Leukotriene A4 hydrolase in peripheral leukocytes of patients with atopic dermatitis
Autor: | Hiroko Okano-Mitani, Kouichi Ikai, Sadao Imamura |
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Rok vydání: | 1996 |
Předmět: |
Adult
Male medicine.medical_specialty Allergy Adolescent Neutrophils Dermatology Peripheral blood mononuclear cell Monocytes Dermatitis Atopic Pathogenesis Leukotriene-A4 hydrolase Atopy Internal medicine Hydrolase Leukocytes medicine Humans Epoxide Hydrolases Leukotriene business.industry General Medicine Atopic dermatitis medicine.disease body regions Endocrinology Immunology Female business |
Zdroj: | Archives of Dermatological Research. 288:168-172 |
ISSN: | 1432-069X 0340-3696 |
DOI: | 10.1007/bf02505219 |
Popis: | We examined the enzymatic activity of leukotriene (LT) A4 hydrolase, which catalyzes the conversion of LTA4 to LTB4, in peripheral leukocytes of patients with atopic dermatitis. The patients were divided into three categories (severe, moderate and mild) on the basis of clinical severity. The LTA4 hydrolase activities in the supernatant fraction of peripheral blood polymorphonuclear leukocytes (PMN) were significantly higher in preparations of cells from severe atopic dermatitis patients (123.94 +/- 16.61 pmol/10(6) cells per min) than in those from moderate (49.03 +/- 9.43 pmol/ 10(6) cells per min; P0.01) and mild (28.75 +/- 11.42 pmol/10(6) cells per min; P0.01) atopic dermatitis patients and normal controls (15.14 +/- 1.74 pmol/10(6) cells per min; P0.01). LTA4 hydrolase activities were also higher in peripheral blood mononuclear cells (PBMC) from severe atopic dermatitis patients (27.81 +/- 8.28 pmol/10(6) cells per min) than in those from moderate (11.31 +/- 2.11 pmol/10(6) cells per min; P0.05) and mild (6.16 +/- 2.62 pmol/10(6) cells per min; P0.05) atopic dermatitis patients and normal controls (11.17 +/- 0.83 pmol/10(6) cells per min; P0.05). LTA4 hydrolase activities in PMN were reduced after improvement of the disease in eight patients with severe or moderate atopic dermatitis. These results suggest that LTA4 hydrolase, which synthesizes LTB4, plays a significant role in the pathogenesis and development of atopic dermatitis. |
Databáze: | OpenAIRE |
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