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Radiation therapy induces double-stranded DNA breaks in tumor cells, which leads to their death. A fraction of glioblastoma cells repair such breaks and reinitiate tumor growth. It was necessary to identify the relationship between high radiation doses and the proliferative activity of glioblastoma cells, and to evaluate the contribution of DNA repair pathways, homologous recombination (HR), and nonhomologous end joining (NHEJ) to tumor-cell recovery.
View Article and Find Full Text PDFBackground The aim of the project was to show the peculiarities of manipulations in two-dimensional (2D) visualization and to enlighten young neurosurgical residents for further independent training of their manual skills in the anatomic lab. The course followed a step-by-step training program starting with artificial models in a static 2D exoscopic view field with subsequent transition to cadaveric animal models and the use of dynamic four-hand techniques and endoscopy. Materials and methods Since 2015, two 2-day workshops and four 1-day workshops have been organized.
View Article and Find Full Text PDFGene expression patterns in ependymomas correlate with tumor location, grade, and patient age.
Am J Pathol
November 2003
Department of Neuropathology, Neurosurgical Nikolai Nilovich Burdenko Institute, Moscow, Russia.
To elucidate the molecular events responsible for tumorigenesis and progression of ependymomas, we analyzed molecular alterations on the gene expression level in a series of newly diagnosed ependymal neoplasms (n = 39). To this aim, tumor RNA was hybridized to microarrays comprising 2600 different genes with relevance to mitosis, cell-cycle control, oncogenesis, or apoptosis. For CLU, IGF-2, and RAF-1, which are apparent candidate genes because they had been previously described to be involved in tumorigenesis of other human malignancies, we found a high expression on the mRNA as well as the protein level.
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