Patents Assigned to makoto yuasa
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Publication number: 20140061063Abstract: An electrode for active oxygen species comprising a conductive component with a polymer membrane of a metal porphyrin complex formed on the surface is disclosed. The electrode for active oxygen species can detect active oxygen species such as superoxide anion radicals, hydrogen peroxide, and .OH and other active radical species (NO, ONOO—, etc.) in any environment including in vivo environment as well as in vitro environment. The electrode thus can be used for specifying various diseases and examining active oxygen species in food or in water such as tap water and sewage water.Type: ApplicationFiled: November 4, 2013Publication date: March 6, 2014Applicants: Makoto Yuasa, Hitoshi Takebayashi, Masahiko AbeInventors: Makoto Yuasa, Masahiko Abe, Aritomo Yamaguchi, Asako Shiozawa, Masuhide Ishikawa, Katsuya Eguchi, Shigeru Kido
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Publication number: 20120145562Abstract: An electrode for superoxide anions which contains a conductive component and, superimposed on a surface thereof, a film resulting from electrolytic polymerization of a metal thiofurylporphyrin/axial ligand complex; and a sensor for measuring a superoxide anion concentration including the same. The electrode for superoxide anions can prevent poisoning by a catalyst poison such as hydrogen peroxide. Accordingly, in any of in vitro or in vivo environments, this electrode for superoxide anions enables detection of superoxide anion radicals without suffering any influence from a catalyst poison such as hydrogen peroxide. Moreover, quantitative assay of superoxide anions can be performed with this electrode for superoxide anion in combination with a counter electrode or a reference electrode. Thus, this electrode for superoxide anions can find wide applicability in various fields.Type: ApplicationFiled: October 11, 2011Publication date: June 14, 2012Applicant: Makoto YuasaInventors: Makoto Yuasa, Kenichi Oyaizu, Aritomo Yamaguchi, Masuhide Ishikawa, Katsuya Eguchi, Tomohiro Kobayashi, Satoshi Tsutsui, Yuujirou Toyoda
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Publication number: 20120039987Abstract: A niosome having a metalloporphyrin complex embedded therein comprising a cationized metalloporphyrin complex and a niosome-forming substance. The niosome having a metalloporphyrin complex embedded therein has an SOD activity, can interact with superoxide anionic radicals (O2?.) as a target, and can reduce these radicals without fail. The niosome having a metalloporphyrin complex embedded therein can reach cells in living bodies such as cancer cells due to properties of a niosome. Therefore, the niosome having a metalloporphyrin complex embedded therein can exhibit an excellent effect of treating cancer by reducing O2?. in cancer cells. In addition, since the effect is selective, the niosome can be used as a novel anticancer agent without side effects. Moreover, the niosome having a metalloporphyrin complex embedded therein can be retained in the blood while exhibiting a superior antioxidation effect. The niosome can thus protect living bodies from hindrance brought about by active oxygen species.Type: ApplicationFiled: July 14, 2011Publication date: February 16, 2012Applicant: Makoto YUASAInventors: MAKOTO YUASA, KENICHI OYAIZU, ARITOMO YAMAGUCHI, YUKIHIRO HANYUU, KAZUNORI KASAHARA, MASAYASU KOMURO
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Publication number: 20110315551Abstract: An electrode for active oxygen species comprising a conductive component with a polymer membrane of a metal porphyrin complex formed on the surface is disclosed. The electrode for active oxygen species can detect active oxygen species such as superoxide anion radicals, hydrogen peroxide, and .OH and other active radical species (NO, ONOO—, etc.) in any environment including in vivo environment as well as in vitro environment. The electrode thus can be used for specifying various diseases and examining active oxygen species in food or in water such as tap water and sewage water.Type: ApplicationFiled: September 6, 2011Publication date: December 29, 2011Applicants: Makoto YUASA, Hitoshi TAKEBAYASHI, Masahiko ABEInventors: Makoto YUASA, Masahiko ABE, Aritomo Yamaguchi, Asako Shiozawa, Masuhide Ishikawa, Katsuya Eguchi, Shigeru Kido
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Publication number: 20080289960Abstract: An electrode for superoxide anions characterized by comprising a conductive component and, superimposed on a surface thereof, a film resulting from electrolytic polymerization of a metal thiofurylporphyrin/axial ligand complex; and a sensor for measuring a superoxide anion concentration including the same. The electrode for superoxide anions, by virtue of not only the excellent performance of electrode provided with the metal porphyrin complex polymer film, but also the presence of the axial ligand, can prevent poisoning by a catalyst poison such as hydrogen peroxide. Accordingly, in any of in vitro or in vivo environments, this electrode for superoxide anions enables detection of superoxide anion radicals without suffering any influence from a catalyst poison such as hydrogen peroxide. Moreover, quantitative assay of superoxide anions can be performed by the use of this electrode for superoxide anion in combination with a counter electrode or a reference electrode.Type: ApplicationFiled: March 12, 2004Publication date: November 27, 2008Applicant: Makoto YuasaInventors: Makoto Yuasa, Kenichi Oyaizu, Aritomo Yamaguchi, Masuhide Ishikawa, Katsuya Eguchi, Tomohiro Kobayashi, Satoshi Tsutsui, Yuujirou Toyoda
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Publication number: 20050077192Abstract: An electrode for active oxygen species comprising a conductive component with a polymer membrane of a metal porphyrin complex formed on the surface is disclosed. The electrode for active oxygen species can detect active oxygen species such as superoxide anion radicals, hydrogen peroxide, and .OH and other active radical species (NO, ONOO—, etc.) in any environment including in vivo environment as well as in vitro environment. The electrode thus can be used for specifying various diseases and examining active oxygen species in food or in water such as tap water and sewage water.Type: ApplicationFiled: December 19, 2002Publication date: April 14, 2005Applicant: makoto yuasaInventors: Makoto Yuasa, Masahiko Abe, Aritomo Yamaguchi, Asako Shiozawa, Masuhide Ishikawa, Katsuya Eguchi, Shigeru Kido
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Publication number: 20050008687Abstract: An metalloporphyrin-complex-embedded liposome, comprising a cationic metalloporphyrin complex and a lipid having liposome forming ability is disclosed. As metalloporphyrin-complex-embedded liposomes according to the present invention act on superoxide anion radicals (O2?), and can surely lower their concentration, they can exhibit superb effects for the treatment of cancers and have excellent characteristics as antioxidants.Type: ApplicationFiled: March 1, 2004Publication date: January 13, 2005Applicant: Makoto YuasaInventors: Makoto Yuasa, Noriyoshi Matsukura, Aritomo Yamaguchi, Hiroyoshi Kawakami, Shoji Nagaoka, Masahiko Abe, Hitoshi Takebayashi, Aiko Horiuchi, Akihiko Ogata, Takeshi Sakaya