Details of a Researcher - Oya, Mototsugu

Papers - Oya, Mototsugu

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予防医学的側面からみた勃起障害の検討

Marumo Ken, Horiguchi Yutaka, Nakagawa Ken, Ooya Mototsugu, Oohigashi Takashi, Nakashima Jun, Murai Masaru

腎泌尿器疾患予防医学会雑誌 11 ( 1 ) 59-60 2003

Research paper (scientific journal), Joint Work

Enhancement of diethylstilbestrol induced cytotoxicity by bcl-2 antisense oligodeoxynucleotides and a glutathione depletor for prostate cancer

Kikuchi Eiji, Nakashima Jun, Horiguchi Yutaka, Oya Mototsugu, Ohigashi Takashi, Murai Masaru

Journal of urology 169 730-734 2003

Research paper (scientific journal), Joint Work

Increased nuclear factor-kB activation is related to the tumor development of renal cell carcinoma

Oya Mototsugu, Takayanagi Atushi, Horiguchi Akio, Mizuno M, Ohtsubo Masafumi, Marumo Ken, Shimizu Nobuyoshi, Murai Masaru

Carcinogenesis 24 377-384 2003

Research paper (scientific journal), Joint Work

Increased activation of CCAAT/enhancer binding protein-b correlates with the invasiveness of renal cell carcinoma

Oya Mototsugu, Horiguchi Akio, Mizuno M, Marumo Ken, Murai Masaru

Clinical cancer research 9 1021-1027 2003

Research paper (scientific journal), Joint Work

Elevated AKT activation and its impact on clinicopathological features of renal cell carcinoma

Horiguchi Akio, Oya Mototsugu, Shimada T, Uchida Atsushi, Marumo Ken, Murai Masaru

Journal of urology 169 710-713 2003

Research paper (scientific journal), Joint Work

泌尿器科領域における薬の使い方

Ooya Mototsugu, Murai Masaru

腎腫瘍　クリニカ 30 36-39 2003

Research paper (scientific journal), Joint Work

What is the impact of cytoreductive nephrectomy in patients with metastatic renal cell carcinoma?

Oya Mototsugu, Murai Masaru

Japanese Journal of Cancer and Chemotherapy 29 ( 10 ) 1732 - 1737 2002.10

ISSN 0385-0684

The impact of cytoreductive nephrectomy in patients with metastatic renal cell carcinoma (RCC) is discussed herein with consideration of prolonged survival and quality of life. A nephrectomy can be indicated in a patient with good performance status and pulmonary metastases when adjuvant immunotherapy is an option. In contrast, in a patient with poor performance status and/or metastases including multiple organs, a nephrectomy is not indicated. To relieve symptoms, options other than nephrectomy should be considered.

Clinical value of prostate specific antigen based parameters for the detection of prostate cancer on repeat biopsy

Horinaga Minoru, Nakashima Jun, Ishibashi Midori, Oya Mototsugu, Ohigashi Takashi, Marumo Ken, Murai Masaru

Journal of Urology 168 ( 3 ) 986 - 990 2002.09

ISSN 0022-5347

Purpose: To our knowledge the indications for repeat prostate needle biopsy in men whose previous transrectal ultrasound guided biopsy results revealed no evidence of cancer have not yet been defined. We identified the most effective method for detecting prostate cancer on repeat biopsy. Materials and Methods: One or more systematic repeat prostate biopsies were performed in 144 consecutive patients, including 86 with prostate specific antigen (PSA) levels between 4 and 10 ng./ml. at repeat biopsy. Men in whom cancer was detected on repeat biopsies were compared with their counterparts in terms of digital rectal examination findings, PSA based parameters and an atypical prostate on initial prostate biopsy. Results: Prostate cancer was detected on repeat biopsy in 39 of the 144 patients and in 19 on subset analysis of 86. Serum PSA levels at repeat biopsy did not differ significantly in patients with and without prostate cancer. According to receiver operating characteristics analysis the α1-antichymotrypsin-PSA complex adjusted for transition zone volume had the greatest area under the curve values, that is 0.756 for all 144 patients and 0.768 for the subset analysis of 86. Multiple logistic regression analysis of the subset of 86 patients showed that α1-antichymotrypsin-PSA complex adjusted for transition zone volume was the only significant independent predictor of cancer. Conclusions: α1-Antichymotrypsin-PSA complex adjusted for transition zone volume was the most powerful predictor of cancer in men who had undergone previous negative prostate biopsies. This parameter may be used to avoid more unnecessary repeat biopsies with an acceptable decrease in sensitivity.

