Findings on Ischemia Reported by Researchers at Kyoto Pharmaceutical University (Pharmacokinetics and preventive effects of platinum nanoparticles as reactive oxygen species scavengers on hepatic ischemia/reperfusion injury in mice)
By a News Reporter-Staff News Editor at Biotech Week -- Investigators publish new report on Ischemia. According to news originating from Kyoto, Japan, by NewsRx correspondents, research stated, "Reactive oxygen species (ROS) are involved in the pathophysiology of ischemia/reperfusion injury. To protect mouse hepatocytes from ischemia/reperfusion injury, we prepared two different sizes of citric acid-protected platinum nanoparticles (Pt-NPs), which exhibited ROS-scavenging activities and selective delivery to a specific type of liver cell."
Our news journalists obtained a quote from the research from Kyoto Pharmaceutical University, "Small Pt-NPs (30 nm) reduced the superoxide anion, hydrogen peroxide, and hydroxyl radical levels in solution to a greater extent than did large Pt-NPs (106 nm). Large and small Pt-NPs predominantly accumulated in hepatic nonparenchymal cells after intravenous injection into mice. In a mouse model of ischemia/reperfusion injury, in which hepatic injury was induced by occluding the portal vein for 15 min followed by 6 h reperfusion, the increase in plasma alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activities was inhibited by a bolus intravenous injection of either large or small Pt-NPs. However, small Pt-NPs inhibited the increase in these markers of hepatic injury to a greater extent than did large Pt-NPs. These results indicate that Pt-NPs can be used to prevent hepatic ischemia/reperfusion injury."
According to the news editors, the research concluded: "To our knowledge, this is the first report demonstrating the pharmacokinetics and efficacy of Pt-NPs to prevent hepatic ischemia/reperfusion injury."
For more information on this research see: Pharmacokinetics and preventive effects of platinum nanoparticles as reactive oxygen species scavengers on hepatic ischemia/reperfusion injury in mice. Metallomics, 2014;6(5):1050-6. (Royal Society of Chemistry - www.rsc.org/; Metallomics - pubs.rsc.org/en/journals/journalissues/mt)
The news correspondents report that additional information may be obtained from H. Katsumi, Dept. of Biopharmaceutics, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan. Additional authors for this research include K. Fukui, K. Sato, S. Maruyama, S. Yamashita, E. Mizumoto, K. Kusamori, M. Oyama, M. Sano, T. Sakane and A. Yamamoto (see also Ischemia).
Keywords for this news article include: Asia, Pharmaceuticals, Kyoto, Japan, Drugs, Therapy, Ischemia, Chalcogens, Nanoparticle, Free Radicals, Nanotechnology, Oxygen Compounds, Pharmacokinetics, Emerging Technologies, Reactive Oxygen Species.
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