay after 4 days of incubation with various cytokines. When tested alone, murine (rat and mouse) interferon-γ (mIFN-γ) produced a small dose-dependent lysis of islet cells; human IFN-γ, mouse IFN-α/β, interleukins 1 and 2 (IL-1 and IL-2), tumor necrosis factor (TNF), and lymphotoxin (LT) were inactive. When added together, the following combinations of cytokines showed synergistic cytotoxic effects: TNF (or LT) plus IL-1, TNF (or LT) plus mIFN-γ, and IL-1 plus mIFN-γ. These results indicate that the cytokine products of mononuclear cells of the immune system, IFN-γ, TNF, LT, and IL-1 have strong synergistic cytotoxic effects on islet cells and therefore may act as direct chemical mediators of islet β-cell destruction in type I (insulin-dependent) diabetes.
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January 01 1988
Destruction of Rat Islet Cell Monolayers by Cytokines: Synergistic Interactions of Interferon-γ, Tumor Necrosis Factor, Lymphotoxin, and Interleukin 1
Clifford Pukel;
Clifford Pukel
Department of Medicine, University of Miami School of Medicine
Miami, Florida
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Hernan Baquerizo;
Hernan Baquerizo
Department of Medicine, University of Miami School of Medicine
Miami, Florida
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Alexander Rabinovitch
Alexander Rabinovitch
Department of Medicine, University of Miami School of Medicine
Miami, Florida
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Address correspondence and reprint requests to Alexander Rabinovitch, MD, Department of Medicine (R-134), P.O. Box 016960, Miami, FL 33101.
Diabetes 1988;37(1):133–136
Article history
Received:
October 16 1987
Accepted:
October 22 1987
Citation
Clifford Pukel, Hernan Baquerizo, Alexander Rabinovitch; Destruction of Rat Islet Cell Monolayers by Cytokines: Synergistic Interactions of Interferon-γ, Tumor Necrosis Factor, Lymphotoxin, and Interleukin 1. Diabetes 1 January 1988; 37 (1): 133–136. https://doi.org/10.2337/diab.37.1.133
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