Patents by Inventor Masao Shiozaki

Masao Shiozaki 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: 9493497
    Abstract: The invention provides a compound effective as an antitumor active agent or vaccine adjuvant and an intermediate useful for the synthesis of the compound, as well as production methods thereof, and a medicament containing the novel compound. The compound is a carbamate glycolipid represented by the formula (I) wherein each symbol is as defined herein. The invention also provides a dendritic cell pulsed with the glycolipid.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: November 15, 2016
    Assignee: RIKEN
    Inventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Masaru Taniguchi, Hiroshi Watarai
  • Patent number: 9464105
    Abstract: The invention provides a compound represented by the formula (I) wherein R1 is a hydrogen atom or a hydroxyl group; two R2 are the same or different and each is a hydrogen atom or a hydroxyl group; R3 is a hydrocarbon group having 8-14 carbon atoms, which optionally has substituent(s); and R4 is a hydrocarbon group having 18-24 carbon atoms, which optionally has substituent(s), or a salt thereof. The invention also provides a method of treating an autoimmune disease or suppressing immunity by administering the aforementioned compound or a salt thereof to a patient in need thereof.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: October 11, 2016
    Assignee: RIKEN
    Inventors: Masao Shiozaki, Takuya Tashiro, Kenji Mori, Tomokuni Shigeura, Hiroshi Watarai, Masaru Taniguchi
  • Publication number: 20150218199
    Abstract: The invention provides a compound represented by the formula (I) wherein R1 is a hydrogen atom or a hydroxyl group; two R2 are the same or different and each is a hydrogen atom or a hydroxyl group; R3 is a hydrocarbon group having 8-14 carbon atoms, which optionally has substituent(s); and R4 is a hydrocarbon group having 18-24 carbon atoms, which optionally has substituent(s), or a salt thereof. The invention also provides a method of treating an autoimmune disease or suppressing immunity by administering the aforementioned compound or a salt thereof to a patient in need thereof.
    Type: Application
    Filed: August 2, 2013
    Publication date: August 6, 2015
    Inventors: Masao Shiozaki, Takuya Tashiro, Kenji Mori, Tomokuni Shigeura, Hiroshi Watarai, Masaru Taniguchi
  • Publication number: 20150152128
    Abstract: The invention provides a compound effective as an antitumor active agent or vaccine adjuvant and an intermediate useful for the synthesis of the compound, as well as production methods thereof, and a medicament containing the novel compound. The compound is a carbamate glycolipid represented by the formula (I) wherein each symbol is as defined herein. The invention also provides a dendritic cell pulsed with the glycolipid.
    Type: Application
    Filed: April 26, 2013
    Publication date: June 4, 2015
    Inventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Masaru Taniguchi., Hiroshi Watarai
  • Patent number: 8853173
    Abstract: A compound represented by the following formula (1): wherein R1 is an aldopyranose residue wherein the 6-hydroxyl group is optionally alkylated, R2 is a C1-26 hydrocarbon group optionally having substituent(s), R3 is a hydrogen atom or a C1-26 hydrocarbon group optionally having substituent(s), R4 is a C1-21 hydrocarbon group optionally having substituent(s), X is an oxygen atom or —CH2—, and Y is —CH2—, —CH(OH)— or —CH?CH—, or a salt thereof is useful for the prophylaxis or treatment of cancer or infection, since it can preferentially induce production of IFN-? of NKT cells.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: October 7, 2014
