Patents by Inventor Ayako Sakai

Ayako Sakai 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: 20230134940
    Abstract: A columnar metal component includes a first main surface, and a second main surface on an opposite side to the first main surface. The first main surface includes a first groove. The metal component includes a through-hole penetrating the metal component from the first main surface to the second main surface.
    Type: Application
    Filed: October 31, 2022
    Publication date: May 4, 2023
    Inventors: Ayako Sakai, Yuichi Nakamura, Keita Sato
  • Patent number: 9169330
    Abstract: The present invention relates to a hybridoma producing an anti-methylated DNA antibody, obtained by cell fusion of an antibody-producing cell obtained from an animal immunized with an antigen containing 5?-(5-methyl-2?-deoxycytidine-3?-phospho)-2?-deoxyguanosine 3?-phosphate with a myeloma cell. The present invention also relates to a monoclonal antibody produced by the hybridoma and a method for immunoprecipitation of a methylated DNA using the antibody.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: October 27, 2015
    Assignee: SYSMEX CORPORATION
    Inventors: Ayako Sakai, Masahiro Kajita
  • Patent number: 9075063
    Abstract: The present invention relates to a method for determination of the presence or absence of cancer cells in a biological sample or a method for determination of the prognosis of a colorectal cancer patient based on a result obtained by extracting DNA from a biological sample and analyzing methylation status of a marker gene in the DNA.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: July 7, 2015
    Assignees: THE UNIVERSITY OF TOKYO, SYSMEX CORPORATION
    Inventors: Ayako Sakai, Atsushi Kaneda, Kouichi Yagi, Hiroyuki Aburatani
  • Patent number: 8906623
    Abstract: Success or failure of unmethylated cytosine conversion treatment is determined by using a first primer set comprising plural primers that hybridize with a nucleic acid comprising a nucleotide sequence not containing cytosine in the nucleotide sequence of biological DNA that is subject to an unmethylated cytosine conversion treatment and a second primer set comprising plural primers that hybridize with a nucleic acid comprising a nucleotide sequence in which cytosine in a nucleotide sequence containing cytosine and not containing a CpG site is converted into a base other than cytosine, in the nucleotide sequence of biological DNA.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: December 9, 2014
    Assignee: Sysmex Corporation
    Inventors: Kaya Tai, Ayako Sakai, Noriaki Yamamoto, Noriko Oka, Masahiro Kajita
  • Publication number: 20140356866
    Abstract: The present invention is to provide a computer readable medium comprising a computer program for enabling a computer to carry out provision of information on colon cancer in a subject based on an analysis result on methylation status of a novel marker specific for colon cancer. The above object is achieved by obtaining the analysis result on methylation status of a CpG site located in a promoter region of at least one gene selected from LONRF2 and CUX2 in a DNA sample derived from the subject and providing information on colon cancer in the subject based on the resulting analysis result.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 4, 2014
    Applicants: THE UNIVERSITY OF TOKYO, SYSMEX CORPORATION
    Inventors: Ayako SAKAI, Kaya TAI, Genta NAGAE, Hiroyuki ABURATANI
  • Patent number: 8465919
    Abstract: The method for detecting a methylated cytosine of the present invention comprises the steps of: hybridizing a sample DNA with an oligonucleotide which can hybridize with a region of the sample DNA containing a cytosine suspected of being methylated and has an a basic site at the position complementary to the cytosine; reacting the hybridized sample DNA obtained in the previous step with an oxidizing agent to oxidize the cytosine when it is methylated; and detecting the oxidized methylated cytosine.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: June 18, 2013
    Assignee: Sysmex Corporation
    Inventors: Masahiro Kajita, Noriko Oka, Noriaki Yamamoto, Ayako Sakai, Hideki Ishihara
  • Publication number: 20130130242
    Abstract: The present invention relates to a method for determining presence or absence of a cancer cell in a biological sample based on the analysis result obtained by analyzing methylation status of DNA extracted from the biological sample with a novel molecular marker allowing a determination of presence or absence of the cancer cell.
