WO2009136239A2 - Medizinische einrichtung und verfahren zu ihrer herstellung - Google Patents
Medizinische einrichtung und verfahren zu ihrer herstellung Download PDFInfo
- Publication number
- WO2009136239A2 WO2009136239A2 PCT/IB2009/000545 IB2009000545W WO2009136239A2 WO 2009136239 A2 WO2009136239 A2 WO 2009136239A2 IB 2009000545 W IB2009000545 W IB 2009000545W WO 2009136239 A2 WO2009136239 A2 WO 2009136239A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- medical device
- kininogen
- domain
- coating
- layer
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
Classifications
-
- 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
- A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
- A61L29/14—Materials characterised by their function or physical properties, e.g. lubricating compositions
- A61L29/16—Biologically active materials, e.g. therapeutic substances
-
- 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
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L31/16—Biologically active materials, e.g. therapeutic substances
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1027—Making of balloon catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/104—Balloon catheters used for angioplasty
-
- 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
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/20—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing organic materials
- A61L2300/252—Polypeptides, proteins, e.g. glycoproteins, lipoproteins, cytokines
-
- 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
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/416—Anti-neoplastic or anti-proliferative or anti-restenosis or anti-angiogenic agents, e.g. paclitaxel, sirolimus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M2025/0057—Catheters delivering medicament other than through a conventional lumen, e.g. porous walls or hydrogel coatings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1027—Making of balloon catheters
- A61M25/1029—Production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of layers of balloon material around a mandril
- A61M2025/1031—Surface processing of balloon members, e.g. coating or deposition; Mounting additional parts onto the balloon member's surface
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1027—Making of balloon catheters
- A61M25/1029—Production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of layers of balloon material around a mandril
Definitions
- the invention relates to a medical device and a method for its production.
- Implants in the form of stents and catheters for percutaneous, transluminal coronary angioplasty are inserted into blood vessels using endovascular techniques to relieve bottlenecks. In any case, they should make the vessel in which they are used consistent.
- restenosis i. the reclosure of the vessel after dilatation of a vessel and / or the insertion of a stent. Restenosis is due to the proliferation of cells, especially smooth muscle cells, which settle on the inner wall of the vessel and cause the free lumen of the vessel to narrow again. Excessive cell attachment can lead to life-threatening situations, especially in the coronary area.
- US-A-5,891,108 discloses a hollow-shaped stent which contains in its interior pharmaceutical active ingredients which by a variety of openings are released in the stent.
- EP-AI 127 582 describes another variant of a stent which is suitable for receiving an active substance.
- Medicated stent coatings are known, for example, from WO 95/03036 A, where in particular paclitaxel-containing coatings are described.
- DE-10244847 A1 describes a PTCA catheter coated with paclitaxel.
- Coated PTCA catheters are design-related coatings that deliver paclitaxel or other drugs directly to the vessel wall.
- Colombo "Late Acute Thrombosis after Paclitaxel Elluting Stent Implantation", Heart 2001, 86, 262-264 artificially prolonged healing time represents a more or less open wound in the vessel wall, which can easily lead to clots and thromboses, so thromboses have been observed one year after the successful and uncomplicated use of drug-coated stents, E. McFadden et al, Lancet 2004, 364, 1519-1521. Furthermore, implants coated with anti-proliferative drugs according to recent findings appear to significantly increase the risk of heart attacks. No long-term studies have been published in the field of coated PTCA B allon catheters with paclitaxel or rapamycin.
- Delayed release is detrimental to the desired purpose because it requires a sustained release of the drug, especially in the first few days after implantation.
- the intermittent release is undesirable because the drugs used are highly effective systems that can cause damage at higher concentrations.
- WO 2004/05513 A discloses the use of aptamers for coating surfaces to promote the adhesion of biological material.
- the coated articles may be implants, including those intended for the vascular system.
- the biological material can be, for example, stem cells, epithelial cells and the like as well as their precursor cells. act.
- the aptamers are bound to the implant surface.
- the surface, ie the implant can consist of a plastic material. The attachment takes place in a photochemical manner.
- microproteins with up to 40 amino acids have become known, which are able to adopt conformationally stable three-dimensional structures, which makes them versatile binding molecules.
- microproteins are cystine knot proteins (Krause et al., FEBS 2007, 274, 86-95).
- the object of the present invention is to provide improved medical facilities.
- This object is achieved with a medical device having a base body and a coating, wherein the device has a coating with a kininogen or with a domain 5 of a kinin gene.
- High molecular weight kininogen is an endogenous 626 amino acid single stranded plasma glycoprotein with a glycosylation-dependent molecular weight of 88-120 kDa.
- the molecule consists of 6 domains with different properties and functions.
- HK is also referred to as alpha2-thiol Proteinase inhibitor and belongs to the superfamily of cystatins, which are cysteine proteinase inhibitors. It was initially identified as the precursor molecule of the bioactive peptide bradykinin and has an average plasma concentration of 0.67 ⁇ M.
