scholarly journals Identification of CDCA1-derived long peptides bearing both CD4+and CD8+T-cell epitopes: CDCA1-specific CD4+T-cell immunity in cancer patients

2013 ◽  
Vol 134 (2) ◽  
pp. 352-366 ◽  
Author(s):  
Yusuke Tomita ◽  
Akira Yuno ◽  
Hirotake Tsukamoto ◽  
Satoru Senju ◽  
Sachiko Yoshimura ◽  
...  
Keyword(s):  
T Cell ◽  
Cancer Patients ◽  
Cd8 T Cell ◽  
T Cell Immunity ◽  
Cd4 T Cell ◽  
T Cell Epitopes ◽  
Cell Immunity

scholarly journals Identification of immunogenic LY6K long peptide encompassing both CD4+and CD8+T-cell epitopes and eliciting CD4+T-cell immunity in patients with malignant disease

2014 ◽  
Vol 3 (3) ◽  
pp. e28100 ◽  
Author(s):  
Yusuke Tomita ◽  
Akira Yuno ◽  
Hirotake Tsukamoto ◽  
Satoru Senju ◽  
Yasuhiro Kuroda ◽  
...  
Keyword(s):  
T Cell ◽  
Malignant Disease ◽  
Cd8 T Cell ◽  
T Cell Immunity ◽  
Cd4 T Cell ◽  
T Cell Epitopes ◽  
Cell Immunity

scholarly journals Identification of Promiscuous KIF20A Long Peptides Bearing Both CD4+ and CD8+ T-cell Epitopes: KIF20A-Specific CD4+ T-cell Immunity in Patients with Malignant Tumor

2013 ◽  
Vol 19 (16) ◽  
pp. 4508-4520 ◽  
Author(s):  
Yusuke Tomita ◽  
Akira Yuno ◽  
Hirotake Tsukamoto ◽  
Satoru Senju ◽  
Yasuhiro Kuroda ◽  
...  
Keyword(s):  
T Cell ◽  
Malignant Tumor ◽  
Cd8 T Cell ◽  
T Cell Immunity ◽  
Cd4 T Cell ◽  
T Cell Epitopes ◽  
Cell Immunity

scholarly journals CD4+ T-cell help amplifies innate signals for primary CD8+ T-cell immunity

2016 ◽  
Vol 272 (1) ◽  
pp. 52-64 ◽  
Author(s):  
Sammy Bedoui ◽  
William R. Heath ◽  
Scott N. Mueller
Keyword(s):  
T Cell ◽  
Cd8 T Cell ◽  
T Cell Immunity ◽  
Cd4 T Cell ◽  
Cd4 T Cell Help ◽  
Cell Immunity ◽  
T Cell Help

scholarly journals SARS-CoV-2 genome-wide mapping of CD8 T cell recognition reveals strong immunodominance and substantial CD8 T cell activation in COVID-19 patients

2020 ◽  
Author(s):  
Sunil Kumar Saini ◽  
Ditte Stampe Hersby ◽  
Tripti Tamhane ◽  
Helle Rus Povlsen ◽  
Susana Patricia Amaya Hernandez ◽  
...  
Keyword(s):  
T Cell ◽  
T Cell Activation ◽  
Cell Activation ◽  
Severe Disease ◽  
Protein A ◽  
Cd8 T Cell ◽  
T Cell Immunity ◽  
T Cell Epitopes ◽  
High Exposure ◽  
Cell Immunity

SummaryTo understand the CD8+ T cell immunity related to viral protection and disease severity in COVID-19, we evaluated the complete SARS-CoV-2 genome (3141 MHC-I binding peptides) to identify immunogenic T cell epitopes, and determine the level of CD8+ T cell involvement using DNA-barcoded peptide-major histocompatibility complex (pMHC) multimers. COVID-19 patients showed strong T cell responses, with up to 25% of all CD8+ lymphocytes specific to SARS-CoV-2-derived immunodominant epitopes, derived from ORF1 (open reading frame 1), ORF3, and Nucleocapsid (N) protein. A strong signature of T cell activation was observed in COVID-19 patients, while no T cell activation was seen in the ‘non-exposed’ and ‘high exposure risk’ healthy donors. Interestingly, patients with severe disease displayed the largest T cell populations with a strong activation profile. These results will have important implications for understanding the T cell immunity to SARS-CoV-2 infection, and how T cell immunity might influence disease development.

Abstract 2834: Cancer testis antigens-specific CD4+T-cell immunity augmented by CTL-epitopes vaccination in cancer patients.

