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Viguier M, Pérals C, Poirier B, Battistella M, Aubin F, Bachelez H, Prétet JL, Gheit T, Tommasino M, Touzé A, Gougeon ML, Fazilleau N. Human papilloma virus-16-specific CD8+ T-cell expansions characterize different clinical forms of lichen planus and not lichen sclerosus et atrophicus. Exp Dermatol 2023; 32:859-868. [PMID: 36922453 DOI: 10.1111/exd.14788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 02/22/2023] [Accepted: 02/25/2023] [Indexed: 03/18/2023]
Abstract
Lichen planus (LP) is a cutaneomucosal chronic inflammatory disease characterized by a CD8+ cytotoxic T-lymphocytes (CTL) infiltrate. In erosive oral LP, we found HPV16-specific activated CTL in lesions, supporting a pathogenic contribution of HPV16. Here, we investigated whether a similar scenario occurs in other clinical forms of LP and in lichen sclerosus et atrophicus (LSA), another chronic disease also affecting the mucosa and/or the skin. Blood CTL from LP and LSA patients expressed significant higher levels of granzyme B, perforin and CD107a proteins than healthy donors. Expansions of TCRVß3+ CTL, with presence of TCR clonotypes identical to those previously detected in erosive oral LP, were found both in blood and mucosal/skin lesions of LP, and not of LSA patients. These expansions were enriched with HPV16-specific CD8+ T-cells as shown by their recognition of the E711-20 immunodominant epitope. In LSA patients, the peripheral repertoire of CTL was oligoclonal for TCRVß6+ CTL. Finally, although patients with LP and LSA have developed antibodies against HPV16 capsid L1, antibodies against HPV16 E6 were only observed in patients with LP. Overall, our data collectively suggest an involvement of HPV16-specific CTL in different clinical forms of LP, not only in erosive oral LP, while a different scenario operates in LSA.
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Affiliation(s)
- Manuelle Viguier
- Department of dermatology, Hôpital Robert-Debré, University of Reims Champagne-Ardenne (URCA), EA7509 IRMAIC, Reims, France
| | - Corine Pérals
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (Infinity), CNRS U5051, INSERM U1291, University Toulouse III, Toulouse, France
| | | | - Maxime Battistella
- Sorbonne Paris Cité, Service d'Anatomo-Pathologie, Hôpital Saint-Louis, Paris, France
| | - François Aubin
- Service de Dermatologie, Centre Hospitalo-Universitaire (CHU) de Besançon, Université de Franche Comté, Besançon, France
| | - Hervé Bachelez
- Laboratory of Genetics of Skin Diseases, Imagine Institute for Human Genetic Diseases, INSERM U1163, Université de Paris, Paris, France
- Department of Dermatology, APHP Hôpital Saint-Louis, Paris, France
| | - Jean-Luc Prétet
- Centre National de Référence Papillomavirus, Laboratoire de Biologie Cellulaire et Moléculaire, CHU de Besançon, Université Bourgogne Franche Comté, Besançon, France
| | | | - Massimo Tommasino
- IARC, Lyon, France
- IRCCS Istituto Tumori Giovanni Paolo II, Bari, Italy
| | | | | | - Nicolas Fazilleau
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (Infinity), CNRS U5051, INSERM U1291, University Toulouse III, Toulouse, France
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Maho-Vaillant M, Pérals C, Golinski M, Hébert V, Riou G, Boyer O, Viguier M, Calbo S, Fazilleau N, Joly P. 018 Evolution of autoreactive B and T cells in pemphigus patients with Rituximab or corticosteroida regimen treatment. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bernard I, Sacquin A, Kassem S, Benamar M, Colacios C, Gador M, Pérals C, Fazilleau N, Saoudi A. A Natural Variant of the Signaling Molecule Vav1 Enhances Susceptibility to Myasthenia Gravis and Influences the T Cell Receptor Repertoire. Front Immunol 2018; 9:2399. [PMID: 30410484 PMCID: PMC6210741 DOI: 10.3389/fimmu.2018.02399] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 09/27/2018] [Indexed: 01/01/2023] Open
Abstract
