1-methyl-d-tryptophan

Pronunciation

Definition 1

A substance being studied in the treatment of melanoma and many other types of cancer. 1-methyl-d-tryptophan blocks the breakdown of the amino acid tryptophan, which is needed for T cells (a type of immune system cell) to kill tumor cells. Giving 1-methyl-d-tryptophan to patients who have received chemotherapy for cancer may help kill more tumor cells. It is a type of enzyme inhibitor and immunosuppressant. Also called D-1MT. (NCI Dictionary)

Definition 2

A methylated tryptophan with anti-immunosuppressive activity. 1-methyl-d-tryptophan inhibits the enzyme indoleamine 2,3-dioxygenase (IDO), which degrades the essential amino acid tryptophan, and may increase or maintain tryptophan levels important to T cell function. Tryptophan depletion is associated with immunosuppression involving T cell arrest and anergy. (NCI Thesaurus)

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