Patents by Inventor Takahito Nakahara

Takahito Nakahara 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: 8003105
    Abstract: The present invention relates to a method of treating cancer by co-administration of an effective amount of 1-(2-methoxyethyl)-2-methyl-4,9-dioxo-3-(pyrazin-2-ylmethyl)-4,9-dihydro-1H-naphtho[2,3-d]imidazol-3-ium bromide and an effective amount of one or more anticancer agents selected from the group consisting of carboplatin, cisplatin, paclitaxel, vinorelbine, gemcitabine, irinotecan, docetaxel, doxorubicin, dacarbazine and rituximab, or a retuximab-containing combination therapy selected from R-ICE and R-DHAP. The treatment method of the present invention is useful for the treatment for all solid tumors and lymphomas, preferably skin cancer, bladder cancer, breast cancer, uterine cancer, ovary cancer, prostate cancer, lung cancer, colon cancer, pancreas cancer, renal cancer, gastric cancer and the like. Particularly, they are expected as therapeutic agents for tumor types which show resistance against existing anticancer agents.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: August 23, 2011
    Assignee: Astellas Pharma Inc.
    Inventors: Takahito Nakahara, Kentaro Yamanaka, Aya Kita, Hiroshi Koutoku
  • Patent number: 7618992
    Abstract: The present invention relates to a method of treating cancer by co-administration of an effective amount of 1-(2-methoxyethyl)-2-methyl-4,9-dioxo-3-(pyrazin-2-ylmethyl)-4,9-dihydro-1H-naphtho[2,3-d]imidazol-3-ium bromide and an effective amount of one or more anticancer agents selected from the group consisting of carboplatin, cisplatin, paclitaxel, vinorelbine, gemcitabine, irinotecan, docetaxel, doxorubicin, dacarbazine and rituximab, or a retuximab-containing combination therapy selected from R-ICE and R-DHAP. The treatment method of the present invention is useful for the treatment for all solid tumors and lymphomas, preferably skin cancer, bladder cancer, breast cancer, uterine cancer, ovary cancer, prostate cancer, lung cancer, colon cancer, pancreas cancer, renal cancer, gastric cancer and the like. Particularly, they are expected as therapeutic agents for tumor types which show resistance against existing anticancer agents.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: November 17, 2009
    Assignee: Astellas Pharma Inc.
    Inventors: Takahito Nakahara, Kentaro Yamanaka, Aya Kita, Hiroshi Koutoku
  • Publication number: 20090263390
    Abstract: The present invention relates to a method of treating cancer by co-administration of an effective amount of 1-(2-methoxyethyl)-2-methyl-4,9-dioxo-3-(pyrazin -2-ylmethyl)-4,9-dihydro-1H-naphtho[2,3-d]imidazol-3-ium bromide and an effective amount of one or more anticancer agents selected from the group consisting of carboplatin, cisplatin, paclitaxel, vinorelbine, gemcitabine, irinotecan, docetaxel, doxorubicin, dacarbazine and rituximab, or a retuximab-containing combination therapy selected from R-ICE and R-DHAP. The treatment method of the present invention is useful for the treatment for all solid tumors and lymphomas, preferably skin cancer, bladder cancer, breast cancer, uterine cancer, ovary cancer, prostate cancer, lung cancer, colon cancer, pancreas cancer, renal cancer, gastric cancer and the like. Particularly, they are expected as therapeutic agents for tumor types which show resistance against existing anticancer agents.
    Type: Application
    Filed: June 29, 2009
    Publication date: October 22, 2009
    Applicant: ASTELLAS PHARMA INC.
    Inventors: Takahito Nakahara, Kentaro Yamanaka, Aya Kita, Hiroshi Koutoku
  • Publication number: 20080166344
    Abstract: The present invention relates to a method of treating cancer by co-administration of an effective amount of 1-(2-methoxyethyl)-2-methyl-4,9-dioxo-3-(pyrazin-2-ylmethyl)-4,9-dihydro-1H-naphtho[2,3-d]imidazol-3-ium bromide and an effective amount of one or more anticancer agents selected from the group consisting of carboplatin, cisplatin, paclitaxel, vinorelbine, gemcitabine, irinotecan, docetaxel, doxorubicin, dacarbazine and rituximab, or a retuximab-containing combination therapy selected from R-ICE and R-DHAP. The treatment method of the present invention is useful for the treatment for all solid tumors and lymphomas, preferably skin cancer, bladder cancer, breast cancer, uterine cancer, ovary cancer, prostate cancer, lung cancer, colon cancer, pancreas cancer, renal cancer, gastric cancer and the like. Particularly, they are expected as therapeutic agents for tumor types which show resistance against existing anticancer agents.
    Type: Application
    Filed: December 27, 2007
    Publication date: July 10, 2008
    Applicant: ASTELLAS PHARMA INC.
    Inventors: Takahito NAKAHARA, Kentaro Yamanaka, Aya Kita, Hiroshi Koutoku
  • Patent number: 6734203
    Abstract: This invention relates to medicaments, particularly novel fused imidazolium derivatives useful for the treatment of cancers and novel synthetic intermediate compounds thereof. The novel imidazolium derivatives fused with an aryl or heteroaryl ring, characterized in that the 1- and/or 3-position is substituted by an alkyl group etc. having a substituent selected from the group consisting of —ORa, —SRa and the like, have excellent anti-tumor activity and low toxicity and are useful as anticancer agents having wide margins of safety.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: May 11, 2004
    Inventors: Akira Matsuhisa, Isao Kinoyama, Akira Toyoshima, Takahito Nakahara, Masahiro Takeuchi, Minoru Okada
  • Publication number: 20030114508
    Abstract: This invention relates to medicaments, particularly novel fused imidazolium derivatives useful for the treatment of cancers and novel synthetic intermediate compounds thereof.
    Type: Application
    Filed: July 1, 2002
    Publication date: June 19, 2003
    Inventors: Akira Matsuhisa, Isao Kinoyama, Akira Toyoshima, Takahito Nakahara, Masahiro Takeuchi, Minoru Okada
  • Patent number: RE45105
    Abstract: The present invention relates to a method of treating cancer by co-administration of an effective amount of 1-(2-methoxy-ethyl)-2-methyl-4,9-dioxo-3-(pyrazin-2-ylmethyl)-4,9-dihydro-1H-naphtho[2,3-d]imidazol-3-ium bromide and an effective amount of one or more anticancer agents selected from the group consisting of carboplatin, cisplatin, paclitaxel, vinorelbine, gemcitabine, irinotecan, docetaxel, doxorubicin, dacarbazine and rituximab, or a retuximab-containing combination therapy selected from R-ICE and R-DHAP. The treatment method of the present invention is useful for the treatment for all solid tumors and lymphomas, preferably skin cancer, bladder cancer, breast cancer, uterine cancer, ovary cancer, prostate cancer, lung cancer, colon cancer, pancreas cancer, renal cancer, gastric cancer and the like. Particularly, they are expected as therapeutic agents for tumor types which show resistance against existing anticancer agents.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: September 2, 2014
    Assignee: Astellas Pharma Inc.
    Inventors: Takahito Nakahara, Kentaro Yamanaka, Aya Kita, Hiroshi Koutoku