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Brüche am MLL-Gen durch apoptotische Vorgänge im Zuge von Probenalterungen im Vergleich zu Brüchen im MLL-Gen bei t-AML

MLL rearrangements emerge during spontaneous apoptosis of clinical blood samples

by Kamran Karim
Doctoral thesis
Date of Examination:2011-09-02
Date of issue:2011-01-17
Advisor:Prof. Dr. Frank Griesinger
Referee:Prof. Dr. Frank Griesinger
Referee:Prof. Dr. Patricia Virsik-Köpp
Referee:Prof. Dr. Barbara Zoll
crossref-logoPersistent Address: http://dx.doi.org/10.53846/goediss-912

 

 

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Abstract

English

We conclude that MLL breakage and religation in the topoisomerase-sensitive bcr, leading to MLL rearrangements (deletions, insertions) in clinical samples, may occur not only after exposure to topoisomerase II inhibitors but also during spontaneous apoptosis of clinical samples. The MLL gene is sensitive to site-specific cleavage in the t-AML-associated bcr during the initial stages of apoptosis owing to a colocalized scaffold attachment region.7 Religation of cleaved MLL, implicating an at least partially intact DNA repair, has however never been observed during spontaneous apoptosis in clinical samples. Our observation suggests that the rapid processing of samples (less than 24 h) is a prerequisite to discern therapy-induced MLL rearrangements from those that are associated with spontaneous apoptosis
Keywords: MLL-Gene

Other Languages

Im Zuge unserer Experimente am MLL-Gen konnten wir feststellen, das Brüche am MLL-Gen nicht ausschließlich durch Exposition mit Chemo- oder Strahlentherapie entstehen, sondern auch durch andere Faktoren wie z.B. spontane Apotose durch verlängerte Lagerungszeiten möglich ist. Daher ist für wietere Experimente auf dem Gebiet sehr wichtig, für die Verarbeitung der Proben nicht länger als 12 Stunden zu benötigen. Auch sollte der genaue Wirkmechanismus der Topoisomerase-II-Hemmer am MLL-Gen noch genuaer untersucht werden.
Schlagwörter: MLL-Gen
 

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