Masanori Someya

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BACKGROUND Poly (ADP-ribose) polymerase-1 (PARP-1) is a key enzyme involved in the repair of radiation-induced single-strand DNA breaks. PARP inhibitors such as olaparib (KU-0059436, AZD-2281) enhance tumor sensitivity to radiation and to topoisomerase I inhibitors like camptothecin (CPT). Olaparib is an orally bioavailable inhibitor of PARP-1 and PARP-2(More)
The DNA double-strand breaks (DSBs) repair pathway has been implicated in maintaining genomic integrity via suppression of chromosomal rearrangements. DNA-dependent protein kinase (DNA-PK) has an important role with DNA DSBs repair. In this study, 93 of untreated cancer patients and 41 of cancer-free healthy volunteers were enrolled. Peripheral blood was(More)
In patients undergoing radiotherapy for localized prostate cancer, dose-volume histograms and clinical variables were examined to search for correlations between radiation treatment planning parameters and late rectal bleeding. We analyzed 129 patients with localized prostate cancer who were managed from 2002 to 2010 at our institution. They were treated(More)
BACKGROUND Nasal NK/T cell lymphoma is an aggressive disease and has a poor prognosis. Nasal NK/T cell lymphoma is refractory to conventional chemotherapy and has strong tendency of widespread relapse or dissemination into distant sites. METHODS We immunohistochemically studied nasal NK/T-cell lymphoma to elucidate the unique characteristics of nasal(More)
We report our experiences of four cases with meningeal hemangiopericytoma treated with surgery and postoperative radiotherapy and survey the literature to elucidate the efficacy of radiotherapy. Patients were treated with surgical resection and 46-52 Gy postoperative radiotherapy. Three patients had local control for 30, 54 and 138 months, respectively and(More)
BACKGROUND Repair of various types of DNA damages is critical for genomic stability. DNA-dependent protein kinase (DNA-PK) has an important role in DNA double-strand break repair. We examined whether there may be a correlation between DNA-PK activity in peripheral blood lymphocytes (PBLs) and survival percentages in various cancer patients. We also(More)
1 DNA-PK/Gene expression/Hypoxia/Reoxygenation. In order to elucidate the mechanism of concerted expression of various proteins related to DNA-PK activity, we examined the relationship of the expression of these proteins with that of a transcription factor Sp1. We also explored whether the expression of genes related to DNA-PK activity and Sp1 changed after(More)
This study investigated the maximum tolerated dose (MTD) of S-1 with concurrent radiotherapy in patients with head and neck cancer, based on the frequency of dose-limiting toxicities (DLT). S-1 was administered orally at escalating doses from 40 mg/m(2) b.i.d. on the days of delivering radiotherapy, which was given at a total dose of 64-70 Gy in 32-35(More)
PURPOSE Accurate analysis of the correlation between deformation of the prostate and displacement of its center of gravity (CoG) is important for efficient radiation therapy for prostate cancer. In this study, we addressed this problem by introducing a new analysis approach. METHOD A planning computed tomography (CT) scan and 7 repeat cone-beam CT scans(More)
Following the publication of the article 'The enhanced expression of the matrix metalloproteinase 9 in nasal NK/ T-cell lymphoma. BMC Cancer 2007, 7:229' [1], the submitting author became aware that a co-author had been omitted from the publication. Therefore, this article has been submitted as a correction to the original text, and highlights the(More)
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