Patents by Inventor Toshihiro Yonekawa

Toshihiro Yonekawa 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).

  • Publication number: 20200032241
    Abstract: A method for extracting nucleic acid from a biological sample is disclosed. The method comprises steps of: (i) mixing a biological sample, an anionic surfactant and a chaotropic compound to obtain a lysate; (ii) mixing the lysate, an alkanol having a boiling point higher than 75° C., a chaotropic compound and silica particles to adsorb the nucleic acid on the silica particles; (iii) washing the silica particles having the nucleic acid adsorbed thereon with a washing liquid; and (iv) eluting the nucleic acid adsorbed on the silica particles with an eluent, wherein at least steps (i) and (ii) are performed at a temperature higher than 75° C.
    Type: Application
    Filed: September 19, 2017
    Publication date: January 30, 2020
    Inventors: Masaki SATO, Toshihiro YONEKAWA
  • Publication number: 20190302137
    Abstract: The present invention aims to provide a compact, fully automatic genetic testing device with which a step of extracting and purifying a nucleic acid from a sample, a step of injecting a solution containing the nucleic acid, and a step of amplifying and detecting the nucleic acid, can be fully automatically carried out, and which enables a physician to carry out genetic testing at a position close to a patient. The fully automatic genetic testing device comprises: a first unit for extracting and purifying a nucleic acid from a sample; a second unit for injecting a solution containing the nucleic acid to a multi-well chip having a reaction site for amplification of the nucleic acid; and a third unit for optically detecting the nucleic acid amplified in the reaction site(s).
    Type: Application
    Filed: March 29, 2018
    Publication date: October 3, 2019
    Inventors: Yuji SEGAWA, Hidetoshi WATANABE, Toshihiro YONEKAWA, Fumihiko KAZUMI, Rod PETERSON, Anatoly MOSKALEV, Goran FORSHAGER, James FOSTER
  • Publication number: 20140308663
    Abstract: The object of the present invention is to provide a method that allows stable amplification of an internal standard material while maintaining an accurate assay value for a target nucleic acid in a nucleic acid detection system involving the use of an internal standard material and a reagent kit used therefor. The present invention relates to a method for nucleic acid amplification comprising preventing an internal standard amplification product from affecting amplification reaction of a target nucleic acid by performing amplification of an internal standard material prior to amplification of the target nucleic acid in the method for amplifying a target nucleic acid in a sample using an internal standard material and a reagent and reagent kit used therefor.
    Type: Application
    Filed: June 27, 2013
    Publication date: October 16, 2014
    Inventors: Toshihiro YONEKAWA, Tsugunori NOTOMI, Hidetoshi KANDA, Norimitsu HOSAKA
  • Patent number: 8557523
    Abstract: The object of the present invention is to provide a method that allows stable amplification of an internal standard material while maintaining an accurate assay value for a target nucleic acid in a nucleic acid detection system involving the use of an internal standard material and a reagent kit used therefor. The present invention relates to a method for nucleic acid amplification comprising preventing an internal standard amplification product from affecting amplification reaction of a target nucleic acid by performing amplification of an internal standard material prior to amplification of the target nucleic acid in the method for amplifying a target nucleic acid in a sample using an internal standard material and a reagent and reagent kit used therefor.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: October 15, 2013
    Assignee: Eiken Kagaku Kabushiki Kaisha
    Inventors: Toshihiro Yonekawa, Tsugunori Notomi, Hidetoshi Kanda, Norimitsu Hosaka
  • Patent number: 8389221
    Abstract: The present invention provides oligonucleotide primers specifically hybridizing to an arbitrary nucleotide sequence designed from the nucleotide sequence of hemagglutinin of an H5 or H7 avian influenza virus, a nucleic acid amplification method using the primers, a method for diagnosis of infection with an H5 or H7 avian influenza virus by detection of nucleic acid amplification, and a kit for influenza diagnosis.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: March 5, 2013
    Assignees: Japan as represented by Director-General of National Institute of Infectious Diseases, Eiken Kagaku Kabushiki Kaisha
    Inventors: Harumi Minekawa, Toshihiro Yonekawa, Takato Odagiri
  • Publication number: 20120100527
    Abstract: The present invention provides oligonucleotide primers specifically hybridizing to an arbitrary nucleotide sequence designed from the nucleotide sequence of hemagglutinin of an H5 or H7 avian influenza virus, a nucleic acid amplification method using the primers, a method for diagnosis of infection with an H5 or H7 avian influenza virus by detection of nucleic acid amplification, and a kit for influenza diagnosis.