- HK is also known as William-Fitzgerald-Flaujeac Factor or simply Fitzgerald Factor of the intrinsic pathway of blood clotting, acting as an activating, nonenzymatic cofactor for Factor XII (Hegemann Factor) and XI. HK also has this activating function for prekallikrein in the kinin-kallikrein system. It therefore plays an important role in many pathophysiological processes, such as fibrinolysis, thrombosis and inflammatory processes.
- a lack of kininogen is not only associated with a prolonged aPTT clotting time, but according to recent studies, it also favors the development of abdominal aortic aneurysms on Brown Norway rats and makes internal organs susceptible to fat degeneration.
- kallikrein By proteolytic cleavage of high molecular weight kininogen using kallikrein, the so-called activated kininogen (HKa) is released by leaching out the short-lived bradykinin, which contains large portions of domain 4.
- Bradykinin is a potent vasodilator that affects blood pressure, permeability of small blood vessels, and pain perception. In addition, it promotes angiogenesis.
- HKa is a double-stranded molecule formed by a conformational change, consisting of a heavy chain with Domains 1, 2 and 3 and a light chain containing domains 5 and 6. Both chains are linked by disulfide bridges. In HKa, a larger area of domain 5 is exposed on the surface compared to HK.
- the medical device may in particular be a PTA or PTCA catheter or stent, especially for use in the vascular system.
- PTA or PTCA catheter or stent especially for use in the vascular system.
- other implants can also benefit from the improved healing properties.
- Layer or coating in the sense of the invention is any type of coating which is superficially applied to the balloon catheter or stent.
- coatings according to the invention are an amino-functionalized or carboxyl-functionalized coating, which are applied to the balloon catheter or stent by means of amination and to which the kininogen is covalently or photochemically bound.
- the surfaces can be modified in different ways.
- the kininogen or domain 5 of the kininogen may be chemically modified. This can lead to a further improvement of the healing properties, the inhibition of proliferation and the epithelial cells.
- the coating has a molecule with a specific binding affinity for CD-34-positive cells.
- the CD-34 positive cells may be endothelial progenitor cells.
- chemically modified cells with the same behavior can be used. This accelerates the endothelialization and thus counteracts restenosis.
- the kininogen or domain 5 of the kininogen may be physically or chemically bound.
- the strength of the bond to the body can be varied. If the medical device is a catheter, a weaker binding is advantageous since the kininogen or domain 5 of the kininogen should remain at the point of use beyond the removal of the catheter. In the case of an implant, on the other hand, a stronger bond can be chosen because it remains in the body.
- the medical device has at least one hemocompatible layer. This can be placed in particular as a base or base layer directly on the balloon.
- the medical device may optionally comprise one or more further layers, including at least one further layer to which the above-described kininogen, in particular the domain 5 of the kininogen is bound.
- haemocompatible layers superficially applied oxide layers are also possible.
- the medical institution tion can also be modified by hydroxylation or amination so that they can bind kininogens or their domain 5 according to the invention.
- the hemocompatible coating further improves blood compatibility, while the kininogens or their domain 5 promote rapid docking of endothelial cells and prevention of proliferation and, thus, rapid healing of the affected vessel.
- the medical facility has a biocompatible base layer.
- This may be an oxide layer, a surface obtained by amination or a plastic layer.
- the kininogen or domain 5 of the kininogen may be bound to the hemocompatible or biocompatible base layer.
- the medical device may have an amino-functionalized layer.
- a carboxyl-functionalized layer may also be advantageous. Both layers lead to a stable binding of the kininogen or the domain 5 of the kininogen to the main body.
- the medical device has a pharmaceutical. This can then be released continuously to the environment.
- the medical facility has a biosoluble topcoat. This protects the medical device, but dissolves after implantation.
- the kininogen or domain 5 of the kinin gene is evenly distributed on the surface of the medical device.
- the uniform distribution of kininogens or their domain 5 over the entire surface of the PTCA catheter or stent causes the uniform and controlled delivery to the cells, in addition to endothelial cells and smooth muscle cells.
- endothelial cell docking occurs within a few hours, as experiments have shown.
- kininogen and the domain 5 of the kininogen additionally counteract proliferation of the damaged vessel.
- the domain 5 of the kininogen may be distributed only on one side of the medical device facing the bloodstream, thereby accelerating the healing process.
- an antiproliferative active substance can be distributed on one side of the medical device facing the vessel wall. This counteracts proliferation.
- the kininogen or domain 5 of the kininogen may be incorporated into a matrix. As a result, the kininogen is slowly released to the surrounding tissue (drug eluting).
- the medical facility has molecularly imprinted polymers. That is, the medical device has a layer that has a specific binding affinity for CD-34 positve
- Comprising cells and containing molecularly imprinted polymers are present in the form of a coating, but also in the form of nanoparticles, which are applied alone or in addition to the implants.
- Molecular imprinting technology can be used to generate synthetic molecular recognition materials that are comparable in their affinity to biological systems.
- Molecular imprinting is a template polymerization that creates artificial molecular recognition sites.
- the target molecules are mixed with functional monomers and crosslinkers and then subjected to a radical polymerization, which forms a highly crosslinked polymer.
