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Levamisole inactive in treatment of four animal tumours 总被引:3,自引:0,他引:3
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Chase M. H. McGinty D. J. Sterman M. B. 《Cellular and molecular life sciences : CMLS》1968,24(1):47-48
Zusammenfassung In frei beweglichen Katzen wurden Veränderungen des Reflexes zum Musculus massetericus während des Schlafes und im Wachzustand untersucht. Eine graduelle Abnahme der Amplitude des Reflexes wurde beobachtet, wenn die Tiere vom Wachzustand über eine «schläfrige Phase» (drowsy state) in die sogenannte «ruhige Schlafphase» (quiet sleep) gelangten. Während des paradoxalen Schlafes (active sleep) waren die Amplituden der Reflexpotentiale hochgradig herabgesetzt.
This research was supported by a grant from the USPHS (MH-10083) and by the Veterans Administration.
This work has received bibliographic aid from the UCLA Brain Information Service which is a part of the National Information Network of the NINDB, and supported under Contract No. PH-43-66-59. 相似文献
This research was supported by a grant from the USPHS (MH-10083) and by the Veterans Administration.
This work has received bibliographic aid from the UCLA Brain Information Service which is a part of the National Information Network of the NINDB, and supported under Contract No. PH-43-66-59. 相似文献
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I. Carr F. McGinty C. Potter S. Westby 《Cellular and molecular life sciences : CMLS》1974,30(2):185-186
Résumé L'injection de 5 millions de cellules tumorales RD3 dans la patte du rat, fait apparaître des dépôts métastasique sous forme de ganglions lymphatiques poplitétaux. L'examen histologique détaillé montre qu'ils sont vraies métastases. Des résultats pareils sont apparus dans 2 autres tumeurs qui étaient histologiquement malignes, mais non dans celles qui étaient bénignes. Cette technique semble convenir à étude de la métastase lymphatique. 相似文献
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Numerous post-translational modifications of histones have been described in organisms ranging from yeast to humans. Growing evidence for dynamic regulation of these modifications, position- and modification-specific protein interactions, and biochemical crosstalk between modifications has strengthened the 'histone code' hypothesis, in which histone modifications are integral to choreographing the expression of the genome. One such modification, ubiquitylation of histone H2B (uH2B) on lysine 120 (K120) in humans, and lysine 123 in yeast, has been correlated with enhanced methylation of lysine 79 (K79) of histone H3 (refs 5-8), by K79-specific methyltransferase Dot1 (KMT4). However, the specific function of uH2B in this crosstalk pathway is not understood. Here we demonstrate, using chemically ubiquitylated H2B, a direct stimulation of hDot1L-mediated intranucleosomal methylation of H3 K79. Two traceless orthogonal expressed protein ligation (EPL) reactions were used to ubiquitylate H2B site-specifically. This strategy, using a photolytic ligation auxiliary and a desulphurization reaction, should be generally applicable to the chemical ubiquitylation of other proteins. Reconstitution of our uH2B into chemically defined nucleosomes, followed by biochemical analysis, revealed that uH2B directly activates methylation of H3 K79 by hDot1L. This effect is mediated through the catalytic domain of hDot1L, most likely through allosteric mechanisms. Furthermore, asymmetric incorporation of uH2B into dinucleosomes showed that the enhancement of methylation was limited to nucleosomes bearing uH2B. This work demonstrates a direct biochemical crosstalk between two modifications on separate histone proteins within a nucleosome. 相似文献
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