Patents by Inventor Kazuhiro Ikegai

Kazuhiro Ikegai 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: 9399038
    Abstract: A method for preventing or treating a disease selected from the group consisting of visceral pain, inflammatory pain, osteoarthritis pain, neuropathic pain, and fibromyalgia in a subject in need thereof, comprising administering to said subject an effective amount of the compound of the following formula (I) or a salt thereof: wherein R1, R2, R3, R4, R5, X and n are as described herein.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: July 26, 2016
    Assignee: Astellas Pharma Inc.
    Inventors: Tsukasa Ishihara, Kazuhiro Ikegai, Ikumi Kuriwaki, Hiroyuki Hisamichi, Nobuaki Takeshita, Ryuichi Takezawa
  • Publication number: 20150133433
    Abstract: A method for preventing or treating a disease selected from the group consisting of visceral pain, inflammatory pain, osteoarthritis pain, neuropathic pain, and fibromyalgia in a subject in need thereof, comprising administering to said subject an effective amount of the compound of the following formula (I) or a salt thereof: wherein R1, R2, R3, R4, R5, X and n are as described herein.
    Type: Application
    Filed: January 23, 2015
    Publication date: May 14, 2015
    Applicant: ASTELLAS PHARMA INC.
    Inventors: Tsukasa ISHIHARA, Kazuhiro IKEGAI, Ikumi KURIWAKI, Hiroyuki HISAMICHI, Nobuaki TAKESHITA, Ryuichi TAKEZAWA
  • Patent number: 8981119
    Abstract: The present invention is directed to compounds of Formula I: wherein R1, R2, R3, R4, R5, X and n are described herein. These compounds and their pharmaceutically acceptable salts thereof are useful as IK1 channel activators.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: March 17, 2015
    Assignee: Astellas Pharma Inc.
    Inventors: Tsukasa Ishihara, Kazuhiro Ikegai, Ikumi Kuriwaki, Hiroyuki Hisamichi, Nobuaki Takeshita, Ryuichi Takezawa
  • Publication number: 20140364421
    Abstract: [Problem] A compound which is useful as an IK1 channel activator is provided. [Means for Solution] As a result of studies on the IK1 channel activator, the present inventors have found that a benzothiophene compound shows effectiveness on visceral pain, inflammatory pain, osteoarthritis pain, neuropathic pain, or fibromyalgia, thereby completing the invention. A compound of the invention has an IK1 channel activation effect, and can also be used as an agent for preventing and/or treating visceral pain, inflammatory pain, osteoarthritis pain, neuropathic pain, or fibromyalgia. In addition, the IK1 channel activator can be used as an agent for preventing and/or treating inflammatory pain, osteoarthritis pain, neuropathic pain, and fibromyalgia.
    Type: Application
    Filed: June 6, 2014
    Publication date: December 11, 2014
    Applicant: ASTELLAS PHARMA INC.
    Inventors: Tsukasa ISHIHARA, Kazuhiro IKEGAI, Ikumi KURIWAKI, Hiroyuki HISAMICHI, Nobuaki TAKESHITA, Ryuichi TAKEZAWA
  • Patent number: 8598355
    Abstract: [Problems] A compound, which is useful as an active ingredient of a pharmaceutical composition, for example, a pharmaceutical composition for treating chronic renal failure and/or diabetic nephropathy, is provided. [Solving Means] The present inventors have conducted extensive studies on a compound having an EP4 receptor antagonistic activity, and confirmed that the amide compound of the present invention has an EP4 receptor antagonistic activity, thereby completing the present invention. The amide compound of the present invention has an EP4 receptor antagonistic activity, and can be used as an active ingredient of a pharmaceutical composition for preventing and/or treating various EP4-related diseases, for example, chronic renal failure and/or diabetic nephropathy, and the like.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: December 3, 2013
    Assignee: Astellas Pharma Inc.
