Cited by 36Nitric Oxide and Endothelin EffectsBiochemical and Molecular ResearchT-cell and B-cell Immunology

Role of increased guanosine triphosphate cyclohydrolase-1 expression and tetrahydrobiopterin levels upon T cell activation

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Chen, Wei, Li, Li, Brod, Torben, Saeed, Omar, Thabet, Salim, Jansen, Thomas, Dikalov, Sergey, Weyand, Cornelia +2 more·2011·Journal of Biological Chemistry

Abstract

Tetrahydrobiopterin (BH(4)) is an essential co-factor for the nitric-oxide (NO) synthases, and in its absence these enzymes produce superoxide (O(2)(·-)) rather than NO. The rate-limiting enzyme for BH(4) production is guanosine triphosphate cyclohydrolase-1 (GTPCH-1). Because endogenously produced NO affects T cell function, we sought to determine whether antigen stimulation affected T cell GTPCH-1 expression and ultimately BH(4) levels. Resting T cells had minimal expression of inducible NOS (NOS2), endothelial NOS (NOS3), and GTPCH-1 protein and nearly undetectable levels of BH(4). Anti-CD3 stimulation of T cells robustly stimulated the coordinated expression of NOS2, NOS3, and GTPCH-1 and markedly increased both GTPCH-1 activity and T cell BH(4) levels. The newly expressed GTPCH-1 was phosphorylated on serine 72 and pharmacological inhibition of casein kinase II reduced GTPCH-1 phosphorylation and blunted the increase in T cell BH(4). Inhibition of GTPCH-1 with diaminohydroxypyrimidine (1 mmol/liter) prevented T cell BH(4) accumulation, reduced NO production, and increased T cell O(2)(·-) production, due to both NOS2 and NOS3 uncoupling. GTPCH-1 inhibition also promoted TH(2) polarization in memory CD4 cells. Ovalbumin immunization of mice transgenic for an ovalbumin receptor (OT-II mice) confirmed a marked increase in T cell BH(4) in vivo. These studies identify a previously unidentified consequence of T cell activation, promoting BH(4) levels, NO production, and modulating T cell cytokine production.

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Authors
Chen, W., Li, L., Brod, T., Saeed, O., Thabet, S., Jansen, T., Dikalov, S., Weyand, C., Goronzy, J., & Harrison, D. G.
Affiliations
  • Emory University (US)
  • Stanford Medicine (US)
Corresponding author
Harrison, David G.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2011-04
Volume
286
Issue
16
Pages
13846-13851
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1989089149
Cited by
36
References
39
Citations by year
2025: 2 · 2024: 3 · 2023: 7 · 2022: 2 · 2020: 2 · 2019: 3 · 2018: 3 · 2017: 2 · 2016: 3 · 2015: 2 · 2014: 2 · 2012: 2
FWCI
1.53
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Heart, Lung, and Blood Institute (P01HL058000, R01HL117913)
  • National Institute of Allergy and Infectious Diseases (R01AI044142, R01AI108906, R56AI044142)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR042527)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Molecular Research
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
tetrahydrobiopterin, T cell activation, nitric oxide synthase, nitric oxide, superoxide, casein kinase 2, Th2 polarization, memory CD4+ T cells, anti-CD3 stimulation, ovalbumin immunization
MeSH terms
Animals, Biopterins, GTP Cyclohydrolase, Humans, Immunologic Memory, Mice, Inbred C57BL, Mice, Transgenic, Ovalbumin, Oxygen, Phosphorylation, T-Lymphocytes, Gene Expression Regulation, Enzymologic, Cytokines, CD3 Complex, Mice

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