151
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Johzaki T, Nagatomo H, Sakagami H, Sentoku Y, Nakamura T, Mima K, Nakao Y, Yokota T. Core heating analysis of fast ignition targets by integrated simulations. ACTA ACUST UNITED AC 2006. [DOI: 10.1051/jp4:2006133077] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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152
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Kim Y, Choi W, Lee KM, Park JH, Massie ST, Sasano Y, Nakajima H, Yokota T. Polar stratospheric clouds observed by the ILAS-II in the Antarctic region: Dual compositions and variation of compositions during June to August of 2003. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006445] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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153
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Wetzel G, Oelhaf H, Friedl-Vallon F, Kleinert A, Lengel A, Maucher G, Nordmeyer H, Ruhnke R, Nakajima H, Sasano Y, Sugita T, Yokota T. Intercomparison and validation of ILAS-II version 1.4 target parameters with MIPAS-B measurements. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006287] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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154
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Sugita T, Nakajima H, Yokota T, Kanzawa H, Gernandt H, Herber A, von der Gathen P, König-Langlo G, Sato K, Dorokhov V, Yushkov VA, Murayama Y, Yamamori M, Godin-Beekmann S, Goutail F, Roscoe HK, Deshler T, Yela M, Taalas P, Kyrö E, Oltmans SJ, Johnson BJ, Allaart M, Litynska Z, Klekociuk A, Andersen SB, Braathen GO, De Backer H, Randall CE, Bevilacqua RM, Taha G, Thomason LW, Irie H, Ejiri MK, Saitoh N, Tanaka T, Terao Y, Kobayashi H, Sasano Y. Ozone profiles in the high-latitude stratosphere and lower mesosphere measured by the Improved Limb Atmospheric Spectrometer (ILAS)-II: Comparison with other satellite sensors and ozonesondes. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006439] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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155
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Irie H, Sugita T, Nakajima H, Yokota T, Oelhaf H, Wetzel G, Toon GC, Sen B, Santee ML, Terao Y, Saitoh N, Ejiri MK, Tanaka T, Kondo Y, Kanzawa H, Kobayashi H, Sasano Y. Validation of stratospheric nitric acid profiles observed by Improved Limb Atmospheric Spectrometer (ILAS)–II. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006115] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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156
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Nakajima H, Sugita T, Yokota T, Ishigaki T, Mogi Y, Araki N, Waragai K, Kimura N, Iwazawa T, Kuze A, Tanii J, Kawasaki H, Horikawa M, Togami T, Uemura N, Kobayashi H, Sasano Y. Characteristics and performance of the Improved Limb Atmospheric Spectrometer-II (ILAS-II) on board the ADEOS-II satellite. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006334] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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157
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Hata E, Ikeda S, Kawano R, Yokota T, Matsukawa S, Tamaki K, Karita S. P-873 ND3 operation for lung cancer. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)81366-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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158
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Yokota T. P-934 Surgical treatment of adrenal metastasis from non-small cell lungcancer. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)81427-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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159
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Toru S, Yokota T, Tomimitsu H, Kanouchi T, Yamada M, Mizusawa H. Somatosensory-evoked cortical potential during attacks of paroxysmal dysesthesia in multiple sclerosis. Eur J Neurol 2005; 12:233-4. [PMID: 15693815 DOI: 10.1111/j.1468-1331.2004.00831.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Paroxysmal dysesthesia is considered to be one of the characteristic symptoms of multiple sclerosis (MS), but the lesion responsible and the pathophysiology of this dysesthesia are not known. We report the interesting finding of somatosensory-evoked potentials (SEPs) in a patient with MS during a paroxysmal dysesthesia attack.
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Affiliation(s)
- S Toru
- Department of Neurology, Tokyo Medical and Dental University, Tokyo, Japan
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160
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Koarashi J, Akiyama K, Asano T, Yokota T. Incorporating tritiated water into a 14C-sampling system for quantitative estimation of 14C activity in airborne effluent. J Radioanal Nucl Chem 2005. [DOI: 10.1007/s10967-005-0508-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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161
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Yamamoto S, Fukui D, Yokota T, Hikita M, Ishikawa Y, Shibahara T, Kadota K. Pathological study of naturally occurring adenocarcinomas demonstrating differentiation in ducks. Avian Pathol 2004; 33:581-5. [PMID: 15763726 DOI: 10.1080/03079450400013238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Case 1, a mucinous adenocarcinoma, was in the pancreas of a 5-year-old male mandarin duck. The tumour comprised a single layer of duct-like structures with abundant fibrous stroma. The neoplastic cells produced a large amount of mucin, and dense or moderately dense mucin granules were observed ultrastructurally. Case 2 was a 1-year-old male mandarin duck, which had a type II pneumocytoid carcinoma within the thoracic air sacs. Light microscopy revealed papillary growths composed of stratified neoplastic epithelium. At the ultrastructural level, the tumour cells had osmiophilic lamellar granules in the cytoplasm. Case 3, a ciliated cell adenocarcinoma with squamous metaplasia, was detected in the right lung of a 2-year-old male domestic duck (Anas platyrhynchos forma domestica). The neoplasm consisted of tubular structures with areas of squamous differentiation in places. The presence of cilia was confirmed by electron microscopy. The three adenocarcinomas appeared high-grade or moderate-grade malignant tumours in some aspects, but showed granules or cilia that are suggestive of their origin. The presence of cells retaining the capacity for differentiating into well-differentiated cells may be characteristic of sporadically occurring avian adenocarcinomas.
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Affiliation(s)
- S Yamamoto
- Kushiro Livestock Hygiene Service Centre, 127 Otanoshike, Kushiro 084-0917, Japan
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162
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Yamamoto S, Yokota T, Fukui D, Shibahara T, Ishikawa Y, Kadota K. Foci of altered hepatocytes in a fox squirrel (Sciurus niger) with haemochromatosis. J Comp Pathol 2004; 131:237-41. [PMID: 15276864 DOI: 10.1016/j.jcpa.2004.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2003] [Accepted: 01/31/2004] [Indexed: 11/22/2022]
Abstract
Numerous minute milky white foci were distributed throughout the dark brown liver in an adult male fox squirrel. Histologically, the hepatic focal lesions were composed of large eosinophilic granular hepatocytes, which were mostly positive for glutathione S-transferase mu antigen and proliferating cell nuclear antigen. Electron microscopy demonstrated an increased number of mitochondria. These features corresponded to those in the eosinophilic type of foci of altered hepatocytes. Berlin blue stain showed severe haemosiderin deposition in hepatocytes, except in the focal lesions. Since the fox squirrel is known to be liable to develop congenital porphyria, it is suggested that the hepatic anomalies described may be closely associated with the development of porphyria.