    Type: Application
    Filed: September 14, 2011
    Publication date: April 26, 2012
    Applicants: JAPAN AS REP. BY NAT'L INST. OF INFECT. DISEASES, EIKEN KAGAKU KABUSHIKI KAISHA
    Inventors: Harumi Minekawa, Tsugunori Notomi, Toshihiro Yonekawa, Norihiro Tomita, Yoko Kuzuhara, Takato Odagiri
  • Patent number: 8043813
    Abstract: The present invention provides oligonucleotide primers specifically hybridizing to an arbitrary nucleotide sequence designed from the nucleotide sequence of hemagglutinin of an H5 or H7 avian influenza virus, a nucleic acid amplification method using the primers, a method for diagnosis of infection with an H5 or H7 avian influenza virus by detection of nucleic acid amplification, and a kit for influenza diagnosis.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: October 25, 2011
    Assignees: Japan as represented by Director-General of National Institute of Infectious Diseases, Eiken Kagaku Kabushiki Kaisha
    Inventors: Harumi Minekawa, Tsugunori Notomi, Toshihiro Yonekawa, Norihiro Tomita, Yoko Kuzuhara, Takato Odagiri
  • Publication number: 20100233715
    Abstract: The object of the present invention is to provide a method that allows stable amplification of an internal standard material while maintaining an accurate assay value for a target nucleic acid in a nucleic acid detection system involving the use of an internal standard material and a reagent kit used therefor. The present invention relates to a method for nucleic acid amplification comprising preventing an internal standard amplification product from affecting amplification reaction of a target nucleic acid by performing amplification of an internal standard material prior to amplification of the target nucleic acid in the method for amplifying a target nucleic acid in a sample using an internal standard material and a reagent and reagent kit used therefor.
    Type: Application
    Filed: October 17, 2008
    Publication date: September 16, 2010
    Applicant: Eiken Kagaku Kabushiki Kaisha
    Inventors: Toshihiro Yonekawa, Tsugunori Notomi, Hidetoshi Kanda, Norimitsu Hosaka
  • Patent number: 7638280
    Abstract: The method of the present invention is based on a method wherein a nucleic acid is synthesized utilizing the hybridized 3?-end, which is synthesized by complementary strand synthesis, on a specific region of a target nucleotide sequence existing as the nucleotide sequence of the same strand as the origin for the next round of complementary strand synthesis. The hybridization to a specific region, which region is searched for mutations and polymorphisms, is repeatedly carried out according to the present invention. Thus, mutations and polymorphisms in a target nucleotide sequence are exactly copied to the reaction products.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: December 29, 2009
    Assignee: Eiken Kagaku Kabushiki Kaisha
    Inventors: Hidetoshi Kanda, Tsugunori Notomi, Kentaro Nagamine, Toshihiro Yonekawa
  • Publication number: 20090317795
    Abstract: The present invention provides oligonucleotide primers specifically hybridizing to an arbitrary nucleotide sequence designed from the nucleotide sequence of hemagglutinin of an H5 or H7 avian influenza virus, a nucleic acid amplification method using the primers, a method for diagnosis of infection with an H5 or H7 avian influenza virus by detection of nucleic acid amplification, and a kit for influenza diagnosis.
    Type: Application
    Filed: October 26, 2005
    Publication date: December 24, 2009
    Inventors: Harumi Minekawa, Tsugunori Notomi, Toshihiro Yonekawa, Norihiro Tomita, Yoko Kuzuhara, Takato Odagiri
  • Publication number: 20070238113
    Abstract: The method of the present invention is based on a method wherein a nucleic acid is synthesized utilizing the hybridized 3?-end, which is synthesized by complementary strand synthesis, on a specific region of a target nucleotide sequence existing as the nucleotide sequence of the same strand as the origin for the next round of complementary strand synthesis. The hybridization to a specific region, which region is searched for mutations and polymorphisms, is repeatedly carried out according to the present invention. Thus, mutations and polymorphisms in a target nucleotide sequence are exactly copied to the reaction products.
    Type: Application
    Filed: December 22, 2006
    Publication date: October 11, 2007
    Applicant: EIKEN KAGAKU KABUSHIKI KAISHA
    Inventors: Hidetoshi Kanda, Tsugunori Notomi, Kentaro Nagamine, Toshihiro Yonekawa
  • Patent number: 7175985
    Abstract: The method of the present invention is based on a method wherein a nucleic acid is synthesized utilizing the hybridized 3?-end, which is synthesized by complementary strand synthesis, on a specific region of a target nucleotide sequence existing as the nucleotide sequence of the same strand as the origin for the next round of complementary strand synthesis. The hybridization to a specific region, which region is searched for mutations and polymorphisms, is repeatedly carried out according to the present invention. Thus, mutations and polymorphisms in a target nucleotide sequence are exactly copied to the reaction products.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: February 13, 2007
    Assignee: Eiken Kagaku Kabushiki Kaisha
    Inventors: Hidetoshi Kanda, Tsugunori Notomi, Kentaro Nagamine, Toshihiro Yonekawa
  • Patent number: 5922544
    Abstract: A method and a reagent for detecting cells of a living organism contained in various samples of the organism by detecting genes specific for each animal species. This method is useful for detecting bleeding into feces. It is possible for confirming the bleeding of the human body to use an Alu sequence as the sequence specific for the animal species. As genes are used as the indicator in this method, fecal occult blood can be detected more specifically at a higher sensitivity than by the conventional technique using hemoglobin as the indicator.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: July 13, 1999
    Assignee: Eiken Kagaku Kabushiki Kaish
    Inventors: Kiyoshi Miyai, Tsutomu Naitoh, Toshihiro Yonekawa