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Full-Text Articles in Biomedical Engineering and Bioengineering
A Synthesis Platform For Temperature Responsive Star Polymers, Schmitt J. Richard Jr.
A Synthesis Platform For Temperature Responsive Star Polymers, Schmitt J. Richard Jr.
ETD Archive
Star polymers are a class of branched polymers comprised of several polymer chains extending from a central point. Star polymers have applications in biopharmaceuticals where they have been proposed to be suitable drug delivery vehicles. Star polymers have traditionally been synthesized through chemical synthesis with added functionality provided by grafting on the arms. This complex synthesis can be simplified by using a biosynthetic approach which enables precise control of molecular weight and composition. This approach is demonstrated using star polymers with arms composed of a temperature responsive protein-based polymer termed elastin-like polypeptide (ELP). Star polymers are characterized based on the …
Stabilization Of Hypoxia Inducible Factor By Cobalt Chloride Can Alter Renal Transepithelial, Subhra Sankar Nag
Stabilization Of Hypoxia Inducible Factor By Cobalt Chloride Can Alter Renal Transepithelial, Subhra Sankar Nag
ETD Archive
Kidney cyst expansion, stagnant fluid accumulation, and insufficient vascular supply can result in localized chronic ischemia-hypoxia in kidney cysts, as well as in normal renal epithelia adjacent to a cyst. We hypothesize that in normal epithelia near a cyst, the stabilization of Hypoxia Inducible Factor 1a (HIF1a), a major regulator of cellular response to hypoxia, can cause altered paracellular and transcellular transport, transforming a normal absorptive phenotype to a secretory and paracellularly leaky phenotype, leading to cyst expansion. Using 100 µmol/L cobalt chloride (CoCl2), HIF1a was stabilized in cellular nucleus of a mouse cortical collecting duct cell line (mCCD 1296 …