Hiroshi C Watanabe

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The freshwater cnidarian Hydra was first described in 1702 and has been the object of study for 300 years. Experimental studies of Hydra between 1736 and 1744 culminated in the discovery of asexual reproduction of an animal by budding, the first description of regeneration in an animal, and successful transplantation of tissue between animals. Today, Hydra(More)
A laccase (EC 1.10.3.2) was isolated from the culture filtrate of Lentinula edodes. The enzyme was purified to a homogeneous preparation using hydrophobic, anion-exchange, and size-exclusion chromatographies. SDS-PAGE analysis showed the purified laccase, Lcc 1, to be a monomeric protein of 72.2 kDa. The enzyme had an isoelectric point of around pH 3.0. The(More)
PURPOSE Amrubicin, a new anthracycline agent, and topotecan are both active for previously treated small-cell lung cancer (SCLC). No comparative study of these agents has been reported. This randomized phase II study was conducted to select amrubicin or topotecan for future evaluation. PATIENTS AND METHODS Patients with SCLC previously treated with(More)
An autopsy case of a 52-year-old man suffering from chronic manganese poisoning (CMP) is reported with determination of the manganese distribution in the brain. The patient had been working in a manganese ore crushing plant since 1965. In 1967 he began to complain of difficulties in walking and diminished libido. Later, he developed various(More)
The genetic polymorphisms of aldehyde dehydrogenase-2 (ALDH2), alcohol dehydrogenase-1B (ADH1B, previously called ADH2), and ADH1C (previously called ADH3) affect the metabolism of alcohol. The inactive ALDH2 encoded by ALDH2*1/*2 and the less-active ADH1B encoded by ADH1B*1/*1 increase the risk of esophageal squamous cell carcinoma in East Asian drinkers.(More)
Wnt genes and beta-catenin signaling are involved in axial patterning processes in vertebrate embryogenesis in setting up the Spemann-Mangold organizer in amphibian embryos. An organizer with a similar function is present in the hypostome of an adult Hydra polyp. Previously, a Hydra ortholog of Wnt3 (HyWnt3), which is expressed in the hypostome, has been(More)
PURPOSE We performed a multicenter randomized controlled trial to determine whether postoperative adjuvant chemotherapy improves outcome in patients with esophageal squamous cell carcinoma undergoing radical surgery. PATIENTS AND METHODS Patients undergoing transthoracic esophagectomy with lymphadenectomy between July 1992 and January 1997 at 17(More)
PURPOSE This study was undertaken to investigate the efficacy and the feasibility of gefitinib for chemotherapy-naïve patients with advanced non-small-cell lung cancer (NSCLC) harboring epidermal growth factor receptor (EGFR) mutations. PATIENTS AND METHODS The EGFR gene status in various tumor samples obtained from chemotherapy-naïve advanced NSCLC(More)
Mammalian cells acquire cholesterol mainly from LDL. LDL enter the endosomes, allowing cholesteryl esters to be hydrolyzed by acid lipase. The hydrolyzed cholesterol (LDL-CHOL) enters the Niemann-Pick type C1 (NPC1)-containing endosomal compartment en route to various destinations. Whether the Golgi is involved in LDL-CHOL transport downstream of the NPC1(More)