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排序方式: 共有182条查询结果,搜索用时 31 毫秒
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Validation of the nomogram for predicting 90‐day mortality after radical cystectomy in a Japanese cohort 下载免费PDF全文
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Daisuke Nakano Kent Doi Hiroaki Kitamura Takashige Kuwabara Kiyoshi Mori Masashi Mukoyama Akira Nishiyama 《Journal of the American Society of Nephrology : JASN》2015,26(12):3035-3044
Urine output is widely used as a criterion for the diagnosis of AKI. Although several potential mechanisms of septic AKI have been identified, regulation of urine flow after glomerular filtration has not been evaluated. This study evaluated changes in urine flow in mice with septic AKI. The intratubular urine flow rate was monitored in real time by intravital imaging using two-photon laser microscopy. The tubular flow rate, as measured by freely filtered dye (FITC-inulin or Lucifer yellow), time-dependently declined after LPS injection. At 2 hours, the tubular flow rate was slower in mice injected with LPS than in mice injected with saline, whereas BP and GFR were similar in the two groups. Importantly, fluorophore-conjugated LPS selectively accumulated in the proximal tubules that showed reduced tubular flow at 2 hours and luminal obstruction with cell swelling at 24 hours. Delipidation of LPS or deletion of Toll-like receptor 4 in mice abolished these effects, whereas neutralization of TNF-α had little effect on LPS-induced tubular flow retention. Rapid intravenous fluid resuscitation within 6 hours improved the tubular flow rate only when accompanied by the dilation of obstructed proximal tubules with accumulated LPS. These findings suggest that LPS reduces the intratubular urine flow rate during early phases of endotoxemia through a Toll-like receptor 4–dependent mechanism, and that the efficacy of fluid resuscitation may depend on the response of tubules with LPS accumulation. 相似文献
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Prognostic factors and risk classifications for patients with metastatic renal cell carcinoma 下载免费PDF全文
The introduction of molecular‐targeted therapy has made dramatical changes to treatment for metastatic renal cell carcinoma. Currently, there are four vascular endothelial growth factor receptor‐tyrosine kinase inhibitors and two mammalian target of rapamycin inhibitors in Japan. For the appropriate clinical use of these molecular‐targeted drugs, the identification of prognostic and/or predictive factors in patients who received these drugs is required. Although molecular biological and genetic factors that determine the prognosis of patients with metastatic renal cell carcinoma have been reported, most of these factors are problematic in that the number of patients analyzed was small. In contrast, clinicopathological prognostic factors, including the practice of cytoreductive nephrectomy, pathological findings, metastatic sites and metastasectomy, and abnormal inflammatory response, have been identified by analyzing a relatively large number of patients. Several prognostic classification models that were developed by combining these clinicopathological factors are widely used in not only clinical trials, but also routine clinical practice. However, the quality of these prognostic models is considered to be insufficient regarding prognostic prediction of metastatic renal cell carcinoma patients and, thus, requires further improvements. Recently, basic and clinical studies have been extensively carried out for the identification of promising informative markers and for understanding molecular mechanisms of resistance to molecular‐targeted drugs in metastatic renal cell carcinoma patients. The present review considers ongoing translational research efforts on clinicopathological, molecular biological, and genetic prognostic and/or predictive factors for metastatic renal cell carcinoma patients in the era of molecular‐targeted therapy, and discusses the clinical implications of these findings. 相似文献
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Editorial Comment from Dr Abe to Comparative impact of continent and incontinent urinary diversion on long‐term renal function after radical cystectomy in patients with preoperative chronic kidney disease 2 and chronic kidney disease 3a 下载免费PDF全文
Takashige Abe 《International journal of urology》2015,22(7):656-656
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Adaptor protein CRK induces epithelial–mesenchymal transition and metastasis of bladder cancer cells through HGF/c‐Met feedback loop 下载免费PDF全文