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Affiliation(s)
- S Yamamoto
- Kushiro Livestock Hygiene Service Center, Kushiro 084-0917, Japan
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163
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Yokota T, Ishiyama S, Saito T, Teshima S, Narushima Y, Murata K, Iwamoto K, Yashima R, Yamauchi H, Kikuchi S. Lymph node metastasis as a significant prognostic factor in gastric cancer: a multiple logistic regression analysis. Scand J Gastroenterol 2004; 39:380-4. [PMID: 15125471 DOI: 10.1080/00365520310008629] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND In Japan, the standard treatment policy for all potentially curable patients with gastric cancer is radical resection including extensive lymphadenectomy. This treatment strategy has been used for both early and advanced gastric cancers, and substantial increases in survival time have been reported. In advanced gastric cancer, lymphatic spread is reported to be one of the most relevant prognostic factors for gastric cancer resected for cure. The purpose of this study was to determine the factors affecting lymph node involvement and to establish guidelines for the extent of lymph node dissection most appropriate for the treatment of gastric cancer. METHODS The clinicopathological features of 926 patients with gastric cancer were reviewed. Information on the clinicopathological features was obtained from the database of gastric cancer at the Department of Gastroenterological Surgery, Sendai National Hospital. Univariate and multivariate analyses of data for patients with gastric cancer tumors were performed to evaluate the prognostic significance of clinicopathological features. The independent risk factors influencing lymph node metastasis were determined by multiple logistic regression analysis. RESULTS The following clinicopathologic factors were found to be correlated with prognosis of gastric cancer: (1) macroscopic type, (2) depth of invasion, (3) cancer-stromal relationship, (4) histological growth pattern, (5) lymph node involvement, (6) lymphatic invasion, (7) vascular invasion and (8) tumor site. However, a multivariate analysis revealed that macroscopic type, depth of invasion, lymph node involvement and tumor site are independent risk factors for the prognosis of gastric cancer patients. Among these factors, the prognosis of patients with gastric cancer was most strongly influenced by lymph node involvement (odds ratio, 4.632). According to a multiple logistic regression model, depth of cancer invasion and lymphatic invasion was significantly correlated with lymph node metastases. CONCLUSIONS Lymph node involvement has the strongest influence on the prognosis of gastric cancer. Among the clinicopathological factors, depth of invasion and microscopically lymphatic invasion are important factors in predicting lymph node metastases. Thus, the ability to perform gastrectomy with dissection of lymph nodes is a basic requirement for gastric cancer surgeons.
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Affiliation(s)
- T Yokota
- Dept. of Gastroenterological Surgery, Sendai National Hospital, Sendai, Japan.
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164
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Yokota T, Shibahara T, Yamaguchi M, Jimma K, Ishikawa Y, Kadota K. Concurrent fatal listeriosis, zygomycosis and aspergillosis in a reindeer (Rangifer tarandus
) calf. Vet Rec 2004; 154:404-6. [PMID: 15083977 DOI: 10.1136/vr.154.13.404] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- T Yokota
- Rumoi Livestock Hygiene Service Centre, 6-1 Motomachi, Horonobe 098-3217, Japan
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165
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Shibahara T, Sato K, Kato M, Takeda A, Yokota T, Ishikawa Y, Kadota K. Acute haemorrhagic leucoencephalitis in a Californian sea lion (Zalophus californianus). Vet Rec 2004; 154:270-2. [PMID: 15029968 DOI: 10.1136/vr.154.9.270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- T Shibahara
- Hokkaido Research Station, National Institute of Animal Health, 4 Hitsujigaoka, Toyohira, Sapporo 062-0045, Japan
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166
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Koarashi J, Yokota T, Akiyama K, Asano T. Incorporating tritiated water into a 14C-sampling system for quantitative estimation of 14C activity in airborne effluent. J Radioanal Nucl Chem 2004. [DOI: 10.1007/s10967-004-0508-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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167
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Nishie W, Yokota K, Sawamura D, Sato-Matsumura K, Tanimura S, Osawa R, Kawashima T, Yokota T, Shimizu H. Detection of circulating lymphoma cells in subcutaneous panniculitis-like T-cell lymphoma. Br J Dermatol 2003; 149:1081-2. [PMID: 14632825 DOI: 10.1111/j.1365-2133.2003.05612.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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168
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Hata E, Ikeda S, Sakaguchi H, Kawano R, Yokota T, Takeuchi E, Fukai R. Propriety of surgical intervention with an aggressive approach to lymphadenectomy as the first treatment for N2/N3 left NSCLC. Lung Cancer 2003. [DOI: 10.1016/s0169-5002(03)92772-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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169
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Tanabe T, Maeda S, Miyauchi T, Iemitsu M, Takanashi M, Irukayama-Tomobe Y, Yokota T, Ohmori H, Matsuda M. Exercise training improves ageing-induced decrease in eNOS expression of the aorta. Acta Physiol Scand 2003; 178:3-10. [PMID: 12713509 DOI: 10.1046/j.1365-201x.2003.01100.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS Ageing impairs endothelial function such as the regulation of vascular tone. The release of nitric oxide (NO), which has a potent vasodilator effect and antiatherosclerotic property, is decreased in the aorta of aged rats. Exercise training, however, has been reported to increase the expression of endothelial NO synthase (eNOS) in the aorta of young rats. In aged rats, it is not known whether the expression of eNOS is altered by exercise training. We hypothesized that exercise training would improve the ageing-induced decrease in eNOS expression in vessels, and examined the messenger RNA (mRNA) and protein expression of eNOS in the aorta of sedentary-young rats (sedentary-young group; 4 months old), sedentary-aged rats (sedentary-aged group; 23 months old), and swim-trained aged rats (training-aged group; 23 months old, swimming training for 8 weeks, 5 days week(-1), 90 min day(-1)). RESULTS Body weight was significantly lower, and citrate synthase activity in the epitrochlearis muscle was significantly higher in the training-aged group compared with the sedentary-aged group. The mRNA expression of eNOS in the aorta was significantly higher in the training-aged group than in the sedentary-aged group, while it was significantly lower in both the sedentary-aged and training-aged groups than in the sedentary-young group. The expression of eNOS protein in the aorta was also significantly higher in the training-aged group than in the sedentary-aged group, while it was also significantly lower in the sedentary-aged group, but not in the training-aged group, than in the sedentary-young group. CONCLUSION The present results revealed that the production of eNOS in the aorta decreases with ageing, and that the decreased production is increased by exercise training in aged rats, which may produce beneficial effects on the impaired cardiovascular system caused by ageing.
