RESEARCH PAPER
Contact allergy to nickel: patch test score correlates with IL-5, but not with IFN-gamma nickel-specific secretion by peripheral blood lymphocytes.
 
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1
Institute of Clinical and Environmental Toxicology, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland.
2
Institute of Pathophysiology, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
3
Department of Clinical Biochemistry, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
4
Institute of Dermatology Ltd., Kraków, Poland
 
Ann Agric Environ Med. 2009;16(1):37–41
 
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ABSTRACT
Traditionally, allergic contact dermatitis (ACD) has been associated with the activity of Th1 lymphocytes that secrete interferon gamma. Recent evidence indicates that other cells, e.g. interleukin 5 (IL-5)-secreting Th2 or Tc2 cells may be among the key effectors of ACD. The aim of the present study was to assess the influence of nickel-specific IFN-gamma secretion (marker of Th1 and Tc1 activity) and IL-5 secretion (Th2 and Tc2) on the clinical outcome (patch test score) in nickel-allergic patients. 40 women with suspicion of ACD were involved, aged from 14-54 (median 31.5) years. They were patch tested with NiSO4. Peripheral blood mononuclear cells (PBMC) from the patients were cultured and analysed for IFN-gamma and IL-5 secretion in response to NiSO4. A series of statistical models (classical logit or cloglog link function) were used. We demonstrate that nickel-specific IL-5 secretion by PBMC is correlated with the intensity of patch test reaction (p=0.05), with no significant effect of IFN-gamma. An increase in the nickel-specific IL-5 secretion from PBMC by 10 pg/ml is associated with a 10-20% increase (depending on statistical model) in the odds ratio of the patient to have a higher patch test score. These findings support the assumption that cells secreting IL-5 (e.g. Th2, Tc2) play a more important role in the pathogenesis of ACD than previously thought.
eISSN:1898-2263
ISSN:1232-1966