    Assignee: RIKEN
    Inventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Masaru Taniguchi, Hiroshi Watarai
  • Patent number: 8580751
    Abstract: The invention provides esterified ?-galactosylceramides effective for cancer treatment and the like, and a medicament containing same. In particular, the invention relates to a compound represented by the formula (I): wherein R1 is a hydrocarbon group having a carbon number of 1 to 30, R2 is a hydrocarbon group having a carbon number of 1 to 20, R3 is a hydrogen atom or hydrocarbon group having a carbon number of 1 to 5, R4 and R5 are the same or different and each is a hydrogen atom or a hydrocarbon group having a carbon number of 1 to 5, or R4 and R5 in combination form a divalent hydrocarbon group having a carbon number of 1 to 5, and optionally form a ring structure together with the adjacent ethylenedioxy, or a salt thereof.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: November 12, 2013
    Assignee: Riken
    Inventors: Masao Shiozaki, Takuya Tashiro, Kenji Mori, Ryusuke Nakagawa, Hiroshi Watarai, Masaru Taniguchi
  • Patent number: 8551959
    Abstract: The invention provides a glycolipid effective for cancer treatment and the like and a synthetic intermediate therefor, as well as a medicament containing the glycolipid and the like.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: October 8, 2013
    Assignee: RIKEN
    Inventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Ryusuke Nakagawa, Masaru Taniguchi, Hiroshi Watarai
  • Publication number: 20130005669
    Abstract: A compound represented by the following formula (1): wherein R1 is an aldopyranose residue wherein the 6-hydroxyl group is optionally alkylated, R2 is a C1-26 hydrocarbon group optionally having substituent(s), R3 is a hydrogen atom or a C1-26 hydrocarbon group optionally having substituent(s), R4 is a C1-21 hydrocarbon group optionally having substituent(s), X is an oxygen atom or —CH2—, and Y is —CH2—, —CH(OH)— or —CH?CH—, or a salt thereof is useful for the prophylaxis or treatment of cancer or infection, since it can preferentially induce production of IFN-? of NKT cells.
    Type: Application
    Filed: February 4, 2011
    Publication date: January 3, 2013
    Applicant: RIKEN
    Inventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Masaru Taniguchi, Hiroshi Watarai
  • Publication number: 20110224158
    Abstract: The invention provides esterified ?-galactosylceramides effective for cancer treatment and the like, and a medicament containing same. In particular, the invention relates to a compound represented by the formula (I): wherein R1 is a hydrocarbon group having a carbon number of 1 to 30, R2 is a hydrocarbon group having a carbon number of 1 to 20, R3 is a hydrogen atom or hydrocarbon group having a carbon number of 1 to 5, R4 and R5 are the same or different and each is a hydrogen atom or a hydrocarbon group having a carbon number of 1 to 5, or R4 and R5 in combination form a divalent hydrocarbon group having a carbon number of 1 to 5, and optionally form a ring structure together with the adjacent ethylenedioxy, or a salt thereof.
    Type: Application
    Filed: September 11, 2009
    Publication date: September 15, 2011
    Applicant: RIKEN
    Inventors: Masao Shiozaki, Takuya Tashiro, Kenji Mori, Ryusuke Nakagawa, Hiroshi Watarai, Masaru Taniguchi
  • Publication number: 20110104188
    Abstract: The invention provides a glycolipid effective for cancer treatment and the like and a synthetic intermediate therefor, as well as a medicament containing the glycolipid and the like.
