Patents by Inventor Keizo Sugasawa

Keizo Sugasawa 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: 10301286
    Abstract: To provide a compound which can be used as an MC4 receptor agonist. The present inventors have investigated MC4 receptor agonists, and have found that a piperazine derivative has an action related to the agonists, thereby completing the present invention. That is, the piperazine derivative of the present invention has an MC4 receptor agonistic action, and can be used as an agent for preventing or treating bladder and/or urinary tract diseases, in particular, underactive bladder, hypotonic bladder, acontractile bladder, detrusor underactivity, neurogenic bladder, urethral relaxation failure, detrusor-external urethral sphincter dyssynergia, and voiding dysfunctions in benign prostatic hyperplasia.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: May 28, 2019
    Assignee: Astellas Pharma Inc.
    Inventors: Takashi Sugane, Takuya Makino, Daisuke Yamashita, Yasuhiro Yonetoku, Daisuke Tanabe, Hisashi Mihara, Norio Asai, Kazuhiko Osoda, Takafumi Shimizu, Hiroyuki Moritomo, Keizo Sugasawa, Kyoichi Maeno, Naomi Hosogai
  • Publication number: 20180230131
    Abstract: [Problem] To provide a compound which can be used as an MC4 receptor agonist. [Means for Solution] The present inventors have investigated MC4 receptor agonists, and have found that a piperazine derivative has an action related to the agonists, thereby completing the present invention. That is, the piperazine derivative of the present invention has an MC4 receptor agonistic action, and can be used as an agent for preventing or treating bladder and/or urinary tract diseases, in particular, underactive bladder, hypotonic bladder, acontractile bladder, detrusor underactivity, neurogenic bladder, urethral relaxation failure, detrusor-external urethral sphincter dyssynergia, and voiding dysfunctions in benign prostatic hyperplasia.
    Type: Application
    Filed: August 2, 2016
    Publication date: August 16, 2018
    Applicant: Astellas Pharma Inc.
    Inventors: Takashi SUGANE, Takuya MAKINO, Daisuke YAMASHITA, Yasuhiro YONETOKU, Daisuke TANABE, Hisashi MIHARA, Norio ASAI, Kazuhiro OSODA, Takafumi SHIMIZU, Hiroyuki MORITOMO, Keizo SUGASAWA, Kyoichi MAENO, Naomi HOSAGAI
  • Patent number: 8765764
    Abstract: A 2-acylaminothiazole derivative or a pharmaceutically acceptable salt thereof having an excellent effect of proliferating human c-mpl-Ba/F3 cells and an activity of increasing platelets based on the effect of promoting the formation of megakaryocytic colonies. A compound or a pharmaceutically acceptable salt thereof useful in treating thrombocytopenia.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: July 1, 2014
    Assignee: Astellas Pharma, Inc.
    Inventors: Keizo Sugasawa, Susumu Watanuki, Yuji Koga, Hiroshi Nagata, Ryutaro Wakayama, Fukushi Hirayama, Ken-Ichi Suzuki
  • Patent number: 8338429
    Abstract: A 2-acylaminothiazole derivative or a pharmaceutically acceptable salt thereof having an excellent effect of proliferating human c-mpl-Ba/F3 cells and an activity of increasing platelets based on the effect of promoting the formation of megakaryocytic colonies. A compound or a pharmaceutically acceptable salt thereof useful in treating thrombocytopenia.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: December 25, 2012
    Assignee: Astellas Pharma, Inc.
    Inventors: Keizo Sugasawa, Susumu Watanuki, Yuji Koga, Hiroshi Nagata, Ryutaro Wakayama, Fukushi Hirayama, Ken-ichi Suzuki
  • Patent number: 8304547
    Abstract: [Object] To provide a therapeutic and/or prophylactic agent for urinary frequency, urinary urgency, and urinary incontinence associated with various lower urinary tract diseases including overactive bladder, various lower urinary tract diseases accompanied by lower urinary tract pain, such as interstitial cystitis, chronic prostatitis, and the like, and various diseases accompanied by pain, based on an excellent trkA receptor inhibitory action.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: November 6, 2012
    Assignee: Astellas Pharma Inc.
