Antibody to Langerin/CD207 localizes large numbers of CD8alpha+ dendritic cells to the marginal zone of mouse spleen.
Authors:Idoyaga J, Suda N, Suda K, Park CG, Steinman RM,
Journal:Proc Natl Acad Sci U S A
PubMed ID:19168629
Dendritic cells (DCs) are strategically positioned to take up antigens and initiate adaptive immunity. One DC subset expresses CD8alphaalpha in mice and is specialized to capture dying cells and process antigens for MHC class I ... More
Rapid up-regulation and granule-independent transport of perforin to the immunological synapse define a novel mechanism of antigen-specific CD8+ T cell cytotoxic activity.
CTL are endowed with the ability to eliminate pathogens through perforin-mediated cytotoxic activity. The mechanism for perforin-mediated Ag-specific killing has been solely attributed to cytotoxic granule exocytosis from activated CD8(+) T cells. In this study, we redefine this mechanism, demonstrating that virus-specific CD8(+) T cells rapidly up-regulate perforin in response ... More
?d T Cells Recognize a Microbial Encoded B Cell Antigen to Initiate a Rapid Antigen-Specific Interleukin-17 Response.
?d T cells contribute uniquely to immune competence. Nevertheless, how they function remains an enigma. It is unclear what most ?d T cells recognize, what is required for them to mount an immune response, and how the ?d T cell response is integrated into host immune defense. Here, we report that a noted ... More
The microbial mimic poly IC induces durable and protective CD4+ T cell immunity together with a dendritic cell targeted vaccine.
Authors:Trumpfheller C, Caskey M, Nchinda G, Longhi MP, Mizenina O, Huang Y, Schlesinger SJ, Colonna M, Steinman RM,
Journal:Proc Natl Acad Sci U S A
PubMed ID:18256187
CD4(+) Th1 type immunity is implicated in resistance to global infectious diseases. To improve the efficacy of T cell immunity induced by human immunodeficiency virus (HIV) vaccines, we are developing a protein-based approach that directly harnesses the function of dendritic cells (DCs) in intact lymphoid tissues. Vaccine proteins are selectively ... More
Increased mucosal CD4+ T cell activation following vaccination with an adenoviral vector in rhesus macaques.
Authors:Bukh I, Calcedo R, Roy S, Carnathan DG, Grant R, Qin Q, Boyd S, Ratcliffe SJ, Veeder CL, Bellamy SL, Betts MR, Wilson JM,
Journal:
PubMed ID:24829340
The possibility that vaccination with adenoviral (AdV) vectors increased mucosal T-cell activation remains a central hypothesis to explain the potential enhancement of HIV acquisition within the Step trial. Modeling this within rhesus macaques is complicated because human adenoviruses, including adenovirus type 5 (HAdV-5), are not endogenous to macaques. Here, we ... More