STAT3, but not ERKs, mediates the IL-6-induced proliferation of renal cancer cells, ACHN and 769P

Horiguchi Akio, Oya Mototsugu, Marumo Ken, Murai Masaru

Kidney International 61 ( 3 ) 926-938 2002.03

Research paper (scientific journal), Joint Work

顕微鏡的血尿患者における単純性腎嚢胞の頻度と経時的変化

Marumo Ken，Horiguchi Yutaka，Nakagawa Ken，Ooya Mototsugu，Asakura Hirotaka，Oohigashi Takashi，Nakashima Jun，Marumo Ken，Murai Masaru

日本腎泌尿器疾患予防医学研究会誌 10 ( 1 ) 26-27 2002.01

Research paper (scientific journal), Joint Work

Significance and diagnostic accuracy of renal calculi found by ultrasonography in patients with asymptomatic microscopic hematuria

Marumo Ken, Horiguchi Yutaka, Nakagawa Ken, Oya Mototsugu, Ohigashi Takashi, Asakura Hirotaka, Nakashima Jun, Murai Masaru

International Journal of Urology 9 ( 7 ) 363 - 367 2002

ISSN 0919-8172

Background: The purpose of the present study was to evaluate the clinical significance and the accuracy of the diagnosis of renal calculi incidentally found by ultrasonography (US). Methods: A total of 906 subjects (639 men and 267 women) aged 18-78 years were referred for asymptomatic microscopic hematuria. Of these, 743 patients who underwent US were studied. Results: Hyperechogenic spots in the central echo complex suggesting renal calculi were noted in 195 patients (21.5%). The occurrence of hyperechogenic spots was higher in patients with 20 or more urinary red blood cells per high-power field (χ² = 4.896, P = 0.0269) and in men than in women (χ² = 7.101, P = 0.0077), but it was lowest in patients who were 29 years old or younger. Of these 195 patients, who were followed up for 1-161 months (average: 33.5 months), 24 patients (12.3%) needed urological management. Extracorporeal shockwave lithotripsy was carried out in eight patients, transureteral lithotripsy was carried out in three patients, spontaneous passage occurred in 11 patients and medication for hyperuricemia was initiated in two patients (1%). Among the patients in whom hyperechogenic spots were found in the kidney by US but calculi were not visible on abdominal plain radiographs, 39 patients underwent computed tomography. Of them, 31 patients were confirmed to have renal calculi. Conclusion: The obtained results suggest that US is an effective and reliable means of detecting renal calculi in patients with asymptomatic microscopic hematuria, and in facilitating prompt urological intervention or predicting the natural course of renal calculi.

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Significance and diagnostic accuracy of renal calculi found by ultrasonography in patients with asymptomatic microscopic hematuria

Marumo Ken, Horiguchi Yutaka, Nakagawa Ken, Oya Mototsugu, Ohigashi Takashi, Asakura Hirotak, Nakashima Jun, Murai Masaru

International journal of urology 9 363-367 2002

Research paper (scientific journal), Joint Work

直腸癌S状結腸癌に対する根治的手術後の勃起障害の臨床的検討

Marumo Ken, Horiguchi Yutaka, Nakagawa Ken, Ooya Mototsugu, Oohigashi Takashi, Nakashima Jun, Murai Masaru

日本性機能学会雑誌 17 ( 3 ) 219-223 2002

Research paper (scientific journal), Joint Work

Activation of signal transducer and activator of transcription 3 in renal cell carcinoma: a study of incidence and its association with pathological features and clinical outcome

