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Sökning: WFRF:(Aman J.)

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51.
  • Aman, Y, et al. (författare)
  • Autophagy in healthy aging and disease
  • 2021
  • Ingår i: Nature aging. - : Springer Science and Business Media LLC. - 2662-8465. ; 1:8, s. 634-650
  • Tidskriftsartikel (refereegranskat)
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52.
  • Banerjee, Indradumna, 1986-, et al. (författare)
  • LDH based neonatal diagnostics on a low-cost slipdisc based sample preparation platform.
  • 2016
  • Konferensbidrag (refereegranskat)abstract
    • INTRODUCTIONSlipdisc is developed as a sample preparation platform based on slipchip technology [1], using a handwinded clockwork mechanism allowing sample processing from one spot to another with defined precision without the need for sophisticated tools or alignment (Fig.1). An ordinary smartphone or camera can be used to image and analyse the results making it an ideal tool for resource limited settings. Here, we demonstrate a bioassay for detecting LDH (Fig.2), a crucial enzyme found in all living cells which leaks out when the cellular membrane is damaged. This makes LDH a biomarker for several medical conditions in newborns, such as Ozkiraz-13, necrotizing enterocolitis (NEC), and Asphyxia.EXPERIMENTALFor assembling the slipdisc optically transparent, robust and disposable CD like polycarbonate discs were used with superhydrophobic coating on all except the embedded microfluidic channels. For the LDH assay, heparinized plasma samples were spiked with 7 different concentrations of the LDH enzyme (Lee Biosolutions, USA). These concentrations ranged from clinically normal to abnormal concentrations and used to construct a standard curve for LDH enzyme.RESULTS AND DISCUSSIONThe ability of the SlipDisc to quantify LDH enzyme levels from plasma samples was evaluated (Fig.3). Using 7 different concentrations, a standard curve with clinically relevant LDH concentrations was obtained (Fig4). Image and data analyses, including linear regression and Pearson’s correlation, were completed using Image processing tool in Matlab.CONCLUSIONWe demonstrate a low-cost neonatal diagnostics platform for the detection of LDH from plasma using a novel SlipDisc platform. The SlipDisc can further be modified to separate plasma from whole blood samples in order to fully integrate the assay. Its simple operation and smartphone based detection capabilities make it an ideal device for point-of-care neonatal diagnostics.
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54.
  • Boija, Ann, et al. (författare)
  • CBP Regulates Recruitment and Release of Promoter-Proximal RNA Polymerase II
  • 2017
  • Ingår i: Molecular Cell. - : Elsevier BV. - 1097-2765 .- 1097-4164. ; 68:3, s. 491-503.e5
  • Tidskriftsartikel (refereegranskat)abstract
    • Transcription activation involves RNA polymerase II (Pol II) recruitment and release from the promoter into productive elongation, but how specific chromatin regulators control these steps is unclear. Here, we identify a novel activity of the histone acetyltransferase p300/CREB-binding protein (CBP) in regulating promoter-proximal paused Pol II. We find that Drosophila CBP inhibition results in "dribbling" of Pol II from the pause site to positions further downstream but impedes transcription through the +1 nucleosome genome-wide. Promoters strongly occupied by CBP and GAGA factor have high levels of paused Pol II, a unique chromatin signature, and are highly expressed regardless of cell type. Interestingly, CBP activity is rate limiting for Pol II recruitment to these highly paused promoters through an interaction with TFIIB but for transit into elongation by histone acetylation at other genes. Thus, CBP directly stimulates both Pol II recruitment and the ability to traverse the first nucleosome, thereby promoting transcription of most genes.
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