Volume 176, Issue 1 pp. 176-183
General Dermatology

Cross-reactivity between methylisothiazolinone, octylisothiazolinone and benzisothiazolinone using a modified local lymph node assay

J.F. Schwensen

Corresponding Author

J.F. Schwensen

National Allergy Research Centre, Department of Dermato-Allergology, Copenhagen University Hospital Gentofte, Kildegårds Allé, 2900 Hellerup, Denmark

Correspondence

Jakob F. Schwensen.

E-mail: [email protected]

Search for more papers by this author
C. Menné Bonefeld

C. Menné Bonefeld

Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

Search for more papers by this author
C. Zachariae

C. Zachariae

Department of Dermato-Allergology, Copenhagen University Hospital Gentofte, Kildegårds Allé, 2900 Hellerup, Denmark

Search for more papers by this author
C. Agerbeck

C. Agerbeck

Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

Search for more papers by this author
T.H. Petersen

T.H. Petersen

Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

Search for more papers by this author
C. Geisler

C. Geisler

Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

Search for more papers by this author
U.E. Bollmann

U.E. Bollmann

Department of Environmental Science, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark

Search for more papers by this author
K. Bester

K. Bester

Department of Environmental Science, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark

Search for more papers by this author
J.D. Johansen

J.D. Johansen

National Allergy Research Centre, Department of Dermato-Allergology, Copenhagen University Hospital Gentofte, Kildegårds Allé, 2900 Hellerup, Denmark

Search for more papers by this author
First published: 25 June 2016
Citations: 44
Funding sources The National Allergy Research Centre is supported by a nonrestricted grant from the Danish Environmental Protection Agency. The Aage Bang Foundation, a nonprofit organization, additionally funded this work.
Conflicts of interest None declared.

Plain language summary available online

Summary

Background

In the light of the exceptionally high rates of contact allergy to the preservative methylisothiazolinone (MI), information about cross-reactivity between MI, octylisothiazolinone (OIT) and benzisothiazolinone (BIT) is needed.

Objectives

To study cross-reactivity between MI and OIT, and between MI and BIT.

Methods

Immune responses to MI, OIT and BIT were studied in vehicle and MI-sensitized female CBA mice by a modified local lymph node assay. The inflammatory response was measured by ear thickness, cell proliferation of CD4+ and CD8+ T cells, and CD19+ B cells in the auricular draining lymph nodes.

Results

MI induced significant, strong, concentration-dependent immune responses in the draining lymph nodes following a sensitization phase of three consecutive days. Groups of MI-sensitized mice were challenged on day 23 with 0·4% MI, 0·7% OIT and 1·9% BIT – concentrations corresponding to their individual EC3 values. No statistically significant difference in proliferation of CD4+ and CD8+ T cells was observed between mice challenged with MI compared with mice challenged with BIT and OIT.

Conclusions

The data indicate cross-reactivity between MI, OIT and BIT, when the potency of the chemical was taken into account in choice of challenge concentration. This means that MI-sensitized individuals may react to OIT and BIT if exposed to sufficient concentrations.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.