    Inventors: Eisuke Nozawa, Ryotaro Ibuka, Kazuhiro Ikegai, Keisuke Matsuura, Tatsuya Zenkoh, Ryushi Seo, Susumu Watanuki, Michihito Kageyama
  • Patent number: 8153658
    Abstract: To provide a compound which can be used for treating diseases in which a calcium sensing receptor (CaSR) participates, particularly hyperparathyroidism. It was found that a novel piperidine derivative which is characterized in that one of a 3-position and a 4-position is substituted with an aminomethyl group substituted with an arylalkyl group or the like and the other position is substituted with aryl, heteroaryl or the like, or a salt thereof, has an excellent CaSR agonistic regulatory action, and also has excellent selectivity with a CYP2D6 inhibitory action having a possibility of causing drug interaction. Based on the above, this novel piperidine derivative is useful as a therapeutic agent for diseases in which CaSR participates (hyperparathyroidism, renal osteodystrophy, hypercalcemia, and the like).
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: April 10, 2012
    Assignee: Astellas Pharma, Inc.
    Inventors: Shunichiro Hachiya, Kazuhiro Ikegai, Ryotaro Ibuka, Taisuke Takahashi, Makoto Oku, Ryushi Seo, Yoh Terada, Masanao Sanagi
  • Patent number: 7977466
    Abstract: The present invention provides C-glycoside derivatives and salts thereof, wherein B ring is bonded to A ring via —X— and A ring is directly bonded to the glucose residue, and it is usable as a Na+-glucose cotransporter inhibitor, especially for a therapeutic and/or preventive agent for diabetes such as insulin-dependent diabetes (type 1 diabetes) and insulin-independent diabetes (type 2 diabetes), as well as diabetes related diseases such as an insulin-resistant diseases and obesity.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: July 12, 2011
    Assignees: Astellas Pharma Inc., Kotobuki Pharmaceutical Co., Ltd.
    Inventors: Masakazu Imamura, Takeshi Murakami, Ryota Shiraki, Kazuhiro Ikegai, Takashi Sugane, Fumiyoshi Iwasaki, Eiji Kurosaki, Hiroshi Tomiyama, Atsushi Noda, Kayoko Kitta, Yoshinori Kobayashi
  • Publication number: 20110144153
    Abstract: [Problems] A compound, which is useful as an active ingredient of a pharmaceutical composition, for example, a pharmaceutical composition for treating chronic renal failure and/or diabetic nephropathy, is provided. [Solving Means] The present inventors have conducted extensive studies on a compound having an EP4 receptor antagonistic activity, and confirmed that the amide compound of the present invention has an EP4 receptor antagonistic activity, thereby completing the present invention. The amide compound of the present invention has an EP4 receptor antagonistic activity, and can be used as an active ingredient of a pharmaceutical composition for preventing and/or treating various EP4-related diseases, for example, chronic renal failure and/or diabetic nephropathy, and the like.
    Type: Application
    Filed: May 12, 2009
    Publication date: June 16, 2011
    Applicant: Astellas Pharma Inc.
    Inventors: Eisuke Nozawa, Ryotaro Ibuka, Kazuhiro Ikegai, Keisuke Matsuura, Tatsuya Zenkoh, Ryushi Seo, Susumu Watanuki, Michihito Kageyama
  • Publication number: 20110028463
    Abstract: [Problems] To provide a compound that is useful as an agent for treating chronic renal insufficiency or an agent for treating diabetic nephropathy. [Means for Solving Problems] The present inventors have conducted extensive studies on a compound having an EP4 receptor antagonistic action, and as a result, they have found that various amide derivatives having a carboxylic group or an equivalent thereof exhibit an excellent EP4 receptor antagonistic action, thereby completing the present invention. Since the compound of the present invention has an excellent EP4 receptor antagonistic action, it is useful as an agent for preventing and/or treating chronic renal insufficiency or diabetic nephropathy.
    Type: Application
    Filed: July 2, 2008
    Publication date: February 3, 2011
    Applicant: Astellas Pharma Inc.