    Type: Application
    Filed: March 25, 2009
    Publication date: May 5, 2011
    Applicant: RIKEN
    Inventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Ryusuke Nakagawa, Masaru Taniguchi, Hiroshi Watarai
  • Publication number: 20090062214
    Abstract: A compound having excellent macrophage activity inhibitory action, which is represented by the general following formula: wherein Q represents an oxygen atom, a C1-C3 alkylene group, a —O-Alk- group or a —O-Alk-O— group (in which Alk is a C1-C3 alkylene group), R1 represents a C1-C20 alkanoyl group which may be substituted, a C3-C20 alkenoyl group which may be substituted or a C3-C20 alkynoyl group which may be substituted, R2, R3 and R4, which may be the same or different, represent a hydrogen atom, a C1-C20 alkyl group which may be substituted, a C2-C20 alkenyl group which may be substituted, a C2-C20 alkynyl group which may be substituted, a C1-C20 alkanoyl group which may be substituted, a C3-C20 alkenoyl group which may be substituted or a C3-C20 alkynoyl group which may be substituted, R5 represents a hydrogen atom, a halogen atom, a hydroxyl group, a C1-C6 alkoxy group which may be substituted, a C2-C6 alkenyloxy group which may be substituted or a C2-C6 alkynyloxy group which may be substituted
    Type: Application
    Filed: January 7, 2005
    Publication date: March 5, 2009
    Inventors: Masao Shiozaki, Takaichi Shimozato
  • Patent number: 6511965
    Abstract: A compound of formula (I) below, which exhibits excellent macrophage activity inhibitory action, is useful for the treatment or prophylaxis of inflammatory disorders, autoimmune diseases or septicemia. In a preferred embodiment, R1 and R3 each represents a C1-C20 alkanoyl group which may optionally be substituted with one or more substituent groups selected from substituent group A, R2 and R4 each represents a C1-C20 alkyl group which may optionally be substituted with one or more substituent groups selected from substituent group A, R5 is a hydrogen atom, a halogen atom, a hydroxy group, or a C1-C6 alkoxy group, and substituent group A is a halogen atom, a hydroxy group, an oxo group, a C1-C20 alkoxy group, or a C1-C20 alkanoyloxy group.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: January 28, 2003
    Assignee: Sankyo Company, Limited
    Inventors: Yukiko Kazama, Masao Shiozaki, Shinichi Kurakata, Saori Kanai
  • Publication number: 20020161221
    Abstract: A compound of formula (I) below, which exhibits excellent macrophage activity inhibitory action, is useful for the treatment or prophylaxis of inflammatory disorders, autoimmune diseases or septicemia. In a preferred embodiment, R1 and R3 each represents a C1-C20 alkanoyl group which may optionally be substituted with one or more substituent groups selected from substituent group A, R2 and R4 each represents a C1-C20 alkyl group which may optionally be substituted with one or more substituent groups selected from substituent group A, R5 is a hydrogen atom, a halogen atom, a hydroxy group, or a C1-C6 alkoxy group, and substituent group A is a halogen atom, a hydroxy group, an oxo group, a C1-C20 alkoxy group, or a C1-C20 alkanoyloxy group.
    Type: Application
    Filed: August 9, 2001
    Publication date: October 31, 2002
    Applicant: SANKYO COMPANY, LIMITED
    Inventors: Yukiko Kazama, Masao Shiozaki, Shinichi Kurakata, Saori Kanai
  • Patent number: 5792840
    Abstract: Compounds of formula (I): ##STR1## in which: R.sup.1 is hydroxy, protected hydroxy, fluorine, or --OP(O)(OH).sub.2 ; R.sup.2 and R.sup.3 are independently optionally substituted C.sub.6 -C.sub.20 aliphatic acyl; R.sup.4 is hydroxy, protected hydroxy, or --OP(O)(OH).sub.2, where at least one of R.sup.1 and R.sup.4 is --OP(O)(OH).sub.2 ; and R.sup.5 is hydroxy, protected hydroxy, or fluorine; provided that, except where at least one of R.sup.1 and R.sup.5 is fluorine, then at least one of R.sup.2 and R.sup.3 is a substituted C.sub.6 -C.sub.20 aliphatic acyl having (i) at least one halogen substituent and (ii) at least one substituent selected from the group consisting of halogen, hydroxy and C.sub.6 -C.sub.20 aliphatic acyloxy or at least one of R.sup.2 and R.sup.3 is a substituted C.sub.6 -C.sub.20 aliphatic acyl which is substituted by at least one halogen-substituted C.sub.6 -C.sub.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: August 11, 1998
    Assignee: Sankyo Company, Limited
    Inventors: Masao Shiozaki, Noboru Ishida, Masami Arai, Tetsuo Hiraoka, Tomowo Kobayashi, Yuzuru Akamatsu, Masahiro Nishijima