    Type: Application
    Filed: August 24, 2012
    Publication date: May 23, 2013
    Applicant: SYSMEX CORPORATION
    Inventors: Ayako SAKAI, Yoshihiko TASHIMA, Masahiro KAJITA
  • Patent number: 8446600
    Abstract: A multi function peripheral with a plurality of functions includes a function selecting unit accepting therethrough an input to select a function to be executed from the plurality of functions, a display unit displaying thereon an information screen showing information on the function selected through the function selecting unit, and a display control unit controlling the display unit to, each time a function is selected through the function selecting unit, display thereon a first information screen showing information on the selected function. When a second information screen showing information on a function in execution has been displayed on the display unit, the display control unit controls the display unit to display thereon the first information screen concurrently with the second information screen.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: May 21, 2013
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Noriko Misumi, Ayako Sakai, Takahiro Ikeno, Masaaki Wakizaka
  • Patent number: 8300279
    Abstract: The invention describes an image reading device having a housing, a transparent panel, an image sensor, a carriage, and an electric cable. The housing has a first, second, and third surface. The transparent panel defines a portion of the first surface. The image sensor extends in a first direction, and is mounted to the carriage and optically reads a document through the transparent panel while the carriage reciprocates in a second direction. The electric cable is electrically connected to the image sensor, and includes a band surface portion having a band surface and extending in a third direction intersecting the first and second direction. The electric cable also has a first end portion attached to the carriage; and a second end portion attached to the second surface. At least a portion of the electric cable is twisted such that the band surface and the third surface are not parallel.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: October 30, 2012
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Takaaki Mukai, Yoshinori Osakabe, Ayako Sakai
  • Publication number: 20120219949
    Abstract: In order to simply obtain a methylated DNA sample, a method including bringing a sample which may include methylated DNA into contact with a protein capable of binding to methylated DNA to bind the methylated DNA in the sample to the protein, bringing the sample obtained into contact with at least one deoxyribonuclease to degrade DNA in the sample; and detecting methylated DNA which is not degraded by the deoxyribonuclease by the binding of the sample obtained to the protein is used. In the method, at least one type of deoxyribonucleases is a deoxyribonuclease different from a methylation-sensitive restriction enzyme capable of degradating a single stranded DNA.
    Type: Application
    Filed: February 24, 2012
    Publication date: August 30, 2012
    Applicant: SYSMEX CORPORATION
    Inventors: Ayako SAKAI, Masahiro KAJITA
  • Publication number: 20120190024
    Abstract: The present invention provides a method for determination of presence or absence of an epithelial cancer-derived cell in a biological sample obtained from a subject comprising the steps of: extracting DNA from the biological sample, analyzing methylation status of a CpG site located in at least one region represented by base sequences SEQ ID NOs: 1, 2, 3 and 4 in the DNA obtained from the step of extracting, and determining presence or absence of the epithelial cancer-derived cell in the biological sample based on an analysis result obtained from the step of analyzing.
    Type: Application
    Filed: June 30, 2010
    Publication date: July 26, 2012
    Applicant: SYSMEX CORPORATION
    Inventors: Kaya Tai, Masahiro Kajita, Yoshihiko Tashima, Ayako Sakai
  • Publication number: 20120184719
    Abstract: The present invention relates to a hybridoma producing an anti-methylated DNA antibody, obtained by cell fusion of an antibody-producing cell obtained from an animal immunized with an antigen containing 5?-(5-methyl-2?-deoxycytidine-3?-phospho)-2?-deoxyguanosine 3?-phosphate with a myeloma cell. The present invention also relates to a monoclonal antibody produced by the hybridoma and a method for immunoprecipitation of a methylated DNA using the antibody.
    Type: Application
    Filed: March 26, 2012
    Publication date: July 19, 2012
    Applicant: SYSMEX CORPORATION
    Inventors: Ayako SAKAI, Masahiro KAJITA
  • Publication number: 20120178634
    Abstract: The present invention relates to a method for determination of the presence or absence of cancer cells in a biological sample or a method for determination of the progonsis of a colorectal cancer patient based on a result obtained by extracting DNA from a biological sample and analyzing methylation status of a marker gene in the DNA.
    Type: Application
    Filed: December 30, 2011
    Publication date: July 12, 2012
    Applicants: SYSMEX CORPORATION, THE UNIVERSITY OF TOKYO
    Inventors: Ayako SAKAI, Atsushi KANEDA, Kouichi YAGI, Hiroyuki ABURATANI
  • Patent number: 8163490
    Abstract: The present invention provides a method of analyzing methylated DNA, comprising steps of: (A) treating a DNA-containing sample with a restriction enzyme to obtain a sample containing a DNA fragment; (B) concentrating methylated DNA contained in the sample obtained in step (A) to obtain a methylated DNA concentrate; (C) subjecting the methylated DNA concentrate obtained in step (B) and a primer set to nucleic acid amplification reaction, wherein the primer set performs the nucleic acid amplification reaction in step (C) by using a template DNA which does not have a CpG site; (D) detecting an amplification product obtained in step (C); (E) judging whether the methylated DNA concentrate obtained in step (B) is appropriate as a sample for detection of methylated DNA, on the basis of the detection result of the amplification product in step (D); and (F) analyzing the methylated DNA contained in the methylated DNA concentrate.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: April 24, 2012
    Assignee: Sysmex Corporation
    Inventors: Ayako Sakai, Masahiro Kajita, Hideki Ishihara
  • Publication number: 20110177511
    Abstract: It is determined that the breast cancer has metastasized when methylation is detected in the CpG island of at least one selected from the group consisting of GSTP1, RASSF1A and RARb by detecting methylation in CpG island of each of GSTP1, RASSF1A and RARb contained in serum obtained from a patient who has undergone surgery to remove breast cancer.
