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Takizawa F, Hashimoto K, Miyazawa R, Ohta Y, Veríssimo A, Flajnik MF, Parra D, Tokunaga K, Suetake H, Sunyer JO, Dijkstra JM. CD4 and LAG-3 from sharks to humans: related molecules with motifs for opposing functions. Front Immunol 2023; 14:1267743. [PMID: 38187381 PMCID: PMC10768021 DOI: 10.3389/fimmu.2023.1267743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/27/2023] [Indexed: 01/09/2024] Open
Abstract
CD4 and LAG-3 are related molecules that are receptors for MHC class II molecules. Their major functional differences are situated in their cytoplasmic tails, in which CD4 has an activation motif and LAG-3 an inhibitory motif. Here, we identify shark LAG-3 and show that a previously identified shark CD4-like gene has a genomic location, expression pattern, and motifs similar to CD4 in other vertebrates. In nurse shark (Ginglymostoma cirratum) and cloudy catshark (Scyliorhinus torazame), the highest CD4 expression was consistently found in the thymus whereas such was not the case for LAG-3. Throughout jawed vertebrates, the CD4 cytoplasmic tail possesses a Cx(C/H) motif for binding kinase LCK, and the LAG-3 cytoplasmic tail possesses (F/Y)xxL(D/E) including the previously determined FxxL inhibitory motif resembling an immunoreceptor tyrosine-based inhibition motif (ITIM). On the other hand, the acidic end of the mammalian LAG-3 cytoplasmic tail, which is believed to have an inhibitory function as well, was acquired later in evolution. The present study also identified CD4-1, CD4-2, and LAG-3 in the primitive ray-finned fishes bichirs, sturgeons, and gars, and experimentally determined these sequences for sterlet sturgeon (Acipenser ruthenus). Therefore, with CD4-1 and CD4-2 already known in teleosts (modern ray-finned fish), these two CD4 lineages have now been found within all major clades of ray-finned fish. Although different from each other, the cytoplasmic tails of ray-finned fish CD4-1 and chondrichthyan CD4 not only contain the Cx(C/H) motif but also an additional highly conserved motif which we expect to confer a function. Thus, although restricted to some species and gene copies, in evolution both CD4 and LAG-3 molecules appear to have acquired functional motifs besides their canonical Cx(C/H) and ITIM-like motifs, respectively. The presence of CD4 and LAG-3 molecules with seemingly opposing functions from the level of sharks, the oldest living vertebrates with a human-like adaptive immune system, underlines their importance for the jawed vertebrate immune system. It also emphasizes the general need of the immune system to always find a balance, leading to trade-offs, between activating and inhibiting processes.
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Affiliation(s)
- Fumio Takizawa
- Faculty of Marine Science and Technology, Fukui Prefectural University, Obama, Fukui, Japan
| | - Keiichiro Hashimoto
- Emeritus Professor, Center for Medical Science, Fujita Health University, Toyoake, Aichi, Japan
| | - Ryuichiro Miyazawa
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Yuko Ohta
- Department of Microbiology and Immunology, University of Maryland, Baltimore, MD, United States
| | - Ana Veríssimo
- CIBIO‐InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, Vairão, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, Portugal
| | - Martin F. Flajnik
- Department of Microbiology and Immunology, University of Maryland, Baltimore, MD, United States
| | | | | | - Hiroaki Suetake
- Faculty of Marine Science and Technology, Fukui Prefectural University, Obama, Fukui, Japan
| | - J. Oriol Sunyer
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, United States
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2
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Liu C, Zhou J, Kudlacek S, Qi T, Dunlap T, Cao Y. Population dynamics of immunological synapse formation induced by bispecific T cell engagers predict clinical pharmacodynamics and treatment resistance. eLife 2023; 12:e83659. [PMID: 37490053 PMCID: PMC10368424 DOI: 10.7554/elife.83659] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 06/01/2023] [Indexed: 07/26/2023] Open
Abstract
Effector T cells need to form immunological synapses (IS) with recognized target cells to elicit cytolytic effects. Facilitating IS formation is the principal pharmacological action of most T cell-based cancer immunotherapies. However, the dynamics of IS formation at the cell population level, the primary driver of the pharmacodynamics of many cancer immunotherapies, remains poorly defined. Using classic immunotherapy CD3/CD19 bispecific T cell engager (BiTE) as our model system, we integrate experimental and theoretical approaches to investigate the population dynamics of IS formation and their relevance to clinical pharmacodynamics and treatment resistance. Our models produce experimentally consistent predictions when defining IS formation as a series of spatiotemporally coordinated events driven by molecular and cellular interactions. The models predict tumor-killing pharmacodynamics in patients and reveal trajectories of tumor evolution across anatomical sites under BiTE immunotherapy. Our models highlight the bone marrow as a potential sanctuary site permitting tumor evolution and antigen escape. The models also suggest that optimal dosing regimens are a function of tumor growth, CD19 expression, and patient T cell abundance, which confer adequate tumor control with reduced disease evolution. This work has implications for developing more effective T cell-based cancer immunotherapies.
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Affiliation(s)
- Can Liu
- Division of Pharmacotherapy and Experimental Therapeutics, School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, United States
| | - Jiawei Zhou
- Division of Pharmacotherapy and Experimental Therapeutics, School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, United States
| | - Stephan Kudlacek
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, United States
| | - Timothy Qi
- Division of Pharmacotherapy and Experimental Therapeutics, School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, United States
| | - Tyler Dunlap
- Division of Pharmacotherapy and Experimental Therapeutics, School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, United States
| | - Yanguang Cao
- Division of Pharmacotherapy and Experimental Therapeutics, School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, United States
- Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, United States
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3
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Johnson DK, Magoffin W, Myers SJ, Finnell JG, Hancock JC, Orton TS, Persaud SP, Christensen KA, Weber KS. CD4 Inhibits Helper T Cell Activation at Lower Affinity Threshold for Full-Length T Cell Receptors Than Single Chain Signaling Constructs. Front Immunol 2021; 11:561889. [PMID: 33542711 PMCID: PMC7851051 DOI: 10.3389/fimmu.2020.561889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 11/30/2020] [Indexed: 11/13/2022] Open
Abstract
CD4+ T cells are crucial for effective repression and elimination of cancer cells. Despite a paucity of CD4+ T cell receptor (TCR) clinical studies, CD4+ T cells are primed to become important therapeutics as they help circumvent tumor antigen escape and guide multifactorial immune responses. However, because CD8+ T cells directly kill tumor cells, most research has focused on the attributes of CD8+ TCRs. Less is known about how TCR affinity and CD4 expression affect CD4+ T cell activation in full length TCR (flTCR) and TCR single chain signaling (TCR-SCS) formats. Here, we generated an affinity panel of TCRs from CD4+ T cells and expressed them in flTCR and three TCR-SCS formats modeled after chimeric antigen receptors (CARs) to understand the contributions of TCR-pMHCII affinity, TCR format, and coreceptor CD4 interactions on CD4+ T cell activation. Strikingly, the coreceptor CD4 inhibited intermediate and high affinity TCR-construct activation by Lck-dependent and -independent mechanisms. These inhibition mechanisms had unique affinity thresholds dependent on the TCR format. Intracellular construct formats affected the tetramer staining for each TCR as well as IL-2 production. IL-2 production was promoted by increased TCR-pMHCII affinity and the flTCR format. Thus, CD4+ T cell therapy development should consider TCR affinity, CD4 expression, and construct format.
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Affiliation(s)
- Deborah K Johnson
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
| | - Wyatt Magoffin
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
| | - Sheldon J Myers
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
| | - Jordan G Finnell
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, United States
| | - John C Hancock
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
| | - Taylor S Orton
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
| | - Stephen P Persaud
- Division of Laboratory and Genomic Medicine, Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO, United States
| | - Kenneth A Christensen
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, United States
| | - K Scott Weber
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, United States
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4
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Apte SH, Minigo G, Groves PL, Spargo JC, Plebanski M, Grigg MJ, Kenangalem E, Burel JG, Loughland JR, Flanagan KL, Piera KA, William T, Price RN, Woodberry T, Barber BE, Anstey NM, Doolan DL. A population of CD4 hiCD38 hi T cells correlates with disease severity in patients with acute malaria. Clin Transl Immunology 2020; 9:e1209. [PMID: 33282291 PMCID: PMC7684974 DOI: 10.1002/cti2.1209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/08/2020] [Accepted: 10/20/2020] [Indexed: 01/12/2023] Open
Abstract
OBJECTIVE CD4+ T cells are critical mediators of immunity to Plasmodium spp. infection, but their characteristics during malarial episodes and immunopathology in naturally infected adults are poorly defined. Flow cytometric analysis of PBMCs from patients with either P. falciparum or P. knowlesi malaria revealed a pronounced population of CD4+ T cells co-expressing very high levels of CD4 and CD38 we have termed CD4hiCD38hi T cells. We set out to gain insight into the function of these novel cells. METHODS CD4+ T cells from 18 patients with P. falciparum or P. knowlesi malaria were assessed by flow cytometry and sorted into populations of CD4hiCD38hi or CD4norm T cells. Gene expression in the sorted populations was assessed by qPCR and NanoString. RESULTS CD4hiCD38hi T cells expressed high levels of CD4 mRNA and canonical type 1 regulatory T-cell (TR1) genes including IL10, IFNG, LAG3 and HAVCR2 (TIM3), and other genes with relevance to cell migration and immunomodulation. These cells increased in proportion to malaria disease severity and were absent after parasite clearance with antimalarials. CONCLUSION In naturally infected adults with acute malaria, a prominent population of type 1 regulatory T cells arises that can be defined by high co-expression of CD4 and CD38 (CD4hiCD38hi) and that correlates with disease severity in patients with falciparum malaria. This study provides fundamental insights into T-cell biology, including the first evidence that CD4 expression is modulated at the mRNA level. These findings have important implications for understanding the balance between immunity and immunopathology during malaria.
