NO20001071L - Nye biomimetiske hydrogelmaterialer - Google Patents

Nye biomimetiske hydrogelmaterialer

Info

Publication number
NO20001071L
NO20001071L NO20001071A NO20001071A NO20001071L NO 20001071 L NO20001071 L NO 20001071L NO 20001071 A NO20001071 A NO 20001071A NO 20001071 A NO20001071 A NO 20001071A NO 20001071 L NO20001071 L NO 20001071L
Authority
NO
Norway
Prior art keywords
hydrogel materials
new
biomimetic hydrogel
preparation
methods
Prior art date
Application number
NO20001071A
Other languages
English (en)
Norwegian (no)
Other versions
NO20001071D0 (no
Inventor
Carolyn Bertozzi
Ravindranath Mukkamala
Qing Chen
Hopin Hu
Dominique Baude
Original Assignee
Univ California
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ California filed Critical Univ California
Publication of NO20001071D0 publication Critical patent/NO20001071D0/no
Publication of NO20001071L publication Critical patent/NO20001071L/no

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041—Lenses
    • G02B1/043—Contact lenses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14—Macromolecular materials
    • A61L27/16—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/52—Hydrogels or hydrocolloids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/38—Esters containing sulfur
    • C08F220/382—Esters containing sulfur and containing oxygen, e.g. 2-sulfoethyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/52—Amides or imides
    • C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2430/00—Materials or treatment for tissue regeneration
    • A61L2430/16—Materials or treatment for tissue regeneration for reconstruction of eye parts, e.g. intraocular lens, cornea
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S524/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S524/916—Hydrogel compositions
NO20001071A 1997-09-03 2000-03-02 Nye biomimetiske hydrogelmaterialer NO20001071L (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5744497P 1997-09-03 1997-09-03
PCT/US1998/018257 WO1999011692A1 (fr) 1997-09-03 1998-09-02 Nouvelles matieres biomimetiques du type hydrogel

Publications (2)

Publication Number Publication Date
NO20001071D0 NO20001071D0 (no) 2000-03-02
NO20001071L true NO20001071L (no) 2000-05-03

Family

ID=22010595

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20001071A NO20001071L (no) 1997-09-03 2000-03-02 Nye biomimetiske hydrogelmaterialer

Country Status (7)

Country Link
US (2) US6107365A (fr)
EP (1) EP1017737B1 (fr)
JP (1) JP4330268B2 (fr)
AU (1) AU9216998A (fr)
DE (1) DE69839054T2 (fr)
NO (1) NO20001071L (fr)
WO (1) WO1999011692A1 (fr)