The guanine nucleotide exchange factor Vav1 is essential for transducing T cell receptor (TCR) signals and plays an important role in T cell development and activation. Previous genetic studies identified a natural variant of Vav1 characterized by the substitution of an arginine (R) residue by a tryptophane (W) at position 63 (Vav1R63W). This variant impacts Vav1 adaptor functions and controls susceptibility to T cell-mediated neuroinflammation. To assess the implication of this Vav1 variant on the susceptibility to antibody-mediated diseases, we used the animal model of myasthenia gravis, experimental autoimmune myasthenia gravis (EAMG). To this end, we generated a knock-in (KI) mouse model bearing a R to W substitution in the Vav1 gene (Vav1R63W) and immunized it with either torpedo acetylcholine receptor (tAChR) or the α146-162 immunodominant peptide. We observed that the Vav1R63W conferred increased susceptibility to EAMG, revealed by a higher AChR loss together with an increased production of effector cytokines (IFN-γ, IL-17A, GM-CSF) by antigen-specific CD4+ T cells, as well as an increased frequency of antigen-specific CD4+ T cells. This correlated with the emergence of a dominant antigen-specific T cell clone in KI mice that was not present in wild-type mice, suggesting an impact on thymic selection and/or a different clonal selection threshold following antigen encounter. Our results highlight the key role of Vav1 in the pathophysiology of EAMG and this was associated with an impact on the TCR repertoire of AChR reactive T lymphocytes.
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Affiliation(s)
- Isabelle Bernard
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, UPS, Inserm, CNRS, Toulouse, France
| | - Antoine Sacquin
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, UPS, Inserm, CNRS, Toulouse, France
| | - Sahar Kassem
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, UPS, Inserm, CNRS, Toulouse, France
| | - Mehdi Benamar
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, UPS, Inserm, CNRS, Toulouse, France
| | - Céline Colacios
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, UPS, Inserm, CNRS, Toulouse, France
| | - Mylène Gador
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, UPS, Inserm, CNRS, Toulouse, France
| | - Corine Pérals
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, UPS, Inserm, CNRS, Toulouse, France
| | - Nicolas Fazilleau
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, UPS, Inserm, CNRS, Toulouse, France
| | - Abdelhadi Saoudi
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, UPS, Inserm, CNRS, Toulouse, France
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Asrir A, Aloulou M, Gador M, Pérals C, Fazilleau N. Interconnected subsets of memory follicular helper T cells have different effector functions. Nat Commun 2017; 8:847. [PMID: 29018187 PMCID: PMC5635037 DOI: 10.1038/s41467-017-00843-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 07/31/2017] [Indexed: 01/12/2023] Open
Abstract
Follicular helper T cells regulate high-affinity antibody production. Memory follicular helper T cells can be local in draining lymphoid organs and circulate in the blood, but the underlying mechanisms of this subdivision are unresolved. Here we show that both memory follicular helper T subsets sustain B-cell responses after reactivation. Local cells promote more plasma cell differentiation, whereas circulating cells promote more secondary germinal centers. In parallel, local memory B cells are homogeneous and programmed to become plasma cells, whereas circulating memory B cells are able to rediversify. Local memory follicular helper T cells have higher affinity T-cell receptors, which correlates with expression of peptide MHC-II at the surface of local memory B cells only. Blocking T-cell receptor–peptide MHC-II interactions induces the release of local memory follicular helper T cells in the circulating compartment. Our studies show that memory follicular helper T localization is highly intertwined with memory B cells, a finding that has important implications for vaccine design. Tfh cells can differentiate into memory cells. Here the authors describe distinct functional and phenotypic profiles of these memory Tfh cells dependent on their anatomical localization to the lymphoid organs or to the circulation.