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Affiliation(s)
- T Tanabe
- Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
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170
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Ishibashi S, Yokota T, Shiojiri T, Matunaga T, Tanaka H, Nishina K, Hirota H, Inaba A, Yamada M, Kanda T, Mizusawa H. Reversible acute axonal polyneuropathy associated with Wernicke-Korsakoff syndrome: impaired physiological nerve conduction due to thiamine deficiency? J Neurol Neurosurg Psychiatry 2003; 74:674-6. [PMID: 12700319 PMCID: PMC1738426 DOI: 10.1136/jnnp.74.5.674] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Acute axonal polyneuropathy and Wernicke-Korsakoff encephalopathy developed simultaneously in three patients. Nerve conduction studies (NCS) detected markedly decreased compound muscle action potentials (CMAPs) and sensory nerve action potentials (SNAPs) with minimal conduction slowing; sympathetic skin responses (SSRs) were also notably decreased. Sural nerve biopsies showed only mild axonal degeneration with scattered myelin ovoid formation. The symptoms of neuropathy lessened within two weeks after an intravenous thiamine infusion. CMAPs, SNAPs, and SSRs also increased considerably. We suggest that this is a new type of peripheral nerve impairment: physiological conduction failure with minimal conduction delay due to thiamine deficiency.
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Affiliation(s)
- S Ishibashi
- Department of Neurology and Neurological Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
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171
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Nagai H, Yabe A, Mine N, Mikami I, Fujiwara H, Terada Y, Hirano A, Tsuneizumi M, Yokota T, Emi M. Down-regulation in human cancers of DRHC, a novel helicase-like gene from 17q25.1 that inhibits cell growth. Cancer Lett 2003; 193:41-7. [PMID: 12691822 DOI: 10.1016/s0304383502006882] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Frequent observations of allelic loss in chromosomal band 17q25.1 in a variety of human cancers have suggested that one or more tumor suppressor genes are normally present in this region. Moreover, a locus responsible for hereditary focal non-epidermolytic palmoplantar keratoderma (tylosis oesophageal cancer; TOC), a condition associated with esophageal cancer, has been mapped to the same band. During efforts to sequence, by shot-gun methods, a 1 Mb target region that we had defined as the DNA segment harboring the putative tumor suppressor gene(s) involved in these events, we identified a novel cDNA, DRHC (down-regulated in human cancers), that showed reduced expression in 28 of 95 (29%) cell lines derived from a variety of human cancers. The full-length cDNA, 6275 bp long, was expressed predominantly in thymus and brain. The predicted 1942-amino-acid product exhibited significant sequence homology to yeast enzymes belonging to the DEAD-helicase superfamily, and appeared to be a Uvr/Rep helicase with a DEXDc consensus domain. Transfection of a DRHC expression vector inhibited growth of cancer cells in liquid medium or soft agar. The results suggest that loss of expression of DRHC may play a role in human carcinogenesis.
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MESH Headings
- Blotting, Northern
- Brain/metabolism
- Cell Division
- Chromosomes, Human, Pair 17
- Cloning, Molecular
- DNA/metabolism
- DNA Helicases/biosynthesis
- DNA Helicases/genetics
- DNA Helicases/metabolism
- DNA, Complementary/metabolism
- Databases as Topic
- Down-Regulation
- Esophageal Neoplasms/genetics
- Esophageal Neoplasms/metabolism
- Genes, Tumor Suppressor
- Genetic Vectors
- Humans
- Models, Genetic
- Neoplasm Proteins
- Neoplasms/genetics
- Neoplasms/metabolism
- Polymorphism, Single-Stranded Conformational
- Protein Structure, Tertiary
- RNA Helicases
- Reverse Transcriptase Polymerase Chain Reaction
- Thymus Gland/metabolism
- Time Factors
- Transfection
- Tumor Cells, Cultured
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Affiliation(s)
- H Nagai
- Department of Molecular Biology, Institute of Gerontology, Nippon Medical School. 1-396, Kosugi-cho, Nakahara-ku, Kawasaki 211-0063, Japan
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172
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Yokota T, Nakajima H, Sugita T, Tsubaki H, Itou Y, Kaji M, Suzuki M, Kanzawa H, Park JH, Sasano Y. Improved Limb Atmospheric Spectrometer (ILAS) data retrieval algorithm for Version 5.20 gas profile products. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2001jd000628] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- T. Yokota
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
| | - H. Nakajima
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
| | - T. Sugita
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
| | - H. Tsubaki
- Graduate School of Systems Management University of Tsukuba Tokyo Japan
| | - Y. Itou
- Fujitsu F.I.P. Corporation Tokyo Japan
| | - M. Kaji
- Fujitsu F.I.P. Corporation Tokyo Japan
| | - M. Suzuki
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
- Now at Earth Observation Research Center, National Space Development Agency of Japan, Tokyo, Japan
| | - H. Kanzawa
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
| | - J. H. Park
- NASA Langley Research Center Hampton Virginia USA
| | - Y. Sasano
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
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173
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Yokota T, Ishiyama S, Saito T, Teshima S, Yamauchi H. Proposal for limited surgery for gastric cancer. Br J Surg 2002; 89:1483-4. [PMID: 12390403 DOI: 10.1046/j.1365-2168.2002.02246_10.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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174
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Nakajima H, Suzuki M, Matsuzaki A, Ishigaki T, Waragai K, Mogi Y, Kimura N, Araki N, Yokota T, Kanzawa H, Sugita T, Sasano Y. Characteristics and performance of the Improved Limb Atmospheric Spectrometer (ILAS) in orbit. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2001jd001439] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- H. Nakajima
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
| | - M. Suzuki
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
- Now at Earth Observation Center, National Space Development Agency of Japan, Tokyo, Japan
| | | | - T. Ishigaki
- Matsushita Electric Industrial Co., Ltd. Kawasaki Japan
| | - K. Waragai
- Matsushita Electric Industrial Co., Ltd. Kawasaki Japan
| | - Y. Mogi
- Matsushita Electric Industrial Co., Ltd. Kawasaki Japan
| | - N. Kimura
- Matsushita Electric Industrial Co., Ltd. Kawasaki Japan
| | - N. Araki
- Matsushita Electric Industrial Co., Ltd. Kawasaki Japan
| | - T. Yokota
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
| | - H. Kanzawa
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
| | - T. Sugita
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
| | - Y. Sasano
- National Institute for Environmental Studies Tsukuba, Ibaraki Japan