    Inventors: Eisuke Nozawa, Ryotaro Ibuka, Kazuhiro Ikegai, Keisuke Matsuura, Tatsuya Zenkoh, Ryushi Seo
  • Patent number: 7855198
    Abstract: There is provided a compound having a capsaicin receptor VR1 inhibitory activity and useful as a therapeutic agent for various pains including inflammatory pain and neurogenic pain, migraine, cluster headache, bladder diseases including overactive bladder, and the like. A benzamide derivative or a salt thereof wherein a benzene ring is attached to a D ring (a monocyclic or bicyclic hydrocarbon ring or a monocyclic or bicyclic heteroaromatic ring) through an amide bond, the benzene ring is directly bonded to an E ring (a monocyclic or bicyclic hydrocarbon ring or a monocyclic or bicyclic heteroaromatic ring), and the benzene ring is further bonded to A (an amino moiety, a monocyclic or bicyclic heterocycle) through L (a lower alkylene).
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: December 21, 2010
    Assignee: Astellas Pharma Inc.
    Inventors: Takahiro Kuramochi, Norio Asai, Kazuhiro Ikegai, Seijiro Akamatsu, Hironori Harada, Noriko Ishikawa, Shohei Shirakami, Satoshi Miyamoto, Toshihiro Watanabe, Tetsuo Kiso
  • Patent number: 7772407
    Abstract: The present invention provides C-glycoside derivatives and salts thereof, wherein B ring is bonded to A ring via —X— and A ring is directly bonded to the glucose residue, and it is usable as a Na+-glucose cotransporter inhibitor, especially for a therapeutic and/or preventive agent for diabetes such as insulin-dependent diabetes (type 1 diabetes) and insulin-independent diabetes (type 2 diabetes), as well as diabetes related diseases such as an insulin-resistant diseases and obesity.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: August 10, 2010
    Assignees: Astellas Pharma Inc., Kotobuki Pharmaceuticals Co., Ltd.
    Inventors: Masakazu Imamura, Takeshi Murakami, Ryota Shiraki, Kazuhiro Ikegai, Takashi Sugane, Fumiyoshi Iwasaki, Eiji Kurosaki, Hiroshi Tomiyama, Atsushi Noda, Kayoko Kitta, Yoshinori Kobayashi
  • Publication number: 20100029687
    Abstract: [Problem] To provide a compound which can be used for treating diseases in which a calcium sensing receptor (CaSR) participates, particularly hyperparathyroidism. [Means for Resolution] It was found that a novel piperidine derivative which is characterized in that one of a 3-position and a 4-position is substituted with an aminomethyl group substituted with an arylalkyl group or the like and the other position is substituted with aryl, heteroaryl or the like, or a salt thereof, has an excellent CaSR agonistic regulatory action, and also has excellent selectivity with a CYP2D6 inhibitory action having a possibility of causing drug interaction. Based on the above, this novel piperidine derivative is useful as a therapeutic agent for diseases in which CaSR participates (hyperparathyroidism, renal osteodystrophy, hypercalcemia, and the like).
    Type: Application
    Filed: November 14, 2007
    Publication date: February 4, 2010
    Applicant: ASTELLAS PHARMA INC.
    Inventors: Shunichiro Hachiya, Kazuhiro Ikegai, Ryotaro Ibuka, Taisuke Takahashi, Makoto Oku, Ryushi Seo, Yoh Terada, Masanao Sanagi
  • Publication number: 20090270365
    Abstract: There is provided a compound having a capsaicin receptor VR1 inhibitory activity and useful as a therapeutic agent for various pains including inflammatory pain and neurogenic pain, migraine, cluster headache, bladder diseases including overactive bladder, and the like. A benzamide derivative or a salt thereof wherein a benzene ring is attached to a D ring (a monocyclic or bicyclic hydrocarbon ring or a monocyclic or bicyclic heteroaromatic ring) through an amide bond, the benzene ring is directly bonded to an E ring (a monocyclic or bicyclic hydrocarbon ring or a monocyclic or bicyclic heteroaromatic ring), and the benzene ring is further bonded to A (an amino moiety, a monocyclic or bicyclic heterocycle) through L (a lower alkylene).