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Affiliation(s)
- Simon H Apte
- Infectious Diseases ProgramQIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia,Present address:
Queensland Lung Transplant Service, The Prince Charles HospitalChermsideQLDAustralia
| | - Gabriela Minigo
- Global and Tropical Health DivisionMenzies School of Health ResearchCasuarinaNTAustralia,Charles Darwin UniversityDarwinNTAustralia
| | - Penny L Groves
- Infectious Diseases ProgramQIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia
| | - Jessie C Spargo
- Global and Tropical Health DivisionMenzies School of Health ResearchCasuarinaNTAustralia,Charles Darwin UniversityDarwinNTAustralia
| | - Magdalena Plebanski
- Department of Immunology and PathologyMonash UniversityPrahranVICAustralia,School of Health and Biomedical SciencesRMIT UniversityBundooraVICAustralia
| | - Mathew J Grigg
- Global and Tropical Health DivisionMenzies School of Health ResearchCasuarinaNTAustralia,Charles Darwin UniversityDarwinNTAustralia
| | - Enny Kenangalem
- Papuan Health and Community Development FoundationTimikaIndonesia
| | - Julie G Burel
- Infectious Diseases ProgramQIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia,Present address:
La Jolla Institute for ImmunologyLa JollaCAUSA
| | - Jessica R Loughland
- Infectious Diseases ProgramQIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia,Global and Tropical Health DivisionMenzies School of Health ResearchCasuarinaNTAustralia,Charles Darwin UniversityDarwinNTAustralia
| | - Katie L Flanagan
- Department of Immunology and PathologyMonash UniversityPrahranVICAustralia,School of Health and Biomedical SciencesRMIT UniversityBundooraVICAustralia,School of MedicineUniversity of TasmaniaLauncestonTASAustralia
| | - Kim A Piera
- Global and Tropical Health DivisionMenzies School of Health ResearchCasuarinaNTAustralia,Charles Darwin UniversityDarwinNTAustralia
| | - Timothy William
- School of MedicineUniversity of TasmaniaLauncestonTASAustralia
| | - Ric N Price
- Global and Tropical Health DivisionMenzies School of Health ResearchCasuarinaNTAustralia,Nuffield Department of Clinical MedicineCentre for Tropical Medicine and Global HealthUniversity of OxfordOxfordUK,Mahidol‐Oxford Tropical Medicine Research UnitFaculty of Tropical MedicineMahidol UniversityBangkokThailand
| | - Tonia Woodberry
- Global and Tropical Health DivisionMenzies School of Health ResearchCasuarinaNTAustralia,Charles Darwin UniversityDarwinNTAustralia
| | - Bridget E Barber
- Infectious Diseases ProgramQIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia,Global and Tropical Health DivisionMenzies School of Health ResearchCasuarinaNTAustralia,Charles Darwin UniversityDarwinNTAustralia
| | - Nicholas M Anstey
- Global and Tropical Health DivisionMenzies School of Health ResearchCasuarinaNTAustralia
| | - Denise L Doolan
- Infectious Diseases ProgramQIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia,Centre for Molecular TherapeuticsAustralian Institute of Tropical Health & MedicineJames Cook UniversityCairnsQLDAustralia
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5
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Bene L, Bagdány M, Damjanovich L. Adaptive threshold-stochastic resonance (AT-SR) in MHC clusters on the cell surface. Immunol Lett 2019; 217:65-71. [PMID: 31738956 DOI: 10.1016/j.imlet.2019.11.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 10/15/2019] [Accepted: 11/11/2019] [Indexed: 11/15/2022]
Abstract
Highly conserved 2D receptor clusters (membrane rafts) of immunological signaling molecules with MHCI and MHCII antigens as their cores have been observed in the past on the surface of T- and B-cell lines of lymphoid origin, as well as on cells from patients with colon tumor and Crohn's disease. Conservativity is related to the ever presence of MHCI molecules. Although they are suspected to play a role in maintaining these clusters and facilitating transmembrane signaling, their exact role has been left largely enigmatic. Here we are suggesting stochastic resonance (SR), or "noise-assisted signal detection", as a general organizing principle for transmembrane signaling events evoked by processes like immune recognition and cytokine binding taking place in these clusters. In the conceptual framework of SR, in immune recognition as a prototype of transmembrane signaling, the sea of self-peptide-MHC complexes around a nonself-peptide presenting MHC is conceived as a source of quickly fluctuating unspecific signal ("athermal noise") serving the extra energy for amplifying the weak sub-threshold specific signal of the nonself-peptide presenting MHC. This same noise is also utilized for a readjustment of the threshold - and also the sensitivity and specificity - of detection by a closed loop feedback control of the TcR-CD8 (CD4) proximity on the detecting T-cell. The weak sub threshold specific signal of nonself-peptide presenting MHC is amplified by the superposing unspecific signals of the neighboring self peptide-MHC complexes towards the T-cell receptor as the detector. Because in a successful detection event both self- and nonself-peptides are detected simultaneously, the principle of coincidence (or lock-in) detection is also realized. The ever presence of MHC islands gets a natural explanation as a source of extra power - in a form of "athermal noise" - needed for coincidence detection and frequency encoding the evoked downstream signals. The effect is quite general, because the actual type of molecules surrounding a chief signaling molecule - like nonself-peptide holding MHC, interleukin-2 and -15 cytokine receptors (IL-2R/15R) - as the fluctuating interaction energy sources is immaterial. The model applies also for other types of signaling, such as those evoked by cytokine binding. The phenomenon of SR can also be interpreted as sampling of a low frequency, specific signal with a high frequency unspecific signal, the "noise". Recipes for identifying other forms of SR in membrane clusters with biophysical tools are recommended.
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Affiliation(s)
- László Bene
- Department of Surgery, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
| | - Miklós Bagdány
- Department of Physiology, McGill University, Montreal, Canada
| | - László Damjanovich
- Department of Surgery, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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6
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Omer B, Castillo PA, Tashiro H, Shum T, Huynh MTA, Cardenas M, Tanaka M, Lewis A, Sauer T, Parihar R, Lapteva N, Schmueck-Henneresse M, Mukherjee M, Gottschalk S, Rooney CM. Chimeric Antigen Receptor Signaling Domains Differentially Regulate Proliferation and Native T Cell Receptor Function in Virus-Specific T Cells. Front Med (Lausanne) 2018; 5:343. [PMID: 30619856 PMCID: PMC6297364 DOI: 10.3389/fmed.2018.00343] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 11/22/2018] [Indexed: 11/16/2022] Open
Abstract
The efficacy of T cells expressing chimeric antigen receptors (CARs) for solid tumors has been limited by insufficient CAR T cell expansion and persistence. The use of virus-specific T cells (VSTs) as carriers for CARs may overcome this limitation since CAR-VSTs can be boosted by viral vaccines or oncolytic viruses. However, there is limited understanding of the optimal combination of endodomains and their influence on the native T cell receptor (TCR) in VSTs. We therefore compared the function of GD2.CARs expressing the TCR zeta chain (ζ) alone or combined with endodomains from CD28 and 4-1BB in varicella zoster virus-specific (VZV) T cells. VZVSTs expressing GD2-CARs recognized VZV-derived peptides and killed GD2-expressing tumor cells. However, after repeated stimulation through their native TCR, the expansion of GD2-CAR.CD28ζ-VZVSTs was 3.3-fold greater (p < 0.001) than non-transduced VZVSTs, whereas GD2-CARζ- and GD2-CAR.41BBζ inhibited VZVST expansion (p < 0.01). Compared to control VZVSTs, GD2-CAR.ζ VZVSTs showed a greater frequency of apoptotic (p < 0.01) T cells, whereas prolonged downregulation of the native αβ TCR was observed in GD2-CAR.41BBζ VZVSTs (p < 0.001). We confirmed that CD28ζ can best maintain TCR function by expressing GD2.CARs in Epstein-Barr virus-specific T cells and CD19-CARs in VZVSTs. In response to CAR stimulation VSTs with CD28ζ endodomains also showed the greatest expansion (6 fold > GD2-CAR.41BBζ VZVSTs (p < 0.001), however anti-tumor efficacy was superior in GD2-CAR.41BBζ-VZVSTs. These findings demonstrate that CAR signaling domains can enhance or diminish the function of the native TCR and indicate that only CD28ζ may preserve the function of the native TCR in tonically signaling CAR-VSTs.
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Affiliation(s)
- Bilal Omer
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States.,Department of Pediatrics, Baylor College of Medicine, Houston, TX, United States
| | - Paul A Castillo
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Haruko Tashiro
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Thomas Shum
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Mai T A Huynh
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Mara Cardenas
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Miyuki Tanaka
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Andrew Lewis
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Tim Sauer
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Robin Parihar
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States.,Department of Pediatrics, Baylor College of Medicine, Houston, TX, United States
| | - Natalia Lapteva
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Michael Schmueck-Henneresse
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Malini Mukherjee
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States
| | - Stephen Gottschalk
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States.,Department of Pediatrics, Baylor College of Medicine, Houston, TX, United States.,Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, United States
| | - Cliona M Rooney
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital, Texas Children's Hospital, Houston, TX, United States.,Department of Pediatrics, Baylor College of Medicine, Houston, TX, United States.,Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, United States.,Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States
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7
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Greenplate AR, McClanahan DD, Oberholtzer BK, Doxie DB, Roe CE, Diggins KE, Leelatian N, Rasmussen ML, Kelley MC, Gama V, Siska PJ, Rathmell JC, Ferrell PB, Johnson DB, Irish JM. Computational Immune Monitoring Reveals Abnormal Double-Negative T Cells Present across Human Tumor Types. Cancer Immunol Res 2018; 7:86-99. [PMID: 30413431 DOI: 10.1158/2326-6066.cir-17-0692] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 07/17/2018] [Accepted: 11/05/2018] [Indexed: 12/22/2022]
Abstract
Advances in single-cell biology have enabled measurements of >40 protein features on millions of immune cells within clinical samples. However, the data analysis steps following cell population identification are susceptible to bias, time-consuming, and challenging to compare across studies. Here, an ensemble of unsupervised tools was developed to evaluate four essential types of immune cell information, incorporate changes over time, and address diverse immune monitoring challenges. The four complementary properties characterized were (i) systemic plasticity, (ii) change in population abundance, (iii) change in signature population features, and (iv) novelty of cellular phenotype. Three systems immune monitoring studies were selected to challenge this ensemble approach. In serial biopsies of melanoma tumors undergoing targeted therapy, the ensemble approach revealed enrichment of double-negative (DN) T cells. Melanoma tumor-resident DN T cells were abnormal and phenotypically distinct from those found in nonmalignant lymphoid tissues, but similar to those found in glioblastoma and renal cell carcinoma. Overall, ensemble systems immune monitoring provided a robust, quantitative view of changes in both the system and cell subsets, allowed for transparent review by human experts, and revealed abnormal immune cells present across multiple human tumor types.
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Affiliation(s)
- Allison R Greenplate
- Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Daniel D McClanahan
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Brian K Oberholtzer
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Deon B Doxie
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Caroline E Roe
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Kirsten E Diggins
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Nalin Leelatian
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Megan L Rasmussen
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Mark C Kelley
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Vivian Gama
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee.,Vanderbilt Center for Stem Cell Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Peter J Siska
- Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Jeffrey C Rathmell
- Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt Center for Immunobiology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - P Brent Ferrell
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Douglas B Johnson
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jonathan M Irish
- Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee. .,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee.,Vanderbilt Center for Immunobiology, Vanderbilt University School of Medicine, Nashville, Tennessee
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8
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Martina MN, Noel S, Saxena A, Bandapalle S, Majithia R, Jie C, Arend LJ, Allaf ME, Rabb H, Hamad ARA. Double-Negative αβ T Cells Are Early Responders to AKI and Are Found in Human Kidney. J Am Soc Nephrol 2015; 27:1113-23. [PMID: 26315532 DOI: 10.1681/asn.2014121214] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 07/15/2015] [Indexed: 11/03/2022] Open
Abstract
Ischemia-reperfusion injury (IRI) is a major cause of AKI, and previous studies established important roles for conventional CD4(+) T cells, natural killer T cells, and CD4(+)CD25(+)FoxP3(+) Tregs in AKI pathogenesis. We recently identified CD4(-)CD8(-) (double-negative; DN) T cells as an important subset of αβ T cell receptor-positive cells residing in mouse kidney. However, little is known about the pathophysiologic functions of kidney DN T cells. In this study, we phenotypically and functionally characterized murine kidney DN T cells in the steady state and in response to IRI. Unlike CD4(+) and CD8(+) T cells, DN T cells in the steady state expressed high levels of CD69, CD28, and CD40L; differentially expressed IL-27 and IL-10 anti-inflammatory cytokines; spontaneously proliferated at a very high rate; and suppressed in vitro proliferation of activated CD4(+) T cells. Within the first 3-24 hours after IRI, kidney DN T cells expanded significantly and upregulated expression of IL-10. In adoptive transfer experiments, DN T cells significantly protected recipients from AKI by an IL-10-dependent mechanism. DN T cells also made up a large fraction of the T cell compartment in human kidneys. Our results indicate that DN T cells are an important subset of the resident αβ(+) T cell population in the mammalian kidney and are early responders to AKI that have anti-inflammatory properties.
