Flohr T, Bange FC, von Euch A, Kiekenbeck M, Böttger EC. Depletion of tryptophan is not involved in expression of tryptophanyl-tRNA synthetase mediated by interferon.
Infect Immun 1992;
60:4418-21. [PMID:
1398953 PMCID:
PMC257482 DOI:
10.1128/iai.60.10.4418-4421.1992]
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Abstract
Gamma interferon (IFN-gamma) affects tryptophan metabolism by mediating the expression of indoleamine 2,3-dioxygenase and tryptophanyl-tRNA synthetase. In the present study, we investigated the role of indoleamine 2,3-dioxygenase-mediated tryptophan depletion in the induction of tryptophanyl-tRNA synthetase by IFN-gamma. The addition of excess tryptophan to the culture medium did not affect the induction of tryptophanyl-tRNA synthetase by IFN-gamma, indicating that tryptophan degradation is not directly involved in the IFN-gamma-mediated expression of tryptophanyl-tRNA synthetase.
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