Abstract
Cyclophosphamide dissolved in several dilutions of chocolate milk was presented for 20 hr daily to nondeprived, symptomatic, autoimmune Mrl-lpr/lpr and asymptomatic Mrl +/+ mice. In the absence of cyclophosphamide, daily consumption was inversely related to the concentration of the chocolate milk solutions and increased from the first to the fourth day of exposure. There were no effects of strain or sex on the consumption of plain chocolate milk. Consumption of 0.1 or 0.2 mg cyclophosphamide per ml of different dilutions of chocolate milk increased over days 1–4 and decreased on day 8. Consumption of 0.4 mg/ml cyclosphosphamide did not change over days. Generally, consumption was inversely related to the cyclophosphamide concentration. Females consumed more cyclophosphamide than males. Autoimmune lpr/lpr mice consumed more cyclophosphamide than +/+ mice. Dilution of chocolate milk had no effect on consumption of cyclophosphamide. Lymphoproliferation and anti-ssDNA antibody titer were reduced by the consumption of cyclophosphamide-chocolate milk solutions. It is hypothesized that autoimmune lpr/lpr mice voluntarily consume more cyclophosphamide than asymptomatic +/+ mice in an effort to “correct” their immune system dysregulation.
Published Version
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