Anti-TF polyclonal antibody [Biotin]

Numerical study on structural performance of hybrid stainless steel stub columns are provided in this paper by utilizing finite element (FE) software, Abaqus. Two novel stainless steel grades were used viz., Lean duplex stainless steel (LDSS) and Duplex stainless steel (DSS) for hybrid stainless steel stub columns. The current investigation on hybrid stub columns consist of two configurations: (1) Hybrid stainless steel (HSS) stub column adopting DSS on the flanges and LDSS on the web; and (2) Hybrid stainless steel (HSSa) stub column using DSS and LDSS on the web and flanges respectively. The numerical results are presented in terms of column capacity (P-u) and failure modes. As observed from the investigation, both flange thickness (t(f)) and flange width (b(f)) have more influence on the column capacity for HSS stub column as compared to HSSa stub column. On the other hand, increase in web thickness (t(w)) is found to provide an enhancement in column capacity for HSSa compared to HSS stub column, in contrast to the effect of tf and bf. In general, EN 1993-1-4 Class 3 limit for internal web is observed to be reliable for all stainless steel stub columns. Based on the FE results, new DSM formulation for HSS and HSSa stub columns was proposed based on modified DSM equation for carbon steel.

Direct reprogramming without an intermediate pluripotent state has great therapeutic potential in regenerative medicine. Controlling lineage-specific transcription factors (TFs) expression can change cell fate and plasticity of somatic cells. However, traditional method of direct reprogramming using viral vector mediated gene delivery remains an obstacle for clinical application due to risk of tumorigenesis. Recently, nanomaterials have been reported to be more promising delivery systems to achieve this aim, but most of methods provide DNA-based reprogramming and the underlying mechanism of direct reprogramming remains poorly understood. Here, polyethyleneimine (PEI)-modified silica nanoparticles are developed as an efficient and safe protein transduction platform for delivering two key recombinant proteins of TFs for direct lineage reprogramming of mouse embryonic fibroblasts (MEFs) to functional induced hepatocyte-like cells (iHeps). Furthermore, the mechanisms involved in lineage reprogramming of MEFs into iHeps induced by mesoporous silica nanoparticle/polyethyleneimine/transcription factor (MSN/PEI/TF) nanocomplexes are elucidated. Epigenetic mechanistic investigations uncovered reinforced enrichment of activating marks (H3K4me3 and H3K9Ac) and loss of repressive marks (H3K27me3 and H3K9me3) at the promoters of hepatic TFs during direct hepatic reprogramming upon PEI-modified silica nanoparticles. Thus, this study provides proof of principle for silica-based nanoparticles as potentially viable and safe therapeutic strategies for direct reprogramming in regenerative medicine. (C) 2020 Elsevier Ltd. All rights reserved.