423763-19-3Relevant articles and documents
High-purity discrete PEG-oligomer crystals allow structural insight
French, Alister C.,Thompson, Amber L.,Davis, Benjamin G.
supporting information; experimental part, p. 1248 - 1252 (2009/06/30)
To great (monodisperse) lengths: An improved synthesis of purer ethylene glycol (EG) oligomers allows access to 16- and 32-mers pure enough for multiple incorporation, and also to the longest (48-mer) discrete EG oligomer yet reported. The high purity enables the first crystallizations and hence the first glimpses of secondary 310-helical PEG structures.
Synthesis of bifunctional integrin-binding peptides containing PEG spacers of defined length for non-viral gene delivery
Pilkington-Miksa, Michael A.,Sarkar, Supti,Writer, Michele J.,Barker, Susie E.,Shamlou, Parviz Ayazi,Hart, Stephen L.,Hailes, Helen C.,Tabor, Alethea B.
experimental part, p. 2900 - 2914 (2009/04/11)
Improving the buffer and serum stability of non-viral gene delivery vectors, and increasing their circulation time in vivo, is an important focus of current research in gene therapy. The most successful strategies to date have involved shielding the complexes with large polydisperse PEG adducts. However, this approach is accompanied by a fall in transfection efficiency. In this paper we describe the solid-phase synthesis of a series of bifunctional peptides bearing short PEG spacers of defined structure as components of lipopolyplex gene delivery vectors. Short, high-yielding routes to a series of PEG-amino acids are described: these PEG-amino acids can be used in varying combinations to afford bifunctional peptides with varying lengths of PEG spacers by using standard solid-phase synthesis techniques. A series of lipopolyplexes were formulated using these bifunctional peptides, and their transfection properties assessed. Dynamic light scattering measurements on the complex with the best transfection properties showed that in phosphate-buffered saline this complex was considerably more stable, and aggregated more slowly, than a complex formulated using a similar peptide lacking the short PEG spacer. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.
Bna Conjugates and Methods of Use
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Page/Page column 32, (2008/12/08)
Modified natriuretic compounds and conjugates thereof are disclosed in the present invention. In particular, conjugated forms of hBNP are provided that include at least one modifying moiety attached thereto. The modified natriuretic compound conjugates retain activity for stimulating cGMP production, binding to NPR-A receptor, decreasing arterial blood pressure and in some embodiments an improved half-life in circulation as compared to unmodified counterpart natriuretic compounds. Oral, parenteral, enteral, subcutaneous, pulmonary, and intravenous forms of the compounds and conjugates may be prepared as treatments and/or therapies for heart conditions particularly congestive heart failure. Modifying moieties comprising oligomeric structures having a variety of lengths and configurations are also disclosed. Analogs of the hBNP compound are also disclosed, having an amino acid sequence that is other than the native sequence.
Components for Tethered Bilayer Membranes: Synthesis of Hydrophilically Substituted Phytanol Derivatives
Burns, Christopher J.,Field, Leslie D.,Morgan, Jacqueline,Petteys, Brian J.,Prashar, Jognandan,Ridley, Damon D.,Sandanayake, K.R.A. Samankumara,Vignevich, Valentina
, p. 431 - 438 (2007/10/03)
In order to optimize the performance of the AMBRI biosensor (Nature 1997, 387, 580), a variety of hydrophilic linkers between the hydrophobic bilayer membrane and the gold surface have been synthesized. The principal components are prepared from phytanyl hemisuccinate, which is linked by repeating ethylene glycol or propylene glycol units to a second succinic acid unit. The syntheses of analogous substances in which the ester links are replaced by amide and by ether links are also described.
