Browsing by Author "Turhal, Nazi Serdar"

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    Prevalence of K-Ras mutations in hepatocellular carcinoma: A Turkish Oncology Group pilot study
    (SPANDIDOS PUBL LTD, 2015-01-01) Turhal, Nazi Serdar; Savas, Berna; Coskun, Oznur; Bas, Emine; Karabulut, Bulent; Nart, Deniz; Korkmaz, Taner; Yavuzer, Dilek; Demir, Gokhan; Dogusoy, Gulen; Artac, Mehmet
    Hepatocellular carcinoma (HCC) is the fifth most common male-predominant type of cancer worldwide. There is no effective treatment regimen available for advanced-stage disease and chemotherapy is generally ineffective in these patients. The number of studies on the prevalence of K-Ras mutations in HCC patients is currently limited. A total of 58 patients from 6 comprehensive cancer centers in 4 metropolitan cities of Turkey were enrolled in this study. Each center committed to enroll approximately 10 random patients whose formalin-fixed paraffin-embedded tumor tissues were available for K-Ras, exon 2 genotyping. Two methods were applied based on the availability of adequate amounts of tumor DNA. In the first method, the samples were processed using TheraScreen. The genomic DNA was further used to detect the 7 most frequent somatic mutations (35G>A