BACKGROUND: Although both interleukin-4 (IL-4) and IL-13 induce immunoglobulin E (IgE) production in vitro, the relative contribution of the two cytokines in various skin lesions of atopic dermatitis remains unclear. OBJECTIVE: We examined the relative importance of IL-4 and IL-13 in lesional skin of atopic dermatitis for IgE production. METHODS: The study group comprised 28 atopic dermatitis patients with serum IgE levels more than 2000 IU/ml. The expression levels of IL-4 mRNA and IL-13 mRNA versus that of glyceraldehyde-3-phosphate dehydrogenase (GAPDH) were determined using a semiquantitative reverse transcription-polymerase chain reaction (RT-PCR) method in samples of normal-appearing skin from seven patients, very mild lesions from eight patients, subacute lesions from ten patients and lichenified lesions from ten patients with atopic dermatitis, and in samples of normal skin from six healthy control subjects. RESULTS: IL-4 mRNA expression was identified in only two of the eight very mild lesions, one of the ten subacute lesions, and none of the ten lichenified lesions, whereas IL-13 mRNA expression was identified in 27 of the 28 skin lesions of atopic dermatitis. The IL-13 mRNA/GAPDH mRNA ratios (x100) in the subacute lesions (94.4+/-20.6) and lichenified lesions (71.4+/-40.4) were significantly greater than in the skin of healthy controls (13.1+/-17.7; P<0.01, P<0.05, respectively). CONCLUSIONS: Upregulation of IL-13 mRNA in subacute and chronic lesions of atopic dermatitis along with scant expression of IL-4 mRNA suggest that IL-13 is a crucial cytokine in lesional skin.
BACKGROUND: Although both interleukin-4 (IL-4) and IL-13 induce immunoglobulin E (IgE) production in vitro, the relative contribution of the two cytokines in various skin lesions of atopic dermatitis remains unclear. OBJECTIVE: We examined the relative importance of IL-4 and IL-13 in lesional skin of atopic dermatitis for IgE production. METHODS: The study group comprised 28 atopic dermatitispatients with serum IgE levels more than 2000 IU/ml. The expression levels of IL-4 mRNA and IL-13 mRNA versus that of glyceraldehyde-3-phosphate dehydrogenase (GAPDH) were determined using a semiquantitative reverse transcription-polymerase chain reaction (RT-PCR) method in samples of normal-appearing skin from seven patients, very mild lesions from eight patients, subacute lesions from ten patients and lichenified lesions from ten patients with atopic dermatitis, and in samples of normal skin from six healthy control subjects. RESULTS:IL-4 mRNA expression was identified in only two of the eight very mild lesions, one of the ten subacute lesions, and none of the ten lichenified lesions, whereas IL-13 mRNA expression was identified in 27 of the 28 skin lesions of atopic dermatitis. The IL-13 mRNA/GAPDH mRNA ratios (x100) in the subacute lesions (94.4+/-20.6) and lichenified lesions (71.4+/-40.4) were significantly greater than in the skin of healthy controls (13.1+/-17.7; P<0.01, P<0.05, respectively). CONCLUSIONS: Upregulation of IL-13 mRNA in subacute and chronic lesions of atopic dermatitis along with scant expression of IL-4 mRNA suggest that IL-13 is a crucial cytokine in lesional skin.
Authors: Dirkjan Hijnen; Edward F Knol; Yoony Y Gent; Barbara Giovannone; Scott J P Beijn; Thomas S Kupper; Carla A F M Bruijnzeel-Koomen; Rachael A Clark Journal: J Invest Dermatol Date: 2012-12-06 Impact factor: 8.551
Authors: Lam C Tsoi; Elke Rodriguez; Frauke Degenhardt; Hansjörg Baurecht; Ulrike Wehkamp; Natalie Volks; Silke Szymczak; William R Swindell; Mrinal K Sarkar; Kalpana Raja; Shuai Shao; Matthew Patrick; Yilin Gao; Ranjitha Uppala; Bethany E Perez White; Spiro Getsios; Paul W Harms; Emanual Maverakis; James T Elder; Andre Franke; Johann E Gudjonsson; Stephan Weidinger Journal: J Invest Dermatol Date: 2019-01-11 Impact factor: 7.590