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Lee, Sunh-Dong,Kameda, Kenji,Takaku, Takeshi,Sekiya, Keizo,Hirose, Kumi,Ohtani, Kazuhiro,Tanaka, Osamu,Okuda, Hiromichi The Korean Society of Ginseng 1990 Journal of Ginseng Research Vol.14 No.1
Toxohorome-L is a lipolytic factor found in ascites fluid of sarcoma 180-bearing mice and of patients with hepatoma. A substance that inhibited the lipolytic action of Toxohormone-L was isoialed from red ginseng powder. This substance had a pectin-like o 1, 4-pollrgalacturonan backbone with some acetoxyl groups, and so was an acidic polysaccharide. It inhibited Toxohormone-L-induced lipolysis in a dose dependent manner at concentrations higher than 10 $\mu\textrm{g}$/ml.
Tang, Ning,Araki, Yuki,Tamura, Kenji,Dong, Lijun,Zhang, Xuemei,Liu, Qiuhua,Ji, Ruonan,Kameda, Takayuki,Toriba, Akira,Hayakawa, Kazuichi Korean Society for Atmospheric Environment 2009 Asian Journal of Atmospheric Environment (AJAE) Vol.3 No.1
Airborne particulates were collected in three different size fractions (>7 ${\mu}m$; 2.1-7 ${\mu}m$; < 2.1 ${\mu}m$) by using Andersen low-volume air samplers at three sites in Tieling city, Liaoning Province, a typical local city in northeast China, in every season during the period from July 2003 to May 2004. Nine polycyclic aromatic hydrocarbons (PAHs) and seven nitropolycyclic aromatic hydrocarbons (NPAHs) in the airborne particulates were determined by HPLC with fluorescence and chemiluminescence detection, respectively. The mean total concentrations of the nine PAHs and seven NPAHs were highest at The mixed residential and light industrial site, and lowest at the residential site near the suburbs. At all sites, more than 70% of the total PAHs and more than 60% of the total NPAHs were found in the finest particulate (< 2.1 ${\mu}m$) fraction. Both cluster analysis and several diagnostic ratios showed that the major contributors of PAHs and NPAHs in airborne particulates were coal combustion systems such as domestic stoves and coal boilers in all seasons in Tieling city.
Dau, Pham Thi,Sakai, Hiroki,Hirano, Masashi,Ishibashi, Hiroshi,Tanaka, Yuki,Kameda, Kenji,Fujino, Takahiro,Kim, Eun-Young,Iwata, Hisato Academic Press 2013 Toxicological sciences Vol.131 No.1
<P>The constitutive androstane receptor (CAR) not only displays a high basal transcriptional activity but also acts as a ligand-dependent transcriptional factor. It is known that CAR exhibits different ligand profiles across species. However, the mechanisms underlying CAR activation by chemicals and the species-specific responses are not fully understood. The objectives of this study are to establish a high-throughput tool to screen CAR ligands and to clarify how CAR proteins from the Baikal seal (bsCAR) and the mouse (mCAR) interact with chemicals and steroid receptor coactivator 1 (SRC1). We developed the surface plasmon resonance (SPR) system to assess quantitatively the interaction of CAR with potential ligands and SRC1. The ligand-binding domain (LBD) of bsCAR and mCAR was synthesized in a wheat germ cell-free system. The purified CAR LBD was then immobilized on the sensor chip for the SPR assay, and the kinetics of direct interaction of CARs with ligand candidates was measured. Androstanol and androstenol, estrone, 17β-estradiol, TCPOBOP, and CITCO showed compound-specific but similar affinities for both CARs. The CAR-SRC1 interaction was ligand dependent but exhibited a different ligand profile between the seal and the mouse. The results of SRC1 interaction assay accounted for those of our previous in vitro CAR-mediated transactivation assay. In silico analyses also supported the results of CAR-SRC1 interaction; there is little structural difference in the ligand-binding pocket of bsCAR and mCAR, but there is a distinct discrimination in the helix 11 and 12 of these receptors, suggesting that the interaction of ligand-bound CAR and SRC1 is critical for determining species-specific and ligand-dependent transactivation over the basal activity. The SPR assays demonstrated a potential as a high-throughput screening tool of CAR ligands.</P>
Biological Activities of Non - saponin Compounds Isolated from Korean Red Ginseng
(Hiromichi Okuda),(Sung Dong Lee),(Yukinaga Matsuura),(Yinan Zheng),(Keizo Sekiya),(Takeshi Takaku),(Kenji Kameda),(Kumi Hirose),(Kazuhiro Ohtani),(Osamu Tanaka),(Toshiie Sakata) 고려인삼학회 1990 Proceedings of International Symposium on Korean G Vol.- No.-