Book chapter
Cytotoxicity and membrane damage in vitro by inclusion complexes between gamma-cyclodextrin and siloxanes
Immunology of Silicones, pp.93-99
Current topics in microbiology and immunology, 210, Springer
1996
DOI: 10.1007/978-3-642-85226-8_10
PMID: 8565593
Abstract
Inclusion complexes of gamma-cyclodextrin and octamethylcyclotetrasiloxane (D4), decamethyltetrasiloxane (M10TS), and 1,3,5,7-tetramethyltetravinylcyclotetra - siloxane (TMTV-D4) were prepared to compare the cytotoxic effects of siloxanes in vitro. In these preparations, the hydrophobic siloxanes are surrounded by a hydrophilic shell of eight circularly linked D-glucose molecules (gamma-cyclodextrin), and upon contact with plasma membranes the siloxane molecule can intercalate into the lipid bilayer of the cell membrane. XRPC24, 2-11 plasmacytoma, CH12.LX lymphoma and P388D1 macrophage-like cells were used as indicator cells in toxicity assays. Using an MTT tetrazolium reduction to formazan test, a colorimetric method to determine the number of viable cells, the 50% minimal lethal doses (CD50) for the siloxane compounds were found to range from 30 to 50 microM. Sublethal doses (e.g., 15 microM and lower) resulted in the loss of lactate dehydrogenase (LDH) and glutathione (GSH) from the cytosolic compartment of the target cells and thus indicated cytotoxicity. Treatment of macrophages with siloxanes resulted in a higher production of interleukin-6 (IL-6) than was exhibited by untreated macrophages. The B9 cell bioassay of these treated cells showed as much as a 10 fold higher production (500 U/ml) of IL-6 than did the untreated cells. The degree of increase was dependent on the compound and concentration used. The results of this study show that low molecular weight siloxanes produce lethal effects on B-lymphocyte derived target cells in vitro and permeabilize the plasma membranes at lower sublethal concentrations.
Details
- Title: Subtitle
- Cytotoxicity and membrane damage in vitro by inclusion complexes between gamma-cyclodextrin and siloxanes
- Creators
- K Felix - Institut für Klinische Molekularbiologie und Tumorgenetik, Hämatologikum, GSF, München, GermanyS JanzJ PithaJ A WilliamsE B MushinskiG W BornkammM Potter
- Resource Type
- Book chapter
- Publication Details
- Immunology of Silicones, pp.93-99
- Publisher
- Springer; Berlin ; Heidelberg
- Series
- Current topics in microbiology and immunology; 210
- DOI
- 10.1007/978-3-642-85226-8_10
- PMID
- 8565593
- ISSN
- 0070-217X
- Language
- English
- Date published
- 1996
- Academic Unit
- Pathology
- Record Identifier
- 9984083237602771
Metrics
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