Patents Assigned to DISEASE ADSORPTION SYSTEM TECHNOLOGIES CO., LTD.
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Publication number: 20200163938Abstract: The present invention provides a pharmaceutical composition comprising an iron chelating agent exhibiting antitumor activity, antimicrobial activity, and/or antivirus activity and having reduced side effects. Specifically, the present invention provides a pharmaceutical composition for use in treatment of cancer or infectious disease, comprising an iron chelating agent that selectively binds to biologically unstable iron, rather than to transferrin-bound iron.Type: ApplicationFiled: May 10, 2018Publication date: May 28, 2020Applicant: Disease Adsorption System Technologies Co., Ltd.Inventors: Yuzo NISHIDA, Toshiaki OHARA, Kazuhiro OMORI, Yasuko TOMONO
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Patent number: 10308725Abstract: A chelate compound wherein a chelate-forming moiety is attached to a base compound having an amino group and at least a part of the amino group is in the form of a halide salt. A specific example of the halide salt is hydrochloride. As the base compound, a chitosan having a glucosamine skeleton is preferred. Also, chitosan beads are usable. The chelate compound is produced by reacting the base compound having an amino group with an aldehyde group of an aromatic cyclic compound, aromatic cyclic compound having at least a functional group capable of forming a chelate and the aldehyde group, to form a Schiff base, reducing the Schiff base with a reducing agent and then treating with a hydrohalogenic acid (hydrochloric acid).Type: GrantFiled: September 29, 2015Date of Patent: June 4, 2019Assignee: DISEASE ADSORPTION SYSTEM TECHNOLOGIES CO., LTD.Inventor: Yuzo Nishida
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Patent number: 9796605Abstract: Disclosed is a water-insoluble polymeric iron chelating agent having a polymer backbone and an aromatic ring attached to the polymer backbone through an —NH—CH2— bond, wherein the aromatic ring has one or two first functional groups in the form of hydroxyl group and one or two second functional groups located at the ortho position with respect to the first functional group; and wherein the second functional group is —OH, —COOH, or a group represented by formula (I) wherein A represents —CH3, —CH2—CH3, —CH2—C6H5, —CH2—C5H4N or —CH2—COOH and B represents —CH2—COOH. The water-insoluble polymeric iron chelating agent of the present invention offers the advantages of being capable of selectively chelating iron ions, particularly biologically unstable iron, and being insoluble in water, and moreover not being incorporated in metabolic processes in vivo.Type: GrantFiled: January 12, 2012Date of Patent: October 24, 2017Assignees: DISEASE ADSORPTION SYSTEM TECHNOLOGIES CO., LTD., NATIONAL UNIVERSITY CORPORATION ASAHIKAWA MEDICAL UNIVERSITYInventors: Yuzo Nishida, Yutaka Kohgo, Katsuya Ikuta, Katsunori Sasaki
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Publication number: 20170210828Abstract: A chelate compound wherein a chelate-forming moiety is attached to a base compound having an amino group and at least a part of the amino group is in the form of a halide salt. A specific example of the halide salt is hydrochloride. As the base compound, a chitosan having a glucosamine skeleton is preferred. Also, chitosan beads are usable. The chelate compound is produced by reacting the base compound having an amino group with an aldehyde group of an aromatic cyclic compound, aromatic cyclic compound having at least a functional group capable of forming a chelate and the aldehyde group, to form a Schiff base, reducing the Schiff base with a reducing agent and then treating with a hydrohalogenic acid (hydrochloric acid).Type: ApplicationFiled: September 29, 2015Publication date: July 27, 2017Applicant: DISEASE ADSORPTION SYSTEM TECHNOLOGIES CO., LTD.Inventor: Yuzo NISHIDA
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Patent number: 9034789Abstract: Provided are an adsorptive carbon which can effectively adsorb vivotoxins such as advanced glycation end products (AGEs), and an adsorbent containing the adsorptive carbon as an active ingredient. The adsorptive carbon according to the present invention has a total pore volume of 0.10 to 1.0 mL/g, an average pore diameter of 1.0 to 2.0 nm, and an absorbance of an infrared absorption band at 1650-1800 cm?1 of no less than 0.005.Type: GrantFiled: March 2, 2011Date of Patent: May 19, 2015Assignee: DISEASE ADSORPTION SYSTEM TECHNOLOGIES CO., LTD.Inventors: Masato Higuchi, Takao Kimura, Masayoshi Takeuchi, Kisaburo Deguchi
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Publication number: 20130292337Abstract: Disclosed is a water-insoluble polymeric iron chelating agent having a polymer backbone and an aromatic ring attached to the polymer backbone through an —NH—CH2— bond, wherein the aromatic ring has one or two first functional groups in the form of hydroxyl group and one or two second functional groups located at the ortho position with respect to the first functional group; and wherein the second functional group is —OH, —COOH, or a group represented by formula (I) wherein A represents —CH3, —CH2—CH3, —CH2—C6H5, —CH2—C5H4N or —CH2—COOH and B represents —CH2—COOH. The water-insoluble polymeric iron chelating agent of the present invention offers the advantages of being capable of selectively chelating iron ions, particularly biologically unstable iron, and being insoluble in water, and moreover not being incorporated in metabolic processes in vivo.Type: ApplicationFiled: January 12, 2012Publication date: November 7, 2013Applicants: National University Corporation ASAHIKAWA MEDICAL UNIVERSITY, DISEASE ADSORPTION SYSTEM TECHNOLOGIES CO., LTD.Inventors: Yuzo Nishida, Yutaka Kohgo, Katsuya Ikuta, Katsunori Sasaki
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Publication number: 20130040812Abstract: Provided are an adsorptive carbon which can effectively adsorb vivotoxins such as advanced glycation end products (AGEs), and an adsorbent containing the adsorptive carbon as an active ingredient. The adsorptive carbon according to the present invention has a total pore volume of 0.10 to 1.0 mL/g, an average pore diameter of 1.0 to 2.0 nm, and an absorbance of an infrared absorption band at 1650-1800 cm?1 of no less than 0.005.Type: ApplicationFiled: March 2, 2011Publication date: February 14, 2013Applicant: DISEASE ADSORPTION SYSTEM TECHNOLOGIES CO., LTD.Inventors: Masato Higuchi, Takao Kimura, Masayoshi Takeuchi, Kisaburo Deguchi