Evaluation of the immune system in rats and mice administered linear ammonium perfluorooctanoate
| Autor: | Steven R. Frame, Scott E. Loveless, Greg P. Sykes, Denise Hoban, Nancy E. Everds |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Male
medicine.medical_specialty No-observed-adverse-effect level Spleen Thymus Gland Biology Toxicology Rats Sprague-Dawley chemistry.chemical_compound Mice Immune system Corticosterone Internal medicine medicine Animals PPAR alpha Fluorocarbons Mice Inbred ICR No-Observed-Adverse-Effect Level Dose-Response Relationship Drug Body Weight Organ Size Lipids Blood Cell Count Rats Dose–response relationship Red blood cell medicine.anatomical_structure Lymphatic system Endocrinology chemistry Immunoglobulin M Liver Immune System Histopathology Caprylates |
| Zdroj: | Toxicological sciences : an official journal of the Society of Toxicology. 105(1) |
| ISSN: | 1096-0929 |
| Popis: | Repeated high doses of ammonium perfluorooctanoate (APFO) have been reported to affect immune system function in mice. To examine dose-response characteristics in both rats and mice, male CD rats and CD-1 mice were dosed by oral gavage with 0.3-30 mg/kg/day of linear APFO for 29 days. Anti-sheep red blood cell (SRBC) IgM levels, clinical signs, body weights, selected hematology, and lipid parameters, liver weights, spleen, and thymus weights and cell number, selected histopathology, and serum corticosterone concentrations were evaluated. In rats, linear APFO had no effect on production of anti-SRBC antibodies. Ten and 30 mg/kg/day resulted in systemic toxicity as evidenced by decreases in body weight gain to 74 and 37%, and increases in serum corticosterone levels to 135 and 196% of control, respectively. In mice dosed with 10 and 30 mg/kg/day, marked systemic toxicity and stress were observed, as evidenced by a loss in body weight of 3.8 and 6.6 g, respectively (despite a tripling of liver weight), approximately 230% increase in serum corticosterone, and increases in absolute numbers of peripheral blood neutrophils and monocytes with an accompanying decrease in absolute lymphocyte numbers. Immune-related findings at 10 and 30 mg/kg/day that likely represent secondary responses to the systemic toxicity and stress observed at these doses include: decreased IgM antibody production at 10 (20% suppression) and 30 mg/kg/day (28% suppression); decreased spleen and thymus weights and cell numbers; microscopic depletion/atrophy of lymphoid tissue at 10 (thymus) and 30 mg/kg/day (spleen). In summary, no immune-related changes occurred in rats, even at doses causing systemic toxicity. In mice, immune-related changes occurred only at doses causing significant and profound systemic toxicity and stress. |
| Databáze: | OpenAIRE |
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