Patents by Inventor Mitsuhiro Hoshijima

Mitsuhiro Hoshijima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7824881
    Abstract: The present invention relates to a technique for measuring a glucose level by utilizing a reaction system containing an enzyme and an electron carrier. In accordance with the glucose level measuring method of the present invention, glucose dehydrogenase with cytochrome C attached thereto or glucose dehydrogenase derived from a microorganism belonging to a burkholderia genus is used as the enzyme, and a Ru compound is used as the electron carrier. The present invention further provides a glucose sensor in which glucose dehydrogenase with cytochrome C attached thereto or glucose dehydrogenase derived from derived from a microorganism belonging to a burkholderia genus is used as the enzyme, and a Ru compound is used as the electron carrier.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: November 2, 2010
    Assignee: ARKRAY, Inc.
    Inventors: Hideaki Yamaoka, Mitsuhiro Hoshijima, Tomomichi Tsujimoto
  • Patent number: 7780828
    Abstract: The present invention relates to an analytical instrument (1) which includes a flow path (5) for moving a sample containing blood cells, an introduction port (50) for introducing the sample into the flow path (5), a reagent portion (51) arranged in the flow path (5), and an electron detection medium (52) for obtaining information necessary for analyzing an analysis target component contained in the sample in relation with an amount of electrons transferred. The reagent portion (51) contains an electron mediator for supplying an electron taken from the analysis target component in the sample to the electron detection medium (52), and at least part of the reagent portion is positioned adjacent to the introduction port (50).
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: August 24, 2010
    Assignee: ARKRAY, Inc.
    Inventors: Hideaki Yamaoka, Kenji Nagakawa, Mitsuhiro Hoshijima, Sadaaki Kimura
  • Patent number: 7713718
    Abstract: A process for producing glucose dehydrogenases. This process comprises transferring a DNA containing a sequence represented by SEQ ID NO:1 which encodes an ? subunit having a glucose dehydrogenase activity and a ? subunit being an electron transfer protein into a microorganism belonging to the genus Pseudomonas to thereby construct a transformant, and culturing this transformant so as to allow the production of a first glucose dehydrogenase containing the above-described ? subunit and a second glucose dehydrogenase free from the ? subunit. The ? subunit as described above has a molecular weight of about 60 kDa measured by, for example, SDS-polyacrylamide gel electrophoresis under reducing conditions, while the ? subunit as described above has a molecular weight of about 43 kDa measured by, for example, SDS-polyacrylamide gel electrophoresis under reducing conditions.
    Type: Grant
    Filed: August 20, 2003
    Date of Patent: May 11, 2010
    Assignee: ARKRAY, Inc.
    Inventors: Koji Sode, Hideaki Yamaoka, Mitsuhiro Hoshijima, Keisuke Kurosaka, Shido Kawase
  • Publication number: 20090017483
    Abstract: The present invention relates to an analytical instrument (1) which includes a flow path (5) for moving a sample containing blood cells, an introduction port (50) for introducing the sample into the flow path (5), a reagent portion (51) arranged in the flow path (5), and an electron detection medium (52) for obtaining information necessary for analyzing an analysis target component contained in the sample in relation with an amount of electrons transferred. The reagent portion (51) contains an electron mediator for supplying an electron taken from the analysis target component in the sample to the electron detection medium (52), and at least part of the reagent portion is positioned adjacent to the introduction port (50).
    Type: Application
    Filed: January 7, 2005
    Publication date: January 15, 2009
    Inventors: Hideaki Yamaoka, Kenji Nagakawa, Mitsuhiro Hoshijima, Sadaaki Kimura
  • Publication number: 20080131919
    Abstract: The present invention relates to a technique for measuring a glucose level by utilizing a reaction system containing an enzyme and an electron carrier. In accordance with the glucose level measuring method of the present invention, glucose dehydrogenase with cytochrome C attached thereto or glucose dehydrogenase derived from a microorganism belonging to a burkholderia genus is used as the enzyme, and a Ru compound is used as the electron carrier. The present invention further provides a glucose sensor in which glucose dehydrogenase with cytochrome C attached thereto or glucose dehydrogenase derived from derived from a microorganism belonging to a burkholderia genus is used as the enzyme, and a Ru compound is used as the electron carrier.
    Type: Application
    Filed: January 10, 2008
    Publication date: June 5, 2008
    Applicant: ARKRAY, Inc.
    Inventors: Hideaki Yamaoka, Mitsuhiro Hoshijima, Tomomichi Tsujimoto
  • Patent number: 7341846
    Abstract: The present invention relates to a technique for measuring a glucose level by utilizing a reaction system containing an enzyme and an electron carrier. In accordance with the glucose level measuring method of the present invention, glucose dehydrogenase with cytochrome C attached thereto or glucose dehydrogenase derived from a microorganism belonging to a burkholderia genus is used as the enzyme, and a Ru compound is used as the electron carrier. The present invention further provides a glucose sensor in which glucose dehydrogenase with cytochrome C attached thereto or glucose dehydrogenase derived from derived from a microorganism belonging to a burkholderia genus is used as the enzyme, and a Ru compound is used as the electron carrier.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: March 11, 2008
    Assignee: Arkray, Inc.
    Inventors: Hideaki Yamaoka, Mitsuhiro Hoshijima, Tomomichi Tsujimoto
  • Publication number: 20070053790
    Abstract: The present invention relates to an analyzing tool (X1) including a reaction space (4) for allowing a particular component contained in a sample and a reagent to react with each other, and a reagent portion (51, 52) which is arranged in the reaction space (4) and which dissolves when the sample is supplied to the reaction space (4). The reagent portion (51, 52) includes a first part (51) and a second part (52) facing each other at a defining surface defining the reaction space (4).
    Type: Application
    Filed: April 15, 2004
    Publication date: March 8, 2007
    Applicant: ARKRAY, INC.
    Inventors: Kenji Nagakawa, Masaaki Teramoto, Yoshiyuki Kawase, Mitsuhiro Hoshijima
  • Publication number: 20060194278
    Abstract: A glucose dehydrogenase complex is produced by culturing an Escherichia bacterium, which is introduced with DNAs encoding the ?-subunit and the ?-subunit of glucose dehydrogenase of Burkhorderia cepacia in an expressible form, and in which expression of the ccm system (cytochrome c maturation system) is enhanced, to express the aforementioned DNAs and produce a glucose dehydrogenase complex, and collecting the complex.
    Type: Application
    Filed: March 24, 2004
    Publication date: August 31, 2006
    Inventors: Hideaki Yamaoka, Mitsuhiro Hoshijima, Shido Kawase, Keisuke Kurosaka
  • Publication number: 20060035300
    Abstract: The present invention relates to a technique for measuring a glucose level by utilizing a reaction system containing an enzyme and an electron carrier. In accordance with the glucose level measuring method of the present invention, glucose dehydrogenase with cytochrome C attached thereto or glucose dehydrogenase derived from a microorganism belonging to a burkholderia genus is used as the enzyme, and a Ru compound is used as the electron carrier. The present invention further provides a glucose sensor in which glucose dehydrogenase with cytochrome C attached thereto or glucose dehydrogenase derived from derived from a microorganism belonging to a burkholderia genus is used as the enzyme, and a Ru compound is used as the electron carrier.
    Type: Application
    Filed: June 16, 2003
    Publication date: February 16, 2006
    Applicant: ARKRAY, INC
    Inventors: Hideaki Yamaoka, Mitsuhiro Hoshijima, Tomomichi Tsujimoto