The Editor-in-Chief wishes the readers a very happy, enjoyable, and successful new year and announces the imminent appointment of four new Associate Editors.
The 2nd International Nanomedicine Conference in Coogee was held in July 2011, and brought together the top minds in a discipline that crosses borders incorporating medicine, chemistry, and engineering. This Research Front, dedicated to Nanomedicine, comprises a selection of papers epitomizing the current sentiments in this emerging field.
Specific killing of cancer cells using enhanced permeability retention effect (EPR) efficacy , with reduced side effects was studied during the recent developments in nano-technology. This review discussed the active targeting towards cancer cell with specific ligands incorporated in biodegradable polymeric nanocarriers to improve the bio-activity of the encapsulated cargo.
A novel particulate delivery vehicle based on the degradable biopolymer dextran was used to safely transport genetic material across cell membranes. The biocompatibility and its unique tunability differentiate this new carrier system from previous particle systems, showing high potential for the treatment of several disease models in RNA interference related applications.
Hydrophilically substituted diterpenes of the structural class of serrulatanes have attracted attention as novel antibacterial compounds. Two highly active serrulatanes convert into orange products upon separation from the plant resin extract, and this oxidative instability may be related to the mechanism of antibacterial action.
Reductively degradable hyperbranched polymers with multiple peripheral alkyl bromide groups were synthesized by the radical copolymerization of di- or oligo(ethylene oxide) methyl ether methacrylate with the disulfide-containing crosslinker bis(2-methacryloyloxyethyl)disulfide. The polymers were used as multifunctional atom-transfer radical polymerization macroinitiators, which were chain-extended to yield star copolymers with hyperbranched disulfide-containing cores. Both the macroinitiators and the star copolymers derived from them degraded in the presence of a reducing agent.
Multivalent and monovalent vaccine candidates were synthesized with the help of an azide alkyne cycloaddition (click) reaction and their ability to self-assemble under aqueous conditions was examined. The LCP conjugates possessing two different epitopes, in contrast to monoepitopic constructs, formed potentially more immunogenic small nanoparticles (5–15 nm) presumably owing to a suitable hydrophilic-hydrophobic balance of the molecules.
Superparamagnetic iron oxide nanoparticles (SPIONs) have gained great interest in the biomedical field due to their biocompatibility and unique magnetic properties. In this work, a green method using the supercritical antisolvent system was successfully employed to produce encapsulated SPIONs of diameters less than 200 nm with an encapsulation efficiency of 70 %.
We have developed a novel method for activating T-cells on material surfaces that enable individual and population-based analyses of T-cell signalling events. The analysis of individual T cells on material surfaces provides the capacity to assess the magnitude and quality of inherently heterogeneous effector T-cell responses to antigenic challenge.
[Ag2(mptrz)(μ3-X)]n (X = I (1) and Br (2)) and [Pb4(μ4-O)(mptrz)4(μ2-X)] (X = I (3) and Cl (4)) have been synthesized. Compounds 1 and 2 have 2D layered structures with unique inorganic [Ag2X2]n chains. Compounds 3 and 4 are discrete tetranuclear lead(ii) cluster compounds featuring oxygen-centred Pb4(µ4-O) tetrahedra. All compounds display fluorescent emission.
The one-step conversion of benzopyranones to the heptacyclic spiroacetal core of cynandione B using methylmagnesium bromide has been achieved. The process involves a tandem Grignard addition/aldol/spiroacetal forming reaction sequence. X-ray crystal structure analysis has established the relative configuration in these novel heterocyclic products.
Calendula oil/chitosan microcapsules prepared by simple coacervation are reported. The optimal parameter combinations are determined. The in vitro and in vivo toxicity evaluation demonstrate that the microcapsules exhibit no significant toxicological effects on human keratinocytes and mice. The microcapsules are suggested as safe drug carriers both topically and orally.
The self-assembly of silver nanoparticles using triglycine as an organic template, and their subsequent self-assembly into one-dimensional nanostructures under ambient temperature in the presence of copper cations is reported.
We describe a simple, efficient, and green method for the synthesis of perimidine derivatives from various ketones and naphthalene-1,8-diamine using bis(oxalato)boric acid (HBOB) as a catalyst. The methodology provides an easily handled and recyclable catalyst for this type of reaction as an alternative platform to the conventional acid-catalyzed thermal processes.
Sulfuryl chloride is a useful alternative to chlorine gas in chlorination reactions, however, it is a neglected reagent in the synthesis community. This focus article describes the application of sulfuryl chloride as an effective chlorinating agent with some comparison to alternative reagents.