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61.
Yasuhiro Yamasaki Daisuke Katsuo Seiichiro Nakayasu Cristina Salati JingJing Duan Yanan Zou Yukihiko Matsuyama Kenichi Yamaguchi Tatsuya Oda 《Journal of biochemical and molecular toxicology》2008,22(6):405-415
Our recent studies have demonstrated that the aqueous extract prepared from Alexandrium tamarense, a harmful red tide phytoplankton, showed cytotoxicity on Vero cells. In this study, the toxic substance was purified from the culture supernatant of A. tamarense. Based on the gel‐filtration profile, the molecular mass of a purified toxin was estimated to be about 1,000 kDa. On sodium dodecylsulfate‐polyacrylamide gel electrophoresis (SDS‐PAGE) analysis, a main band with molecular mass of 1,000 kDa was detected with periodic acid‐Schiff (PAS) staining, but no protein bands were detected by Coomassie brilliant blue (CBB) protein staining. Sugar composition analysis of the toxin suggested that the toxin contains galactose, fucose, mannose, N‐acetylglucosamine, xylose, and other minor saccharides, whereas no significant levels of amino acids were detected by amino acid analysis. These results suggest that the toxin is a polysaccharide‐based compound. The toxin showed cytotoxic effects on various cell lines in a concentration‐dependent manner. Among the cell lines tested, U937 cells were the most susceptible to the toxin. In U937 cells treated with the toxin, a typical apoptotic nuclear morphological change and DNA fragmentation were observed. This is the first report demonstrating that a polysaccharide‐based toxin isolated from red tide phytoplankton can induce apoptotic cell death. © 2008 Wiley Periodicals, Inc. J Biochem Mol Toxicol 22:405–415, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/jbt.20253 相似文献
62.
Atushi Ushimaru Satoshi Kikuchi Ryuji Yonekura Atsushi Maruyama Nao Yanagisawa Maiko Kagami Michiko Nakagawa Suzuki Mahoro Yukihiko Kohmatsu Aya Hatada Shumpei Kitamura Kensuke Nakata 《Nordic Journal of Botany》2004,24(5):593-598
We compared the amount of variation in flower size between autogamous and insect-pollinated species to examine the hypothesis that pollinator-mediated selection stabilizes flower size in plant populations. One would expect the flower size variation to be larger in selfing species that are less affected by pollinator-mediated stabilizing selection than in insect-pollinated species. The results of phylogenetic comparisons between autogamous and insect-pollinated flowers supported the pollinator-mediated stabilizing selection hypothesis, although the non-phylogenetic comparison did not. According to our results, we discuss the factors influencing the flower size variation. 相似文献
63.
64.
The RING finger protein, RNF8, interacts with retinoid X receptor alpha and enhances its transcription-stimulating activity 总被引:3,自引:0,他引:3
65.
Atsushi Sato Nobuo Ida Mari Ishikawa Kazuhiro Tanahashi Haruji Nakamura Yukihiko Sho Terukatsu Arima Tetsunosuke Kunitomo 《Microbiology and immunology》1993,37(4):295-304
An enzyme-linked immunosorbent assay (ELISA) was developed for the detection of anti-HCV antibody. We assayed for antibodies against either oligopeptide (S29-1) deduced from the nucleocapsid gene or the product of nonstructural region (NS3) synthesized in a recombinant Escherichia coli (S4). To reduce false-positive results induced by non-specific binding of antibodies with a carrier protein and to increase the sensitivity of an immunoassay, non-fused S4 peptide was prepared by the recombinant DNA technique and site-specific proteolysis (by factor Xa). In 71 non-A, non-B hepatitis patients with chronic liver disease, 70 (98.5%) were positive by S29-1/S4 ELISA as well as by a second-generation test (Abbott II). On the other hand, of 40 serum samples from blood donors, in which anti-N14 (core) and C100-3 antibodies were not detected but hepatitis C virus (HCV) RNA was detectable by polymerase chain reaction (PCR), 24 (60%) were positive by S29-1/S4 ELISA, whereas only 18 (45%) were diagnosed by Abbott II. In addition, based on results in a small group of 92 blood donors, detection of anti-S29-1/S4 antibody correlated well with HCV viremia as confirmed by PCR. These results indicated that the preparation of non-fused protein (S4) by recombinant DNA technique and a combination of S29-1 and S4 as immobilized antigens in an ELISA provide a sensitive and specific diagnosis for HCV infection with good correlation with the presence of viral RNA as confirmed by PCR. 相似文献
66.
Ryo Kubota Setsuko Noda Yimin Wang Shinsei Minoshima Shuichi Asakawa Jun Kudoh Yukihiko Mashima Yoshihisa Oguchi Nobuyoshi Shimizu 《Genomics》1997,41(3):360
We have isolated a human cDNA clone encoding a novel acidic protein of MW 55,000 that we designated “myocilin” since it has homology to myosin and is localized preferentially in the ciliary rootlet and basal body of the connecting cilium of photoreceptor cells. The deduced amino acid sequence of human myocilin showed significant homologies with nonmuscle myosin ofDictyostelium discoideumin the N-terminal region and also with olfactomedin of bullfrog in the C-terminal region. Myocilin contained a leucine zipper-like motif similar to that seen in kinectin and other cytoskeletal proteins. These findings suggest that myocilin is a novel cytoskeletal protein involved in the morphogenesis of ciliated neuroepithelium such as photoreceptor cells. The myocilin gene (MYOC) was mapped to human chromosome 1q23–q24 by fluorescencein situhybridization. 相似文献
67.
Shuya Yano Kiyoto Takehara Shinji Miwa Hiroyuki Kishimoto Yukihiko Hiroshima Takashi Murakami Yasuo Urata Shunsuke Kagawa Michael Bouvet Toshiyoshi Fujiwara Robert M. Hoffman 《PloS one》2016,11(2)
Fluorescence-guided surgery (FGS) of cancer is an area of intense development. In the present report, we demonstrate that the telomerase-dependent green fluorescent protein (GFP)-containing adenovirus OBP-401 could label colon-cancer liver metastasis in situ in an orthotopic mouse model enabling successful FGS. OBP-401-GFP-labeled liver metastasis resulted in complete resection with FGS, in contrast, conventional bright-light surgery (BLS) did not result in complete resection of the metastasis. OBP-401-FGS reduced the recurrence rate and prolonged over-all survival compared with BLS. In conclusion, adenovirus OBP-401 is a powerful tool to label liver metastasis in situ with GFP which enables its complete resection, not possible with conventional BLS. 相似文献
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69.
We examined the microhabitat determinants of the benthic goby Rhinogobius sp. OR (orange form) in runs by measuring fish density, and substrate and hydraulic variables at four sites in the middle
and lower reaches of the Ado River, Japan. One of the four sites was located below a bridge pier in the lower reach and had
coarser substrate than was typical there. This contributed to the elimination of the correlation between substrate condition
and hydraulic variables by providing anomalous combinations of substrate and hydraulic variables. Using principal component
analysis, the variables were divided into substrate and hydraulic components. A multiple regression analysis revealed that
substrate variables explained more of the variance in fish density than hydraulic variables. We concluded that the density
of this goby is determined by substrate conditions in runs, where the current velocity is lower and the stone shelter is scarcer
than in riffles. The importance of substrate conditions, which can be easily masked by current velocity in natural settings,
should not be neglected. 相似文献
70.