Contact WAO | e-News Sign Up | Site Map | Home  
World Allergy Organization
WAO's mission: To be a global resource and advocate in the field of allergy, advancing excellence in clinical care through education, research and training as a world-wide alliance of allergy and clinical immunology societies.

IgE and IgE Receptors in ‘Allergic’ Skin Diseases

Immunomodulation and the Treatment of Hives and Eczema

Johannes Ring
Technische Universität München
München, Germany

Abstract

Modern approaches in the management of hives and eczema

Johannes Ring, Markus Ollert, Ulf Darsow, Heidrun Behrendt

Urticaria (hives) and Eczema (atopic eczema, atopic dermatitis) represent the most common skin diseases, next to allergic contact dermatitis and exzanthematous drug eruptions. Urticaria can be classified according to kinetics into acute (less than 6 weeks) and chronic (occurring over more than 6 weeks). In the management of urticaria a 3 step schedule is recommended with basic (step 1), intense (step 2) and challenge test examination (step 3). If done properly, after elimination of relevant causal factors in a long-time observation, 80% of patients become symptom-free. Antihistamines are first-line therapy in acute urticaria, i.v., sometimes together with glucocorticoids. After adequate diagnostic work-up, nonsedating H1-antagonists should be given for a period of at least 4 weeks independently of the occurrence of skin lesions. In cases of autoimmune urticaria a positive autologous serum test ("Greaves test") is diagnostic, and immunomodulating treatment (cyclosporin, i.v. IG) or leukotriene antagonists have been used.

Eczema is an inflammatory chronically relapsing, non-contagious and extremely pruritic skin disease with a certain genetic background ("atopic diathesis") which is also common to allergic asthma and rhinoconjunctivitis. The management of eczema patients comprises a complex spectrum of activities aiming at distinct pathophysiological features, such as emollients, in trying to restore the disturbed epidermal barrier function, anti-inflammatory treatment with topical steroids or the new topical calcineurin inhibitors, UV treatment, antimicrobial strategies, and in severe cases systemic immunosuppression or climate therapy approaches. The role of allergy has long been controversial in eczema. However, using the "Atopy Patch Test" (APT) we proved that IgE inducing allergens can elicit eczematous skin reactions on uninvolved, untreated skin; most common elicitors are house dust mites, grass pollen, and animal epithelia, but also food allergens. APT has the highest specificity compared to skin prick test and IgE measurement. On the basis of allergy diagnosis, specific avoidance strategies are indicated. The use of allergen-specific immunotherapy (ASIT) in eczema is controversial. Some controlled trials have shown significant effects. The current state of the art regarding ASIT in eczema may be compared to its position in 1955 in respect to hay fever. For tertiary prevention, educational programs such as "eczema schools" have been developed and successfully evaluated in a multicenter national trial in Germany.

In the future, novel immunomodulatory approaches including anti-IgE, soluble IL4 receptors, or antibodies against other cytokines (anti IL5, etc) but also novel modes of allergen specific immunotherapy may enrich our therapeutic arsenal. The rapid progress in experimental allergology and dermatology has led to a new understanding of eczema subgroups and possibly will give rise to new therapeutic and preventive strategies.

References:

Ring J, Allergy in practice. Springer, Berlin, Heidelberg, New York, 2005-01-19

Darsow U, Ring J. Atopic eczema, allergy and the Atopy Patch Test. Allergy Clin Immunol International/JWAo 14(2002) 170-173

Leung D, Greaves M (eds). Allergic skin disease, Marcel Dekker, New York, 2000

Ring J, Brockow K, Abeck D. The therapeutic concept of “patient management” in atopic eczema. Allergy 51 (1996) 206-215

Holgate St., Church MK, Lichtenstein LM. Allergy, 2nd edition, Mosby, London, 2001

Denburg JA (ed.). Allergy and allergic diseases, the mechanisms and therapeutics. Humana press, Totowa / New Jersey 1998

 

Slide presentation

Return to top
Return to WAF: San Antonio index