Review
Microbiology
Manuel Ruiz-Pablos
Summary: Activated cytotoxic CD4 T cells are important in controlling EBV infection, but latency cells can evade immune response through gp42, leading to increased susceptibility to EBV-associated diseases in genetically predisposed individuals. Therefore, it is necessary to find treatments to eliminate cells with EBV latency.
Article
Oncology
Hiroko Nakajima, Jun Nakata, Kanako Imafuku, Hiromu Hayashibara, Kazuki Isokawa, Keiko Udaka, Fumihiro Fujiki, Soyoko Morimoto, Kana Hasegawa, Naoki Hosen, Yoshiko Hashii, Sumiyuki Nishida, Akihiro Tsuboi, Yoshihiro Oka, Yusuke Oji, Shinji Sogo, Haruo Sugiyama
Summary: This study identified three novel mouse Th epitope peptides that strongly induced and maintained WT1-specific CTLs, efficiently rejected WT1-expressing tumor cells, and showed that these CTLs played a central role in tumor rejection. The majority of WT1-specific CTLs induced by the co-immunization with WT1 CTL and the WT1-specific Th peptides were effector memory CD8(+) T cells, demonstrating their essential function in WT1-specific tumor immunity.
CANCER IMMUNOLOGY IMMUNOTHERAPY
(2021)
Article
Medicine, Research & Experimental
Spencer E. Brightman, Martin S. Naradikian, Rukman R. Thota, Angelica Becker, Leslie Montero, Milad Bahmanof, Ashmitaa Logandha Ramamoorthy Premlal, Jason A. Greenbaum, Bjoern Peters, Ezra E. W. Cohen, Aaron M. Miller, Stephen P. Schoenberger
Summary: CD4+ T cells recognize peptide antigens presented on MHC class II and play a critical role in antitumor immunity. However, the extent to which tumor-specific CD4+ T cells directly recognize solid cancers expressing MHC-II is unclear. In this study, we isolated and characterized T cell antigen receptors (TCRs) from naturally primed CD4+ T cells specific for HPV-16 E6 and the KRASG12V mutation, and found that the TCRs recognized antigen-loaded target cells expressing MHC-II or B cell antigen-presenting cells (APCs), but failed to recognize tumor cells expressing the source protein even after induction of surface MHC-II expression. These findings suggest that priming and recognition of oncoproteins are predominantly mediated by crosspresenting APCs rather than direct recognition of tumor cells induced to express MHC-II.
Review
Immunology
Anna Malyshkina, Alicia Brueggemann, Annette Paschen, Ulf Dittmer
Summary: CD4(+) T cells are important in immune responses against pathogens and cancer cells. They provide help to other immune cells and can directly kill infected or transformed cells. CD4(+) CTLs play a crucial role in controlling chronic viral infections and combating solid cancers.
FRONTIERS IN IMMUNOLOGY
(2023)
Review
Immunology
Jason Cheung, Beata Zahorowska, Michael Suranyi, Jeffrey K. W. Wong, Jason Diep, Stephen T. T. Spicer, Nirupama D. D. Verma, Suzanne J. Hodgkinson, Bruce M. M. Hall
Summary: The immune response to an allograft can activate lymphocytes that cause rejection. The activation of T regulatory cells can reduce allograft rejection and induce immune tolerance. Activated T regulatory cells can be distinguished by various markers. A more detailed characterization of these cells may help reduce non-specific immunosuppression.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Immunology
Brendan Reed, Frances Crawford, Ryan C. Hill, Niyun Jin, Janice White, S. Harsha Krovi, Philippa Marrack, Kirk Hansen, John W. Kappler
Summary: The identification of peptide epitopes presented by MHCII molecules that drive CD4 T cell autoimmunity, particularly in type 1 diabetes, has been a challenge. Recent insights suggest that important epitopes are actually chimeric epitopes pieced together from different peptide fragments, rather than directly processed from a protein source. This fusion process, known as transpeptidation, may occur during the catabolic turnover of pancreatic proteins, shedding light on how self-tolerance can be broken peripherally in autoimmune diseases like T1D.
