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Effects of fly ash inhalation on murine immune function: effects on systemic response

Journal Article · · Environ. Res.; (United States)

Mice were exposed to fly ash at levels ranging from 728-2221 ..mu..g/m/sup 3/ respirable for varying periods of time, and several immunological parameters were measured. Little change was noted in splenic response to mitogens or cytolytic ability. Splenic lymphocytes from fly ash-exposed mice incorporated significantly more thymidine following subcutaneous sensitization with BCG, although no differences were noted in response of these lymphocytes to PPD. Fly ash exposure of greater than 1 week caused a suppression of antibody response to aerosols of Escherichia coli in the spleen, but not in the mediastinal lymph nodes. Following 3-4 weeks of fly ash exposure, no changes in splenic antibody responses were noted following intravenous injections of LPS or intratracheal injections of DNP-Ficoll. However, after 9 months exposure at higher concentrations of fly ash, splenic plaque-forming responses were significantly suppressed after both aerosol and intratracheal exposure to antigen.

OSTI ID:
6373607
Journal Information:
Environ. Res.; (United States), Journal Name: Environ. Res.; (United States) Vol. 28:2; ISSN ENVRA
Country of Publication:
United States
Language:
English