Families Citing this family (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1168934B1 (fr) * 1999-04-12 2008-02-13 Cornell Research Foundation, Inc. Systeme de formation d'hydrogel a composants hydrophobes et hydrophiles
US6410643B1 (en) 2000-03-09 2002-06-25 Surmodics, Inc. Solid phase synthesis method and reagent
WO2002087734A1 (fr) * 2001-04-27 2002-11-07 Millipore Corporation Nouvelles membranes recouvertes et autres articles
EP1474719A4 (fr) * 2002-02-15 2005-12-14 Zms Llc Procede de polymerisation et materiaux destines a des applications biomedicales
WO2006053007A2 (fr) * 2004-11-09 2006-05-18 Angiotech Biocoatings Corp. Revetement d'aiguille antimicrobien pour perfusion prolongee
US20070026043A1 (en) * 2003-11-20 2007-02-01 Angiotech International Ag Medical devices combined with diblock copolymer compositions
AT413102B (de) * 2004-06-29 2005-11-15 Univ Wien Tech Verfahren zur herstellung von polymeren trägermaterialien auf basis von kohlenhydrat-bis-(meth)acrylamiden
US20070265341A1 (en) * 2004-07-01 2007-11-15 The Schepens Eye Research Institute Inc. Compositions and methods for treating eye disorders and conditions
CA2572344A1 (fr) * 2004-07-01 2006-01-19 Schepens Eye Research Compositions et procedes servant a traiter des troubles et affections de l'oeil
GB0426822D0 (en) * 2004-12-07 2005-01-12 Precisense As Sensor for detection of glucose
GB0426823D0 (en) * 2004-12-07 2005-01-12 Precisense As Sensor for detection of glucose
JP2008529606A (ja) * 2005-02-04 2008-08-07 オーバーン ユニバーシティ 接触薬物送達システム
US8349352B2 (en) * 2005-02-04 2013-01-08 Auburn University Therapeutic contact lenses with anti-fungal delivery
US9238003B2 (en) 2005-02-04 2016-01-19 Auburn University Extended or continuous wear silicone hydrogel contact lenses for the extended release of comfort molecules
US8388995B1 (en) 2006-02-03 2013-03-05 Auburn University Controlled and extended delivery of hyaluronic acid and comfort molecules via a contact lens platform
US7857856B2 (en) * 2005-03-15 2010-12-28 Warsaw Ortho Pedic, Inc. Composite spinal nucleus implant with water absorption and swelling capabilities
US9804295B2 (en) * 2005-05-05 2017-10-31 Novartis Ag Ophthalmic devices for sustained delivery of active compounds
US9644039B2 (en) 2006-03-24 2017-05-09 The Regents Of The University Of California Acid-degradable and bioerodible modified polyhydroxylated materials
US20080157035A1 (en) * 2006-10-30 2008-07-03 Colloidal Materials, Llc Hydrogel Photonic Crystals That Can Be Dehydrated And Re-Hydrated
WO2008060575A2 (fr) 2006-11-13 2008-05-22 Auburn University Système et procédé d'administration de médicaments
CA2693808C (fr) * 2007-07-19 2015-10-20 Alcon, Inc. Lentilles et materiaux de flux metabolite et ionique eleve
US8138290B2 (en) 2008-01-25 2012-03-20 Bausch & Lomb Incorporated High water content ophthalmic devices
US8034396B2 (en) * 2008-04-01 2011-10-11 Tyco Healthcare Group Lp Bioadhesive composition formed using click chemistry
SG171985A1 (en) 2008-12-11 2011-07-28 Agency For Science Techonology And Res Glucose-peg conjugates for reducing glucose transport into a cell
CA2753162A1 (fr) 2009-02-21 2010-08-26 Sofradim Production Composes amphiphiles et compositions a auto-assemblage obtenues a partir de ceux-ci
US8512728B2 (en) 2009-02-21 2013-08-20 Sofradim Production Method of forming a medical device on biological tissue
EP2398941B1 (fr) 2009-02-21 2016-07-13 Sofradim Production Fibres réticulées et leur procédé de production par extrusion
US8968733B2 (en) * 2009-02-21 2015-03-03 Sofradim Production Functionalized surgical adhesives
WO2010096649A1 (fr) 2009-02-21 2010-08-26 Tyco Healthcare Group Lp Dispositifs médicaux présentant des surfaces activées
WO2010096654A1 (fr) 2009-02-21 2010-08-26 Tyco Healthcare Group Lp Dispositifs médicaux présentant des surfaces activées
WO2010095055A1 (fr) 2009-02-21 2010-08-26 Sofradim Production Fibres réticulées et procédé de fabrication associé à l'aide de rayons uv
US8877170B2 (en) * 2009-02-21 2014-11-04 Sofradim Production Medical device with inflammatory response-reducing coating
AU2010215200A1 (en) 2009-02-21 2011-10-13 Sofradim Production Apparatus and method of reaching polymers by exposure to UV radiation to produce injectable medical devices
AU2010215194A1 (en) 2009-02-21 2011-10-13 Sofradim Production Apparatus and method of reacting polymers passing through metal ion chelated resin matrix to produce injectable medical devices
