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Hydrolytic profile for ester- or amide-linkage by carboxylesterases pI 5.3 and 4.5 from human liver.
- S. Takai, A. Matsuda, +5 authors Kenichi Hirano
- Chemistry, Medicine
- Biological & pharmaceutical bulletin
- 15 August 1997
Carboxylesterases (EC 220.127.116.11) from human liver were purified using Q-Sepharose, Sephadex G-150, isoelectrofocusing and Con A-Sepharose. The calculated molecular mass of the pI 5.3 enzyme was 120 kDa… Expand
Chemical genomic screening for methylation‐silenced genes in gastric cancer cell lines using 5‐aza‐2′‐deoxycytidine treatment and oligonucleotide microarray
- S. Yamashita, Y. Tsujino, K. Moriguchi, M. Tatematsu, T. Ushijima
- Biology, Medicine
- Cancer science
- 1 January 2006
To identify novel methylation‐silenced genes in gastric cancers, we carried out a chemical genomic screening, a genome‐wide search for genes upregulated by treatment with a demethylating agent,… Expand
High Levels of Aberrant DNA Methylation in Helicobacter pylori–Infected Gastric Mucosae and its Possible Association with Gastric Cancer Risk
- T. Maekita, K. Nakazawa, +12 authors T. Ushijima
- Medicine, Biology
- Clinical Cancer Research
- 1 February 2006
Introduction: Risk prediction of gastric cancers is important to implement appropriate screening procedures. Although aberrant DNA methylation is deeply involved in gastric carcinogenesis, its… Expand
DNA methylation of microRNA genes in gastric mucosae of gastric cancer patients: Its possible involvement in the formation of epigenetic field defect
Accumulation of aberrant DNA methylation in normal‐appearing gastric mucosae, mostly induced by H. pylori infection, is now known to be deeply involved in predisposition to gastric cancers… Expand
Comparative histochemical study of alimentary tracts with special reference to the mucous neck cells of the stomach.
- T. Suganuma, T. Katsuyama, M. Tsukahara, M. Tatematsu, Y. Sakakura, F. Murata
- Medicine, Biology
- The American journal of anatomy
- 1 June 1981
Combinations of recently developed paradoxical concanavalin-A staining (PCS) and other routine histochemical procedures have made it possible to classify mucosubstances more precisely. By taking… Expand
Quantitative detection of CEA expressing free tumor cells in the peripheral blood of colorectal cancer patients during surgery with real-time RT-PCR on a LightCycler.
We applied novel real-time reverse transcriptase-polymerase chain reaction (RT-PCR) with a LightCycler for quantitative detection of carcinoembryonic antigen (CEA) mRNA expressing tumor cells in the… Expand
Studies on antioxidants: their carcinogenic and modifying effects on chemical carcinogenesis.
- N. Ito, M. Hirose, S. Fukushima, H. Tsuda, T. Shirai, M. Tatematsu
- Medicine, Chemistry
- Food and chemical toxicology : an international…
- 1 October 1986
Studies were conducted on the carcinogenic activity of butylated hydroxyanisole (BHA) in rats and hamsters. To obtain information concerning the mechanism of action of BHA on the forestomach, the… Expand
Enhancing effect of various hepatocarcinogens on induction of preneoplastic glutathione S-transferase placental form positive foci in rats--an approach for a new medium-term bioassay system.
A large series of assays of the hepatocarcinogenic potential of 112 different compounds were carried out using a rapid bioassay system developed in this laboratory based on the two-step concept of… Expand
Inflammatory processes triggered by Helicobacter pylori infection cause aberrant DNA methylation in gastric epithelial cells.
Altered patterns of DNA methylation associated with Helicobacter pylori (HP) infection of gastric epithelial cells are thought to contribute to gastric cancer risk. However, it is unclear whether… Expand
Down-regulation of a gastric transcription factor, Sox2, and ectopic expression of intestinal homeobox genes, Cdx1 and Cdx2: inverse correlation during progression from gastric/intestinal-mixed to…
- T. Tsukamoto, Ken-ichi Inada, +6 authors M. Tatematsu
- Biology, Medicine
- Journal of Cancer Research and Clinical Oncology
- 1 March 2004
Purpose The molecular mechanisms underlying the development of intestinal metaplasia (IM) of the human stomach have yet to be clarified in detail. Besides ectopic expression of intestinal… Expand