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Affiliation(s)
| | | | | | | | | | - Chunfa Jie
- Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | | | - Mohamad E Allaf
- Department of Urology, Johns Hopkins University, Baltimore, Maryland, and
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9
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Devaud C, Westwood JA, Teng MW, John LB, Yong CS, Duong CP, Smyth MJ, Darcy PK, Kershaw MH. Differential potency of regulatory T cell-mediated immunosuppression in kidney tumors compared to subcutaneous tumors. Oncoimmunology 2014; 3:e963395. [PMID: 25941590 DOI: 10.4161/21624011.2014.963395] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Accepted: 09/04/2014] [Indexed: 12/25/2022] Open
Abstract
In many cancers, regulatory T cells (Treg) play a crucial role in suppressing the effector immune response thereby permitting tumor development. Indeed, in mouse models, their depletion can promote the regression of tumors of various origins, including renal cell carcinoma when located subcutaneous (SC). In the present study, we aimed to assess the importance of Treg immunosuppression in the physiologic context of metastatic renal carcinoma (Renca) disease. To that purpose we inoculated renal tumors orthotopically, intra-kidney (IK), in mice. Treg depletions were performed using anti-CD4 antibody in wild type mice or diphtheria toxin (DT) in Foxp3DTR transgenic mice. Our main observation was that Treg were not the key immunosuppressive component of the IK tumoral microenvironment, compared to the same tumors located SC. We demonstrated that the CD8+ effector immune response was still suppressed in IK tumors when compared to SC tumors, following Treg depletion. Furthermore, the level of program cell death protein (PD)-1 was increased on the surface of CD4+ T cells infiltrating IK tumors compared to SC tumors. Finally, the Treg-independent immunosuppression, occurring in IK tumors, was potent enough to inhibit regression of concomitant SC tumors, normally responsive to Treg depletion. Our findings provide further insight into the immunosuppressive nature of the immune response generated in the kidney microenvironment, suggesting that it can have additional mechanisms in addition to Treg. These observations might help to identify better targets from the kidney tumor microenvironment for future cancer therapies.
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Key Words
- CD, cluster of differentiation
- CTLA-4, cytotoxic T lymphocyte antigen 4
- DEREG, Depletion of Regulatory T cells
- DT, diphtheria toxin
- DTR, diphtheria toxin receptor
- FCS, fetal calf serum
- FR, folate receptor
- Foxp3, Forkhead box protein P3
- IFN, interferon
- IK, intra-kidney
- IL, interleukin
- IP, intra-peritoneal
- IV, intravenously
- M2, type-2 immunosuppressive macrophages
- PBS, phosphate-buffered saline
- PD-1, program cell death protein 1
- PD-L1, PD ligand 1
- Renca Ch+ L+, Renca Cherry Luciferase
- SC, subcutaneous
- T regulatory cells
- TCR, T cell receptor
- Th, T helper cells
- Treg, regulatory T cells
- depletion
- immunosuppression
- kidney tumors
- mAb, monoclonal antibody
- tumor microenvironment
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Affiliation(s)
- Christel Devaud
- Cancer Immunology Research Program; Sir Peter MacCallum Department of Oncology; University of Melbourne ; Parkville, Victoria, Australia
| | - Jennifer A Westwood
- Cancer Immunology Research Program; Sir Peter MacCallum Department of Oncology; University of Melbourne ; Parkville, Victoria, Australia
| | - Michele Wl Teng
- Cancer Immune Regulation and Immunotherapy Laboratory; QIMR Berghofer Medical Research Institute ; Brisbane, Queensland, Australia
| | - Liza B John
- Cancer Immunology Research Program; Sir Peter MacCallum Department of Oncology; University of Melbourne ; Parkville, Victoria, Australia
| | - Carmen Sm Yong
- Cancer Immunology Research Program; Sir Peter MacCallum Department of Oncology; University of Melbourne ; Parkville, Victoria, Australia
| | - Connie Pm Duong
- Cancer Immunology Research Program; Sir Peter MacCallum Department of Oncology; University of Melbourne ; Parkville, Victoria, Australia
| | - Mark J Smyth
- Immunology in Cancer and Infection Laboratory; QIMR Berghofer Medical Research Institute ; Brisbane, Queensland, Australia
| | - Phillip K Darcy
- Cancer Immunology Research Program; Sir Peter MacCallum Department of Oncology; University of Melbourne ; Parkville, Victoria, Australia ; Department of Immunology; Monash University ; Prahran, Victoria, Australia
| | - Michael H Kershaw
- Cancer Immunology Research Program; Sir Peter MacCallum Department of Oncology; University of Melbourne ; Parkville, Victoria, Australia ; Department of Immunology; Monash University ; Prahran, Victoria, Australia
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10
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Fischer U, Koppang EO, Nakanishi T. Teleost T and NK cell immunity. FISH & SHELLFISH IMMUNOLOGY 2013; 35:197-206. [PMID: 23664867 DOI: 10.1016/j.fsi.2013.04.018] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 02/01/2013] [Accepted: 04/12/2013] [Indexed: 06/02/2023]
Abstract
The main function of the immune system is to maintain the organism's homeostasis when invaded by foreign material or organisms. Prior to successful elimination of the invader it is crucial to distinguish self from non-self. Most pathogens and altered cells can be recognized by immune cells through expressed pathogen- or danger-associated molecular patterns (PAMPS or DAMPS, respectively), through non-self (e.g. allogenic or xenogenic cells) or missing major histocompatibility (MHC) class I molecules (some virus-infected target cells), and by presenting foreign non-self peptides of intracellular (through MHC class I-e.g. virus-infected target cells) or extracellular (through MHC class II-e.g. from bacteria) origin. In order to eliminate invaders directly or by destroying their ability to replicate (e.g. virus-infected cells) specialized immune cells of the innate and adaptive responses appeared during evolution. The first line of defence is represented by the evolutionarily ancient macrophages and natural killer (NK) cells. These innate mechanisms are well developed in bony fish. Two types of NK cell homologues have been described in fish: non-specific cytotoxic cells and NK-like cells. Adaptive cell-mediated cytotoxicity (CMC) requires key molecules expressed on cytotoxic T lymphocytes (CTLs) and target cells. CTLs kill host cells harbouring intracellular pathogens by binding of their T cell receptor (TCR) and its co-receptor CD8 to a complex of MHC class I and bound peptide on the infected host cell. Alternatively, extracellular antigens are taken up by professional antigen presenting cells such as macrophages, dendritic cells and B cells to process those antigens and present the resulting peptides in association with MHC class II to CD4(+) T helper cells. During recent years, genes encoding MHC class I and II, TCR and its co-receptors CD8 and CD4 have been cloned in several fish species and antibodies have been developed to study protein expression in morphological and functional contexts. Functional assays for innate and adaptive lymphocyte responses have been developed in only a few fish species. This review summarizes and discusses recent results and developments in the field of T and NK cell responses with focus on economically important and experimental model fish species in the context of vaccination.
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Affiliation(s)
- Uwe Fischer
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Infectology, Suedufer 10, 17493 Greifswald-Insel Riems, Germany.
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11
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Olver S, Apte SH, Baz A, Kelso A, Kienzle N. Interleukin-4-induced loss of CD8 expression and cytolytic function in effector CD8 T cells persists long term in vivo. Immunology 2013; 139:187-96. [PMID: 23311920 DOI: 10.1111/imm.12068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2012] [Revised: 01/07/2013] [Accepted: 01/08/2013] [Indexed: 01/28/2023] Open
Abstract
Activation of naive CD8(+) T cells in the presence of interleukin-4 modulates their CD8 co-receptor expression and functional differentiation, resulting in the generation of CD8(low) cells that produce type 2 cytokines and display poor cytolytic and anti-tumour activity. Although this CD8(low) phenotype becomes stable after about a week and can persist with further stimulation in vitro, it is not known whether it can be maintained long term in vivo. Here we report that CD8(low) cells derived from oval-bumin(257-264) -specific T-cell receptor-transgenic CD8(+) T cells activated in the presence of interleukin-4 could be detected in the spleen for at least 4 months after adoptive transfer into normal mice. A significant proportion of the long-term surviving cells retained their CD8(low) phenotype in vivo and after clonal re-activation in vitro. Although long-term surviving CD8(low) cells lacked detectable cytolytic activity or perforin expression, they showed some anti-tumour function in vivo. The persistence of functional cells with a CD8(low) phenotype in vivo raises the possibility that such cells can contribute to effector or regulatory responses to tumours or pathogens.
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Affiliation(s)
- Stuart Olver
- The Cooperative Research Centre for Vaccine Technology and the Queensland Institute of Medical Research, Herston, Qld, Australia
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12
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Hansen SG, Sacha JB, Hughes CM, Ford JC, Burwitz BJ, Scholz I, Gilbride RM, Lewis MS, Gilliam AN, Ventura AB, Malouli D, Xu G, Richards R, Whizin N, Reed JS, Hammond KB, Fischer M, Turner JM, Legasse AW, Axthelm MK, Edlefsen PT, Nelson JA, Lifson JD, Früh K, Picker LJ. Cytomegalovirus vectors violate CD8+ T cell epitope recognition paradigms. Science 2013; 340:1237874. [PMID: 23704576 PMCID: PMC3816976 DOI: 10.1126/science.1237874] [Citation(s) in RCA: 351] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
CD8(+) T cell responses focus on a small fraction of pathogen- or vaccine-encoded peptides, and for some pathogens, these restricted recognition hierarchies limit the effectiveness of antipathogen immunity. We found that simian immunodeficiency virus (SIV) protein-expressing rhesus cytomegalovirus (RhCMV) vectors elicit SIV-specific CD8(+) T cells that recognize unusual, diverse, and highly promiscuous epitopes, including dominant responses to epitopes restricted by class II major histocompatibility complex (MHC) molecules. Induction of canonical SIV epitope-specific CD8(+) T cell responses is suppressed by the RhCMV-encoded Rh189 gene (corresponding to human CMV US11), and the promiscuous MHC class I- and class II-restricted CD8(+) T cell responses occur only in the absence of the Rh157.5, Rh157.4, and Rh157.6 (human CMV UL128, UL130, and UL131) genes. Thus, CMV vectors can be genetically programmed to achieve distinct patterns of CD8(+) T cell epitope recognition.
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Affiliation(s)
- Scott G. Hansen
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Jonah B. Sacha
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Colette M. Hughes
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Julia C. Ford
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Benjamin J. Burwitz
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Isabel Scholz
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Roxanne M. Gilbride
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Matthew S. Lewis
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Awbrey N. Gilliam
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Abigail B. Ventura
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Daniel Malouli
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Guangwu Xu
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Rebecca Richards
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Nathan Whizin
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Jason S. Reed
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Katherine B. Hammond
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Miranda Fischer
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - John M. Turner
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Alfred W. Legasse
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Michael K. Axthelm
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Paul T. Edlefsen
- Population Sciences and Computational Biology Programs, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Jay A. Nelson
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Jeffrey D. Lifson
- AIDS and Cancer Virus Program, SAIC Frederick, Inc., Frederick National Laboratory, Frederick, MD 21702
| | - Klaus Früh
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
| | - Louis J. Picker
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006
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13
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Petrova G, Ferrante A, Gorski J. Cross-reactivity of T cells and its role in the immune system. Crit Rev Immunol 2012; 32:349-72. [PMID: 23237510 DOI: 10.1615/critrevimmunol.v32.i4.50] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
T-cell receptors recognize peptides presented by the major histocompatibility complex (MHC) on the surface of antigen-presenting cells (APC). The ability of the T-cell receptor (TCR) to recognize more than one peptide-MHC structure defines cross-reactivity. Cross-reactivity is a documented phenomenon of the immune system whose importance is still under investigation. There are a number of rational arguments for cross-reactivity. These include the discrepancy between the theoretical high number of pathogen-derived peptides and the lower diversity of the T-cell repertoire, the need for recognition of escape variants, and the intrinsic low affinity of this receptor-ligand pair. However, quantifying the phenomenon has been difficult, and its immunological importance remains unknown. In this review, we examined the cases for and against an important role for cross reactivity. We argue that it may be an essential feature of the immune system from the point of view of biological robustness.
