Evidence map›Paper›PMID 34145969›Full record

ReviewThe FEBS journal2022

Indoleamine 2,3-dioxygenase 1 (IDO1): an up-to-date overview of an eclectic immunoregulatory enzyme.

Maria Teresa Pallotta, Sofia Rossini, Chiara Suvieri, Alice Coletti, Ciriana Orabona, Antonio Macchiarulo, Claudia Volpi, Ursula Grohmann

Open access · greenAbstract readReview
In one paragraph

Review in The FEBS journal, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 157 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
157citing papers in PubMed, 2 pooled it
7.7field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

157 citing papers in PubMed, 2 syntheses or guidelines pooled it, 201 citations in OpenAlex.

  1. Efficacy and safety of immunotherapy monotherapy versus combination regimens in recurrent/metastatic head and neck squamous cell carcinoma: A systematic review and meta-analysis.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2026
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  6. Therapeutic remodeling of the tuberculosis granuloma with 1-methyl-D-tryptophan enhances CD8Proceedings of the National Academy of Sciences of the United States of America · 2026
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97 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 1 institution in 1 country.

Maria Teresa PallottaDepartment of Medicine and Surgery, University of Perugia, Italy.
Sofia RossiniDepartment of Medicine and Surgery, University of Perugia, Italy.
Chiara SuvieriDepartment of Medicine and Surgery, University of Perugia, Italy.
Alice ColettiDepartment of Pharmaceutical Sciences, University of Perugia, Italy.
Ciriana OrabonaDepartment of Medicine and Surgery, University of Perugia, Italy.
Antonio MacchiaruloDepartment of Pharmaceutical Sciences, University of Perugia, Italy.
Claudia VolpiDepartment of Medicine and Surgery, University of Perugia, Italy.
Ursula GrohmannDepartment of Medicine and Surgery, University of Perugia, Italy.ORCID 0000-0001-7952-1850
University of Perugia · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Indoleamine 2,3-dioxygenase 1 (IDO1) catalyzes the initial rate-limiting step in the degradation of the essential amino acid tryptophan along the kynurenine pathway. When discovered more than 50 years ago, IDO1 was thought to be an effector molecule capable of mediating a survival strategy based on the deprivation of bacteria and tumor cells of the essential amino acid tryptophan. Since 1998, when tryptophan catabolism was discovered to be crucially involved in the maintenance of maternal T-cell tolerance, IDO1 has become the focus of several laboratories around the world. Indeed, IDO1 is now considered as an authentic immune regulator not only in pregnancy, but also in autoimmune diseases, chronic inflammation, and tumor immunity. However, in the last years, a bulk of new information-including structural, biological, and functional evidence-on IDO1 has come to light. For instance, we now know that IDO1 has a peculiar conformational plasticity and, in addition to a complex and highly regulated catalytic activity, is capable of performing a nonenzymic function that reprograms the expression profile of immune cells toward a highly immunoregulatory phenotype. With this state-of-the-art review, we aimed at gathering the most recent information obtained for this eclectic protein as well as at highlighting the major unresolved questions.

Indexed as

Indoleamine-Pyrrole 2,3,-DioxygenaseKynurenineImmune ToleranceImmunityTryptophanIndoleamine-Pyrrole 2,3,-DioxygenaseKynurenineTryptophandendritic cellsearly endosomesindoleamine 2,3-dioxygenase 1moonlighting proteinphosphatidylinositol 3-kinaseSrc kinasetryptophan metabolism

Identifiers

PMID34145969
PMCPMC9786828
OpenAlexW3169986140

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.