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Affiliation(s)
- Assia Asrir
- Centre de Physiopathologie de Toulouse Purpan, Toulouse, F-31300, France.,INSERM, U1043, BP 3028, 31024 Cedex 3, Toulouse, F-31300, France.,CNRS, UMR5282, Toulouse, F-31300, France.,Université Toulouse III Paul-Sabatier, Toulouse, F-31300, France
| | - Meryem Aloulou
- Centre de Physiopathologie de Toulouse Purpan, Toulouse, F-31300, France.,INSERM, U1043, BP 3028, 31024 Cedex 3, Toulouse, F-31300, France.,CNRS, UMR5282, Toulouse, F-31300, France.,Université Toulouse III Paul-Sabatier, Toulouse, F-31300, France
| | - Mylène Gador
- Centre de Physiopathologie de Toulouse Purpan, Toulouse, F-31300, France.,INSERM, U1043, BP 3028, 31024 Cedex 3, Toulouse, F-31300, France.,CNRS, UMR5282, Toulouse, F-31300, France.,Université Toulouse III Paul-Sabatier, Toulouse, F-31300, France
| | - Corine Pérals
- Centre de Physiopathologie de Toulouse Purpan, Toulouse, F-31300, France.,INSERM, U1043, BP 3028, 31024 Cedex 3, Toulouse, F-31300, France.,CNRS, UMR5282, Toulouse, F-31300, France.,Université Toulouse III Paul-Sabatier, Toulouse, F-31300, France
| | - Nicolas Fazilleau
- Centre de Physiopathologie de Toulouse Purpan, Toulouse, F-31300, France. .,INSERM, U1043, BP 3028, 31024 Cedex 3, Toulouse, F-31300, France. .,CNRS, UMR5282, Toulouse, F-31300, France. .,Université Toulouse III Paul-Sabatier, Toulouse, F-31300, France.
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Saleh OA, Pérals C, Barre FX, Allemand JF. Fast, DNA-sequence independent translocation by FtsK in a single-molecule experiment. EMBO J 2004; 23:2430-9. [PMID: 15167891 PMCID: PMC423284 DOI: 10.1038/sj.emboj.7600242] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2004] [Accepted: 04/27/2004] [Indexed: 11/09/2022] Open
Abstract
Escherichia coli FtsK is an essential cell division protein, which is thought to pump chromosomal DNA through the closing septum in an oriented manner by following DNA sequence polarity. Here, we perform single-molecule measurements of translocation by FtsK50C, a derivative that functions as a DNA translocase in vitro. FtsK50C translocation follows Michaelis-Menten kinetics, with a maximum speed of approximately 6.7 kbp/s. We present results on the effect of applied force on the speed, distance translocated, and the mean times during and between protein activity. Surprisingly, we observe that FtsK50C can spontaneously reverse its translocation direction on a fragment of E. coli chromosomal DNA, indicating that DNA sequence is not the sole determinant of translocation direction. We conclude that in vivo polarization of FtsK translocation could require the presence of cofactors; alternatively, we propose a model in which tension in the DNA directs FtsK translocation.
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Affiliation(s)
- Omar A Saleh
- Laboratoire de Physique Statistique et Département de Biologie, Ecole Normale Supérieure, Paris, France
| | - Corine Pérals
- Laboratoire de Microbiologie et de Génétique Moléculaire, Toulouse, France
| | - François-Xavier Barre
- Laboratoire de Microbiologie et de Génétique Moléculaire, Toulouse, France
- Laboratoire de Microbiologie et de Génétique Moléculaire, 118 Route de Narbonne, 31062 Toulouse, France. Tel.: +33 5 61 33 59 86; Fax: +33 5 61 33 58 86; E-mail:
| | - Jean-François Allemand
- Laboratoire de Physique Statistique et Département de Biologie, Ecole Normale Supérieure, Paris, France
- Laboratoire Pasteur, Département de Chimie, Ecole Normale Supérieure, Paris, France
- Laboratoire de Physique Statistique, Ecole Normale Supérieure, 24, Rue Lhomond, 75005 Paris, France. Tel.: +33 1 44 32 34 96; Fax: +33 1 44 32 34 33; E-mail:
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