    Type: Application
    Filed: July 2, 2009
    Publication date: October 29, 2009
    Applicant: Astellas Pharma Inc.
    Inventors: Takahiro KURAMOCHI, Norio ASAI, Kazuhiro IKEGAI, Seijiro AKAMATSU, Hironori HARADA, Noriko ISHIKAWA, Shohei SHIRAKAMI, Satoshi MIYAMOTO, Toshihiro WATANABE, Tetsuo KISO
  • Patent number: 7585878
    Abstract: There is provided a compound having a capsaicin receptor VR1 inhibitory activity and useful as a therapeutic agent for various pains including inflammatory pain and neurogenic pain, migraine, cluster headache, bladder diseases including overactive bladder, and the like. A benzamide derivative or a salt thereof wherein a benzene ring is attached to a D ring (a monocyclic or bicyclic hydrocarbon ring or a monocyclic or bicyclic heteroaromatic ring) through an amide bond, the benzene ring is directly bonded to an E ring (a monocyclic or bicyclic hydrocarbon ring or a monocyclic or bicyclic heteroaromatic ring), and the benzene ring is further bonded to A (an amino moiety, a monocyclic or bicyclic heterocycle) through L (a lower alkylene).
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: September 8, 2009
    Assignee: Astellas Pharma Inc.
    Inventors: Takahiro Kuramochi, Norio Asai, Kazuhiro Ikegai, Seijiro Akamatsu, Hironori Harada, Noriko Ishikawa, Shohei Shirakami, Satoshi Miyamoto, Toshihiro Watanabe, Tetsuo Kiso
  • Publication number: 20090069252
    Abstract: The present invention provides C-glycoside derivatives and salts thereof, wherein B ring is bonded to A ring via —X— and A ring is directly bonded to the glucose residue, and it is usable as a Na+-glucose cotransporter inhibitor, especially for a therapeutic and/or preventive agent for diabetes such as insulin-dependent diabetes (type 1 diabetes) and insulin-independent diabetes (type 2 diabetes), as well as diabetes related diseases such as an insulin-resistant diseases and obesity.
    Type: Application
    Filed: July 15, 2008
    Publication date: March 12, 2009
    Applicants: Astellas Pharma Inc., Kotobuki Pharmaceutical Co., Ltd.
    Inventors: Masakazu Imamura, Takeshi Murakami, Ryota Shiraki, Kazuhiro Ikegai, Takashi Sugane, Fumiyoshi Iwasaki, Eiji Kurosaki, Hiroshi Tomiyama, Atsushi Noda, Kayoko Kitta, Yoshinori Kobayashi
  • Publication number: 20070167444
    Abstract: There is provided a compound having a capsaicin receptor VR1 inhibitory activity and useful as a therapeutic agent for various pains including inflammatory pain and neurogenic pain, migraine, cluster headache, bladder diseases including overactive bladder, and the like. A benzamide derivative or a salt thereof wherein a benzene ring is attached to a D ring (a monocyclic or bicyclic hydrocarbon ring or a monocyclic or bicyclic heteroaromatic ring) through an amide bond, the benzene ring is directly bonded to an E ring (a monocyclic or bicyclic hydrocarbon ring or a monocyclic or bicyclic heteroaromatic ring), and the benzene ring is further bonded to A (an amino moiety, a monocyclic or bicyclic heterocycle) through L (a lower alkylene).