US8663689B2 (en) * 2009-02-21 2014-03-04 Sofradim Production Functionalized adhesive medical gel
US9273191B2 (en) 2009-02-21 2016-03-01 Sofradim Production Medical devices with an activated coating
AU2010215199B2 (en) 2009-02-21 2015-01-15 Sofradim Production Compounds and medical devices activated with solvophobic linkers
US8535477B2 (en) 2009-02-21 2013-09-17 Sofradim Production Medical devices incorporating functional adhesives
JP2013509963A (ja) 2009-11-09 2013-03-21 スポットライト テクノロジー パートナーズ エルエルシー 断片化ヒドロゲル
CN102695500A (zh) 2009-11-09 2012-09-26 聚光灯技术合伙有限责任公司 多糖基水凝胶
US8795331B2 (en) 2010-03-25 2014-08-05 Covidien Lp Medical devices incorporating functional adhesives
US9272074B2 (en) * 2010-03-25 2016-03-01 Sofradim Production Surgical fasteners and methods for sealing wounds
CN103068863B (zh) * 2010-06-17 2015-01-28 巴斯夫欧洲公司 包含糖侧基的聚合物及其用途
AU2011276443A1 (en) 2010-06-29 2013-01-31 Covidien Lp Microwave-powered reactor and method for in situ forming implants
EP2588153A2 (fr) 2010-07-01 2013-05-08 Sofradim Production Dispositif médical comportant une intégration cellulaire activée prédéfinie
CA2805987C (fr) 2010-07-27 2019-04-09 Sofradim Production Fibres polymeres ayant des elements reactifs aux tissus
WO2012036838A2 (fr) * 2010-09-15 2012-03-22 3M Innovative Properties Company Composés saccharidiques substitués et compositions dentaires
TWI421306B (zh) * 2011-02-21 2014-01-01 Far Eastern New Century Corp 具有高含水率之聚矽氧水膠
CN103958460B (zh) 2011-10-05 2016-04-06 阿克马法国公司 多羟基取代的氨基化合物、包含其的聚合物及其用途
EP2799536B1 (fr) * 2011-12-28 2021-08-11 JSR Corporation Inhibiteur de l'adhérence cellulaire
US8940812B2 (en) * 2012-01-17 2015-01-27 Johnson & Johnson Vision Care, Inc. Silicone polymers comprising sulfonic acid groups
US9468595B2 (en) 2012-11-02 2016-10-18 Empire Technology Development Llc Acrylamide derivatives
US9238774B2 (en) 2012-11-02 2016-01-19 Empire Technology Development Llc Soil fixation, dust suppression and water retention
US9174871B2 (en) 2012-11-02 2015-11-03 Empire Technology Development Llc Cement slurries having pyranose polymers
WO2014088557A1 (fr) * 2012-12-04 2014-06-12 Empire Technology Development Llc Hydrogels d'acrylamide pour l'ingénierie tissulaire
WO2014088555A1 (fr) 2012-12-04 2014-06-12 Empire Technology Development Llc Adhésifs en acrylamide à hautes performances
US9775928B2 (en) 2013-06-18 2017-10-03 Covidien Lp Adhesive barbed filament
WO2015134000A1 (fr) * 2014-03-04 2015-09-11 Empire Technology Development Llc Composés conducteurs à base d'acrylamide, et leurs procédés de préparation et leurs utilisations
EP3210201B8 (fr) 2014-10-24 2020-09-23 The Trustees Of The University Of Pennsylvania Procédés et dispositifs de modélisation de l'oeil
US9714897B2 (en) 2015-02-09 2017-07-25 Slingshot Biosciences, Inc. Hydrogel particles with tunable optical properties and methods for using the same
KR20230169485A (ko) 2015-02-25 2023-12-15 디시전 사이선씨즈 메디컬 컴패니, 엘엘씨 음향 신호 전송 접촉매질 및 결합 매체
EP3070133B1 (fr) 2015-03-18 2019-02-20 The Swatch Group Research and Development Ltd. Pièce d'horlogerie ou de bijouterie comprenant une surface recouverte d'un agent épilame et procédé d'épilamage d'un tel substrat
EP3070152B1 (fr) 2015-03-18 2018-02-28 The Swatch Group Research and Development Ltd. Substrat comprenant une surface recouverte d'un agent épilame et procédé d'épilamage d'un tel substrat
EP3290451B1 (fr) 2016-09-01 2021-08-18 The Swatch Group Research and Development Ltd. Substrat comprenant une surface recouverte d'un agent épilame et procédé d'épilamage d'un tel substrat
CN106565902B (zh) * 2016-10-21 2018-05-04 长春工业大学 一种蜗牛仿生粘性水凝胶及其制备方法
CA3130104A1 (fr) * 2019-03-06 2020-09-10 Decision Sciences Medical Company, LLC Procedes de fabrication et de distribution d'articles de couplage acoustique semi-rigide et emballage pour imagerie par ultrasons
US11154274B2 (en) 2019-04-23 2021-10-26 Decision Sciences Medical Company, LLC Semi-rigid acoustic coupling articles for ultrasound diagnostic and treatment applications
CA3235582A1 (fr) 2021-10-29 2023-05-04 Anh Tuan Nguyen Particules d'hydrogel en tant que cellules nourricieres et en tant que cellules presentatrices d'antigenes synthetiques
WO2023215886A1 (fr) 2022-05-05 2023-11-09 Slingshot Biosciences, Inc. Particules modifiées en tant que mimétiques de globules rouges (rbc) et compositions les contenant pour l'hématologie
WO2023235885A1 (fr) 2022-06-02 2023-12-07 Slingshot Biosciences, Inc. Mimétique de cellule apoptotique