JOURNAL OF EXPERIMENTAL MEDICINE
(2021)
Article
Immunology
Sabine Tischer-Zimmermann, Agnes Bonifacius, Maria Michela Santamorena, Philip Mausberg, Sven Stoll, Marius Doering, Ulrich Kalinke, Rainer Blasczyk, Britta Maecker-Kolhoff, Britta Eiz-Vesper
Summary: In immunocompromised patients, EBV infection or reactivation is associated with increased morbidity and mortality. The first-line treatment consists of reduction of immunosuppression and administration of rituximab. In addition, monitoring of T cells of high-risk patients is crucial for improving clinical outcome.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Cell Biology
Yuan Chen, Georgina H. Mason, D. Oliver Scourfield, Alexander Greenshields-Watson, Tracey A. Haigh, Andrew K. Sewell, Heather M. Long, Awen M. Gallimore, Pierre Rizkallah, Bruce J. MacLachlan, Andrew Godkin
Summary: CD4+ T cells recognize a diverse range of SARS-CoV-2 peptide epitopes, contributing to immune memory and limiting COVID-19 disease. The immunogenicity of these peptides does not correlate with their binding affinity to HLA-DR1. X-ray crystallographic structures of six epitopes bound to HLA-DR1 reveal the molecular impact of viral variant mutations on epitope presentation. Omicron variant escapes immune recognition through mutations in TCR-facing epitope positions and a single amino acid substitution that alters the peptide-HLA structure.
Article
Biotechnology & Applied Microbiology
Thamotharampillai Dileepan, Deepali Malhotra, Dmitri I. Kotov, Elizabeth M. Kolawole, Peter D. Krueger, Brian D. Evavold, Marc K. Jenkins
Summary: Engineered peptide:MHCII tetramers with enhanced CD4 binding outperform traditional tetramers in detecting antigen-specific CD4(+) T cells, allowing for identification of more T cells in immunized mice. These new reagents provide a deeper understanding of the T cell repertoire.
NATURE BIOTECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Cindy Hoeks, Marjan Vanheusden, Liesbet M. Peeters, Piet Stinissen, Bieke Broux, Niels Hellings
Summary: Research found that CD4 CTL are resistant to suppression by Tregs in vitro, but the conditioned medium of CD4 CTL can accentuate the suppressive phenotype of Tregs. The CD4 CTL conditioned medium also skews memory TH cells towards a TH17 phenotype, and when cell-cell contact is established between CD4 CTL and TH cells, the proliferation of TH cells is no longer increased and Treg-mediated suppression is restored.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Immunology
Michal P. Kuczma, Edyta A. Szurek, Anna Cebula, Vu L. Ngo, Maciej Pietrzak, Piotr Kraj, Timothy L. Denning, Leszek Ignatowicz
Summary: The study suggests that T cell anergy induction plays a crucial role in maintaining the balance of self-immunity. Disruption in peripherally-induced Tregs formation or exposure to selective self-peptides can result in an accumulation of anergic cells. Additionally, microbial antigens can induce anergy and promote the conversion of naive T cells to regulatory T cells.
