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The self-assembly of Escherichia coli RNA polymerase σ 70 subunit was investigated using several experimental approaches. A novel rodlike shape was reported for σ 70 subunit aggregates. Atomic force microscopy reveals that these aggregates, or σ 70 polymers, have a straight rodlike shape 5.4...
The present study demonstrates the applicability of a novel strategy that employs targeted delivery of combined treatment against tumor neovasculature. Briefly, a ligand of integrins, cyclic arginine-glycine-aspartic acid-tyrosine-lysine pentapeptide (cRGDyK), was conjugated to the PEG end of...
Formulations of antioxidant enzymes, superoxide dismutase 1 (SOD1, also known as Cu/Zn SOD) and catalase were prepared by electrostatic coupling of enzymes with cationic block copolymers, polyethyleneimine-poly(ethylene glycol) or poly(L-lysine)-poly(ethylene glycol), followed by covalent...
The pharmacokinetics, biodistribution, and antitumor efficacy of three doxorubicin formulations (doxorubicin in saline, conjugated to a polylysine dendrimer, and encapsulated within a stealth liposome) were investigated in Walker 256 tumor-bearing rats. Liposomal and dendrimer-based delivery...
Synthesis of nanosized particles with antibacterial properties is of great interest in the development of new pharmaceutical products. Silver nanoparticles (Ag NPs) are known to have inhibitory and bactericidal effects. In this article we present the synthesis of Ag NPs prepared by chemical...
The different transport pathways of 5-nm polymer-coated gold nanoparticles (Au NPs) crossing epithelial Caco-2 cell monolayers were explored. We found that the majority of cationic and neutral Au NPs depended heavily on endocytosis for cellular uptake and transport, and the anionic charged...
The in vivo efficacy of doxorubicin (DOX)-loaded poly(γ-benzyl l -glutamate)- block -hyaluronan (PBLG 23 - b -HYA 10 )-based polymersomes (PolyDOX) was evaluated. Samples were efficiently labeled with technetium-99m radionuclide with good stability for in vivo studies. PolyDOX enhanced...
Radiolabeled PEGylated liposomal nanoparticles (NPs) open new possibilities for a variety of applications including diagnosis, drug delivery, targeted therapy, and monitoring treatment effects. Here we describe the characterization of liposomal NPs (liposomes and micelles) derivatized with the...
Studying living bacteria at the nanoscale in their native liquid environment opens an unexplored landscape. We focus on Pseudomonas aeruginosa and demonstrate how the cell wall is biophysically affected at the nanoscale by two reference antibiotics (ticarcillin and tobramycin). The elasticity of...
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