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163609A (en) * 1978-10-10 1979-08-07 Neefe Charles W Self cleaning contact lens
US5135965A (en) * 1984-12-18 1992-08-04 T. R. Developments, Ltd. Hydrogel-forming polymers used in intraocular lenses
US4511477A (en) * 1985-04-15 1985-04-16 The Dow Chemical Company Process of using water-absorbent agents for low pH applications
US5093447A (en) * 1986-02-06 1992-03-03 Novicky Nick N Ophthalmic device formed of a copolymer plastic material from ethylenic siloxanylalkoxy ester
CA1222845A (fr) * 1986-02-06 1987-06-09 Progressive Chemical Research Ltd. Verres de contact en silicone-sulfone et silicone- fluorocarbone-sulfone permeables aux gaz
US4954587A (en) * 1988-07-05 1990-09-04 Ciba-Geigy Corporation Dimethylacrylamide-copolymer hydrogels with high oxygen permeability
US5214452A (en) * 1988-12-19 1993-05-25 Ciba-Geigy Corporation Hydrogels based on fluorine-containing and saccharide monomers
US5185466A (en) * 1989-01-05 1993-02-09 Branko Kozulic Hydrophilic and amphiphatic monomers, their polymers and gels and hydrophobic electrophoresis
US5070215A (en) * 1989-05-02 1991-12-03 Bausch & Lomb Incorporated Novel vinyl carbonate and vinyl carbamate contact lens material monomers
JPH03140312A (ja) * 1989-10-27 1991-06-14 Tokuyama Soda Co Ltd 重合性組成物
US5157093A (en) * 1990-05-10 1992-10-20 Ciba-Geigy Corporation Hydroxyethyl cellulose derivatives containing pendant (meth)acryloyl units bound through urethane groups and hydrogel contact lenses made therefrom
US5410016A (en) * 1990-10-15 1995-04-25 Board Of Regents, The University Of Texas System Photopolymerizable biodegradable hydrogels as tissue contacting materials and controlled-release carriers
US5219965A (en) * 1990-11-27 1993-06-15 Bausch & Lomb Incorporated Surface modification of polymer objects
JP3196361B2 (ja) * 1991-12-25 2001-08-06 日立化成工業株式会社 塗料用樹脂組成物及び海中構造物用防汚塗料
US5292514A (en) * 1992-06-24 1994-03-08 Minnesota Mining And Manufacturing Company Azlactone-functional substrates, corneal prostheses, and manufacture and use thereof
US5336797A (en) * 1992-12-30 1994-08-09 Bausch & Lomb Incorporated Siloxane macromonomers
IL109221A (en) * 1993-04-12 1998-04-05 Johnson & Johnson Vision Prod Polymeric ophthalmic lens with contact containing saccharide residues
JPH07175217A (ja) * 1993-12-17 1995-07-14 Mitsubishi Paper Mills Ltd 平版印刷版
EP0668294B1 (fr) * 1994-02-15 1999-08-18 Novartis AG Dérivés insaturés d'hydrates de carbone, leurs polymères et leurs utilisations
TW291481B (en) * 1994-10-27 1996-11-21 Novartis Erfind Verwalt Gmbh Poly-unsaturated carbohydrate derivatives, polymers thereof and their use
JPH11130744A (ja) * 1997-10-29 1999-05-18 Menicon Co Ltd 架橋性化合物およびそれを用いてなる光学材料

Also Published As

Publication number Publication date
DE69839054D1 (de) 2008-03-13
US6552103B1 (en) 2003-04-22
US6107365A (en) 2000-08-22
WO1999011692A1 (fr) 1999-03-11
JP4330268B2 (ja) 2009-09-16
DE69839054T2 (de) 2009-01-15
EP1017737A1 (fr) 2000-07-12
NO20001071D0 (no) 2000-03-02
EP1017737A4 (fr) 2002-06-26
AU9216998A (en) 1999-03-22
JP2001515924A (ja) 2001-09-25
EP1017737B1 (fr) 2008-01-23

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