    Type: Application
    Filed: September 17, 2009
    Publication date: July 21, 2011
    Inventors: Noriaki Yamamoto, Masahiro Kajita, Ayako Sakai
  • Publication number: 20110027799
    Abstract: Success or failure of unmethylated cytosine conversion treatment is determined by using a first primer set comprising plural primers that hybridize with a nucleic acid comprising a nucleotide sequence not containing cytosine in the nucleotide sequence of biological DNA that is subject to an unmethylated cytosine conversion treatment and a second primer set comprising plural primers that hybridize with a nucleic acid comprising a nucleotide sequence in which cytosine in a nucleotide sequence containing cytosine and not containing a CpG site is converted into a base other than cytosine, in the nucleotide sequence of biological DNA.
    Type: Application
    Filed: March 16, 2009
    Publication date: February 3, 2011
    Applicant: SYSMEX CORPORAITON
    Inventors: Kaya Tai, Ayako Sakai, Noriaki Yamamoto, Noriko Oka, Masahiro Kajita
  • Publication number: 20100331207
    Abstract: The invention provides a method of detecting, with a microarray, a target nucleic acid containing a base sequence to which a nucleic acid-binding protein binds, obtaining a signal from a correction probe not containing any sequence complementary to the base sequence to which the nucleic acid-binding protein binds for being used as a background to correct a signal obtained from a detection probe hybridizing to the target nucleic acid, as well as a computer program product for enabling a computer to detect, with a microarray, a target nucleic acid containing a base sequence to which a nucleic acid-binding protein binds.
    Type: Application
    Filed: June 29, 2010
    Publication date: December 30, 2010
    Applicant: SYSMEX CORPORATION
    Inventors: AYAKO SAKAI, YOSHIHIKO TASHIMA, MASAHIRO KAJITA
  • Publication number: 20100240042
    Abstract: The method for detecting a methylated cytosine of the present invention comprises the steps of: hybridizing a sample DNA with an oligonucleotide which can hybridize with a region of the sample DNA containing a cytosine suspected of being methylated and has an a basic site at the position complementary to the cytosine; reacting the hybridized sample DNA obtained in the previous step with an oxidizing agent to oxidize the cytosine when it is methylated; and detecting the oxidized methylated cytosine.
    Type: Application
    Filed: August 20, 2008
    Publication date: September 23, 2010
    Applicant: SYSMEX CORPORATION
    Inventors: Masahiro Kajita, Noriko Oka, Noriaki Yamamoto, Ayako Sakai, Hideki Ishihara
  • Publication number: 20090246784
    Abstract: The present invention provides a method of analyzing methylated DNA, comprising steps of: (A) treating a DNA-containing sample with a restriction enzyme to obtain a sample containing a DNA fragment; (B) concentrating methylated DNA contained in the sample obtained in step (A) to obtain a methylated DNA concentrate; (C) subjecting the methylated DNA concentrate obtained in step (B) and a primer set to nucleic acid amplification reaction, wherein the primer set performs the nucleic acid amplification reaction in step (C) by using a template DNA which does not have a CpG site; (D) detecting an amplification product obtained in step (C); (E) judging whether the methylated DNA concentrate obtained in step (B) is appropriate as a sample for detection of methylated DNA, on the basis of the detection result of the amplification product in step (D); and(F) analyzing the methylated DNA contained in the methylated DNA concentrate.
    Type: Application
    Filed: March 12, 2009
    Publication date: October 1, 2009
    Applicant: SYSMEX CORPORATION
    Inventors: Ayako SAKAI, Masahiro Kajita, Hideki Ishihara
  • Publication number: 20090244655
    Abstract: The invention describes an image reading device having a housing, a transparent panel, an image sensor, a carriage, and an electric cable. The housing has a first, second, and third surface. The transparent panel defines a portion of the first surface. The image sensor extends in a first direction, and is mounted to the carriage and optically reads a document through the transparent panel while the carriage reciprocates in a second direction. The electric cable is electrically connected to the image sensor, and includes a band surface portion having a band surface and extending in a third direction intersecting the first and second direction. The electric cable also has a first end portion attached to the carriage; and a second end portion attached to the second surface. At least a portion of the electric cable is twisted such that the band surface and the third surface are not parallel.
    Type: Application
    Filed: March 24, 2009
    Publication date: October 1, 2009
    Applicant: Brother Kogyo Kabushiki Kaisha
    Inventors: Takaaki MUKAI, Yoshinori OSAKABE, Ayako SAKAI