Mature CD8+ T lymphocyte response to viral infection during fetal life
AUTOR(ES)
Marchant, Arnaud
FONTE
American Society for Clinical Investigation
RESUMO
Immunization of newborns against viral infections may be hampered by ineffective CD8+ T cell responses. To characterize the function of CD8+ T lymphocytes in early life, we studied newborns with congenital human cytomegalovirus (HCMV) infection. We demonstrate that HCMV infection in utero leads to the expansion and the differentiation of mature HCMV-specific CD8+ T cells, which have similar characteristics to those detected in adults. High frequencies of HCMV-specific CD8+ T cells were detected by ex vivo tetramer staining as early as after 28 weeks of gestation. During the acute phase of infection, these cells had an early differentiation phenotype (CD28–CD27+CD45RO+, perforinlow), and they acquired a late differentiation phenotype (CD28–CD27-CD45RA+, perforinhigh) during the course of the infection. The differentiated cells showed potent perforin-dependent cytolytic activity and produced antiviral cytokines. The finding of a mature and functional CD8+ T cell response to HCMV suggests that the machinery required to prime such responses is in place during fetal life and could be used to immunize newborns against viral pathogens.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=156108Documentos Relacionados
- CD4+ T cells are required to sustain CD8+ cytotoxic T-cell responses during chronic viral infection.
- CD8+ T Cells Mediate Viral Clearance and Disease Pathogenesis during Acute Hepatitis B Virus Infection†
- Differential Tissue-Specific Regulation of Antiviral CD8+ T-Cell Immune Responses during Chronic Viral Infection
- Treatment with Anti-LFA-1 Delays the CD8+ Cytotoxic-T-Lymphocyte Response and Viral Clearance in Mice with Primary Respiratory Syncytial Virus Infection
- Bystander Activation of CD8+ T Lymphocytes during Experimental Mycobacterial Infection