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Affiliation(s)
- Galina Petrova
- The Blood Research Institute, Blood Center of Wisconsin, Milwaukee, Wisconsin 53226, USA
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14
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Rovira-Clavé X, Angulo-Ibáñez M, Noguer O, Espel E, Reina M. Syndecan-2 can promote clearance of T-cell receptor/CD3 from the cell surface. Immunology 2012; 137:214-25. [PMID: 22881146 DOI: 10.1111/j.1365-2567.2012.03626.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
T cells express the heparan sulphate proteoglycans syndecan-2 and syndecan-4. Syndecan-4 plays a T-cell inhibitory role; however, the function of syndecan-2 is unknown. In an attempt to examine this function, syndecan-2 was expressed constitutively in Jurkat T cells. Interestingly, the expression of syndecan-2 decreased the surface levels of T-cell receptor (TCR)/CD3 complex, concomitant with intracellular retention of CD3ε and partial degradation of the TCR-ζ chain. Immunofluorescence microscopy revealed that intracellular CD3ε co-located with Rab-4 endosomes. However, the intracellular pool of CD3ε did not recycle to the cell surface. The lower TCR/CD3 surface levels caused by syndecan-2 led to reduced TCR/CD3 responsiveness. We show that the cytosolic PDZ-binding domain of syndecan-2 is not necessary to elicit TCR/CD3 down-regulation. These results identify a previously unrecognized means of controlling surface TCR/CD3 expression by syndecan-2.
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Affiliation(s)
- Xavier Rovira-Clavé
- Departament de Biologia Cellular, Universitat de Barcelona, Barcelona, Spain
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15
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Quantitative events determine the differentiation and function of helper T cells. Nat Immunol 2011; 12:288-94. [DOI: 10.1038/ni.2003] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Decreased CD4 and wide-ranging expression of other immune receptors after HIV-envelope-mediated formation of syncytia in vitro. Arch Virol 2010; 155:1205-16. [PMID: 20508956 DOI: 10.1007/s00705-010-0704-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Accepted: 05/13/2010] [Indexed: 10/19/2022]
Abstract
In human HIV infection, multinucleated cells (syncytia) are formed by fusion of HIV-infected cells with CD4+ cells. In order to examine possible functional implications of syncytia formation for the immune response, the expression of important surface molecules by T-cell syncytia and surrounding cells that remain unfused (bystander cells) was analyzed in cocultures of HIV-Env- and CD4-expressing E6 Jurkat T cells. Fusion partners were differentially labeled with lipophilic probes, and syncytia and bystander cells were identified by flow cytometry. The cellular phenotype and response to activation stimulus after fusion were analyzed with antibodies coupled to third-party fluorochromes. Cocultured unfused E6 cells showed a marked decrease in CD4 expression, suggesting the selective recruitment of cells strongly expressing CD4 into syncytia. However, the incorporated CD4 was not detected in the syncytia, whereas the range of expression of CD28, ICAM-1, CXCR4 and CD3 was wider than that of unfused cells. Limited expression of CD4 in the bystander unfused population, as well as in the newly formed syncytia, would result in limitation of further viral entry and a failure to identify these cells, and it could partially contribute to functional impairment and a decrease in the number of CD4+ T cells in AIDS. Most of the syncytia were viable and expressed CD25 and IL-2 in response to activation by phorbol myristate acetate (PMA) and ionomicyn. Thus, syncytia populations harboring widely heterogeneous levels of receptors would constitute a potential source of anomalous immune function.
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17
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Daubeuf S, Préville X, Momot M, Misseri Y, Joly E, Hudrisier D. Improving administration regimens of CyaA-based vaccines using TRAP assays to detect antigen-specific CD8(+) T cells directly ex vivo. Vaccine 2009; 27:5565-73. [PMID: 19647811 DOI: 10.1016/j.vaccine.2009.07.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Revised: 07/01/2009] [Accepted: 07/14/2009] [Indexed: 11/30/2022]
Abstract
Vaccination with recombinant adenylate cyclase of Bordetella pertussis (CyaA) carrying antigen is a promising approach to target antigen-presenting cells. We have used Trogocytosis Analysis Protocol (TRAP) assays to monitor immune responses raised by different vaccination regimens with recombinant CyaA carrying the ovalbumin antigen. We find that the intradermal, intramuscular or subcutaneous routes are all superior to intravenous injections, and actually lead to a sufficiently high frequency of reactive CTL to be detected and characterized directly ex vivo by TRAP assay or other standard assays. Finally, for all routes, we find a clear boosting effect upon re-injection of the vaccine.
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Affiliation(s)
- Sandrine Daubeuf
- CNRS, IPBS (Institut de Pharmacologie et de Biologie Structurale), F-31077 Toulouse, France
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18
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Raué HP, Slifka MK. CD8+ T cell immunodominance shifts during the early stages of acute LCMV infection independently from functional avidity maturation. Virology 2009; 390:197-204. [PMID: 19539966 DOI: 10.1016/j.virol.2009.05.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Revised: 05/14/2009] [Accepted: 05/16/2009] [Indexed: 02/01/2023]
Abstract
Virus-specific T cell responses are often directed to a small subset of possible epitopes and their relative magnitude defines their hierarchy. We determined the size and functional avidity of 4 representative peptide-specific CD8(+) T cell populations in C57BL/6 mice at different time points after lymphocytic choriomeningitis virus (LCMV) infection. We found that the frequency of different peptide-specific T cell populations in the spleen changed independently over the first 8 days after infection. These changes were not associated with a larger or more rapid increase in functional avidity and yet still resulted in a shift in the final immunodominance hierarchy. Thus, the immunodominance observed at the peak of an antiviral T cell response is not necessarily determined by the initial size or rate of functional avidity maturation of peptide-specific T cell populations.
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Affiliation(s)
- Hans-Peter Raué
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, 505 NW 185th Avenue, Beaverton, OR 97006, USA
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19
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Hong JJ, Reynolds MR, Mattila TL, Hage A, Watkins DI, Miller CJ, Skinner PJ. Localized populations of CD8 MHC class I tetramer SIV-specific T cells in lymphoid follicles and genital epithelium. PLoS One 2009; 4:e4131. [PMID: 19122815 PMCID: PMC2607009 DOI: 10.1371/journal.pone.0004131] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2008] [Accepted: 12/02/2008] [Indexed: 11/18/2022] Open
Abstract
CD8 T cells play an important role in controlling viral infections. We investigated the in situ localization of simian immunodeficiency virus (SIV)-specific T cells in lymph and genital tissues from SIV-infected macaques using MHC-class I tetramers. The majority of tetramer-binding cells localized in T cell zones and were CD8+. Curiously, small subpopulations of tetramer-binding cells that had little to no surface CD8 were detected in situ both early and late post-infection, and in both vaginally and rectally inoculated macaques. These tetramer+CD8low/− cells were more often localized in apparent B cell follicles relative to T cell zones and more often found near or within the genital epithelium than the submucosa. Cells analyzed by flow cytometry showed similar populations of cells. Further immunohistological characterization revealed small populations of tetramer+CD20− cells inside B cell follicles and that tetramer+ cells did not stain with γδ-TCR nor CD4 antibodies. Negative control tetramer staining indicated that tetramer+CD8low/− cells were not likely NK cells non-specifically binding to MHC tetramers. These findings have important implications for SIV-specific and other antigen-specific T cell function in these specific tissue locations, and suggest a model in which antigen-specific CD8+ T cells down modulate CD8 upon entering B cell follicles or the epithelial layer of tissues, or alternatively a model in which only antigen-specific CD8 T cells that down-modulate CD8 can enter B cell follicles or the epithelium.
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Affiliation(s)
- Jung Joo Hong
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, Minnesota, United States of America
| | - Matthew R. Reynolds
- Wisconsin National Primate Research Center, University of Wisconsin Madison, Madison, Wisconsin, United States of America
| | - Teresa L. Mattila
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, Minnesota, United States of America
| | - Aaron Hage
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, Minnesota, United States of America
| | - David I. Watkins
- Wisconsin National Primate Research Center, University of Wisconsin Madison, Madison, Wisconsin, United States of America
| | | | - Pamela J. Skinner
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, Minnesota, United States of America
- * E-mail:
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20
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Abstract
Ligand binding to the multichain immune recognition receptors (MIRRs) leads to receptor triggering and subsequent lymphocyte activation. MIRR signal transduction pathways have been extensively studied, but it is still not clear how binding of the ligand to the receptor is initially communicated across the plasma membrane to the cells interior. Models proposed for MIRR triggering can be grouped into three categories. Firstly, ligand binding invokes receptor clustering, resulting in the approximation of kinases to the MIRR and receptor phosphorylation. Secondly, ligand binding induces a conformational change of the receptor. Thirdly, upon ligand-binding, receptors and kinases are segregated from phosphatases, leading to a net phosphorylation of the receptor. In this review, we focus on the homodclustering induced by multivalent ligands, the heterodustering induced by simultaneous binding of the ligand to the MIRR and a coreceptor and the pseudodimer model.
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21
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Machlenkin A, Uzana R, Frankenburg S, Eisenberg G, Eisenbach L, Pitcovski J, Gorodetsky R, Nissan A, Peretz T, Lotem M. Capture of tumor cell membranes by trogocytosis facilitates detection and isolation of tumor-specific functional CTLs. Cancer Res 2008; 68:2006-13. [PMID: 18339883 DOI: 10.1158/0008-5472.can-07-3119] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The success of adoptive cell transfer in the treatment of metastatic cancer in humans is dependent on the selection of highly active tumor-specific cytotoxic T cells. We report here that CTLs capture membrane fragments from their targets while exerting cytotoxic activity and thus gain a detectable functional signature by which they can be identified. Fluorochrome labeling or biotinylation was used to tag tumor cells. CD8(+) T cells were coincubated with the tagged targets, sorted, and functionally evaluated. Our results show that membrane capture by CD8(+) lymphocytes is T-cell receptor dependent, epitope specific, and preferentially associated with highly cytotoxic clonal subsets. CTLs that captured membranes from unmodified melanoma exhibited enhanced cytotoxic activity against tumor cell lines and autologous melanoma. In a human melanoma in vivo model, adoptive transfer of membrane-capturing, peptide-specific T cells, but not noncapturing or bulk CD8(+) T cells, inhibits tumor progression. Membrane capture is therefore a signature of antigen-specific CTLs endowed with high functional avidity and may have direct relevance in the clinical application of adoptive immunotherapy.
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Affiliation(s)
- Arthur Machlenkin
- Sharett Institute of Oncology, Hadassah-Hebrew University Hospital, Jerusalem, Israel
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22
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Paillot R, Grimmett H, Elton D, Daly JM. Protection, systemic IFNγ, and antibody responses induced by an ISCOM-based vaccine against a recent equine influenza virus in its natural host. Vet Res 2008; 39:21. [DOI: 10.1051/vetres:2007062] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2007] [Accepted: 11/09/2007] [Indexed: 11/14/2022] Open
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23
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Laugel B, van den Berg HA, Gostick E, Cole DK, Wooldridge L, Boulter J, Milicic A, Price DA, Sewell AK. Different T cell receptor affinity thresholds and CD8 coreceptor dependence govern cytotoxic T lymphocyte activation and tetramer binding properties. J Biol Chem 2007; 282:23799-810. [PMID: 17540778 DOI: 10.1074/jbc.m700976200] [Citation(s) in RCA: 173] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
T cells have evolved a unique system of ligand recognition involving an antigen T cell receptor (TCR) and a coreceptor that integrate stimuli provided by the engagement of peptide-major histocompatibility complex (pMHC) antigens. Here, we use altered pMHC class I (pMHCI) molecules with impaired CD8 binding (CD8-null) to quantify the contribution of coreceptor extracellular binding to (i) the engagement of soluble tetrameric pMHCI molecules, (ii) the kinetics of TCR/pMHCI interactions on live cytotoxic T lymphocytes (CTLs), and (iii) the activation of CTLs by cell-surface antigenic determinants. Our data indicate that the CD8 coreceptor substantially enhances binding efficiency at suboptimal TCR/pMHCI affinities through effects on both association and dissociation rates. Interestingly, coreceptor requirements for efficient tetramer labeling of CTLs or for CTL activation by determinants displayed on the cell surface operated in different TCR/pMHCI affinity ranges. Wild-type and CD8-null pMHCI tetramers required monomeric affinities for cognate TCRs of KD < approximately 80 microM and approximately 35 microM, respectively, to label human CTLs at 37 degrees C. In contrast, activation by cellular pMHCI molecules was strictly dependent on CD8 binding only for TCR/pMHCI interactions with KD values >200 microM. Altogether, our data provide information on the binding interplay between CD8 and the TCR and support a model of CTL activation in which the extent of coreceptor dependence is inversely correlated to TCR/pMHCI affinity. In addition, the results reported here define the range of TCR/pMHCI affinities required for the detection of antigen-specific CTLs by flow cytometry.
