The DOI matches its Crossref record; 185 of the 185 references it cites were found in a registry or an index.
Kynurenine Pathway Metabolites in Humans: Disease and Healthy States
Open accessAbstract
Tryptophan is an essential amino acid that can be metabolised through different pathways, a major route being the kynurenine pathway. The first enzyme of the pathway, indoleamine-2,3-dioxygenase, is strongly stimulated by inflammatory molecules, particularly interferon gamma. Thus, the kynurenine pathway is often systematically up-regulated when the immune response is activated. The biological significance is that 1) the depletion of tryptophan and generation of kynurenines play a key modulatory role in the immune response; and 2) some of the kynurenines, such as quinolinic acid, 3-hydroxykynurenine and kynurenic acid, are neuroactive. The kynurenine pathway has been demonstrated to be involved in many diseases and disorders, including Alzheimer's disease, amyotrophic lateral sclerosis, Huntington's disease, AIDS dementia complex, malaria, cancer, depression and schizophrenia, where imbalances in tryptophan and kynurenines have been found. This review compiles most of these studies and provides an overview of how the kynurenine pathway might be contributing to disease development, and the concentrations of tryptophan and kynurenines in the serum, cerebrospinal fluid and brain tissues in control and patient subjects.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Cocchi, F., DeVico, A. L., Garzino-Demo, A., Arya, S. K., Gallo, R. C., & Lusso, P. (1995) · Science · doi:10.1126/science.270.5243.1811 · Cited by 2,869
CC CKR5: A RANTES, MIP-1α, MIP-1β Receptor as a Fusion Cofactor for Macrophage-Tropic HIV-1
Alkhatib, G., Combadiere, C., Broder, C. C., Feng, Y., Kennedy, P. E., Murphy, P. M., & Berger, E. A. (1996) · Science · doi:10.1126/science.272.5270.1955 · Cited by 2,706
Prevention of Allogeneic Fetal Rejection by Tryptophan Catabolism
Munn, D. H., Zhou, M., Attwood, J. T., Bondarev, I., Conway, S. J., Marshall, B., Brown, C., & Mellor, A. L. (1998) · Science · doi:10.1126/science.281.5380.1191 · Cited by 2,585
Grace, A. A. (1991) · Neuroscience · doi:10.1016/0306-4522(91)90196-u · Cited by 1,831
Inhibition of T Cell Proliferation by Macrophage Tryptophan Catabolism
Munn, D. H., Shafizadeh, E., Attwood, J. T., Bondarev, I., Pashine, A., & Mellor, A. L. (1999) · The Journal of Experimental Medicine · doi:10.1084/jem.189.9.1363 · Cited by 1,623
Role of nitric oxide synthesis in macrophage antimicrobial activity
Nathan, C. F., & Hibbs, J. B. (1991) · Current Opinion in Immunology · doi:10.1016/0952-7915(91)90079-g · Cited by 1,523
Munn, D. H., Sharma, M. D., Baban, B., Harding, H. P., Zhang, Y., Ron, D., & Mellor, A. L. (2005) · Immunity · doi:10.1016/j.immuni.2005.03.013 · Cited by 1,272
Quinolinic Acid: An Endogenous Metabolite That Produces Axon-Sparing Lesions in Rat Brain
Schwarcz, R., Whetsell, W. O., & Mangano, R. M. (1983) · Science · doi:10.1126/science.6849138 · Cited by 1,263
Coupling endoplasmic reticulum stress to the cell death program
Rao, R. V., Ellerby, H. M., & Bredesen, D. E. (2004) · Cell Death & Differentiation · doi:10.1038/sj.cdd.4401378 · Cited by 1,209
UNRAVELING THE MECHANISMS INVOLVED IN MOTOR NEURON DEGENERATION IN ALS
Bruijn, L. I., Miller, T. M., & Cleveland, D. W. (2004) · Annual Review of Neuroscience · doi:10.1146/annurev.neuro.27.070203.144244 · Cited by 1,185
Cited by
Kynurenines in the mammalian brain: when physiology meets pathology
Schwarcz, R., Bruno, J. P., Muchowski, P. J., & Wu, H.-Q. (2012) · Nature Reviews Neuroscience · doi:10.1038/nrn3257 · Cited by 1,530
Kynurenines: Tryptophan’s metabolites in exercise, inflammation, and mental health
Cervenka, I., Agudelo, L. Z., & Ruas, J. L. (2017) · Science · doi:10.1126/science.aaf9794 · Cited by 1,382
Kynurenine pathway of tryptophan metabolism: regulatory and functional aspects
Badawy, A. A.-B. (2017) · International Journal of Tryptophan Research · doi:10.1177/1178646917691938 · Cited by 1,158
Indoleamine 2,3 dioxygenase and metabolic control of immune responses
Munn, D. H., & Mellor, A. L. (2013) · Trends in Immunology · doi:10.1016/j.it.2012.10.001 · Cited by 1,037
Quinolinic acid, the inescapable neurotoxin
Guillemin, G. J. (2012) · The FEBS Journal · doi:10.1111/j.1742-4658.2012.08485.x · Cited by 595
Self-citation
Metadata
- Authors
- Chen, Y., & Guillemin, G. J.
- Venue
- International Journal of Tryptophan Research
- Publisher
- SAGE Publications
- Published
- 2009-01
- Volume
- 2
- Pages
- 1-19
- ISSN
- 1178-6469 (ISSN-L)
- OpenAlex
- W1571431689
- Cited by
- 628
- References
- 185
- FWCI
- 3.78
- Type
- journal article
- Language
- en
- Open access
- gold
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Kynurenine Pathway Metabolites in Humans: Disease and Healthy States. https://app.cochat.ai/papers/10.4137/ijtr.s2097
- The paper
- Chen, Y., & Guillemin, G. J. (2009). Kynurenine Pathway Metabolites in Humans: Disease and Healthy States. International Journal of Tryptophan Research. https://doi.org/10.4137/ijtr.s2097
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.