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An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection
09:01

An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection

Published on: December 10, 2013

Deficiency in interferon production by leukocytes from children with recurrent respiratory infections

A Pitkäranta1, P Karma, T Hovi

  • 1Department of Viral Diseases, National Public Health Institute University of Helsinki, Finland.

Clinical and Diagnostic Virology
|July 1, 1993
PubMed

Insights

Children with recurrent respiratory infections show reduced interferon production when exposed to common viruses and Mycoplasma pneumoniae. This deficiency may play a role in the development of these frequent infections.

Area of Science:

  • Immunology
  • Virology
  • Pediatrics

Background:

  • Recurrent upper respiratory tract infections (URTIs) are common in children.
  • Interferon (IFN) production is a key immune response to viral and bacterial infections.
  • Previous studies suggest a potential link between impaired IFN production and recurrent infections.

Purpose of the Study:

  • To investigate in vitro interferon production in children with recurrent URTIs.
  • To compare IFN production capacity between children with recurrent URTIs and healthy controls.
  • To identify specific inducers that elicit differential IFN responses.

Main Methods:

  • Peripheral blood mononuclear cells (PBMCs) were isolated from 50 children with recurrent URTIs and 50 healthy children.
  • PBMCs were stimulated in vitro with six different inducers: five respiratory viruses (adeno, rhino, corona, RS, influenza A) and Mycoplasma pneumoniae.
  • Interferon production levels were measured and compared between the two groups.

Main Results:

  • All children's cells responded to at least three inducers.
  • Cells from children with recurrent URTIs demonstrated significantly lower IFN production when stimulated with adeno, rhino, corona, RS viruses, or Mycoplasma pneumoniae compared to controls.
  • A similar trend of reduced IFN production was observed for influenza A virus-induced responses.

Conclusions:

  • A relative deficiency in interferon production, specific to certain inducers, is observed in children with recurrent upper respiratory tract infections.
  • This inducer-specific IFN deficiency may contribute to the pathogenesis of recurrent respiratory infections.
  • Findings support the role of innate immune dysregulation in the susceptibility to recurrent URTIs.

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