    Type: Application
    Filed: June 10, 2004
    Publication date: July 19, 2007
    Inventors: Takahiro Kuramochi, Norio Asai, Kazuhiro Ikegai, Seijiro Akamatsu, Hironori Harada, Noriko Ishikawa, Shohei Shirakami, Satoshi Miyamoto, Toshihiro Watanabe, Tetsuo Kiso
  • Publication number: 20070161787
    Abstract: The present invention provides C-glycoside derivatives and salts thereof, wherein B ring is bonded to A ring via —X— and A ring is directly bonded to the glucose residue, and it is usable as a Na+-glucose cotransporter inhibitor, especially for a therapeutic and/or preventive agent for diabetes such as insulin-dependent diabetes (type 1 diabetes) and insulin-independent diabetes (type 2 diabetes), as well as diabetes related diseases such as an insulin-resistant diseases and obesity.
    Type: Application
    Filed: February 26, 2007
    Publication date: July 12, 2007
    Applicants: Astellas Pharma Inc., Kotobuki Pharmaceutical Co., Ltd.
    Inventors: Masakazu Imamura, Takeshi Murakami, Ryota Shiraki, Kazuhiro Ikegai, Takashi Sugane, Fumiyoshi Iwasaki, Eiji Kurosaki, Hiroshi Tomiyama, Atsushi Noda, Kayoko Kitta, Yoshinori Kobayashi
  • Patent number: 7202350
    Abstract: The present invention provides C-glycoside derivatives and salts thereof, wherein B ring is bonded to A ring via —X— and A ring is directly bonded to the glucose residue, and it is usable as a Na+-glucose cotransporter inhibitor, especially for a therapeutic and/or preventive agent for diabetes such as insulin-dependent diabetes (type 1 diabetes) and insulin-independent diabetes (type 2 diabetes), as well as diabetes related diseases such as an insulin-resistant diseases and obesity.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: April 10, 2007
    Assignees: Astellas Pharma Inc., Kotobuki Pharmaceutical Co., Ltd
    Inventors: Masakazu Imamura, Takeshi Murakami, Ryota Shiraki, Kazuhiro Ikegai, Takashi Sugane, Fumiyoshi Iwasaki, Eiji Kurosaki, Hiroshi Tomiyama, Atsushi Noda, Kayoko Kitta, Yoshinori Kobayashi
  • Patent number: 7169761
    Abstract: The present invention provides an azulene derivative and a salt thereof, wherein an azulene ring is bonded to a benzene ring directly or via a lower alkylene which may be substituted with a halogen atom and the benzene ring is directly bonded to the glucose residue, and it is usable as a Na+-glucose cotransporter inhibitor, especially for a therapeutic and/or preventive agent for diabetes such as insulin-dependent diabetes (type 1 diabetes) and insulin-independent diabetes (type 2 diabetes), as well as diabetes-related diseases such as insulin-resistant diseases and obesity.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: January 30, 2007
    Assignees: Astellas Pharma Inc., Kotobuki Pharmaceutical Co., Ltd.
    Inventors: Hiroshi Tomiyama, Atsushi Noda, Kayoko Kitta, Yoshinori Kobayashi, Masakazu Imamura, Takeshi Murakami, Kazuhiro Ikegai, Takayuki Suzuki, Eiji Kurosaki
  • Publication number: 20060122126
    Abstract: The present invention provides C-glycoside derivatives and salts thereof, wherein B ring is bonded to A ring via —X— and A ring is directly bonded to the glucose residue, and it is usable as a Na+-glucose cotransporter inhibitor, especially for a therapeutic and/or preventive agent for diabetes such as insulin-dependent diabetes (type 1 diabetes) and insulin-independent diabetes (type 2 diabetes), as well as diabetes related diseases such as an insulin-resistant diseases and obesity.
    Type: Application
    Filed: March 12, 2004
    Publication date: June 8, 2006
    Inventors: Masakazu Imamura, Takeshi Murakami, Ryota Shiraki, Kazuhiro Ikegai, Takashi Sugane, Fumiyoshi Iwasaki, Eiji Kurosaki, Hiroshi Tomiyama, Atsushi Noda, Kayoko Kitta, Yoshinori Kobayashi