Impaired production of gamma-interferon by newborn cells in vitro is due to a functionally immature macrophage.

The decreased production of gamma-(PHA-induced) interferon (IFN) by leukocytes of normal newborns could be due to functionally immature T cells, macrophages, or both. We studied gamma-IFN production by macrophages and T cells, alone and in combination, obtained from 50 cord blood samples and 14 adult blood samples in a series of experiments. Adherent macrophages were cultivated for 7 days before the addition of T cells. After 48 hr, PHA-stimulated macrophage-T cell supernatants were harvested and assayed for IFN by a microassay. Macrophage-T cell cultures of autologous and nonautologous cells in 14 adults showed enhanced IFN production (GMT 121 +/- 5 IU) as compared with Ficoll-Hypaque mononuclear cells (GMT 42 +/- 5 IU). No IFN was detected in supernatants from PHA-stimulated Ficoll-Hypaque cord cells alone or macrophage-T cord combined cultures. Combined cord macrophages and adult T cells produced minimal IFN (GMT 13 +/- 3 IU); however, cord T cells combined with adult macrophages showed enhanced IFN production (GMT 195 +/- 47 IU). This cord macrophage dysfunction was not due to an inhibitor and improved with the time of in vitro cultivation. These results indicate that the neonatal macrophage is primarily responsible for the impaired gamma-IFN response by the newborn cells.

• Publication year

  1985

• Venue

  Journal of Immunology

• Publication date

  1985-03-01

• Fields of study

  Biology, Medicine

• Identifiers
  DOI 10.4049/jimmunol.134.3.1493PMID 3918100
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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