2013 ◽  
Author(s):  
Yusuke Tomita ◽  
Akira Yuno ◽  
Yoshihiro Yoshitake ◽  
Hirotake Tsukamoto ◽  
Atsushi Irie ◽  
...  
Keyword(s):  
T Cell ◽  
Cancer Patients ◽  
T Cell Immunity ◽  
Cd4 T Cell ◽  
Ctl Epitopes ◽  
Cancer Testis Antigens ◽  
Cell Immunity ◽  
Cancer Testis

scholarly journals Combined Photosensitization and Vaccination Enable CD8 T-Cell Immunity and Tumor Suppression Independent of CD4 T-Cell Help

2019 ◽  
Vol 10 ◽  
Author(s):  
Eleni Maria Varypataki ◽  
Fabio Hasler ◽  
Ying Waeckerle-Men ◽  
Sarah Vogel-Kindgen ◽  
Anders Høgset ◽  
...  
Keyword(s):  
T Cell ◽  
Tumor Suppression ◽  
Cd8 T Cell ◽  
T Cell Immunity ◽  
Cd4 T Cell ◽  
Cd4 T Cell Help ◽  
Cell Immunity ◽  
T Cell Help

scholarly journals Immunodominant T-cell epitopes from the SARS-CoV-2 spike antigen reveal robust pre-existing T-cell immunity in unexposed individuals

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Swapnil Mahajan ◽  
Vasumathi Kode ◽  
Keshav Bhojak ◽  
Coral Karunakaran ◽  
Kayla Lee ◽  
...  
Keyword(s):  
T Cell ◽  
T Cell Activation ◽  
Cell Activation ◽  
Cd8 T Cell ◽  
T Cell Immunity ◽  
T Cell Epitopes ◽  
Cell Reactivity ◽  
Cell Immunity ◽  
T Cell Reactivity ◽  
Shared Epitopes

AbstractThe COVID-19 pandemic has revealed a range of disease phenotypes in infected patients with asymptomatic, mild, or severe clinical outcomes, but the mechanisms that determine such variable outcomes remain unresolved. In this study, we identified immunodominant CD8 T-cell epitopes in the spike antigen using a novel TCR-binding algorithm. The predicted epitopes induced robust T-cell activation in unexposed donors demonstrating pre-existing CD4 and CD8 T-cell immunity to SARS-CoV-2 antigen. The T-cell reactivity to the predicted epitopes was higher than the Spike-S1 and S2 peptide pools in the unexposed donors. A key finding of our study is that pre-existing T-cell immunity to SARS-CoV-2 is contributed by TCRs that recognize common viral antigens such as Influenza and CMV, even though the viral epitopes lack sequence identity to the SARS-CoV-2 epitopes. This finding is in contrast to multiple published studies in which pre-existing T-cell immunity is suggested to arise from shared epitopes between SARS-CoV-2 and other common cold-causing coronaviruses. However, our findings suggest that SARS-CoV-2 reactive T-cells are likely to be present in many individuals because of prior exposure to flu and CMV viruses.

scholarly journals Immunodominant T-cell epitopes from the SARS-CoV-2 spike antigen reveal robust pre-existing T-cell immunity in unexposed individuals

2020 ◽  
Author(s):  
Swapnil Mahajan ◽  
Vasumathi Kode ◽  
Keshav Bhojak ◽  
Coral M. Magdalene ◽  
Kayla Lee ◽  
...  
Keyword(s):  
T Cell ◽  
T Cell Activation ◽  
Common Cold ◽  
Cell Activation ◽  
Severe Disease ◽  
Cd8 T Cell ◽  
T Cell Immunity ◽  
T Cell Epitopes ◽  
Cell Reactivity ◽  
Cell Immunity

ABSTRACTThe COVID-19 pandemic has revealed a range of disease phenotypes in infected patients with asymptomatic, mild or severe clinical outcomes, but the mechanisms that determine such variable outcomes remain unresolved. In this study, we identified immunodominant CD8 T-cell epitopes in the RBD and the non-RBD domain of the spike antigen using a novel TCR-binding algorithm. A selected pool of 11 predicted epitopes induced robust T-cell activation in unexposed donors demonstrating pre-existing CD4 and CD8 T-cell immunity to SARS-CoV-2 antigen. The T-cell reactivity to the predicted epitopes was higher than the Spike-S1 and S2 peptide pools containing 157 and 158 peptides both in unexposed donors and in convalescent patients suggesting that strong T-cell epitopes are likely to be missed when larger peptide pools are used in assays. A key finding of our study is that pre-existing T-cell immunity to SARS-CoV-2 is contributed by TCRs that recognize common viral antigens such as Influenza and CMV, even though the viral epitopes lack sequence identity to the SARS-CoV-2 epitopes. This finding is in contrast to multiple published studies in which pre-existing T-cell immunity is suggested to arise from shared epitopes between SARS-CoV-2 and other common cold-causing coronaviruses. Whether the presence of pre-existing T-cell immunity provides protection against COVID-19 or contributes to severe disease phenotype remains to be determined in a larger cohort. However, our findings raise the expectation that a significant majority of the global population is likely to have SARS-CoV-2 reactive T-cells because of prior exposure to flu and CMV viruses, in addition to common cold-causing coronaviruses.

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