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EFFECTS OF IL-4 UPON THE ACTIVITY OF STAT6 TRANSCRIPTION FACTOR IN PERIPHERAL BLOOD LYMPHOCYTES IN BRONCHIAL ASTHMA

https://doi.org/10.15789/1563-0625-2009-2-3-177-184

Abstract

Abstract. The aim of the study is to specify the levels of STAT6, and phospho-STAT6 under the influence of IL-4 in patients with bronchial asthma (BA). The samples from ten healthy controls and thirty-three BA patients with allergic and non-allergic clinical forms of different severity were under investigation. Peripheral blood lymphocytes were treated with 10 ng/ml of IL-4 (Sigma Aldrich, USA) for 1 h. Then the proteins (STAT6 and phospho-STAT6) expressed in peripheral lymphocytes were analyzed by Western blot of cell lysates. Preparation of the cell lysates and Western blotting were carried out using standard procedures. Antibodies against phospho-STAT6 and STAT6 (10 ng/ml) were used (Cell Signaling, USA). Levels of thespecific proteins were standardized according to β-actin (Cell Signaling, USA). Treatment with IL-4 caused an increase of phospho-STAT6 levels in lymphocytes of all BA patients, as compared with control group. In allergic BA, the phospho-STAT6 levels were significantly higher than in non-allergic clinical forms. Expression of STAT6 in lymphocytes of patients with severe BA was significantly higher, as compared to BA of moderate severity. An IL-4-induced activation of the STAT6 transcription factor was revealed in an in vitro system, being mostly expressed in allergic BA. The level of STAT6 may serve as a BA severity index. This study was supported by a «Scholarship of the Year» grant from the St. Petersburg State Medical I. Pavlov University (2007).

About the Authors

V. N. Mineev
Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова
Russian Federation


L. N. Sorokina
Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова
Russian Federation


M. A. Nyoma
Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова
Russian Federation


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For citations:


Mineev V.N., Sorokina L.N., Nyoma M.A. EFFECTS OF IL-4 UPON THE ACTIVITY OF STAT6 TRANSCRIPTION FACTOR IN PERIPHERAL BLOOD LYMPHOCYTES IN BRONCHIAL ASTHMA. Medical Immunology (Russia). 2009;11(2-3):177-184. (In Russ.) https://doi.org/10.15789/1563-0625-2009-2-3-177-184

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