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175
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Yokota T, Ishiyama S, Yamada Y, Murakami Y, Saito T, Yamauchi H. Possible association of Helicobacter pylori infection with lymphoma development in the gastric stump. Scand J Gastroenterol 2002; 37:1115. [PMID: 12374241 DOI: 10.1080/003655202320378365] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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176
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Inaba A, Yokota T, Otagiri A, Nishimura T, Saito Y, Kanouchi T, Mizusawa H. High voltage electrical stimulation of the proximal hypoglossal nerve in normal subjects. Clin Neurophysiol 2002; 113:925-9. [PMID: 12048052 DOI: 10.1016/s1388-2457(02)00019-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVES It is often difficult to stimulate the proximal hypoglossal nerve by magnetic occipital stimulation, even in normal subjects. Therefore, we tested an improved method of stimulating the proximal hypoglossal nerve, using high voltage electrical stimulation. METHODS The proximal hypoglossal nerve was activated by high voltage electrical stimulation using surface electrodes over the occipital skull. The compound muscle action potential (CMAP) was recorded from the lingual muscles using surface electrodes in 10 normal subjects. CMAP and F waves produced by distal hypoglossal nerve stimulation and motor evoked potentials produced by transcranial magnetic stimulation were also recorded. RESULTS When the anode electrode was placed at the mastoid process and the cathode below the inion, the unilateral proximal hypoglossal nerve was readily stimulated supramaximally in all the subjects. The CMAP latency was the same as that obtained with magnetic occipital stimulation. The central motor conduction time (CMCT) calculated from the proximal CMAP was 4.1+/-0.4 ms in the contralateral corticobulbar tract and 4.4+/-0.4 ms in the ipsilateral. The CMCT calculated from the minimal F wave latency was 3.3+/-0.2 ms. CONCLUSIONS The high voltage electrical stimulation is a useful method for stimulating the proximal hypoglossal nerve to estimate the CMCT of the corticobulbar tract.
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Affiliation(s)
- A Inaba
- Department of Neurology, Tokyo Medical and Dental University, 5-45, Yushima 1-chome, Bunkyo-ku, Tokyo, Japan.
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177
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Tsunashima S, Yokota T, Safarik I, Gunning HE, Strausz OP. Abstraction of sulfur atoms from carbonyl sulfide by atomic hydrogen. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100575a003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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178
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179
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Yokota T, Kunii Y, Saito T, Teshima S, Yamada Y, Iwamoto K, Takahashi H, Takahashi M, Kikuchi S, Yamauchi H. Prognostic factors of gastric cancer tumours of less than 2 cm in diameter: rationale for limited surgery. Eur J Surg Oncol 2002; 28:209-13. [PMID: 11944951 DOI: 10.1053/ejso.2001.1178] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND A recent trend in the surgical treatment of patients with early gastric cancer in Japan has been to limit surgery to an extent that ensures complete cure and improvement in the patient's quality of life. If a gastric cancer tumour can be completely eradicated by laparoscopic surgery, the patient can be cured of cancer without major operative stress. A small gastric cancer tumour of less than 2 cm in diameter is an indication for laparoscopic surgery, but little is known about what protocol of surgical treatment is appropriate for this type of tumour. PATIENTS AND METHODS The clinicopathological features of 150 patients with gastric cancer tumour of less than 2 cm in diameter were reviewed retrospectively from hospital records between 1985 and 1995. The results of retrospective analysis of clinicopathological data of 24 patients with advanced cancer were compared with those of 126 patients with early cancer. Univariate and multivariate analyses of patients with small gastric cancer tumours were performed to evaluate the prognostic significance of clinicopathological features. RESULTS A significant difference was seen between the gross tumour appearances in the two groups; Borrmann type-4 tumours were more common in the advanced group. Lymph-node metastasis, lymphatic vessel invasion and vascular invasion were found more frequently in the advanced cancer group than in the early cancer group. Scirrhous type was more common in the advanced cancer group. In univariate analysis, unfavourable prognostic factors included deep cancer invasion, presence of lymph-node metastasis, lymphatic invasion and vascular invasion. Using Cox's proportional hazard regression model, only nodal involvement emerged as an independent statistically significant prognostic parameter associated with long-term survival. CONCLUSION Laparoscopic surgery should not be performed on tumours that are Borrmann type in macroscopic appearance and scirrhous-type histologically. Lymph-node metastasis is an independent prognostic factor. We recommend laparoscopic surgery involving local resection of the stomach without lymphadenectomy for small, early gastric cancer tumours that satisfy the criteria mentioned above. However, the validity of this recommendation should be tested by a prospective randomized control trial in the future.
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Affiliation(s)
- T Yokota
- Department of Surgery, Sendai National Hospital, Sendai 983-8520, Japan.
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180
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Abstract
RD3-0028, a compound with a benzodithiin structure, was found to be a potent inhibitor of respiratory syncytial virus (RSV) replication. Its action is specific; no activity is seen against influenza A virus, measles virus, herpes simplex virus type 1 or 2, or human cytomegalovirus. A time-dependent drug addition experiment indicated that the antiviral activity occurs in the late stage of the RSV replication cycle, since this compound completely inhibited syncytium formation even when added up to 16 hr after the infection of cell monolayers at an MOI of 3. RD3-0028 had no direct virucidal effect on RSV. Western blotting analysis showed that RD3-0028 significantly decreased the amount of RSV proteins released into the cell culture medium. Moreover, five independent isolates of the RSV long strain were selected for growth in RD3-0028 (5-20 microg/ml). These resistant viruses were more than 80-fold less sensitive to RD3-0028 than the long strain. The F gene segment of each of these viruses was sequenced and in each case the mutant RNA segment contained at least one sequence alteration, converting asparagine 276 to tyrosine (F1 protein). These results suggest that RD3-0028 inhibits RSV replication by interfering with intracellular processing of the RSV fusion protein, or a step immediately thereafter, leading to loss of infectivity.