    Inventors: Keizo Sugasawa, Kenichi Kawaguchi, Takaho Nomura, Shunichiro Matsumoto, Takashi Shin, Hidenori Azami, Tomoaki Abe, Akira Suga, Ryushi Seo, Masayuki Tanahashi, Toru Watanabe
  • Patent number: 8163746
    Abstract: Provided is an agent for treating or preventing urinary frequency, urinary urgency and urinary, incontinence which are associated with overactive bladder, a lower urinary tract disease such as interstitial cystitis and chronic prostatitis accompanied by lower urinary tract pain, and various diseases accompanied by pain. A novel azolecarboxamide derivative in which an azole ring such as thioazole or oxazole is bonded to a benzene ring, pyridine ring or pyrimidine ring through carboxamide was confirmed to have a potent trkA receptor-inhibitory activity and found to be an agent for treating or preventing lower urinary tract disease and various diseases accompanied by pain, which is excellent in efficacy and safety, and thus the present invention was accomplished.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: April 24, 2012
    Assignee: Astellas Pharma Inc.
    Inventors: Keizo Sugasawa, Kenichi Kawaguchi, Takaho Matsuzawa, Ryushi Seo, Hironori Harada, Akira Suga, Tomoaki Abe, Hidenori Azami, Shunichiro Matsumoto, Takashi Shin, Masayuki Tanahashi, Toru Watanabe
  • Publication number: 20100249088
    Abstract: [Object] To provide a therapeutic and/or prophylactic agent for urinary frequency, urinary urgency, and urinary incontinence associated with various lower urinary tract diseases including overactive bladder, various lower urinary tract diseases accompanied by lower urinary tract pain, such as interstitial cystitis, chronic prostatitis, and the like, and various diseases accompanied by pain, based on an excellent trkA receptor inhibitory action.
    Type: Application
    Filed: October 23, 2008
    Publication date: September 30, 2010
    Applicant: Astellas Pharma Inc.
    Inventors: Keizo Sugasawa, Kenichi Kawaguchi, Takaho Nomura, Shunichiro Matsumoto, Takashi Shin, Hidenori Azami, Tomoaki Abe, Akira Suga, Ryushi Seo, Masayuki Tanahashi, Toru Watanabe
  • Publication number: 20100222361
    Abstract: A 2-acylaminothiazole derivative or a pharmaceutically acceptable salt thereof having an excellent effect of proliferating human c-mpl-Ba/F3 cells and an activity of increasing platelets based on the effect of promoting the formation of megakaryocytic colonies. A compound or a pharmaceutically acceptable salt thereof useful in treating thrombocytopenia.
    Type: Application
    Filed: November 10, 2009
    Publication date: September 2, 2010
    Applicant: Astellas Pharma Inc.
    Inventors: Keizo SUGASAWA, Susumu WATANUKI, Yuji KOGA, Hiroshi NAGATA, Ryutaro WAKAYAMA, Fukushi HIRAYAMA, Ken-ichi SUZUKI
  • Publication number: 20100222329
    Abstract: A 2-acylaminothiazole derivative or a pharmaceutically acceptable salt thereof having an excellent effect of proliferating human c-mpl-Ba/F3 cells and an activity of increasing platelets based on the effect of promoting the formation of megakaryocytic colonies. A compound or a pharmaceutically acceptable salt thereof useful in treating thrombocytopenia.
    Type: Application
    Filed: November 10, 2009
    Publication date: September 2, 2010
    Applicant: Astellas Pharma Inc.
    Inventors: Keizo Sugasawa, Susumu Watanuki, Yuji Koga, Hiroshi Nagata, Ryutaro Wakayama, Fukushi Hirayama, Ken-ichi Suzuki
  • Patent number: 7786106
    Abstract: There are provided compounds having an anticoagulant action on the basis of inhibition of activated blood coagulation factor X and being useful as anticoagulants or preventive/therapeutic agents for diseases induced by thrombosis or embolism. Effective ingredients are the compounds such as 4?-bromo-2?-[(5-chloro-2-pyridyl) carbamoyl]-6?-?-D-galactopyranosyloxy-1-isopropylpiperidine-4-carboxanilide, 2?-(2-acetamido-2-deoxy-?-D-glucopyranosyloxy)-4?-bromo-6?-[(5-chloro-2-pyridyl)carbamoyl]-1-isopropylpiperidine-4-carboxanilide, etc. or salts thereof.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: August 31, 2010
    Assignee: Astellas Pharma Inc.
    Inventors: Tsukasa Ishihara, Fukushi Hirayama, Keizo Sugasawa, Yuji Koga, Takeshi Kadokura, Takeshi Shigenaga
  • Publication number: 20100041668
    Abstract: The present invention in certain embodiments is directed to a pharmaceutical dosage form comprising a therapeutically effective amount of a first agent that agonizes a human TPO receptor by binding to the rhTPO binding site of the human TPO receptor; and a therapeutically effective amount of a second agent that agonizes the human TPO receptor by binding to a binding site of the human TPO receptor distinct from the rhTPO binding site.
