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Humoral immunodepression following acute NO/sub 2/ exposure in normal and adrenalectomized mice

Journal Article · · J. Toxicol. Environ. Health; (United States)
The effects following 20 ppm NO/sub 2/ exposure on humoral immunity were investigated in C57BI/6 mice after 48, 72, and 96 h exposure. Both spleen plaque-forming cell (PFC) responses and serum hemagglutinins (HA) using sheep red blood cells (SRBC) as antigen were studied. Splenic and thymic weight and cellularity decreased on acute exposure to NO/sub 2/. PFC were markedly depressed after 48 h exposure and continued to decrease as exposure time was lengthened. HA titers were also depressed. The same significant suppression of PFC and HA titers was observed in adrenalectomized mice after 96 h NO/sub 2/ exposure. The depression of humoral immunity in NO/sub 2/-exposed mice was independent of stress-induced endogeneous steroids.
Research Organization:
INSERM Hospital Claude Bernard, Paris, France
OSTI ID:
5353161
Journal Information:
J. Toxicol. Environ. Health; (United States), Journal Name: J. Toxicol. Environ. Health; (United States) Vol. 15:1; ISSN JTEHD
Country of Publication:
United States
Language:
English