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Affiliation(s)
- Bruno Laugel
- Nuffield Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, United Kingdom
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24
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Thedrez A, de Lalla C, Allain S, Zaccagnino L, Sidobre S, Garavaglia C, Borsellino G, Dellabona P, Bonneville M, Scotet E, Casorati G. CD4 engagement by CD1d potentiates activation of CD4+ invariant NKT cells. Blood 2007; 110:251-8. [PMID: 17363727 DOI: 10.1182/blood-2007-01-066217] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The CD4 coreceptor is crucial in the activation of major histocompatibility complex (MHC) class II restricted CD4 (+) T lymphocytes by binding the same MHC class as the T-cell receptor (TCR) and by potentiating TCR-dependent signaling. CD4 is also expressed by invariant natural killer T cells (iNKT), which recognize natural and synthetic lipid antigens, such as alpha-galactosyl ceramide (alpha-GalCer), in association with the MHC class I-like CD1d molecule. Human iNKT cells can be divided into 2 major subsets depending on CD4 expression: CD4 (+) iNKT preferentially produce T-helper (Th)0/Th2 cytokines, whereas CD4(-) iNKT cells produce Th1 cytokines after antigenic activation. Cytokines produced by iNKT may have immunomodulatory roles in various physiopathologic contexts, but their mode of regulation by iNKT cells remains ill-defined. Using blocking reagents neutralizing CD4 binding, experimental systems where MHC class II molecules are absent and recombinant alpha-GalCer/CD1d complexes, we show that CD4 potentiates human iNKT cell activation by engaging CD1d molecules. These results indicate that the CD4 coreceptors may contribute to the fine tuning of iNKT cells reactivity.
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Affiliation(s)
- Aurelie Thedrez
- Institute Nationale Scientifique et Recherche Medicale, Nantes, France
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25
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Milovanova TN. Comparative analysis between CFSE flow cytometric and tritiated thymidine incorporation tests for beryllium sensitivity. CYTOMETRY PART B-CLINICAL CYTOMETRY 2007; 72:265-75. [PMID: 17328032 DOI: 10.1002/cyto.b.20166] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND In this study, we evaluated alternative possibility for CFSE beryllium flow cytometric test against beryllium blood lymphocyte proliferation test (BeLPT) as a standard radioactive clinical screening method to identify sensitization to beryllium. METHODS Delta PD (the ratio of divided cell population to the total number of cells with subtracted counts of unstimulated cells) of specific beryllium-induced pathogenic CD3+ CD4+ T-lymphocytes and stimulation index (SI) in CFSE proliferation test was compared with delta counts per minute (mean test CPM minus mean control CPM) and SI in radioactive blood BeLPT. RESULTS Comparison analysis of CFSE and BeLPT demonstrated excellent agreement between delta PD and delta CPM (kappa = 0.845, P << 0.0001). We determined 6.8% positive subjects in the beryllium-exposed, Be-LPT-negative group. The decreased mean difference of these indexes to percentage of average and the long tail in the plot reflects increased sensitivity. CFSE/CD4+ T-cell proliferation assay has 100% specificity, significantly higher sensitivity and efficiency than BeLPT. CONCLUSIONS Both delta PD, measured by the precursor frequencies method in CFSE assay and delta CPM, defined by tritiated thymidine in BeLPT, can be used for the enumeration of beryllium specific CD4+ T-cell proliferation and may substantially improve the quality of the early diagnosis of beryllium hypersensitivity.
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Affiliation(s)
- Tatyana N Milovanova
- Department of Pathology and Laboratory Medicine, Flow Cytometry and Cell Sorting Facility, Abramson Cancer Center, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania 19104, USA.
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26
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Itoh Y, Wang Z, Ishida H, Eichelberg K, Fujimoto N, Makino J, Ogasawara K, Germain RN. Decreased CD4 expression by polarized T helper 2 cells contributes to suboptimal TCR-induced phosphorylation and reduced Ca2+ signaling. Eur J Immunol 2005; 35:3187-95. [PMID: 16276482 PMCID: PMC1459334 DOI: 10.1002/eji.200526064] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Polarized Th1 and Th2 cells expressing the same TCR produce distinct biochemical responses to ligand engagement. Compared to Th1 cells, Th2 cells show altered substrate tyrosine phosphorylation and a diminished or transient Ca2+ response. Here we demonstrate that agonist stimulation of Th1 cells leads to the predominant appearance of fully phosphorylated (p23) TCR zeta, substantial phosphorylation of zeta-associated protein 70 (ZAP-70), and strong elevation of intracellular Ca2+, whereas agonist stimulation of Th2 cells expressing an identical TCR results in an elevated p21:p23 TCR zeta ratio, little or no detectable ZAP-70 phosphorylation, and a more limited elevation in intracellular Ca2+. Th2 cells consistently had twofold lower surface CD4 expression as compared to Th1 cells with the same TCR. When CD4 levels in Th2 cells were raised to Th1 levels using retroviral gene transfer, the transduced cells showed greater generation of p23 phospho-zeta, measurable phosphorylation of ZAP-70, and increased Ca2+ responses. These findings suggest that the apparent qualitative differences in TCR signaling characterizing Th1 versus Th2 cells are largely the result of modest quantitative variation in CD4 expression, with decreased CD4 expression playing a significant role in attenuating the proximal signaling responsiveness of Th2 cells to TCR ligands.
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Affiliation(s)
- Yasushi Itoh
- Department of Pathology, Shiga University of Medical Science, Shiga, Japan
- Lymphocyte Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Ze Wang
- Lymphocyte Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Hideaki Ishida
- Department of Pathology, Shiga University of Medical Science, Shiga, Japan
| | - Katrin Eichelberg
- Lymphocyte Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Noriki Fujimoto
- Department of Pathology, Shiga University of Medical Science, Shiga, Japan
- Department of Dermatology, Shiga University of Medical Science, Shiga, Japan
| | - Jin Makino
- Department of Pathology, Shiga University of Medical Science, Shiga, Japan
- Department of Internal Medicine, Shiga University of Medical Science, Shiga, Japan
| | - Kazumasa Ogasawara
- Department of Pathology, Shiga University of Medical Science, Shiga, Japan
| | - Ronald N. Germain
- Lymphocyte Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
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27
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Kemp RA, Bäckström BT, Ronchese F. The phenotype of type 1 and type 2 CD8+ T cells activated in vitro is affected by culture conditions and correlates with effector activity. Immunology 2005; 115:315-24. [PMID: 15946249 PMCID: PMC1782161 DOI: 10.1111/j.1365-2567.2005.02168.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2004] [Revised: 02/08/2005] [Accepted: 03/04/2005] [Indexed: 11/30/2022] Open
Abstract
We used various culture conditions to generate type 1 (Tc1) or type 2 (Tc2) cytotoxic T cells in vitro. T-cell receptor (TCR) transgenic T cells were cultured with antigen and spleen cells, or antigen and dendritic cells (DC), or anti-CD3 and anti-CD28. Tc1 cultures contained interleukin (IL)-2 and IL-6, and Tc2 cultures contained IL-2, IL-6 and IL-4. Tc2 cells generated in each culture condition acquired a CD62L(low) CD44(high) phenotype, had high cytotoxic activity, and secreted IL-4, IL-5 and moderate amounts of interferon-gamma (IFN-gamma). In contrast, the phenotype and function of Tc1 cells varied depending on culture conditions. Tc1 cells from anti-CD3 and anti-CD28 cultures had high cytotoxic activity and were CD62L(low) CD44(high), while Tc1 cells from antigen and spleen cell cultures had low cytotoxic activity and were CD62L(high) CD44(low). Tc1 cells from antigen and DC cultures had an intermediate phenotype. All Tc1 cells secreted high amounts of IFN-gamma, but only Tc1 from anti-CD3 and anti-CD28 cultures had antitumour activity in vivo. Differences were not caused by suboptimal culture conditions, as Tc1 cells divided at a similar rate whether cultured with antigen and spleen cells or with anti-CD3 and anti-CD28. We conclude that IL-4 not only induces 'type 2' cytokine secretion in CD8(+) T cells, but also affects their expression of surface markers and cytotoxic activity.
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Affiliation(s)
- Roslyn A Kemp
- Malaghan Institute of Medical Research, Wellington, New Zealand
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28
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Kienzle N, Olver S, Buttigieg K, Groves P, Janas ML, Baz A, Kelso A. Progressive differentiation and commitment of CD8+ T cells to a poorly cytolytic CD8low phenotype in the presence of IL-4. THE JOURNAL OF IMMUNOLOGY 2005; 174:2021-9. [PMID: 15699131 DOI: 10.4049/jimmunol.174.4.2021] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Exposure to IL-4 during activation of naive murine CD8+ T cells leads to generation of IL-4-producing effector cells with reduced surface CD8, low perforin, granzyme B and granzyme C mRNA, and poor cytolytic function. We show in this study that maximal development of these cells depended on exposure to IL-4 for the first 5 days of activation. Although IL-4 was not required at later times, CD8 T cell clones continued to lose surface CD8 expression with prolonged culture, suggesting commitment to the CD8low phenotype. This state was reversible in early differentiation. When single CD8low cells from 4-day cultures were cultured without IL-4, 65% gave rise to clones that partly or wholly comprised CD8high cells; the proportion of reverted clones was reduced or increased when the cells were cloned in the presence of IL-4 or anti-IL-4 Ab, respectively. CD8 expression positively correlated with perforin and granzyme A, B, and C mRNA, and negatively correlated with IL-4 mRNA levels among these clones. By contrast, most CD8low cells isolated at later time points maintained their phenotype, produced IL-4, and exhibited poor cytolytic function after many weeks in the absence of exogenous IL-4. We conclude that IL-4-dependent down-regulation of CD8 is associated with progressive differentiation and commitment to yield IL-4-producing cells with little cytolytic activity. These data suggest that the CD4-CD8- cells identified in some disease states may be the product of a previously unrecognized pathway of effector differentiation from conventional CD8+ T cells.
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Affiliation(s)
- Norbert Kienzle
- Cooperative Research Centre for Vaccine Technology and Queensland Institute of Medical Research, Brisbane, Queensland, Australia.