MUCOSAL IMMUNOLOGY
(2021)
Review
Immunology
Cindy Hoeks, Gayel Duran, Niels Hellings, Bieke Broux
Summary: CD4 CTL, once considered an experimental artefact, are now recognized as a biologically relevant T cell subset with important functions in anti-viral, anti-tumor, and autoimmune responses. With the advancement of single cell analysis techniques, the study of CD4 CTL has been facilitated. This review summarizes the developmental path of CD4 CTL and presents markers for their detection and isolation. The subsets of CD4 CTL and their diverse functionalities are discussed.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Bently P. Doonan, Shereen Amria, Jennifer R. Bethard, Narendra L. Banik, Jessica D. Hathaway-Schrader, Azizul Haque
Summary: Prostate cancer is a significant health issue in western countries, and current therapies have limitations in treating advanced stages of the disease. Immunotherapy has emerged as a potential option for late-stage metastatic prostate cancer, but its effectiveness is still limited. This study demonstrates that inserting a lysosomal thiol reductase (GILT) into prostate cancer cells can enhance HLA class II antigen processing and increase CD4(+) T cell activation. This finding opens up new possibilities for designing cell therapy and vaccines against prostate cancer.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Immunology
Nyerhovwo Obarorakpor, Deep Patel, Reni Boyarov, Nansalmaa Amarsaikhan, Joseph Ray Cepeda, Doreen Eastes, Sylvia Robertson, Travis Johnson, Kai Yang, Qizhi Tang, Li Zhang
Summary: In spontaneous type 1 diabetes (T1D) non-obese diabetic (NOD) mice, the insulin B chain peptide 9-23 (B:9-23) can bind to the MHC class II molecule (IA(g7)) in register 3 (R3), creating a bimolecular IA(g7)/InsulinB:9-23 register 3 conformational epitope (InsB:R3). InsB:R3-specific chimeric antigen receptor (CAR) can guide CAR-expressing CD8 T cells to migrate to the islets and pancreatic lymph nodes. Regulatory T cells (Tregs) specific for an islet antigen can suppress autoimmune reactivity in islets and protect against T1D.
FRONTIERS IN IMMUNOLOGY
(2023)
Review
Immunology
Emma Bawden, Thomas Gebhardt
Summary: CD4+ T cells have diverse functions in cancer surveillance. Transcriptional analysis has identified several distinct differentiation states of CD4+ T cells in tumors, including cytotoxic and regulatory subsets associated with favorable or unfavorable outcomes. These states are determined by interactions of CD4+ T cells with different immune cells, stromal cells, and cancer cells, and can be shaped dynamically. This article discusses the cellular networks in the tumor microenvironment that either support or inhibit CD4+ T-cell cancer surveillance, as well as recent studies on cancer-specific CD4+ T cells in human tumors using single-cell RNA sequencing.
CURRENT OPINION IN IMMUNOLOGY
(2023)
Review
Physiology
Mallorie Depond, Benoit Henry, Pierre Buffet, Papa Alioune Ndour
FRONTIERS IN PHYSIOLOGY
(2020)
Article
Medicine, General & Internal
Alexandre Quilbe, Olivier Morales, Martha Baydoun, Abhishek Kumar, Rami Mustapha, Takashi Murakami, Bertrand Leroux, Clementine de Schutter, Elise Thecua, Laurine Ziane, Ludovic Colombeau, Celine Frochot, Serge Mordon, Nadira Delhem
JOURNAL OF CLINICAL MEDICINE
(2020)
Review
Parasitology
Benoit Henry, Camille Roussel, Mario Carucci, Valentine Brousse, Papa Alioune Ndour, Pierre Buffet
TRENDS IN PARASITOLOGY
(2020)
Article
Medicine, General & Internal
Martha Baydoun, Olivier Morales, Celine Frochot, Colombeau Ludovic, Bertrand Leroux, Elise Thecua, Laurine Ziane, Anne Grabarz, Abhishek Kumar, Clementine de Schutter, Pierre Collinet, Henri Azais, Serge Mordon, Nadira Delhem
JOURNAL OF CLINICAL MEDICINE
(2020)
Review
Biochemistry & Molecular Biology
Sarah Renaud, Anthony Lefebvre, Serge Mordon, Olivier Morales, Nadira Delhem
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2020)
Article
Biochemistry & Molecular Biology
Clara Milhem, Olivier Morales, Celine Ingelaere, David Pasquier, Serge Mordon, Laurent Mortier, Xavier Mirabel, Nadira Delhem
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2020)
Article
Hematology
Mickael Marin, Camille Roussel, Michael Dussiot, Papa A. Ndour, Olivier Hermine, Yves Colin, Alan Gray, Matt Landrigan, Caroline Le Van Kim, Pierre A. Buffet, Pascal Amireault
Summary: Rejuvenation of red blood cells restores intracellular ATP levels, reduces phosphatidylserine (PS) exposure, and decreases the proportion of morphologically altered red blood cells accumulated during storage. Rejuvenation also improves the filterability of red blood cells and prevents their adhesion to endothelial cells.