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Affiliation(s)
- K Sudo
- Rational Drug Design Laboratories, Fukushima, Fukushima, Japan.
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181
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Sudo K, Yoshida K, Konno K, Ninomiya S, Hibino SM, Shigeta S, Yokota T. Pharmacokinetics of a benzodithiin (RD3-0028) following aerosol treatment in rat. Xenobiotica 2002; 32:19-27. [PMID: 11820507 DOI: 10.1080/00498250110079158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
1. RD3-0028, a benzodithiin compound, has potent antiviral activity against respiratory syncytial virus (RSV) in cell culture. The compound also inhibits growth of RSV and improves pathologic changes of interstitial pneumonia in the immunosuppressed mouse when delivered by small-particle aerosol. 2. In the present study, the absorption, distribution and excretion of 14C-RD3-0028 were compared in rat following either a single aerosol treatment or oral administration. 3. The plasma concentration was maintained at the same level from 5 min to 1 h, and decreased with a half-life of 2.2 +/- 0.1 h for 1-8 h. 4. The excretion of radioactivity in the urine and faeces at 24 h after aerosol treatment was 89.3 and 4.5%, respectively, indicating that almost all the radioactivity was rapidly excreted in the urine. The excretion of total radioactivity was 98.9% within 168 h. 5. The concentrations of radioactivity in the lung and trachea following aerosol treatment were higher than those in other tissues, and were detected even at 72 h. 6. These results suggest that the aerosol treatment might be useful for delivering RD3-0028 to the respiratory tract of RSV-infected patients.
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Affiliation(s)
- K Sudo
- Rational Drug Design Laboratories, Fukushima, Japan.
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182
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Ishibashi S, Yokota T, Inaba A, Yamada M, Mizusawa H, Iwai T, Shiojiri T. Mexiletine is effective on segmental hyperhidrosis: report of two cases. J Neurol Neurosurg Psychiatry 2002; 72:122. [PMID: 11784840 PMCID: PMC1737711 DOI: 10.1136/jnnp.72.1.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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183
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Igarashi H, Kouro T, Yokota T, Comp PC, Kincade PW. Age and stage dependency of estrogen receptor expression by lymphocyte precursors. Proc Natl Acad Sci U S A 2001; 98:15131-6. [PMID: 11752459 PMCID: PMC64995 DOI: 10.1073/pnas.011513098] [Citation(s) in RCA: 125] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Sex steroids negatively regulate B lymphopoiesis in adult mice. Paradoxically, lymphocytes arise during fetal life, when estrogen levels are high and maternal lymphopoiesis is suppressed. Here we demonstrate that embryonic B lymphopoiesis was unaffected by estrogen, but sensitive to glucocorticoids. Both fetal and adult precursors contained glucocorticoid receptor transcripts, but only adult precursors expressed estrogen receptor alpha and beta together with the androgen receptor. Fetal hematopoietic cells did not efficiently acquire functional estrogen receptors after transplantation to irradiated adult mice. Sex steroid receptors were also expressed in a stage- and developmental age-dependent fashion in human precursors. A developmental switch in responsiveness of hematopoietic cells to sex steroids may be essential for formation of the immune system.
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Affiliation(s)
- H Igarashi
- Immunobiology and Cancer Program, Oklahoma Medical Research Foundation, 825 Northeast 13th Street, Oklahoma City, OK 73104, USA
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184
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Yokota T, Igarashi K, Uchihara T, Jishage K, Tomita H, Inaba A, Li Y, Arita M, Suzuki H, Mizusawa H, Arai H. Delayed-onset ataxia in mice lacking alpha -tocopherol transfer protein: model for neuronal degeneration caused by chronic oxidative stress. Proc Natl Acad Sci U S A 2001; 98:15185-90. [PMID: 11752462 PMCID: PMC65004 DOI: 10.1073/pnas.261456098] [Citation(s) in RCA: 198] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
alpha-Tocopherol transfer protein (alpha-TTP) maintains the concentration of serum alpha-tocopherol (vitamin E), one of the most potent fat-soluble antioxidants, by facilitating alpha-tocopherol export from the liver. Mutations of the alpha-TTP gene are linked to ataxia with isolated vitamin E deficiency (AVED). We produced a model mouse of AVED by deleting the alpha-TTP gene, which showed ataxia and retinal degeneration after 1 year of age. Because the brain alpha-TTP functions in maintaining alpha-tocopherol levels in the brain, alpha-tocopherol was completely depleted in the alpha-TTP(-/-) mouse brain, and the neurological phenotype of alpha-TTP(-/-) mice is much more severe than that of wild-type mice when maintained on an alpha-tocopherol-deficient diet. Lipid peroxidation in alpha-TTP(-/-) mice brains showed a significant increase, especially in degenerating neurons. alpha-Tocopherol supplementation suppressed lipid peroxidation and almost completely prevented the development of neurological symptoms. This therapy almost completely corrects the abnormalities in a mouse model of human neurodegenerative disease. Moreover, alpha-TTP(-/-) mice may prove to be excellent animal models of delayed onset, slowly progressive neuronal degeneration caused by chronic oxidative stress.
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Affiliation(s)
- T Yokota
- Department of Neurology, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan.
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185
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Takeuchi Y, Nagata K, Yokota T, Handa M, Matsunaga H, Nishio Y, Kusugami K. [von Recklinghausen disease associated with intrahepatic cholangiocarcinoma and ampullary carcinoid]. Nihon Naika Gakkai Zasshi 2001; 90:2467-9. [PMID: 11808180 DOI: 10.2169/naika.90.2467] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Y Takeuchi
- Department of Internal Medicine, Shizuoka Kousei Hospital, Shizuoka
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186
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Sawatari N, Yokota T, Sakaguchi S, Ishii Y. Alkane oxidation with air catalyzed by lipophilic N-hydroxyphthalimides without any solvent. J Org Chem 2001; 66:7889-91. [PMID: 11701054 DOI: 10.1021/jo0158276] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- N Sawatari
- Department of Applied Chemistry, Faculty of Engineering, Kansai University, Suita, Osaka 564-8680, Japan
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187
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Yokota T, Kunii Y, Kikuchi S, Yamada Y, Yamauchi H. Will accident reports filed in hospitals in Japan be used in the future as evidence in malpractice lawsuits? Am J Emerg Med 2001; 19:597. [PMID: 11699008 DOI: 10.1053/ajem.2001.28035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
A major drawback of submission of so-called incident reports for medical institutions is that such reports may be able to be obtained on request by patients and to be used as evidence in malpractice lawsuits. In Japan, there are no established rules concerning the use of accident reports in medical lawsuits. More debate is needed for voluntary report systems to become established in medical institutions throughout Japan.
