Development of asthma in Inner-City Children: Possible roles of MAIT cells and variation in the home environment

Shilpi Chandra, Gerhard Wingender, Jason A. Greenbaum, Archana Khurana, Amin M. Gholami, Anusha Preethi Ganesan, Michael Rosenbach, Katy Jaffee, James E. Gern, Robert Wood, George O'Connor, Megan Sandel, Meyer Kattan, Leonard Bacharier, Alkis Togias, Anthony A. Horner, Mitchell Kronenberg

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Humans have populations of innate-like T lymphocytes with an invariant TCR a-chain that recognize nonpeptide Ags, including invariant NKT (iNKT) cells and mucosal-associated invariant T (MAIT) cells. iNKT cell involvement in human asthma is controversial, whereas there has been little analysis of MAIT cells. Using peripheral blood cells from 110 participants from the Urban Environment and Childhood Asthma (URECA) birth cohort study, these cells were analyzed for number and function. We determined whether iNKT cell or MAIT cell frequency at 1 y is correlated with the cytokine polarization of mainstream CD4+ T cells and/or the development of asthma by age 7 y. Dust samples from 300 houses were tested for iNKT cell antigenic activity. Our results show that a higher MAIT cell frequency at 1 y of age was associated with a decreased risk of asthma by age 7 y. The frequency of MAIT cells was associated with increased production of IFN-γ by activated CD4 + T cells from the URECA cohort. iNKT cell antigenic activity in bedroom dust samples was associated with higher endotoxin concentration and also with reduced risk of asthma. In conclusion, MAIT cell frequency at 1 y may reflect the tendency of the immune system toward Th1 responses and is associated with protection from asthma. Additionally, iNKT cell antigenic activity may be a marker of houses with increased microbial exposures and therefore also with protection from asthma.

Original languageEnglish
Pages (from-to)1995-2003
Number of pages9
JournalJournal of Immunology
Volume200
Issue number6
DOIs
StatePublished - Mar 15 2018

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