Cited by 339T-cell and B-cell ImmunologySphingolipid Metabolism and SignalingPsoriasis: Treatment and Pathogenesis

The receptor S1P1 overrides regulatory T cell-mediated immune suppression through Akt-mTOR

Open access
Liu, Guangwei, Burns, Samir, Huang, Gonghua, Boyd, Kelli, Proia, Richard L, Flavell, Richard A, Chi, Hongbo·2009·Nature Immunology

Abstract

Regulatory T cells (T(reg) cells) are critically involved in maintaining immunological tolerance, but this potent suppression must be 'quenched' to allow the generation of adaptive immune responses. Here we report that sphingosine 1-phosphate (S1P) receptor type 1 (S1P1) delivers an intrinsic negative signal to restrain the thymic generation, peripheral maintenance and suppressive activity of T(reg) cells. Combining loss- and gain-of-function genetic approaches, we found that S1P1 blocked the differentiation of thymic T(reg) precursors and function of mature T(reg) cells and affected T(reg) cell-mediated immune tolerance. S1P1 induced selective activation of the Akt-mTOR kinase pathway to impede the development and function of T(reg) cells. Dynamic regulation of S1P1 contributed to lymphocyte priming and immune homeostasis. Thus, by antagonizing T(reg) cell-mediated immune suppression, the lipid-activated S1P1-Akt-mTOR pathway orchestrates adaptive immune responses.

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.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1038/ni.1743

Cites

50 of 50 references verified0 citation errors · 0 not checkable

Statistics

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.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The TTC3 gene is involved in the regulation of AKT signaling and is related with immune tolerance and neuronal cell survival.

    “Furthermore, the TTC3 gene is also involved in the regulation of AKT signaling and is related with immune tolerance and neuronal cell survival (Chen et al., 2003; Liu et al., 2009; Pulst, 2016).”

    From Identification of Candidate Signature Genes and Key Regulators Associated With Trypanotolerance in the Sheko Breed (2019) · cites this paper as Liu et al., 2009

    The Introduction links regulatory T cells to immune tolerance, and the Results section “S1P1 signals through Akt-mTOR to affect Treg cells” links Akt signaling to their suppressive function (page numbers unavailable). The paper attributes that signaling effect to S1P1, not TTC3; it does not address TTC3 or neuronal cell survival. (LLM, conf=0.85)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Liu, G., Burns, S., Huang, G., Boyd, K., Proia, R. L., Flavell, R. A., & Chi, H.
Affiliations
  • St. Jude Children's Research Hospital (US)
  • National Institutes of Health (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Chi, Hongbo
Venue
Nature Immunology
Published
2009-05-31
Volume
10
Issue
7
Pages
769-777
ISSN
  • 1529-2908 (ISSN-L)
  • 1529-2916
OpenAlex
W1989291933
Cited by
339
References
50
Citations by year
2026: 6 · 2025: 6 · 2024: 15 · 2023: 13 · 2022: 15 · 2021: 21 · 2020: 15 · 2019: 18 · 2018: 11 · 2017: 25 · 2016: 23 · 2015: 26 · 2014: 28 · 2013: 22 · 2012: 34
FWCI
13.37
Type
journal article
Language
en
Open access
Locations
  • Nature Immunology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (R01NS064599)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (K01AR053573)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sphingolipid Metabolism and Signaling
  • Life Sciences › Immunology and Microbiology › Immunology › Psoriasis: Treatment and Pathogenesis
Keywords
S1P1 receptor, sphingosine-1-phosphate, regulatory T cells, Akt/mTOR signaling, immune tolerance, immunosuppression, peripheral tolerance, lymphocyte priming, immune homeostasis, lipid signaling
MeSH terms
Animals, Animals, Newborn, Carrier Proteins, Cell Differentiation, Colon, Female, Flow Cytometry, Homeostasis, Immune Tolerance, Male, Mice, Inbred C57BL, Mice, Transgenic, Thymus Gland, Signal Transduction, CD4-Positive T-Lymphocytes, Leukocyte Common Antigens, Phosphotransferases (Alcohol Group Acceptor), Mice, Knockout, Adoptive Transfer, Receptors, Lysosphingolipid, T-Lymphocytes, Regulatory, Proto-Oncogene Proteins c-akt, Mice, Forkhead Transcription Factors, Interleukin-2 Receptor alpha Subunit, TOR Serine-Threonine Kinases

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