Horiguchi Akio, Oya Mototsugu, Shimada T, Uchida Atsushi, Marumo Ken, Murai Masaru

Journal of urology 168 762-765 2002

Research paper (scientific journal), Joint Work

腎摘除術・腎部分摘除術・腎尿管全摘術

Ooya Mototsugu

臨床泌尿器科 56 255-259 2002

Research paper (scientific journal), Single Work

腎実質の縫合

Ooya Mototsugu

臨床泌尿器科 56 855-860 2002

Research paper (scientific journal), Single Work

転移巣を有する腎細胞癌患者における腎摘出術の意義

Ooya Mototsugu, Murai Masaru

癌と化学療法 29 1732-1737 2002

Research paper (scientific journal), Joint Work

泌尿器科領域における最近の医療機器

Ooya Mototsugu, Mizuno Ryuuichi, Kanao Kento, Murai Masaru

学会新報 23 6-12 2002

Research paper (scientific journal), Joint Work

Clinical value of prostate specific antigen based parameters for the detection of prostate cancer on repeat biopsy: The usefulness of complexed prostate specific antigen adjusted for transition zone volume

Horinaga Minoru, Nakashima Jun, Ishibashi Midori, Oya Mototsugu, Ohigashi Takashi, Marumo Ken, Murai Masaru

Journal of urology 168 986-990 2002

Research paper (scientific journal), Joint Work

STAT3, but not ERKs, mediates the IL-6-induced proliferation of renal cancer cells, ACHN and 769P

Horiguchi Akio, Oya Mototsugu, Marumo Ken, Murai Masaru

Kidney International 61 ( 3 ) 926 - 938 2002

ISSN 0085-2538

Background. Although interleukin-6 (IL-6) has been suggested to function as an autocrine growth factor in renal cell carcinoma (RCC), the underlying mechanism responsible for the IL-6-induced proliferation of RCC has not been defined. The aim of this study was to characterize the signaling cascades mediating IL-6-induced proliferation and to investigate the use of effective novel interventions to block the IL-6-induced autocrine growth of renal cancer cells. Methods. IL-6-induced proliferation and intracellular signaling cascades were analyzed in four human renal cancer cell lines Caki-1, ACHN, 769P and A498. IL-6-induced activation of STAT3 (signal transducer and activator of transcription-1) and extracellular signal-regulated kinases (ERKs), and the effects of anti-IL-6 neutralizing antibody, Jak inhibitor AG 490, and MEK1 inhibitor PD 98059 were analyzed by Western blotting using phospho-specific antibodies. The DNA-binding activities of STATs were analyzed by EMSA. Apoptosis was determined by using nuclear staining and the TUNEL assay. Changes in the apoptosis-related proteins, bcl-2, bcl-xL, and bax were analyzed by Western blotting. Results. IL-6 induced tyrosine phosphorylation and increased the DNA binding activity of STAT3 and, to a lesser extent, STAT1 in all cell lines except for Caki-1, which did not express the IL-6 receptor subunit gp130. ERKs were constitutively activated in all cell lines and the activation level was not up-regulated further by exogenously added IL-6 nor down-regulated by anti-IL-6 neutralizing antibody. IL-6-induced STAT3 tyrosine phosphorylation and DNA binding activity was inhibited by treatment with Jak specific inhibitor AG 490; however, it was not affected by the MEK1 inhibitor PD 98059. Moreover, treatment with AG 490 inhibited IL-6-induced proliferation of ACHN and 769P cells and induced apoptosis with the down-regulation of bcl-2 and the up-regulation of bax. Conclusions. This study identified STAT3, but not ERKs, to be a major mediator of IL-6-induced proliferation of renal cancer cells. Although ERKs were constitutively activated, ERKs were not found to be essential for the IL-6-induced proliferation and modulation of the STAT3 activity. Because the Jak specific inhibitor AG 490 effectively inhibited the IL-6-induced STAT3 activity and induced apoptosis, the blockade of the STAT3 signaling pathways is considered to be potentially useful as a novel therapeutic approach for RCC.

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