S
Sydney I. Ramirez
Researcher at La Jolla Institute for Allergy and Immunology
Publications - 26
Citations - 10791
Sydney I. Ramirez is an academic researcher from La Jolla Institute for Allergy and Immunology. The author has contributed to research in topics: Medicine & T cell. The author has an hindex of 13, co-authored 21 publications receiving 5545 citations. Previous affiliations of Sydney I. Ramirez include University of California, San Diego & University of Texas Medical Branch.
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Journal ArticleDOI
Targets of T Cell Responses to SARS-CoV-2 Coronavirus in Humans with COVID-19 Disease and Unexposed Individuals.
Alba Grifoni,Daniela Weiskopf,Sydney I. Ramirez,Sydney I. Ramirez,Jose Mateus,Jennifer M. Dan,Jennifer M. Dan,Carolyn Rydyznski Moderbacher,Stephen A. Rawlings,Aaron Sutherland,Lakshmanane Premkumar,Ramesh Jadi,Daniel Marrama,Aravinda M. de Silva,April Frazier,Aaron F. Carlin,Jason A. Greenbaum,Bjoern Peters,Bjoern Peters,Florian Krammer,Davey M. Smith,Shane Crotty,Shane Crotty,Alessandro Sette,Alessandro Sette +24 more
TL;DR: Using HLA class I and II predicted peptide ‘megapools’, circulating SARS-CoV-2−specific CD8+ and CD4+ T cells were identified in ∼70% and 100% of COVID-19 convalescent patients, respectively, suggesting cross-reactive T cell recognition between circulating ‘common cold’ coronaviruses and SARS.
Journal ArticleDOI
Immunological memory to SARS-CoV-2 assessed for up to 8 months after infection.
Jennifer M. Dan,Jennifer M. Dan,Jose Mateus,Yu Kato,Kathryn M. Hastie,Esther Dawen Yu,Caterina E. Faliti,Alba Grifoni,Sydney I. Ramirez,Sydney I. Ramirez,Sonya Haupt,April Frazier,Catherine Nakao,Vamseedhar Rayaprolu,Stephen A. Rawlings,Bjoern Peters,Bjoern Peters,Florian Krammer,Viviana Simon,Erica Ollmann Saphire,Erica Ollmann Saphire,Davey M. Smith,Daniela Weiskopf,Alessandro Sette,Alessandro Sette,Shane Crotty,Shane Crotty +26 more
TL;DR: This article analyzed multiple compartments of circulating immune memory to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in 254 samples from 188 COVID-19 cases, including 43 samples at ≥ 6 months after infection.
Journal ArticleDOI
Antigen-Specific Adaptive Immunity to SARS-CoV-2 in Acute COVID-19 and Associations with Age and Disease Severity.
Carolyn Rydyznski Moderbacher,Sydney I. Ramirez,Sydney I. Ramirez,Jennifer M. Dan,Jennifer M. Dan,Alba Grifoni,Kathryn M. Hastie,Daniela Weiskopf,Simon Bélanger,Robert K. Abbott,Christina K. Kim,Jinyong Choi,Yu Kato,Eleanor G. Crotty,Cheryl Kim,Stephen A. Rawlings,Jose Mateus,Longping V. Tse,April Frazier,Ralph S. Baric,Bjoern Peters,Jason A. Greenbaum,Erica Ollmann Saphire,Erica Ollmann Saphire,Davey M. Smith,Alessandro Sette,Alessandro Sette,Shane Crotty,Shane Crotty +28 more
TL;DR: A combined examination of all three branches of adaptive immunity at the level of SARS-CoV-2-specific CD4+ and CD8+ T cell and neutralizing antibody responses in acute and convalescent subjects suggested roles for both CD4 plus T cells in protective immunity in COVID-19.
Journal ArticleDOI
Isolation of potent SARS-CoV-2 neutralizing antibodies and protection from disease in a small animal model.
Thomas F. Rogers,Thomas F. Rogers,Fangzhu Zhao,Deli Huang,Nathan Beutler,Alison Burns,Wan-ting He,Oliver Limbo,Oliver Limbo,Chloe Smith,Ge Song,Jordan L. Woehl,Jordan L. Woehl,Linlin Yang,Robert K. Abbott,Robert K. Abbott,Sean Callaghan,Elijah Garcia,Jonathan Hurtado,Mara Parren,Linghang Peng,Sydney I. Ramirez,James Ricketts,Michael J. Ricciardi,Stephen A. Rawlings,Nicholas C. Wu,Meng Yuan,Davey M. Smith,David Nemazee,John R. Teijaro,James E. Voss,Ian A. Wilson,Raiees Andrabi,Bryan Briney,Elise Landais,Devin Sok,Joseph G. Jardine,Joseph G. Jardine,Dennis R. Burton +38 more
TL;DR: A role for potent neutralizing antibodies (nAbs) in prophylaxis, and potentially therapy, of COVID-19 is suggested, as indicated by maintained weight and low lung viral titers in treated animals, and the passive transfer of a nAb provides protection against disease in high-dose SARS-CoV-2 challenge in Syrian hamsters.
Journal ArticleDOI
Selective and cross-reactive SARS-CoV-2 T cell epitopes in unexposed humans.
Jose Mateus,Alba Grifoni,Alison Tarke,John Sidney,Sydney I. Ramirez,Sydney I. Ramirez,Jennifer M. Dan,Jennifer M. Dan,Zoe C Burger,Stephen A. Rawlings,Davey M. Smith,Elizabeth J. Phillips,Simon Mallal,Marshall Lammers,Paul Rubiro,Lorenzo Quiambao,Aaron Sutherland,Esther Dawen Yu,Ricardo da Silva Antunes,Jason A. Greenbaum,April Frazier,Alena J. Markmann,Lakshmanane Premkumar,Aravinda M. de Silva,Bjoern Peters,Bjoern Peters,Shane Crotty,Shane Crotty,Alessandro Sette,Alessandro Sette,Daniela Weiskopf +30 more
TL;DR: A range of preexisting memory CD4+ T cells that are cross-reactive with comparable affinity to SARS-CoV-2 and the common cold coronaviruses human coronavirus (HCoV)-OC43, H coV-229E, H CoV-NL63, and HCov-HKU1 are demonstrated.