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Updated: Feb 8, 2026

In Vitro Differentiation of Human CD4+FOXP3+ Induced Regulatory T Cells (iTregs) from Naïve CD4+ T Cells Using a TGF-β-containing Protocol
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Association between environmental exposure and CD4+CD25+ regulatory T cells.

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|July 8, 2018
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Summary

Farm environments may protect against asthma, but this study found no significant difference in T-regulatory cell markers (CD4+/CD25+ and CD4+/CD25+Foxp3+) between children with asthma living in farm versus rural areas. This suggests living environment alone doesn't impact these specific immune cells in HDM-allergic children.

Keywords:
ChildrenEnvironmentRegulatory cells

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Area of Science:

  • Immunology
  • Environmental Health
  • Pediatric Allergy

Background:

  • Farm environments are hypothesized to offer protection against allergies and asthma in children due to increased endotoxin exposure.
  • Understanding the immunological mechanisms behind this potential protective effect is crucial for developing targeted interventions.

Purpose of the Study:

  • To investigate and compare the expression of CD4+/CD25+ T-regulatory cells and the transcription factor Foxp3 in children with asthma and house dust mite allergy.
  • To determine if there are differences in these immune markers between children residing in farm areas versus rural areas.

Main Methods:

  • A prospective study involving 35 children (aged 8-16) diagnosed with allergic rhinitis (allergic to house dust mites) and newly diagnosed asthma.
  • Participants were categorized into two groups: those living in farm areas (n=19) and those in rural areas (n=16).
  • Flow cytometry was used to measure the surface expression of CD4+/CD25+ T-regulatory cells and Foxp3 on peripheral blood mononuclear cells (PBMCs).

Main Results:

  • No statistically significant differences were observed in the expression levels of CD4+/CD25+ T-regulatory cells and CD4+/CD25+Foxp3+ cells.
  • These differences were not found either within the groups or when comparing the farm area group to the rural area group.

Conclusions:

  • The study concludes that the expression of CD4+/CD25+ and CD4+/CD25+Foxp3+ cells is not associated with the place of residence (farm vs. rural) in children with asthma sensitive to house dust mites.
  • These findings suggest that other factors may play a more significant role in the immune response of asthmatic children related to their living environment.