Myc belongs to a family of proto-oncogenes that encode transcription *** overexpression of c-Myc causes many types of ***,we established a system for screening c-Myc inhibitors and identified antimycin A by screening ...
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Myc belongs to a family of proto-oncogenes that encode transcription *** overexpression of c-Myc causes many types of ***,we established a system for screening c-Myc inhibitors and identified antimycin A by screening the RIKEN NPDepo chemical *** specific mechanism of promoting tumor cell metastasis by high c-Myc expression remains to be *** this study,we screened approximately 5,600 microbial extracts using this system and identified a broth prepared from Streptomyces ***19-A0402 strongly inhibits c-Myc transcriptional *** purification of the hit broth,we identified compounds closely related to the aglycone of cytovaricin and had a structure similar to that of oligomycin *** to oligomycin A,the hit compounds inhibited mitochondrial complex *** mitochondria dysfunction caused by the compounds induced the production of reactive oxygen species(ROS),and the ROS activated GSK3α/βthat phosphorylated c-Myc for *** study provides a successful screening strategy for identifying natural products as potential c-Myc inhibitors as potential anticancer agents.
Exhausted CD8^(+)T(Tex)cells are dysfunctional due to persistent antigen exposure in chronic viral infection and tumor contexts.A stem cell-like Tex(Tex-stem)subset can self-renew and differentiate into terminally exh...
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Exhausted CD8^(+)T(Tex)cells are dysfunctional due to persistent antigen exposure in chronic viral infection and tumor contexts.A stem cell-like Tex(Tex-stem)subset can self-renew and differentiate into terminally exhausted(Tex-term)***,we show that ectopic Tcf1 expression potently promoted the generation of Tex-stem cells in both a chronic viral infection and preclinical tumor ***1 overexpression diminished coinhibitory receptor expression and enhanced polycytokine-producing capacity while retaining a heightened responses to checkpoint blockade,leading to enhanced viral and tumor ***,ectopically expressed Tcf1 exploited existing and novel chromatin accessible sites as transcriptional enhancers or repressors and modulated the transcriptome by enforcing pre-existing expression patterns in Tex-stem cells,such as enhanced suppression of Blimp1 and Bim and acquisition of new downstream genes,including Mx1,Tox2,and *** findings reveal a pronounced impact of ectopic Tcf1 expression on Tex functional restoration and highlight the therapeutic potential of harnessing Tcf1-enforced transcriptional programs.
The new potential model of interlayer intermolecular interaction was proposed to represent“ABAB”stacking of *** bombardment of hydrogen atoms on the graphite surface was investigated using molecular dynamics *** the...
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The new potential model of interlayer intermolecular interaction was proposed to represent“ABAB”stacking of *** bombardment of hydrogen atoms on the graphite surface was investigated using molecular dynamics *** the first graphene fromthe surface side was broken,the hydrogen atoms caused the following *** the case of the incident energy of 5 eV,many hydrogen atoms were adsorbed on the front of the first *** the case of the incident energy of 15 eV,almost all hydrogen atoms were reflected by the first *** the case of the incident energy of 30 eV,the hydrogen atoms were adsorbed between the first and second *** radial distribution function and the animation of the MD simulation demonstrated that the graphenes were peeled off one by one,which is called graphite *** C2H2 was generated in such chemical *** the other yieldedmolecules often had chain structures terminated by the hydrogen *** erosion yield increased linearly with time.
Five ferruginous deposit samples formed from neutral hot springs were analyzed to determine whether they consisted of a mixture of silica, hydrous iron oxide or iron silicate by differential thermal analysis (DTA), in...
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Five ferruginous deposit samples formed from neutral hot springs were analyzed to determine whether they consisted of a mixture of silica, hydrous iron oxide or iron silicate by differential thermal analysis (DTA), infrared (IR) spectroscopy, powder X-ray diffraction (XRD), and 57Fe Mssbauer spectroscopy. The Si/Fe atomic ratios of the deposits ranged from 0.25 to 0.45, and were smaller than those of hisingerite (12), but apparently close to those of siliceous ferrihydrite (0.250.5). Si was confirmed to be present as monomeric or oligomeric silicate from the Si-O stretching vibration frequencies on the IR spectra. Judging from the results of DTA, which minerals starting to produce after heating, and a relationship between Si-O stretching vibration frequency and Si/Fe atomic ratio proposed by Henmi et al. (1981), all the deposits in this study were concluded to be mixtures of various siliceous ferri-hydrites with low and high Si/Fe atomic ratios. Moreover, by comparing the chemical properties of hot spring waters, the formation conditions of siliceous ferrihydrite were also discussed.
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