Ryuji Matsumoto Masumi Tsuda Lei Wang Nako Maishi Takashige Abe Taichi Kimura Mishie Tanino Hiroshi Nishihara Kyoko Hida Yusuke Ohba Nobuo Shinohara Katsuya Nonomura Shinya Tanaka 《Cancer science》2015,106(6):709-717
We have previously reported that an adaptor protein CRK, including CRK‐I and CRK‐II, plays essential roles in the malignant potential of various aggressive human cancers, suggesting the validity of targeting CRK in molecular targeted therapy of a wide range of cancers. Nevertheless, the role of CRK in human bladder cancer with marked invasion, characterized by distant metastasis and poor prognosis, remains obscure. In the present study, immunohistochemistry indicated a striking enhancement of CRK‐I/‐II, but not CRK‐like, in human bladder cancer tissues compared to normal urothelium. We established CRK‐knockdown bladder cancer cells using 5637 and UM‐UC‐3, which showed a significant decline in cell migration, invasion, and proliferation. It is noteworthy that an elimination of CRK conferred suppressed phosphorylation of c‐Met and the downstream scaffold protein Gab1 in a hepatocyte growth factor‐dependent and ‐independent manner. In epithelial–mesenchymal transition‐related molecules, E‐cadherin was upregulated by CRK elimination, whereas N‐cadherin, vimentin, and Zeb1 were downregulated. A similar effect was observed following treatment with c‐Met inhibitor SU11274. Depletion of CRK significantly decreased cell proliferation of 5637 and UM‐UC‐3, consistent with reduced activity of ERK. An orthotopic xenograft model with bioluminescent imaging revealed that CRK knockdown significantly attenuated not only tumor volume but also the number of circulating tumor cells, resulted in a complete abrogation of metastasis. Taken together, this evidence uncovered essential roles of CRK in invasive bladder cancer through the hepatocyte growth factor/c‐Met/CRK feedback loop for epithelial–mesenchymal transition induction. Thus, CRK might be a potent molecular target in bladder cancer, particularly for preventing metastasis, leading to the resolution of clinically longstanding critical issues. 相似文献
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Takashi Kitagataya Goki Suda Kazunori Nagashima Takehiko Katsurada Koji Yamamoto Megumi Kimura Osamu Maehara Ren Yamada Taku Shigesawa Kazuharu Suzuki Akihisa Nakamura Masatsugu Ohara Machiko Umemura Naoki Kawagishi Masato Nakai Takuya Sho Mitsuteru Natsuizaka Kenichi Morikawa Koji Ogawa Shunsuke Ohnishi Yoshito Komatsu Hiroo Hata Satoshi Takeuchi Takashige Abe Jun Sakakibara-Konishi Takanori Teshima Akihiro Homma Naoya Sakamoto 《Journal of gastroenterology and hepatology》2020,35(10):1782-1788
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Nobuo Shinohara Takashige Abe Tango Mochizuki Akira Kashiwagi Kouichi Kanagawa Satoru Maruyama Ataru Sazawa Koji Oba Katsuya Nonomura 《Urologic oncology》2013,31(7):1276-1282
ObjectivesWe investigated the prognosis of Japanese patients with metastatic renal cell carcinoma (RCC), and analyzed the validity of Memorial Sloan-Kettering Cancer Center (MSKCC) risk classification.Materials and methodsThe endpoint of the present study was overall survival. Relationships between overall survival and potential prognostic factors were assessed using the Cox proportional hazard model with a step-wise procedure. Prognostic assessment was also performed according to the MSKCC risk classification. The predictive accuracy of the MSKCC risk classification was measured employing the concordance index.ResultsThe median survival for all patients was 22 months (95% CI, 19–28 months). The eight factors were identified as independent prognostic factor; time from initial diagnosis to metastasis, low hemoglobin (Hb), lactate dehydrogenase (LDH), corrected serum calcium (cCa), C-reactive protein (CRP), and the presence or absence of liver metastasis, bone metastasis, and lymph node metastasis. When the MSKCC risk classification was applied to patients, the median overall survival was not reached and 26 and 10 months in the patients classified as favorable, intermediate, and poor risk, respectively. The c-index was 0.73.ConclusionsThe prognosis of Japanese metastatic renal cell carcinoma patients may be better than that of previous studies from North America or Europe. Although there are some differences in the rate of patients in the risk groups and survival time by risk group between these patients, the MSKCC risk classification may be applicable for Japanese patients with metastatic renal cell carcinoma. 相似文献