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Affiliation(s)
- T Yokota
- Department of Surgery, Sendai National Hospital, Sendai, Japan.
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188
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Tado M, Abe T, Hatta T, Ishikawa M, Nakada S, Yokota T, Takaku H. Inhibitory effect of modified 5'-capped short RNA fragments on influenza virus RNA polymerase gene expression. Antivir Chem Chemother 2001; 12:353-8. [PMID: 12018680 DOI: 10.1177/095632020101200605] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We have shown previously that the 5'-capped short phosphodiester RNA fragments, Cap decoy, (Gm 12 nt) are potent inhibitors of influenza virus RNA polymerase gene expression. Here we investigate the modified capped RNA derivative containing phosphorothioate oligonucleotides (Cap decoy) as a potential influenza virus RNA polymerase inhibitor. The modified 5'-capped short phosphorothioate RNA fragments (Gms 12-15 nt) with the 5'-capped structure (m7GpppGm) were synthesized by T7 RNA polymerase. The 5'-capped short RNA fragments (Gms 12-15 nt) were encapsulated in liposome particulates and tested for their inhibitory effects on influenza virus RNA polymerase gene expression in the clone 76 cells. The 12-15 nt long Gms RNA fragments showed highly inhibitory effects. By contrast, the inhibitory effects of the 13 nt long short RNA fragments (Gm 13 nt) were considerably less in comparison with the 5'-capped short phosphorothioate RNA fragments (Gms 12-15 nt). In particular, the various Gms RNA chain lengths showed no significant differences in the inhibition of influenza virus RNA polymerase gene expression. Furthermore, the capped RNA with a phosphorothioate backbone was resistant to nuclease activity. These phosphorothioate RNA fragments exhibited higher inhibitory activity than the 5'-capped short RNA fragments (Gm 12 nt). These decoys may prove to be useful in anti-influenza virus therapeutics.
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Affiliation(s)
- M Tado
- Department of Industrial Chemistry, Chiba Institute of Technology, Tsudanuma, Narashino, Japan
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189
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Pang J, Kiyosawa M, Seko Y, Yokota T, Harino S, Suzuki J. Clinicopathological report of retinitis pigmentosa with vitamin E deficiency caused by mutation of the alpha-tocopherol transfer protein gene. Jpn J Ophthalmol 2001; 45:672-6. [PMID: 11754917 DOI: 10.1016/s0021-5155(01)00425-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
PURPOSE To discuss the clinicopathological findings in a patient with retinitis pigmentosa (RP) accompanied by a vitamin E deficiency caused by an H101Q mutation in the alpha-tocopherol transfer protein (alpha-TTP) gene. CASE The clinical course of this patient was followed by conventional ophthalmological examinations over a 3-year period. After the patient died from pancreatic cancer, the eyes were obtained, and examined by light and electron microscopy. OBSERVATIONS The patient complained of night blindness subsequent to adult-onset ataxia, although the ataxia was very mild. His visual acuity was 0.6 OU, and ophthalmoscopy revealed RP sine pigmento. Ring scotomas were detected, and the electroretinography, electro-oculography, and dark-adaptation were altered. Fluorescein angiography showed granular hyperfluorescence around the macula. No progression of the visual and neurological symptoms was observed during the 10 years he was taking oral vitamin E. Histopathological examination revealed the loss of the outer and inner segments of the photoreceptors in the area corresponding to the ring scotoma, as well as a disorganization and shortening of the outer segments in the peripheral retina. CONCLUSIONS We conclude that the clinical and pathological findings in the eyes of this patient having RP with vitamin E deficiency caused by an H101Q mutation are similar to those of common autosomal recessive RP. However, special attention is required in making a diagnosis of RP with vitamin E deficiency because RP with vitamin E deficiency is medically treatable. The mild Friedreich-type ataxia accompanying the RP may be helpful in identifying this disease.
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Affiliation(s)
- J Pang
- Department of Ophthalmology and Visual Science, Tokyo Medical and Dental University, Graduate School, Tokyo, Japan
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190
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Schultz L, Kerckhoffs LH, Klahre U, Yokota T, Reid JB. Molecular characterization of the brassinosteroid-deficient lkb mutant in pea. Plant Mol Biol 2001; 47:491-8. [PMID: 11669574 DOI: 10.1023/a:1011894812794] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The brassinosteriod-deficient lkb mutant of garden pea (Pisum sativum L.) is characterized by an erectoides phenotype (reduced internode length, thickened stems, epinastic leaves), which is rescued by application of exogenous brassinolide. We show that the LKB gene is the Arabidopsis DIMINUTO/DWARF-1 (DIM/DWF1) homologue of pea. The DIM/DWF1 homologue from lkb plants contains a mutation that may result in reduced enzyme function, thus resulting in the previously shown accumulation of 24-methylenecholesterol and a deficiency of its hydrogenated product, campesterol. This ultimately leads to a deficiency of the biologically active brassionolide. The mutation in the lkb sequence cosegregates with the lkb phenotype. Northern analyis of the LKB gene revealed that the gene is ubiquitously expressed around the plant and that there is no evidence for negative feedback regulation of the gene.
