1-mT, 1-methyl tryptophan, CD4, CD4(, CD4(+), CD4(+) T-helper cells, CD4+, CD4+ T-cell, HCs, HIV, HIV(+), HIV-infected, HIV/AIDS, IDO, IDO mRNA, Indoleamine, Indoleamine 2,3-dioxygenase, PBMC, PBMCs, T-, T-cell, Trp, amino acid, anti-CD4 Ab, dendritic cells, gp120, human immunodeficiency virus type-1, indoleamine, indoleamine 2,3-dioxygenase, interferon, interferon type I or type II, kyn, kynurenine, pDCs, patients, peripheral blood mononuclear cells, plasmacytoid dendritic cells, surviving cells, tryptophan