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Pediatr Allergy Immunol. 2006 May;17(3):218-20.

Hypomethylation of DNA and resistance to apoptosis in tonsillar hypertrophy in children.

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1
Molecular Biology Service, Virgen Macarena University Hospital, Sevilla, Spain.

Abstract

We analyzed the hypomethylation of DNA and the sensitivity to apoptosis of tonsillar cells and peripheral blood lymphocytes (PBL) in twenty children with either recurrent tonsillitis (RT) or tonsillar hypertrophy (TH). We found no significant differences in DNA methylation of PBL obtained from RT and TH groups. Hypomethylation of DNA extracted from tonsillar tissue was higher in TH than in RT and was associated with lower spontaneous and thapsigargin-induced apoptosis. By contrast, RT showed a low level of DNA hypomethylation and was associated with high sensitivity to spontaneous and thapsigargin-induced apoptosis.

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