    Type: Application
    Filed: August 19, 2009
    Publication date: February 18, 2010
    Applicant: Astellas Pharma Inc.
    Inventors: Ken-Ichi Suzuki, Keizo Sugasawa
  • Patent number: 7638536
    Abstract: A 2-acylaminothiazole derivative or a pharmaceutically acceptable salt thereof having an excellent effect of proliferating human c-mpl-Ba/F3 cells and an activity of increasing platelets based on the effect of promoting the formation of megakaryocytic colonies. A compound or a pharmaceutically acceptable salt thereof useful in treating thrombocytopenia.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: December 29, 2009
    Assignee: Astellas Pharma Inc.
    Inventors: Keizo Sugasawa, Susumu Watanuki, Yuji Koga, Hiroshi Nagata, Kazuyoshi Obitsu, Ryutaro Wakayama, Fukushi Hirayama, Ken-ichi Suzuki
  • Publication number: 20090286766
    Abstract: Provided is an agent for treating or preventing urinary frequency, urinary urgency and urinary, incontinence which are associated with overactive bladder, a lower urinary tract disease such as interstitial cystitis and chronic prostatitis accompanied by lower urinary tract pain, and various diseases accompanied by pain. A novel azolecarboxamide derivative in which an azole ring such as thioazole or oxazole is bonded to a benzene ring, pyridine ring or pyrimidine ring through carboxamide was confirmed to have a potent trkA receptor-inhibitory activity and found to be an agent for treating or preventing lower urinary tract disease and various diseases accompanied by pain, which is excellent in efficacy and safety, and thus the present invention was accomplished.
    Type: Application
    Filed: April 19, 2007
    Publication date: November 19, 2009
    Applicant: ASTELLAS PHARMA INC.
    Inventors: Keizo Sugasawa, Kenichi Kawaguchi, Takaho Matsuzawa, Ryushi Seo, Hironori Harada, Akira Suga, Tomoaki Abe, Hidenori Azami, Shunichiro Matsumoto, Takashi Shin, Masayuki Tanahashi, Toru Watanabe
  • Publication number: 20090137498
    Abstract: There are provided compounds having an anticoagulant action on the basis of inhibition of activated blood coagulation factor X and being useful as anticoagulants or preventive/therapeutic agents for diseases induced by thrombosis or embolism. Effective ingredients are the compounds such as 4?-bromo-2?-[(5-chloro-2-pyridyl)carbamoyl]-6?-?-D-galactopyranosyloxy-1-isopropylpiperidine-4-carboxanilide, 2?-(2-acetamido-2-deoxy-?-D-glucopyranosyloxy)-4?-bromo-6?-[(5-chloro-2-pyridyl)carbamoyl]-1-isopropylpiperidine-4-carboxanilide, etc. or salts thereof.
    Type: Application
    Filed: January 20, 2009
    Publication date: May 28, 2009
    Applicant: ASTELLAS PHARMA INC.
    Inventors: Tsukasa Ishihara, Fukushi Hirayama, Keizo Sugasawa, Yuji Koga, Takeshi Kadokura, Takeshi Shigenaga
  • Patent number: 7504417
    Abstract: There are provided compounds having an anticoagulant action on the basis of inhibition of activated blood coagulation factor X and being useful as anticoagulants or preventive/therapeutic agents for diseases induced by thrombosis or embolism. Effective ingredients are the compounds such as 4?-bromo-2?-[(5-chloro-2-pyridyl)carbamoyl]-6?-?-D-galactopyranosyloxy-1-isopropylpiperidine-4-carboxanilide, 2?-(2-acetamido-2-deoxy-?-D-glucopyranosyloxy)-4?-bromo-6?-[(5-chloro-2-pyridyl)carbamoyl]-1-isopropylpiperidine-4-carboxanilide, etc. or salts thereof.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: March 17, 2009
    Assignee: Astellas Pharma Inc.
    Inventors: Tsukasa Ishihara, Fukushi Hirayama, Keizo Sugasawa, Yuji Koga, Takeshi Kadokura, Takeshi Shigenaga
  • Patent number: 7361658
    Abstract: 2-Acylaminothiazole derivatives or salts thereof which have a platelet increasing activity based on an excellent human c-mpl-Ba/F3 cell growth function and a function of accelerating formation of megakaryocytic colonies and which are useful for treating thrombocytopenia are provided.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: April 22, 2008
    Assignee: Astellas Pharma Inc.
