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Abstract
Low natural killer cytotoxicity has been associated with serious herpes simplex virus infections. Neonates' mononuclear cells had significantly lower NKC to HSV infected (P less than 0.001) and uninfected (P less than 0.005) target cells than did adults' MC. Under appropriate conditions, both neonates' MC to NKC was increased by exogenous human leukocyte interferon. Although neonates' and adults' MC had a similar sensitivity to interferon, there was a significant (P = 0.05) lack of consistency in neonates' MC response. Twenty-three percent (4/17) of neonates' MC samples did not respond with increased NKC in the presence of interferon, unlike adults' MC, all of which demonstrated increased NKC. Neonates' MC did not suppress adults' MC-NKC. These data demonstrate the efficacy of interferon as an NKC stimulator in the neonate, but indicate a heterogeneous response of neonatal cells. We are encouraged with the prospect of clinical trials of interferon to treat severe viral infections in neonates. We urge the inclusion of immune surveillance in these trials.
Published Version
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