Absence of circulating natural killer and primed CD8+ cells in life-threatening varicella.
J Infect Dis
; 191(2): 198-206, 2005 Jan 15.
Article
em En
| MEDLINE
| ID: mdl-15609229
ABSTRACT
Five pediatric patients with no history of immunodeficiency had a life-threatening course of varicella. Strikingly, natural killer (NK) cells were absent from the circulation in all children, and, despite active viral infection, up to 98% of the CD8(+) cells were naive. Primary immunodeficiencies were excluded--NK cells and primed CD8(+) cells reappeared in the circulation, granzymes were detectable in plasma early during infection, and no abnormalities could be detected in interleukin-15 receptor function. Our data indicate that varicella-zoster virus (VZV) has a unique capability to seclude primed CD8(+) cells and NK cells from the circulating lymphocyte pool. This may be the consequence of an overwhelming immune response to VZV that is influenced by factors such as infectious dose, age, and the presence of maternal antibodies during infancy. Because both homozygous twin sisters in the study had a severe course of varicella, particular genetic factors may contribute to severe varicella.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Células Matadoras Naturais
/
Varicela
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Herpesvirus Humano 3
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Linfócitos T CD8-Positivos
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Imunocompetência
Limite:
Child, preschool
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Female
/
Humans
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Infant
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Male
Idioma:
En
Revista:
J Infect Dis
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Holanda