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29
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Tavano R, Gri G, Molon B, Marinari B, Rudd CE, Tuosto L, Viola A. CD28 and lipid rafts coordinate recruitment of Lck to the immunological synapse of human T lymphocytes. THE JOURNAL OF IMMUNOLOGY 2004; 173:5392-7. [PMID: 15494485 DOI: 10.4049/jimmunol.173.9.5392] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In T lymphocytes, the Src family kinase Lck associates lipid rafts and accumulates at the immunological synapse (IS) during T cell stimulation by APCs. Using CD4- or CD28-deficient murine T cells, it was suggested that recruitment of Lck to the IS depends on CD4, whereas CD28 sustains Lck activation. However, in human resting T cells, CD28 is responsible for promoting recruitment of lipid rafts to the IS by an unknown mechanism. Thus, we performed a series of experiments to determine 1) whether Lck is recruited to the IS through lipid rafts; and 2) whether Lck recruitment to the IS of human resting T cells depends on CD4 or on CD28 engagement. We found that CD28, but not CD4, stimulation induced recruitment of Lck into detergent-resistant domains as well as its accumulation at the IS. We also found that Lck recruitment to the IS depends on the CD28 COOH-terminal PxxPP motif. Thus, the CD28-3A mutant, generated by substituting the prolines in positions 208, 211, and 212 with alanines, failed to induce Lck and lipid raft accumulation at the synapse. These results indicate that CD28 signaling orchestrates both Lck and lipid raft recruitment to the IS to amplify T cell activation.
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Affiliation(s)
- Regina Tavano
- Venetian Institute of Molecular Medicine and Department of Biomedical Science, University of Padua, Padua, Italy
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30
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Boyle LH, Goodall JC, Gaston JSH. Major histocompatibility complex class I-restricted alloreactive CD4+ T cells. Immunology 2004; 112:54-63. [PMID: 15096184 PMCID: PMC1782457 DOI: 10.1111/j.1365-2567.2004.01857.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Although it is well established that CD4+ T cells generally recognize major histocompatibility complex (MHC) class II molecules, MHC class I-reactive CD4+ T cells have occasionally been reported. Here we describe the isolation and characterization of six MHC class I-reactive CD4+ T-cell lines, obtained by co-culture of CD4+ peripheral blood T cells with the MHC class II-negative, transporter associated with antigen processing (TAP)-negative cell line, T2, transfected with human leucocyte antigen (HLA)-B27. Responses were inhibited by the MHC class I-specific monoclonal antibody (mAb), W6/32, demonstrating the direct recognition of MHC class I molecules. In four cases, the restriction element was positively identified as HLA-A2, as responses by these clones were completely inhibited by MA2.1, an HLA-A2-specific mAb. Interestingly, three of the CD4+ T-cell lines only responded to cells expressing HLA-B27, irrespective of their restricting allele, implicating HLA-B27 as a possible source of peptides presented by the stimulatory MHC class I alleles. In addition, these CD4+ MHC class I alloreactive T-cell lines could recognize TAP-deficient cells and therefore may have particular clinical relevance to situations where the expression of TAP molecules is decreased, such as viral infection and transformation of cells.
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Affiliation(s)
- Louise H Boyle
- Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK
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31
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Hedfors IA, Brinchmann JE. Long-term proliferation and survival of in vitro-activated T cells is dependent on Interleukin-2 receptor signalling but not on the high-affinity IL-2R. Scand J Immunol 2003; 58:522-32. [PMID: 14629624 DOI: 10.1046/j.1365-3083.2003.01338.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Optimization of T-cell-activation protocols is an important prerequisite for the use of populations of activated, polyclonal T cells for immunotherapeutic purposes. This study compares two activation protocols. Following initial CD3/CD28 activation, naïve and memory subsets of CD8+ and CD4+ T cells were either repeatedly stimulated or maintained in medium containing interleukin-2 (IL-2). Initially, activation-induced cell death (AICD) was observed in all subsets. After 2-3 days, death in the cultures maintained in IL-2 only dropped dramatically, while live cells increased logarithmically. Despite intense proliferation, these cells lost the expression of CD25, the alpha chain of the IL-2 receptor and CD71, the transferrin receptor. Functional blocking of CD25 caused minimal changes in proliferation and survival of these cells as long as IL-2 was present in the medium. Blocking of CD25 in combination with the removal of IL-2 caused rapid death of these cells. Restimulation every 3-4 days led to persistently high levels of AICD and lower live cell counts. Live cells maintained the expression of activation markers and a blastoid phenotype. Initial CD3/CD28 followed by maintenance in IL-2 for 2-3 weeks seems to be the best in vitro T-cell-activation strategy. Signalling through the IL-2 receptor is vital for these cells, despite their downregulation of CD25.
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Affiliation(s)
- I A Hedfors
- Institute of Immunology, Rikshospitalet University Hospital, Oslo, Norway
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32
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Hirata H, Arima M, Cheng G, Honda K, Asakura T, Fukushima F, Yamaguchi B, Yoshida N, Fukuda T. Effects of CD80 and CD86 on cytokine production in patients with wasp-venom allergy who receive venom immunotherapy. Cytokine 2003; 24:1-6. [PMID: 14561485 DOI: 10.1016/s1043-4666(03)00218-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Several studies have provided evidence that activation of antigen-specific T cells requires interactions between CD28 on T cells and its ligands, CD80 and CD86, on antigen-presenting cells (APCs). However, the effects of CD80 and CD86 on cytokine production in patients with Hymenoptera venom allergy who receive venom immunotherapy remain unclear. We examined the effects of CD80 and CD86 on Th1- and Th2-cytokine production before and after venom immunotherapy in patients with wasp-venom allergy. Peripheral blood mononuclear cells (PBMCs) were isolated from patients with wasp-venom allergy before and after three months of venom immunotherapy. CD4+ T cells and monocytes were isolated as APCs from PBMCs and were cocultured with wasp venom in the presence of anti-CD80 or -CD86 blocking antibodies. Interleukin (IL)-4, IL-10, and interferon (IFN)-gamma were measured by enzyme-linked immunosorbent assay. The expression of CD80 and CD86 on CD14+ PBMCs was detected by fluorescence-activated cell-sorter analysis. The expression of CD86, but not that of CD80, on CD14+ PBMCs cocultured with venom increased after three months of venom immunotherapy, but not before venom immunotherapy. Blockade of CD86 reduced IL-10 production after three months of venom immunotherapy. IL-10 production promoted by CD86 costimulation may be involved in the mechanism of venom immunotherapy in patients with venom allergy.
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Affiliation(s)
- Hirokuni Hirata
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo University School of Medicine, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293, Japan
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33
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Trautmann A, Rückert B, Schmid-Grendelmeier P, Niederer E, Bröcker EB, Blaser K, Akdis CA. Human CD8 T cells of the peripheral blood contain a low CD8 expressing cytotoxic/effector subpopulation. Immunology 2003; 108:305-12. [PMID: 12603596 PMCID: PMC1782903 DOI: 10.1046/j.1365-2567.2003.01590.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Heterogeneity of lymphocyte populations demonstrates the diversity of cellular immune responses and provide a better understanding of the immune system. CD3+ CD8+ T cells exhibit a low CD8 expressing (CD8low) population in flow cytometric analysis of peripheral blood T cells. In healthy donors, this population consists of 0.2-7.0% of all CD8 T cells. The majority of the CD8low T cell population showed an elevated expression of CD25, CD45RA, and CD95L, and low levels of CD28, CD62L and CD45RO. Circulating CD8low T cells resemble cytotoxic effector cells because they express cytolytic mediators and are able to execute cytotoxicity. A restricted T cell receptor profile with increased Vbeta9, Vbeta14 and Vbeta23 expression was observed and the CD8low T cell population contain Epstein-Barr virus-specific T cells. Therefore, the CD8low population represent a subset of activated CD8 effector T cells, resulting most probably from a continuous and/or balanced immune response to intracellular pathogens.
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Affiliation(s)
- Axel Trautmann
- Swiss Institute of Allergy and Asthma Research (SIAF), Obere Strasse 22, CH-7270 Davos, Switzerland.
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34
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Holler PD, Kranz DM. Quantitative analysis of the contribution of TCR/pepMHC affinity and CD8 to T cell activation. Immunity 2003; 18:255-64. [PMID: 12594952 DOI: 10.1016/s1074-7613(03)00019-0] [Citation(s) in RCA: 285] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The relative roles of CD8, TCR:pepMHC affinity, and TCR:pepMHC dissociation rate in T cell activation have remained controversial. To determine the relationships among these factors, we used T cells transfected with normal and in vitro engineered alphabeta TCRs, in the presence or absence of CD8. The TCRs exhibited a wide range of affinities (K(D) values of 80 microM to 5 nM). T cells with the highest affinity TCRs were efficiently stimulated by peptide, with or without CD8. In contrast, CD8 was required for T cells that expressed TCRs with affinities typical of syngeneic reactions (K(D) values above approximately 3 microM). The results suggest that virtually all normal syngeneic interactions require CD8, which enhances peptide sensitivity by one million-fold or more.
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Affiliation(s)
- Phillip D Holler
- Department of Biochemistry, University of Illinois, Urbana, IL 61801, USA
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35
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Hirata H, Arima M, Cheng G, Honda K, Fukushima F, Yoshida N, Eda F, Fukuda T. Production of TARC and MDC by naive T cells in asthmatic patients. J Clin Immunol 2003; 23:34-45. [PMID: 12645858 DOI: 10.1023/a:1021948214742] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The helper (Th)2 cell-attracting chemokines thymus and activation-regulated chemokine (TARC) and macrophage-derived chemokine (MDC) are ligands for the chemokine receptor CCR4. A number of cellular sources of TARC and MDC have been identified, including not only macrophages, dendritic cells, and natural killer cells, but also bronchial epithelial cells. Recent studies report that TARC and MDC may serve as pivotal chemokines for the development of Th2-dominated experimental allergen-induced asthma. This study was designed to assess TARC and MDC production by CD4+ T cells, including naive T cells and memory/effector T cells, purified from peripheral blood mononuclear cells in patients with asthma. Asthmatic subjects included in this study had mild asthmatic symptoms, positive skin test responses to house dust mite allergen, and elevated level of Dermatophagoides farinae immunoglobulin E in the sera. CD4+ T cells--CD45RA+ CD4+ T cells--as naive T cells and CD45RO+ CD4+ T cells--as memory/effector T cells--were purified by negative selection from peripheral blood mononuclear cells obtained from asthmatic patients (n = 6) and healthy controls (n = 6). These cells and established Th1/Th2 cell lines were then cultured in the presence of both anti-CD3 and -CD28 antibodies. After 48 hr of incubation, concentrations of TARC, MDC, interleukin (IL)-4, IL-5, and interferon-gamma in the supernatants were measured by enzyme-linked immunoadsorbent assay. Reverse transcriptase-polymerase chain reaction was performed to analyze mRNA expression of TARC and MDC. Our results clearly showed that TARC and MDC were produced by activated CD45RA+ CD4+ T cells rather than by activated CD45RO+ CD4+ T cells, and the levels of these chemokines in the asthmatic patients were higher than those in the healthy controls. Furthermore, these chemokines production by Th2 cell lines were greater than those by Th1 cell lines, but the level were smaller than those by naive T cells. Our studies suggest that TARC and MDC are produced by naive T cells rather than by memory/effector T cells, including Th2 cells, in asthmatic patients, and these chemokines were produced at modest levels in any T-cell populations from healthy controls. Taken together, naive T cells in asthma have a peculiar function to produce TRAC and MDC, which contribute to local migration of Th2 cells into lung and lymphoid tissues, along with a function as precursor for memory/effector T cell. This novel function of naive T cells may be implicated in the development of asthma.