Article
Hematology
Camille Roussel, Alexandre Morel, Michael Dussiott, Mickael Marin, Martin Colard, Aurelie Fricot-Monsinjon, Anais Martinez, Charlotte Chambrion, Benoit Henry, Madeleine Casimir, Geoffroy Volle, Mallorie Depond, Safi Dokmak, Francois Paye, Alain Sauvanet, Caroline Le van Kim, Yves Colin, Sonia Georgeault, Philippe Roingeard, Steven L. Spitalnik, Papa Alioune Ndour, Olivier Hermine, Eldad A. Hod, Pierre A. Buffet, Pascal Amireault
Summary: This study found that a high proportion of SMEs in RBC concentrates from healthy volunteers correlated with poor transfusion recovery. When perfused through a human spleen, 15% and 61% of long-stored RBCs and SMEs were cleared within 70 minutes, respectively. High initial proportion of SMEs also correlated with high retention of RBCs by perfused human spleen.
Article
Immunology
Camille Roussel, Papa Alioune Ndour, Eric Kendjo, Sebastien Larreche, Aida Taieb, Benoit Henry, Benedicte Lebrun-Vignes, Charlotte Chambrion, Nicolas Argy, Sandrine Houze, Oussama Mouri, David Courtin, Adela Angoulvant, Herve Delacour, Frederick Gay, Jean-Yves Siriez, Martin Danis, Fabrice Bruneel, Olivier Bouchaud, Eric Caumes, Renaud Piarroux, Marc Thellier, Stephane Jaureguiberry, Pierre Buffet
Summary: This study investigated the use of intravenous artesunate in 1391 patients with severe imported malaria in France from 2011 to 2017, finding that artesunate was widely used, effective, but with a high incidence of adverse events such as anemia and cardiac events. Further exploration should focus on outcomes during pregnancy and rare but potentially severe cardiac adverse events in the context of imported malaria.
CLINICAL INFECTIOUS DISEASES
(2021)
Letter
Medicine, General & Internal
Steven Kho, Labibah Qotrunnada, Leo Leonardo, Benediktus Andries, Putu A. I. Wardani, Aurelie Fricot, Benoit Henry, David Hardy, Nur I. Margyaningsih, Dwi Apriyanti, Agatha M. Puspitasari, Pak Prayoga, Leily Trianty, Enny Kenangalem, Fabrice Chretien, Innocent Safeukui, Hernando A. del Portillo, Carmen Fernandez-Becerra, Elamaran Meibalan, Matthias Marti, Ric N. Price, Tonia Woodberry, Papa A. Ndour, Bruce M. Russell, Tsin W. Yeo, Gabriela Minigo, Rintis Noviyanti, Jeanne R. Poespoprodjo, Nurjati C. Siregar, Pierre A. Buffet, Nicholas M. Anstey
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Medicine, General & Internal
Steven Kho, Labibah Qotrunnada, Leo Leonardo, Benediktus Andries, Putu A. I. Wardani, Aurelie Fricot, Benoit Henry, David Hardy, Nur I. Margyaningsih, Dwi Apriyanti, Agatha M. Puspitasari, Pak Prayoga, Leily Trianty, Enny Kenangalem, Fabrice Chretien, Valentine Brousse, Innocent Safeukui, Hernando A. del Portillo, Carmen Fernandez-Becerra, Elamaran Meibalan, Matthias Marti, Ric N. Price, Tonia Woodberry, Papa A. Ndour, Bruce M. Russell, Tsin W. Yeo, Gabriela Minigo, Rintis Noviyanti, Jeanne R. Poespoprodjo, Nurjati C. Siregar, Pierre A. Buffet, Nicholas M. Anstey
Summary: A study in malaria-endemic Papua and non-endemic France found high concentrations of immature reticulocytes in the spleens of individuals infected with Plasmodium vivax, suggesting a niche for parasite survival. Additionally, P. vivax-infected erythrocytes of all stages accumulated in the spleen, indicating a potential cryptic endosplenic lifecycle. These findings provide insights into P. vivax-specific adaptations for survival and replication.