- the target molecules act as templates - the polymerization takes place around them. If the template molecules are removed by extraction, voids remain in the polymer network, which represent the spatial arrangement of functional groups. This freezing of the structure gives rise to specific recognition sites in the polymer material.
- the target molecules of interest in each case serve as target molecules, in this case the target structures of the CD-34 positive Cells or endothelial progenitor cells. Their improved attachment leads to a Poliferationshemmung.
- Another aspect of the invention includes a method of manufacturing medical devices wherein the coating is applied to the implant by immersion, plasma, 3d-droplet, or spray or CVD methods.
- Another aspect relates to a PTCA catheter for directly applying the kininogen or domain 5 of the kininogen to a vessel wall, the catheter having a microporous balloon filled with a solution containing the kininogen or domain 5 of the kininogen. is filled.
- a final aspect of the invention relates to a method in which the kininogen or the domain 5 of the kininogen are applied directly to a vessel wall.
- HKa 2-chain high molecular weight kininogen
- the purified HKa then shows a band of 110 kDa in non-reduced sodium dodecyl sulfate (SDS) gels and two bands of 62 and 46 kDa in reduced SDS gels.
- SDS sodium dodecyl sulfate
- the gulthatione S-transferase (GST) fusion peptide of domain 5 of the kininogen is prepared by fusing the GST N-terminally with the sequences K420 to S513.
- the mutants are purified via a glutathione column to a purity of> 95%.
- the buffer for this consists of 50 mM ammonium bicarbonate, pH 8.5 at a final concentration of 100 mg / ml. Subsequently, the peptides are freeze-dried.
- thermo-sensitive gel must first be prepared as it is supplied in powder form.
- the gel solidifies and can be processed. Now the coating of the PTCA catheter or stent takes place.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Pulmonology (AREA)
- Biophysics (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Molecular Biology (AREA)
- Vascular Medicine (AREA)
- Epidemiology (AREA)
- Child & Adolescent Psychology (AREA)
- Surgery (AREA)
- Materials For Medical Uses (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112009001050T DE112009001050A5 (de) | 2008-05-06 | 2009-03-17 | Medizinische Einrichtung und Verfahren zu ihrer Herstellung |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202008006190.3 | 2008-05-06 | ||
| DE200820006190 DE202008006190U1 (de) | 2008-05-06 | 2008-05-06 | Restenoseprophylaxe |
| DE102008063889A DE102008063889A1 (de) | 2008-05-06 | 2008-12-19 | Medizinische Einrichtung und Verfahren zu ihrer Herstellung |
| DE102008063889.7 | 2008-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2009136239A2 true WO2009136239A2 (de) | 2009-11-12 |
| WO2009136239A3 WO2009136239A3 (de) | 2010-07-29 |
Family
ID=39628665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2009/000545 Ceased WO2009136239A2 (de) | 2008-05-06 | 2009-03-17 | Medizinische einrichtung und verfahren zu ihrer herstellung |
Country Status (2)
| Country | Link |
|---|---|
| DE (3) | DE202008006190U1 (de) |
| WO (1) | WO2009136239A2 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2683750B2 (ja) * | 1988-06-06 | 1997-12-03 | 住友電気工業株式会社 | カテーテル用バルーン |
| US5114413A (en) * | 1990-06-08 | 1992-05-19 | Wisconsin Alumni Research Foundation | Methods to make and use proteinaceous material present in kinin-free high molecular weight kininogen |
| CN1502331A (zh) | 1993-07-19 | 2004-06-09 | Ѫ�ܼ���ҩ�﹫˾ | 抗血管生长组合物及使用方法 |
| US5891108A (en) | 1994-09-12 | 1999-04-06 | Cordis Corporation | Drug delivery stent |
| CA2337565A1 (en) | 2000-02-25 | 2001-08-25 | Cordis Corporation | Use of cladribine on a stent to prevent restenosis |
| US20040072770A1 (en) | 2002-07-03 | 2004-04-15 | Besterman Jeffrey M. | Methods for specifically inhibiting histone deacetylase-7 and 8 |
| DE10244847A1 (de) | 2002-09-20 | 2004-04-01 | Ulrich Prof. Dr. Speck | Medizinische Vorrichtung zur Arzneimittelabgabe |
| DE10258924A1 (de) | 2002-12-17 | 2004-07-08 | Eberhard-Karls-Universität Tübingen Universitätsklinikum | Mit die Adhäsion von biologischem Material vermittelnden Substanzen beschichtete Vorrichtung |
-
2008
- 2008-05-06 DE DE200820006190 patent/DE202008006190U1/de not_active Expired - Lifetime
- 2008-12-19 DE DE102008063889A patent/DE102008063889A1/de not_active Withdrawn
-
2009
- 2009-03-17 DE DE112009001050T patent/DE112009001050A5/de not_active Withdrawn
- 2009-03-17 WO PCT/IB2009/000545 patent/WO2009136239A2/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE112009001050A5 (de) | 2011-06-01 |
| DE102008063889A1 (de) | 2009-11-26 |
| DE202008006190U1 (de) | 2008-07-17 |
| WO2009136239A3 (de) | 2010-07-29 |
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