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Nat. Rev. Nephrol. doi:10.1038/nrneph.2017.59
Figure 2 Altered tryptophan metabolism in clear cell renal cell carcinoma (ccRCC) Figure 2 | Altered tryptophan metabolism in clear cell renal cell carcinoma (ccRCC). In ccRCC, upregulation of tryptophan metabolism through the kynurenine (KN) pathway results in increased production of the immunosuppressive metabolites KN and quinolinate (QN). This pathway can be inhibited using the indoleamine 2,3-dioxygenase (IDO) inhibitor epacadostat. The levels of enzymes that feed the serotonin and indoleacetate pathways of tryptophan metabolism, including DOPA decarboxylase (DDC), monoamine oxidase A (MAOA) or MAOB and aldehyde dehydrogenase 2 (ALDH2), are decreased in ccRCC. *Upregulated in tumour endothelial cells. Wettersten, H. I. et al. (2017) Metabolic reprogramming in clear cell renal cell carcinoma Nat. Rev. Nephrol. doi: /nrneph
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