Lymphoblastoid cell lines of Rett syndrome patients exposed to oxidative-stress-induced apoptosis.
Despite the identification of mutations in the methyl CpG binding protein 2 gene, the pathogenesis of Rett syndrome (RS) is still unknown. In order to clarify the role of apoptosis in this disorder, we studied lymphoblastoid cell lines in five classical RS patients and five controls, incubated with 2-deoxy-d-ribose (dRib), a reducing sugar that induces apoptosis in human cells, through oxidative damage. The apoptotic response was detected by flow cytometric analysis and agarose gel electrophoresis. The cells of RS patients showed a lower percentage of apoptosis in a routine condition than those of controls did, whereas, in the presence of dRib, the percentage of apoptotic cells in RS patients increased with time and reached the same percentage of those of controls at 72 h. The data observed here suggest that RS may have a low susceptibility or an increased resistance to the apoptotic cell death, which may be corrected only in the presence of a strong apoptotic stimulus.
Unit of Neurometabolic Diseases, Department of Neurology and Behavioural Sciences, Azienda Ospedaliera Senese and University, Siena, Italy.
Carla
C
Battisti
Patrizia
P
Formichi
Sergio Antonio
SA
Tripodi
Ilaria
I
Meloni
Paola
P
Mangiavacchi
Michele
M
Zappella
Antonio
A
Federico
D000293:Adolescent; D017209:Apoptosis / Q000187:drug effects / Q000235:genetics*; D002461:Cell Line, Transformed; D002648:Child; D002675:Child, Preschool; D004247:DNA / Q000032:analysis / Q000235:genetics; D004249:DNA Damage / Q000187:drug effects / Q000235:genetics; D004268:DNA-Binding Proteins / Q000235:genetics*; D003855:Deoxyribose / Q000494:pharmacology; D005260:Female; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D006801:Humans; D008214:Lymphocytes / Q000187:drug effects / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects / Q000235:genetics*; D015518:Rett Syndrome / Q000235:genetics* / Q000378:metabolism* / Q000503:physiopathology
D004268:DNA-Binding Proteins; C489325:MBD2 protein, human; D003855:Deoxyribose; D004247:DNA