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Affiliation(s)
- Hirokuni Hirata
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo University School of Medicine, Mibu-machi, Shimotsuga-gun, Tochigi, 321-0293, Japan
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36
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Badran BM, Wolinsky SM, Burny A, Willard-Gallo KE. Identification of three NFAT binding motifs in the 5'-upstream region of the human CD3gamma gene that differentially bind NFATc1, NFATc2, and NF-kappa B p50. J Biol Chem 2002; 277:47136-48. [PMID: 12374807 DOI: 10.1074/jbc.m206330200] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Human immunodeficiency virus, type 1 (HIV-1) infection of CD4(+) T cells progressively abrogates T cell receptor (TCR).CD3 function and surface expression by specifically interfering with CD3gamma gene transcription. Our data show that the loss of CD3gamma transcripts begins very early after infection and accumulates to a >90% deficiency before a significant effect on surface receptor density is apparent. Blocking TCR.CD3-directed NFAT activation with cyclosporin A provokes a partial re-expression of CD3gamma gene transcripts and surface complexes in a time- and dose-dependent manner. We have identified three NFAT consensus sequences (5'-GGAAA-3') in the 5'-upstream region of the human CD3gamma gene at: -124 to -120 (NFAT(gamma1)), -384 to -380 (NFAT(gamma2)), and +450 to +454 (NFAT(gamma3)) from the first transcription initiation site. Using electrophoretic mobility shift and supershift assays, we show that NFATc2 alone binds to the NFAT(gamma2) motif; however, complexes containing either NFATc2 or NFATc1 plus NF-kappaB p50 bind to the NFAT(gamma1) and NFAT(gamma3) sites. We further demonstrate that NFATc1 and NF-kappaB p50 bind in the same protein.DNA complex and that a fourth Ala added to the core sequence (5'-GGAAAA-3') in NFAT(gamma1), and NFAT(gamma3) is critical for their binding. Finally, we have shown that an increase in the binding of nuclear NFATc2, NFATc1, and NF-kappaB p50 to these three motifs is correlated with a progressive loss of CD3gamma transcripts after HIV-1 infection.
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Affiliation(s)
- Bassam M Badran
- Laboratory of Experimental Hematology, Faculty of Medicine, University of Brussels, 121 Blvd. de Waterloo, Brussels B1000, Belgium
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37
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Cawthon AG, Alexander-Miller MA. Optimal colocalization of TCR and CD8 as a novel mechanism for the control of functional avidity. THE JOURNAL OF IMMUNOLOGY 2002; 169:3492-8. [PMID: 12244138 DOI: 10.4049/jimmunol.169.7.3492] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The improved efficacy of high avidity CTL for clearance of virus has been well-documented. Thus, elucidation of the mechanisms that confer the increased sensitivity to peptide ligand demonstrated by high avidity CTL is critical. Using CTL lines of high and low avidity generated from a TCR transgenic mouse, we have found that functional avidity can be controlled by the expression of CD8alphaalpha vs CD8alphabeta and the ability of CTLs to colocalize the TCR and CD8 in the membrane. Colocalization of these molecules was mediated by lipid rafts and importantly, raft disruption resulted in the conversion of high avidity CTL into a lower functional avidity phenotype. These novel findings provide insights into the control of functional avidity in response to viral infection.
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MESH Headings
- Animals
- CD8 Antigens/biosynthesis
- CD8 Antigens/metabolism
- CD8 Antigens/physiology
- Cell Line
- Coculture Techniques
- Cytotoxicity, Immunologic
- Immunophenotyping
- Lymphocyte Activation
- Lymphocyte Specific Protein Tyrosine Kinase p56(lck)/biosynthesis
- Membrane Microdomains/immunology
- Membrane Microdomains/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/metabolism
- Receptors, Antigen, T-Cell/physiology
- T-Lymphocytes, Cytotoxic/enzymology
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
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Affiliation(s)
- Andrew G Cawthon
- Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA
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38
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Tuosto L, Marinari B, Piccolella E. CD4-Lck through TCR and in the absence of Vav exchange factor induces Bax increase and mitochondrial damage. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 168:6106-12. [PMID: 12055221 DOI: 10.4049/jimmunol.168.12.6106] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In the present study, we aimed to demonstrate that CD4 may represent a critical turning point that governs the apoptotic and survival programs in T cells, without modifying the physical association with the TCR-CD3 complex. To address this issue, we have explored the possibility that the activation of CD4 may transduce apoptotic signals unless signaling effectors neutralize them. Our data show that in Jurkat T cells CD4 engagement by Leu3a mAb results in a rapid and strong increase of Lck kinase activity, subsequent alterations of mitochondrial membrane potential, and apoptosis. Critical parameters are coassociation of CD4/Lck with TCR/CD3 and up-regulation of the proapoptotic protein Bax. Indeed, Leu3a-mediated Lck activation failed to induce apoptotic features in Jurkat cells either defective for TCR/CD3 or overexpressing the antiapoptotic protein Bcl-2. Furthermore, we demonstrate that Leu3a treatment of Jurkat cells overexpressing Vav results in the inhibition of mitochondrial damage and apoptosis; this rescue effect is accompanied with a significant decrease of Bax expression observed in apoptotic cells. Our evidence that the activation of Lck activates in T cells apoptotic pathways which are counteracted by Vav, a signaling molecule that cooperates with CD28 to boost TCR signals, suggests a novel role for costimulation in protecting T cells from CD4-mediated cell death.
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Affiliation(s)
- Loretta Tuosto
- Department of Cellular and Developmental Biology, La Sapienza University, Rome, Italy
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39
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Jäger E, Salter R, Castelli C, Höhn H, Freitag K, Karbach J, Neukirch C, Necker A, Knuth A, Maeurer MJ. Impact of antigen presentation on TCR modulation and cytokine release: implications for detection and sorting of antigen-specific CD8+ T cells using HLA-A2 wild-type or HLA-A2 mutant tetrameric complexes. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 168:2766-72. [PMID: 11884444 DOI: 10.4049/jimmunol.168.6.2766] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Soluble MHC class I molecules loaded with antigenic peptides are available either to detect and to enumerate or, alternatively, to sort and expand MHC class I-restricted and peptide-reactive T cells. A defined number of MHC class I/peptide complexes can now be implemented to measure T cell responses induced upon Ag-specific stimulation, including CD3/CD8/zeta-chain down-regulation, pattern, and quantity of cytokine secretion. As a paradigm, we analyzed the reactivity of a Melan-A/MART-1-specific and HLA-A2-restricted CD8(+) T cell clone to either soluble or solid-phase presented peptides, including the naturally processed and presented Melan-A/MART-1 peptide AAGIGILTV or the peptide analog ELAGIGILTV presented either by the HLA-A2 wild-type (wt) or mutant (alanineright arrowvaline aa 245) MHC class I molecule, which reduces engagement of the CD8 molecule with the HLA-A2 heavy chain. Soluble MHC class I complexes were used as either monomeric or tetrameric complexes. Soluble monomeric MHC class I complexes, loaded with the Melan-A/MART-1 peptide, resulted in CD3/CD8 and TCR zeta-chain down-regulation, but did not induce measurable cytokine release. In general, differences pertaining to CD3/CD8/zeta-chain regulation and cytokine release, including IL-2, IFN-gamma, and GM-CSF, were associated with 1) the format of Ag presentation (monomeric vs tetrameric MHC class I complexes), 2) wt vs mutant HLA-A2 molecules, and 3) the target Ag (wt vs analog peptide). These differences are to be considered if T cells are exposed to recombinant MHC class I Ags loaded with peptides implemented for detection, activation, or sorting of Ag-specific T cells.
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MESH Headings
- Amino Acid Substitution/genetics
- Antigen Presentation/genetics
- CD8 Antigens/biosynthesis
- CD8 Antigens/metabolism
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- Cytokines/biosynthesis
- Cytokines/metabolism
- Cytotoxicity, Immunologic/genetics
- Down-Regulation/genetics
- Down-Regulation/immunology
- Epitopes, T-Lymphocyte/genetics
- Epitopes, T-Lymphocyte/immunology
- Epitopes, T-Lymphocyte/metabolism
- HLA-A2 Antigen/genetics
- HLA-A2 Antigen/immunology
- Humans
- Membrane Proteins/antagonists & inhibitors
- Membrane Proteins/biosynthesis
- Membrane Proteins/metabolism
- Mutagenesis, Site-Directed
- Receptor-CD3 Complex, Antigen, T-Cell/antagonists & inhibitors
- Receptor-CD3 Complex, Antigen, T-Cell/biosynthesis
- Receptor-CD3 Complex, Antigen, T-Cell/metabolism
- Receptors, Antigen, T-Cell/antagonists & inhibitors
- Receptors, Antigen, T-Cell/biosynthesis
- Receptors, Antigen, T-Cell/metabolism
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Affiliation(s)
- Elke Jäger
- Medizinische Klinik II, Hämatologie-Onkologie, Krankenhaus Nordwest, Frankfurt, Germany
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40
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Fehérvári Z, Cooke A, Brett S, Turner J. Perturbation of naive TCR transgenic T cell functional responses and upstream activation events by anti-CD4 monoclonal antibodies. Eur J Immunol 2002; 32:333-40. [PMID: 11807772 DOI: 10.1002/1521-4141(200202)32:2<333::aid-immu333>3.0.co;2-t] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
It is well established that non-depleting anti-CD4 monoclonal antibodies (mAb) have potent immunomodulatory properties in vivo and as such can induce a profound state of tolerance. Receptor blockade, CD4 modulation, or the transmission of a negative signal have all been proposed to explain their effects, however their precise mechanism of action, particularly at the level of cellular signaling, remains obscure. Experiments were thus carried out to examine the underlying mechanisms of action of two non-depleting anti-mouse CD4 mAb, YTS177 and KT6, which differ in their ability to modulate CD4 expression. The effects of the mAb were examined on CD4(+) T cells derived from D0.11.10 TCR transgenic mice. Functional studies revealed that both mAb could effectively block antigen-driven proliferation and IL-2 production but had only modest effects at higher peptide doses. Importantly, mAb pre-treatment of T cells stimulated by sub-optimal peptide seemed to induce an anergy-like state making them unresponsive to subsequent re-stimulation. Analysis of intracellular signaling demonstrated that certain key upstream events such as the phosphorylation of Zap-70 and LAT were also blocked by mAb pretreatment which may be due to interference with stable T cell-APC conjugate formation.
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Affiliation(s)
- Zoltán Fehérvári
- Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QP, GB
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41
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Utermöhlen O, Schulze-Garg C, Warnecke G, Gugel R, Löhler J, Deppert W. Simian virus 40 large-T-antigen-specific rejection of mKSA tumor cells in BALB/c mice is critically dependent on both strictly tumor-associated, tumor-specific CD8(+) cytotoxic T lymphocytes and CD4(+) T helper cells. J Virol 2001; 75:10593-602. [PMID: 11602701 PMCID: PMC114641 DOI: 10.1128/jvi.75.22.10593-10602.2001] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Protective immunity of BALB/c mice immunized with simian virus 40 (SV40) large T antigen (TAg) against SV40-transformed, TAg-expressing mKSA tumor cells is critically dependent on both CD8(+) and CD4(+) T lymphocytes. By depleting mice of T-cell subsets at different times before and after tumor challenge, we found that at all times, CD4(+) and CD8(+) cells both were equally important in establishing and maintaining a protective immune response. CD4(+) cells do not contribute to tumor eradication by directly lysing mKSA cells. However, CD4(+) lymphocytes provide help to CD8(+) cells to proliferate and to mature into fully active cytotoxic T lymphocytes (CTL). Depletion of CD4(+) cells by a single injection of CD4-specific monoclonal antibody at any time from directly before injection of the vaccinating antigen to up to 7 days after tumor challenge inhibited the generation of cytolytic CD8(+) lymphocytes. T helper cells in this system secrete the typical Th-1 cytokines interleukin 2 (IL-2) and gamma interferon. Because in this system TAg-specific CD8(+) cells secrete only minute amounts of IL-2, it appears that T helper cells provide these cytokines for CD8(+) T cells. Moreover, this helper effect of CD4(+) T cells in mKSA tumor rejection in BALB/c mice does not simply improve the activity of TAg-specific CD8(+) CTL but actually enables them to mature into cytolytic effector cells. Beyond this activity, the presence of T helper cells is necessary even in the late phase of tumor cell rejection in order to maintain protective immunity. However, despite the support of CD4(+) T helper cells, the tumor-specific CTL response is so weak that only at the site of tumor cell inoculation and not in the spleen or in the regional lymph nodes can TAg-specific CTL be detected.
