期刊
JOURNAL OF CLINICAL INVESTIGATION
卷 131, 期 23, 页码 -出版社
AMER SOC CLINICAL INVESTIGATION INC
DOI: 10.1172/JCI150823
关键词
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资金
- SCHARP Statistical Center
- National Institute of Allergy and Infectious Diseases (NIAID) US Public Health Service [UM1 AI00645, UM1 AI144371, UM1 AI068614, UM1 AI068635, UM1 AI068618, UM1 AI069412, UM1 AI069481, MR/K012037]
- Medical Research Council
- Wellcome Trust Senior Investigator Award [100326/Z/12/Z]
- Wellcome Trust [100326/Z/12/Z] Funding Source: Wellcome Trust
A study found that preexisting memory CD4(+) T cells could shape the early immune response to vaccination with a previously unencountered HIV-1 antigen in HIV-1-seronegative volunteers who received an HIV-1 vaccine.
Naive and memory CD4(+) T cells reactive with human immunodeficiency virus type 1 (HIV-1) are detectable in unexposed, unimmunized individuals. The contribution of preexisting CD4(+) T cells to a primary immune response was investigated in 20 HIV-1-seronegative volunteers vaccinated with an HIV-1 envelope (Env) plasmid DNA prime and recombinant modified vaccinia virus Ankara (MVA) boost in the HVTN 106 vaccine trial (clinicaltrials.gov NCT02296541). Prevaccination naive or memory CD4(+) T cell responses directed against peptide epitopes in Env were identified in 14 individuals. After priming with DNA, 40% (8/20) of the elicited responses matched epitopes detected in the corresponding preimmunization memory repertoires, and clonotypes were shared before and after vaccination in 2 representative volunteers. In contrast, there were no shared epitope specificities between the preimmunization memory compartment and responses detected after boosting with recombinant MVA expressing a heterologous Env. Preexisting memory CD4(+) T cells therefore shape the early immune response to vaccination with a previously unencountered HIV-1 antigen.
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