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Affiliation(s)
- L Schultz
- School of Plant Science, University of Tasmania, Hobart, Australia
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191
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Ota M, Sato-Matsumura KC, Matsumura T, Kataura A, Yokota T, Kobayashi K, Shimizu H. Close association of dermatitis herpetiformis and chronic tonsillitis in a Japanese patient without gluten sensitivity. Acta Derm Venereol 2001; 81:373-4. [PMID: 11800152 DOI: 10.1080/000155501317140160] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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192
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Matsubayashi H, Kuraoka K, Kobayashi Y, Yokota T, Iiri Y, Shichijo K, Tada T, Satoh K, Kijima H. Ruptured epidermoid cyst and haematoma of spleen: a diagnostic clue of high levels of serum carcinoembryonic antigen, carbohydrate antigen 19-9 and Sialyl Lewis x. Dig Liver Dis 2001; 33:595-9. [PMID: 11816551 DOI: 10.1016/s1590-8658(01)80114-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Splenic epidermoid cyst is a rare disease and that with haematoma is even more rare. The case of epidermoid cyst of the spleen is described, in a 36-year-old Japanese female, manifesting as left hypochondralgia and rupture of the cyst. Clinical features were splenic lesion 14 cm in diameter and consisting of round-hypovascular and crescent-hypervascular sublesions. Extravasation of cystic fluid was detected in abdominal cavity Preoperative diagnosis was difficult due to such uncommon features, however high levels of serum tumour markers (carcinoembryonic antigen, carbohydrate antigen 19-9, Sialyl Lewis x) strongly suggested epidermoid cyst. Laparotomic splenectomy and cholecystectomy were performed for splenic lesion and gallstones, and serum tumour markers decreased following surgery. Pathological diagnosis of the round-hypovascular lesion was epidermoid cyst and crescent-hypervascular lesion was haemorrhage (haematoma).
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Affiliation(s)
- H Matsubayashi
- Department of Gastroenterology, Tachikawa General Hospital, Nagaoka, Niigata, Japan
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193
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Yokota T, Saito T, Teshima S, Yamada Y, Iwamoto K, Takahashi M, Kunii Y, Murata K, Ishiyama S, Yamauchi H. Probability of lymph node metastasis in small gastric cancer tumor: is it an indication for limited surgery? Int Surg 2001; 86:206-9. [PMID: 12056462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
Abstract
The purpose of this study was to determine the factors that are predictive of lymph node metastasis in a small gastric cancer tumor <2 cm in diameter. The clinicopathological features of 17 patients with node-positive small gastric cancer were reviewed from the database of gastric cancer at the Department of Surgery, Sendai National Hospital, Sendai, Japan, and they were compared with those of 131 patients with node-negative cancer. The independent risk factors influencing the lymph node metastasis were determined by multiple logistic regression analysis. Depth of invasion, macroscopic appearance, cancer-stromal relationship, and lymphatic microinvasion were found to be associated with lymph node metastasis. The variables found to be significant risk factors for lymph node metastasis were depth of invasion (P = 0.0250) and lymphatic microinvasion (P = 0.0028). It is possible for even a small gastric cancer tumor to have lymph node metastasis. A surgeon treating a small gastric cancer tumor must consider that although the cure rate is high, >10% of these tumors have lymph node metastases. Because of the possibility of lymph node metastasis, even with accurate knowledge of the depth of cancer invasion, selective performance of local resection or limited surgery with incomplete lymph node dissection is not justified. Accurate preoperative diagnosis and the appropriate decision for surgical indication are important. Large-scale randomized, controlled trials should be performed to show the advantage of limited surgery for gastric cancer.
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Affiliation(s)
- T Yokota
- Department of Surgery, Sendai National Hospital, Japan.
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194
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Inaba A, Yokota T, Saito Y, Ichikawa T, Mizusawa H. Proximal motor conduction evaluated by transcranial magnetic stimulation in acquired inflammatory demyelinating neuropathies. Clin Neurophysiol 2001; 112:1936-45. [PMID: 11595155 DOI: 10.1016/s1388-2457(01)00643-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVES To evaluate conduction abnormalities in the proximal motor nerve in patients with acquired inflammatory demyelinating neuropathies by transcranial magnetic stimulation (TMS). METHODS TMS intensity and background voluntary contraction (BVC) to evoke maximal size of motor evoked potential (MEP) in hand muscle were investigated in 24 normal subjects. Effect of experimentally induced conduction block by injecting local anesthetics in the peripheral nerve on MEP size was also studied in two normal subjects. In 22 patients with inflammatory demyelinating neuropathies, maximal MEPs were recorded in the deteriorating and recovery stages of the illness. RESULTS In normal subjects, the MEP became maximal with 30-50% of maximal BVC and at more than 80% the maximal stimulator output of the 2.0 T circular coil. The change in MEP size well reflected the degree of conduction block induced by local anesthetics. Findings for patients suggested conduction abnormalities proximal to axilla in 9 patients, and that the abnormal reduction of Erb CMAP was the result of submaximal stimulation, not true conduction block, in 3 patients. The increase in MEP/wrist CMAP ratio was better correlated with improvement in muscle strength than with change in the axilla or Erb CMAP/wrist CMAP ratio. CONCLUSIONS Problems such as conduction abnormalities in the motor tract of the central nervous system could not fully be excluded, but we consider that maximal MEP size can be used to predict proximal motor nerve conduction abnormalities.
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Affiliation(s)
- A Inaba
- Clinical Laboratory, Tokyo Medical and Dental University Medical Hospital, 5-45 Yushima 1-chome, Bunkyo-ku, 113-8519, Tokyo, Japan
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195
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Watanabe T, Noguchi T, Yokota T, Shibata K, Koshino H, Seto H, Kim S, Takatsuto S. Synthesis and biological activity of 26-norbrassinolide, 26-norcastasterone and 26-nor-6-deoxocastasterone. Phytochemistry 2001; 58:343-349. [PMID: 11551562 DOI: 10.1016/s0031-9422(01)00213-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
26-Norbrassinolide, identified as a metabolite of brassinolide in cultured cells of the liverwort, Marchantia polymorpha, as well as 26-norcastasterone and 26-nor-6-deoxocastasterone were synthesized. Synthesis of these new brassinosteroids was conducted by employing the orthoester Claisen rearrangement and asymmetric dihydroxylation as key reactions. The modified rice lamina inclination test indicated that these three 26-norbrassinosteroids were less active than their corresponding C28 brassinosteroids. Growth-promoting activities were also examined by using the brassinosteroid-deficient, dwarf mutant lkb of garden pea (Pisum sativum L.). In this assay, 26-norbrassinolide was as effective as brassinolide and 26-norcastasterone was more effective than castasterone although 26-nor-6-deoxocastasterone was much less effective than 6-deoxocastasterone. Therefore, removal of C-26 of brassinosteroids does not necessarily reduce the biological activity. The role of C-26 removal in Marchantia cells remains unclear.
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Affiliation(s)
- T Watanabe
- Tama Biochemical Co. Ltd., 2-7-1 Nishishinjuku Shinjuku-ku, 163-0704, Tokyo, Japan.
