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  • 1
    In: Bioscience, Biotechnology, and Biochemistry, Oxford University Press (OUP), ( 2023-09-14)
    Abstract: We focused on Piper longum L., an herbal drug produced in Myanmar, which has a renoprotective effect. Thus, we attempted to isolate and identify compounds that enhance the expression of the ABCG2 gene from the aerial parts of the plant except for the fruit. Among the various P. longum extracts, we isolated and identified the components. Using Caco-2 cells, the hABCG2 mRNA expression-enhancing effects of the isolated compounds were compared with the positive reference compound (3-methylcholanthrene: 3MC) using real-time PCR. Six compounds were isolated and identified from the methanol extract of P. longum. Among the isolated compounds, licarin A and neopomatene had lower toxicity and higher hABCG2-mRNA expression-enhancing effects in Caco-2 cells. Suppression of hAhR expression by siRNA reduced the activity of licarin A and neopomatene, as well as the hAhR agonist 3MC, suggesting that these two compounds may act as hAhR agonists to promote hABCG2 expression.
    Type of Medium: Online Resource
    ISSN: 1347-6947
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2023
    detail.hit.zdb_id: 2110940-0
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  • 2
    Online Resource
    Online Resource
    American Association for the Advancement of Science (AAAS) ; 2000
    In:  Science Vol. 288, No. 5469 ( 2000-05-19), p. 1237-1239
    In: Science, American Association for the Advancement of Science (AAAS), Vol. 288, No. 5469 ( 2000-05-19), p. 1237-1239
    Abstract: The pattern of ground motion for a magnitude 5.7 earthquake near Tokyo was captured by 384 strong ground motion instruments across the Kanto sedimentary basin and its surroundings. The records allow the visualization of the propagation of long-period ground motion in the basin and show the refraction of surface waves at the basin edge. The refracted wave does not travel directly from the earthquake epicenter, but traverses the basin obliquely to the edge. The surface wave inside the basin propagates more slowly than that outside such that the wavefronts separate from each other, and the refracted wave heals the discrepancy in the speed of advance of the wavefronts inside and outside the basin. The refracted arrival is dominant near the edge of the Kanto basin.
    Type of Medium: Online Resource
    ISSN: 0036-8075 , 1095-9203
    RVK:
    RVK:
    Language: English
    Publisher: American Association for the Advancement of Science (AAAS)
    Publication Date: 2000
    detail.hit.zdb_id: 128410-1
    detail.hit.zdb_id: 2066996-3
    detail.hit.zdb_id: 2060783-0
    SSG: 11
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  • 3
    Online Resource
    Online Resource
    American Association for the Advancement of Science (AAAS) ; 2005
    In:  Science Vol. 309, No. 5733 ( 2005-07-15), p. 462-464
    In: Science, American Association for the Advancement of Science (AAAS), Vol. 309, No. 5733 ( 2005-07-15), p. 462-464
    Abstract: Devastating earthquakes occur on a megathrust fault that underlies the Tokyo metropolitan region. We identify this fault with use of deep seismic reflection profiling to be the upper surface of the Philippine Sea plate. The depth to the top of this plate, 4 to 26 kilometers, is much shallower than previous estimates based on the distribution of seismicity. This shallower plate geometry changes the location of maximum finite slip of the 1923 Kanto earthquake and will affect estimations of strong ground motion for seismic hazards analysis within the Tokyo region.
    Type of Medium: Online Resource
    ISSN: 0036-8075 , 1095-9203
    RVK:
    RVK:
    Language: English
    Publisher: American Association for the Advancement of Science (AAAS)
    Publication Date: 2005
    detail.hit.zdb_id: 128410-1
    detail.hit.zdb_id: 2066996-3
    detail.hit.zdb_id: 2060783-0
    SSG: 11
    Location Call Number Limitation Availability
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  • 4
    In: Chemistry & Biodiversity, Wiley, Vol. 18, No. 7 ( 2021-07)
    Abstract: Non‐alcoholic fatty liver disease (NAFLD) is currently the most common chronic liver disease in the world, with a prevalence of 25 % in many countries. To date, no drug has been approved to treat NAFLD, therefore, the use of phytochemicals to prevent this disease is meaningful. In this study, we focused on the effects of Moringa oleifera Lam. on diabetes, attempted to isolate compounds that regulate NAFLD. Compounds 1 and 2 were isolated from the ethyl acetate fraction of M. oleifera . Spectral data revealed that they were 1‐hydroxy‐3‐phenylpropan‐2‐yl benzoate ( 1 ) and benzyl benzylcarbamate ( 2 ), respectively. The three‐dimensional structure of compound 1 was determined by single crystal X‐ray structural analysis. Neither compound was toxic to HepG2 cells, and compound 1 was found to have a concentration‐dependent inhibitory effect on intracellular lipid accumulation induced by stimulation of linoleic acid (LA). As a result of measuring the effects of compound 1 on the intracellular lipid production‐related protein, it was found that compound 1 enhanced protein expression that promotes lipolysis. On the other hand, since the action of compound 1 was similar to that of PPARα agonists, it is deduced that compound 1 enhanced the activity of PPARα and further enhanced the expression of lipolytic proteins, which is related to the suppression of intracellular lipid accumulation. Furthermore, as the result of docking simulation, compound 1 had a higher binding affinity to the ligand binding site of PPARα than fenofibrate, which is a PPARα agonist, and thus compound 1 was considered to be promising as an agonist of PPARα.
    Type of Medium: Online Resource
    ISSN: 1612-1872 , 1612-1880
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2139001-0
    SSG: 12
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