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Articles by O Tanaka
Total Records ( 3 ) for O Tanaka
  H Kato , A Sato , H Fukuda , Y Kagami , H Udagawa , A Togo , N Ando , O Tanaka , M Shinoda , H Yamana and S. Ishikura

The study objective was to evaluate the efficacy and toxicity of chemoradiotherapy with 5-fluorouracil (5-FU) plus cisplatin in patients with Stage I esophageal squamous cell carcinoma (ESCC). The primary endpoint was proportion of complete response (%CR).


Patients with Stage I (T1N0M0) ESCC, aged 20–75 years, without indication of endoscopic mucosal resection were eligible. Treatment consisted of cisplatin 70 mg/m2 (day 1) and 5-FU 700 mg/m2/day (days 1–4) combined with 30 Gy radiotherapy (2 Gy/day, 5 days/week, days 1–21). The cycle was repeated twice with 1-week split. Salvage surgery was recommended for residual tumor or local recurrence.


From December 1997 to June 2000, 72 patients were enrolled. No ineligible patient or major protocol violation was observed. There were 63 CRs for %CR of 87.5% [95% confidence interval (CI): 77.6–94.1]. Six patients with residual tumor successfully underwent esophagectomy. There was no Grade 4 toxicity. Four-year survival proportion was 80.5% (95% CI: 71.3–89.7), and 4-year major relapse-free survival proportion was 68% (95% CI: 57.3–78.8) (mucosal recurrence removed by endoscopy was not counted as an event).


High CR proportion and survival proportion with mild toxicity suggest that this regimen could be considered as a candidate of new standard treatment to be compared with surgery in patients with Stage I ESCC.

  M Zhou , H. J He , M Hirano , M Sekiguchi , O Tanaka , K Kawahara and H. Abe

ATP-sensitive K+ (KATP) channel subunits were investigated in rat submandibular gland (SMG). RT-PCR detected the presence of mRNA transcripts of the Kir6.1, Kir6.2, SUR2A, and SUR2B in the SMG, whereas SUR1 mRNA was barely detected. Western blot analysis provided the evidence that these four KATP channel subunits are expressed in rat SMG. Immunostaining detected that these four KATP channel subunits are widely distributed, with different intensities, in myoepithelial cells, epithelial cells of intercalated ducts, granular convoluted tubules, striated ducts, and excretory ducts. Immunofluorescence double staining showed that Kir6.1 and Kir6.2 colocalized with SUR2A in the myoepithelial cells, granular convoluted tubules, striated ducts, and excretory ducts. Kir6.1 and Kir6.2 also colocalized with SUR2B, mainly in the duct system, e.g., the granular convoluted tubules, striated ducts, and excretory ducts. Taken together, these results indicate that the KATP channels in SMG may consist of Kir6.1, Kir6.2, SUR2A, and SUR2B, with various combinations of colocalization with each other, and may play important roles in rat SMG during salivary secretion. (J Histochem Cytochem 58:499–507, 2010)

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