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  • Title: HLA-restricted CD8+ cytotoxic T lymphocyte, interferon-gamma, and interleukin-4 responses to respiratory syncytial virus infection in infants and children.
    Author: Mbawuike IN, Wells J, Byrd R, Cron SG, Glezen WP, Piedra PA.
    Journal: J Infect Dis; 2001 Mar 01; 183(5):687-96. PubMed ID: 11181144.
    Abstract:
    CD8+ cytotoxic T lymphocyte (CTL) activity, interferon (IFN)-gamma, and interleukin (IL)-4 production were evaluated in a blinded manner among respiratory syncytial virus (RSV)-infected newborns and their mothers for 3 epidemic seasons. Most mothers (80%) exhibited RSV-specific CD8+ CTL activity. Twenty (80%) of the 26 infants exhibited significant RSV-specific CTL activity during or after their first RSV season. CTL frequency increased with RSV infection rate, reaching 75% by the end of the third season. Most infants who shed virus (75%) had a medically attended lower respiratory tract disease (LRD). In the first year, RSV-infected infants (virus culture and antibody increase) were more likely to develop CTL activity (10 of 13) than were uninfected infants (1 of 5; P=.02). Infants with CTL activity in the first year were less likely to have an LRD in the second year. CD8+ CTL levels correlated positively with IFN-gamma (P<.001) and inversely with IL-4 (P=.03). Contribution of CD8+ CTL and IFN-gamma in the control of RSV disease in infants and children is implicated.
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