    Inventors: Keizo Sugasawa, Yuji Koga, Kazuyoshi Obitsu, Takao Okuda, Koichiro Harada, Hideki Kubota, Fukushi Hirayama, Masaki Abe, Ken-ichi Suzuki
  • Patent number: 7307074
    Abstract: To provide a compound which has an anticoagulation action based upon inhibition of activated blood coagulation factor X and is useful as an anticoagulant or an agent for prevention and treatment of diseases caused by thrombus or embolus. A diazepan derivative such as 4-[(3-carbamimidoylphenylamino)methyl]-3-[4-(4-methyl-1,4-diazepan-1-yl)benzoylamino]benzoic acid and 3-hydroxy-4?-methoxy-2-{[4-(4-methyl-1,4-diazepan-1-yl)benzoyl]amino}benzanilide or a salt thereof is an effective ingredient.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: December 11, 2007
    Assignee: Astellas Pharma Inc.
    Inventors: Fukushi Hirayama, Hiroyuki Koshio, Tsukasa Ishihara, Norio Seki, Shunichiro Hachiya, Keizo Sugasawa, Ryota Shiraki, Yuji Koga, Yuzo Matsumoto, Takeshi Shigenaga, Souichirou Kawazoe
  • Patent number: 7285554
    Abstract: Drugs, in particular, pyrazole derivatives represented by the following general formula (I) which have a calcium release-activated calcium channel inhibitory effect and medicinal compositions, in particular, calcium release-activated calcium channel inhibitors containing the above compounds as the active ingredient, (in the formula, each symbol has the following meaning: D: pyrazolyl which may have 1 to 3 substituents selected from the group consisting of -Alk, -lower alkenyl, -lower alkynyl, -halogeno-lower alkyl, -Alk-cycloalkyl, -Alk-O-Alk, -cycloalkyl, —O-Alk, —COOH, —COO-Alk and -Hal, n: 0 or 1, B: phenylene, a nitrogen-containing, divalent, saturated ring group, or a monocyclic, divalent heteroaromatic ring group which may be substituted with Alk, X: —NR1—CR2R3—, —CR2R3—NR1—, —NR1—SO2—, —SO2—NR1— or —CR4?CR5—, and A: benzene ring which may have one or more substituents; mono-, di- or tricyclic fused heteroaryl which may have one or more substituents; cycloalkyl which may have one or more substi
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: October 23, 2007
    Assignee: Astellas Pharma Inc.
    Inventors: Hirokazu Kubota, Yasuhiro Yonetoku, Keizo Sugasawa, Masashi Funatsu, Souichirou Kawazoe, Akira Toyoshima, Yoshinori Okamoto, Jun Ishikawa, Makoto Takeuchi
  • Publication number: 20070203153
    Abstract: The present invention in certain embodiments is directed to a pharmaceutical dosage form comprising a therapeutically effective amount of a first agent that agonizes a human TPO receptor by binding to the rhTPO binding site of the human TPO receptor; and a therapeutically effective amount of a second agent that agonizes the human TPO receptor by binding to a binding site of the human TPO receptor distinct from the rhTPO binding site.
    Type: Application
    Filed: November 7, 2006
    Publication date: August 30, 2007
    Applicant: Astellas Pharma Inc.
    Inventors: Ken-Ichi Suzuki, Keizo Sugasawa
  • Patent number: RE43481
    Abstract: To provide a compound which has an anticoagulation action based upon inhibition of activated blood coagulation factor X and is useful as an anticoagulant or an agent for prevention and treatment of diseases caused by thrombus or embolus. A diazepan derivative such as 4-[(3-carbamimidoylphenylamino)methyl]-3-[4-(4-methyl-1,4-diazepan-1-yl)benzoylamino]benzoic acid and 3-hydroxy-4?-methoxy-2-{[4-(4-methyl-1,4-diazepan-1-yl)benzoyl]amino}benzanilide or a salt thereof is an effective ingredient.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: June 19, 2012
    Assignee: Astellas Pharma Inc.
    Inventors: Fukushi Hirayama, Hiroyuki Koshio, Tsukasa Ishihara, Norio Seki, Shunichiro Hachiya, Keizo Sugasawa, Ryota Shiraki, Yuji Koga, Yuzo Matsumoto, Takeshi Shigenaga, Souichirou Kawazoe