By a News Reporter-Staff News Editor at Health & Medicine Week -- Current study results on Immunology have been published. According to news reporting originating from San Diego, California, by NewsRx correspondents, research stated, "We present a new class of ultrasound molecular imaging agents that extend upon the design of micromotors that are designed to move through fluids by catalyzing hydrogen peroxide (H2O2) and propelling forward by escaping oxygen microbubbles. Micromotor converters require 62 mm of H2O2 to move - 1000-fold higher than is expected in vivo."
Our news editors obtained a quote from the research from the University of California, "Here, we aim to prove that ultrasound can detect the expelled microbubbles, to determine the minimum H2O2 concentration needed for microbubble detection, explore alternate designs to detect the H2O2 produced by activated neutrophils and perform preliminary in vivo testing. Oxygen microbubbles were detected by ultrasound at 2.5 mm H2O2. Best results were achieved with a 400-500 nm spherical design with alternating surface coatings of catalase and PSS over a silica core. The lowest detection limit of 10-100 mu M was achieved when assays were done in plasma. Using this design, we detected the H2O2 produced by freshly isolated PMA-activated neutrophils allowing their distinction from naive neutrophils."
According to the news editors, the research concluded: "Finally, we were also able to show that direct injection of these nanospheres into an abscess in vivo enhanced ultrasound signal only when they contained catalase, and only when injected into an abscess, likely because of the elevated levels of H2O2 produced by inflammatory mediators."
For more information on this research see: Toward in vivo detection of hydrogen peroxide with ultrasound molecular imaging. Biomaterials, 2013;34(35):8918-8924. Biomaterials can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier - www.elsevier.com; Biomaterials - www.elsevier.com/wps/product/cws_home/30392)
The news editors report that additional information may be obtained by contacting E.S. Olson, University of California, Dept. of Nanoengn, San Diego, CA 92103, United States. Additional authors for this research include J. Orozco, Z. Wu, C.D. Malone, B. Yi, W. Gao, M. Eghtedari, J. Wang and R.F. Mattrey (see also Immunology).
Keywords for this news article include: Gases, Anions, Elements, San Diego, Chemistry, California, Immunology, Phagocytes, Blood Cells, Neutrophils, Electrolytes, Granulocytes, United States, Nanotechnology, Hydrogen Peroxide, Molecular Imaging, Inorganic Chemicals, Emerging Technologies, Reactive Oxygen Species, Hemic and Immune Systems
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