Assessment of preferential T-helper 1 or T-helper 2 induction by low molecular weight compounds using the local lymph node assay in conjunction with RT-PCR and ELISA for interferon-γ and interleukin-4

82Citations
Citations of this article
12Readers
Mendeley users who have this article in their library.
Get full text

Abstract

The local lymph node assay (LLNA) is a new and promising test in mice used to identify contact allergens by means of dermal exposure. Experimentally this assay, which comprises a sensitizing phase only, is also used to identify respiratory allergens. Another, experimentally used test in mice to identify allergens is also based on dermal exposure, but comprises both a sensitizing and effector phase. In this latter test, it has been shown that contact allergens preferentially induce a T-helper 1 (TH1) response, whereas respiratory allergens preferentially induce a T-helper 2 (TH2) response. These responses can be discriminated on the basis of cytokine production, such as IFN-γ which is produced by TH1 cells, and IL-4, which is produced by TH2 cells. The aim of the study was to establish whether the LLNA was sufficient to not only identify allergens but also mark them as either a contact or a respiratory allergen. To this end, LLNA responses to the contact allergen dinitrochlorobenzene (DNCB) and the respiratory allergen trimellitic anhydride (TMA) were determined using IFN-γ and IL-4 mRNA expression and production as parameters. Topical application of TMA resulted in a threefold higher lymphocyte proliferation compared to DNCB 3 and 5 days after the first application, while a similar proliferation was found from Day 7 and onward. RT-PCR showed a similar induction of IFN-γ and IL-4 mRNA expression. While both DNCB and TMA induced IFN-γ production, TMA but not DNCB induced IL-4 production. Thus, only IL-4 production seemed a suitable parameter to discriminate between the two compounds. In a second study, the respiratory allergens toluene-2,4-diisocyanate (TDI) and phthalic anhydride (PA) were also assayed 7 days after the first application. Topical application of DNCB and PA resulted in a similar lymphocyte proliferation, while application of TMA and TDI resulted in a 1.8-fold higher proliferation. IFN-γ production was similar for DNCB, TMA, and TDI, and fourfold lower for PA, while IL-4 production was similar for TMA, TDI, and PA, and 24-fold lower for DNCB. In summary, both studies showed induction of IL-4 production by respiratory allergens, with little or no induction by the contact allergen, holding promise for the possibility of identifying respiratory allergens within the LLNA by measuring IL-4 production 7 days after the first application. (C) 2000 Academic Press.

Cite

CITATION STYLE

APA

Vandebriel, R. J., De Jong, W. H., Spiekstra, S. W., Van Dijk, M., Fluitman, A., Garssen, J., & Van Loveren, H. (2000). Assessment of preferential T-helper 1 or T-helper 2 induction by low molecular weight compounds using the local lymph node assay in conjunction with RT-PCR and ELISA for interferon-γ and interleukin-4. Toxicology and Applied Pharmacology, 162(2), 77–85. https://doi.org/10.1006/taap.1999.8841

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free