Review
Oncology
Abhishek Kumar, Olivier Morales, Serge Mordon, Nadira Delhem, Emmanuel Boleslawski
Summary: Hepatocellular Carcinoma (HCC) is a major cause of cancer-related mortality worldwide, with limited treatment options. This review explores the mechanism and benefits of Photodynamic Therapy (PDT) as an anti-cancer therapy, focusing on its application in HCC treatment. The review also discusses the immune response generated by PDT and its potential role in HCC treatment, proposing a combination approach with existing therapies.
Article
Physiology
Charlotte Chambrion, Mallorie Depond, Lucia Angella, Oussama Mouri, Eric Kendjo, Aurelie Fricot-Monsinjon, Camille Roussel, Sylvestre Biligui, Ilhame Tantaoui, Aida Taieb, Nicolas Argy, Sandrine Houze, Renaud Piarroux, Jean-Yves Siriez, Stephane Jaureguiberry, Sebastien Larreche, Marc Thellier, Nicolas Cenac, Pierre Buffet, Papa Alioune Ndour
Summary: In acute malaria, the loss of erythrocytes primarily occurs after therapy, leading to anemia. The mechanisms behind this post-treatment anemia are still unknown. This study investigated the changes in RBC subpopulations during severe malaria treated with artemisinin derivatives. The findings showed decreased deformability of RBC, and the loss of RBC was mainly attributed to the elimination of uninfected RBC.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Medicine, General & Internal
Benoit Henry, Geoffroy Volle, Hilaire Akpovi, Laure Gineau, Camille Roussel, Papa Alioune Ndour, Felicien Tossou, Felipe Suarez, Friso Palstra, Aurelie Fricot, Charlotte Chambrion, Julien Solinc, Julie Nguyen, Mathilde Gare, Florentin Aussenac, Charles-Henry Cottart, Christine Keyser, Rafiou Adamou, Magali Tichit, David Hardy, Nadine Fievet, Jerome Clain, Andre Garcia, David Courtin, Olivier Hermine, Audrey Sabbagh, Pierre Buffet
Summary: The Fulani ethnic group has a higher deformability of circulating erythrocytes compared to non-Fulani, indicating enhanced clearance of rigid erythrocytes by the spleen. This phenotype is observed in individuals with markers of Plasmodium falciparum infection. The heritability of this trait is high with a strong multigenic component, and genes expressed in the spleen may be involved in the splenic clearance of erythrocytes.
Article
Biochemistry & Molecular Biology
Abhishek Kumar, Florian Pecquenard, Martha Baydoun, Alexandre Quilbe, Olivier Morales, Bertrand Leroux, Lynda Aoudjehane, Filomena Conti, Emmanuel Boleslawski, Nadira Delhem
Summary: Photodynamic therapy (PDT) is a two-stage treatment using a nontoxic dye called photosensitizer to induce cytotoxicity. This study investigated the impact of PDT on hepatocellular carcinoma (HCC) using 5-aminolevulinic acid (5-ALA) as the photosensitizer pro-drug. The optimal 5-ALA PDT dose was determined on HCC cell lines, and its efficacy was tested on patient-derived hepatocytes, myofibroblasts, and in vivo mouse models. The results showed a dose-dependent decrease in viability of HCC cells treated with 5-ALA PDT, and an induction of immune cell clonal expansion. This study suggests that 5-ALA PDT may be an effective anti-HCC therapy.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)