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DOI: 10.1055/s-2000-7426
Georg Thieme Verlag Stuttgart · New York
Detektion differenziell exprimierter Gene beim primären Mammakarzinom mittels cDNA-Array-Hybridisierung
Detection of Differentially Expressed Genes in Breast Cancer with cDNA-Array HybridizationPublication History
Publication Date:
31 December 2000 (online)
Zusammenfassung
Fragestellung
Die molekularen Veränderungen, die zur Entstehung und Metastasierung beim primären Mammakarzinom führen, sind bisher unzureichend geklärt. Die Analyse pathologisch veränderter Genaktivität kann zur Aufklärung von Krankheitsmechanismen, Verbesserung der Diagnostik und zur Identifizierung neuer therapeutischer Angriffspunkte beitragen. Mittels einer neuen Untersuchungstechnik, der cDNA-Array-Hybridisierung, lassen sich umfassende Expressionsprofile von differenziell exprimierten Genen beim Mammakarzinom darstellen.
Methode
Untersucht wurde die mRNA-Expression von 588 humanen Genen an Primärtumoren von insgesamt 16 Mammakarzinompatientinnen (T1 - 4, N0 - 1 M0 - 1).
Ergebnis
Der Vergleich verschiedener Tumorproben lässt erkennen, dass die Genexpressionsmuster von Mammakarzinomen sehr ähnlich sind und sich um ca. 1,5 % der analysierten Gene unterscheiden. Neben bereits beschriebenen Markern (z. B. ErbB2/neu) finden sich auch überexprimierte Genprodukte, über die bisher nur wenige Informationen beim Mammakarzinom vorliegen (z. B. Transkriptionsfaktor und Metalloproteinasen).
Schlußfolgerung
Durch die Analyse einer größeren Anzahl von Proben erhoffen wir uns Genexpressionsprofile zu identifizieren, welche mit dem Ansprechen auf eine mögliche medikamentöse Therapie korrelieren.
Abstract
Objective
Differentially expressed genes are potential prognostic factors in human breast cancer. cDNA-array hybridization permits rapids simultaneous analysis of differentially expressed genes.
Methods
We studied the mRNA expression of 588 genes with cDNA-array analysis in 16 primary breast carcinomas (T1 - 4, N0 - 1, M0 - 1).
Results
Approximately 1.5 % of the analyzed genes showed significant differences in expression. Differentially expressed genes included c-erbB2 (HER2/neu), metalloproteinases, and newly identified transcripts. The expression of most genes did not seen to be altered significantly.
Conclusion
The cDNA-array hybridization technique is a powerful tool to identify differentially expressed genes in breast cancers. These gene profiles will be studied for their prognostic significance.
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Dr. med. Andre¿ Ahr
Universitäts-Frauenklinik
Theodor-Stern-Kai 7
60590 Frankfurt
Email: E-mail: Ahr@em.uni-frankfurt.de