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Affiliation(s)
- O Utermöhlen
- Heinrich-Pette-Institut für Experimentelle Virologie und Immunologie an der Universität Hamburg, D-20251 Hamburg, Germany.
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42
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Maile R, Wang B, Schooler W, Meyer A, Collins EJ, Frelinger JA. Antigen-specific modulation of an immune response by in vivo administration of soluble MHC class I tetramers. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 167:3708-14. [PMID: 11564786 DOI: 10.4049/jimmunol.167.7.3708] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Soluble MHC/peptide tetramers that can directly bind the TCR allow the direct visualization and quantitation of Ag-specific T cells in vitro and in vivo. We used HY-D(b) tetramers to assess the numbers of HY-reactive CD8+ T cells in HYTCR-transgenic mice and in naive, wild-type C57BL/6 (B6) mice. As expected, tetramer staining showed the majority of T cells were male-specific CD8+ T cells in female HY-TCR mice. Staining of B6 mice showed a small population of male-specific CD8+ T cells in female mice. The effect of administration of soluble MHC class I tetramers on CD8+ T cell activation in vivo was unknown. Injection of HY-D(b) tetramer in vivo effectively primed female mice for a more rapid proliferative response to both HY peptide and male splenocytes. Furthermore, wild-type B6 female mice injected with a single dose of HY-D(b) tetramer rejected B6 male skin grafts more rapidly than female littermates treated with irrelevant tetramer. In contrast, multiple doses of HY-D(b) tetramer did not further decrease graft survival. Rather, female B6 mice injected with multiple doses of HY-D(b) tetramer rejected male skin grafts more slowly than mice primed with a single injection of tetramer or irradiated male spleen cells, suggesting clonal exhaustion or anergy. Our data highlight the ability of soluble MHC tetramers to identify scarce alloreactive T cell populations and the use of such tetramers to directly modulate an Ag-specific T cell response in vivo.
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Affiliation(s)
- R Maile
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC 27599, USA.
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43
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Derby MA, Snyder JT, Tse R, Alexander-Miller MA, Berzofsky JA. An abrupt and concordant initiation of apoptosis: antigen-dependent death of CD8+ CTL. Eur J Immunol 2001; 31:2951-9. [PMID: 11592071 DOI: 10.1002/1521-4141(2001010)31:10<2951::aid-immu2951>3.0.co;2-q] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The ability of CD8+ cytotoxic T lymphocytes (CTL) to clear viral infections may be limited when high avidity CTL encounter supra-optimal antigen density on antigen-presenting cells (APC) and undergo antigen-dependent apoptosis of CTL (ADAC). Previously, we have shown ADAC in CD8+ populations to be Fas independent, TNF-alpha receptor 2 (TNFR2) mediated, caspase dependent, and accompanied by a decrease in Bcl-2. We now employ flow cytometry to follow ADAC within individual CD8+ cells to demonstrate that the intense TCR signal induced in high avidity CTL by supra-optimal antigen density results 8 - 16 h later in a caspase-independent TNFR2 down-modulation that is directly related to the stimulating APC antigen density and concludes in a rapid onset of apoptosis by 18 - 24 h. Individual CTL undergoing apoptosis exhibit a dramatic and concurrent: (1) positive staining with Annexin V and propidium iodide; (2) transformation to a smaller cell size characteristic of apoptosis; and (3) a nearly complete loss of Bcl-2, c-IAP1, and TRAF2. We conclude that the antigen-dependent apoptosis of CD8+ CTL occurs when a tandem TCR/TNFR2 signal initiates an abrupt and concordant onset of multiple apoptotic events.
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Affiliation(s)
- M A Derby
- Molecular Immunogenetics and Vaccine Research Section, Metabolism Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892-1578, USA
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44
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Diepolder HM, Gruener NH, Gerlach JT, Jung MC, Wierenga EA, Pape GR. Different levels of T-cell receptor triggering induce distinct functions in hepatitis B and hepatitis C virus-specific human CD4(+) T-cell clones. J Virol 2001; 75:7803-10. [PMID: 11483723 PMCID: PMC115022 DOI: 10.1128/jvi.75.17.7803-7810.2001] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
CD4(+) T cells play a major role in the host defense against viruses and intracellular microbes. During the natural course of such an infection, specific CD4(+) T cells are exposed to a wide range of antigen concentrations depending on the body compartment and the stage of disease. While epitope variants trigger only subsets of T-cell effector functions, the response of virus-specific CD4(+) T cells to various concentrations of the wild-type antigen has not been systematically studied. We stimulated hepatitis B virus core- and hepatitis C virus NS3-specific CD4(+) T-cell clones which had been isolated from patients with acute hepatitis during viral clearance with a wide range of specific antigen concentrations and determined the phenotypic changes and the induction of T-cell effector functions in relation to T-cell receptor internalization. A low antigen concentration induced the expression of T-cell activation markers and adhesion molecules in CD4(+) T-cell clones in the absence of cytokine secretion and proliferation. The expression of CD25, HLA-DR, CD69, and intercellular cell adhesion molecule 1 increased as soon as T-cell receptor internalization became detectable. A 30- to 100-fold-higher antigen concentration, corresponding to the internalization of 20 to 30% of T-cell receptor molecules, however, was required for the induction of proliferation as well as for gamma interferon and interleukin-4 secretion. These data indicate that virus-specific CD4(+) T cells can respond to specific antigen in a graded manner depending on the antigen concentration, which may have implications for a coordinate regulation of specific CD4(+) T-cell responses.
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Affiliation(s)
- H M Diepolder
- Institute for Immunology, University of Munich, 80336 Munich, Germany.
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45
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Bryl E, Gazda M, Foerster J, Witkowski JM. Age-related increase of frequency of a new, phenotypically distinct subpopulation of human peripheral blood T cells expressing lowered levels of CD4. Blood 2001; 98:1100-7. [PMID: 11493457 DOI: 10.1182/blood.v98.4.1100] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Aging is associated with modifications of T-cell phenotype and function, leading to impaired activation in response to both new and recall antigens. It is not known if T-cell activation results in elimination of a number of the CD4 molecules from the cell surface, as is the case with CD3/T-cell receptor complexes, or how aging influences the process. The T cells of young and elderly donors with reduced expression of CD4 were examined to see whether these cells exhibit other phenotypic features suggesting their active state. It was found that T lymphocytes expressing CD4 can be divided into 2 semidiscrete subpopulations: the major (CD4(+)) population, in which the level of expression of CD4 is constant and high, and a minor population (CD4(lo)), in which the expression of CD4 can be up to an order of magnitude lower than on the CD4(+) cells. The proportion of CD4(lo) cells is age dependent and highly variable in the apparently healthy human population, with the expression of CD4 ranging from around 10% of all peripheral blood lymphocytes in the young to more than 30% in the elderly. Lowered expression of CD4 is correlated with a reduced expression of CD3, as well as with a decreased amount of CD28 and CD95Fas. Activation of CD4(lo) cells is suggested by their expression of CD25 and increased amounts of HLA-DR. Phenotypic characteristics of the CD4(lo) T-cell subpopulation suggest that it might be formed by (perhaps chronically) activated, temporarily apoptosis-resistant cells, possibly accumulating in the elderly. (Blood. 2001;98:1100-1107)
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Affiliation(s)
- E Bryl
- Department of Immunology, Medical University of Gdansk, Poland
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46
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Affiliation(s)
- T Harder
- Basel Institute for Immunology, CH-4005 Basel, Switzerland
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47
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Lanzavecchia A, Sallusto F. Antigen decoding by T lymphocytes: from synapses to fate determination. Nat Immunol 2001; 2:487-92. [PMID: 11376334 DOI: 10.1038/88678] [Citation(s) in RCA: 180] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Naïve T lymphocytes sense foreign antigens by establishing contacts with dendritic cells (DCs). At the immunological synapse between the T cell and a DC, T cell receptors (TCRs) are serially engaged and triggered by specific ligands. The amount and duration of TCR triggering and the efficiency of signal amplification determine T cell commitment to proliferation and differentiation. The nature and availability of DCs bearing antigen and costimulatory molecules shape the T cell response, giving rise to distinct functional outputs such as effector and memory T cell generation or T cell tolerance.
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Affiliation(s)
- A Lanzavecchia
- Institute for Research in Biomedicine, Via Vincenzo Vela 6, CH-6500 Bellinzona, Switzerland.
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48
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Abstract
Modulation of T-cell receptor (TCR) signaling is essential for the regulation of T-cell responses to infectious agents. Recently, many laboratories have suggested that TCR triggering might be compartmentalized in plasma membrane microdomains called rafts. Results on the role of lipid rafts as signaling units in TCR triggering suggest that rafts might be used by T cells to fine-tune their immune responsiveness.
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Affiliation(s)
- A Viola
- Dept of Biomedical Sciences, University of Padova, via G. Colombo 3, 35121, Padova, Italy.
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49
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Derby MA, Wang J, Margulies DH, Berzofsky JA. Two intermediate-avidity cytotoxic T lymphocyte clones with a disparity between functional avidity and MHC tetramer staining. Int Immunol 2001; 13:817-24. [PMID: 11369710 DOI: 10.1093/intimm/13.6.817] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The efficacy of cytotoxic T lymphocytes (CTL) has been shown to be highly dependent upon their functional avidity (the sensitivity of their cellular response to MHC-peptide complexes). To examine this relationship, we employed target cell lysis as a quantitative measure and established a set of four CTL clones that exhibited a range of functional avidities spanning more than three orders of magnitude. Within this set, clones displayed a linear correlation between functional avidity and the TCR down-regulation that occurred in response to increasing antigen density. Staining intensity of MHC-peptide tetramer, however, correlated only with the very highest and very lowest avidity clones; the two intermediate-avidity clones showed an inverse relationship between tetramer staining and functional avidity. Compensation for differences in surface levels of TCR improved the correlation, but failed to fully account for this discrepancy. Comparison of TCR signals generated by stimulation of CTL with substrate-bound soluble MHC-peptide or antigen-presenting cells suggested that internal TCR signaling efficiency accounts for at least a portion of the observed functional avidity and suggests the need for caution in directly relating tetramer staining to avidity.
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Affiliation(s)
- M A Derby
- Molecular Immunogenetics and Vaccine Research Section, Metabolism Branch, National Cancer Institute, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 10 Center Drive, Bethesda, MD 20892, USA
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50
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van Bergen J, Kooy Y, Koning F. CD4-independent T cells impair TCR triggering of CD4-dependent T cells: a putative mechanism for T cell affinity maturation. Eur J Immunol 2001; 31:646-52. [PMID: 11180130 DOI: 10.1002/1521-4141(200102)31:2<646::aid-immu646>3.0.co;2-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In vivo, T cells expressing low-affinity TCR predominate in primary, but not in secondary responses, a process referred to as T cell affinity maturation. Using CD4 dependence as a measure of the avidity of the interaction between the allospecific TCR and the alloantigen, we show that a similar process occurs in mixed lymphocyte cultures in vitro. Moreover, in coculture experiments high-avidity (CD4-independent) T cell clones inhibited the TCR internalization of low-avidity (CD4-dependent) T cell clones, whereas low-avidity T cell clones had no such effect on high-avidity T cell clones. The extent of inhibition of TCR internalization was dependent on both the avidity of the competing clone and the number of competing cells. Thus, there was a cell dose- and avidity-dependent effect on TCR internalization, an early parameter in T cell activation. These results suggest that low- and high-avidity T cell clones compete for the availability of antigen-presenting cells and that this favors the selective outgrowth of high-avidity T cell clones.
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Affiliation(s)
- J van Bergen
- Leiden University Medical Center, Dept. of Immunohematology and Blood Transfusion, Leiden, The Netherlands.
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