Naohiko Okamoto

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OBJECTIVE Although hypercalciuria, a well-established adverse effect of vitamin D3, can be a risk factor of renal stone formation, the risk of nephrolithiasis has not been well defined. The consumption of a diet high in acid precursors is often cited as a risk factor for the development of calcium-based kidney stones. In the present study, we investigated(More)
Background. Most patients with metastatic prostate cancer are endocrinologically treated with LHRH agonist, but finally castration-refractory and hormone-refractory cancers occur. Serum testosterone levels get low to "the castration level" by LHRH agonists but may not get low enough against castration-refractory prostate cancer. Methods. As case series,(More)
PURPOSE Urinary citrate is a potent inhibitor of renal stone formation. Its excretion is regulated by Na(+)/dicarboxylate cotransporter-1 (NaDC-1), which is expressed on the apical membrane of renal proximal tubules. Many patients with calcium urolithiasis exhibit hypocitraturia, however, the mechanisms are not perfectly understood. We examined whether or(More)
OBJECTIVE The aim of this study was to evaluate the efficacy and toxicity of a new combination chemotherapy of docetaxel, ifosfamide and cisplatin (DIP) in the treatment of metastatic urothelial cancer. METHODS Fourteen patients (nine male and five female; aged 59-82 years) with metastatic urothelial carcinoma, including five patients who have a history(More)
Hemorrhagic cystitis is a disorder which causes bleeding from diffusely inflammatory bladder mucosa. Here we present a case of severe hemorrhagic cystitis caused by melphalan. A 70-year-old man with multiple myeloma was presented with suddenly commenced massive gross hematuria. During an attempt of transurethral coagulation of bladder mucosa, bladder(More)
Considering the similarity between structural, hemodynamic, and functional changes of obesity-related renal disease and diabetic nephropathy, we hypothesized that renal glucose transporter changes occur in obesity as in diabetes. The aim of the work was to evaluate GLUT1 and GLUT2 in kidneys of an animal model of metabolic syndrome. Neonate spontaneously(More)
Transurethral resection of the prostate is the gold standard of surgical treatment for benign prostatic hyperplasia (BPH). Nevertheless, open subcapsular prostatectomy is still performed for large BPH. While enucleation of prostatic adenoma is being performed, unneglectable bleeding can occur and surgeons need to rush to remove adenomas, often using fingers(More)
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