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196
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Yokota T, Sato T, Takeuchi Y, Nomura T, Uno K, Watanabe T, Takatsuto S. Roots and shoots of tomato produce 6-deoxo-28-norcathasterone, 6-deoxo-28-nortyphasterol and 6-deoxo-28-norcastasterone, possible precursors of 28-norcastasterone. Phytochemistry 2001; 58:233-238. [PMID: 11551544 DOI: 10.1016/s0031-9422(01)00237-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Roots and shoots of tomato (Lycopersicon esculentum) were investigated for the occurrence of biosynthetic precursors of 28-norcastasterone, a C27 brassinosteroid that we have shown to be present in shoots of tomato. A series of putative precursors, including 6-deoxo-28-norcathasterone, 6-deoxo-28-norteasterone, 3-dehydro-6-deoxo-28-norteasterone, 6-deoxo-28-nortyphasterol and 6-deoxo-28-norcastasterone, were synthesized and used as GC-MS standards, resulting in the identification of 6-deoxo-28-norcathasterone, 6-deoxo-28-nortyphasterol and 6-deoxo-28-norcastasterone in both roots and shoots. These findings indicate that the biosynthesis of 28-norcastasterone may parallel that of castasterone. The endogenous levels of brassinosteroids differed between roots and shoots, indicating that the biosynthesis of brassinosteroids is differently regulated between these tissues. Regulation of root growth by brassinosteroids is also discussed.
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Affiliation(s)
- T Yokota
- Department of Biosciences, Teikyo University, 320-8551, Utsunomiya, Japan.
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Nishinakamura R, Matsumoto Y, Nakao K, Nakamura K, Sato A, Copeland NG, Gilbert DJ, Jenkins NA, Scully S, Lacey DL, Katsuki M, Asashima M, Yokota T. Murine homolog of SALL1 is essential for ureteric bud invasion in kidney development. Development 2001; 128:3105-15. [PMID: 11688560 DOI: 10.1242/dev.128.16.3105] [Citation(s) in RCA: 224] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
SALL1 is a mammalian homolog of the Drosophilaregion-specific homeotic gene spalt (sal); heterozygous mutations in SALL1 in humans lead to Townes-Brocks syndrome. We have isolated a mouse homolog of SALL1 (Sall1) and found that mice deficient in Sall1 die in the perinatal period and that kidney agenesis or severe dysgenesis are present. Sall1 is expressed in the metanephric mesenchyme surrounding ureteric bud; homozygous deletion ofSall1 results in an incomplete ureteric bud outgrowth, a failure of tubule formation in the mesenchyme and an apoptosis of the mesenchyme. This phenotype is likely to be primarily caused by the absence of the inductive signal from the ureter, as the Sall1-deficient mesenchyme is competent with respect to epithelial differentiation. Sall1 is therefore essential for ureteric bud invasion, the initial key step for metanephros development.
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Affiliation(s)
- R Nishinakamura
- Division of Stem Cell Regulation, Institute of Medical Science, The University of Tokyo, Japan.
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Yokota T, Kunii Y, Saito T, Teshima S, Yamada Y, Takahashi M, Kikuchi S, Yamauchi H. Prognostic factors for gastric cancer in the elderly. Eur J Surg Oncol 2001; 27:451-3. [PMID: 11504514 DOI: 10.1053/ejso.2001.1109] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- T Yokota
- Department of Surgery, Sendai National Hospital, Miyagino-ku, Sendai 983-8520, Japan.
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Abstract
BACKGROUND AND STUDY AIMS Laterally spreading tumors (LST) of the colon are best removed by endoscopic mucosal resection (EMR) as they extend laterally rather than vertically. Since they sometimes invade deeply into the submucosal layer, it is important to assess the depth of invasion endoscopically before treatment. In the present study, we examined the endoscopic features of a large number of LSTs in order to assess which features correlated with depth of invasion. MATERIALS AND METHODS 257 LSTs removed at the National Cancer Center Hospital, Tokyo, between January 1988 and September 1998 were retrospectively analyzed. RESULTS With univariate analysis, unevenness of nodules, presence of large nodules, size, histological type, and presence of depression in the tumor were significantly associated with depth of invasion. Multivariate analysis revealed that histological type and depression in the tumor were independent factors predicting massive submucosal invasion. When an LST showed: 1) even nodules without depression, or 2) uneven nodules without depression and less than 3 mm in diameter, the risk of massive submucosal invasion was 0 % (0/121) and 3.7 % (3/82), respectively. CONCLUSION When LSTs meet the above endoscopic criteria, EMR should be the first-line treatment because of the low risk of massive submucosal invasion.
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Affiliation(s)
- Y Saito
- Dept. of Gastrointestinal Endoscopy, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104, Japan.
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Nakayama M, Koshioka M, Matsui H, Ohara H, Mander LN, Leitch SK, Twitchin B, Kraft-Klaunzer P, Pharis RP, Yokota T. Endogenous gibberellins in immature seeds of Prunus persica L.: identification of GA(118), GA(119), GA(120), GA(121), GA(122) and GA(126). Phytochemistry 2001; 57:749-758. [PMID: 11397444 DOI: 10.1016/s0031-9422(01)00154-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The endogenous gibberellins in immature seeds of Prunus persica were analyzed by gas chromatography-mass spectrometry. Eleven known gibberellins, GA(3), GA(9), GA(17), GA(19), GA(30), GA(44), GA(61), GA(63), GA(87), GA(95) and GA(97) were identified. Additionally, several hitherto unknown gibberellins were detected and their putative structures were verified by synthesis of the authentic gibberellins. These gibberellins were then assigned trivial numbers, e.g. 1alpha-hydroxy GA(20) (GA(118)), 1alpha-hydroxy GA(9) (GA(119)), 1,2-didehydro GA(9) (GA(120)), 1,2-didehydro GA(70) (GA(121)), 1,2-didehydro GA(69) (GA(122)) and 1,2-didehydro GA(77) (GA(126)). GA(118) and GA(119) were the first 1alpha-hydroxy gibberellins identified from higher plants. The above profile of 1,2-didehydro gibberellins suggests that 1,2-dehydrogenation might occur prior to 3beta-hydroxylation in biosynthesis of GA(3), GA(30) and GA(87) in immature seeds of P. persica.
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Affiliation(s)
- M Nakayama
- Department of Genetics and Physiology, National Institute of Floricultural Science, 2-1 Fujimoto, Tsukuba, Ibaraki 305-8519, Japan
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