Kunihiko Fukuchi

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Several chemically defined plant extracts were investigated for their antiviral action on herpes simplex virus (HSV-1, HSV-2)-infected African green monkey kidney cells and human adenocarcinoma cells, using a plaque formation assay. Among them, the monomeric hydrolyzable tannins, oligomeric ellagitannins and condensed tannins, having galloyl groups or(More)
We conducted an antibiotic susceptibility survey of 830 blood-borne methicillin resistant Staphylococcus aureus collected from nationwide hospitals in Japan over a three-year period from January 2008 through May 2011. Antibiotic susceptibility was judged according to the criteria recommended by the Clinical Laboratory Standard Institute. Over 99% of the(More)
Purified virion DNA (120 X 10(6) molecular weight [MW]) of Marek's disease virus strain GA was cleaved with BamHI restriction endonuclease, and 27 out of the 29 fragments were cloned into bacterial plasmids. Restriction maps for BamHI, BglI, and SmaI endonucleases were constructed. The genomic structure of Marek's disease virus DNA was found to be similar(More)
Iron deprivation of HL-60 cells with deferoxamine B mesylate (DFO) induced apoptosis. DNA fragmentation became apparent with 10(-6) M DFO after 48 h treatment. The apoptosis peak according to the DNA histogram on flow cytometry and typical nuclear collapse and were observed microscopically after 48 h treatment with 10(-4) M DFO. Cells treated with 10(-4) M(More)
Epigallocatechin gallate (EGCG) induced apoptosis-associated characteristics in human oral tumor cell lines more efficiently than ascorbates, gallic acid, vitamin K, flavonoids or steroidal saponins. Since catalase partially inhibited the cytotoxic activity of EGCG, the possible involvement of hydrogen peroxide (H2O2) in cell death induction was(More)
The cyclin-dependent kinase inhibitors known as p15, p16 and p18 have been suggested as candidates for tumour suppressor genes. We examined these genes for their alterations in 46 myeloid leukaemias and 15 myeloid leukaemia cell lines. p16 mRNA expression was studied in 41 myeloid leukaemias. The p15 and p16 genes were either deleted or mutated in myeloid(More)
A series of phenothiazine, benzo[a]phenothiazine and benz[c]acridine derivatives were compared for their ability to induce nucleosome-sized DNA fragmentation (a biochemical hallmark of apoptosis), using agarose gel electrophoresis and a fluorescence activated cell sorter. Significant DNA fragmentation-inducing activity was detected in(More)
Histopathological samples are commonly used for molecular testing to detect both oncogenes and tumor-suppressor genes in lung cancer. The purpose of this study was to determine the efficacy of using curette lavage fluid for molecular testing to detect EGFR, KRAS and P53 mutations in lung cancer patients. Samples were obtained from 77 lung cancer patients by(More)
We investigated the effect of deferoxamine mesylate (DFO), an iron chelator, to test whether ascorbate-induced cytotoxicity is due to iron-catalyzed oxidation. Exposing human promyelocytic leukemic HL-60 cells to either sodium ascorbate or ascorbic acid for 1 h resulted in the progressive production of apoptotic cells characterized by cell shrinkage, as(More)
Deferoxamine (DFO)-induced iron deprivation caused an increase in p53 expression in ML-1 and Raji cells. In ML-1 cells, with express wild type p53, p53 protein levels were transiently increased 6 h after addition of 10(-4)M DFO. In Raji cells, which carry a mutant p53 allele, p53 increased 6 h after addition of 10(-4)M DFO and remained elevated for 24 h.(More)