Recently 875 cases (4 fatal) of eosinophilia-mylagia-syndrome (EMS) has been reported in the U.S.A. There appears to be an association with ingestion of tryptophan or certain lots of tryptophan. The purpose of this study is to determine if one or more of the several lots of L-tryptophan submitted by the Center of Disease Control (CDC) has the potential to cause toxicity in female B6C3F1 ice. Mice were given L-tryptophan in 0.5% methylcellulose-water at doses of 0 or 300mg/kg B.W. daily from Monday to Friday for 21 days over a 30-day period by gavage. Animals were killed at 3, 17 and 30 days after the first treatment. Multiple hematological and clinical pathology examinations were performed during the dosing with histopathological and hematopoietic evaluations at the terminal sacrifice. The results of this study provided no indication of toxicity in mice that could be interpreted as related to the EMS as seen in man. The B6C3F1 mouse may be not be a sensitive model or the lots tested may not contain the contaminant(s) that causes EMS in man.

Agency
National Institute of Health (NIH)
Institute
National Institute of Environmental Health Sciences (NIEHS)
Type
Intramural Research (Z01)
Project #
1Z01ES021126-01
Application #
3876875
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
1
Fiscal Year
1990
Total Cost
Indirect Cost
City
State
Country
United States
Zip Code