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Single-cell perforin and granzyme expression reveals the anatomical localization of effector CD[8.sup.+] T cells in influenza virus-infected mice
- Source :
- Proceedings of the National Academy of Sciences of the United States. March 4, 2003, Vol. 100 Issue 5, p2657, 6 p.
- Publication Year :
- 2003
-
Abstract
- Influenza virus infection activates cytolytic T lymphocytes (CTL) that contribute to viral clearance by releasing perforin and granzymes from cytoplasmic granules. Virus-specific, perforin-dependent CD[8.sup.+] CTL were detected in freshly isolated cells from the mouse lung parenchyma but not from the mediastinal lymph nodes (MLN), where they are primed, or from the spleen during primary influenza virus infection. To determine whether this difference was due to the low frequency or incomplete maturation of effector CTL in MLN, we measured expression of perforin, granzymes A, B, and C, and IFN-[gamma] mRNAs in CD[8.sup.+] populations and single cells immediately after isolation from virus-infected mice. Quantitative PCR revealed significant expression of perforin, granzyme A, granzyme B, and IFN-[gamma] in activated CD[8.sup.+] cells from MLN, spleen, and lung parenchyma. Granzyme C expression was not detected. Individual activated or nucleoprotein peptide/class I tetramer-binding CD[8.sup.+] cells from the three tissues expressed diverse combinations of perforin, granzyme, and IFN-[gamma] mRNAs. Although cells from lung expressed granzymes A and B at higher frequency, each of the tissues contained cells that coexpressed perforin with granzymes A and/or B. The main difference between MLN and lung was the elevated frequency of activated CD[8.sup.+] T cells in the lung, rather than their perforin/granzyme expression profile. The data suggest that some CTL mature into perforin/granzyme-expressing effector cells in MLN but reach detectable frequencies only when they accumulate in the infected lung.
- Subjects :
- Medical research -- Analysis
Medicine, Experimental
Influenza viruses -- Physiological aspects
Influenza viruses -- Research
T cells -- Genetic aspects
T cells -- Physiological aspects
Cytoplasm -- Genetic aspects
Cytoplasm -- Physiological aspects
Lymph nodes -- Physiological aspects
Gene expression -- Physiological aspects
Messenger RNA -- Genetic aspects
Carrier proteins -- Physiological aspects
Carrier proteins -- Genetic aspects
Science and technology
Subjects
Details
- ISSN :
- 00278424
- Volume :
- 100
- Issue :
- 5
- Database :
- Gale General OneFile
- Journal :
- Proceedings of the National Academy of Sciences of the United States
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.99148339